Light-Transmitting Support Pin Grooves for LCD Brightness Uniformity
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Solution Overview
Problem
Current support pins in liquid crystal display backlight modules cause uneven brightness and circular shadows due to light obstruction, affecting image quality, especially in high-resolution displays requiring higher brightness.
Innovation Solution
The design of support pins with a light-transmitting material and integrally formed grooves that diffuse or refract light, reducing the intensity of light reflected towards the supporting base and enhancing brightness uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If support pins are installed among backlight sources to support the diffuser, then the diffuser deformation is prevented and brightness uniformity is improved, but circular shadows appear at the support pin positions and picture quality deteriorates
Solution Approach 1:
The patent converts the harmful light obstruction effect of support pins into a beneficial light guiding function. By designing light-guiding grooves on the support pin surfaces, the structure that originally caused circular shadows is transformed into an element that redirects light away from shadow-prone areas, thereby eliminating the harmful effect while maintaining the structural support function.
Solution Approach 2:
The patent applies different structural characteristics to different parts of the support pin. The supporting base portion maintains a simple cylindrical structure for stable support, while the supporting section incorporates light-guiding grooves to address the local problem of light obstruction. This localized structural differentiation allows the support pin to fulfill both mechanical support and optical optimization functions without compromising either.
2Manufacturing precision
If the number of support pins is increased to improve brightness uniformity, then diffuser support is enhanced, but light transmission paths are blocked more and circular shadows become more conspicuous
Solution Approach 1:
By equipping each support pin with light-guiding grooves, the patent transforms every support pin from a light-blocking obstacle into a light-redirection element. This allows the system to use multiple support pins for improved brightness uniformity while the grooves on each pin actively guide light around the support structure, preventing the formation of conspicuous circular shadows and maintaining overall light transmission efficiency.
3Ease of manufacture
If support pins with simple cylindrical structure are used, then manufacturing is easy and cost is reduced, but light obstruction occurs and picture quality deteriorates
Solution Approach 1:
The patent applies the light-guiding groove structure only to the supporting section of the pin that contacts the diffuser, while keeping the supporting base portion simple and cylindrical. This localized application of complex geometry minimizes manufacturing complexity while effectively addressing the light obstruction problem at the critical interface with the diffuser.
Solution Approach 2:
The support pin is divided into two functional segments: a simple supporting base for structural stability and ease of manufacture, and a grooved supporting section for optical optimization. This segmentation allows each part to be optimized independently, maintaining manufacturing simplicity while eliminating light obstruction effects.
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 reduces dark shadows and improves image quality by increasing brightness uniformity by about 7.8% around the support pins, ensuring more uniform light distribution across the LCD panel.
Implementation Method 1
the grooves diffusely reflect or refract part of incident light transmitted inside the supporting section
Implementation Method 2
the grooves diffusely reflect or refract part of incident light transmitted inside the supporting section
Data Source
AI summary
A support pin supporting at least one optical component in an optical cavity includes a supporting base and a supporting section connecting the supporting base. The supporting section is made of a light-transmitting material. A plurality of grooves are integrally formed on the supporting section. The grooves reflect or refract part of incident light transmitted inside the supporting section diffusely and do not penetrate the supporting section. In addition, a backlight module and a display device with the support pins are also disclosed herein.