Series-Connected OLED Subpixels for Under-Screen Sensor Lifespan
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Solution Overview
Problem
Current display panels with under-screen optical sensors have low pixel arrangement density in the optical sensor placement region, leading to decreased pixel lifespan and increased power consumption when brightness is adjusted to match the normal display region.
Innovation Solution
Incorporating subpixels with at least two light-emitting layers connected in series in the light-transmitting display region, which reduces the driving voltage required and minimizes heat and current-related losses, thereby increasing subpixel lifespan and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the optical sensor placement region is adjusted to be consistent with the normal display region, then the brightness uniformity is improved, but the pixel lifespan is decreased and power consumption is increased
Solution Approach 1:
The display panel is divided into two distinct regions: a normal display region with first pixel units and a light-transmitting display region with second pixel units. Each region uses different pixel structures optimized for its specific function, allowing the light-transmitting region to operate with lower current and voltage requirements while maintaining appropriate brightness levels.
Solution Approach 2:
Different pixel structures are applied to different regions of the display panel. The second pixel units in the light-transmitting display region use at least two light-emitting layers connected in series, creating locally optimized electrical characteristics that reduce current consumption and heat generation in the optical sensor placement region.
2Illumination intensity
If the brightness of the optical sensor placement region is adjusted to be consistent with the normal display region, then the brightness uniformity is improved, but the power consumption is increased
Solution Approach 1:
The display panel is divided into two distinct regions: a normal display region with first pixel units and a light-transmitting display region with second pixel units. Each region uses different pixel structures optimized for its specific function, allowing the light-transmitting region to operate with lower current and voltage requirements while maintaining appropriate brightness levels.
Solution Approach 2:
The electrical parameters (voltage and current) are changed by connecting at least two light-emitting layers in series in the second pixel units. This series connection increases the operating voltage while reducing the current required, thereby lowering power consumption (P=IV) while maintaining the necessary brightness output.
3Duration of action of moving object
If at least two light-emitting layers are connected in series in the second pixel unit, then the subpixel lifespan is increased and power consumption is reduced, but the driving voltage requirement increases
Solution Approach 1:
The electrical parameters (voltage and current) are changed by connecting at least two light-emitting layers in series in the second pixel units. This series connection increases the operating voltage while reducing the current required, thereby lowering power consumption (P=IV) while maintaining the necessary brightness output.
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 configuration enhances the lifespan of subpixels in the optical sensor placement region and decreases power consumption while maintaining consistent brightness and color purity across the display panel.
Implementation Method 1
At least one subpixel of the first subpixel, the second subpixel, and the third subpixel includes at least two light-emitting layers connected in series
Data Source
AI summary
The present application provides a display panel and a display device. the display panel includes a display region and a light-transmitting display region. The display region includes a first pixel unit. The light-transmitting display region includes a second pixel unit. The second pixel unit includes a first subpixel, a second subpixel, and a third subpixel. At least one subpixel of the first subpixel, the second subpixel, and the third subpixel includes at least two light-emitting layers connected in series. The display panel and the display device provided by the present application can increase a lifespan of the subpixel in the light-transmitting display region and reduce a power consumption of the display panel and the display device.