Backlight Connector Beveling for Uniform Illumination
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Solution Overview
Problem
Connectors used to link multiple mounting boards in illumination devices can block light from LEDs, causing uneven brightness on diffusion plates, which is a challenge in large-area illumination setups.
Innovation Solution
The connectors are designed to be placed in a non-interfering position by forming beveled, rounded, or stepped edges that avoid the light emitting region, or by reducing their height, ensuring they do not obstruct the light path to the diffusion plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple mounting boards are connected with connectors to illuminate large areas, then the illumination area is expanded, but the connectors block light and cause uneven brightness on the diffusion plate
Solution Approach 1:
The connector is designed with a through-hole structure that allows light to pass through its body. The through-hole creates a light transmission path through the connector, enabling light from LEDs on one mounting board to pass through the connector and illuminate the diffusion plate, thereby eliminating the shadow effect while maintaining electrical connection functionality.
Solution Approach 2:
The through-hole in the connector acts as an intermediary light transmission channel. It mediates between the LED light source and the diffusion plate by allowing light to pass through the connector body, thus resolving the conflict between electrical connection and light transmission requirements.
2Reliability
If connectors are placed to electrically connect mounting boards, then electrical connectivity is achieved, but light path is obstructed causing shadows on diffusion plate
Solution Approach 1:
The connector incorporates a through-hole that creates a light transmission dimension through its body. This allows the connector to simultaneously fulfill electrical connection and light transmission functions by adding a light-passing pathway through the connector structure.
Solution Approach 2:
The connector is designed to perform multiple functions: electrical connection between mounting boards and light transmission to the diffusion plate. The through-hole structure enables the connector to serve both purposes without compromising either function.
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 prevents light blocking by connectors, maintaining even brightness on the diffusion plate and enhancing image quality in display devices and television receivers.
Implementation Method 1
a light source which irradiates the diffusion plate with light... the light emitting element is an LED
Implementation Method 2
a diffusion lens that covers the light emitting element... light from the diffusion lens forms the irradiation light region
Data Source
AI summary
A backlight unit (49) of a display device (69) having a liquid crystal display panel (59) is provided with a chassis (41), a diffusion plate (43) supported by the chassis, and a light source which irradiates the diffusion plate with light. The light source is constructed by combining a plurality of mounting substrates (21) provided with an LED (22) which serves as the light-emitting element and a diffusion lens (24) for covering the LED. Connectors (25A) are mounted on matching edges of the plurality of mounting substrates to electrically connect the substrates. The connectors are placed so as not to interfere with the illumination light region in which the LED imparts brightness to the diffusion plate. In order to achieve this state of non-interference, a beveled part (26) is formed on the side of the connectors facing the LED.