Micro-LED Display Panel Layout for Under-Display Camera Integration
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices are structurally complex and limited in achieving thin thickness, high contrast ratio, brightness, and viewing angle due to their requirement of a backlight unit and liquid crystal layer, whereas self-light-emitting displays with inorganic micro-LEDs offer improved efficiency and durability but face challenges in integrating an under-display camera (UDC) function without compromising resolution.
Innovation Solution
A display module with a back plate featuring a transparent substrate, pixel circuit layer, and inorganic light emitting elements, where transparent regions are strategically placed between pixel apertures to allow external light to reach an image sensor, enabling UDC functionality while maintaining the display's resolution and structural simplicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If transparent regions are added to integrate an under-display camera, then the camera function is enabled, but the manufacturing complexity increases
Solution Approach 1:
The display panel is segmented into pixel regions and transparent regions, where transparent regions are specifically positioned between pixel apertures to allow light transmission for the under-display camera while maintaining display functionality in pixel areas
Solution Approach 2:
The transparent regions serve multiple functions: they allow light transmission for the under-display camera, maintains structural integrity of the display panel, and do not interfere with pixel operation, enabling the display to function both as a display and support camera operations
2Illumination intensity
If transparent regions are placed between pixel apertures, then light transmission for image sensor is achieved, but the area for light transmission is limited
Solution Approach 1:
Different regions of the display panel have different optical properties: pixel regions are opaque to emit display light, while transparent regions between pixels allow external light transmission, creating local quality variations that satisfy both display and camera requirements
Solution Approach 2:
The solution moves from considering only the horizontal/vertical pixel arrangement to utilizing the spatial dimension between pixels, placing transparent regions in the interstitial spaces between pixel apertures to maximize light transmission area without affecting pixel layout
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
The solution allows for the realization of an under-display camera function in self-light-emitting displays, enhancing their design flexibility and performance by maintaining resolution and luminance while integrating an image sensor without the need for additional components, thus overcoming the limitations of traditional LCDs.
Implementation Method 1
a plurality of inorganic light emitting elements provided on the back plate
Implementation Method 2
each transparent region of the plurality of transparent regions is configured to allow external light to be incident on the image sensor
Data Source
AI summary
A display module includes: a plurality of pixels arranged in two dimensions; a display panel including: a back plate including: a transparent substrate; a pixel circuit layer; and a plurality of power electrode layers provided on the transparent substrate; and a plurality of inorganic light emitting elements provided on the back plate; and an image sensor provided on the rear of the display panel, wherein each of the plurality of pixels includes two or more inorganic light emitting elements among the plurality of inorganic light emitting elements, the display panel includes a plurality of transparent regions in a region corresponding to a position of the image sensor, and each transparent region of the plurality of transparent regions is configured to allow external light to be incident on the image sensor.