Display Panel Photosensitive Region Layout for Screen-to-Body Ratio
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Solution Overview
Problem
Existing display technologies face challenges in increasing the screen-to-body ratio of devices like mobile phones and tablets due to the need for space reservation for electronic photosensitive devices, such as front cameras and infrared sensors, which reduces the display area and requires complex manufacturing processes to achieve high transmittance in semi-transparent regions for both display and photography functions.
Innovation Solution
A display panel design with a first display region partially surrounding a second display region, which includes semi-transparent regions and a spacing region, where pixel driving circuits are strategically located in the first display region and spacing region to avoid reducing transmittance, allowing for improved light transmission and photography quality by reducing wiring density and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If photosensitive devices are arranged on the front of the display device, then the display function is achieved, but the screen-to-body ratio is reduced due to non-display regions
Solution Approach 1:
The patent moves photosensitive devices from the front surface (2D arrangement) to the back surface of the display panel, utilizing the third dimension (depth) to resolve the conflict between display functionality and screen-to-body ratio. This allows the front surface to be fully utilized for display without obstruction from camera modules or sensors.
Solution Approach 2:
The patent integrates photosensitive devices within the display panel structure itself, nesting them in the backlight module or between display layers. This embedding approach allows photosensitive components to coexist with display elements in the same spatial volume, maximizing the use of available space while maintaining full display area.
2Area of stationary object
If a semi-transparent region is used for both display and photography, then the screen-to-body ratio is improved, but the manufacturing process becomes complex to achieve high transmittance
Solution Approach 1:
The patent extracts the photosensitive devices from the display region and places them in dedicated areas on the back surface. This separation eliminates the need for complex semi-transparent regions, allowing the display layer to be fully opaque and simplifying the manufacturing process while maintaining high screen-to-body ratio.
Solution Approach 2:
The patent divides the display panel into distinct functional regions: a full display region on the front surface and dedicated photosensitive device regions on the back surface. This segmentation allows each region to be optimized independently with standard manufacturing processes, avoiding the complexity of creating semi-transparent display areas.
3Illumination intensity
If pixel driving circuits are placed in the spacing region to avoid reducing transmittance, then the light transmission is improved, but the wiring density and crosstalk increase
Solution Approach 1:
The patent routes signal lead wires along the edges of the display region in the first direction, utilizing the peripheral space rather than the central spacing region. This edge-routing approach reduces wiring density in the photo-sensitive areas and minimizes crosstalk while maintaining high light transmittance through the spacing region.
Data Source
AI summary
A display panel includes a display region and a non-display region. The display region includes a first display region and at least one second display region. The first display region at least partially surrounds the at least one second display region. Each second display region of the at least one second display region includes at least two photosensitive device setting regions and a spacing region disposed between the at least two adjacent photosensitive device setting regions. The display region is provided with a plurality of sub-pixels and pixel driving circuits electrically connected to the plurality of sub-pixels. The pixel driving circuits corresponding to the plurality of sub-pixels in the spacing region are electrically connected to the pixel driving circuits located in the first display region through signal lead wires. The signal lead wires are arranged on both sides of sub-pixel rows along a first direction.