Integrated Display Panel Photodiode Thickness Reduction
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Solution Overview
Problem
The thickness of display devices is increased by incorporating a separate front camera, which hinders the development of ultra-thin display devices.
Innovation Solution
An integrated display panel is designed with a first and second base substrate, where a pixel unit comprising sub-pixel units with photodiodes is formed, allowing the photodiode to convert light into an electric signal for image acquisition, thereby reducing the overall thickness by integrating the camera functionality within the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate front camera is installed in the display device, then the photo sensing function is achieved, but the thickness of the entire display device is increased
Solution Approach 1:
The patent merges the front camera's photo sensing function with the display panel by integrating photodiodes into the non-display regions of the display panel. The photodiodes are formed in the same manufacturing process as the display pixels, combining two separate functions (display and photo sensing) into a single integrated structure, thereby eliminating the need for a separate front camera module and reducing overall thickness.
Solution Approach 2:
The display panel is designed to serve multiple functions: it acts as both a display device and a photo sensing device. The photodiodes integrated into the non-display regions enable the display panel to perform photo sensing operations, making the display panel a multi-functional component that replaces both the display panel and the separate front camera.
2Reliability
If individual parts of the front camera are assembled together as a separate component, then the photo sensing unit is functional, but the thickness of the display device is inevitably increased
Solution Approach 1:
The patent combines the photodiode formation process with the display pixel manufacturing process. Both the display pixels and photodiodes are formed using the same thin-film transistor fabrication steps on the same substrate, merging two separate component manufacturing processes into one integrated process, thereby eliminating the need for separate assembly and reducing thickness.
Solution Approach 2:
The photodiodes are positioned in the non-display regions of the display panel, utilizing the lateral space (horizontal dimension) rather than adding thickness in the vertical dimension. This spatial arrangement allows photo sensing functionality to be achieved without increasing the overall thickness of the display device.
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 integrated display panel achieves a reduced thickness, enabling the development of ultra-thin display devices while providing both display and photographing functions, enhancing integration and usability.
Implementation Method 1
the photodiode is configured to photoelectrically convert light from a target area to obtain an electric signal representing an image of the target area
Data Source
AI summary
An integrated display panel and a preparation method thereof are provided. The integrated display panel includes a first base substrate and a second base substrate, the first base substrate and the second base substrate being disposed opposite to each other, the first base substrate being provided with a pixel unit thereon, the pixel unit including a plurality of sub-pixel units having different colors; the integrated display panel further includes an image acquisition module which includes a photo sensing unit disposed in each of the sub-pixel units, the photo sensing unit includes a photodiode disposed in a non-display region of the sub-pixel unit, the photodiode is configured to photoelectrically convert light from a target area to obtain an electric signal representing an image of the target area.