Staggered Light Exit Structures for Indicator Lamp Backlight
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Solution Overview
Problem
Conventional backlight modules for indicator lamps in Bluetooth audio devices have a short maintenance cycle and low inspection efficiency due to the concurrent operation of RGB light beads, which quickens their service life consumption and requires sequential color switching during factory inspection.
Innovation Solution
A backlight module design featuring edge-type light sources, staggered light exit structures with different colors, and snap-fitting positions, which reduces thickness and allows simultaneous illumination of light exit structures for efficient inspection and extended maintenance cycle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple RGB light beads operate concurrently to display different connection statuses, then the indicator lamp can show multiple states simultaneously, but the service life of the light beads is consumed faster and the maintenance cycle is shortened
Solution Approach 1:
The patent divides the light display system into multiple independent light guides (first light guide, second light guide, etc.), each with its own light source. Instead of having all RGB light beads operate simultaneously, separate light guides are used to display different connection statuses (e.g., first light guide for connected state, second light guide for unconnected state). This segmentation allows multiple states to be displayed while reducing the operational burden on individual light sources, thereby extending their service life.
2Measurement precision
If RGB light beads switch between different colors sequentially for inspection, then each color can be inspected for normality, but the inspection process cannot be completed at one time and inspection efficiency is low
Solution Approach 1:
The patent segments the light display system into multiple independently controllable light guides with different colors. During inspection, each light guide can be activated separately to verify its light-emitting function. This segmentation enables inspectors to check multiple colors and functions systematically without requiring sequential switching of a single multi-color light bead, thereby improving inspection efficiency while maintaining thoroughness.
Solution Approach 2:
Each light guide is designed to serve multiple inspection purposes. For example, the first light guide can be used to inspect both the connected state indication and the overall light-emitting function, while the second light guide inspects the unconnected state indication. This multi-functionality allows a single inspection process to verify multiple aspects of the indicator lamp's performance simultaneously, improving both efficiency and comprehensiveness.
3Device complexity
If a conventional backlight module structure is used, then the construction is simple, but the thickness cannot be reduced and integration with the lamp cover is limited
Solution Approach 1:
The patent employs a nested structure where the light guide is positioned within the lamp cover, and the light guide itself contains multiple light guides arranged in a nested configuration. The first light guide is disposed in the lamp cover, and the second light guide is disposed in the first light guide, creating a compact layered structure. This nesting approach significantly reduces the overall thickness of the backlight module while maintaining all necessary functional components.
Solution Approach 2:
Instead of expanding the backlight module in the thickness direction, the patent transitions to a planar arrangement where multiple light guides are disposed side-by-side or in overlapping configurations within the same thickness plane. The light guides are arranged radially or concentrically, utilizing the lateral dimensions of the lamp cover to accommodate multiple light-emitting elements without increasing overall thickness, thus achieving a thin-profile design.
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 design prolongs the maintenance cycle of the backlight module and improves inspection efficiency by enabling simultaneous color display and reducing the need for concurrent operation of light sources, thus lowering costs and time for manufacturers.
Implementation Method 1
the edge-type light sources are disposed at the outer circumference of light-incident ends of the first light exit structure and the second light exit structure, respectively, the edge-type light sources are used to illuminate the light-incident ends of the first light exit structure and the second light exit structure, respectively
Implementation Method 2
the first light exit structure comprises a first light-guiding film and at least two first protrusions which are of an integral structure, the at least two first protrusions are circumferentially arrayed on the outer circumference of the first light-guiding film
Data Source
AI summary
The present disclosure provides a backlight module of an indicator lamp, comprising a circuit board, edge-type light sources, a first light exit structure and a second light exit structure, the edge-type light sources are electrically connected to the circuit board, the edge-type light sources are disposed at an outer circumference of light-incident ends of the first light exit structure and the second light exit structure, respectively, the edge-type light sources are used to illuminate the light-incident ends of the first light exit structure and the second light exit structure, respectively, the light-incident ends of the first light exit structure and the second light exit structure are disposed staggered, colors of the first light exit structure and the second light exit structure are different, the first light exit structure is disposed on the circuit board, the first light exit structure is provided with a first yielding hole, the first light exit structure is provided with a first bright area, the second light exit structure is disposed on the first light exit structure, the second light exit structure is provided with a second yielding hole for receiving the first bright area, and the second light exit structure is provided with a second bright area. The present disclosure, by providing the first light exit structure and the second light exit structure, slows down the consumption speed of the service life of the edge-type light sources and improves the inspection efficiency of the inspection process before shipment.