Backlight Module Split-Screen Display Power Reduction

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Solution Overview

Problem

Traditional liquid crystal display (LCD) backlight modules face challenges in achieving split-screen display and low power consumption, as existing side-type backlights are inefficient and direct-type backlights consume high power, weigh heavily, and are costly.

Innovation Solution

A backlight module comprising a light guide plate with a thicker and thinner portion, combined with a first and second light source, where the light sources are strategically positioned to optimize light distribution and power usage, allowing for split-screen functionality while reducing overall power consumption.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Volume of moving object

If side-type backlight source is used, then device size is reduced, but split-screen display function cannot be achieved

Engineering Contradiction:

Improvedevice sizeVSAvoidsplit-screen display function

Core Design Contradiction:

Volume of moving objectVSAdaptability or versatility

Solution Approach 1:

The backlight module is segmented into multiple independent light sources (first light source and second light source) positioned at different locations. The light guide plate is divided into a first light guide region and second light guide region, allowing independent control of light emission from each region to enable split-screen display functionality while maintaining a compact overall structure.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If direct type backlight source is used, then split-screen display function is achieved, but power consumption increases

Engineering Contradiction:

Improvesplit-screen display functionVSAvoidpower consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

Different regions of the light guide plate are designed with different thicknesses (first light guide region with first thickness, second light guide region with second thickness) to optimize light distribution. The light sources are strategically positioned to illuminate only the required display regions, reducing overall power consumption while maintaining split-screen capability.

Inventive Principle:

Principle #3Local quality

3Adaptability or versatility

If direct type backlight source is used, then split-screen display function is achieved, but device weight increases

Engineering Contradiction:

Improvesplit-screen display functionVSAvoiddevice weight

Core Design Contradiction:

Adaptability or versatilityVSWeight of moving object

Solution Approach 1:

The backlight module uses multiple small light sources positioned at specific locations rather than a single large direct-type backlight source. This segmentation allows the system to achieve split-screen display functionality while using less material and reducing overall device weight.

Inventive Principle:

Principle #1Segmentation

4Adaptability or versatility

If direct type backlight source is used, then split-screen display function is achieved, but manufacturing cost increases

Engineering Contradiction:

Improvesplit-screen display functionVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The backlight module is designed with multiple discrete light sources and corresponding light guide regions that can be independently manufactured and assembled. This modular approach simplifies the manufacturing process compared to a single complex direct-type backlight system, reducing production costs while achieving split-screen display functionality.

Inventive Principle:

Principle #1Segmentation

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 enables split-screen display capabilities while minimizing power consumption by combining direct and side-type backlighting, reducing the need for high-power direct-type backlights and achieving efficient light distribution through a light guide plate with varying thickness and strategically placed light sources.

Implementation Method 1

a light guide plate, a first light source and a second light source; wherein said light guide plate comprises a light emitting surface and a bottom surface which are oppositely disposed

Methodology Applied

Scientific EffectLight guidance: Waveguide (optics)

Implementation Method 2

said first portion of said light guide plate being a wedge plate

Methodology Applied

Scientific EffectRefraction: Refraction

Data Source

PatentUS10241255B2Backlight module and liquid crystal display

Publication Date: 2019.03.26 WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD

AI summary

The present disclosure discloses a backlight module and a liquid crystal display, the backlight module comprises: a light guide plate, a first light source and a second light source; wherein said light guide plate comprises a light emitting surface and a bottom surface as well as a side surface; said light emitting surface and said bottom surface define thickness of said light guide plate, said light guide plate at least comprises a first portion which is relatively thicker and a second portion which is relatively thin; said first light source is provided opposite the side of said light guide plate, said second light source is provided opposite said bottom surface or said light emitting surface of said light guide plate second portion. Through the above way, the present disclosure can achieve the split-screen display of the display device, simultaneously reducing the power consumption of the display device.