Light Guide Plate with Light-Controlling Patterns for Uniform Display Illumination
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Solution Overview
Problem
Small-scale liquid crystal display apparatuses using LEDs suffer from bright lines or shadows due to direct light emission, leading to display quality deterioration.
Innovation Solution
A light guide plate with strategically designed light-controlling patterns on its surfaces, including recesses and protrusions, is integrated into a back light assembly to distribute light uniformly and prevent direct light emission, combined with optical members to enhance brightness and a transflective member to manage light reflection and transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a light source is directly provided to the light guide plate in a small scale liquid crystal display apparatus, then the light source can be efficiently utilized, but bright lines or shadows are generated in the display panel adjacent to the light source, deteriorating display quality
Solution Approach 1:
A light controlling pattern is introduced as an intermediary element between the light source and the light guide plate. This pattern selectively controls light transmission, allowing efficient light utilization while preventing direct light from reaching the display panel edge, thereby eliminating bright lines or shadows without sacrificing light source efficiency
Solution Approach 2:
The light controlling pattern implements local quality control by having different light transmission properties in different regions. The pattern is specifically designed in the area adjacent to the light source to block or redirect light in critical zones, while maintaining light transmission in other areas, thus achieving both efficient light utilization and display quality improvement
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 eliminates bright lines and dark areas, enhancing display quality by uniformly distributing light and preventing direct light emission from the light source, thereby improving the overall display performance.
Implementation Method 1
a light guide plate guiding a light emitted from the light source to the liquid crystal display panel
Implementation Method 2
The light guide plate guides the light toward the first area through the first light-controlling pattern
Implementation Method 3
a first light-controlling pattern formed in a first area adjacent to an incident face. The light guide plate includes a first exiting face through which a light advances towards an area except for the first area by the first light-controlling pattern
Data Source
AI summary
In a light guide plate and a display apparatus having the light guide plate, the light guide plate includes an incident face and a first exiting face. The incident face receives a light provided from an exterior. The first exiting face includes a first area and a second area. A first light-controlling pattern is formed in the second area. The first exiting face guides the incident light to the first area by the first light-controlling pattern and exits the guided light.