Switchable 3D Display With Common Driving Electrode Touch Sensor
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Solution Overview
Problem
Current display devices with touch sensor functions and 3D image capabilities lack the ability to seamlessly switch between 3D and 2D image displays while allowing user input, requiring separate modules for image display and touch sensing.
Innovation Solution
A display device configuration that integrates a pixel portion with organic EL elements, a liquid crystal lens portion for display switching, and a touch sensor portion using a common driving electrode, allowing for switchable 3D and 2D image display and simultaneous object detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate modules are used for image display and touch sensing, then device functionality is complete, but device thickness and complexity increase
Solution Approach 1:
The patent combines the touch sensor function and image display function into a single integrated module. The touch sensor layer is positioned above the liquid crystal layer, allowing both touch detection and light transmission to occur through the same structural assembly, thereby reducing the number of separate modules and overall device thickness.
Solution Approach 2:
The liquid crystal layer serves dual functions: it acts as the display medium for image rendering and simultaneously serves as the sensing layer for touch detection. By making the liquid crystal layer responsive to both optical properties and touch input, the patent eliminates the need for a separate touch sensor module, reducing device complexity while maintaining complete functionality.
2Adaptability or versatility
If a liquid crystal lens portion is used for display switching, then 3D and 2D display switching is enabled, but device complexity increases
Solution Approach 1:
The patent merges the display switching function into the existing liquid crystal layer by controlling its molecular orientation through electric fields. The same liquid crystal layer that performs display function is also used for 3D/2D switching, eliminating the need for separate switching mechanisms or additional optical components.
Solution Approach 2:
The liquid crystal layer's optical properties are dynamically adjusted by applying different voltages to achieve different display modes. By changing the orientation of liquid crystal molecules through electric field control, the system can switch between 3D and 2D display modes without mechanical moving parts or additional complex mechanisms.
3Use of energy by moving object
If organic EL elements are used in pixels, then power consumption is reduced and thinning is realized, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs organic EL elements that operate at lower voltages (10V or less) compared to traditional display technologies. By changing the electrical parameters of the display elements to use organic materials with lower operating voltages, the system achieves reduced power consumption and thinner profile while the manufacturing precision challenges are addressed through specialized fabrication processes for organic thin films.
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
Enables user input during switchable 3D and 2D image display by utilizing a common driving electrode for both display switching and touch sensing, reducing device thickness and complexity while maintaining effective image rendering and touch detection.
Implementation Method 1
The organic EL device is a device utilizing a phenomenon that when an electric field is applied across an organic thin film, the organic thin film emits a light
Implementation Method 2
a liquid crystal layer 18 is provided between the counter electrode 16 and the alignment film 17b
Data Source
AI summary
A display device includes a pixel portion including a plurality of pixels; a display switching function portion that displays an image based on light emitted from the pixel portion, and is capable of switching a three-dimensional display and a two-dimensional display of the image; and a sensor portion that detects whether or not an object comes into contact with or approaches.