IPS Vehicle Display Electrode Layout for Switchable Privacy Viewing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing display technologies in vehicles fail to provide effective selective operation in sharing and private modes, particularly under varying light conditions, leading to potential distractions and reduced image quality in automotive applications.

Innovation Solution

A display device with IPS technology featuring a split electrode design, allowing independent actuation of multiple electrodes to control contrast and visibility directionally, ensuring high optical performance in sharing mode and reduced visibility in private mode.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If a display device provides high visibility and contrast for all viewers in a vehicle, then information is accessible to all passengers (sharing mode), but privacy protection is compromised as unintended viewers can also perceive the content

Engineering Contradiction:

Improvevisibility of displayed informationVSAvoidunintended perception of information

Core Design Contradiction:

Loss of informationVSObject-affected harmful factors

Solution Approach 1:

The positive electrode is segmented into multiple independently controllable electrode combs within each pixel. By selectively activating specific electrode combs, the display can direct visibility to different viewing zones, enabling sharing mode when all electrodes are active and private mode when only specific electrodes are activated based on detected viewer position

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The display device dynamically adjusts electrode activation based on real-time viewer detection. The control unit receives signals from sensors (cameras, microphones, or touch sensors) and dynamically switches between sharing and private modes by activating different electrode combs, making the privacy protection adaptive to actual viewing conditions

Inventive Principle:

Principle #15Dynamics

2Object-affected harmful factors

If privacy protection measures are implemented to limit viewing angle, then unintended viewers cannot perceive information, but image quality and contrast are degraded for intended viewers

Engineering Contradiction:

Improveunintended perception of informationVSAvoidimage quality and contrast

Core Design Contradiction:

Object-affected harmful factorsVSManufacturing precision

Solution Approach 1:

Different electrode combs are positioned to create localized optical fields directed at specific viewing zones. The first electrode comb directs light toward the first viewing zone while the second electrode comb directs light toward the second viewing zone, allowing each zone to receive optimized image quality and contrast tailored to its intended viewer without affecting other zones

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

Multiple electrode combs create multiple independent light field copies for different viewing zones. Each activated electrode comb generates a complete image copy optimized for its specific viewing direction, allowing the same information to be presented with high quality to multiple viewers in different positions simultaneously

Inventive Principle:

Principle #26Copying

3Adaptability or versatility

If multiple electrode combs are implemented for directional control, then selective sharing and private modes are achieved, but device complexity increases

Engineering Contradiction:

Improveswitchable sharing and private modesVSAvoidelectrode structure and control system

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

Multiple electrode combs are merged within a single pixel structure, sharing common elements such as the transparent carrier layer, liquid crystal layer, and control circuitry. The electrode combs are arranged in an interdigitated pattern that allows compact integration without requiring separate physical structures for each electrode, reducing overall device complexity while maintaining multi-directional control capability

Inventive Principle:

Principle #5Merging (Combining)

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 maintains high display performance in sharing mode while selectively reducing visibility in private mode, addressing safety concerns and maintaining image quality under varying light conditions.

Implementation Method 1

a liquid crystals layer between the carrier layer and the cover layer

Methodology Applied

Scientific EffectLiquid crystals: Liquid Crystals

Implementation Method 2

LCD displays which have in-plane switching (IPS) technology have proven particularly effective

Methodology Applied

Scientific EffectIn-plane switching (IPS):

Data Source

PatentUS12554166B2Display device, in particular for a vehicle, with switchable sharing and private modes

Publication Date: 2026.02.17 BHTC GMBH

AI summary

The display device comprises an LCD display having a plurality of pixels and a special split electrode design, which makes it possible, using IPS technology, to influence the intensity and homogeneity of the electrical field propagating within a pixel. As a result, each pixel can switch from a sharing mode with maximum luminescence and a symmetrical viewing angle range into a private mode with reduced luminescence and an asymmetrical viewing angle range and back again, and vice versa into the sharing mode.