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    • 1. 发明专利
    • ACTIVE MATRIX PIXEL DRIVING CIRCUIT
    • JPH10115818A
    • 1998-05-06
    • JP19574297
    • 1997-07-22
    • HUGHES AIRCRAFT CO
    • GRINBERG JAN
    • G02F1/133G09G3/20G09G3/36
    • PROBLEM TO BE SOLVED: To provide a pixel driving circuit using a transistor without necessitating a large area semiconductor region and attaining a high production efficiency. SOLUTION: This circuit is provided with a switching device T1 transferring a voltage from an input to an output at an on time, the transistor T2 controlled by its output voltage and modulating an AC current in current circuit terminals 40, 43, a light modulation element 44 modulating light according to this modulated AC current and providing impedance serial to the transistor T2 when the AC current flows in the first direction and capacitance Ca imparting the impedance nearly equal to the impedance of the light modulation element 44 and connected serially to the transistor T2 while the AC current flows in the second direction, and these impedance form a symmetric follower circuit having the transistor T2, and keep the voltage applied to the transistor T2 substantially constant when the switching device is turned off.
    • 2. 发明申请
    • NEAR BANDGAP RADIATION MODULATION SPATIAL LIGHT MODULATORS
    • 近波段辐射调制空间光调制器
    • WO8800358A3
    • 1988-01-28
    • PCT/US8701193
    • 1987-05-26
    • HUGHES AIRCRAFT CO
    • EFRON UZIGRINBERG JAN
    • H01L27/148G02F1/01G02F1/015G02F1/017G02F1/17H01L31/0264H01L31/14
    • B82Y20/00G02F1/0126G02F1/017G02F1/01716G02F2203/12
    • A near bandgap radiation modulation spatial light modulator (NBRM-SLM) using multiple quantum wells (MQWs) (34). Generally, the MQW NBRM SLM of the present invention comprises a MQW optical modulator (34) and driver means for driving the MQW optical modulator. The MQW NBRM SLMs of the present invention can be configured in a plurality of configurations. The driver and MQW optical modulator may be configured in hybrid or monolithic configurations. The MQW optical modulator can be operated in either transverse or longitudinal electric field modes. The MQW NBRM SLM structures can be operated using either electroabsorption or electrorefraction effects, and in transmissive or reflective modes. The structures are operable with different addressing and write-in mechanisms, including photo-activation and electronic addressing. Alternate embodiments have special features such as cascaded heterojunction MQWs and pixelized submicron metal mirror. The disclosed invention provides an improved, high speed, high resolution, semiconductor drive-compatible, spatial light modulator using multiple quantum wells.
    • 使用多量子阱(MQW)(34)的近能带隙辐射调制空间光调制器(NBRM-SLM)。 通常,本发明的MQW NBRM SLM包括MQW光调制器(34)和用于驱动MQW光调制器的驱动装置。 本发明的MQW NBRM SLM可以配置成多种配置。 驱动器和MQW光调制器可以配置为混合或单片配置。 MQW光调制器可以在横向或纵向电场模式下工作。 MQW NBRM SLM结构可以使用电吸收或电折射效​​应以及透射或反射模式进行操作。 这些结构可用不同的寻址和写入机制进行操作,包括光激活和电子寻址。 替代实施例具有特殊特征,例如级联异质结MQW和像素化亚微米金属镜。 所公开的发明提供了一种使用多量子阱的改进的高速高分辨率半导体驱动兼容的空间光调制器。
    • 6. 发明专利
    • DE3880046T2
    • 1993-07-15
    • DE3880046
    • 1988-01-25
    • HUGHES AIRCRAFT CO
    • GRINBERG JANKODA JREIF GBLEHA PWELKOWSKY SLEDEBUHR G
    • G02F1/135G02F1/13G02F1/133G02F1/1333
    • An electron beam addressed liquid crystal light valve (LCLV) produces an AC voltage across a liquid crystal layer from a single polarity electron beam, and exhibits very high resolution. A thin layer of partially conductive material is deposited on a support membrane on the electron beam side of the liquid crystal. A conductive, electron beam permeable sheet is formed on the back of the partially conductive layer. Electrons from the beam are absorbed by the partially conductive layer, and then flow back out to the conductive sheet to produce an AC voltage prior to the next electron beam scan. The conductive sheet is connected in circuit with a transparent electrode which provides a voltage reference on the readout side of the liquid crystal. The device is designed with electrical parameters that produce a discharge rate from the partially conductive layer fast enough to complete an AC cycle between successive electron beam scans, but slow enough for the liquid crystal to respond and produce an image. A separate mirror can be provided to reflect the readout beam back through the liquid crystal, or the conductive sheet can itself serve as a mirror.