To provide a light source drive device and head-up display apparatus which suppress the change in the chromaticity from the desired chromaticity when changing the display luminance.SOLUTION: A light source drive device 5 includes: voltage adjustment units 310, 320 which adjust the voltage Vr, Vg applied to light sources 11g, 11r; a lighting control processing unit 101 which performs voltage variable lighting control processing of adjusting the light emission luminance of each of the light sources 11g, 11r to the requested luminance from the present luminance so that the light intensity ratio of the green light G and red light R becomes the desired light intensity ratio by adjusting the voltage Vg and voltage Vr through the voltage adjustment units 310, 320; and a predicted time determination unit 102 which determines the predicted time that is predicted to be required for adjusting the luminance to the requested luminance from the present luminance. The lighting control processing unit 101 adjusts the light emission luminance of the light sources 11g, 11r to the requested luminance from the present luminance with the luminance adjustment time equal to or longer than the longer predicted time out of the predicted time for the light source 11g and the predicted time for the light source 11r.SELECTED DRAWING: Figure 6
【課題】表示輝度を変化させる際に所望の色度から色度が変化することが抑制される光源駆動装置及びヘッドアップディスプレイ装置を提供する。【解決手段】光源駆動装置5は、光源11g,11rに印加する電圧Vr,Vgを調整する電圧調整部310,320と、電圧調整部310,320を通じて電圧Vg及び電圧Vrを調整することで、緑色光G及び赤色光Rの光強度比が所望の光強度比となるように、光源11g及び光源11rそれぞれの発光輝度を現在の輝度から要求輝度に調整する電圧可変調光処理を行う調光処理部101と、現在の輝度から要求輝度に輝度を調整するのに要することが予想される予想時間を判断する予想時間判断部102と、を備える。調光処理部101は、光源11gについての予想時間と光源11rについての予想時間とのうち長い予想時間以上の輝度調整時間をかけて光源11g,11rの発光輝度を現在の輝度から要求輝度に調整する。【選択図】図6
LIGHT SOURCE DRIVE DEVICE AND HEAD-UP DISPLAY APPARATUS
光源駆動装置及びヘッドアップディスプレイ装置
2018-12-20
Patent
Electronic Resource
Japanese
LIGHT SOURCE DEVICE, DISPLAY, AND HEAD-UP DISPLAY DEVICE
European Patent Office | 2017
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