Parabolic Light-Source Unit Eliminates Light Guide Plate
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Solution Overview
Problem
Display devices with light-emitting panels, such as LCDs, face challenges due to the adverse effects of heat on light guide plates and high production costs, which affect light uniformity and manufacturing costs.
Innovation Solution
A light-source unit with a parabolic reflection portion and a lens to ensure light straightness, combined with an inclined reflection sheet, eliminates the need for a light guide plate, providing high light uniformity and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is used to guide light from the light source, then light uniformity is improved, but manufacturing cost increases and the plate shape is adversely affected by heat
Solution Approach 1:
The patent removes the light guide plate from the system entirely. Instead of using a separate component to guide light, the invention integrates the light guiding function directly into the light source structure through a reflective housing with specific geometric features that direct light without requiring an additional light guide plate.
Solution Approach 2:
The patent combines the light source housing and light guiding function into a single integrated structure. The housing itself is designed with reflective surfaces and geometric shapes that perform both structural support and light guidance functions, eliminating the need for separate light guide plates.
2Illumination intensity
If a light guide plate is used to guide light, then light uniformity is improved, but the plate shape is adversely affected by heat generated from the light source
Solution Approach 1:
The patent removes the light guide plate from the system entirely, eliminating the component that is adversely affected by heat. By integrating the light guiding function into the light source housing itself, the invention eliminates the separate plate that would suffer from thermal deformation.
3Ease of operation
If a light guide plate is used, then light guidance is achieved, but device complexity increases
Solution Approach 1:
The patent combines the light source housing and light guiding function into a single integrated structure. The housing itself is designed with reflective surfaces and geometric shapes that perform both structural support and light guidance functions, eliminating the need for separate light guide plates and reducing overall device 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 solution achieves high light uniformity and reduces manufacturing costs by ensuring light straightness and uniform distribution without a light guide plate, enhancing display quality and cost-effectiveness.
Implementation Method 1
a reflection portion reflecting light emitted from the light-source. A cross-section of the reflection portion, which is parallel to a direction in which the light in the light-source is emitted, may have a parabola shape, and the light may be reflected by the reflection portion to proceed straight.
Implementation Method 2
The light-source unit may further include a lens portion disposed at an end of the reflection portion along a direction outputting the light.
Implementation Method 3
a back-light unit includes the light-source unit and a reflection sheet reflecting the light outputted from the light-source unit. The reflection sheet may be inclined with respect to a direction in which the light in the light-source unit is outputted.
Data Source
AI summary
A light-source unit for providing light to a display panel includes at least one light-source. The at least one light-source is mounted in a circuit board. A body portion having a housing space houses the circuit board on which the at least one light-source is mounted. A reflection portion reflects light emitted from the at least one light-source. The reflection portion has a parabola shape. The light is reflected by the reflection portion to proceed straight and in a direction perpendicular to a direction that the light is emitted from the at least one light-source.