Transparent Light Source in Via Hole for Under-Display Camera
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Solution Overview
Problem
Current display technologies, such as those with notches, water drop displays, or hole displays, face challenges in achieving high display ratios due to the placement of cameras and lighting devices, which compromise display space and user experience, especially in terminal equipment like mobile phones.
Innovation Solution
A display device design featuring a camera inserted into a via hole within an optical film, with a transparent light source located between the camera and a transparent area of the display panel, allowing for a seamless integration of imaging and display functions while maintaining a high display ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a notch, water drop display, or hole display is used to increase display ratio, then the display ratio is improved, but the camera and lighting devices are directly exposed on the display, sacrificing display space and affecting user experience
Solution Approach 1:
The camera is nested within the via hole formed in the optical film, and the transparent light source is positioned between the camera and the display panel. This nesting arrangement allows the camera to be housed within the display structure rather than protruding from it, maintaining full display coverage while enabling camera functionality.
Solution Approach 2:
The solution transitions from a planar display surface to a three-dimensional structure by forming a via hole through the optical film. This vertical dimension allows the camera to be positioned beneath the display surface while the transparent light source illuminates from below, achieving full display coverage without sacrificing camera placement.
2Area of stationary object
If the camera is disposed at an edge or corner of the imaging area to enable under-display placement, then the display area is increased, but the area with no pixel unit or light source cannot be used to display images, affecting user experience
Solution Approach 1:
The optical film is designed with a localized via hole at a specific position, creating a localized transparent area in the display panel opposite to the via hole. This localized modification allows the camera to be positioned within the imaging area while maintaining pixel units and light sources across the entire display surface, including the camera region, thereby preserving full display functionality and user experience.
3Productivity
If lifting cameras or sliders are added to achieve full display, then the display ratio is improved, but additional modules are added and device thickness increases, degrading consumer experience
Solution Approach 1:
The camera is nested within the via hole formed in the optical film, eliminating the need for lifting mechanisms or sliding structures. This nested arrangement integrates the camera within the existing display thickness, avoiding additional modules and maintaining a sleek device profile.
Solution Approach 2:
The optical film serves dual functions as both the display component and the structural element housing the via hole for the camera. The transparent light source is integrated within the same structure, merging multiple functions into a single integrated component rather than adding separate lifting or sliding modules.
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
This solution enhances the display ratio by enabling the camera to function in a lighting state without compromising the display area, improving user experience through a full display implementation.
Implementation Method 1
The OLED belongs to a current-type organic light-emitting device, which emits light through carrier injection and recombination. Under action of the electric field in the OLEDs, the holes generated by the anode and the electrons generated by the cathode can move, and are injected into the hole transport layer and the electron transport layer, and then migrated to the light-emitting layer. When the holes and the electrons are combined in the light-emitting layer, energy excitons are generated, thereby exciting the light-emitting molecules to generate visible light.
Implementation Method 2
The transparent area comprises a first transparent part located in the first polarizer; a second transparent part located in the color film substrate; a third transparent part located in the liquid crystal layer; a fourth transparent part located in the array substrate; and a fifth transparent part located in the second polarizer
Data Source
AI summary
A display device includes an optical film having a via hole; a display panel disposed on a surface of a side of the optical film, and the display panel comprises a transparent area opposite to the via hole; a camera inserted into the via hole and facing the transparent area; and a transparent light source located within the via hole and between the camera and the transparent area.