Display Panel With Circuit-Free Sensor-Transparent Emission Regions
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Solution Overview
Problem
Display devices with large and full screens face a low screen-to-body ratio due to components like cameras and light sensors being mounted on the front, which obstruct the display area and reduce the performance of photosensitive sensors.
Innovation Solution
A display panel design with a light-transmitting region containing only light-emitting devices and a non-light-transmitting region for pixel driving circuits, ensuring high light transmittance for photosensitive sensors while maintaining a high screen-to-body ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If components such as cameras and light sensors are mounted on the front of the display device, then the display device can incorporate functional components for user interaction and imaging, but the screen-to-body ratio is reduced and the performance of photosensitive sensors is degraded due to obstruction of display area and light path
Solution Approach 1:
The patent moves the pixel driving circuits from the front plane to the backplane of the display panel, utilizing the third dimension (depth) to resolve the conflict between component integration and screen-to-body ratio. By arranging circuits on the backplane and connecting them to front-plane light-emitting devices through vertical conductors, the design achieves high screen-to-body ratio while maintaining full functionality.
Solution Approach 2:
The display panel is segmented into distinct functional layers: the backplane contains pixel driving circuits and signal lines, while the front plane contains only light-emitting devices. This segmentation allows each layer to be optimized independently, with the backplane handling electronics and the front plane dedicated to light emission, thereby maximizing the screen-to-body ratio.
2Adaptability or versatility
If components are mounted on the front of the display device, then imaging functions are enabled, but the performance of photosensitive sensors is degraded due to obstruction of light path
Solution Approach 1:
The patent extracts the pixel driving circuits from the front plane where they would obstruct the light path to photosensitive sensors, and relocates them to the backplane. This extraction eliminates the obstruction problem while preserving the imaging function, as light can now reach sensors without passing through circuit components.
3Area of stationary object
If pixel driving circuits are arranged in the display area, then the display area can be fully utilized for light emission, but the light transmittance is reduced due to presence of non-light-transmitting circuits and signal lines
Solution Approach 1:
The patent resolves the conflict between display area utilization and light transmittance by moving pixel driving circuits to the backplane (third dimension). This allows the entire front-plane display area to be dedicated to light-emitting devices without obstruction from non-transparent circuits, thereby maximizing both area utilization and light transmittance simultaneously.
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
Enhances the performance of photosensitive sensors by allowing ambient light to reach them effectively, improving the quality of images captured by cameras and maintaining a high screen-to-body ratio.
Implementation Method 1
a plurality of first light-emitting devices 200 arranged in an array in the light-transmitting region 101a of the first display region 101
Data Source
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AI summary
A display panel (000) and a display device are provided. The display panel (000) includes: a substrate (100), and a plurality of first light-emitting devices (200), a plurality of first pixel driving circuits (300) and a plurality of first signal lines (400), which are disposed on the substrate (100). As only the first light-emitting devices (200) are disposed in a light-transmitting region (101a) of the substrate (100), the first pixel driving circuits (300) electrically connected with the first light-emitting devices (200) are disposed in a non-light-transmitting region, and the first signal lines (400) electrically connected with the first pixel driving circuits (300) are disposed outside the light-transmitting region (101a). The light transmittance of the light-transmitting region (101a) in the substrate (100) is relatively high. When the display panel (000) is integrated in the display device, it can be ensured that a photosensitive sensor (001) in the display device has a better performance in the case where the screen-to-body ratio of the display device is relatively high.