Display control circuit, display control method, and liquid crystal display device

• Main Author: KAWAGUCHI SEIJI
• Format: Patent
• Language: English
• Published: 16.03.2006
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

A display control circuit includes a vertical timing control circuit that generates first and second start signals, a panel driving unit that sequentially drives a plurality of OCB liquid crystal pixels in units of one row under the control of the first start signal to hold pixel voltages for gradation display in the pixels PX of the driven row, and that sequentially drives the pixels in units of at least one row under the control of the second start signal to hold pixel voltages for black insertion in the pixels of the driven row, and a light source driving unit that drives a plurality of backlight sources arranged substantially in parallel to the rows of pixels. In particular, the light source driving unit is configured to start, in synchronism with the first start signal, an operation for sequentially blinking the backlight sources with a predetermined duty ratio. The predetermined duty ratio is determined in accordance with a dimmer signal from outside such that the predetermined duty ratio, at a maximum value thereof, is not greater than a ratio of a holding period of the pixel voltage for gradation display to a sum of the holding period of the pixel voltage for gradation display and a holding period of the pixel voltage for black insertion.