Touch Display Pattern Layer for Active Pen Accuracy
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Solution Overview
Problem
The increasing size of touch panels results in insufficient touch channels, leading to poor touch accuracy of active pens.
Innovation Solution
A touch display device with a pattern layer comprising multiple minimum units, each containing at least two different types of feature bodies, forms a first pattern identifiable by an active pen, and a controller processes coordinate information to enhance touch accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the panel size is increased, then the display area is improved, but the touch accuracy deteriorates due to insufficient touch channels
Solution Approach 1:
The patent divides each touch electrode region into multiple minimum units (e.g., 4 minimum units per electrode), where each minimum unit contains a unique pattern of feature bodies. This segmentation allows the system to identify not only which electrode is touched but also which specific minimum unit within that electrode is touched, thereby improving touch accuracy while maintaining a manageable number of touch channels.
Solution Approach 2:
The patent introduces a new dimension of identification by adding a pattern layer with multiple types of feature bodies (first, second, third, and fourth feature bodies) arranged in specific patterns within each minimum unit. This dimensional addition allows the active pen to distinguish between multiple touch points within a single electrode region, effectively increasing the resolution without requiring proportionally more touch channels.
2Measurement precision
If the number of touch channels is increased, then the touch accuracy is improved, but the device complexity increases
Solution Approach 1:
Instead of increasing the number of touch channels linearly, the patent segments each electrode into multiple minimum units that can be independently identified through pattern recognition. This approach achieves higher touch accuracy without a proportional increase in touch channel count, thereby controlling device complexity.
Solution Approach 2:
The pattern layer acts as an intermediary between the touch electrodes and the active pen. The unique arrangements of feature bodies in each minimum unit serve as visual codes that the active pen can decode to determine the exact touch location, eliminating the need for additional touch channels while maintaining high accuracy.
3Measurement precision
If the touch electrodes are made smaller, then the touch accuracy is improved, but the manufacturing complexity increases
Solution Approach 1:
Rather than simply reducing electrode size, the patent adds a pattern layer with vertically arranged feature bodies that create unique vertical patterns within each minimum unit. This dimensional approach allows for larger electrode areas while maintaining high accuracy through pattern differentiation, simplifying manufacturing compared to miniaturizing electrodes.
Data Source
AI summary
Disclosed are a touch display device and a touch method thereof. The touch display device is added with a pattern layer having a plurality of minimum units. Multiple minimum units of the plurality of minimum units are disposed correspondingly on one touch electrode. The feature bodies of the pattern layer are configured to be identified by an active pen disposed externally, the first pattern has a position information, so that a first coordinate information of a touch point of the active pen is obtained by the active pen disposed externally, and the first coordinate information is used to correct a second coordinate information.