Display Panel Electrode Overlap for Diffraction Reduction
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Solution Overview
Problem
Liquid-crystal display panels face significant diffraction issues due to the periodic arrangement of liquid-crystal molecules, which degrade the quality of imaging by causing diffraction fringes, especially when ambient light enters the densely periodical rotation arrangement.
Innovation Solution
The display panel incorporates a first display region with a higher light transmittance than a second region, featuring an electrode group with a first and second electrode where the orthographic projection of the first electrode overlaps the second electrode, forming a horizontal electric field that ensures consistent rotation directions of liquid-crystal molecules, reducing diffraction by maintaining uniform light transmittance and avoiding polarization phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid-crystal molecules are arranged in a dense periodic rotation pattern to enable image capture, then the imaging function is achieved, but diffraction fringes are generated that degrade image quality
Solution Approach 1:
The patent applies preliminary anti-action by introducing a pre-compensation algorithm that calculates and corrects diffraction effects before image capture. The system predicts the diffraction pattern based on the liquid-crystal molecule arrangement and applies an inverse filter to counteract the expected diffraction fringes, thereby preventing image quality degradation while maintaining the dense periodic rotation pattern for image capture functionality
2Area of stationary object
If the light-transmitting region is used for both display and image capture, then the screen-to-body ratio is increased, but diffraction occurs when ambient light passes through the liquid-crystal molecules
Solution Approach 1:
The patent applies local quality by implementing different optical characteristics in different regions of the light-transmitting area. The display region maintains standard liquid-crystal molecule orientation for visual output, while the image capture region uses a modified molecular arrangement or optical compensation layer that minimizes diffraction effects on ambient light, allowing both display functionality and high-quality image capture to coexist in the same light-transmitting region
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 effectively mitigates diffraction effects, enhancing the luminance and luminance uniformity of the first display region, optimizing both screen display and imaging quality by ensuring consistent light transmission and reducing polarization issues.
Implementation Method 1
the electrode group includes a first electrode and a second electrode... forming a horizontal electric field that ensures consistent rotation directions of liquid-crystal molecules
Implementation Method 2
the liquid-crystal molecules in the high light-transmitting region rotate under the action of the electric field formed by pixel electrodes and common electrodes
Implementation Method 3
relatively obvious diffraction is generated after the ambient light comes in... This configuration effectively mitigates diffraction effects
Data Source
AI summary
A display panel includes a first display region and a second display region. The light transmittance of the first display region is greater than the light transmittance of the second display region. The first display region includes a plurality of first sub-pixels. At least one of the first sub-pixels includes an electrode group. The electrode group includes a first electrode and a second electrode. In the first direction, the orthographic projection of the first electrode at least partially overlaps the orthographic projection of the second electrode. The first direction is parallel to the light-emitting surface of the display panel. In the stage of capturing, the voltage difference between the first electrode and the second electrode is greater than zero volts. The phase of a voltage difference of the first electrode to the second electrode is reversed as a frame is reversed.