Pixel Structure Sensor Integration Luminous Efficiency
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Solution Overview
Problem
Current display panels face a reduction in luminous efficiency when sensor devices are integrated into the pixel structure, as it compresses the display region, affecting the aperture ratio and light-emitting area.
Innovation Solution
The integration of a micro light-emitting diode with a pixel driving circuit and a sensor device, where the sensor device comprises a first conductive layer, a silicon-rich material layer, and a second conductive layer stacked in sequence, and a compensation circuit structure, allowing for a smaller light-emitting diode area within the device accommodation portion, minimizing the impact on display region size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the sensor device is integrated into the pixel structure, then the sensor function is added without occupying extra region, but the display region size is compressed and luminous efficiency is affected
Solution Approach 1:
The patent positions the sensor device in the pixel sensor region beneath the pixel defining layer, utilizing the vertical dimension and substrate layer structure. This allows the sensor to be integrated without horizontally compressing the display region, as the sensor operates in a different spatial plane (below the pixel defining layer) while the display elements maintain their original horizontal footprint.
Solution Approach 2:
The pixel structure is segmented into distinct functional regions: the pixel sensor region containing the sensor device, and the pixel display region containing the light-emitting diode and pixel electrode. This segmentation allows independent optimization of each region, enabling sensor integration without compromising display area, as each region serves its specific function without interfering with the other's spatial requirements.
2Adaptability or versatility
If the sensor device is integrated into the pixel structure, then the sensor function is added, but the aperture ratio and light-emitting area are reduced
Solution Approach 1:
The sensor device is positioned in the vertical dimension beneath the pixel defining layer, allowing light to pass through the pixel defining layer to reach the sensor without being blocked by horizontal placement. This vertical arrangement preserves the horizontal light-emitting area and aperture ratio while enabling sensor functionality in the same pixel structure.
Solution Approach 2:
The sensor device is nested within the pixel structure by placing it between the substrate and the pixel defining layer. This nested configuration allows the sensor to be contained within the overall pixel footprint without expanding the horizontal boundaries, thereby maintaining the aperture ratio and light-emitting area while adding sensor functionality.
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 maintains high luminous efficiency even with the integration of a sensor device, as the smaller light-emitting diode area and efficient pixel structure design mitigate the compression of the pixel display region.
Implementation Method 1
a micro light-emitting diode, disposed on the device accommodation portion
Implementation Method 2
a sensor device adapted to sense light, disposed between the pixel defining layer and the substrate
Data Source
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AI summary
A pixel structure disposed on a substrate (10) having a pixel sensor region (SR) and a pixel display region (DR) disposed beside the pixel sensor region is provided. The pixel structure includes a pixel defining layer (110), a light-emitting diode (120), a pixel driving circuit and a sensor device. The pixel defining layer (110) is disposed on the substrate and has a device accommodation portion (112) located in the pixel display region. The light-emitting diode is disposed on the device accommodation portion. The area of the light-emitting diode is smaller than that of the device accommodation portion. The pixel driving circuit is disposed on the substrate, is electrically connected to the light-emitting diode, and includes a pixel electrode (132) by which the device accommodation portion is covered. The light-emitting diode is bonded onto the pixel electrode. The sensor device is disposed between the pixel defining layer and the substrate and located in the pixel sensor region.