Slim LCD Backframe Integrating Heat Dissipation and Light Deflection
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Solution Overview
Problem
The prior art liquid crystal display devices face challenges due to the additional thickness and increased manufacturing cost of the heat dissipating bracket, as well as the need for additional LED driving circuits and conductive wires, which hinder slim design and increase costs.
Innovation Solution
The liquid crystal display device incorporates a waveguide, optical film, liquid crystal display panel, backframe, middle frame, printed circuit board, light source, deflector, and reflector, where the light source is mounted on the printed circuit board, and a deflector is used to direct the light beam into the waveguide, optimizing space usage and reducing material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a heat dissipating bracket is added to the LCD device, then heat dissipation performance is improved, but device thickness increases and manufacturing cost increases
Solution Approach 1:
The patent combines the heat dissipation function with the existing backframe structure by integrating a heat dissipation plate into the backframe, eliminating the need for a separate heat dissipating bracket. This merging approach maintains effective heat dissipation while reducing overall device thickness and simplifying the structure.
Solution Approach 2:
The backframe is designed to serve multiple functions: structural support, heat dissipation (through the integrated heat dissipation plate), and mounting for optical components. This multi-functionality eliminates the need for dedicated heat dissipating brackets while maintaining thermal management performance.
2Illumination intensity
If LED driving circuit and conductive wires are added to power the LED module, then light source functionality is achieved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent integrates the LED driving circuit directly onto the printed circuit board that also carries the LCD driver circuitry. This consolidation eliminates the need for separate LED driving circuits and reduces the number of conductive wires required, thereby simplifying the overall device structure while maintaining full LED functionality.
3Adaptability or versatility
If additional components are added to the LCD device, then functionality is improved, but material cost increases
Solution Approach 1:
The backframe is designed as a multi-functional component that provides structural support, heat dissipation through an integrated heat dissipation plate, and mounting for optical elements. This universality reduces the need for separate dedicated components, thereby lowering material costs while maintaining or enhancing overall device functionality.
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 allows for effective use of internal space, reduces material costs, and achieves a slim and compact design by integrating the light source and driving modules on the printed circuit board, enhancing light utilization efficiency.
Implementation Method 1
The deflector is disposed within the receiving space so as to direct the light beam projected from the light source into the light inlet surface of the waveguide
Implementation Method 2
The reflector is disposed between the bottom surface of the waveguide and the base plate of the backframe
Data Source
AI summary
The present invention provides a liquid crystal display device which includes a waveguide, a liquid crystal display panel, a backframe, a middle frame, a printed circuit board, a light source and a deflector. The backframe includes a base plate which is arranged adjacent to a bottom surface of the waveguide and sidewall arranged adjacent to the light inlet surface of the waveguide. The base plate is defined with an opening. The middle frame includes a supporting portion and positioning portion which defines a receiving space with the backframe. The receiving space is corresponding to the through the opening. The printed circuit board is arranged on the outside of the base plate. A deflector is arranged within the receiving space. The base plate is defined with an opening, the light source can be mounted onto the printed circuit board close to the base plate through the opening. Accordingly, a compact, slim design of a liquid crystal display device is achieved with reduced cost.