Title:
発光素子駆動装置、面状照明装置および液晶表示装置
Document Type and Number:
Japanese Patent JP4644315
Kind Code:
B2
Abstract:
A light emitting element drive apparatus that drives light emitting elements reduces power loss caused by variability between forward voltage drops of the light emitting elements. A plurality of voltage applying sections (1, 32 and 33; and 2, 34 and 35) generate application voltages based on a detection voltage determined based on a maximum forward voltage drop among the forward voltage drops of the light emitting element arrays (11 to 14), and apply the generated application voltages to the light emitting elements (11 to 14). Switching sections (30 and 31) switch between a plurality of voltage applying sections (1, 32 and 33; and 2, 34 and 35) to which the light emitting element arrays (11 to 14) individually connect. Controlling sections (40 to 42) control the switching sections (30 and 31) to switch connection to minimize the difference between forward voltage drops of light emitting element arrays (11 to 14).
Inventors:
Takeshi Takada
Hideyuki Nakanishi
Toshiki Onishi
Akihiro Yamamura
Takahiro Kobayashi
Hideyuki Nakanishi
Toshiki Onishi
Akihiro Yamamura
Takahiro Kobayashi
Application Number:
JP2010516721A
Publication Date:
March 02, 2011
Filing Date:
March 11, 2010
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H01L33/00; G02F1/133; G02F1/13357
Domestic Patent References:
| JP2008134288A | 2008-06-12 | |||
| JP2008305978A | 2008-12-18 | |||
| JP2006187187A | 2006-07-13 |
Foreign References:
| WO2006059437A1 | 2006-06-08 |
Attorney, Agent or Firm:
Koichi Washida