OLED Display Panel Under-Screen Camera Region Pixel Density
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Solution Overview
Problem
Current OLED display devices with notch or hole screens cannot achieve a true full-screen display due to the camera region being separate from the display region, limiting the screen-body ratio and aesthetic improvements.
Innovation Solution
An OLED display panel with an under-screen camera region having a lower pixel density than the normal display region, featuring crisscrossed signal lines with closer intervals and auxiliary metal lines covered by a black light-shielding layer, allowing for sufficient light transmittance and image display within the camera region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the pixel density is reduced in the camera region to enable light transmittance for under-screen camera, then the light transmittance is improved, but the display resolution in that region deteriorates
Solution Approach 1:
The display panel employs different pixel densities in different regions: the camera region uses a first pixel density optimized for light transmittance, while the surrounding region uses a second pixel density optimized for display quality. This local differentiation allows each region to have optimal characteristics for its specific function.
Solution Approach 2:
The display region is divided into two distinct segments: an under-screen camera display region with lower pixel density and a normal display region with higher pixel density. This segmentation allows the camera region to transmit sufficient light while the normal region maintains high display resolution.
2Illumination intensity
If the pixel density is reduced in the camera region, then the light transmittance is improved, but the pixel quantity in that region decreases
Solution Approach 1:
Different regions of the display panel are assigned different pixel densities according to their functional requirements. The camera region has reduced pixel density to maximize light transmittance, while the normal region maintains high pixel density for quality display.
Solution Approach 2:
The display area is segmented into an under-screen camera display region and a normal display region, with each segment having optimized pixel density. This allows the camera region to have fewer pixels for better light transmission while the normal region compensates with higher pixel density.
3Area of stationary object
If the signal line interval is reduced in the camera region to maintain display functionality, then the display coverage is improved, but the signal line density increases causing interference
Solution Approach 1:
The signal line configuration is optimized locally for the camera region: signal lines are arranged with smaller intervals to maintain display coverage, while auxiliary metal lines are strategically positioned to shield and reduce electromagnetic interference in this specific region.
Solution Approach 2:
Auxiliary metal lines are introduced as intermediary elements between the signal lines in the camera region. These auxiliary lines act as shields to reduce electromagnetic interference, allowing the signal lines to be closer together without causing excessive interference.
4Area of stationary object
If the bezel width is reduced to increase screen-body ratio, then the aesthetic appearance is improved, but the placement space for front camera and photosensitive device is reduced
Solution Approach 1:
The front camera and photosensitive device are merged with the display region by implementing an under-screen camera structure. The camera components are positioned beneath the display panel in the camera region, allowing the display to extend to the edges while accommodating camera functionality.
Solution Approach 2:
The camera components are moved from the traditional lateral placement (in the bezel area) to a vertical placement (under the display panel). This dimensional change allows the display to achieve full-screen coverage while the camera components are accommodated in the depth dimension beneath the display.
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
Enables an under-screen camera and true full-screen display by reducing pixel density in the camera region, enhancing light transmittance and maintaining image quality without compromising display functionality.
Implementation Method 1
a black light-shielding layer covering each of the auxiliary metal lines
Implementation Method 2
The electrons and the holes meet in the light emitting layer to form excitons, and excite the light emitting molecules, which emit visible light after radiation release
Data Source
AI summary
An organic light emitting diode (OLED) display panel and an electronic device are provided. The OLED display includes an under-screen camera display region and a normal display region surrounding the under-screen camera display region. A pixel density of the under-screen camera display region is less than a pixel density of the normal display region. By lowering the pixel density of the under-screen camera display region, and thereby raising a light transmittance of the under-screen camera display region, an under-screen camera and a true full screen display are realized.