Display Panel Noise Mitigation via Phase Difference Control
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Solution Overview
Problem
Existing display panels face challenges in shielding electromagnetic and other signals, which can affect display quality, especially in regions with integrated sensors, leading to uneven brightness and display differences between sensor and non-sensor areas.
Innovation Solution
A display panel design that includes pixel groups and driving signal lines, where the phase difference between charging enabling levels provided by driving signal lines corresponding to adjacent sub-pixels is non-integer times of the noise cycle, effectively mitigating the impact of noise signals on sub-pixel brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a shielding layer is attached to shield electromagnetic signals, then display quality is improved, but screen body thickness increases and sensor design freedom is limited
Solution Approach 1:
The patent removes the shielding layer from the display structure entirely. Instead of adding a shielding layer to block electromagnetic signals, the invention extracts this component and replaces it with a noise signal receiving mode that utilizes the existing pixel structure and driving signal lines to mitigate interference effects through phase difference control.
Solution Approach 2:
The patent replaces the physical mechanical shielding layer with an electrical signal processing approach. By controlling the phase difference between driving signal lines and receiving noise signals electrically, the system achieves interference mitigation without the mechanical barrier of a shielding layer, thus reducing thickness while maintaining display quality.
2Object-affected harmful factors
If a shielding layer is attached to shield electromagnetic signals, then display quality is improved, but material, device, time, and process costs increase
Solution Approach 1:
The patent extracts and eliminates the shielding layer from the manufacturing process. By removing this component entirely and replacing it with control methods using existing display panel structures and driving circuits, the invention reduces material costs, device complexity, manufacturing time, and process costs while maintaining the ability to mitigate electromagnetic signal interference.
Solution Approach 2:
The patent enables the display panel's existing structures (pixel groups, driving signal lines) to serve the dual function of displaying images and mitigating noise interference. By making the existing components self-sufficient for noise mitigation through phase difference control, the invention eliminates the need for additional shielding components and their associated manufacturing costs.
3Adaptability or versatility
If the shielding layer is hollowed in the perforated region to accommodate sensors, then sensor integration is enabled, but the perforated region cannot be protected resulting in display differences
Solution Approach 1:
The patent removes the shielding layer that would need to be hollowed out for sensor integration. By eliminating this component entirely, the invention allows sensors to be integrated in the perforated region without creating display differences, as there is no shielding layer to compromise the uniformity of the perforated region protection.
4Reliability
If adjacent first color sub-pixels are driven by different driving signal lines with integer times phase difference, then noise cycle alignment is achieved, but brightness deviation becomes visible
Solution Approach 1:
The patent introduces asymmetry in the phase difference between driving signal lines, specifically setting it to non-integer times of the noise cycle rather than integer times. This asymmetric phase relationship prevents synchronized brightness deviations of adjacent sub-pixels while maintaining noise signal reception capability, thereby improving brightness uniformity without sacrificing reliability.
Data Source
AI summary
The display panel includes pixel groups including multiple sub-pixels; and driving signal lines. One driving signal line corresponds to at least one pixel group of the pixel groups, and multiple driving signal lines sequentially output a charging enabling level to drive corresponding pixel groups. The sub-pixel includes a first color sub-pixel that includes a first sub-pixel and a second sub-pixel. The first and second sub-pixels are arranged along an arrangement direction of the pixel group, and the second sub-pixel and the first sub-pixel are spaced by other first color sub-pixels whose number is not greater than a preset number. In a first mode, the display panel receives a noise signal, and a phase difference between charging enabling levels provided by the driving signal lines corresponding to the first sub-pixel and the second sub-pixel is non-integer times a noise cycle.