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| How to identify the quality of LED display rental | ||||
With the wide application of LED display screen leasing in various fields, more and more people begin to understand and use LED electronic display screen. How to judge the quality of full-color LED display screen leasing, and then select suitable products with high cost performance? This requires us to grasp the basic technical indicators of LED electronic display screen leasing, first from the function and function of the display screen We can distinguish its quality level from its function.
First of all, from the perspective of the function of LED display rental, its basic function is to broadcast and display our various texts, pictures, videos and other information to more people. The most important point is the actual display of information, which requires LED electronic display to have ultra-high reducibility. How to improve its reducibility mainly depends on the following technical indicators .
1. Brightness
The concave and convex of brightness gives people a very intuitive feeling. You can distinguish the concave and convex at a glance. Don't think that the higher the brightness of LED display is, the better. It depends on your application environment and viewing interval. Indoor LED electronic display is usually about 1000nit, outdoor LED display is higher than 6000nit, and semi outdoor LED display is between 2500 and 5000nit, The brightness of small distance display screen is lower, about 100 to 300 nit. In a word, on the premise of satisfying the audience to see the picture in different environment, long-term viewing will not cause tingling feeling.
2. Color temperature
When we see that the picture color on the display is inconsistent with or different from the data, our picture will be severely distorted, which is related to the color temperature of the white balance of the LED display. If the human eye directly watches the display, the color temperature of the white balance is between 6500 and 8000K, which is suitable for comparison. If it is the display used by the TV station, the actual color temperature of the screen needs to be adjusted to 5500 K, so after the camera recording and broadcasting, the picture on the display screen is real.
3. Perspective
As for the rental perspective of LED display, the larger the perspective, the better, and the larger the viewing scale. The viewing angle of the display screen can be divided into horizontal viewing angle and straight viewing angle. Now the horizontal viewing angle of indoor full-color screen can be greater than 140 degrees and the straight viewing angle is greater than 100 degrees, while the horizontal viewing angle of outdoor full-color screen is greater than 100 degrees and the straight viewing angle is greater than 90 degrees. On the basis that the scale connotation of the perspective can clearly and perfectly view the picture, different perspectives can not present the scene of color deviation, which is mainly related to the RGB chip packaging and placement method of LED lamps. Now there are two placement methods in the market, namely, the font type and the straight type, and their functions are compared as shown in the figure below:
How to identify the quality level of LED display rental
4. Grayscale
When the picture on the LED electronic display has a poor sense of hierarchy, and compared with the data, it shows that the gray level of the screen is low, which can not present the data content perfectly and clearly. Its professional test method is the gray bar test, which can directly see the concave and convex of the gray level. Now the professional can achieve the gray level of 16bit, and then it will reach 18bit
5. Refresh rate
When the human eye directly looks at the LED display screen, it can feel that the screen has a shining scene. When the camera or video camera takes photos, it presents many horizontal dark lines, which indicates that the refresh rate of the screen is low. The refresh rate of the display screen can not be lower than 300Hz without affecting the direct viewing of human eyes, and the refresh rate of the display screen needs to reach above 2000Hz to satisfy the request of camera and other camera equipment
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