Liquid Crystal Display Driving Control Circuit for Moving Image Clarity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional liquid crystal display devices experience issues with moving-image blurring, screen burn-in, flickering, and luminance variation due to increased operational frequency and voltage polarity inversion, which complicates hardware configurations and user experience.
Innovation Solution
Implementing a field dividing driving operation where odd and even fields are alternately driven with sub-fields for display and dark data writing, and inverting voltage polarity in each field to reduce operational frequency and stabilize data holding time, thereby offsetting frequency increases and improving image clarity and luminance consistency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If black insertion driving is performed to reduce trail-leaving, then moving image clarity is improved, but operational frequency doubles causing hardware complexity increase
Solution Approach 1:
The patent segments the driving process into first sub-field (display data writing) and second sub-field (black data writing) for each field period. This segmentation allows the liquid crystal to be driven at original frequency while still achieving black insertion effect, avoiding frequency doubling and hardware complexity increase.
2Stability of the object's composition
If frame frequency is increased to reduce flickering, then image stability is improved, but operational frequency doubles causing trail-leaving
Solution Approach 1:
The patent divides each field into first sub-field for display data and second sub-field for black data, enabling stable image display at original frame frequency while preventing trail-leaving through the black insertion effect without requiring frequency doubling.
3Reliability
If voltage polarity is inverted every line to prevent burn-in, then display durability is improved, but operational frequency increases causing hardware complexity
Solution Approach 1:
The patent segments the driving process into odd fields and even fields with different polarity inversion patterns. By controlling polarity inversion only in specific fields rather than every line, the patent achieves burn-in prevention while avoiding excessive frequency increase and hardware complexity.
4Stability of the object's composition
If holding time for display data is extended to improve image quality, then luminance consistency is improved, but operational frequency decreases causing flickering
Solution Approach 1:
The patent segments the field period into first sub-field for display data writing and second sub-field for black data writing. This allows extended holding time for display data to ensure luminance consistency while maintaining original operational frequency through proper timing control of the segmented fields.
Data Source
AI summary
A liquid crystal display device is provided which is capable of improving quality of moving images. A field dividing driving operation is performed in which an odd field during which each of scanning electrodes in odd-numbered rows is sequentially driven and an even field during which each of scanning electrodes in even-numbered rows is sequentially driven occur, alternately and repeatedly, with time width of a refresh rate. In the former half of the odd field, display data is written in each of pixel regions corresponding to scanning electrodes in odd-numbered rows and, in the latter half of the odd field, black data is written in each of the pixel regions corresponding to scanning electrodes in the odd-numbered rows. In the former half of the even field, display data is written in each of pixel regions corresponding to scanning electrodes in the even-numbered rows and, in the latter half of the even field, black data is written in each of pixel regions corresponding to scanning electrodes in the even-numbered rows.