LCD Backlight Insulating Sheet Eliminates Partition Wall
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Solution Overview
Problem
The existing configurations for reducing the thickness and overall size of liquid crystal display devices face challenges in achieving accurate LED arrangement and preventing short circuits between electronic components and LEDs, leading to increased device size due to the need for partition walls and additional space for safety.
Innovation Solution
A liquid crystal display device configuration that eliminates the partition wall by using an insulating sheet between the electronic components and LEDs, allowing for precise LED placement without the risk of short circuits and reducing the overall device size by eliminating unnecessary space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition wall is formed between the electronic component and the LED to prevent short circuits, then the reliability is improved, but the overall size of the device is increased
Solution Approach 1:
An insulating sheet is introduced as an intermediary component between the electronic component and the LED. This insulating sheet serves as a mediator that prevents direct contact and potential short circuits while occupying minimal space, thus maintaining reliability without significantly increasing the overall device size.
Solution Approach 2:
The insulating function is extracted from the structural partition wall concept and implemented through a dedicated insulating sheet layer. This separation of functions allows the shielding layer to focus on electrical isolation while the structural framework maintains compact dimensions, resolving the contradiction between reliability and size.
2Length of moving object
If the LED is placed on a side surface of the light guide panel by folding the main flexible wiring substrate, then the device thickness is reduced, but the manufacturing precision of LED arrangement deteriorates
Solution Approach 1:
The device is segmented into distinct functional layers: the main flexible wiring substrate folded to reduce thickness, and a separate insulating sheet layer that provides a stable mounting surface for the LED. This segmentation allows the LED to be positioned with high precision on the insulating sheet while the overall device maintains reduced thickness through the folded substrate configuration.
Data Source
AI summary
A liquid crystal display device includes a liquid crystal display panel on a mold, and a backlight placed in the mold. The backlight includes a light guide panel, an LED provided on a side surface of the liquid guide panel, and other components. A main flexible wiring substrate is attached to the liquid crystal display panel, and extends to a back surface of the mold. The LED is mounted on an LED flexible wiring substrate. At least one electronic component mounted on the main flexible wiring substrate is arranged on an end surface of the mold. Then, an insulating sheet is provided between the at least one electronic component and the LED to prevent short circuit between them, instead of using a partition wall for electrical insulation.