Texture Recognition Display Device Noise Cancellation
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Solution Overview
Problem
Existing texture recognition display devices face challenges in improving the precision of texture recognition signals and detection accuracy due to noise interference and low signal-to-noise ratios.
Innovation Solution
A texture recognition display device is designed with paired first and second control signal lines, where the second control signal has the same frequency as the first but differs by 180 degrees in phase, to counteract noise interference and enhance signal quality, combined with an integrated driver circuit and photosensitive sensing units for improved signal processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single control signal line is used to drive pixel circuits during texture recognition, then the device structure remains simple, but noise interference increases and signal-to-noise ratio decreases
Solution Approach 1:
The single control signal line is segmented into two separate lines: a first control signal line for providing the control signal to pixel circuits, and a second control signal line for receiving the control signal. This segmentation allows independent optimization of each line's function and reduces mutual interference, thereby improving signal precision while maintaining manageable structural complexity.
Solution Approach 2:
A differential signaling mechanism is introduced as an intermediary between the control signal source and the pixel circuits. The second control signal line receives a control signal with 180-degree phase difference relative to the first control signal line, creating a differential pair that acts as an intermediary to reject common-mode noise and improve signal-to-noise ratio.
2Measurement precision
If paired control signal lines with 180-degree phase difference are implemented, then signal-to-noise ratio and detection precision improve, but device structure and circuit complexity increase
Solution Approach 1:
The paired control signal lines are merged into a differential signaling system where the first and second control signal lines work together as a coordinated pair. The driver circuit generates differential signals that are simultaneously applied to both lines, allowing the system to achieve noise rejection through combined operation while maintaining a unified control architecture that manages structural complexity.
Solution Approach 2:
The phase parameter of the control signal is changed to create a 180-degree phase difference between the first and second control signal lines. This parameter change enables differential signaling operation, which improves detection accuracy by rejecting common-mode noise while the phase relationship is maintained through synchronized signal generation in the driver circuit.
3Object-affected harmful factors
If differential signaling with 180-degree phase difference is used, then noise interference is reduced and signal quality improves, but driver circuit complexity increases
Solution Approach 1:
The driver circuit generates periodic square wave signals with 180-degree phase difference for the paired control signal lines during the texture recognition period. This periodic differential action creates a noise-canceling effect where common-mode interference is rejected, reducing noise impact on the recognition output lines while the periodic nature simplifies the timing control logic in the driver circuit.
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
The solution significantly improves the signal-to-noise ratio and detection precision of texture recognition signals, enabling more accurate texture recognition and reduction of noise interference.
Implementation Method 1
the second control signal and the first control signal have a same frequency, and phases differing by 180 degrees
Implementation Method 2
the second control signal line is used for receiving a second control signal during the texture recognition period, the second control signal and the first control signal have a same frequency, and phases differing by 180 degrees
Implementation Method 3
photosensitive characteristics of PIN junctions may be utilized to achieve optical texture recognition function
Data Source
AI summary
Disclosed are a texture recognition display device and a driving method. The texture recognition display device includes a plurality of first control signal lines and second control signal lines disposed in pairs. During a texture recognition period, the second control signal lines are loaded with a second control signal, the frequency of which is the same as that of a first control signal of the first control signal lines and the phase of which differs from that of the first control signal by 180 degrees. Thus, the noise interference of the first control signal of the first control signal line with a recognition output line may be counteracted, the signal-to-noise ratio of an obtained texture recognition signal can be improved, thereby improving the extraction precision of the texture recognition signal and detection precision.