Barrier Panel Touch Sensing for 3D Display Thickness Reduction

Solution Overview

Problem

The integration of a touch panel with a parallax barrier panel in display apparatuses increases thickness and manufacturing costs due to the need for multiple electrode layers and substrates, complicating the provision of both touch input functionality and 3D image display without 3D glasses.

Innovation Solution

A display apparatus with a touch sensing part integrally formed with the barrier panel, using electrodes capacitively coupled to calculate coordinate information based on capacitance variations, reducing the number of electrode layers and substrates required.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a touch panel is coupled with a barrier panel, then touch input functionality is provided, but the thickness of the display apparatus increases

Engineering Contradiction:

Improvetouch input functionalityVSAvoidthickness of display apparatus

Core Design Contradiction:

Adaptability or versatilityVSLength of stationary object

Solution Approach 1:

The barrier panel and touch panel are merged into a single integrated structure where the barrier panel serves dual functions: 3D image separation and touch sensing. The touch sensing part is formed on the same substrate as the barrier pattern, eliminating the need for a separate touch panel layer and reducing overall thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The barrier panel is designed to perform multiple functions simultaneously: it acts as both the 3D image separation barrier and the touch sensing element. The electrode layer in the barrier panel serves as both the barrier structure and the touch detection component, enabling one component to fulfill multiple roles.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a touch panel is coupled with a barrier panel, then touch input functionality is provided, but the manufacturing cost increases

Engineering Contradiction:

Improvetouch input functionalityVSAvoidmanufacturing cost

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The barrier panel and touch panel are merged into a single integrated structure where the barrier panel serves dual functions: 3D image separation and touch sensing. The touch sensing part is formed on the same substrate as the barrier pattern, eliminating the need for a separate touch panel layer and reducing overall thickness.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The barrier panel is designed to perform multiple functions simultaneously: it acts as both the 3D image separation barrier and the touch sensing element. The electrode layer in the barrier panel serves as both the barrier structure and the touch detection component, enabling one component to fulfill multiple roles.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If multiple electrode layers are used for touch sensing, then touch sensitivity is improved, but the device complexity increases

Engineering Contradiction:

Improvetouch sensing capabilityVSAvoidnumber of electrode layers

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention extracts and utilizes the electrode layer already present in the barrier panel for touch sensing purposes, rather than adding a separate touch panel electrode layer. This approach eliminates redundant components while maintaining touch sensing functionality by repurposing the existing barrier electrode.

Inventive Principle:

Principle #2Taking out (Extraction)

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 configuration allows for reduced thickness and cost while maintaining touch input functionality and 3D image display capabilities, enhancing the overall efficiency and usability of the display apparatus.

Implementation Method 1

the touch sensing part includes a plurality of third electrodes disposed on the second electrodes extending in the first direction, arranged in the second direction, and capacitively coupled to the second electrodes

Methodology Applied

Scientific EffectCapacitance coupling: Capacitance

Implementation Method 2

the coordinate calculator detects a variation of a capacitance between the second electrodes and the third electrodes, and calculates coordinate information of a touch point

Methodology Applied

Scientific EffectCapacitance variation detection: Capacitance

Data Source

PatentUS9135845B2Display apparatus including barrier panel and touch sensing part

Publication Date: 2015.09.15 SAMSUNG DISPLAY CO LTD

AI summary

A display apparatus includes a display panel that displays a second image in a 3D mode, a barrier panel that forms a barrier pattern that separates the second image into a left-eye image and a right-eye image, a touch sensing part that includes third electrodes capacitively coupled to a portion of the electrodes included in the barrier panel, and a coordinate calculator. The coordinate calculator measures a variation of capacitance between the portion of the electrodes included in the barrier panel and the third electrodes.