Under-Display Camera Layout With Folded Pixel Array and LC Lens
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Solution Overview
Problem
Existing mobile terminals face challenges in implementing full-screen displays due to camera placement, leading to reduced screen size and image quality issues from pixels overlapping the camera region, which cannot be fully addressed by image quality compensation algorithms.
Innovation Solution
A display device with a first and second display panel and a light guide module that refracts external light away from the camera region, allowing a light transmissive area without pixels, and an optical sensor module to capture images without interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If pixels are arranged in the pixel region overlapping the camera to implement full-screen display, then the screen size is increased, but the image quality deteriorates due to pixel interference
Solution Approach 1:
The display panel is divided into a first pixel array region and a second pixel array region. The first pixel array region is disposed on a front surface of the display panel and includes a plurality of pixels arranged in an array. The second pixel array region is disposed on a rear surface of the display panel and includes a plurality of pixels arranged in an array. This segmentation allows each region to serve different functions: the first region for display and the second region for capturing light without interfering with the camera.
Solution Approach 2:
The patent utilizes the third dimension (depth) by arranging pixel arrays on both the front and rear surfaces of the display panel. The second pixel array region is disposed at a rear surface of the display panel, below the first pixel array region. This dimensional change allows the camera to capture light without interference from pixels in the overlapping region, while still maintaining full-screen display capability.
2Measurement precision
If a light transmissive region without pixels is created to improve camera image quality, then image quality is improved, but the display area is reduced
Solution Approach 1:
The patent utilizes the third dimension (depth) by arranging pixel arrays on both the front and rear surfaces of the display panel. The second pixel array region is disposed on the rear surface, allowing it to occupy the same planar space as the camera without reducing the front display area. This enables full-screen display while maintaining image quality.
Solution Approach 2:
The second pixel array region is nested within the display panel structure, specifically on the rear surface below the first pixel array region. This nesting allows the second pixel array to coexist with the camera and other components without reducing the external dimensions or front display area of the device.
3Measurement precision
If image quality compensation algorithms are used to improve image quality, then some improvement is achieved, but pixel interference cannot be completely eliminated
Solution Approach 1:
The patent extracts the problematic pixels from the camera's field of view by arranging the second pixel array region on the rear surface of the display panel. This physical separation removes the source of interference (pixels in the overlapping region) from the camera's light path, eliminating the need for complex compensation algorithms to remove pixel artifacts from images.
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 and improves image quality by minimizing pixel interference, enhancing selfie image quality and reducing noise in optical sensor data for biometric authentication.
Implementation Method 1
a light guide module which is arranged between a light transmissive region of the first display panel and a second pixel array region of the second display panel to pass light from the second pixel array region to the light transmissive region, and to refract external light incident through the light transmissive region away from the second pixel array region
Implementation Method 2
The light guide module includes a switchable liquid crystal lens disposed between the light transmissive region and the second pixel array region and including a liquid crystal layer to which an electric field is applied according to a liquid crystal driving voltage
Implementation Method 3
including a liquid crystal layer to which an electric field is applied according to a liquid crystal driving voltage
Data Source
AI summary
The present disclosure relates to a display device and a mobile terminal including the same. The display device can include a display panel including a first pixel array region, a light transmissive region, and a second pixel array region and a light guide module disposed below the light transmissive region. Additionally, a portion of the display panel on which the second pixel array region is disposed can be folded behind the light guide module so that the second pixel array region faces the light guide module. The light guide module can include a switchable liquid crystal lens disposed between the light transmissive region and the second pixel array region, and including a liquid crystal layer to which an electric field is applied according to a liquid crystal driving voltage.