Under-Display Camera LCD Layout With Light-Transmissive Backlight Zone
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Solution Overview
Problem
Existing display devices face challenges in implementing full-screen displays due to the presence of cameras or sensors on the front surface, which limit screen design and size, and result in notched areas that obstruct image display.
Innovation Solution
A display device design that includes a camera under the display panel, utilizing a light-transmissive area with a second backlight and no color filter, allowing for a full-screen display by securing a light path to and from the camera, and enhancing luminance uniformity through optical sheet patterning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the camera is disposed in the front surface of the display device, then the camera function is integrated, but the screen design and screen size are limited, resulting in notched areas that prevent full-screen display
Solution Approach 1:
The camera is relocated from the front surface (2D plane) to the rear surface of the display device, utilizing the third dimension (depth/vertical space) to resolve the conflict between camera integration and full-screen display. This dimensional transition allows the camera to be positioned below the display panel without occupying front surface area, enabling true full-screen display while maintaining camera functionality.
Solution Approach 2:
Instead of placing the camera on the conventional front surface of the display device, the invention inverts the placement by positioning the camera on the rear surface. This inversion resolves the technical contradiction by allowing the camera to function without creating notched areas or limiting the front display area.
2Reliability
If a light-transmissive area is created for the camera, then the light path is secured, but the resolution of the light-transmissive area needs to be increased
Solution Approach 1:
The display area is segmented into a first area (surrounding) and a second area (center), with the light-transmissive area specifically positioned within the second area. This segmentation allows optimized light transmission in the camera region while maintaining display functionality in surrounding areas, addressing both reliability and resolution requirements.
Solution Approach 2:
The light-transmissive area is positioned in the center region (second area) rather than uniformly across the entire display area. This local quality approach concentrates light transmission optimization where the camera requires it most, improving both the reliability of light path transmission and the effective resolution in the critical camera region without compromising overall display quality.
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 full-screen display with improved luminance uniformity and reduced power consumption, extending the device's lifespan and reducing manufacturing costs while maintaining product quality.
Implementation Method 1
The liquid crystal display device (LCD device) displays an image using the optical anisotropy of liquid crystals
Implementation Method 2
a first backlight disposed under the liquid crystal panel and in the first area; a second backlight disposed under the liquid crystal panel and in the second area
Data Source
AI summary
A display device including a liquid crystal panel including a display area including a first area and a second area at least partially surrounded with the first area, and a non-display area surrounding the display area; a first backlight disposed under the liquid crystal panel and in the first area; a second backlight disposed under the liquid crystal panel and in the second area; and a camera disposed under the liquid crystal panel and adjacent to the second backlight. Further, the second area includes a light incident area vertically overlapping the camera, and a light source is not disposed under the liquid crystal panel in the incident area. The display device also includes a peripheral area surrounding the light incident area, in which the second backlight is disposed under the liquid crystal panel in the peripheral area; and a color filter disposed in an upper direction of the liquid crystal panel in the first area and excluded in the upper direction of the liquid crystal panel in the second area.