As the saying goes, the insiders look at the doorway, and the layman looks at the excitement. The dazzling LED display screen allows the audience to linger, so how should we tell the difference between the LED display? On the occasion of the 3.15 coming, the reporter combined with the secrets of the manufacturers at the Guangzhou LED show, summed up a selection of quality. Led display strategy.
From the performance parameters, the so-called good led display also refers to the display with high gray level, high refresh rate, high utilization and other characteristics. Here are some specific features of the led display:
The gray scale of the led display is also called the gradation or gray scale, which refers to the brightness of the brightness. For LED digitized display technology, grayscale is the determining factor in the number of colors displayed. In general, the higher the gray level, the richer the displayed color, the finer the picture, and the more detailed the details.
The high refresh rate means that the electron beam repeatedly scans the image on the screen a higher number of times. The higher the refresh rate, the better the stability of the displayed image (picture). The refresh rate will directly determine its price, but since the refresh rate and resolution are mutually constrained, only displays that achieve a high refresh rate at high resolution can be called excellent performance. At present, the refresh rate of ordinary LED display screens on the market is about 800 to 1500 hz, and the high refresh rate is over 4000 hz.
Led high utilization means that the required brightness can be achieved without using the power supply led, and the energy consumption of the led display can also be reduced. At the 10th Guangzhou International LED Exhibition, the company displayed different shapes of led display screens, including ball-shaped led display, column type led display, arc type and angle type led display, in space utilization and The presentation will be more efficient, which means that the scope of application is more extensive.
From the perspective of visual effects, the choice of a good led display can start from the following three aspects:
1, white balance effect. The white balance effect is one of the most important indicators of the display. In color theory, when the ratio of red, green and blue primary colors is 1:4.6:0.6, pure white will be displayed. If there is a slight deviation in the actual ratio, white balance will appear. Generally, it should be noted whether white is blue or yellow. Green phenomenon. The quality of the white balance is mainly determined by the control system of the display, and the die also has an effect on the color reproduction.
2, brightness and viewing angle. The brightness of the indoor full color screen should be above 800cd/m2, and the brightness of the outdoor full color screen should be above 1500cd/m2 to ensure the normal operation of the display. Otherwise, the displayed image will not be seen because the brightness is too low. The brightness is mainly determined by the quality of the led die.
3. The flatness of the surface of the display should be within ±1mm to ensure that the displayed image is not distorted. Local bumps or recesses may cause the viewing angle of the display to appear dead angle. The quality of the flatness is mainly determined by the production process.
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