Backlight Module for Lens Test Device
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Solution Overview
Problem
Conventional liquid crystal display technology is not suitable for testing lens modules using infrared light, limiting the evaluation of lens modules with infrared test cards.
Innovation Solution
A test device with a backlight module that includes separate visible and infrared light sources, allowing for time-shared or simultaneous display of visible and infrared light, enabling the evaluation of lens modules using infrared test cards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional liquid crystal display technology is used, then visible light display is achieved, but infrared light display capability is lost
Solution Approach 1:
The patent combines visible light source (LED) and infrared light source (IR LED) into a single backlight module, allowing the display device to emit both visible and infrared light. This merging enables the display to support both visible light testing and infrared light testing without requiring separate display systems, thereby resolving the contradiction between adaptability and reliability.
Solution Approach 2:
The display device is designed with multi-functional capability by incorporating both visible light display function and infrared light display function through the dual light source backlight module. This universal design allows the same display device to perform multiple types of lens module testing (both visible and infrared), eliminating the limitation of conventional single-function displays.
2Adaptability or versatility
If a single light source is used in the backlight module, then device complexity is reduced, but the ability to display both visible and infrared light simultaneously is lost
Solution Approach 1:
The patent merges two different light sources (visible LED and infrared LED) into a single integrated backlight module structure. They share common components including the light guide plate, diffuser plate, and control circuitry, while only requiring separate light source elements. This merging approach enables dual wavelength display capability without proportionally increasing device complexity.
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
Enables the effective testing and evaluation of lens modules by displaying images captured by the lens module in both visible and infrared light, overcoming the limitations of traditional liquid crystal display technology.
Implementation Method 1
a second light source (433) for providing infrared light
Implementation Method 2
a first light source (431) for providing visible light
Data Source
AI summary
A test device for a lens module in respect of visible light and in respect of infrared light includes a test fixture and a display able to show both types of light in images captured. The test fixture supports the lens module. The display is configured to display pictures of test cards captured by the lens module. The display includes a display panel and a backlight module located on a side of the display panel. The backlight module includes a first light source and a second light source, the first light source emits visible light, and the second light source emits infrared light.