Multiview Display Offset Rows Reduce Brightness Flicker

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Solution Overview

Problem

Multiview displays experience brightness flicker due to polarity inversion protocols, which can affect the quality of the images displayed, especially when adjacent pixels have the same polarity.

Innovation Solution

The implementation of multibeam emitters arranged in offset rows within the multiview display, where the offset distance corresponds to the distance between repeating polarities of the polarity inversion protocol, ensures that adjacent image pixels are driven with different polarities, reducing or eliminating brightness flicker.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If polarity inversion protocol is used to drive adjacent pixels, then display quality is improved, but brightness flicker occurs when adjacent pixels have the same polarity

Engineering Contradiction:

Improvedisplay qualityVSAvoidbrightness flicker

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The patent applies asymmetry by offsetting alternating rows of multibeam emitters relative to each other. This asymmetric arrangement ensures that adjacent pixels driven with the same polarity do not share identical spatial positions, thereby eliminating the brightness flicker caused by symmetric polarity inversion while maintaining display quality.

Inventive Principle:

Principle #4Asymmetry

2Illumination intensity

If multibeam emitters are arranged in offset rows, then brightness flicker is reduced, but device complexity increases

Engineering Contradiction:

Improvebrightness flicker reductionVSAvoidemitter arrangement complexity

Core Design Contradiction:

Illumination intensityVSDevice complexity

Solution Approach 1:

The patent segments the multibeam emitter array into alternating rows with different offset positions. This segmentation approach allows the complexity to be managed through systematic row-based patterning rather than random complex arrangements, making the offset configuration more manufacturable while maintaining flicker reduction benefits.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different rows of multibeam emitters have different local offset qualities - alternating rows are offset by different amounts relative to a reference position. This local quality variation across rows achieves the overall flicker reduction goal while maintaining a relatively simple global structure that is easier to manufacture.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS11232729B2Multiview display and method with offset rows of multibeam emitters and multiview pixels

Publication Date: 2022.01.25 LEIA SPV LLC

AI summary

A multiview display and method employ light valves configured to be driven according to a polarity inversion protocol along with multibeam emitters arranged in offset rows. The multiview display includes an array of the multiview pixels comprising the light valves and a multibeam backlight having a plurality of the multibeam emitters arranged in the offset rows. A method of multiview display operation includes emitting directional light beams using an array of multibeam elements in offset rows and modulating the directional light beams using an array of light valves to display an image. Sets of light valves of the light valve array correspond to multiview pixels of the multiview display and the light valve array is driven according to a polarity inversion protocol. In both the multiview display and the method, adjacent offset rows are offset by a distance between repeating polarities of the plurality inversion protocol in a row direction.