To provide a light source device capable of suppressing fluctuation of light output based on temperature change without impairing the utilization efficiency of a laser light and an image display device using the same.SOLUTION: A light source device 100 includes a laser light source 101a that emits laser light having a wavelength included in the range of 635 nm to 645 nm, a temperature sensor 111 for detecting the temperature in the vicinity of the installation position of the laser light source 101a, and a laser control circuit 202 for controlling the laser light source 101a. The laser control circuit 202 approximates the change in a threshold current of the laser light source 101a with respect to the temperature by a quartic equation and approximates the change in a slope efficiency of the laser light source 101a with respect to the temperature by a quadratic equation to obtain a threshold current and a slope efficiency of the laser light source 101a corresponding to the temperature detected by the temperature sensor 111 and controls the laser light source 101a on the basis of the acquired threshold current and the slope efficiency.SELECTED DRAWING: Figure 2

    【課題】レーザ光の利用効率を損なうことなく、温度変化に基づく光出力の変動を抑制することが可能な光源装置およびそれを用いた画像表示装置を提供する。【解決手段】光源装置100は、635nm以上645nm以下の範囲に含まれる波長のレーザ光を出射するレーザ光源101aと、レーザ光源101aの設置位置付近の温度を検出するための温度センサ111と、レーザ光源101aを制御するレーザ制御回路202と、を備える。レーザ制御回路202は、温度に対するレーザ光源101aの閾値電流の変化を4次式で近似し、温度に対するレーザ光源101aのスロープ効率の変化を2次式で近似して、温度センサ111の検出温度に対応するレーザ光源101aの閾値電流およびスロープ効率を取得し、取得した閾値電流およびスロープ効率に基づいて、レーザ光源101aを制御する。【選択図】図2


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    Title :

    LIGHT SOURCE DEVICE AND IMAGE DISPLAY DEVICE


    Additional title:

    光源装置および画像表示装置


    Contributors:

    Publication date :

    2019-02-07


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    H01S Vorrichtungen, die stimulierte Emission verwenden , DEVICES USING STIMULATED EMISSION / 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 / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen



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