Light Guide Panel Pattern Reducing Region for LCD Light Leakage
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Solution Overview
Problem
The existing light guide panels (LGP) in liquid crystal display (LCD) apparatuses suffer from light leakage due to fixing grooves and members, which deteriorate image quality and increase manufacturing costs, especially when lenticular patterns are used to enhance 3D scanning effects.
Innovation Solution
A light guide panel design with lenticular patterns on one surface and light-emitting patterns on the other, featuring a pattern reducing region around fixing grooves with lower light-emitting density, additional pattern regions beside grooves, and a back pattern increasing region to minimize light leakage without additional manufacturing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If fixing grooves are formed in the LGP to secure the panel position, then the LGP can be fixed in position, but light leakage occurs and image quality deteriorates
Solution Approach 1:
The patent applies local quality by creating a pattern reducing region with different light-emitting pattern density compared to other regions. Specifically, the light-emitting pattern density in the pattern reducing region is controlled to be lower than in surrounding areas, which selectively reduces light emission in regions adjacent to fixing grooves while maintaining normal emission in other areas. This local modification eliminates light leakage near fixing grooves without compromising overall display quality.
2Adaptability or versatility
If lenticular patterns are formed on the LGP to increase 3D scanning effect, then 3D display capability is improved, but light leakage becomes more serious and image quality deteriorates
Solution Approach 1:
The patent combines lenticular patterns for 3D capability with a pattern reducing region that has lower light-emitting pattern density in specific areas adjacent to fixing grooves. This local modification selectively reduces light emission where fixing grooves are located while preserving the lenticular pattern's 3D scanning effect in display areas, thereby eliminating light leakage without compromising 3D display functionality.
3Object-affected harmful factors
If black color tape or white color tape is attached to fix the LGP and reduce light leakage, then light leakage is reduced, but manufacturing cost increases
Solution Approach 1:
The patent employs a self-service approach where the light guide panel's own structure is modified to eliminate light leakage. By forming a pattern reducing region with controlled light-emitting pattern density during the manufacturing process, the LGP inherently prevents light leakage without requiring additional components like black or white tapes. This integrates the light leakage prevention function into the LGP itself, avoiding extra manufacturing steps and material costs.
4Object-affected harmful factors
If additional manufacturing processes are used to attach tapes for light leakage reduction, then light leakage is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent eliminates the need for additional manufacturing processes by integrating light leakage prevention into the LGP's structure through a pattern reducing region. The light-emitting patterns are formed with controlled density in specific areas during the standard manufacturing process, allowing the LGP to prevent light leakage inherently without requiring separate tape attachment steps or additional manufacturing 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 design effectively reduces light leakage and improves image quality by controlling light-emitting pattern density and distribution, addressing the issue without increasing manufacturing costs or complexity.
Implementation Method 1
lenticular patterns for increasing a light straightness from the LGP to the liquid crystal panel
Implementation Method 2
light-emitting patterns are formed on a side of the LGP to induce light to the liquid crystal panel
Data Source
AI summary
A light guide panel, LGP, for use in a liquid crystal display, LCD, apparatus includes a light-emitting pattern surface (141) on which light-emitting patterns (P0) are formed, an opposite surface (142) opposite to the light-emitting pattern surface (141), and four edge surfaces (143-146). Lenticular patterns (L) are formed on one of the light-emitting pattern surface (141) and the opposite surface (142). The light-emitting pattern surface (141) includes a light-emitting part (141A) in which the light-emitting patterns (P0) are formed; and an edge part (141 B) which extends along the four edge surfaces (143-146) to enclose the light-emitting part (141A) and in which at least one fixing groove (G) is formed to fix the LGP. The light-emitting part (141A) includes a pattern reducing region (R) which faces the fixing groove (G) and has a lower light-emitting pattern density than another region of the light-emitting part (141A).