Light Source Block Edge Reflection Control
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Solution Overview
Problem
Conventional liquid crystal display devices experience bright bands at the edge due to excessive reflections from the optical film, leading to increased production costs and time, and complex manufacturing processes.
Innovation Solution
A light source block with a reflective surface and film supporter design, where the reflective surface intersects the film supporter at an angle, reducing edge reflections and uniformly distributing light to prevent bright bands, while being made from a single color injection-molded white material to simplify production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a white material is used for injection-molding the lamp block to eliminate reflective surface processing, then manufacturing cost and time are reduced, but excessive reflections occur at the edge of the optical film resulting in bright bands
Solution Approach 1:
The lamp block incorporates a black coating applied only to specific regions (the lower rim and areas adjacent to the optical film edge) rather than the entire surface. This localized treatment creates different optical properties in different zones: the coated areas absorb light to prevent reflections, while other areas maintain their original properties for light transmission.
Solution Approach 2:
The invention converts the potentially harmful reflection effect into a beneficial light absorption function by strategically placing black coating material. The same geometric structure that causes edge reflections is transformed into a light-absorbing feature by applying the black coating, turning the problematic edge into a solution for eliminating bright bands.
2Illumination intensity
If a reflective material is attached to the lamp block body or dual color injection molding is used to form the reflective surface, then light usability is increased, but manufacturing cost and time increase
Solution Approach 1:
Instead of applying reflective material to enhance light output, the invention applies black absorbing material in specific locations. This inverted approach uses light absorption rather than reflection to control the optical path, eliminating the need for reflective coatings while preventing the bright band effect caused by unwanted reflections at the optical film edge.
3Adaptability or versatility
If the lamp block is designed as two separate pieces (lamp holder and frame) then assembly flexibility is improved, but mold cost and production complexity increase
Solution Approach 1:
The invention integrates the lamp holder and frame into a single integrated lamp block structure. This merging eliminates the need for separate components and assembly steps, reducing mold costs and production complexity while maintaining the functional requirements of both the lamp holder and frame through the unified design.
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 bright bands at the edge of the display panel, lowering production costs and time, and simplifying manufacturing processes by ensuring uniform light distribution and eliminating the need for additional reflective coatings.
Implementation Method 1
The reflective surface is provided at a lower portion of the light source block and faces the light source module so as to reflect the light from the light source module
Data Source
AI summary
A display device and a light source block used therein are provided. The display device includes the light source block, a film set, and a display panel. The light source block has a reflective surface, a film supporter intersecting the reflective surface at an edge, and a panel supporting surface. The film supporter connects an end of an extremity surface, and the panel supporting surface connects the other end of the extremity surface. The film set is disposed on the film supporter, and the display panel is disposed on the panel supporting surface. The display panel has a display area and a light-shielding unit disposed outside the display area. The edge between the reflective surface and the film supporter falls into a vertical projection of the light-shielding unit.