Display Substrate Thermal Compensation for White Balance Stability
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Solution Overview
Problem
Existing on-board display devices experience white balance shifts due to significant differences in brightness decay rates among sub-pixels, leading to excessive luminance decay and color coordinate shifts.
Innovation Solution
A display substrate with a thermal compensation structure that provides varying amounts of heat to sub-pixels, with the first sub-pixel receiving more heat than the second, and the second receiving more than the third, to synchronize their brightness decay rates, and a heat insulating medium with reduced thermal conductivity to manage heat distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform heat distribution is provided to all sub-pixels, then manufacturing simplicity is maintained, but white balance shift occurs due to different brightness decay rates
Solution Approach 1:
The patent applies local quality by providing different amounts of heat to different sub-pixels based on their specific brightness decay characteristics. The thermal compensation structure is configured to generate unequal heat distribution, with each sub-pixel receiving heat proportional to its brightness decay rate, thereby achieving localized thermal compensation that maintains white balance stability.
Solution Approach 2:
The patent changes the thermal parameter (heat amount) for each sub-pixel individually. By adjusting the heat generation amount of each sub-pixel's thermal compensation structure according to its brightness decay rate, the system dynamically compensates for luminance decay differences, transforming a uniform heat distribution approach into a parameterized, sub-pixel-specific thermal management strategy.
2Reliability
If more heat is provided to sub-pixels with lower brightness decay rates, then brightness decay synchronization is achieved, but energy consumption increases
Solution Approach 1:
The patent applies partial action by providing heat only to the extent necessary for compensation. Each sub-pixel receives heat proportional to its brightness decay rate, not uniform heat. This partial thermal compensation approach achieves brightness decay synchronization while minimizing unnecessary energy consumption that would occur with uniform or excessive heat distribution to all sub-pixels.
3Reliability
If thermal compensation structure provides unequal heat to sub-pixels, then white balance stability improves, but device complexity increases
Solution Approach 1:
The patent merges the thermal compensation function with the existing display structure by integrating the thermal compensation structure into the pixel unit design. The thermal compensation structures are formed as part of the pixel electrode assembly, combining multiple functions (electrode function and heat generation function) into a single integrated structure, thereby reducing overall device complexity despite the unequal heat distribution requirement.
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 reduces the white balance shift and extends the lifetime of the display by aligning the brightness decay rates of sub-pixels, thereby improving color stability and longevity.
Implementation Method 1
a thermal compensation structure for providing heat
Implementation Method 2
a heat insulating medium with reduced thermal conductivity to manage heat distribution
Data Source
AI summary
The present disclosure provides a display device and a display substrate. The display substrate may include a substrate, a plurality of pixel units and a thermal compensation structure. The plurality of pixel units are arranged on a side of the substrate. Each of the pixel units includes a plurality of sub-pixels, and the plurality of sub-pixels include a first sub-pixel and a second sub-pixel. A brightness decay rate of the first sub-pixel is less than that of the second sub-pixel. A thermal compensation structure is configured to provide heat. Heat provided by the thermal compensation structure for the first sub-pixel is greater than that provided by the thermal compensation structure for the second sub-pixel. The heat provided by the thermal compensation structure for the second sub-pixel is greater than or equal to zero.