source:other news release time:2023-03-14 Hits: Popular:led screen wholesaler
1. Full -color LED display drive element
Driving components are generally constant -current driving chips, such as MBL5026. These chips contain 16 constant current drive outputs. The current output value can be set with a resistance. The error of each output of the same chip is controlled within 3%, and the output error of different chips is controlled within 6%.
2. Full -color LED display light element
The light emitting element is the LED luminous pipe, which is inevitable in the production process. However, the countermeasures adopted by the LED show that after the production is completed, the lower the brightness difference between the two adjacent gear, the better the consistency, but the lower the phenomenon of low finished product rate and high inventory. Therefore, the full -color LED display manufacturers control the brightness difference between the two adjacent gears to about 20%.
The brightness error of 25%between the pixels of the LED display is normal. If the LED luminous pipe used is not the same grade and type of product, the brightness error will be increased to more than 40%.
How to solve the color of the LED electronic display different color?
The first method: Use the visual inertia of the human eye, and use the pulse wide adjustment method to achieve grayscale control, that is, the periodic change of the light pulse width (ie, the duty ratio), as long as the repeated lighting cycle is short enough (that is, refresh the refresh The frequency is high enough), the human eye does not feel that the luminous pixel is shaking. Because the pulse width modulation is more suitable for digital control, today, which is generally used by microcomputers to provide and indoor LED display content, almost all full -color LED display screens use pulse width modulation to control the gray level.
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