Title:
輝度制御装置およびモニタ装置
Document Type and Number:
Japanese Patent JP3610958
Kind Code:
B2
Abstract:
Disclosed is a brightness control device which can reduce lateral stripes on the display screen of a display device that are caused by brightness control. The brightness control device (3) controls the brightness of the display screen (2a) in a display device (2) by controlling the duty ratio of a PWM signal outputted to an inverter type lighting device (4). The frequency of the PWM signal is set in response to the vertical synchronization frequency of an image signal inputted to the display device (2). This allows avoiding the situation that the frequency of the brightness control signal becomes an integral multiple of the vertical synchronization frequency of the image signal.
Inventors:
Yoshimura
Application Number:
JP2002059581A
Publication Date:
January 19, 2005
Filing Date:
March 05, 2002
Export Citation:
Assignee:
Seiko Epson Corporation
International Classes:
G02F1/133; G09G3/20; G09G3/34; G09G3/36; H04N5/66; H05B41/392; (IPC1-7): G09G3/36; G02F1/133; G09G3/20; G09G3/34
Domestic Patent References:
| JP7325286A | ||||
| JP3018816A |
Attorney, Agent or Firm:
Masahiko Ueyanagi
Fujitsuna Hideyoshi
Osamu Suzawa
Fujitsuna Hideyoshi
Osamu Suzawa