3D Reflective Display Dual Front Light Module

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Solution Overview

Problem

Three-dimensional reflective display devices with front light modules suffer from the formation of dark areas after light passes through the lens array, resulting in poor display quality due to obvious bright and dark stripes.

Innovation Solution

The implementation of a three-dimensional reflective display device with a front light module comprising two front light components, each with a light guide plate and a light source, where the light sources are positioned at opposite sides of the lenticular lens array, ensuring that the bright and dark zones formed by the light emitted from the two front light components are complementary.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single front light component is used in the three-dimensional reflective display device, then the device structure is simple, but dark areas are formed after light passes through the lens array, resulting in obvious bright and dark stripes on the image

Engineering Contradiction:

Improvefront light module structureVSAvoiduniformity of light distribution

Core Design Contradiction:

Device complexityVSIllumination intensity

Solution Approach 1:

The front light module is divided into two separate front light components (first front light component with first light guide plate and first light source, second front light component with second light guide plate and second light source) positioned at opposite sides of the lens array. Each component independently provides light illumination, and their combined effect eliminates the dark areas that would form with a single component, thereby resolving the contradiction between structural simplicity and lighting uniformity.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If two front light components are used in the three-dimensional reflective display device, then the light distribution uniformity is improved, but the device complexity increases

Engineering Contradiction:

Improveuniformity of light distributionVSAvoidfront light module structure

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The two front light components are merged into a single integrated front light module assembly that works together as a unified system. The first and second light guide plates are positioned with their light incident surfaces facing each other, and both components are incorporated into the same optical path through the lens array, achieving improved light distribution while managing system complexity through integrated design.

Inventive Principle:

Principle #5Merging (Combining)

3Illumination intensity

If light sources are positioned at opposite sides of the lens array, then the bright and dark zones formed by the two front light components are complementary, but the manufacturing complexity increases

Engineering Contradiction:

Improvecomplementary light zonesVSAvoidassembly difficulty

Core Design Contradiction:

Illumination intensityVSEase of manufacture

Solution Approach 1:

The positioning of light sources at opposite sides of the lens array is achieved through segmentation of the front light module into two independent components (first front light component and second front light component). This segmentation allows each component to be manufactured and positioned separately, with the first light source on one side of the lens array and the second light source on the opposite side, enabling the complementary light zone effect while managing manufacturing complexity through modular assembly.

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

This configuration reduces the likelihood of dark areas forming after light passes through the lens array, thereby preventing the appearance of obvious bright and dark stripes on the image, and significantly improves the display quality.

Implementation Method 1

The first front light component includes a first light guide plate and a first light source, where the first light guide plate has a first light incident surface

Methodology Applied

Scientific EffectLight guide: Waveguide (optics)

Implementation Method 2

The lens array is disposed on the reflective display panel and includes multiple lenticular lenses extending in a first direction and arranged in a second direction perpendicular to the first direction

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 3

The reflective display panel includes multiple pixel structures, where each of the pixel structures includes a left-eye pixel and a right-eye pixel

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20250085562A1Three-dimensional reflective display device

Publication Date: 2025.03.13 E INK HLDG INC

AI summary

A three-dimensional reflective display device includes a reflective display panel, a lens array disposed on the reflective display panel, and a front light module disposed on the lens array. The reflective display panel includes pixel structures, and each pixel structure includes a left-eye pixel and a right-eye pixel. The lens array includes lenticular lenses extending in a first direction and arranged in a second direction perpendicular to the first direction. The lenticular lenses are respectively corresponding to the pixel structures. The front light module includes two front light components. The two front light components both include a light guide plate and a light source disposed on a light incident surface of the light guide plate, where the light incident surfaces face to each other in the second direction.