Title:
LIGHT-EMITTING ELEMENT DRIVING CIRCUIT AND LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/100526
Kind Code:
A1
Abstract:
A light-emitting element driving circuit (2) according to the present disclosure is provided with a constant current circuit (10), a switch (20), and a boost circuit (30). The constant current circuit (10) supplies a constant current (Ia) from a power supply voltage (Vcc) to a light-emitting element (3). The switch (20) causes a current (I1) to intermittently flow to the light-emitting element (3) on the basis of an external signal. The booster circuit (30) boosts the voltage between the power supply voltage (Vcc) and the light-emitting element (3) in synchronization with the lighting timing of the light-emitting element (3).
Inventors:
KUROKI SHOUICHI (JP)
Application Number:
PCT/JP2020/041781
Publication Date:
May 27, 2021
Filing Date:
November 09, 2020
Export Citation:
Assignee:
SONY SEMICONDUCTOR SOLUTIONS CORP (JP)
International Classes:
H01L33/00; H01S5/062; H05B45/00
Foreign References:
| JP2009231644A | 2009-10-08 | |||
| JP2012151057A | 2012-08-09 | |||
| JP2012204301A | 2012-10-22 | |||
| JP2011108799A | 2011-06-02 |
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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