Dual Light-Guiding Layer Display for Uniform Multi-Image Conversion

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Solution Overview

Problem

Electronic appliances with direct type display units face challenges in maintaining uniform optical quality and increasing production costs due to the need for multiple LEDs, which can lead to uneven light distribution and halftone issues.

Innovation Solution

The use of a dual light-guiding layer system where the second light-guiding layer has a thickness 25% to 45% greater than the first, along with light shielding units and materials like polycarbonate, polyurethane, and polymethyl methacrylate, to ensure uniform light distribution and efficient image display.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple LEDs are disposed on the rear surface of the display unit to display various functions, then the display capability is improved, but the production cost increases and optical quality becomes uneven

Engineering Contradiction:

Improvedisplay capabilityVSAvoidproduction cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

Multiple LED light sources are merged into a single light source by using a light guiding layer that can guide light from one LED to display multiple different images. This reduces the number of LEDs needed while maintaining the ability to display various functions and information.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

A light guiding layer is introduced as an intermediary component between the LED light source and the display unit. This light guiding layer receives light from a single LED and guides it to display multiple different images, enabling one LED to perform the function of multiple LEDs.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If multiple LEDs are disposed on the rear surface of the display unit, then the display capability is improved, but the optical quality becomes uneven and halftone occurs

Engineering Contradiction:

Improvedisplay capabilityVSAvoidoptical quality

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Illumination intensity

If the second light-guiding layer has a greater thickness than the first, then the light intensity is improved, but the structural complexity increases

Engineering Contradiction:

Improvelight intensityVSAvoidstructural complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The light guiding layers are designed with different local thicknesses optimized for their specific functions. The first light guiding layer has a thickness optimized for guiding light from the LED, while the second light guiding layer has a greater thickness (25% to 45% greater) optimized for providing sufficient light intensity to the display unit. This local optimization allows each layer to perform its function efficiently without requiring the entire structure to be complex.

Inventive Principle:

Principle #3Local quality

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 enhances optical uniformity and reduces production costs by optimizing light intensity and distribution, allowing for multiple images to be selectively displayed with improved brightness and luminance.

Implementation Method 1

a first light-guiding layer that is disposed to be below a screen; a second light-guiding layer that is disposed below the first light-guiding layer

Methodology Applied

Scientific EffectLight guidance: Waveguide (optics)

Implementation Method 2

the second light-guiding layer has a thickness that is 25% to 45% greater than a thickness of the first light-guiding layer such that an intensity of light that is emitted from the at least one light source and introduced into the second light-guiding layer is greater than an intensity of light that is emitted from the at least one light source and introduced into the first light-guiding layer

Methodology Applied

Scientific EffectRefraction: Refraction

Implementation Method 3

a light shielding unit configured to guide the first light and the second light to the first light-guiding layer and the second light-guiding layer, respectively

Methodology Applied

Scientific EffectLight shielding and guidance: Reflection

Data Source

PatentUS9989694B2Electronic appliance

Publication Date: 2018.06.05 SAMSUNG ELECTRONICS CO LTD

AI summary

There is provided an electronic appliance having an improved structure enabling multi-image conversion. The electronic appliance includes a display device configured to display a plurality of images, wherein the display device includes first and second images that are selectively displayed on a screen. A first light-guiding layer is disposed between the screen and a second light-guiding layer, and two light sources disposed to selectively illuminate the first light-guiding layer and the second light-guiding layer. The second light-guiding layer has a thickness that is 25% to 45% greater than a thickness of the first light-guiding layer such that an intensity of light that is emitted from the first light source and introduced into the second light-guiding layer is greater than an intensity of light that is emitted from the second light source and introduced into the first light-guiding layer.