LIGHT SOURCE DRIVING DEVICE AND HEAD-UP DISPLAY DEVICE

WIPO Patent Application WO/2018/101121

A1

Provided are a light source driving device and a head-up display device that can secure greater light stability. A light source driving device (5) drives a light source (11g) that emits green light (G) and a light source (11r) that emits red light (R). The light source driving device (5) comprises: a first voltage adjusting unit (310) that adjusts a voltage (Vg) applied to the light source (11g) on the basis of a power supply voltage from a battery (700); a second voltage adjusting unit (320) that generates a voltage (Vr) to be applied to the light source (11r) by using the voltage (Vg) as a power supply; and a first control unit (100) that performs voltage variable light-modulation processing. In the voltage variable light-modulation processing, the voltage (Vg) and the voltage (Vr) are set such that a light intensity ratio between the green light (G) and the red light (R) is equal to a desired light intensity ratio and the set voltage (Vg) and voltage (Vr) are respectively applied to the light source (11g) and the light source (11r) via the first voltage adjusting unit (310) and the second voltage adjusting unit (320).

KURAISHI TOMOYA
HADA MAKOTO
KAWATE TAMITO

PCT/JP2017/041781

June 07, 2018

November 21, 2017

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NIPPON SEIKI CO LTD (JP)

G02B27/01; H05B37/02; G03B21/00; G03B21/14; G09F9/00; G09G3/20; G09G3/34

JP2011165400A	2011-08-25
JP2010503169A	2010-01-28
JP2005267999A	2005-09-29
JP2014041315A	2014-03-06
JP2016115497A	2016-06-23
JP2007189004A	2007-07-26
JP2012104453A	2012-05-31

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