Switchable Viewing-Angle Panel for Display Privacy and Sharing

Solution Overview

Problem

Electronic devices with anti-peeping functions face challenges in balancing privacy mode performance with share mode efficiency, often requiring increased power consumption due to narrow light distribution in backlights.

Innovation Solution

Incorporating a switchable panel with a first and second substrate, conductive portions, and a switching medium layer controlled by electrodes to switch between narrow and wide viewing angles, optimizing power usage and mode flexibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If backlights with narrow light distribution are used to improve privacy mode, then privacy performance is improved, but power consumption increases and share mode performance deteriorates

Engineering Contradiction:

Improveprivacy performanceVSAvoidpower consumption

Core Design Contradiction:

Object-affected harmful factorsVSUse of energy by moving object

Solution Approach 1:

The patent segments the backlight system into two independent paths: a narrow light distribution path for privacy mode and a wide light distribution path for share mode. This is achieved by providing separate first backlights and second backlights, or by using a switchable panel that can selectively control light distribution patterns, allowing each mode to use optimized lighting without compromising the other

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic switching between different light distribution modes using a switchable panel that can change its optical properties in real-time. The switchable panel transitions between a first state (enabling narrow distribution for privacy) and a second state (enabling wide distribution for sharing), allowing the system to adapt to different usage scenarios and optimize power consumption accordingly

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If backlights with narrow light distribution are used to improve privacy mode, then privacy performance is improved, but share mode performance deteriorates

Engineering Contradiction:

Improveprivacy performanceVSAvoidshare mode performance

Core Design Contradiction:

Object-affected harmful factorsVSAdaptability or versatility

Solution Approach 1:

The patent segments the backlight system into two independent paths: a narrow light distribution path for privacy mode and a wide light distribution path for share mode. This is achieved by providing separate first backlights and second backlights, or by using a switchable panel that can selectively control light distribution patterns, allowing each mode to use optimized lighting without compromising the other

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent implements dynamic switching between different light distribution modes using a switchable panel that can change its optical properties in real-time. The switchable panel transitions between a first state (enabling narrow distribution for privacy) and a second state (enabling wide distribution for sharing), allowing the system to adapt to different usage scenarios and optimize power consumption accordingly

Inventive Principle:

Principle #15Dynamics

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

The solution enables efficient switching between privacy and sharing modes without significant power increase, enhancing user experience and device versatility.

Implementation Method 1

The switching medium layer is disposed between the first substrate and the second substrate. The viewing angle switchable panel is capable of being controlled by the first electrode, the second electrode and the third electrode to be switched in a first mode or in a second mode, and the first mode and the second mode are modes with different viewing angles

Methodology Applied

Scientific EffectLiquid crystal switching: Liquid Crystals

Data Source

PatentUS20250328039A1Electronic device

Publication Date: 2025.10.23 INNOLUX CORP

AI summary

An electronic device includes a display panel and a switchable panel overlapping with the display panel. The switchable panel includes a first substrate, a second substrate, a first conductive portion, a second conductive portion and a third conductive portion. The second substrate is disposed opposite to the first substrate. The first conductive portion extends along a first direction in a top view and is disposed between the first substrate and the second substrate. The second conductive portion extends along a second direction different from the first direction in the top view and is disposed between the first substrate and the second substrate. The third conductive portion extends along the second direction in the top view and is disposed between the first substrate and the second substrate. The second conductive portion and the third conductive portion are disposed outside an active area of the display panel.