Liquid Crystal Display Panel Local Brightness Control
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Solution Overview
Problem
High power consumption and temperature issues in liquid crystal display panels with high PPI and touch control functions lead to poor Gamma uniformity and increased heat, affecting display quality.
Innovation Solution
The liquid crystal display panel is divided into sub-areas with identical pixel electrodes having different brightness control parameters, such as varying angles and slit numbers, to adjust the electric field direction and magnitude, thereby improving Gamma uniformity and reducing temperature-related defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the number of pixels per inch is increased, then the display resolution is improved, but the transmittance deteriorates and power consumption increases
Solution Approach 1:
The patent applies local quality by setting different brightness control parameters for pixel electrodes in different sub-areas of the display panel. Specifically, pixel electrodes in sub-areas closer to the IC end have different parameters (such as different slit numbers or different angles) compared to those farther from the IC end, allowing each region to be optimized for its local temperature conditions while maintaining overall display quality
2Illumination intensity
If the LED current or number of LEDs is increased to improve brightness, then the illumination intensity is improved, but the power consumption increases and LED temperature rises
Solution Approach 1:
The patent changes parameters of the pixel electrodes (such as slit numbers, slit widths, or angles) to control brightness locally in different sub-areas. This allows the display to achieve required brightness levels without uniformly increasing LED current or number of LEDs, thereby avoiding excessive LED temperature rise and power consumption
3Productivity
If the power consumption of IC and LED is increased, then the display performance is improved, but the temperature of IC and LED rises excessively
Solution Approach 1:
The patent divides the display area into multiple sub-areas and applies different brightness control parameters to pixel electrodes in each sub-area. This local optimization allows the display to achieve high performance without uniformly increasing power consumption across the entire panel, thereby reducing temperature rise of IC and LED
4Temperature
If the panel heat dissipation effect is poor, then the temperature rise is acceptable, but the temperature difference across the panel increases and Gamma uniformity deteriorates
Solution Approach 1:
The patent addresses Gamma uniformity by setting different brightness control parameters for pixel electrodes in different sub-areas. Specifically, sub-areas with higher temperatures (typically closer to IC end) have parameters adjusted to compensate for temperature-induced Gamma shifts, while cooler sub-areas use different parameters, thereby achieving uniform Gamma across the entire panel despite temperature differences
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances display quality by optimizing Gamma uniformity and reducing ghosting effects, while also managing temperature differences across the panel.
Implementation Method 1
The brightness control parameters can influence an electric field direction or magnitude of an electric field force, and the electric field direction or the magnitude of the electric field force will influence a deflection angle of the liquid crystal
Implementation Method 2
the electric field direction or the magnitude of the electric field force will influence a deflection angle of the liquid crystal
Data Source
AI summary
The present disclosure relates to a liquid crystal display panel and a display device. The liquid crystal display panel includes a display area; and a non-display area surrounding the display area, wherein the display area includes a plurality of sub-areas, each of the plurality of sub-areas is provided with a plurality of pixel electrodes, all of the pixel electrodes in a sub-area have an identical brightness control parameter; and the brightness control parameter of the pixel electrodes in at least one sub-area is different from the brightness control parameter of the pixel electrodes in another sub-area. By setting different brightness control parameters based on different temperature rise in the sub-areas, the problem of poor Gamma uniformity of the display panel can be solved, and the possibility of occurrence of ghost can be reduced, thereby increasing display quality of the liquid crystal display panel.