Bistable Display Region Overlap for Latency Reduction

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Solution Overview

Problem

Current display controllers for bistable electro-optic displays can only use one update mode at a time and update one region of the display simultaneously, leading to inadequate responsiveness to user input and limited applicability for interactive applications.

Innovation Solution

The image on a bistable electro-optic display can be divided into multiple regions, with each region updated using a different update mode, allowing for overlapping refresh operations, enabling immediate updates without waiting for previous updates to finish.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If sequential update mode is used, then update simplicity is maintained, but update time and responsiveness deteriorate

Engineering Contradiction:
Improveupdate simplicityVSAvoidupdate time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The display is divided into multiple regions that can be updated independently and simultaneously. Each region has its own display pipe that can operate in parallel with other regions, allowing multiple refresh operations to overlap in time and significantly reducing total update time.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The patent transitions from a single-dimensional sequential update approach to a multi-dimensional parallel update approach by introducing multiple display pipes operating simultaneously. This dimensional expansion allows overlapping refresh operations and improves responsiveness without sacrificing operational simplicity.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Device complexity

If single-region update is used, then control complexity is reduced, but responsiveness to user input deteriorates

Engineering Contradiction:
Improvecontrol complexityVSAvoidresponsiveness
Core Design Contradiction:
Device complexityVSSpeed

Solution Approach 1:

The display controller is segmented into multiple independent display pipes, each capable of updating a specific region. This segmentation allows parallel processing of multiple update operations simultaneously, improving responsiveness to user input while maintaining manageable control complexity through modular architecture.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Multiple display pipes are prepared and configured in advance to handle different regions. When user input occurs, the appropriate display pipe can immediately begin updating the relevant region without waiting for other regions to finish updating, enabling immediate visual feedback.

Inventive Principle:
Principle #10Preliminary action

3Productivity

If overlapping refresh operations are implemented, then update speed improves, but device complexity increases

Engineering Contradiction:
Improveupdate speedVSAvoiddevice complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The display system is divided into multiple independent regions with dedicated display pipes for each. This segmentation enables overlapping refresh operations to proceed in parallel without interfering with each other, significantly improving update speed while keeping each individual pipe relatively simple.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Each display pipe is designed with universal functionality to handle various update modes (such as full refresh, partial refresh, gray scale updates) independently. This multi-functionality allows overlapping operations with different update modes to coexist without requiring separate specialized hardware for each function.

Inventive Principle:
Principle #6Universality (Multi-functionality)

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 approach reduces update time for display regions and minimizes latency between user input and visual feedback, enhancing the display's responsiveness and suitability for interactive applications.

Implementation Method 1

bistable electro-optic display device... a material having first and second display states differing in at least one optical property, the material being changed from its first to its second display state by application of an electric field to the material

Methodology Applied
Scientific EffectElectro-optic effect: Electro-Optic Effects

Implementation Method 2

particle-based electrophoretic displays in which one or more types of electrically charged particles are present in a fluid and are moved through the fluid under the influence of an electric field to change the appearance of the display

Methodology Applied
Scientific EffectElectrophoresis: Electrophoresis

Data Source

PatentUS8373649B2Time-overlapping partial-panel updating of a bistable electro-optic display
Publication Date: 2013.02.12 SEIKO EPSON CORP
  • US8373649B2 patent drawing
  • US8373649B2 patent drawing
  • US8373649B2 patent drawing

AI summary

A method for updating two or more regions of the display area of a bistable, electro-optic display device comprises selecting at least one first waveform for at least one pixel of a first region; (b) selecting at least one second waveform for at least one pixel of a second region; (c) updating the first region by generating and providing the first waveform to the at least one pixel of the first region; and (d) updating the second region by generating and providing the second waveform to the at least one pixel of the second region, wherein the first and second updates at least partially coincide in time. The first waveform is selected from a first drive scheme for use in a first update mode having a first period. The second waveform is selected from second a drive scheme for use in a second update mode having a second period.