OLED Grating 3D Display Reducing Crosstalk
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Solution Overview
Problem
Current naked eye-type 3D display devices suffer from high crosstalk due to low contrast between bright and dark grating units in liquid crystal gratings, resulting from insufficient deflection of liquid crystal molecules.
Innovation Solution
A 3D display device utilizing a grating with OLED light-emitting devices on a substrate, where OLED light-emitting devices form bright grating units and non-emitting areas form dark grating units, enhancing contrast and reducing crosstalk by achieving higher brightness and nearly zero brightness in dark cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If liquid crystal molecules are used to form dark grating cells by deflection, then the structure can achieve a complete dark state, but the deflection is insufficient resulting in residual brightness and low contrast
Solution Approach 1:
The patent extracts the light emission function from the grating structure itself, using OLED light emitting devices to actively generate light for bright grating cells, while dark grating cells simply remain non-emissive. This separates the light generation mechanism from the liquid crystal deflection mechanism, allowing dark cells to achieve near-zero brightness without relying on imperfect molecular deflection.
Solution Approach 2:
The patent changes the fundamental parameter of light emission from passive (blocking light with liquid crystals) to active (OLED devices emitting or not emitting light). By controlling the emission state of OLED devices rather than relying on liquid crystal deflection, the system achieves superior contrast with bright cells at high brightness and dark cells at near-zero brightness.
2Device complexity
If liquid crystal gratings are used to form bright and dark grating units, then the device structure is relatively simple, but the contrast between bright and dark units is low resulting in high crosstalk
Solution Approach 1:
The patent segments the grating into independently controllable OLED light emitting devices arranged in specific patterns. Each OLED device or group of devices can be independently controlled to emit or not emit light, creating precisely defined bright and dark grating cells. This segmentation allows for superior control over light distribution and contrast compared to continuous liquid crystal layers.
3Illumination intensity
If OLED light emitting devices are used to form bright grating units, then the brightness is significantly improved, but the device complexity increases compared to liquid crystal gratings
Solution Approach 1:
The OLED light emitting devices serve multiple functions: they act as both the light source for bright grating cells and as the active matrix for controlling the grating pattern itself. This multi-functionality eliminates the need for separate backlight units and liquid crystal modulation layers, actually simplifying the overall device architecture while achieving superior brightness and contrast.
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 significantly improves contrast between bright and dark grating units, thereby reducing crosstalk and enhancing the immersive 3D display experience.
Implementation Method 1
OLED light emitting devices provided on the substrate, in which at least a part of the plurality of OLED light emitting devices emit light when an operating voltage is applied thereto
Data Source
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AI summary
The present invention provides a 3D display device and a driving method thereof, and relates to a display technology field for solving a problem that a 3D picture crosstalk is large due to a low contrast between a bright grating unit and a dark grating unit in the grating. Wherein the 3D display device comprises a grating and a display panel, the grating is divided into a bright grating cell and a dark grating cell, the grating comprising a substrate and a plurality of OLED light-emitting devices arranged on the substrate, At least a part of the plurality of OLED light emitting devices emit light to apply the operating voltage to form the bright grating cells, and the non-light emitting OLED light-emitting devices form the dark grating cells. The 3D display device is for displaying a 3D picture.