Light Blocking Film on LCD Frame to Stop Oblique Light Emission
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Solution Overview
Problem
In liquid crystal display devices, the peripheral frame is visually recognized when viewed obliquely, leading to deterioration of display quality due to light emission from the frame, especially when the frame supports the liquid crystal display panel and interacts with the light guide plate.
Innovation Solution
A light blocking frame is positioned around the display region, made of a material that reflects and transmits light, with a light blocking film applied to the frame's surface facing the liquid crystal display panel but not the light guide plate, preventing light emission from the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a frame is used to support the liquid crystal display panel, then the structural support is improved, but light is emitted from the frame when viewed obliquely, deteriorating display quality
Solution Approach 1:
The frame is designed with different properties in different regions: the portion facing the light guide plate maintains light-reflecting properties for structural support, while the portion facing the liquid crystal display panel is coated with a light-blocking film to prevent light emission. This local differentiation resolves the contradiction between structural support and light emission prevention.
Solution Approach 2:
The light-blocking film converts the potentially harmful light reflections from the frame into a beneficial effect by selectively blocking light in the direction that would cause display quality deterioration, while allowing light to be reflected in other directions to maintain structural functionality.
2Use of energy by moving object
If the frame reflects light from the light guide plate, then the backlight efficiency is improved, but the reflected light is visually recognized when viewed obliquely, deteriorating image quality
Solution Approach 1:
Different surfaces of the frame are given different optical properties: the surface facing the light guide plate is designed to reflect light for backlight efficiency, while the surface facing the liquid crystal display panel is coated with a light-blocking film to prevent visual recognition when viewed obliquely. This local differentiation allows the frame to simultaneously improve backlight efficiency and prevent image quality deterioration.
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 light blocking film effectively blocks light emitted from the frame, thereby preventing the deterioration of display quality and enhancing image clarity by avoiding interference from the frame's light reflections.
Implementation Method 1
a light blocking film which is formed at least on a portion of a surface of the body on a liquid-crystal-display-panel side which projects from the liquid crystal display panel
Implementation Method 2
the frame includes a body made of a material which reflects some of light incident on the body
Data Source
AI summary
A liquid crystal display device includes a light transmitting substrate arranged on a parallax barrier liquid crystal panel; a light blocking frame formed on the light transmitting substrate; and a frame positioned in a state where the frame faces an end surface of a light guide plate. The light blocking frame is formed to cover a portion of the frame arranged adjacent to the light guide plate and a portion of the frame outside the portion The frame includes a body made of a material which reflects some of light incident on the body and allows some of the light to pass through the body, and a light blocking film formed on a portion of a surface of the body on a liquid-crystal-display-panel side which projects from the liquid crystal display panel while avoiding a surface of the body which faces the light guide plate.