Liquid Crystal Panel With Interference Sub-Pixels For Viewing Angle Control
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Solution Overview
Problem
Conventional dual-structure liquid crystal panels for controlling viewing angles suffer from reduced brightness, increased thickness, and weight, as well as limited secrecy in narrow viewing angle mode due to the need for external light to penetrate two liquid crystal layers, and images are dimly viewed from the sides even in narrow viewing angle mode.
Innovation Solution
A liquid crystal panel design incorporating red, green, blue, and interference sub-pixels, where the interference sub-pixels are driven by a vertical electric field to selectively interfere with light traveling in side directions, allowing for both narrow and wide viewing angle modes without increasing panel thickness or reducing brightness, by using the same plane or layer for all sub-pixels and employing a data driver and interference data generator to control the interference sub-pixel data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a dual-structure liquid crystal panel with an interference panel is used to control viewing angle, then viewing angle control is improved, but brightness is greatly reduced and the panel becomes thicker and heavier
Solution Approach 1:
The liquid crystal panel is segmented into multiple domains with different orientation directions. Each domain has liquid crystal molecules oriented in a specific direction, creating multiple viewing angle zones within a single panel structure. This eliminates the need for a dual-structure panel while maintaining viewing angle control capabilities.
Solution Approach 2:
The invention transitions from a dual-layer structure (normal panel + interference panel) to a single-layer multi-domain structure. By changing the organizational dimension from vertical stacking to in-plane domain distribution, the panel achieves viewing angle control without the thickness and brightness penalties of multiple layers.
2Adaptability or versatility
If a dual-structure liquid crystal panel with an interference panel is used to control viewing angle, then viewing angle control is improved, but the panel becomes thicker and heavier
Solution Approach 1:
The liquid crystal panel is segmented into multiple domains with different orientation directions. Each domain has liquid crystal molecules oriented in a specific direction, creating multiple viewing angle zones within a single panel structure. This eliminates the need for a dual-structure panel while maintaining viewing angle control capabilities.
Solution Approach 2:
The invention merges the functions of the normal panel and interference panel into a single integrated liquid crystal panel with multi-domain structure. By combining these functions in one layer rather than stacking two panels, the overall weight is reduced while maintaining viewing angle control functionality.
3Adaptability or versatility
If a dual-structure liquid crystal panel is used, then multiple viewing angle modes are achieved, but external light must penetrate two liquid crystal layers causing reduced brightness
Solution Approach 1:
The liquid crystal panel is segmented into multiple domains with different orientation directions. Each domain has liquid crystal molecules oriented in a specific direction, creating multiple viewing angle zones within a single panel structure. This eliminates the need for a dual-structure panel while maintaining viewing angle control capabilities.
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 limits the viewing angle to enhance secrecy in the narrow mode while maintaining brightness and reducing panel thickness, as the interference sub-pixels control light interference without additional layers, allowing images to be viewed only within a small angle from the front, thereby improving user secrecy and display performance.
Implementation Method 1
A plurality of interference (E) sub-pixels are included in each of the color pixels and disposed on any one of the same plane and layer as the color pixels to limit light that penetrates the liquid crystal panel and travels in both side directions of the liquid crystal panel
Implementation Method 2
A liquid crystal display device (LCD) displays an image by controlling the strength of an electric field applied to a liquid crystal panel such that the quantity of light penetrating the liquid crystal panel is adjusted
Data Source
AI summary
Provided is a liquid crystal panel that limits a viewing angle. The liquid crystal panel includes a plurality of color pixels and a plurality of interference sub-pixels. Each of the color pixels includes red (R), green (G) and blue (B) sub-pixels. The interference sub-pixels are included in each of the color pixels and disposed on the same plane as the color pixels to control light that penetrates the liquid crystal panel and travels in side directions of the liquid crystal panel, except the front direction thereof. The viewing angle can be controlled by the interference sub-pixels. Since the interference sub-pixels and the color sub-pixels are disposed on the same plane, the thickness and weight of the liquid crystal panel do not increase. Further, it is possible to prevent the decrease of the light quantity and the degradation of the brightness.