LED display brightness adjustment method and system

A technology for LED display and brightness adjustment, applied in static indicators, instruments, etc., can solve the problem of not being able to meet the requirements of 256-level grayscale scanning time length, and achieve the effect of achieving brightness consistency, reducing sacrifice, and achieving adjustment.

Active Publication Date: 2017-02-22
GUANGDONG VTRON TECH CO LTD
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AI Technical Summary

Problems solved by technology

Due to the requirement of brightness uniformity, it is necessary to reduce the brightness of an LED lamp, and the method of using pulse width to adjust the brightness is to reduce the current duty cycle, then the current duty cycle must be less than 0.6Ts to achieve the brightness requirement, at this time The t cannot meet the time length requirements of 256-level grayscale scanning, and needs to be compressed
That is, this method of pulse width adjustment brightness will sacrifice a certain gray scale effect, especially when the current pulse width adjustment range is large

Method used

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  • LED display brightness adjustment method and system
  • LED display brightness adjustment method and system

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Embodiment Construction

[0026] In order to understand more clearly the technical problems to be solved, the adopted technical solutions and the achieved technical effects of the present invention, the specific implementation of the LED display brightness adjustment system of the present invention will be introduced in detail below with reference to the accompanying drawings. It should be noted that the words first, second, etc. in the text are only used to distinguish devices of the same type in different circuits, and do not limit the order and number of devices.

[0027] Such as figure 1 As shown, a LED display brightness adjustment system includes a connected constant current drive circuit 200, a data acquisition and processing circuit 100, wherein the constant current drive circuit 200 includes a connected reference current generation circuit 210, a reference reference current generation circuit 220;

[0028] The reference current generation circuit 210 generates a reference current according to...

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Abstract

A method and system for adjusting the brightness of an LED display screen. The current corresponding to each point is determined through the brightness of each point, and the reference reference current corresponding to each point is determined according to the current corresponding to each point, so that the LED is displayed according to the reference reference current corresponding to each point. to adjust the brightness of the screen. That is, the current output peak value of the constant current drive circuit can be adjusted, and its adjustment reference value is set by an external resistor, not limited to the external resistor. The overall brightness adjustment of the display screen tends to rely on the selected standard brightness that meets the display screen requirements. It does not reduce the overall brightness of the display screen; it does not need to rely on current pulse width adjustment independently, which reduces the sacrifice of gray scale, that is, realizes the LED display screen under the condition of sacrificing a small gray scale and avoiding the reduction of display brightness. Adjustment of brightness consistency.

Description

technical field [0001] The invention relates to the technical field of LED display screens, in particular to a method for adjusting the brightness of an LED display screen and a system for adjusting the brightness of an LED display screen. Background technique [0002] The current full-color LED (Light-Emitting Diode, light-emitting diode) display screen adopts a dedicated constant current driver IC (integrated circuit, integrated circuit) for display. Under the existing LED manufacturing process, the luminance of each LED device is often inconsistent, so the brightness of the assembled display screen is also inconsistent. The existing LED display brightness correction method is to adjust the luminance of the LED device by adjusting the current pulse width, so that the brightness of the LED display can be consistent. However, there are two deficiencies in this correction method for adjusting the current pulse width: [0003] First, limited by the fact that the external res...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/32
Inventor 陈景创
Owner GUANGDONG VTRON TECH CO LTD
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