Today, let's learn about the important precautions for the use of LED electronic display screen, one of the mainstream in terminal display equipment.
LED is a light source conductor with light-emitting diode as light-emitting material. As a solid-state semiconductor device, it can directly convert electric energy into light energy; Moreover, LED electronic display screen is also an advanced digital information product. "It" successfully integrates computer technology, image processing technology, network communication technology, embedded control and other technologies, so that it has flexible display area, arbitrary splicing, high resolution, high brightness, low heat, long life, low power consumption and economic benefits Environmental protection, durability and other performance advantages, it is a terminal display product that can display in an all-round way.
However, LED electronic display also has some "disadvantages". Therefore, the following points should be paid attention to when purchasing or using:
1 The filling factor should be high
So, what is the filling factor? The filling factor of LED electronic display screen is also called bright area ratio column, that is, the ratio of each luminous area to the physical surface area occupied by the pixel. Moreover, the LED electronic display screen is arranged by discrete pixels, and there are obvious non luminous black areas between its pixels. Therefore, when viewed from a close distance, the picture is discontinuous and incomplete, and the brightness is uneven, resulting in a sense of particles. If the light source is limited to a small pixel surface area, resulting in the brightness of a single pixel being several times or even more than ten times that of the whole screen, It will cause a more serious glare. The TCO'99 standard recognized by the flat panel display industry stipulates that the filling factor of display equipment shall not be less than 50%.
For the LED electronic display screen with the same point spacing, the attenuation of the small filling coefficient is more than that of the large filling coefficient, so the shooting distance needs to be increased; If the low-pass filter passband of the system is 4MHz and the attenuation characteristic of high frequency is 12dp octave, the shooting distance with a filling factor of 25% will be attenuated by 1.15dp more than that with a filling factor of 50%, and the shooting distance needs to be increased by about 10%. Therefore, the higher the filling coefficient, the wider the viewing angle of the display screen and the more ideal color mixing effect; Therefore, it solves the dazzling problem and creates conditions for appropriately improving the brightness of the whole screen to obtain better results; And bring soft, beautiful, uniform, clear and delicate high-quality image quality.
2 The point spacing should be small
The point spacing is the distance between the LED electronic display screen and the pixel center point. The smaller the point spacing, the more pixels per unit area, the higher the resolution, and the closer the shooting distance; Therefore, in order to achieve excellent display effect, we must pay attention to the relationship between the resolution of signal source and point spacing, and strive to achieve consistent resolution, so as to achieve point-to-point display, so as to achieve the best display effect.
3 Adjustment state of color temperature
The color temperature is determined by comparing the emitter emission spectrum shape with the best fitted blackbody emission spectrum shape. For example, when the studio uses the LED electronic display screen as the background display screen, its color temperature should be consistent with the indoor light color temperature of the studio, so as to obtain accurate color reproduction in shooting; Therefore, as long as the LED electronic display screen is adjusted to the corresponding color temperature, a satisfactory shooting effect can be obtained.
As an integrated electronic product, LED electronic display screen is mainly composed of control board equipped with electronic components, light-emitting devices, switching power supply and other components; The stability and life of these components are closely related to their use environment. When the actual working temperature exceeds the specified service range of the product, it will not only shorten the service life, but also seriously damage the product itself. Moreover, if you work in a dusty environment, the deposition of dust will also affect the heat dissipation of electronic components, resulting in the temperature rise of components, resulting in the thermal stability decline and even leakage. In more serious cases, it will lead to the burning of equipment and huge economic losses. Therefore, the use environment should also be paid attention to "Top priority".
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