Lamp Positioning Structure for Backlight Module Brightness Uniformity
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Solution Overview
Problem
The existing lamp positioning structures for backlight modules in display devices suffer from high local brightness spots due to curved lamps, leading to reduced display quality and increased module size or volume when attempting to address these issues.
Innovation Solution
A lamp positioning structure where the rear plate is upwardly folded to form a side plate, allowing the curved section of the lamp to be positioned within the display area, with a fastening element that includes elastic arms to secure the lamp and a through hole for uniform light emission, preventing displacement and breakage while maintaining compactness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the curved section of the lamp is arranged in the non-display area to eliminate high brightness spots, then the display quality is improved, but the occupied space and volume of the backlight module increase
Solution Approach 1:
The patent utilizes the Z-dimension (depth) by folding up the rear plate to form a side plate, creating a hollow portion that accommodates the curved lamp section vertically. This allows the curved section to be positioned within the display area's vertical space rather than extending horizontally in the non-display area, thus maintaining compactness while achieving uniform brightness distribution.
Solution Approach 2:
The curved section of the lamp is nested within the hollow portion formed by folding the rear plate. The fastening element with elastic arms is then nested around the curved section, creating a compact integrated structure that fits within the display area without increasing overall module volume.
2Reliability
If rubber pads are used to fasten the straight-line section of the lamp to the rear plate, then the lamp is secured, but dark areas are generated in the display area due to light blocking
Solution Approach 1:
The patent extracts the light-blocking rubber pads from the display area and replaces them with a fastening element made of light-transmissive material. The fastening element is positioned in the hollow portion above the curved lamp section, allowing light to pass through its through hole to the display area, thus eliminating dark spots while maintaining lamp fixation.
Solution Approach 2:
The patent changes the optical parameter of the fastening material from opaque (rubber pads) to transparent or light-transmissive. This parameter change allows the fastening element to secure the lamp while simultaneously permitting light transmission to the display area, resolving the contradiction between fixation reliability and brightness uniformity.
3Volume of stationary object
If the curved section of the lamp is positioned in the display area to maintain compactness, then the device size is reduced, but high local brightness spots and dark areas are generated
Solution Approach 1:
The fastening element acts as an intermediary between the curved lamp section and the display area. Its through hole serves as a light transmission channel, mediating the light path from the curved lamp section to the display area. This intermediary structure enables the curved section to be positioned in the display area while maintaining uniform brightness by controlling light transmission through the fastening element.
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 ensures uniform brightness distribution, prevents dark spots, and allows the curved lamp section to be placed in the display area without increasing the device's size, thereby enhancing the overall display quality and compactness of the backlight module.
Implementation Method 1
The front-side portion protrudes transversely two elastic arms for abutting against the curved section
Data Source
AI summary
A lamp positioning structure is disclosed. The lamp positioning structure is assembled on a display device and includes a fastening element mounted on a side plate of a rear plate. The lamp is curve-line-shaped and is mounted over the rear plate. Moreover, the lamp includes at least a curved section. Also, a display panel having a display area is assembled over the rear plate to cover the lamp. The curved section of the lamp is arranged in the display area without damaging the brightness uniformity nearby. In addition, two elastic arms are disposed on both lateral sides of the fastening element to abut against the curved section. Through the arrangement of the positioning structure, the breakage and the displacement of the lamp can be reduced or even prevented. The brightness of the curved section corresponding to the fastening element becomes more uniform and without definite dark spots.