Touch Panel 3D Display Thickness Reduction via Polarization Switching
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Solution Overview
Problem
The integration of a parallax barrier or lenticular lens in touch panel devices increases the thickness of the device, making it unsuitable for medium and small-sized devices that require reduced thickness and power consumption.
Innovation Solution
A display apparatus with a touch panel that includes a polarizing switch panel and a parallax realization layer, where the parallax realization layer is strategically embedded within the touch panel's glass or tempered glass layers, allowing for the adjustment of its thickness using optical design parameters to minimize overall device thickness while maintaining the 3D image rendering capability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a parallax barrier or lenticular lens is provided between the display panel and touch panel to enable 3D display without glasses, then the 3D image display capability is improved, but the device thickness increases by as much as the thickness of the optical layer
Solution Approach 1:
The patent combines the optical layer containing the parallax barrier with the touch panel into a single integrated structure. The touch panel serves dual functions: as a touch sensing interface and as the housing for the optical elements needed for 3D display. This merging eliminates the need for a separate optical layer, thereby reducing overall device thickness while maintaining 3D display capability.
Solution Approach 2:
The touch panel is designed to perform multiple functions simultaneously: it acts as both the touch sensing panel and the structural housing for the optical elements (parallax barrier). By making the touch panel universal, the patent eliminates redundant components and reduces the number of layers needed, thereby decreasing device thickness without sacrificing 3D display functionality.
2Adaptability or versatility
If an optical layer including a lenticular lens is interposed between the LCD and the touch panel to provide binocular disparity images, then the autostereoscopic 3D effect is achieved, but the entire device thickness is increased
Solution Approach 1:
The patent merges the optical layer with the touch panel structure, so that the parallax barrier and other optical elements are integrated within the touch panel's glass layers rather than being placed in a separate optical layer. This integration maintains the autostereoscopic 3D effect while eliminating the additional thickness that would result from a separate optical layer.
Solution Approach 2:
The optical elements (parallax barrier) are nested within the existing touch panel structure, specifically embedded in the glass layers of the touch panel. This nesting approach allows the optical components to be housed within the space already allocated for the touch panel, rather than adding external layers, thereby maintaining compact device thickness.
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 a thinner display apparatus with a touch panel that effectively provides a 3D effect without increasing the device's thickness, thus addressing the thickness and power requirements for medium and small-sized devices.
Implementation Method 1
a polarizing switch panel configured to switch a direction of polarization of light emitted from the display panel
Implementation Method 2
a parallax realization layer which is formed on one side of the polarizing switch panel and is configured to provide a binocular disparity image by using light emitted from the polarizing switch panel
Data Source
AI summary
A display apparatus includes a display panel configured to display an image frame that includes a right-eye image and a left-eye image, and a touch panel configured to sense a user touch, wherein the touch panel includes a polarizing switch panel configured to switch a direction of polarization of light emitted from the display panel, and a parallax realization layer which is formed on one side of the polarizing switch panel and is configured to provide a binocular disparity image by using light emitted from the polarizing switch panel.