Display Device Sensor Area Transistor Layout Optimization
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Solution Overview
Problem
Current display devices face challenges in maintaining recognition accuracy due to insufficient light or signal transmission through narrow transmission areas in sensor areas, which affects the performance of sensors and display quality.
Innovation Solution
The design includes a display device with an enlarged transmission area in the sensor area, where transistors of the pixel circuit are strategically positioned to bypass the transmission areas, allowing for improved light transmission and signal incidence, thereby enhancing sensor recognition accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the transmission area in the sensor area is made narrow to maintain display structure, then the display panel structure is compact, but the light amount incident through the transmission area becomes insufficient and sensor recognition accuracy degrades
Solution Approach 1:
The pixel circuit is segmented into two parts: some transistors are disposed in the first pixel area while other transistors are disposed in the second pixel area. This segmentation allows the transmission area to be expanded while still providing sufficient space for all necessary circuit components, thereby improving light transmission and sensor recognition accuracy without compromising the compact display structure
Solution Approach 2:
The patent utilizes the spatial dimension by dividing the pixel area into multiple regions (first pixel area and second pixel area) arranged in different directions relative to the transmission area. This dimensional arrangement allows circuit components to be distributed across different spatial zones, enabling larger transmission area while maintaining all necessary circuit functions
2Area of stationary object
If transistors are distributed across multiple pixel areas to enlarge transmission area, then light transmission improves, but pixel circuit layout complexity increases
Solution Approach 1:
Different regions of the pixel are assigned different functions: the first pixel area contains certain transistors while the second pixel area contains other transistors. This local differentiation allows each region to be optimized for its specific purpose, with the transmission area maximized while circuit functionality is maintained through strategic local placement of components
3Measurement precision
If the sensor area transmittance is increased to improve sensor performance, then recognition accuracy improves, but display quality may be compromised
Solution Approach 1:
The patent changes the spatial distribution parameter of the pixel circuit components, transitioning from a concentrated layout to a distributed layout across multiple pixel areas. This parameter change enables the transmission area to be enlarged (improving sensor transmittance and recognition accuracy) while the display quality is maintained through proper arrangement of light emitting elements and circuit components
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 improves the transmittance of the sensor area, leading to enhanced recognition accuracy and reliability of sensors, while maintaining display quality by optimizing the placement of transistors and light emitting elements.
Implementation Method 1
a light amount (or a signal amount) incident through the transmission area
Data Source
AI summary
The display device includes a substrate including a sensor area, a display panel including a first pixel disposed in the sensor area, and a sensor disposed between the substrate and the display panel and overlapping the sensor area. The sensor area includes pixel areas in which the first pixel is disposed and transmission areas in which the first pixel is not disposed, the transmission areas include a first transmission area, the pixel areas include a first pixel area positioned in a first direction of the first transmission area and a second pixel area positioned in a second direction crossing the first direction of the first transmission area, the first pixel includes a first pixel circuit, some of transistors of the first pixel circuit are disposed in the first pixel area, and others of the transistors of the first pixel circuit are disposed in the second pixel area.