3D Display Device Reducing Crosstalk via Temporal Sub-Frame Sequencing
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Solution Overview
Problem
3-dimensional image display devices using the temporal division color display method often experience crosstalk between adjacent left-eye and right-eye image data, which affects the stereoscopic effect and depth perception.
Innovation Solution
A 3-dimensional image display device with a display panel, a light source unit comprising a first and second color light source, and a data driver that applies specific voltage sequences to pixels to prevent crosstalk by using black or gray data voltages between left-eye and right-eye image data applications, ensuring that each eye only sees its respective image without overlap.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If temporal division color display method is used to display 3-dimensional images, then color display capability is improved, but crosstalk between left-eye and right-eye images is generated
Solution Approach 1:
The display period is divided into multiple sub-frames, with each sub-frame dedicated to displaying image data for a specific eye (left-eye or right-eye). By segmenting the temporal display sequence, the patent ensures that only one eye's image is displayed at a time, preventing crosstalk while maintaining color display capability through sequential color rendering in each sub-frame.
Solution Approach 2:
The patent employs periodic alternating display of left-eye and right-eye images through multiple sub-frames. The display sequence periodically switches between left-eye image data and right-eye image data, with each eye's image displayed in its dedicated sub-frame period. This periodic action prevents overlap and crosstalk between the two eyes' images while enabling full-color display through temporal color division.
2Object-generated harmful factors
If shutter glasses are used to prevent crosstalk, then image separation is improved, but device complexity and cost increase
Solution Approach 1:
The display device itself generates and controls the timing sequences to prevent crosstalk, eliminating the need for external shutter glasses. The data driver automatically controls the light source unit to display left-eye and right-eye images in separate sub-frames, making the system self-sufficient. This self-service approach prevents crosstalk while avoiding the added complexity and cost of external shutter glasses.
Solution Approach 2:
The patent introduces a light source unit as an intermediary component that can be precisely controlled to display different colors in different sub-frames. By controlling the light source timing and color output, the system creates a mediator mechanism that prevents crosstalk between left-eye and right-eye images without requiring external occlusion devices like shutter glasses.
3Object-generated harmful factors
If black data voltage is applied between left-eye and right-eye images, then crosstalk is reduced, but display time is reduced
Solution Approach 1:
Instead of using black data voltage to prevent crosstalk, the patent employs periodic action by dividing the display time into multiple sub-frames. Each sub-frame is dedicated to displaying image data for one eye, with the light source unit controlling color output in each sub-frame. This periodic sub-frame approach eliminates the need for black data voltage gaps, maintaining full display time while preventing crosstalk through temporal separation.
Data Source
AI summary
A 3-dimensional image display device according to an exemplary embodiment includes: a display panel including a plurality of pixels; a light source unit including a first color light source for supplying a first color light and a second color light source for supplying a second color light to the display panel; and a data driver sequentially applying a first left-eye data voltage, a second left-eye data voltage, a first gray data voltage, a first right-eye data voltage, and a second right-eye data voltage to a pixel, wherein the light source unit supplies the first color light when the first left-eye data voltage and the second right-eye data voltage are applied, the second color light when the second left-eye data voltage and the first right-eye data voltage are applied, and the light source supplies the second color light at a first intensity when the first gray data voltage is applied.