Display Panel Sensor Group Layout for Equalized Line Capacitance
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Solution Overview
Problem
Existing display panels face limitations in pin number support by IC elements, leading to inconsistent pin usage and parasitic capacitance issues due to intersecting touch and data fanout lines, affecting display quality.
Innovation Solution
A display panel design with a base substrate, display and sensor layers, and integrated circuit elements that ensure equal overlap of sensor and sub-pixel projections, balancing capacitance values at intersections to improve display effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If IC elements are used to drive sub-pixels and sensors through fanout lines, then display and touch functions are achieved, but parasitic capacitance issues arise due to intersecting touch and data fanout lines
Solution Approach 1:
The patent introduces a fourth dimension by stacking sensor groups at different vertical positions (first sensor group at higher position, second sensor group at lower position) above the substrate. This three-dimensional arrangement allows touch sensor lines and data lines to be spatially separated in the vertical dimension, preventing their intersection and eliminating parasitic capacitance coupling while maintaining both display and touch functions.
Solution Approach 2:
The patent segments the sensor array into multiple sensor groups (first sensor group and second sensor group) with distinct vertical positions. Each sensor group is further divided into multiple columns of sensors, allowing independent routing of touch signal lines for each group. This segmentation enables separate control and routing of signals, preventing interference between touch and data lines.
2Quantity of substance
If multiple columns of sensors are arranged to cover sub-pixels, then touch sensing coverage is improved, but pin number requirements for IC elements increase
Solution Approach 1:
The patent makes each IC element universal by enabling it to drive both sub-pixels and sensors through a single integrated connection. Each IC element receives signals from multiple columns of sensors (both first and second sensor groups) and distributes them to corresponding sub-pixel groups, eliminating the need for separate IC elements for touch and display functions and reducing total pin requirements.
Solution Approach 2:
The patent merges the touch sensor driving function and display driving function into a single IC element. By combining the routing and control of both sensor groups and sub-pixels within one IC element, the patent reduces the number of separate IC elements needed and consequently reduces the total pin count while maintaining comprehensive sensor coverage.
3Reliability
If fanout lines are routed to connect sensors and sub-pixels, then electrical connection is achieved, but signal line intersection causes abnormal display
Solution Approach 1:
The patent resolves the signal line intersection problem by utilizing the vertical dimension. Touch sensor lines are routed to the first sensor group at a higher vertical position, while data lines are routed to the second sensor group at a lower vertical position. This spatial separation in the vertical dimension prevents line intersection and eliminates parasitic capacitance, ensuring both reliable electrical connection and high display quality.
Data Source
AI summary
The present disclosure provides a display panel and a display device. The display panel includes: a base substrate; a display layer and a sensor layer on the base substrate, wherein the display layer includes a plurality of sub-pixel groups, each sub-pixel group includes a plurality of sub-pixels, the sensor layer includes a plurality of sensor groups, each sensor group includes a plurality of sensors, the plurality of sensors include one or more columns of first sensors arranged in a first direction and one or more columns of second sensors arranged in the first direction, each column of first sensors includes a plurality of first sensors, each column of second sensors includes a plurality of second sensors; and a plurality of integrated circuit elements.