Dual-Side Organic Lighting Device for Distinct Display Backlighting

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Solution Overview

Problem

Existing lighting devices are not versatile enough to adapt to different light properties required for backlighting multiple displays, particularly in tight spaces like flip phones, where two liquid crystal displays need distinct light settings.

Innovation Solution

A lighting device with two light output sides, each emitting light with different properties, utilizing an organic layer stack, electrode layers, wavelength conversion materials, color filters, and light diffusing materials to adjust intensity, brightness, emission characteristics, and color, allowing for tailored light output for each display.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single light output side is used, then the device structure is simple, but the adaptability to different display requirements is insufficient

Engineering Contradiction:

Improveadaptability to different display requirementsVSAvoiddevice structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lighting device is divided into two independent light output sides (first light output side and second light output side), each capable of emitting light with different properties. This segmentation allows each side to be independently optimized for different display requirements while maintaining a unified device structure, resolving the contradiction between adaptability and complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different light properties are provided at different locations (sides) of the lighting device. The first light output side emits light with first properties (e.g., for first display) while the second light output side emits light with second properties (e.g., for second display). This local differentiation enables tailored lighting for specific applications without requiring completely separate devices.

Inventive Principle:

Principle #3Local quality

2Manufacturing precision

If light properties are customized for each side, then display performance is optimized, but manufacturing complexity increases

Engineering Contradiction:

Improvelight property customizationVSAvoidmanufacturing process

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The lighting device is designed as a multi-functional unit where a single device structure can provide different light properties for different displays. The organic layer stack and electrode layers are configured to enable both light output sides to emit customized light, eliminating the need for separate lighting devices for each display and simplifying manufacturing.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The light properties (wavelength, intensity, direction) are controlled by adjusting parameters of the organic layer stack and electrode layers. By changing material composition, layer thickness, and structural parameters, different light properties are achieved for each side without requiring completely different device structures, thus maintaining ease of manufacture.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If two light output sides are implemented, then versatility for backlighting multiple displays is improved, but device complexity increases

Engineering Contradiction:

Improvebacklighting capability for multiple displaysVSAvoidorganic layer stack configuration

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The lighting device merges two light output functions into a single integrated structure. The organic layer stack and electrode layers are configured to simultaneously support light emission from both the first and second light output sides, combining what would traditionally require separate devices into one unified unit, thus improving versatility without proportionally increasing complexity.

Inventive Principle:

Principle #5Merging (Combining)

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

Enables flexible light output adaptation for multiple displays, ensuring optimal backlighting with distinct light properties for each side, enhancing display performance in compact designs.

Implementation Method 1

The organic layer stack comprises at least one organic layer that is provided for generating electromagnetic radiation

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Implementation Method 2

at least one light output side of the lighting device comprises a wavelength conversion material

Methodology Applied

Scientific EffectWavelength conversion: Fluorescence

Implementation Method 3

at least one light output side of the lighting device comprises a color filter material

Methodology Applied

Scientific EffectOptical filtering: Filter (optical)

Implementation Method 4

at least one light output side of the lighting device comprises a light diffusing material

Methodology Applied

Scientific EffectLight scattering: Scattering

Data Source

PatentUS8339034B2Lighting device having two light sides and an organic layer stack

Publication Date: 2012.12.25 DOLYA HOLDCO 5 LTD

AI summary

A lighting device is disclosed, having a first light output side, a second light output side, and an organic layer stack, disposed between the first and second light output sides, wherein during operation of the lighting device, light with different light properties emerges though the first and the second light output sides.