Pixel Circuit Layout for LED Luminous Efficiency Compensation
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Solution Overview
Problem
Micro and Mini LEDs of different colors exhibit varying luminous efficiency due to differences in light-emitting materials, leading to color shift and luminance drop at different temperatures, particularly at high temperatures like 85°C, affecting the display performance.
Innovation Solution
The display panel incorporates different pixel circuit layouts to drive LEDs in distinct control manners, allowing for varying light emission durations to compensate for the differences in luminous efficiency across different LEDs, thereby improving display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If different light-emitting materials are used for LEDs of different colors, then color display capability is improved, but luminous efficiency varies and causes color shift and luminance drop at high temperatures
Solution Approach 1:
The patent implements dynamic control of light emission duration for different colored LEDs through separate control modules. The first light-emitting control module controls the first light-emitting device, while the second light-emitting control module controls the second light-emitting device. This allows the light emission duration to be dynamically adjusted based on the luminous efficiency characteristics of each color, compensating for efficiency differences and maintaining stable display performance at high temperatures.
Solution Approach 2:
The patent applies different control strategies to different light-emitting devices based on their specific color and luminous efficiency characteristics. By providing separate control modules for different colored LEDs, the system tailors the light emission duration to the local requirements of each device, thereby compensating for variations in luminous efficiency across different colors while maintaining overall display quality.
2Ease of manufacture
If uniform pixel circuit structure is used for all LEDs, then manufacturing simplicity is maintained, but inability to compensate for luminous efficiency differences leads to color shift and luminance drop
Solution Approach 1:
The patent segments the pixel circuit into distinct control modules for different light-emitting devices. The first pixel circuit includes a first light-emitting control module, while the second pixel circuit includes a second light-emitting control module. This segmentation allows independent control of light emission duration for each color, enabling compensation for luminous efficiency differences while maintaining a standardized overall pixel circuit architecture that facilitates manufacturing.
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 ensures that light-emitting devices achieve appropriate light emission durations, compensating for efficiency differences and reducing color shift and luminance drops, thereby enhancing the overall display performance.
Implementation Method 1
a first light-emitting device LD1 and a second light-emitting device LD2 respectively corresponding to the first pixel circuit and the second pixel circuit
Data Source
AI summary
Display panel and display apparatus are provided. Display panel includes pixel circuits and light-emitting devices. Pixel circuits includes drive transistor, first light-emitting control module, and second light-emitting control module. One of first light-emitting control module and second light-emitting control module is connected between first power terminal and first electrode of drive transistor, the other is connected between second electrode of drive transistor and light-emitting device. At least one of first light-emitting control module and second light-emitting control module in first pixel circuit is connected to drive transistor through bridge line. At least one of first light-emitting control module and second light-emitting control module in second pixel circuit is directly connected to drive transistor. By reasonably arranging two light-emitting control modules in pixel circuits, the disclosure can make light-emitting control modules in two pixel circuits receive control signal in different manners, and meet requirements on line connection in pixel circuits.