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    • 52. 发明申请
    • LIQUID CRYSTAL DISPLAY APPARATUS
    • 液晶显示装置
    • US20100289986A1
    • 2010-11-18
    • US12811448
    • 2009-11-02
    • Shinichi ShikiiTakayuki NagataTatsuo ItohKazuhisa YamamotoShinichi Kadowaki
    • Shinichi ShikiiTakayuki NagataTatsuo ItohKazuhisa YamamotoShinichi Kadowaki
    • G02F1/13357G02F1/1335
    • G02B6/0038G02B6/0028G02B6/0036G02F1/133621
    • A wavelength selection substrate 23 is configured with a wavelength selection section 23R which transmits only red laser light and reflects other light components, a wavelength selection section 23G which transmits only a green laser light and reflects other light components, and a wavelength selection section 23B which transmits only a blue laser light and reflects other light components. Of laser light 12 outputted from a light guide plate 14, a laser light component that corresponds to a color passing through one of the wavelength selection sections passes through the wavelength selection substrate 23 and enters a liquid crystal panel 22, whereas a laser light component that does not correspond to the color is reflected from the wavelength selection substrate 23 and returns the light guide plate 14. The laser light having returned the light guide plate 14 is reflected from the reflection plate 21 and again enters the wavelength selection substrate 23. This reciprocation of the laser light is repeated until the laser light pass through the wavelength selection section. With this repetition of passing and reflection, the laser light 12 is separated into respective colors of red, green, and blue, and outputted from the wavelength selection substrate 23.
    • 波长选择基板23配置有仅透射红色激光并反射其他光分量的波长选择部23R,仅透射绿色激光并反射其他光分量的波长选择部23G,以及波长选择部23B,其中 仅透射蓝色激光并反射其他光分量。 从导光板14输出的激光12中,对应于通过波长选择部中的一个的颜色的激光成分通过波长选择基板23而进入液晶面板22,而激光成分 不对应于从波长选择基板23反射的颜色并返回导光板14.返回导光板14的激光从反射板21反射并再次进入波长选择基板23.该往复运动 重复激光直到激光通过波长选择部分。 通过这种重复的通过和反射,激光12被分离成红色,绿色和蓝色的各种颜色,并从波长选择基板23输出。
    • 57. 发明授权
    • Optical pick-up head apparatus wherein hollographic optical element and
photodetector are formed on semiconductor substrate
    • 其中全息光学元件和光电探测器形成在半导体衬底上的光学拾取头装置
    • US5293038A
    • 1994-03-08
    • US35777
    • 1993-03-23
    • Shinichi KadowakiYoshiaki KommaSeiji Nishino
    • Shinichi KadowakiYoshiaki KommaSeiji Nishino
    • G11B7/085G11B7/09G11B7/12G11B7/135H01J3/14
    • G11B7/1353G11B7/123
    • An optical pick-up head apparatus to be used for recording and reproducing or erasing optical information on and from an optical storage medium. The head apparatus comprises a semiconductor laser source, a reflector, a reflection type holographic optical element and a photodetector. A laser beam emitted from the semiconductor laser source is incident through the reflector on the reflection type holographic optical element so as to be incident through an objective lens on the optical storage medium. The laser beam reflected and diffracted on the optical storage medium advances along the same path in the opposite direction to be incident on the reflection type holographic optical element to become diffraction beams. The diffraction beams are incident on the photodetector after being reflected on the reflector so as to obtain a focusing error signal, tracking error signal and information signal. The reflection type holographic optical element and the photodetector are formed on one semiconductor substrate, and the semiconductor laser source is disposed to be close to the photodetector on the semiconductor substrate. Due to this arrangement, the head apparatus can easily and accurately be assembled without the positional adjustment of the reflection type holographic optical element or the photodetector, thereby improving the mass productivity of the head apparatus.
    • 一种用于在光学存储介质上记录和再现或擦除光学信息的光学拾取头装置。 头装置包括半导体激光源,反射器,反射型全息光学元件和光电检测器。 从半导体激光源发射的激光束通过反射型入射到反射型全息光学元件上,从而通过光学存储介质上的物镜入射。 在光存储介质上反射和衍射的激光束沿相反方向前进,入射到反射型全息光学元件上,成为衍射光束。 衍射光束在反射器上反射后入射到光电检测器上,以获得聚焦误差信号,跟踪误差信号和信息信号。 反射型全息光学元件和光电检测器形成在一个半导体衬底上,并且半导体激光源设置成靠近半导体衬底上的光电检测器。 由于这种布置,头部装置可以容易且准确地组装而不需要反射型全息光学元件或光电检测器的位置调整,从而提高了头部装置的批量生产率。