Reflective Transmissive Pixel Segmentation for Display Power Quality

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Solution Overview

Problem

Current display devices face challenges in achieving low power consumption and high display quality, particularly in environments with varying light conditions, as they often rely on either reflective or transmissive technologies that are not optimally suited for all lighting scenarios.

Innovation Solution

A display device structure incorporating adjacent pixels with distinct display regions, where one pixel reflects light and the other emits light, utilizing a reflective liquid crystal layer and a transmissive light-emitting layer respectively, and connected to different transistors for independent control, with an oxide semiconductor film in the channel region to enhance performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a transmissive liquid crystal display device is used, then display quality is improved, but power consumption increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The display device is divided into two distinct pixel types: reflective pixels and transmissive pixels. Each pixel type is dedicated to a specific display mode, allowing the system to segment the display function according to lighting conditions. This segmentation enables selective use of reflective mode during daytime to save power and transmissive mode during nighttime for better display quality.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The display device dynamically switches between reflective and transmissive modes based on ambient light conditions. By making the display mode adjustable and adaptive rather than fixed, the system can optimize both power consumption and display quality according to real-time environmental conditions, resolving the contradiction between the two parameters.

Inventive Principle:

Principle #15Dynamics

2Use of energy by moving object

If a reflective display technology is used, then power consumption is reduced, but display quality deteriorates in low light conditions

Engineering Contradiction:

Improvepower consumptionVSAvoiddisplay quality

Core Design Contradiction:

Use of energy by moving objectVSMeasurement precision

Solution Approach 1:

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The display device achieves multi-functionality by incorporating both reflective and transmissive capabilities within the same device. This universal design allows the display to adapt to various lighting conditions and usage scenarios, providing low power consumption in bright environments and high display quality in dark environments, thus resolving the contradiction between power consumption and display quality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If both reflective and transmissive display elements are provided in each pixel, then adaptability to different lighting conditions is improved, but device complexity increases

Engineering Contradiction:

Improveadaptability to lighting conditionsVSAvoidpixel structure

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Instead of combining both reflective and transmissive elements within each pixel, the invention segments the display into separate reflective pixels and transmissive pixels. This segmentation simplifies the structure of individual pixels while achieving adaptability at the display level, resolving the contradiction between adaptability and device complexity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The conventional approach of making each pixel multi-functional is inverted by making each pixel single-functional but the overall display multi-functional. This inversion simplifies the pixel structure and manufacturing process while maintaining the ability to adapt to different lighting conditions through the combination of different pixel types.

Inventive Principle:

Principle #13The other way round (Inversion)

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 enables a display device with low power consumption and high display quality by leveraging reflective and transmissive technologies in tandem, optimizing performance across different lighting conditions.

Implementation Method 1

The first display region is configured to reflect incident light

Methodology Applied

Scientific EffectReflection: Reflection

Implementation Method 2

The second display region is positioned inside the first display region and configured to emit light

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS9837478B2Display device and manufacturing method thereof

Publication Date: 2017.12.05 SEMICON ENERGY LAB CO LTD

AI summary

Provided is a novel display device that is highly convenient or reliable or a display device with low power consumption and high display quality. The display device includes a first pixel and a second pixel. The first pixel and the second pixel are adjacent to each other. Each of the first pixel and the second pixel includes a first display region and a second display region. The first display region is configured to reflect incident light. The second display region is positioned inside the first display region and configured to emit light. A position of the second display region inside the first display region in the first pixel and a position of the second display region inside the first display region in the second pixel are different from each other.