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    • 7. 发明申请
    • WAVELENGTH CONVERSION DEVICE AND IMAGE DISPLAY APPARATUS USING SAME
    • 波长转换装置和图像显示装置
    • US20120044280A1
    • 2012-02-23
    • US13266956
    • 2011-03-01
    • Kenji NakayamaTetsuro MizushimaTatsuo ItohHiroyuki Furuya
    • Kenji NakayamaTetsuro MizushimaTatsuo ItohHiroyuki Furuya
    • G09G5/10G09G5/00G02F1/35
    • H01S3/109G03B21/20G03B21/2033H01S3/0621H01S3/0627H01S3/08072H01S3/094076H01S3/1312H04N9/3111H04N9/3161
    • A wavelength conversion device includes an excitation light source (11) that generates excitation light, a laser medium (12) that generates fundamental light by means of the excitation light, two resonator mirrors (13) that are disposed with the laser medium (12) being interposed therebetween and resonate the fundamental light, a wavelength conversion element (14) that is disposed between the two resonator mirrors (13) and wavelength-converts the fundamental light to harmonic light, and a drive unit (15) that generates a pulse modulation signal to pulse-drive the excitation light source (11). The laser medium (12) is formed of a material having a thermo-optical effect and a positive thermo-optical constant. The pulse modulation signal generated by the drive unit (15) has an initial interval (P1) including a rising edge of a pulse and a remaining interval (P2) subsequent to the initial interval. An average signal intensity during the initial interval (P1) is higher than an average signal intensity during the remaining interval (P2).
    • 波长转换装置包括产生激发光的激发光源(11),通过激发光产生基本光的激光介质(12),与激光介质(12)一起设置的两个谐振器反射镜(13) 插入在它们之间并共振基本光;布置在两个谐振镜之间的波长转换元件(14),并将基波波长转换成谐波光;以及驱动单元(15),其产生脉冲调制 信号脉冲驱动激发光源(11)。 激光介质(12)由具有热光效应和正热稳定性的材料形成。 由驱动单元(15)产生的脉冲调制信号具有包括脉冲上升沿和初始间隔之后的剩余间隔(P2)的初始间隔(P1)。 初始间隔(P1)期间的平均信号强度高于剩余间隔(P2)期间的平均信号强度。