Integrated Touch Electrode Display for Full-Area Sensing Reliability
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Solution Overview
Problem
Existing display devices face challenges in ensuring reliable touch sensing across the entire sensor area without the need for additional sensor layers or digitizer layers, which can increase thickness and cost.
Innovation Solution
The display device incorporates a touch sensing unit with touch electrodes, switching elements, and a common voltage line, along with a touch driver that operates in different periods to sense user inputs, and uses electromagnetic control lines to manage gate signals, eliminating the need for separate sensor layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate sensor layers or digitizer layers are added to ensure reliable touch sensing, then sensing reliability is improved, but device thickness and cost increase
Solution Approach 1:
The patent merges the touch sensing function with the display panel by integrating touch electrodes directly into the display structure. The touch electrodes are formed in the same pixel structure as the display elements, eliminating the need for separate sensor layers or digitizer layers while maintaining sensing reliability across the entire touch area.
Solution Approach 2:
The display panel structure is designed to serve dual functions: displaying visual information and sensing touch inputs. The same pixel structure and electrode system are used for both display and touch sensing operations, reducing overall device complexity and thickness.
2Reliability
If separate sensor layers or digitizer layers are added to ensure reliable touch sensing, then sensing reliability is improved, but device cost increases
Solution Approach 1:
The patent combines touch sensing and display functions into a single integrated structure, eliminating the need for separate sensor layers or digitizer layers. This integration reduces material costs, manufacturing complexity, and assembly steps while ensuring reliable touch sensing across the entire display area.
Solution Approach 2:
The display panel is designed to perform multiple functions simultaneously - visual display and touch sensing - using the same structural components. This multi-functionality reduces the total bill of materials and simplifies the manufacturing process, thereby reducing device cost.
3Reliability
If touch electrodes are driven during display period, then sensing capability is improved, but display performance may be affected
Solution Approach 1:
The patent implements periodic switching between display mode and sensing mode by controlling the touch electrodes during different time periods. During the display period, electrodes maintain display function; during sensing periods, the same electrodes are driven to detect touch inputs. This time-division multiplexing ensures both display performance and sensing capability without mutual interference.
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 enhances sensing reliability and sensitivity across the entire touch sensor area while reducing device thickness and cost by eliminating separate sensor layers, utilizing electromagnetic resonance for touch input detection.
Implementation Method 1
a touch driver configured to sense an input of a user's body by driving the plurality of touch electrodes during a first period
Implementation Method 2
utilizing electromagnetic resonance for touch input detection
Data Source
AI summary
A display device including: a display unit having a plurality of pixels; a plurality of touch electrodes disposed on the display unit; a touch line connected to a first end of each of the plurality of touch electrodes; a common voltage line spaced apart from the plurality of touch electrodes; and a plurality of switching elements connected between the common voltage line and a second end of each of the plurality of touch electrodes.