PROBLEM TO BE SOLVED: To allow a light intensity emitted from a light source to be accurately adjusted even in a field sequential color drive system for performing an on/off at high speed and to enable a dynamic range from high luminance to low luminance to be secured.SOLUTION: A light intensity detection signal SFB showing the intensity of light emitted by a light source is acquired. A comparison circuit 410 generates a comparison signal SB showing an ON/OFF on the basis of the light intensity detection signal SFB and a set reference signal SA. A logic circuit 420 repeats the ON/OFF based on a pulse signal inputted from the comparison circuit 410 within a sub-frame period, and outputs a lighting signal SD1 making the light source 11 emit according to the reference signal SA which is a set value and a non-lighting signal SD2 which does not make the light source 11 emit according to the set value.

    【課題】高速で点消灯を行うフィールドシーケンシャルカラー駆動方式においても、精度よく光源から出射される光強度を調整可能であり、高輝度から低輝度までのダイナミックレンジを確保することができる。【解決手段】光源11が発している光の強度を示す光強度検出信号SFBを取得し、比較回路410が、光強度検出信号SFBと設定された基準信号SAとに基づいてオンとオフとを示す比較信号SBを生成し、論理回路420は、サブフレーム期間内において、比較回路410から入力されるパルス信号に基づくオン/オフを繰り返し、設定値である基準信号SAに応じて光源11を発光させる点灯信号SD1と、設定値に応じて光源11を発光させない非点灯信号SD2と、を出力する。【選択図】図4


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    Title :

    LIGHT SOURCE DRIVE DEVICE AND DISPLAY DEVICE


    Additional title:

    光源駆動装置及び表示装置


    Contributors:

    Publication date :

    2015-07-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G09G Anordnungen oder Schaltungen zur Steuerung oder Regelung von Anzeigevorrichtungen mit statischen Mitteln zur Darstellung veränderlicher Informationen , ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS



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