Backlight Module Ambient Light Integration
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Solution Overview
Problem
Conventional liquid crystal display devices experience insufficient brightness when used in sunny conditions, and increasing the brightness of the light emitting element leads to power consumption issues.
Innovation Solution
An electronic device design that incorporates a light-guide tube to harness external ambient light as a primary or auxiliary light source, complementing the existing light emitting element, allowing the backlight module to utilize both sources for enhanced luminance while conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the brightness of the light emitting element is increased to solve insufficient brightness in sunny conditions, then the brightness of the display panel is improved, but the power consumption increases
Solution Approach 1:
The patent combines two light sources (ambient light and light emitting element) into a unified backlight module. The light-guide plate integrates both ambient light entering through light-guide tubes and light from the light emitting element, merging them into a single illumination system that can adaptively use either or both sources depending on ambient conditions.
Solution Approach 2:
The light-guide plate serves multiple functions: it guides ambient light from the light-guide tubes, directs light from the light emitting element, and distributes both light sources uniformly across the display panel. This multi-functional design allows the system to use different light sources based on environmental conditions without requiring separate illumination systems.
2Illumination intensity
If the brightness of the light emitting element is increased to ensure sufficient display brightness, then the display visibility is improved, but the lifespan of the device is reduced
Solution Approach 1:
The system dynamically adapts its light source configuration based on ambient light conditions. Through sensors or control circuits, the system can switch between using primarily ambient light, primarily the light emitting element, or a combination of both, thereby optimizing the operational lifespan by minimizing light emitting element usage when ambient light is sufficient.
Solution Approach 2:
The light-guide tubes passively capture and guide ambient light into the backlight module without requiring active control or additional energy input. The system automatically utilizes available environmental light resources, reducing the need for the light emitting element to operate at high intensity and thereby extending device lifespan.
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 effectively addresses the brightness insufficiency in sunny conditions by leveraging ambient light, reducing power consumption, and prolonging the device's lifespan by using ambient light as a main source and the light emitting element as a supplementary source when needed.
Implementation Method 1
The light-guide plate guides light emitted by the light emitting element to the display panel
Implementation Method 2
The light-guide tube guides external ambient light to the light-guide plate
Data Source
AI summary
An electronic device includes a case, a display panel and a backlight module. The case has at least a hole. The display panel is disposed in the case to display information. The backlight module is disposed in the case as a light source of the display panel. The backlight module has at least a light emitting element, a light-guide plate and at least a light-guide tube. The light-guide plate guides the light emitted by the light emitting element to the display panel. The light-guide tube has a light input end and a light output end. The light input end is disposed at the hole of the case and is exposed outside, and the light output end is located at one side of the light-guide plate. Therefore, the light-guide tube can guide external environment light to the light-guide plate.