Transparent Display Panel Circuit Optimization for Under Screen Camera

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Solution Overview

Problem

The low light transmittance of display transparent areas in display panels results in a poor photographing effect for cameras under the screen, as existing methods either compromise panel penetration or suffer from inadequate light transmission.

Innovation Solution

A display panel design featuring a main display area and a functional additional area with optimized pixel driving circuits and transparent traces, where the first pixel driving circuits are configured to occupy less space and have different structures compared to the second pixel driving circuits, allowing for increased light transmittance in the display transparent area.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a display light transmission area is set on the display panel to place the under screen camera, then user display experience is improved, but light transmittance of the display transparent area becomes lower

Engineering Contradiction:
Improveuser display experienceVSAvoidlight transmittance
Core Design Contradiction:
Ease of operationVSIllumination intensity

Solution Approach 1:

The patent applies different pixel driving circuit structures in different regions: the first pixel driving circuits in the function add-on area have reduced components compared to the second pixel driving circuits in the main display area. This local differentiation allows the transparent area to have sufficient light transmittance while maintaining display functionality where needed.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The display panel is divided into a main display area and a function add-on area with different circuit configurations. The first pixel driving circuits in the function add-on area are segmented to have fewer components, creating a dedicated region with optimized light transmission properties for the under screen camera.

Inventive Principle:
Principle #1Segmentation

2Illumination intensity

If the area occupied by first pixel driving circuits is reduced in the function add-on area, then light transmittance of the display transparent area is improved, but circuit functionality may be compromised

Engineering Contradiction:
Improvelight transmittanceVSAvoidcircuit functionality
Core Design Contradiction:
Illumination intensityVSReliability

Solution Approach 1:

The patent changes the structural parameters of the pixel driving circuits by reducing the number of components in the first pixel driving circuits compared to conventional designs. This parameter modification enables smaller circuit area while maintaining sufficient functionality for driving display pixels in the transparent region.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

Different circuit configurations are applied locally: the first pixel driving circuits in the function add-on area use reduced components optimized for light transmission, while the second pixel driving circuits in the main display area use full-featured circuits optimized for display performance.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS11074856B2Display panel and display device
Publication Date: 2021.07.27 WUHAN CHINA STAR OPTOELECTRONICS SEMICONDUCTOR DISPLAY TECHNOLOGY CO LTD
  • US11074856B2 patent drawing
  • US11074856B2 patent drawing
  • US11074856B2 patent drawing

AI summary

The present application provides a display panel and a display device, the display panel makes a circuit structure of a first pixel driving circuit driving a first display pixel of a display transparent area to emit light different from a circuit structure of a second pixel driving circuit driving a second display pixel of a main display area to emit light, thereby reducing an area of a function add-on area occupied by the first pixel driving circuit, increasing an area of the display transparent area, improving light transmittance of the display transparent area, and improving photographing effect of under screen camera.