Reflective Element Light Source Grooves Local Dimming

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Solution Overview

Problem

Existing backlight modules struggle to effectively control the light-emitting angle of light-emitting elements, leading to interference between bright and dark areas during local dimming, which affects image contrast.

Innovation Solution

A reflective element with a body featuring a top surface, a bottom surface, and light source grooves, each containing a light outlet, a bottom, and a reflective portion with distinct first and second reflective surfaces, which surround the light-emitting elements to control the light-emitting angle.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a known backlight module is used, then the structure is simple, but the light-emitting angle cannot be effectively controlled causing interference between bright and dark areas

Engineering Contradiction:

Improvelight-emitting angle controlVSAvoidbacklight module structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The reflective element is divided into multiple light source grooves, each containing a light-emitting element. Each groove acts as an independent light control unit with its own reflective surfaces, allowing precise control of light emission angles for each local area while maintaining overall module simplicity

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reflective element serves as an intermediary component between the light-emitting elements and the display panel. It mediates the light emission by using reflective surfaces to control the light paths, preventing direct interference between adjacent light sources while achieving local dimming functionality

Inventive Principle:

Principle #24Intermediary (Mediator)

2Manufacturing precision

If light-emitting elements are arranged closely for local dimming, then the display resolution is improved, but light rays from bright areas interfere with adjacent dark areas

Engineering Contradiction:

Improvelocal dimming precisionVSAvoidlight interference

Core Design Contradiction:

Manufacturing precisionVSObject-affected harmful factors

Solution Approach 1:

Each light source groove is equipped with dedicated reflective surfaces (first and second reflective surfaces) that are specifically configured to control light emission in that local area. The reflective surfaces create distinct light emission angles for each groove, ensuring that light from bright areas does not interfere with adjacent dark areas, thereby achieving precise local dimming

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The reflective surfaces are designed in advance to redirect light rays at specific angles before they can interfere with adjacent areas. By pre-configuring the reflective geometry, the system prevents light interference proactively, allowing closely spaced light-emitting elements to be used without compromising dark area quality

Inventive Principle:

Principle #9Preliminary anti-action

3Illumination intensity

If the light-emitting angle is increased to improve brightness distribution, then the uniformity is improved, but the light-emitting angle control capability is reduced

Engineering Contradiction:

Improvebrightness uniformityVSAvoidlight-emitting angle control

Core Design Contradiction:

Illumination intensityVSEase of operation

Solution Approach 1:

The reflective surfaces are designed with specific slopes and curvatures that dynamically control light reflection angles. The first reflective surface has a different slope/curvature than the second reflective surface, creating a dynamic light distribution pattern that achieves both brightness uniformity and precise angle control simultaneously

Inventive Principle:

Principle #15Dynamics

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 reflective element achieves a small light-emitting angle and uniform light-emitting brightness, preventing interference between light rays from different areas and enhancing image contrast during local dimming.

Implementation Method 1

The reflective portion includes a first reflective surface and a second reflective surface... adapted to surround the light-emitting element

Methodology Applied

Scientific EffectLight reflection: Reflection

Data Source

PatentUS20250028201A1Reflective element

Publication Date: 2025.01.23 DARWIN PRECISIONS CORP

AI summary

A reflective element is adapted to a backlight module including a plurality of light-emitting elements. The reflective element includes a body provided with a top surface, a bottom surface, and a plurality of light source grooves. Each light source groove is provided with a light outlet, a bottom, and a reflective portion. The light outlet is formed on the top surface. The bottom is adapted to arrange the light-emitting element. The reflective portion is located between the light outlet and the bottom and is adapted to surround the light-emitting element. The reflective portion includes a first reflective surface and a second reflective surface. The first reflective surface is located between the second reflective surface and the bottom, and the second reflective surface is located between the first reflective surface and the light outlet. The first reflective surface and the second reflective surface have different slopes or curvatures.