Field Sequential 3D Display Backlight Driving Method
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Solution Overview
Problem
Field sequential driving methods for liquid crystal display devices require frequent switching of backlight lights, leading to increased power consumption and display issues when showing 3D images, as the backlight needs to be turned on and off repeatedly to avoid image signal writing problems.
Innovation Solution
A driving method for liquid crystal display devices that synchronizes the switching of images for the left and right eyes with a pair of glasses, using a backlight that emits light continuously during specific lighting periods for each color, reducing the need for frequent backlight switching and thus lowering power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the backlight is frequently switched on and off to avoid display problems during image signal writing, then display quality is improved, but power consumption increases
Solution Approach 1:
The patent applies preliminary action by completing the image signal writing to all pixels before turning on the backlight. The writing period precedes the lighting period, ensuring that all image data is fully written to the pixel electrodes before the backlight illuminates the display, thus preventing display defects while allowing the backlight to remain on continuously during viewing periods
Solution Approach 2:
The patent implements continuity of useful action by keeping the backlight on continuously during the lighting period without frequent on/off switching. The backlight remains active throughout the entire viewing period, eliminating the energy waste associated with repeated switching operations while maintaining display quality through the preliminary writing approach
2Reliability
If the backlight is turned off during image signal writing to prevent display defects, then display quality is improved, but the driver circuit complexity increases
Solution Approach 1:
The patent uses preliminary action to complete all image signal writing operations before initiating the backlight lighting period. This temporal separation allows the backlight to remain continuously on during viewing without causing display defects, thereby eliminating the need for complex driver circuit control that would be required to coordinate backlight switching with writing operations
3Adaptability or versatility
If field sequential driving is used to display 3D images, then stereoscopic display capability is improved, but power consumption increases due to frequent backlight switching
Solution Approach 1:
The patent applies preliminary action by completing the writing of image signals for both left and right eye images before turning on the backlight for display. This approach allows field sequential driving to maintain stereoscopic display capability while avoiding frequent backlight switching, as the backlight remains continuously on during the entire viewing period
Solution Approach 2:
The patent implements continuity of useful action by maintaining the backlight in a continuously on state during the lighting period for 3D display. This eliminates the need for frequent backlight switching that would otherwise be required to synchronize with left and right eye image display, thereby reducing power consumption while preserving stereoscopic display capability
Data Source
AI summary
It is an object to provide a specific driving method for reduction in power consumption in displaying a 3D image with field sequential driving. A driving method of a liquid crystal display device is a method in which a stereoscopic image can be perceived with a liquid crystal display device switching an image for a left eye and an image for a right eye to display the image for the left eye or the image for the right eye, and a pair of glasses having a switching circuitry with which the image for the right eye and the image for the left eye are switched in synchronization with display of the image for the left eye or the image for the right eye in order that the left or right eye of a viewer may selectively perceive the image for the left eye or the image for the right eye; the image for the left eye and the image for the right eye are perceived by the left eye or right eye in a mixed color by switching light which is emitted from a backlight portion and which corresponds to a plurality of colors, within a predetermined period, and the light which is emitted from the backlight portion are continuously emitted in accordance with an image signal of each of a plurality of colors which forms the linage for the left eye and the image for the right eye.