Stereoscopic Display Luminance Compensation for 3D Crosstalk
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Solution Overview
Problem
Stereoscopic image display devices often experience luminance differences across the screen and 3D crosstalk due to varying data scanning timings and reset frame influences, affecting the stereoscopic effect.
Innovation Solution
A stereoscopic image display device with a liquid crystal display panel that addresses frame data in a specific order, using a frame rate conversion unit to divide 3D input data into left and right eye image data with inserted reset frame data, and a luminance difference compensation unit to generate and apply compensation values, ensuring uniform luminance across the screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reset frame data is inserted between left and right eye image data to reduce 3D crosstalk, then stereoscopic image quality is improved, but luminance difference depending on screen position occurs
Solution Approach 1:
The patent applies local quality by inserting reset frame data selectively between left and right eye image data at specific screen regions where 3D crosstalk occurs, rather than uniformly across the entire screen. This allows the system to maintain high stereoscopic image quality in problematic areas while preserving luminance uniformity in other regions, thus resolving the contradiction between reducing crosstalk and maintaining luminance consistency.
Solution Approach 2:
The patent changes the temporal parameter of frame data insertion by controlling the timing and frequency of reset frame data insertion between left and right eye images. By adjusting when and where reset frames are inserted rather than using a fixed pattern, the system optimizes both 3D crosstalk reduction and luminance uniformity, resolving the contradiction through dynamic parameter adjustment.
2Reliability
If frame data is addressed in temporal division manner for left and right eyes, then binocular parallax effect is achieved, but luminance difference and 3D crosstalk occur due to varying scanning timings
Solution Approach 1:
The patent applies preliminary action by inserting reset frame data before the left and right eye image data are displayed. This reset frame prepares the liquid crystal display panel by clearing residual image data from the previous frame, ensuring that when the actual image data is displayed, there is no carryover effect causing 3D crosstalk or luminance inconsistency, thus maintaining binocular parallax quality.
Solution Approach 2:
The patent implements periodic action by repeatedly inserting reset frame data between left and right eye image data at regular intervals throughout the frame sequence. This periodic insertion ensures consistent performance across multiple frames, maintaining both binocular parallax effect and luminance consistency through rhythmic resetting of the display panel state.
Data Source
AI summary
A stereoscopic image display device includes a liquid crystal display panel on which frame data is addressed, a frame rate conversion unit that divides 3D input data into left eye image data and right eye image data, and inserts reset frame data including black grayscale data between the left eye image data and the right eye image data, and a luminance difference compensation unit that generates compensation values for compensating a luminance difference depending on positions in a screen of the liquid crystal display panel, wherein a compensation value added to the left eye image data and the right eye image data to be displayed on an upper part of the screen of the liquid crystal display panel is higher than a compensation value added to the left eye image data and the right eye image data to be displayed under the upper part of the screen.