Illumination Device Frame Heat Dissipation via Segmented Metal Resin Structure
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Solution Overview
Problem
The existing illumination devices in liquid crystal displays face issues with heat dissipation, leading to decreased light-emitting efficiency, ununiform brightness, and shorter product life due to the use of frames that hinder heat release from light-emitting elements.
Innovation Solution
A display device configuration that includes a light guide plate, light-emitting elements arranged along its side end face, a metal light source support member, and a frame structure with openings to facilitate heat release, combining metal and resin frames to enhance assembly efficiency and positional accuracy while allowing for effective heat dissipation through a closed space and openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a frame is used to surround the light source support member and light guide plate, then assembly efficiency and positional accuracy are improved, but heat dissipation performance deteriorates
Solution Approach 1:
The frame is segmented into multiple parts: a first frame member that contacts the light source support member for heat conduction, and a second frame member that surrounds the light guide plate. This segmentation allows the first frame member to serve as a heat dissipation path while the second frame member provides structural support and positioning, thus resolving the contradiction between assembly efficiency and heat dissipation performance.
Solution Approach 2:
The light source support member acts as an intermediary between the light-emitting elements and the first frame member. It receives heat from the light-emitting elements and transfers it to the first frame member, which then conducts the heat away. This intermediary structure enables effective heat dissipation while maintaining the framing structure's assembly benefits.
2Temperature
If a metal light source support member is used to conduct heat, then heat dissipation is improved, but device complexity increases
Solution Approach 1:
The light source support member performs multiple functions simultaneously: it provides mechanical support for the light-emitting elements, conducts heat away from them, and serves as a mounting substrate. By integrating these functions into a single component, the design achieves effective heat dissipation without significantly increasing overall device complexity.
Solution Approach 2:
The patent merges the support function and heat conduction function into a single light source support member. This consolidation eliminates the need for separate support structures and heat sinks, thereby achieving improved heat dissipation while minimizing the increase in 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
This configuration enables efficient heat release from light-emitting elements, improving light-emitting efficiency, uniformity, and extending product life by effectively managing heat dissipation through the frame structure.
Implementation Method 1
a light source support member made of a metal that extends along the light incident portion and has a substrate holding surface which is in surface contact with the other side of the light source substrate
Implementation Method 2
the illumination device has an opening through which the closed space communicates with an outside of the illumination device
Data Source
AI summary
An illumination device of a display device is configured such that heat of light-emitting elements is dissipated via a light source substrate, a light source support member made of a metal, and a first frame made of a metal. The illumination device also includes a second frame made of a resin that is disposed such that a closed space is formed along the light source support member between the frame and the light source support member. The second frame has an opening portion that communicates with the closed space, and the first frame and a third frame each has an opening portion at a position that overlaps the opening portion of the second frame, thereby allowing heat of the light-emitting elements to be dissipated through the closed space and an opening which is formed by opening portions.