Touch Grating Cell Multiplex Electrodes Integration
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Solution Overview
Problem
Conventional stereoscopic display devices with liquid crystal grating cells require a separate touch screen layer, increasing manufacturing complexity, cost, and device thickness due to independent fabrication processes for touch and display functions.
Innovation Solution
A touch grating cell with multiplex electrodes on opposing substrates, functioning as both touch driving and sensing electrodes in one configuration and as common and grating electrodes in another, integrated into the display device to enable both touch and stereoscopic display functions without additional layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch screen layer is added on the outer surface of the display screen, then touch function is realized, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the touch screen functionality with the liquid crystal grating cell by integrating touch electrodes directly into the grating cell structure. The first and second transparent electrode structures with multiplex electrodes serve dual purposes: forming the grating pattern for stereoscopic display and providing touch sensing capabilities, thereby eliminating the need for a separate touch screen layer and reducing fabrication complexity
Solution Approach 2:
The transparent electrode structures in the liquid crystal grating cell are designed to perform multiple functions simultaneously. The multiplex electrodes function as both the grating pattern elements for 3D display and as touch sensing electrodes, allowing the same structural elements to serve dual purposes across different operational modes (touch mode and display mode)
2Adaptability or versatility
If a separate touch screen layer is added on the outer surface of the display screen, then touch function is realized, but production cost increases
Solution Approach 1:
The patent combines the touch screen and liquid crystal grating cell into a single integrated device structure. By fabricating the touch electrodes and grating electrodes using the same fabrication process on the same substrates, the patent eliminates the need for separate manufacturing and assembly processes, thereby reducing production cost
Solution Approach 2:
The electrode structures are designed to serve multiple functions, allowing the same physical components to provide both touch sensing and stereoscopic display capabilities. This multi-functionality reduces the total number of components and processes required, leading to lower fabrication costs
3Adaptability or versatility
If a separate touch screen layer is added on the outer surface of the display screen, then touch function is realized, but overall thickness of the display device increases
Solution Approach 1:
The patent integrates the touch functionality within the existing thickness envelope of the liquid crystal grating cell by placing touch electrodes on the same substrates that form the grating structure. This merging of functions eliminates the need for an additional external touch screen layer, thereby maintaining a compact overall 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
Simplifies manufacturing, reduces production costs, and integrates touch and stereoscopic display functions into a single device structure, reducing overall thickness while maintaining effective performance.
Implementation Method 1
a liquid crystal layer, arranged between the first substrate and the second substrate
Implementation Method 2
the liquid crystal grating cell may switch between 2D and 3D modes
Implementation Method 3
a first transparent electrode structure, arranged on the first substrate; and a second transparent electrode structure, arranged on the second substrate
Data Source
AI summary
A touch grating cell and a touch stereoscopic display device are provided. The touch grating cell comprises: a first substrate (10) and a second substrate (20) arranged opposite to each other; a liquid crystal layer (30) arranged between the first substrate (10) and the second substrate (20); a first transparent electrode structure (40), arranged on the first substrate (10); and a second transparent electrode structure (50), arranged on the second substrate (20), wherein each of the first transparent electrode structure (40) and the second transparent electrode structure (50) includes a plurality of multiplex electrodes (41, 51); in a touch period, the multiplex electrode (41) in the first transparent electrode structure (40) and the multiplex electrode (51) in the second transparent electrode structure (50) are used as a touch driving electrode and a touch sensing electrode, respectively, and are perpendicular to each other in extending directions; and in a display period, the multiplex electrode (41) in the first transparent electrode structure (40) and the multiplex electrode (51) in the second transparent electrode structure (50) are used as a common electrode and a grating electrode, respectively. Because a touch function is integrated in the grating cell, the grating electrode and the common electrode are shared with the touch driving electrode and the touch sensing electrode, respectively, so that a production process is reduced, cost is saved, and a purpose of thinning is achieved.