Display Panel Temperature Detection for High-Temperature Color Compensation
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Solution Overview
Problem
Display panels suffer from color deviation and uneven chromaticity distribution at high temperatures due to variations in brightness and chromaticity of red, green, and blue light-emitting devices, and uneven temperature distribution.
Innovation Solution
Incorporating a temperature detection structure connected to connection electrodes to detect temperatures at light-emitting device positions, allowing for targeted color luminance compensation based on temperature characteristics to maintain color luminance specifications across varying temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If temperature detection structure is added to enable targeted color luminance compensation, then color deviation and chromaticity unevenness are reduced, but device complexity increases
Solution Approach 1:
A temperature detection structure is introduced as an intermediary component between the light-emitting devices and the control system. This structure includes temperature sensing elements positioned near the light-emitting devices, connected to connection electrodes that transmit temperature signals to a control circuit. The control circuit uses these temperature signals to adjust drive currents and compensate for color shifts, thereby resolving the color deviation problem without requiring direct modification of the light-emitting devices themselves.
Solution Approach 2:
The patent implements a feedback mechanism where temperature detection structures continuously monitor the temperature of light-emitting devices, and the control circuit receives these temperature signals to dynamically adjust drive currents. This closed-loop feedback system enables real-time compensation for temperature-induced color changes, ensuring color luminance specifications are maintained across varying operating conditions. The feedback loop includes: temperature sensing → signal transmission via connection electrodes → control circuit processing → drive current adjustment → color compensation.
2Reliability
If temperature detection structure is incorporated to detect temperatures at light-emitting device positions, then color deviation is reduced, but ease of manufacture decreases
Solution Approach 1:
The temperature detection structure is merged with the existing electrode structure of the display panel. The connection electrodes that were originally designed for other purposes are utilized to also transmit temperature detection signals from the temperature sensing elements to the control circuit. This merging approach allows the temperature detection function to be integrated into the existing manufacturing process without requiring completely new manufacturing steps, thereby reducing the impact on manufacturing ease while still achieving reliable temperature monitoring and color consistency.
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
The solution effectively reduces color deviation and chromaticity unevenness by adjusting the luminance of light-emitting devices, ensuring consistent display performance across temperature variations.
Implementation Method 1
the temperature detection structure is provided in the display apparatus, so that the temperature detection structure can be used to detect temperatures at positions where light-emitting devices are located
Data Source
AI summary
A display panel and a display apparatus. The display panel comprises a temperature detection structure, a first connection electrode, and a second connection electrode, where the temperature detection structure is connected to the first connection electrode and the second connection electrode, respectively. In the embodiments of the present application, the temperature detection structure is provided in the display apparatus, so that the temperature detection structure can be used to detect temperatures at positions where light-emitting devices are located, and perform targeted color luminance compensation for the light-emitting devices with different light-emitting colors based on the detected temperatures and the temperature characteristics of the light-emitting devices, which is conducive to making the color luminance of the display panel meet a specification requirement at different operating temperatures, and reducing the problem of color deviation that is prone to occur in the display panel at a high temperature.