3D Display Lens Layer Voltage Switching for Touch Noise Control
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Solution Overview
Problem
Existing display devices struggle to switch between 3D and 2D modes efficiently while maintaining thin thickness and reducing production costs, and they experience interference of noise with touch driving signals in 3D mode.
Innovation Solution
A display device with a specific voltage and signal application framework, including a display panel, electrode layers, and lens layer, that allows switching between 3D and 2D modes by varying voltage levels and signal patterns to minimize noise interference and reduce production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a display device uses a conventional structure for switching between 3D and 2D modes, then it can achieve mode switching capability, but the thickness and production cost increase
Solution Approach 1:
The lens layer is designed to serve multiple functions: it acts as both a 3D display component (through optical lensing) and a touch sensor component (through capacitance sensing). By integrating touch sensor electrodes into the lens layer structure, the patent eliminates the need for separate touch sensor layers, thereby reducing overall device thickness while maintaining both 3D and touch functionality
Solution Approach 2:
The patent combines the lens layer and touch sensor layer into a single integrated structure. The lens layer includes transparent insulating layers and conductive layers that simultaneously form optical lenses and capacitance-based touch sensors. This merging of functions allows mode switching capability to be achieved without adding extra thickness from separate layers
2Adaptability or versatility
If a display device uses a conventional structure for switching between 3D and 2D modes, then it can achieve mode switching capability, but production cost increases
Solution Approach 1:
The lens layer materials (transparent insulating layers and conductive layers) are selected to be compatible with existing liquid crystal display manufacturing processes. The same layers that form optical lenses also serve as touch sensor electrodes, eliminating the need for additional manufacturing steps and materials, thereby reducing production cost while enabling mode switching
Solution Approach 2:
The patent utilizes changes in electrical parameters (voltage levels applied to the first electrode layer) to switch between 3D and 2D modes. By controlling the voltage applied to the lens layer, the optical properties change to enable mode switching without requiring physical reconfiguration or additional components, simplifying manufacturing
3Adaptability or versatility
If a display device operates in 3D mode with conventional voltage signaling, then it can display stereoscopic images, but noise interferes with touch driving signals
Solution Approach 1:
The patent employs periodic modulation of voltage levels applied to the lens layer at different frame periods. During first frame periods, a first voltage level is applied for 3D display, while during second frame periods, a second voltage level is applied for touch sensing. This periodic separation of functions in time domain allows both 3D display and touch sensing to operate without mutual interference
Solution Approach 2:
The patent dynamically adjusts the voltage level applied to the first electrode layer based on the operational mode (3D or touch sensing). By making the voltage level variable and mode-dependent, the system can optimize performance for each function and minimize noise interference between the two modes
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 efficient switching between 3D and 2D modes with reduced thickness and production costs, while minimizing noise interference from touch driving signals.
Implementation Method 1
first sensors and second sensors forming a capacitance with the first sensors
Implementation Method 2
a liquid crystal layer disposed on the first electrode layer
Data Source
AI summary
A display device includes a display panel, a first electrode layer on the display panel, a liquid crystal layer on the first electrode layer, a second electrode layer on the liquid crystal layer, and a lens layer on the second electrode layer. The second electrode layer includes first sensors and second sensors forming a capacitance with each other, a first period includes a first frame period and a second frame period, a first voltage level of a first voltage applied to the first electrode layer during the first frame period is less than a second voltage level applied to the first electrode layer during the second frame period, and a first average voltage level of driving signals applied to the first sensors during the first frame period is less than a second average voltage level of the driving signals during the second frame period.