Under-Display Panel Structure for Camera Light Transmission
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Solution Overview
Problem
The installation of light receiving devices such as cameras and proximity sensors on the front of display devices leads to bezel enlargement or design restrictions due to the need for exposing these components, which affects the front design of the display device.
Innovation Solution
Positioning the light receiving devices behind the display panel and enhancing transmittance in the overlapping region through a structured arrangement of subpixels, transmissive and non-transmissive areas, and varying substrate and insulating layer configurations to allow effective light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light receiving devices are installed on the front of the display device, then the light receiving function is achieved, but the bezel is enlarged or the front design is restricted
Solution Approach 1:
The light receiving device is repositioned from the front surface to the rear side of the display panel, utilizing the third dimension (depth/thickness) of the device structure. This allows the camera to be located in the non-display area behind the panel, eliminating the need for front-facing notches or holes while maintaining light reception capability through the display panel's rear surface.
Solution Approach 2:
The light receiving device is nested within the non-display area of the display device, specifically positioned behind the display panel in the rear region. This nesting approach allows the camera and its supporting structures to be integrated into the existing device footprint without protruding from the front surface, thereby avoiding bezel enlargement or design restrictions.
2Shape
If light receiving devices are positioned behind the display panel, then the bezel size is reduced and design freedom is improved, but light transmission efficiency may be compromised
Solution Approach 1:
The display panel is designed with spatially varying properties: the region overlapping the light receiving device has different optical characteristics compared to other regions. Specifically, the display panel structure in the camera-overlapping region is optimized to enhance light transmission, while other regions maintain normal display functionality. This local differentiation ensures adequate light reaches the camera without compromising overall display performance.
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 configuration allows for a reduced bezel size, improved design freedom, and effective light reception by the light receiving devices without exposing them on the front, while maintaining normal image display and functionality.
Implementation Method 1
light from the front of a display panel can be well transmitted to a light receiving device through a display panel
Data Source
AI summary
A display device includes a display panel including a display area having a first display area and a second display area, a first substrate and a second substrate in the first display area and the second display area, the first substrate and the second substrate having different thicknesses, a transistor including an active layer and a gate electrode, a first planarization layer disposed on the transistor, a second planarization layer disposed on or covering the first planarization layer, an anode electrode disposed on the second planarization layer, a bank and a light emitting layer disposed on the anode electrode. A thickness of at least one of the first planarization layer and the second planarization layer in the first display area is different from a thickness of the at least one of the first planarization layer and the second planarization layer in the second display area.