Touch Detection Electrodes Integrated with Display Drive Circuits
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Solution Overview
Problem
Existing display devices with touch detection functions are complex and costly due to the need for separate detection circuits and components, increasing the number of components and complexity.
Innovation Solution
A display device with a touch detection function that integrates touch detection electrodes into the same substrate as the display functional layer, using a capacitive coupling method to detect touch inputs, eliminating the need for separate detection circuits and components by sharing drive electrodes for both image display and touch detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate detection circuits and components are used for button input in the frame, then touch detection function is achieved, but device complexity and component count increase
Solution Approach 1:
The patent merges the button input detection function with the existing touch panel detection circuit. The same drive electrodes and touch detection electrodes used for the touch panel are extended into the frame region to detect button inputs. This eliminates the need for separate detection circuits and components, thereby reducing device complexity while maintaining the touch detection function.
Solution Approach 2:
The touch panel detection circuit is designed to serve multiple functions: it detects both touch inputs on the display area and button inputs in the frame region. By making the detection circuit universal, the patent avoids the need for dedicated separate circuits, thus reducing component count and complexity while achieving versatile input capabilities.
2Adaptability or versatility
If separate detection circuits and components are used for button input in the frame, then touch detection function is achieved, but component count increases
Solution Approach 1:
The patent combines the button detection components with the touch panel components. The drive electrodes and touch detection electrodes are physically extended from the touch panel area into the frame region, sharing the same conductive structures. This merging approach significantly reduces the component count by eliminating redundant elements.
Solution Approach 2:
The same set of drive electrodes and touch detection electrodes serves dual purposes: controlling and detecting touch inputs on the display area and detecting button inputs in the frame. This multi-functional design reduces the quantity of components needed while achieving comprehensive input detection capability.
3Adaptability or versatility
If separate detection circuits and components are used for button input in the frame, then touch detection function is achieved, but manufacturing cost increases
Solution Approach 1:
By merging the button detection function into the existing touch panel structure, the patent eliminates the need for separate manufacturing processes for additional detection circuits and components. The shared electrodes and circuits can be manufactured in the same production line, reducing manufacturing complexity and cost.
Solution Approach 2:
The universal detection circuit design allows a single manufacturing process to produce components that serve both touch panel and button detection functions. This reduces the need for separate assembly steps and quality control processes, thereby lowering manufacturing costs while achieving versatile input detection.
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 simplifies the device architecture, reduces component count and manufacturing steps, and lowers costs while maintaining effective touch detection capabilities.
Implementation Method 1
a plurality of touch detection electrodes facing the first drive electrodes in a perpendicular direction and extending in a direction different from a direction in which the first drive electrodes are extended, the plurality of touch detection electrodes being capacitively-coupled to the first drive electrodes
Data Source
AI summary
According to an aspect, a display device with a touch detection function includes: a first substrate; a plurality of pixel electrodes in a first region; a display functional layer; a plurality of first drive electrodes facing the pixel electrodes in a perpendicular direction with respect to a surface of the first substrate; and a plurality of touch detection electrodes facing the first drive electrodes and extending in a direction different from a direction in which the first drive electrodes are extended. At least one touch detection electrode of the plurality of touch detection electrodes extends from the first region to a second region adjacent to the first region. A second drive electrode capacitively-coupled to the at least one touch detection electrode is further provided in the second region.