Movable Backlight Board Damping for Quiet Display Assemblies
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Solution Overview
Problem
The friction noise generated between a movable backlight unit and the rear chassis in display apparatuses, such as those with OLED or LCD panels, is a significant issue that affects noise levels and assembly time.
Innovation Solution
Incorporating a sound-absorbing layer between the light source board and the rear chassis, which is attached to the light source board and made of materials like epoxy, to reduce friction noise and prevent metal-to-metal contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light source board is periodically moved closer to the rear chassis based on periodically applied power, then the light intensity can be adjusted, but friction noise is generated between the light source board and the rear chassis
Solution Approach 1:
A sound-absorbing layer is introduced as an intermediary component between the light source board and the rear chassis. This layer absorbs the friction noise generated during the periodic movement of the light source board, thereby reducing the harmful noise while allowing the light intensity adjustment function to continue operating.
Solution Approach 2:
The friction noise, which is originally a harmful byproduct of the periodic movement, is converted into a beneficial effect by the sound-absorbing layer. The layer absorbs the noise energy and converts it into thermal energy through internal friction, thereby eliminating the harmful acoustic output while preserving the functional movement.
2Object-generated harmful factors
If a sound-absorbing layer is added between the light source board and the rear chassis to reduce friction noise, then noise is reduced, but assembly complexity increases
Solution Approach 1:
The sound-absorbing layer is merged with the light source board assembly, where it is positioned and attached as part of the integrated structure. This merging approach simplifies the overall assembly process by combining multiple functions (light emission and noise absorption) into a unified component system, reducing the number of separate assembly steps.
Solution Approach 2:
The sound-absorbing layer is pre-positioned and pre-attached to the light source board before the final assembly with the rear chassis. This preliminary action ensures that the noise reduction function is already in place, simplifying the final assembly process and ensuring proper positioning without requiring additional adjustment steps.
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 sound-absorbing layer effectively reduces friction noise and minimizes the increase in production and assembly time, enhancing the overall performance and efficiency of the display apparatus.
Implementation Method 1
a sound-absorbing layer positioned on the light source board so as to reduce noise caused by the light source board and the rear chassis
Implementation Method 2
a light source configured to emit light periodically by power of a power source periodically applied so as to adjust the intensity of the light
Implementation Method 3
a light emitter configured to convert a wavelength of light emitted from the light source into a plurality of different wavelengths
Data Source
AI summary
A display apparatus includes: a display panel; a rear chassis configured to support the display panel; and a light source module positioned on the rear chassis. The light source module includes: a light source configured to emit light periodically by power of a power source periodically applied so as to adjust an intensity of the light, a light source board electrically connectable with the light source, the light source board configured to be periodically moved at least partially closer to the rear chassis based on the power of the power source periodically applied to the light source, and a sound-absorbing layer positioned on the light source board so as to reduce noise caused by the light source board and the rear chassis.