Backlight Assembly Thermal Equilibrium via Intermediary Heat Conduction
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Solution Overview
Problem
Light emitting diode packages experience a variation in color coordinate and light intensity due to increased heat generation over time, leading to a decrease in light emission efficiency.
Innovation Solution
Incorporating a third heat conduction member that connects and maintains thermal equilibrium between first and second heat conduction members, allowing for efficient heat discharge and minimizing light intensity variation between diodes, thus stabilizing the color coordinate of the emitted light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If light emitting diodes operate for extended periods, then light emission function is maintained, but heat accumulates causing light intensity to decrease and color coordinate to vary
Solution Approach 1:
A heat conduction member is introduced as an intermediary between the light emitting diodes and the housing. This mediator efficiently transfers heat from the diodes to the housing, which has higher heat resistance, thereby preventing heat accumulation at the diode location and maintaining stable light emission characteristics over extended operating periods
2Reliability
If heat is not effectively managed, then device structure remains simple, but light intensity variation increases and color coordinate stability deteriorates
Solution Approach 1:
The housing serves multiple functions: it provides structural support for the light emitting diodes and simultaneously acts as a heat sink due to its higher heat resistance. By integrating the heat dissipation function into the existing housing structure, the patent achieves reliable color coordinate stability without significantly increasing device complexity
3Illumination intensity
If multiple light emitting diodes are used to emit different color lights, then white light can be generated, but heat generation increases causing unequal light intensity variation between diodes
Solution Approach 1:
The heat conduction member provides localized heat management at each light emitting diode location. By ensuring each diode has adequate heat dissipation pathways through the heat conduction member to the housing, the patent maintains consistent light intensity across different colored LEDs, preventing unequal variation that would otherwise occur due to differential heat accumulation
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
The solution effectively maintains thermal equilibrium, reducing light intensity variation and preventing changes in color coordinate, ensuring consistent light emission over time.
Implementation Method 1
a heat conduction member, connected to the first and second light emitting units to conduct heat generated from the first and second light emitting units
Data Source
AI summary
A backlight assembly includes a first light emitting unit having a first light emitting diode, a second light emitting unit having a second light emitting diode, a third heat conduction member, and a receiving container accommodating the first light emitting unit and the second light emitting unit. The first light emitting unit includes a first heat conduction member connected to the first light emitting diode to absorb a heat from the first light emitting diode, and the second light emitting unit includes a second heat conduction member connected to the second light emitting diode to absorb a heat from the second light emitting diode. A third heat conduction member is connected to the first and second heat conduction members to discharge the heats from the first and second light emitting diodes.