Touch Display Noise Sensing Line for Signal Accuracy
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Solution Overview
Problem
Display devices with touch functions face noise interference from other configurations, leading to deterioration of touch input accuracy, necessitating a method to enhance noise reduction for improved performance.
Innovation Solution
A display device with a touch function incorporating a touch line, a noise sensing line, and a touch driving circuit to identify and correct touch input signals using noise signals detected by the noise sensing line, thereby improving touch input accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If various display configurations including gate-in-panel are used in addition to touch function configuration, then device functionality is enhanced, but noise is generated that deteriorates touch function performance
Solution Approach 1:
The patent divides the sensing function into two separate components: a touch sensing line for detecting touch inputs and a noise sensing line for detecting noise signals. This segmentation allows the system to independently process and subtract noise from touch signals, resolving the contradiction by enabling both enhanced device functionality and reduced noise interference through separate detection pathways.
Solution Approach 2:
The noise sensing line acts as an intermediary element that captures noise signals generated by display configurations before they interfere with touch sensing. By introducing this intermediate noise detection mechanism, the system can identify and eliminate noise components, allowing both the display configurations and touch function to coexist with improved performance.
2Measurement precision
If noise sensing line is added to reduce noise, then touch input accuracy is improved, but device complexity increases
Solution Approach 1:
The noise sensing line is designed to share the same conductive material layer and manufacturing process as the touch sensing line, allowing both noise detection and touch detection functions to be performed by structurally similar components. This multi-functionality approach improves touch input accuracy while minimizing the increase in device complexity by reusing existing structural elements.
Solution Approach 2:
The patent adjusts the spatial parameter of the noise sensing line by positioning it at a specific distance from the touch sensing line in the non-display area. This parameter change optimizes the noise sensing line's ability to detect noise while maintaining structural simplicity and avoiding excessive complexity in the overall device architecture.
Data Source
AI summary
A display apparatus with a touch function and an operating method thereof are provided. The display apparatus with a touch function according to an embodiment of the present disclosure may include a touch line connected to a touch electrode disposed in a display area of the display apparatus, a noise sensing line disposed to be spaced apart from the touch line by a first distance in a non-display area of the display apparatus, a driving signal line for providing a driving signal of the display apparatus in the non-display area, and a touch driving circuit for identifying information on a touch input using a touch input signal acquired through the touch line and a noise signal acquired through the noise sensing line. Accordingly, the information on the touch input can be more accurately identified by controlling a touch input signal using a line for detecting a noise.