3D Display Grating Integration via Sub-Pixel Electrodes
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Solution Overview
Problem
The production costs of 3D display devices are increased due to the need for additional processes or new equipment in manufacturing the grating layer, either because a parallax barrier requires an additional layer in cell-assembling or the arch-height of the lens-grating needs to be elevated.
Innovation Solution
The thickness of the grating layer is reduced by manufacturing the parallax barrier within the display's single viewing-field pixel-electrode, allowing it to be integrated directly within the display device, or by reducing the arch-height of the lens-grating, thus avoiding the need for new processes or equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a parallax barrier is added as an additional layer on the display device after cell-assembling, then the 3D display function is achieved, but the production cost increases due to requiring new processes or equipment
Solution Approach 1:
The patent merges the parallax barrier function with the existing pixel electrode structure by dividing each pixel electrode into multiple sub-pixel electrodes (first, second, third, fourth sub-pixel electrodes) that serve both as electrode structures and as the grating layer for 3D display. This integration eliminates the need for a separate parallax barrier layer and its associated manufacturing processes.
Solution Approach 2:
The sub-pixel electrodes perform multiple functions: they serve as the electrode structure for liquid crystal control and simultaneously form the grating layer that directs light to left and right eyes. This multi-functionality eliminates the need for dedicated 3D display components, reducing manufacturing complexity and cost.
2Adaptability or versatility
If the arch-height of the lens-grating is increased to achieve proper 3D display, then the 3D display function is improved, but the manufacturing difficulty increases due to existing patterning process limitations
Solution Approach 1:
The patent replaces the mechanical lens-grating system with an electromagnetic/optical approach using sub-pixel electrodes and liquid crystal modulation. Instead of relying on physical lens arch-height, the system uses electrically controlled light modulation to achieve 3D display, avoiding the manufacturing precision challenges of high arch-height lenses.
3Measurement precision
If the parallax barrier is placed at a distance of 0.3mm from the light-emitting point, then the 3D display quality is optimized, but the device complexity increases due to requiring additional spacer layers
Solution Approach 1:
The patent combines the parallax barrier function with the pixel electrode structure, eliminating the need for separate spacer layers to maintain the 0.3mm distance. The sub-pixel electrodes are formed as part of the existing electrode structure, integrating the grating function into the device's inherent architecture.
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 approach enables the production of 3D display devices using existing manufacturing processes, reducing production costs by eliminating the need for additional processes or equipment.
Implementation Method 1
a liquid crystal layer between the lower substrate and the upper substrate
Implementation Method 2
the first polarizing plate and the second polarizing plate are arranged in a cross Nicols manner
Implementation Method 3
a compensation film, and a second polarizing plate in this sequence from the lower substrate to the upper substrate, wherein the compensation film is between the color filter and the second polarizing plate
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Embodiments of the present invention provide and display device and a manufacturing method thereof, which can reduce production costs. The display device comprises a grating layer and an array substrate; the array substrate comprises a plurality of pixel-units, each pixel-unit comprising a pixel-electrode and a control-circuit; the pixel-electrode of each pixel-unit comprises mutually-spaced at least two left-viewing-field pixel-electrodes and at least two right-viewing-field pixel-electrodes; the control-circuit of each pixel-unit comprises a first sub-control-circuit connected with the left-viewing-field pixel-electrodes and a second sub-control-circuit connected with the right-viewing-field pixel-electrodes.