Dual View-Field Display Slit Grating Light Leakage
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Solution Overview
Problem
The viewing angle of dual view-field displays is limited due to light leakage through the edges of the slit grating, causing crosstalk and reducing user experience.
Innovation Solution
A dual view-field display is designed with a slit grating on one side of the color filter or array substrate, featuring light-shielding and light-transmitting regions arranged in a matrix, and a light blocking portion to prevent light leakage from the upper and lower edges of the light-transmitting regions, enhancing the viewing angle and reducing crosstalk.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a slit grating is used to enable dual view-field display, then different images can be seen at two sides of the display screen, but light leakage occurs through the edges of the light-transmitting regions causing crosstalk and limiting the viewing angle
Solution Approach 1:
A light blocking portion is introduced as an intermediary element between the light-transmitting regions of the slit grating. This light blocking portion specifically targets and blocks light leakage from the upper and lower edges of the light-transmitting regions, preventing crosstalk between adjacent pixel units while preserving the dual view-field functionality. The light blocking portion acts as a mediator that resolves the conflict between light transmission and light leakage prevention.
Solution Approach 2:
The light blocking portion is selectively positioned only at the upper and lower edges of the light-transmitting regions where light leakage occurs, rather than uniformly across the entire slit grating. This localized approach blocks harmful light leakage at specific problem areas while maintaining light transmission in the central regions, thus preserving the dual view-field display capability without unnecessary loss of light.
2Illumination intensity
If the slit grating light-transmitting region is made larger to improve viewing angle, then more light can be transmitted, but light leakage from edges increases causing more crosstalk
Solution Approach 1:
The light blocking portion serves as a targeted intermediary that intercepts light leakage at the edges of the light-transmitting regions. By placing this blocking structure specifically at the upper and lower edges, the patent allows the light-transmitting regions to maintain their size for adequate light transmission while the light blocking portion selectively prevents edge leakage that would otherwise increase with larger transmission regions.
3Object-affected harmful factors
If a light blocking portion is added to prevent light leakage, then crosstalk is reduced and viewing angle is improved, but device complexity increases
Solution Approach 1:
The light blocking portion is implemented in a highly localized manner, appearing only at the upper and lower edges of the light-transmitting regions rather than as a comprehensive complex structure throughout the display. This localized implementation minimizes the added complexity while effectively addressing the light leakage problem at the specific locations where it occurs.
Solution Approach 2:
The light blocking function is segmented into discrete portions positioned at specific locations (upper and lower edges of light-transmitting regions) rather than implementing a single complex blocking structure. This segmentation allows the light blocking function to be achieved through simpler, distributed elements that reduce overall device complexity.
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 effectively increases the viewing angle and prevents crosstalk, allowing users to view the display from a wider range of positions without image distortion.
Implementation Method 1
controlling liquid crystals at a position corresponding to the dark-state sub-pixel to deflect by the array substrate according to the control signal
Implementation Method 2
The slit grating comprises light-shielding regions and light-transmitting regions which are arranged at intervals in a matrix
Data Source
AI summary
A dual view-field display and a fabricating method and a driving method thereof are provided. The dual view-field display includes a color filter substrate and an array substrate which are oppositely disposed. A slit grating is disposed on a side of the color filter substrate or the array substrate, and the color filter substrate includes a plurality of pixel units and a first black matrix surrounding each pixel unit. The slit grating includes light-shielding regions and light-transmitting regions, which are arranged at intervals in a matrix. The dual view-field display further comprises a light blocking portion configured for preventing light rays from leaking out of an upper-edge region and/or a lower-edge region of the light-transmitting region, which solves a problem that a viewing angle of a user of the dual view-field display is limited.