Display Panel With Under-Panel Receivers and Transmissive Regions
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Solution Overview
Problem
Display devices with integrated light receiving devices, such as cameras and proximity sensors, face issues of enlarged bezels or design restrictions due to the need for these components to be exposed on the front, which compromises the aesthetic and functional integrity of the device.
Innovation Solution
Positioning the light receiving devices behind the display panel and optimizing the display area to include transmissive and non-transmissive regions, with higher transmittance in areas overlapping the light receiving devices, achieved through varying subpixel density and structural modifications in the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If light receiving devices are installed on the front side of the display device, then light receiving function is achieved, but bezel is enlarged or front design is restricted
Solution Approach 1:
The patent moves the light receiving device from the front surface (2D plane) to the rear side of the display panel, utilizing the third dimension (depth/thickness) of the device structure. This allows the camera to be positioned behind the display panel while still accessing light from the front, thereby eliminating the need for front-facing notches or enlarged bezels.
Solution Approach 2:
The patent introduces a light transmitting structure (transparent or translucent region) as an intermediary element between the display panel and the light receiving device. This intermediary allows light to pass through the display panel from the front to reach the camera positioned at the rear, solving the contradiction between hiding the camera and maintaining light receiving capability.
2Shape
If light receiving devices are positioned behind the display panel, then bezel size is reduced and design freedom is enhanced, but light transmission to the light receiving device is compromised
Solution Approach 1:
The patent applies different optical properties to different regions of the display panel. Specifically, a transparent or translucent region is created at the location where light needs to pass through to reach the light receiving device, while other regions maintain their normal display functionality. This local modification ensures adequate light transmission without compromising the overall display quality.
Solution Approach 2:
The patent changes the optical parameters (transmittance) of the display panel at specific locations. By adjusting the transparency or translucency of the panel in the region overlapping with the light receiving device, the patent optimizes light transmission while maintaining the structural integrity and aesthetic design of the device.
3Reliability
If display panel has high transmittance region overlapping light receiving device, then light transmission is improved, but display quality may be affected
Solution Approach 1:
The patent divides the display panel into different functional regions: a transparent/translucent region for light transmission to the light receiving device, and normal display regions for image quality. This segmentation allows each region to be optimized for its specific function while maintaining 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 a display device with reduced bezel size, enhanced design freedom, and effective light transmission to the light receiving devices without exposing them, while maintaining normal 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 can include a display panel including a display area in which an image is displayed, the display area having a first display area and a second display area. The display panel includes substrates, at least one metal layer disposed on or over the substrates, a transistor disposed over the at least one metal layer and including an active layer and a gate electrode, a plurality of insulating layers disposed on or over the transistor, a pixel electrode disposed on the plurality of insulating layers, a bank and a light emitting layer disposed on the pixel electrode, an encapsulation layer disposed on or over the bank and the light emitting layer, and a touch sensor disposed over the encapsulation layer. Also, the display device can further include a light receiving device positioned under the display panel and overlapping with the first display area.