Flexible PCB Light Source Module for Mirror Displays
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Solution Overview
Problem
Conventional display modules, such as those used in mirrors, require separate display spaces and complex manufacturing processes, and suffer from reduced reflectivity and brightness due to the integration of LCDs with reflective layers, leading to deteriorated characteristics and increased costs.
Innovation Solution
A light source module with a flexible printed circuit board mounting multiple light emitting chips, allowing for high visibility and flexibility without the need for additional display space, by using a reflective member and mold member to enhance light emission and bending capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LCDs are integrated with reflective layers in display modules, then display functionality is achieved, but reflectivity and brightness are reduced
Solution Approach 1:
The patent extracts the display function from the reflective layer by using separate light emitting chips mounted on a flexible printed circuit board. This allows the reflective layer to maintain its full reflectivity while the display function is provided by the LED chips, eliminating the trade-off between display functionality and brightness.
2Loss of information
If separate display spaces are used in mirrors, then display information can be shown, but manufacturing complexity increases
Solution Approach 1:
The patent merges the display function with the light source by integrating light emitting chips directly into the mirror assembly. This eliminates the need for separate display spaces and reduces manufacturing complexity, as the LED chips serve both as illumination sources and display elements.
3Reliability
If rigid circuit boards are used for mounting light emitting chips, then electrical connection is stable, but flexibility and bending capability are lost
Solution Approach 1:
The patent uses a flexible printed circuit board instead of a rigid circuit board to mount the light emitting chips. This flexible substrate maintains electrical connection stability while enabling the mirror to be bent or conform to different shapes, providing both reliability and adaptability.
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 provides improved visibility, reduced manufacturing complexity, and cost-effectiveness by integrating light emitting chips directly on the flexible printed circuit board, enabling a bendable display module that maintains high reflectivity and brightness without separate display spaces.
Implementation Method 1
A light emitting diode (LED), which is a diode that is mounted on a printed circuit board and emits light when a current is applied thereto
Implementation Method 2
a light emitting element in which electrons are excited to a higher energy level when minority carriers are injected into an active layer of the light emitting element, and when the electrons return to a stable state again, energy owned by the electrons is converted into electromagnetic waves having wavelengths of light
Implementation Method 3
by using a reflective member and mold member to enhance light emission
Data Source
AI summary
A light source module according to an embodiment includes: a flexible printed circuit board that has first and second pads; and a plurality of light emitting chips that are arranged on the first pads of the flexible printed circuit board, respectively, wherein the plurality of light emitting chips include a plurality of first arrays that are arranged in a first direction and second arrays that are arranged in a second direction that is different from the first direction, at least two of light emitting chips in each first array are connected to each other by the flexible printed circuit board, light emitting chips in each second array are electrically isolated from each other, the light source module further includes connection members, each of which is connected to at least one of the light emitting chips of the second array and a corresponding second pad of the flexible printed circuit board, and the connection members extend in the second direction.