Title:
LIGHT QUANTITY CONTROL DEVICE, CONTROL METHOD OF THE SAME AND DISPLAY DEVICE
Document Type and Number:
Japanese Patent JP2015019097
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To acquire a coefficient for compensate for an influence on a light quantity of a light-emitting element caused by a secular change in view of an influence caused by an ambient temperature of the light-emitting element.SOLUTION: A light quantity control device determines a drive value of a light-emitting element based on a detected light quantity and a target light quantity value of the light-emitting element to perform control of driving the light-emitting element. And the light quantity control device stores information for obtaining a drive value of the light-emitting element at the time of power activation of the light quantity control device based on the determination result of the drive value and a detected ambient temperature. At the time of activation, the light quantity control device determines the drive value of the light-emitting element based on the information for obtaining the drive value and the ambient temperature detected at the time of power activation of the light quantity control device.
Inventors:
TAKANASHI IKUO
Application Number:
JP2014181556A
Publication Date:
January 29, 2015
Filing Date:
September 05, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
H01L33/00; H05B37/02
Domestic Patent References:
| JP2004296841A | 2004-10-21 | |||
| JP2009117716A | 2009-05-28 | |||
| JPH05327450A | 1993-12-10 | |||
| JP2006351685A | 2006-12-28 | |||
| JP2007212946A | 2007-08-23 | |||
| JP2005208231A | 2005-08-04 | |||
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| JP2002369506A | 2002-12-20 | |||
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Attorney, Agent or Firm:
Yasunari Otsuka
Shiro Takayanagi
Yasuhiro Otsuka
Hideji Kimura
Shimoyama 治
Yukimitsu Nagagawa
Shiro Takayanagi
Yasuhiro Otsuka
Hideji Kimura
Shimoyama 治
Yukimitsu Nagagawa