Color Adjustment Device for Display Panel Blue Component Control
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Solution Overview
Problem
Current display technologies face challenges in maintaining image quality due to color variations caused by light source luminance issues, particularly when luminance is low, leading to discrepancies between actual and displayed colors.
Innovation Solution
A color adjustment device with two controllers is used to determine the blue component proportion and luminance threshold of an input image, transmitting pulse signals to control light emission in the display panel when the blue component proportion is high and luminance is low, thereby adjusting the control mode to direct current or pulse width modulation to minimize color variation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If current signals are used to adjust light sources, then the control is simple and direct, but color variation occurs when luminance is low causing image quality to deteriorate
Solution Approach 1:
The patent dynamically switches between DC control mode and PWM control mode based on luminance thresholds and blue component proportions. When luminance is low and blue component proportion is high, PWM mode is activated to prevent color variation; otherwise DC mode is used for simple control.
Solution Approach 2:
The patent changes the control parameter from simple current signals to pulse width modulation signals under specific conditions (low luminance + high blue component proportion). This parameter change allows precise control of light emission to maintain color accuracy without sacrificing ease of operation in normal conditions.
2Manufacturing precision
If PWM control is used to prevent color variation, then color precision is improved, but the control system complexity increases
Solution Approach 1:
The patent segments the control system into two distinct controllers: a first controller for DC control and a second controller for PWM control. This segmentation allows each controller to specialize in its control mode, reducing the complexity burden on a single controller while maintaining color precision when needed.
Solution Approach 2:
The system dynamically selects between DC and PWM control modes based on real-time conditions (luminance and blue component proportion). This dynamic approach ensures PWM complexity is only introduced when necessary for color accuracy, keeping the system simple during normal operation.
3Manufacturing precision
If blue component proportion is high and luminance is low, then color variation occurs, but increasing luminance may cause other display issues
Solution Approach 1:
The patent changes the control method from DC to PWM when blue component proportion exceeds a threshold and luminance is below a threshold. This parameter change enables precise control of blue light emission to maintain color accuracy without simply increasing overall luminance, which could cause other display issues.
Solution Approach 2:
The patent applies PWM control specifically to the blue component when its proportion is high and luminance is low, rather than uniformly adjusting all components. This localized approach maintains color accuracy for the problematic blue component without affecting overall luminance balance.
Data Source
AI summary
A color adjustment device applied to a display panel includes a first controller and a second controller. The first controller is configured to control light emission of the display panel. The second controller is connected to the first controller, and is configured to receive an input image, and determine whether a blue component proportion of the input image is greater than a preset proportion and whether luminance of the display panel is lower than a luminance threshold value, wherein at least one pulse signal is transmitted from the second controller to the first controller through a first signal line when the blue component proportion is greater than the preset proportion and the luminance of the display panel is lower than the luminance threshold value.