Display/Screen Problems with Samsung Laptop

Hello everyone!I am desesperate because I dropped my laptop a few days ago and the screen is acting crazy, I really need help!!Here are links to some pictures of how it looks like right now.For some reason, the whole screen is "zoomed" in, so everything is expanded, larger and moved up. Also, because of this enlargement, the whole screen is moved and I can not see the right side anymore (like as it was cut).There also is a thick white line under the desktop. For some reason, under the white line, the upper part of the desktop appears too.The whole screen has some kind of blue/yellow/pink/white tone over it, it keeps changing when I turn it on, and since today, when I close the screen it goes back to normal color but after the screen turns off because of not using it for a few minutes, it turns into those blue/yellow/pink or white tones again.I've tried many things already: changing the screen resolution, switching to the other graphic card, changing the graphic card controls, updating the graphic cards, etc, etc but nothing works...I am currently living in Japan for a few months and I tried calling to a few places to let it be fixed but as soons as they hear that it is Samsung, they tell me they will not repair it. I called Samsung Japan and they say they can not fix things I did not buy here, and I called Samsung Germany (that's where I bought it) to ask them but they say that they can not do anything if I do not come to Germany, since they would not even ship it back internationally...I really really need this laptop and buying a new one is not an option....The model of my laptop is Samsung Serie 5 NP550P7C-T0ADE Notebook 17,3":-17,3" mattes HD Display with LED-Backgroundlighting 1600 x 900 dpi-Graphics: NVIDIA GeForce GT 630M with 2048 MB (Optimus Technology)Please, If anyone has any ideas about what else I could try out, I will apreciate it a lot!!Thank you!

Display/Screen Problems with Samsung Laptop 1

How much cost to repair Apple iPhone 4 display screen in India?

The cost to repair your Apple iPhone 4 screen totally depends on which method you choose to fix it up. Few of the methods are like getting it fixed from authorized Apple service center or getting it fixed by a local repair shop in your area or to do it yourself. * The 1st option is to go to authorized Apple service center. They will charge a hefty amount on the same, but this will ensure 100% genuine replacement screen with warranty. Means this is the only method to ensure that you will get 100% genuine original screen and will get some limited time warranty on the part. * The 2nd option is to go to some local mobile repair shop in your area, where you can get your Apple iPhone 4 repaired for a better price deal but this wo not ensure good quality part and an unreliable warranty. Just make sure that you do not get fooled by a shop who claims to have a original screen for a higher price. Do you really think he can have tie ups with Apple and get original genuine parts from them? The only way these shops can have a original screen is if they took out the screen from some other phone. Do It Yourself * The 3rd and the best option is to get a high quality replacement LCD Screen with Touch Digitizer for your Apple iPhone 4 from a reliable online store (like maxbhi.com) and get it fitted from the local repair shop for just 200-300 Rs. This way you will get a good quality display screen with good prices and a reliable warranty. You can even try to do this yourself with the help of youtube videos and phone opening toolkit for Apple iPhone 4. As per our research, Apple iPhone 4 screen replacement should cost something around 700 Rupees in India.

How much cost to repair Apple iPhone 6 display screen in India?

The cost to repair your Apple iPhone 6 screen totally depends on which method you choose to fix it up. Few of the methods are like getting it fixed from authorized Apple service center or getting it fixed by a local repair shop in your area or to do it yourself. * The 1st option is to go to authorized Apple service center. They will charge a hefty amount on the same, but this will ensure 100% genuine replacement screen with warranty. Means this is the only method to ensure that you will get 100% genuine original screen and will get some limited time warranty on the part. * The 2nd option is to go to some local mobile repair shop in your area, where you can get your Apple iPhone 6 repaired for a better price deal but this wo not ensure good quality part and an unreliable warranty. Just make sure that you do not get fooled by a shop who claims to have a original screen for a higher price. Do you really think he can have tie ups with Apple and get original genuine parts from them? The only way these shops can have a original screen is if they took out the screen from some other phone. Do It Yourself * The 3rd and the best option is to get a high quality replacement LCD Screen with Touch Digitizer for your Apple iPhone 6 from a reliable online store (like maxbhi.com) and get it fitted from the local repair shop for just 200-300 Rs. This way you will get a good quality display screen with good prices and a reliable warranty. You can even try to do this yourself with the help of youtube videos and phone opening toolkit for Apple iPhone 6. As per our research, Apple iPhone 6 screen replacement should cost something around 1500 Rupees in India.

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Design Scheme of Single Card Network Cable Control System for Ultra-high Definition LED Display Scre
Design Scheme of Single Card Network Cable Control System for Ultra-high Definition LED Display Scre
Abstract: for the current 2 & times; Due to the low bandwidth of 1 Gbit / s network led display controller, a design scheme of ultra-high definition LED display single card network cable control system based on 10 Gbit / s Ethernet IEEE 802.3an standard, using twisted pair as transmission medium and transmission distance of 100 m is proposed. HDMI 1.4a/dvi dual input is adopted for audio and video, 10GbE LAN / WAN PHY is adopted for communication, medium and high-grade field programmable gate array (FPGA) with XAUI / sgmii interface is adopted for information processing, and Gigabit network matrix shunting technology is adopted for screen display distribution, so as to realize LED display 4k2k, 3D display and audio synchronous playback controlled by single card.introductionAt present, many companies have launched 4k2k (physical resolution 3840 & Themes; 2160 or 4096 & Themes; 2160) high-end graphics cards, ultra-high definition TVs, naked eye 3D TVs and projectors. In both horizontal and vertical directions, 4k2k specification is the existing mainstream Full HD display device 1920 & tides; Twice the 1080p resolution, the total number of pixels has reached more than 8 million, four times that of Full HD. In the field of LED full-color display, especially in the application of stage background screen and square advertising screen, due to its infinite splicing characteristics, more than 4k2k high-grade LED display and 3dled display have already come out. However, the current mainstream LED display control system in the market mainly adopts DVI input dual port Gigabit network mode for short distance and single channel 1 - 3. 125gbit / s optical fiber communication mode for long distance. The maximum resolution supported by the single board can only reach 1280 when 8-bit color scale input 1024 (60 Hz, no compression). If you want to support ultra-high resolution display or output above 30 bit color scale, you must use multi card or multi controller system and expensive video segmentation splicer. Obviously, the current LED display control system, especially the short-range dual port Gigabit network control system, which has been used for many years, has lagged behind the development of video and communication technology and can not meet the higher needs of the market and users. Therefore, based on the development of the previous generation of dual port Gigabit Network LED controller, a HDMI / DVI dual input ultra-high definition LED display single card network cable control system is designed, which greatly improves the bandwidth, function and cost performance of the traditional LED display controller.1 overall designThe UHD LED display single card network cable control system includes sending and receiving parts. Figure 1 shows the transmitter control logic design, including HDMI input port, DVI input port, USB interface, adv7619, CP2102, FPGA, DDR, flash, PCIe socket, peripherals and high-speed communication logic.Figure 1 Schematic diagram of transmitter logic designFigure 2 shows the receiver control logic design, including high-speed communication logic, FPGA and 3 4 ports 1GBIT / s PHY, 12 It integrates RJ45 socket, DDR, flash, audio output and external equipment, in which the high-speed communication logic is exactly the same as the transmitter.Figure 2 Schematic diagram of receiver logic design.
How to Adjust the Brightness and Color of LED Display Screen
How to Adjust the Brightness and Color of LED Display Screen
LED display screen is more and more favored by the market because of its excellent brightness and color performance and seamless picture integrity. However, some cities also have problems affecting the life and traffic of surrounding residents due to the high brightness of LED display screen. ? Here, I'll share some tips.oneSelection of primary color wavelengthLED display screen is widely used in all walks of life, and there are different requirements for the primary color wavelength of LED in different application places. Some of the selection of the primary color wavelength of LED is to achieve good visual effect, some is to meet people's habits, and some are the provisions of industry standards, national standards and even international standards. For example, the selection of the primary color wavelength of the green tube in the full-color LED display screen; In the early days, yellow green LEDs with a wavelength of 570nm were widely used. Although the cost was low, the color gamut of the display screen was small, the color reduction degree was poor and the brightness was low. After selecting the pure green tube with the wavelength of 525nm, the color gamut of the display screen is nearly doubled, and the color reduction is greatly improved, which greatly improves the visual effect of the display screen. Another example is the stock market display. People are usually used to using red to indicate the rise of stock prices, green to indicate the decline of stock prices, and $to indicate flat prices. In the transportation industry, the national standard strictly stipulates that the blue-green band indicates passage and the red band is prohibited. Therefore, the selection of primary color wavelength is one of the important links of LED display screen.twoBrightness adjustment1. Modulating pulse width, using the changing frequency that human eyes can feel, and using pulse width modulation method to realize gray control, that is, periodically changing the optical pulse width. Pulse width modulation is more suitable for digital control and has been widely used. The most common method is to adopt microcomputer. At present, almost all LED displays adopt pulse width modulation to control the gray level.2. The normal LED tube allows the continuous task current to be about 20 mA. By changing the current flowing through the LED, except that the red LED is saturated, the brightness of other LEDs is basically proportional to the current flowing.threeAllocation of white field color coordinatesWhite field color coordinate allocation is one of the most basic technologies of full-color LED display. However, in the mid-1990s, due to the lack of industry standards and basic testing methods, the white field color coordinates were usually determined only by human eyes and feelings, resulting in serious color deviation and randomness of white field color temperature. With the promulgation of industry standards and the completion of testing methods, many manufacturers began to standardize the color matching process of full-color screen. However, due to the lack of theoretical guidance of color matching, some manufacturers often allocate 100 field color coordinates at the expense of the gray level of some primary colors, and the comprehensive performance can not be improved.fourColor adjustmentHD LED display is displayed according to the principle of three primary colors of light. Determining one of the red, green and blue colors as the benchmark is mainly determined according to the brightness of the red, green and blue colors of the selected product. Generally, the brightness benchmark is the one with low brightness proportion. When one of the benchmarks has reached the maximum brightness, it is necessary to adjust another color for the two-color LED display screen, For the full-color LED display, it is necessary to adjust the colors of the other two LEDs.
The Brightness Index Characteristics and Identification of LED Electronic Display Screen Are Discuss
The Brightness Index Characteristics and Identification of LED Electronic Display Screen Are Discuss
As a media of publicity, LED display screen appears frequently in our life, and the demand for maintenance identification materials relative to LED electronic display screen is also increasing. Let's discuss how to identify the brightness of LED electronic display screen.First, let's understand what is the brightness of LED electronic display:The brightness of LED light-emitting tube refers to the intensity of light emitted by the light-emitting body, which is called light intensity and expressed by MCD. The luminous brightness of LED screen is a comprehensive index, which refers to the comprehensive index of the total luminous amount (luminous flux) of all LED modules in unit volume and the illuminance at a certain distance.Brightness of LED display screen: the unit of luminous intensity brightness per unit area in a given direction is CD / m2.The brightness is directly proportional to the number of LEDs per unit area and the brightness of the LED itself. The brightness of LED is directly proportional to its driving current, but the service life is inversely proportional to the square of its current, so the driving current cannot be excessively increased in order to pursue brightness. Under the same point density, the brightness of LED display screen depends on the material, packaging form and size of LED chip. The larger the chip, the higher the brightness; Conversely, the lower the brightness.So what are the brightness requirements for the screen body?General brightness requirements are as follows:(1) Indoor LED display: 800cd / m2(2) Semi indoor LED display screen: 2000cd / m2(3) Outdoor LED display (south facing north): 4000cd / m2(4) Outdoor LED display (facing south): 8000CD / m2The quality of LED light-emitting tubes sold in the market is uneven, and most of the brightness can not be guaranteed. The phenomenon of shoddy goods deceives consumers. Most people do not have the ability to identify the brightness of LED light-emitting tubes. Therefore, businesses say that the brightness is the brightness. And it is difficult to distinguish with the naked eye, so how to identify it?1 How to identify the brightness of LED electronic display screen1. Make a 3V DC power supply convenient for connecting light-emitting diodes, preferably made of batteries. Two button batteries can be used, which are installed in a small plastic tube and lead out two probes as positive and negative output. The tail end is directly made into a switch with shrapnel. When in use, the positive and negative probes correspondingly contact the positive and negative pins of the LED, press and hold the switch at the tail end, and the LED is powered on.2. Secondly, a simple light measuring device is composed of a photoresist and a digital multimeter. Two thin wires are led out of the photoresist and directly connected to the two probes of the digital multimeter. The gear of the multimeter is placed at 20K (depending on the photoresist, try to make the reading accurate). Note that the measured value is actually the resistance of the photoresist. Therefore, the brighter the light is, the smaller the value is.3. Take an LED and light it with more than 3V DC. The light emitting head is facing and close to the photosensitive surface of the connected photosensitive resistor. At this time, the multimeter will read to distinguish the luminous brightness of the LED.2 Brightness discrimination level refers to the brightness level between the darkest and whitest images that can be distinguished by human eyes.The gray level of LED electronic display screen is very high, which can reach 256 or even 1024. However, due to the limited sensitivity of human eyes to brightness, these gray levels can not be fully recognized. In other words, many people with adjacent gray levels may look the same. And eye discrimination varies from person to person. For the display screen, the more the human eye recognition level, the better, because the displayed image is for people to see after all. The more brightness levels that human eyes can distinguish, the larger the color space of the display screen, and the greater the potential to display rich colors. The brightness identification level can be tested with special software. Generally, the display screen can reach more than level 20, which is a better level.3 Requirements for brightness and visual angle:The brightness of the indoor full-color LED display screen should be more than 800cd / m2, and the brightness of the outdoor full-color display screen should be more than 1500cd / m2 to ensure the normal operation of the display screen, otherwise the displayed image will not be seen clearly because the brightness is too low. The brightness is mainly determined by the quality of LED die. The size of the visual angle directly determines the audience of the LED display screen, so the larger the better. The viewing angle is mainly determined by the die package.It is very necessary to determine the brightness of LED electronic display screen. At present, the brightness requirements of urban bright LED display screen, or new regulations are issued. If the brightness of LED screen is too high, it will cause trouble to nearby residents. In order to avoid adverse reactions, businesses need to have relevant professional knowledge when customizing and maintaining LED displays.The above is about how to identify the real brightness index brightness of LED electronic display screen. I hope it will help you. In addition, the brightness of LED display screen is not the bigger the better, but the appropriate brightness will achieve unexpected results according to the use demand.
Difference Between LCD Splicing Screen and Large LED Display Screen
Difference Between LCD Splicing Screen and Large LED Display Screen
LCD splicing screen and LED display large screen are recognized as the most popular and widely used large screen display products in the display market; However, many people are curious about the similarities and differences between the two. Today, Xiaobian will specifically distinguish the characteristics of the two products.1. Brightness due to the strong outdoor lighting, the brightness of the large LED display screen is relatively high, and the brightness of the splicing screen is as high as 7000CD / m In order to adapt to some special environment or users with special requirements. 2. The stitching of the splicing screen can be followed by the naked eye, which is also a disadvantage of the splicing screen itself; The large LED display screen can not see the distance between the lamp beads within the visual distance, but if it is close to the visual range, the image will begin to blur and deform; For example, under the visual condition of P3, if the LED is viewed within 3M close to the screen, the picture must be distorted.3. Quotation: two clocks show the quotation of the large screen, and the LED is calculated according to the square of the project and other expenses; The splicing screen is calculated according to the number of splicing units, processing software, installation cost, etc. 4. The operation time splicing screen can support 7 * 24 hours of uninterrupted and non-destructive hardness, while the large LED reality screen must rest after running for more than 8 hours to ensure the service life of the product. 5. Different splicing technologies. The splicing screen is composed of multiple LCD splicing screens, which supports multiple signal inputs. It can realize the simultaneous display of multiple images and can be enlarged or reduced arbitrarily, so as to realize roaming and cross screen display. In addition, it can also realize single screen segmentation with decoding platform, so that users with multiple monitoring images can display all images on a large screen at the same time; The small spacing LED is the fine processing of LED display technology, which reduces the point spacing.The above are several important differences between the splicing screen and the LED display screen. I hope it will be helpful to some buyers who have just touched the splicing screen or LED. If you have any questions, you can leave a message for consultation.Source: Huabang yingzhuanxian Technology http://www.hbony.com/ , it is personal original, if you need to reprint, please indicate the source.
What Should I Do When the LED Display Screen Does Not Work? Is There Any Solution
What Should I Do When the LED Display Screen Does Not Work? Is There Any Solution
When the LED display screen is installed or used, sometimes the display screen does not work. At this time, many people who do not know the principle may feel that the quality of LED display screen is not good and ask to replace the screen. In fact, the phenomenon that the display screen does not work has nothing to do with the quality of the screen. Let's talk about the handling method of LED display screen not working.The first case that the LED display screen does not work is that the display screen does not work and the green light of the sending card flashes (made into retractable type).The main reason for this situation is that the screen body has no power supply; The network cable is not connected properly; The receiving card has no power supply or the power supply voltage is too low; The sending card is broken; The signal transmission intermediate equipment is connected or faulty (e.g. function card, optical fiber transceiver). The sequence of troubleshooting methods to be adopted at this time is: check and confirm that the power supply of the screen is normal; Check and reconnect the network cable; Ensure that the DC output power supply of the power supply is 5-5.2v; Replace the sending card; Check the connection or replace the function card (optical transceiver).The second case that the LED display screen does not work is that the Maipu Guangcai display screen does not work and the green light of the sending card does not flash.The main reason for this problem is that the DVI or HDMI cable is not connected properly; The copy or expansion mode is not set in the graphics card control panel; The software chooses to turn off the power supply of the large screen; The sending card is not inserted in place or there is a problem with the sending card. At this time, the detection sequence of exclusion method is: check the DVI cable connector; Reset the copy mode; The software selects to turn on the large screen power supply; Reinsert the sending card or replace the sending card.The above are the main problems and detection methods of LED display screen inoperative. I hope it will help you.fqj
Introduction of Advanced Technology Automatic Brightness Control in LED Display Screen
Introduction of Advanced Technology Automatic Brightness Control in LED Display Screen
The cutting-edge technology in LED display screen --- automatic brightness control. LED electronic display screen is composed of many independent pixel points (luminous elements). Due to the separation of pixel points, its luminous control and driving can only be carried out digitally. The luminous states of these pixels are synchronously controlled and independently driven by the controller. Video true color display means that the brightness of each pixel should be controlled separately and completed synchronously within the specified scanning time. The large screen is composed of tens of thousands of pixels, which greatly increases the complexity of the system compared with the large screen of binary display, and puts forward higher requirements for the overall data transmission speed. It is obviously unrealistic to set a conventional D / A for each pixel. We must find a solution that can minimize the system complexity and improve the performance as much as possible.According to the visual principle, the average brightness feeling of a pixel can depend on its on / off duty cycle. In other words, the brightness can be controlled as long as the pixel on / off duty cycle is adjusted. For the LED electronic display screen, this means that the brightness D / a conversion is realized as long as the number representing the brightness of the pixel is converted into the luminous time of the pixel (D / T conversion).Set the refresh cycle of screen data as, and the data controlling the lighting degree of any pixel is n-bit binary numberD = bi2i (where Bi = 0 or 1)Ton is the luminous time corresponding to D, then the duty cycle of pixel on / off is:d=Ton/Ts=D= bi2iThe expression can be realized by preset subtraction counter, but a counter for each pixel will make the display circuit extremely complex. The above formula is rewritten as: ton = TS bi2i, which means that ton can be divided into several time periods. When it is enough, the visual effect of ton synthesized by several separation time periods is the same as that of continuous ton with the same total length. Therefore, generally, for n-bit binary data d = bi2i, divide TS into n segments, and select the appropriate time division function f (I), so that segment I Ti = TSF (I), where 0tibi = TS f (I) Bi, then? d=Ton/Ts=TIbi/Ts=f(i)biThat is, the on / off duty cycle of this pixel. Since the function f (I) can be common to all pixels, the above formula shows that as long as f (I) is used to uniformly control each pixel, independent and synchronous D / T conversion of all pixels on the whole screen can be realized. For a single pixel, the above formula can be realized with the circuit of Fig. 1. In the figure, SFR is an 8-bit shift register and the figure shows the waveform of time division function f (I).The driving circuit of large screen display usually adopts the structure of "serial shift latch drive" in order to minimize the data transmission line. To realize the above formula on the full screen at the same time, all st signals can be controlled by F (I). Of course, the premise of this is that the same weight bits in each pixel control data are stored in the shift register, which can be achieved through pre-processing.
Phenomenon and Solution of LED Display Screen Not Working
Phenomenon and Solution of LED Display Screen Not Working
When the LED display screen is installed or used, sometimes the display screen does not work. At this time, many people who do not know the principle may feel that the quality of LED display screen is not good and ask to replace the screen. In fact, the phenomenon that the display screen does not work has nothing to do with the quality of the screen. Let's talk about the handling method of LED display screen not working.The first case that the LED display screen does not work is that the display screen does not work and the green light of the sending card flashes (made into retractable type). The main reason for this situation is that the screen body has no power supply; The network cable is not connected properly; The receiving card has no power supply or the power supply voltage is too low; The sending card is broken; The signal transmission intermediate equipment is connected or faulty (e.g. function card, optical fiber transceiver). The sequence of troubleshooting methods to be adopted at this time is: check and confirm that the power supply of the screen is normal; Check and reconnect the network cable; Ensure that the DC output power supply of the power supply is 5-5.2v; Replace the sending card; Check the connection or replace the function card (optical transceiver).The second condition that the LED display screen does not work is that the display screen does not work and the green light of the sending card does not flash. The main reason for this problem is that the DVI or HDMI cable is not connected properly; The copy or expansion mode is not set in the graphics card control panel; The software chooses to turn off the power supply of the large screen; The sending card is not inserted in place or there is a problem with the sending card. At this time, the detection sequence of exclusion method is: check the DVI cable connector; Reset the copy mode; The software selects to turn on the large screen power supply; Reinsert the sending card or replace the sending card.The above are the main problems and detection methods of LED display screen inoperative. I hope it will help you.
How to Deal with the Flower Screen on LCD Display Screen
How to Deal with the Flower Screen on LCD Display Screen
This or that problem may occur during the use of any product. LCD display is fragile, and you should be particularly careful in use. Friends often encounter problems about LCD display flower screen. Then what is the general reason for LCD display flower screen, and how to deal with LCD display flower screen? Take a look with Xiaobian with these questions.The LCD display screen is blurred, and the picture shakes badly. Sometimes even the icons and text can't be seen clearly, but it will return to normal after one or two minutes. This phenomenon mostly occurs in wet weather, which is due to moisture inside the display. To completely solve this problem, use the moisture-proof sand in the food packaging to string it with cotton thread, then open the back cover of the display, and hang the moisture-proof sand near the tube seat at the tail of the tube neck of the display tube. In this way, even in wet weather, the above "problems" will not appear again.The LCD display screen has a flower screen and color lines appear on the display screen. In fact, to solve this problem, we should first know that there are two main reasons for the appearance of color lines: first, if it is a full screen color line or a color line that appears with the change of display content, usually their position is not fixed and generally will not fill the whole screen, Most of this is caused by problems with the graphics card, such as overheating of the video memory or driver errors. The general treatment is to reinstall and set the graphics card driver. If the graphics card is overclocked, please also reduce the rated power, clean the graphics card fan or heat sink and strengthen the heat dissipation of the chassis.Secondly, if the LCD display screen has one or more lines covering the whole screen, even if the display content changes, the position and color of the lines do not change. Most of the reasons are problems with the control chip or wiring of the LCD display screen. Such problems can only be sent to the LCD display screen manufacturer for maintenance.
What Is Creative LED Display Screen and the Advantages of Creative LED Display Screen
What Is Creative LED Display Screen and the Advantages of Creative LED Display Screen
With the improvement of human living standards and the pursuit of spirit, people have higher and higher requirements for LED display screen. Creative LED display came into being. Creative LED display, also known as special-shaped screen, is a new branch of LED display application, with innovation and creativity as the core.Creative LED display screen refers to the LED display screen with special appearance, which is derived from the traditional LED display screen. The creative LED display breaks the simple square shape of the traditional LED screen. It can be spliced into various irregular shapes to display highly creative content.The creative LED display screen can select specific installation methods according to the overall structure and environment of the building, and the size and size can be customized according to the site requirements. In terms of appearance, the LED creative screen can not only attract the attention of the audience for the first time to achieve better publicity effect, but also better expand the application scope of large screen splicing. In real life, you can see creative LED displays with different shapes, including arc, diamond, sphere, barrel, arch, magic cube, cylinder, etc.Innovation, creativity as the core, embodies the innovative spirit, unique modeling, strong rendering ability, full personality and amazing effect.Advantages of creative LED displayToday, the tide of creative industry is sweeping the world. With the extreme pursuit of dynamic dance effects in various cultural performances, wedding performances, opening performances and entertainment, creative display has increasingly become the focus and focus of competition in the field of indoor large screen display and related companies. First, the creative LED display shows the personalized culture. For each creative exhibition project, after in-depth interview, careful listening and careful combing, an exclusive customized solution is formed, which uses metaphorical exaggeration and gorgeous video effects to be visualized through new media technologies.Secondly, the innovative LED display screen can become a city landmark and enhance the city image. On the basis of architecture or landscape, combined with the basic elements and symbols of architecture, seek the best visual language, perfectly integrate the LED display elements and architecture from the perspective of art and aesthetics, further beautify and upgrade, and realize the sublimation of value. And realize the city landmark to enhance the city image.Technically, creative LED display screen must not only have the core technology of LED display screen, but also need rich artistic modeling, structural mechanics technology and experience. In the future, creative LED display will be used in various applications, such as urban light carving, environmental art, architectural appearance, interior decoration, etc.With its unique personality, creative LED display has been in the industry for more than 10 years. Now the arrival of personalized era just brings a new vitality to the creative display and makes the creative LED display more vivid and charming.fqj
Samsung Has Developed Ultra-thin Interactive Holographic Display Screen, and the Era of Holographic
Samsung Has Developed Ultra-thin Interactive Holographic Display Screen, and the Era of Holographic
At the 2020 world artificial intelligence conference held on July 9 this year, Ma Yun and musk were "on the same stage" again.Affected by the epidemic situation that day, waic adopted the cloud form for the first time in its history. As the final speaker of the opening ceremony of the conference, Ma Yun was in Yunnan. A technology connected him with us - holographic projection.In fact, this technology has a history of more than 70 years.As early as 1947, the British Hungarian physicist g bor D NES invented holographic projection. Based on this achievement, he won the young's prize of the British Physical Society in 1967 and the Nobel Prize in physics in 1971.Recently, Samsung, known as the "display overlord", has made a new breakthrough in this field - proposed an ultra-thin interactive holographic display, which can provide high-resolution and highly realistic 3D video from multiple angles. In the future, it can be integrated into mobile devices to support office or home.What is holography?The scientific research team to achieve this breakthrough comes from Samsung Institute of advanced technology (sait), the optical research group of sait Russia and Seoul University.On November 10, 2020, his paper was published in nature communication, a subsidiary of nature, entitled slim panel holography video display.Before understanding this paper, what is holography is the first problem to understand.Holographic projection is essentially a 3D technology. Its English name is holographic projection, in which holo comes from Greek, meaning "complete information".To deliver a "complete message", you need two steps:Shooting: using the interference principle (that is, when two or more columns of waves overlap in space, they will be superimposed to form a new waveform), the object beam formed by the subject under laser irradiation and the laser reference beam emitted on the holographic negative will be superimposed to generate interference and recorded. After certain processing, the hologram is obtained.Imaging: Based on the diffraction principle (i.e. the wave will deviate from the original linear propagation when encountering obstacles), the hologram is illuminated by coherent laser. The diffracted light wave of a linearly recorded sinusoidal hologram can give two images, which enhances the three-dimensional sense of the image and has a real visual effect.In short, the principle of holographic projection technology can be understood as: skillfully take an object into a photo by using two physical phenomena, and then create a three-dimensional feeling.For this reason, holographic projection is also called virtual imaging.It is worth mentioning that when real objects and holograms are in the same space, they can be perceived without difference.For example, in the following photo, a real hand holds a holographic display screen, on which is the image of an elf. Both the hologram and the hand are 0.3 meters away from the camera that took the picture.Holographic display provides natural depth perception, and the audience pays more attention to the spirit itself than the screen.In contrast, if it is a traditional three-dimensional 3D image using binocular parallax and convergence (i.e. convergence of eyes when looking at near objects), the audience may not be able to clearly see the elf image and hand at the same time, and there will be visual fatigue caused by reconciliation convergence conflict.Therefore, holographic display can be said to be an important part of the future video system.In fact, since its discovery in 1947, holographic technology has become a classic element in science fiction films, and people's cognition of it has always been that it can reproduce the most real 3D images without visual discomfort.The viewing angle is expanded by 30 times, and 4K high-resolution holograms are generated in real timeIn 1990, the MIT Media Lab developed the first holographic video system. Since then, the commercialization of holographic video has become a major research direction in this field.In May 2018, American camera giant red launched the world's first commercial holographic projection smartphone hydrogenone.At that time, although this mobile phone attracted great attention from the outside world, when the product was launched, people in the industry and the media said that this mobile phone failed to give a satisfactory user experience in holographic projection. In fact, until today, there is still a bottleneck in the realization of "commercial holographic video display".Samsung Seoul University team said in the paper: commercial holographic video displays have not been introduced in batches, mainly due to narrow viewing angle, bulky optical equipment and high requirements for computing power.Specifically, to build a mobile holographic video display suitable for commercialization, three obstacles need to be overcome:1. The limitation of space bandwidth product (SBP), which determines the size and viewing angle of holographic image.2. In order to produce large coherent background light, complex optical elements and considerable space are needed to process light. Therefore, it is not easy to realize a holographic video display as thin as a tablet.3. Real time holograms usually require a lot of calculation, and the amount of calculation will increase with the increase of spatial bandwidth product.Based on the above problems, the ultra-thin interactive holographic display proposed by Samsung & Seoul University team has two special designs:One is the steering backlight unit composed of coherent Blu (c-blu) and beam deflector (BD). On the one hand, it expands the effective spatial bandwidth product (i.e. viewing angle) by 30 times, thus realizing the dynamic hologram with the largest viewing angle in history; On the other hand, its diffractive waveguide architecture ensures the final ultra-thin design of the display screen, with a total thickness of no more than 10 cm.The two blue arrows in the following figure are the expanded visual range.The second is a holographic video processor including data propagation unit (DPU), filter and scaling unit (FSU) and 32 fast inverse Fourier transform processors. A single chip can generate 4K high-resolution holograms in real time.Finally, the prototype of holographic video display screen is shown in the figure below. The marks in the figure below are: spatial light modulator, geometric phase lens, coherent backlight unit, beam deflector and holographic video processor from top to bottom.Moreover, the system bus used by Samsung Seoul University team is ambaaxi4, which is widely used in smartphone application processor. Therefore, embedding holographic video processor into smartphone application processor can also be realized in the future.Finally, let's feel a 4K turtle swimming map projected by this holographic display screen that supports multi angle viewing. The direction the turtle swims can be controlled by pressing the key directly.It seems ordinary, but in fact, due to the different depth of all objects in the picture, the definition of holographic objects will change with the focus of the camera.The following figure is a video screenshot. In the illustration at the upper right corner of figure a, coral is clearer than tortoise; In the illustration of figure B, turtles are clearer than corals.This is the same as whether our camera focuses or not. Naturally, it also reflects the uniqueness of holograms - they can provide debugging, and the final image is no different from the real object.So far, holographic projection, a magical technology with a history of more than 70 years, has made an important breakthrough. We are not far from holographic projection on mobile phones. Editor ajx
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