Display Device Data Line Segmentation for Power Reduction

Solution Overview

Problem

Existing display devices face increased power consumption due to higher resolution and larger screen sizes, particularly in virtual reality applications, where reducing drive time per scanning signal line is necessary while maintaining display quality and accuracy, especially for touch panels.

Innovation Solution

The implementation of a display device with two display regions and switching elements that control the electrical connection between data signal lines, allowing for reduced wiring loads and optimized data signal writing periods, thereby reducing power consumption and drive time per scanning signal line.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Use of energy by stationary object

If switching elements are provided on data signal lines to reduce wiring load, then power consumption is reduced, but drive time per scanning signal line cannot be reduced sufficiently

Engineering Contradiction:

Improvepower consumptionVSAvoiddrive time per scanning signal line

Core Design Contradiction:

Use of energy by stationary objectVSLoss of time

Solution Approach 1:

The display panel is divided into multiple display regions (first display region and second display region) with separate data signal line sets. Switching elements are strategically positioned to disconnect data signal lines between regions, segmenting the wiring load to reduce overall power consumption while enabling independent drive time optimization for each region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Switching elements on data signal lines are dynamically controlled based on the scanning sequence. When scanning the first display region, switching elements connecting to the second display region are turned off, and vice versa. This dynamic switching reduces wiring load during each scanning phase, lowering power consumption without compromising drive time performance.

Inventive Principle:

Principle #15Dynamics

2Manufacturing precision

If resolution and screen size are increased to improve display quality, then display quality is improved, but power consumption increases

Engineering Contradiction:

Improvedisplay qualityVSAvoidpower consumption

Core Design Contradiction:

Manufacturing precisionVSUse of energy by stationary object

Solution Approach 1:

The display panel is divided into multiple display regions (first display region and second display region) with separate data signal line sets. Switching elements are strategically positioned to disconnect data signal lines between regions, segmenting the wiring load to reduce overall power consumption while enabling independent drive time optimization for each region.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The scanning process operates periodically, sequentially scanning the first display region and then the second display region. During each scanning phase, switching elements are controlled to disconnect unused data signal lines, reducing wiring load and power consumption during each period while maintaining display quality through sequential updates.

Inventive Principle:

Principle #19Periodic action

3Productivity

If drive time per scanning signal line is reduced to improve frame rate, then productivity is improved, but power consumption increases due to faster switching

Engineering Contradiction:

Improveframe rateVSAvoidpower consumption

Core Design Contradiction:

ProductivityVSUse of energy by stationary object

Solution Approach 1:

Switching elements on data signal lines are dynamically controlled based on the scanning sequence. When scanning the first display region, switching elements connecting to the second display region are turned off, and vice versa. This dynamic switching reduces wiring load during each scanning phase, lowering power consumption without compromising drive time performance.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The scanning process operates periodically, sequentially scanning the first display region and then the second display region. During each scanning phase, switching elements are controlled to disconnect unused data signal lines, reducing wiring load and power consumption during each period while maintaining display quality through sequential updates.

Inventive Principle:

Principle #19Periodic action

Data Source

PatentUS11532277B2Display device having a plurality of data lines for driving a plurality of display regions

Publication Date: 2022.12.20 SHARP KK

AI summary

A display panel includes a second display region and a first display region which are arranged side by side in a direction in which data signal lines extend, and a source driver is provided at one edge of the second display region. Switches are provided between data signal lines in the first display region and data signal lines in the second display region, and the switches are turned off when an on-level scanning signal is applied to a scanning signal line in the second display region. A period during which the on-level scanning signal is applied to each scanning signal line in the second display region is shorter than a period during which the on-level scanning signal is applied to each scanning signal line in the first display region.