LCD Heat Guide Member Directing LED Thermal Energy
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Solution Overview
Problem
Existing LCD devices with LED backlight units face challenges in reducing heat resistance and efficiently managing heat generated by LEDs, which affects the performance and lifespan of the devices, especially when design specifications change.
Innovation Solution
The implementation of a heat radiation layer on the rear surface of the bottom cover and a heat guide member on the front surface of the bottom cover in the LCD device, which directs heat generated by the LEDs towards the liquid crystal display panel, enhancing heat dissipation and minimizing motion blurring phenomena by increasing the internal temperature of the panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a metal plate is used as a heat radiation plate to discharge heat from LEDs, then heat dissipation is improved, but heat resistance of the backlight unit cannot be reduced below a critical value
Solution Approach 1:
The heat management system is segmented into two distinct functional components: a heat radiation plate for heat dissipation and a heat guide member for heat direction. This segmentation allows each component to be optimized independently - the radiation plate focuses on conducting heat away from LEDs while the guide member directs remaining heat toward the LCD panel, resolving the contradiction between heat dissipation and heat resistance
Solution Approach 2:
The heat guide member acts as an intermediary element between the LED light source and the LCD panel. It captures heat generated by LEDs and redirects it toward the liquid crystal layer, serving as a mediator that transforms harmful heat into a useful function (warming the liquid crystal to improve response time) while the radiation plate handles excess heat dissipation
2Duration of action of stationary object
If LEDs are used as a light source in the backlight unit, then lifespan and color temperature characteristics are improved, but performance deteriorates due to temperature increment from internally generated heat
Solution Approach 1:
The invention converts the harmful heat generated by LEDs into a beneficial effect by using the heat guide member to direct this heat toward the LCD panel. The heat that would otherwise be wasted or harmful is now used to warm the liquid crystal, improving its response characteristics. This transforms the temperature increment from a detrimental factor into a performance-enhancing feature while the radiation plate manages excess heat to prevent LED degradation
3Loss of time
If the response time of liquid crystal is reduced by increasing temperature, then motion blurring is minimized, but heat management complexity increases
Solution Approach 1:
The heat guide member serves multiple functions simultaneously: it acts as a thermal conductor, a heat redirection mechanism, and a temperature control device for the LCD panel. By integrating these functions into a single component, the invention reduces heat management complexity while achieving the dual goals of improving liquid crystal response time and managing LED heat generation
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 solution effectively reduces heat resistance, improves the heat radiation effect, and decreases the response time of liquid crystal molecules, thereby minimizing motion blurring and ensuring the reliability of the LED chips by maintaining a controlled temperature.
Implementation Method 1
a heat radiation layer formed on a rear surface of the bottom cover and configured to externally discharge the heat generated in the light source
Implementation Method 2
a heat guide member disposed on a front surface of the receiving portion of the bottom cover and configured to guide the heat generated in the light source toward the liquid crystal display panel
Implementation Method 3
minimize motion blurring phenomena and to reduce a response time of liquid crystal by increasing the temperature of an LCD panel
Data Source
AI summary
An LCD device is disclosed. The disclosed LCD device includes: a liquid crystal display panel configured to display images; a backlight unit configured to include a light source provided for emitting light and optical sheets provided for improving optical characteristics of light which is emitted by the light source; a bottom cover with a receiving portion configured to receive the liquid crystal display panel and the backlight unit; and a heat guide member disposed on a front surface of the receiving portion of the bottom cover and configured to guide the heat generated in the light source toward the liquid crystal display panel.