Title:
表示装置および表示制御方法
Document Type and Number:
Japanese Patent JP6448283
Kind Code:
B2
Abstract:
A drive control circuit (200) of a backlight (220) includes a drive circuit (240) that drives the backlight (220), a voltage detection unit (250) that detects whether or not a supply voltage Vp from a battery (210) is less than or equal to a threshold value, and a controller (260) that controls the operation of the drive circuit (240). When the supply voltage Vp from the battery (210) is less than or equal to the threshold value, the drive circuit (240) changes a drive current to be supplied to the backlight (220) to a low current value. Furthermore, in response to a change in the drive current, the controller (260) provides, to the drive circuit (240), a PWM signal to extend a time period for which the backlight (220) are on.
Inventors:
Kazuhiro Kitamura
Hiroki Okada
Hiroki Okada
Application Number:
JP2014203561A
Publication Date:
January 09, 2019
Filing Date:
October 02, 2014
Export Citation:
Assignee:
Alpine Electronics Co., Ltd.
International Classes:
G09G3/36; G02F1/133; G09G3/20; G09G3/34; H05B37/02
Domestic Patent References:
| JP2010015728A | ||||
| JP1233899A | ||||
| JP58034439U | ||||
| JP61232723A | ||||
| JP2010134009A | ||||
| JP2012194404A | ||||
| JP2011248060A | ||||
| JP2012220889A |
Foreign References:
| WO2006123682A1 | ||||
| US20140009376 | ||||
| US20030001815 |
Attorney, Agent or Firm:
Kyozo Katayose
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