Backlight Unit Reflective Member Hole Light Leakage
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Solution Overview
Problem
Backlight units in liquid crystal display devices suffer from light loss and leakage near holes, reducing light efficiency.
Innovation Solution
A backlight unit design featuring a light guide member with a reflective member on its inner wall near holes, a light receiving edge on the outer wall, and a light source to minimize light loss and leakage by using a reflective member to enhance light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a hole is formed in the light guide member, then light can be emitted through the hole area, but light loss and light leakage occur in the area near the hole
Solution Approach 1:
The patent applies this principle by converting the harmful light loss and light leakage near the hole into a beneficial effect. A reflective member is installed on the inner wall of the hole to reflect stray light back into the light guide member, transforming what would be wasted light into useful light that contributes to uniform luminance distribution.
Solution Approach 2:
The patent applies this principle by making the inner wall of the hole have different optical properties from the rest of the light guide member. The reflective member is specifically applied only to the hole's inner wall area, creating a localized optical enhancement that addresses the specific problem of light loss near the hole without affecting other areas.
2Productivity
If a hole is formed in the light guide member, then light can be emitted through the hole area, but light leakage occurs in the area near the hole
Solution Approach 1:
The patent applies this principle by converting the harmful light leakage near the hole into a beneficial effect. The reflective member captures light that would otherwise leak and redirects it back into the light guide member, transforming a harmful leakage issue into a useful light redistribution mechanism.
Solution Approach 2:
The patent applies this principle by introducing the reflective member as an intermediary element between the light source and the surrounding environment. This reflective member acts as a mediator that intercepts stray light and redirects it, preventing direct light leakage while maintaining the hole's light emission function.
3Loss of energy
If a reflective member is added on the inner wall of the hole, then light loss and leakage are reduced, but device complexity increases
Solution Approach 1:
The patent applies this principle by limiting the reflective member's application to only the hole's inner wall area, rather than applying it throughout the entire light guide member. This localized approach minimizes the added complexity while maximizing the benefit of reduced light loss in the critical hole region.
Solution Approach 2:
The patent applies this principle by using a simple, inexpensive reflective member that can be easily manufactured and installed. The reflective member is a straightforward optical component that provides significant light loss reduction without requiring complex manufacturing processes or expensive materials.
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 enhances light efficiency and prevents light leakage around the holes, ensuring uniform luminance and improved performance in liquid crystal display devices.
Implementation Method 1
a reflective member on an inner wall of the hole of the light guide member
Data Source
AI summary
A backlight unit, a liquid crystal display (LCD) device, and an electronic device including the same are provided. The backlight unit includes a light guide member having a light receiving edge provided on an outer wall, and a hole spaced apart from light receiving edge; a light source configured to provide light to the light receiving edge; and a reflective member on an inner wall of the hole of the light guide member.