DEVICE FOR DISPLAY OF IMAGE ON SCREEN

    公开(公告)号:JPH08271855A

    公开(公告)日:1996-10-18

    申请号:JP4709896

    申请日:1996-03-05

    Applicant: IBM

    Abstract: PROBLEM TO BE SOLVED: To provide an efficient and compact optical system for full color high resolution projection type display using a reflective double-refracting spatial light modulator such as a liquid crystal light valve. SOLUTION: This optical system is provided with reflective double-refracting light valves 26-28, a polarized beam splitter 22, color image coupling prisms 30-32, a lighting system 18, a projection lens 38, color/contrast control filters 43-46 and a screen 39 arranged in constitution to provide an advantage of high resolution color display. This optical system is provided with a quarter wavelength plate 48 arranged to suppress stray reflection from the projection lens 38. This optical system is also provided with a second quarter wavelength plate 50 arranged at the screen 39, and a polarizing film 52 arranged at the second quarter wavelength plate 50 so as to restrain the light in the surroundings from illuminating the screen 39 and entering the optical system.

    3.
    发明专利
    未知

    公开(公告)号:DE69611563D1

    公开(公告)日:2001-02-22

    申请号:DE69611563

    申请日:1996-02-13

    Applicant: IBM

    Abstract: An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for a high resolution color display. The system includes a quarter wave plate positioned to suppress stray reflection from the projection lens. The system also includes a second quarter wave plate disposed on the screen and a polarizing film disposed on the second quarter wave plate to suppress ambient light from illuminating the screen and entering the system.

    4.
    发明专利
    未知

    公开(公告)号:DE69003565D1

    公开(公告)日:1993-11-04

    申请号:DE69003565

    申请日:1990-02-19

    Applicant: IBM

    Abstract: Accurate voltage measurements on fast changing waveforms are carried out via stroboscopic tunneling potentionmetry using a tunneling microscope. The scanning tunneling microscope (STM) includes a test probe (22), having a test probe tip (23), and a sample (24) (with a conductor (25) supported thereon carrying the waveform to be sampled) arranged for measurement. The test probe (22) is supported so that the test probe tip (23) exhibits motion toward and away from the sample (24). The distance between the test probe tip (23) and the sample (24) modulates the tunneling current. In one embodiment, the test probe tip (23) is driven by a mechanical oscillator (100) to produce the desired motion. The mechanical oscillator (100) operates at a very high frequency (for example in the GHz ranges. The tunneling current flowing between the conductor (25) and the tip (23) which is a strong function of the instantaneous potential on the sample (24) is then determined by the convolution of the motion with the exponential dependence of current with respect to distance (between tip (23) and conductor (25)). Sampling is synchronized with the motion of the test probe tip (23). In other embodiments, the mechanical oscillator (100) is driven by a crystal oscillator (10) or replaced by an acoustic modulator in either tip (23) or sample (24) which has the effect of modulating the distance between tip (23) and sample (24) for the same purpose.

    8.
    发明专利
    未知

    公开(公告)号:DE69611563T2

    公开(公告)日:2001-06-21

    申请号:DE69611563

    申请日:1996-02-13

    Applicant: IBM

    Abstract: An optical system is described consisting of reflection birefringent light valves, polarizing beam splitter, color image combining prisms, illumination system, projection lens, filters for color and contrast control, and screen placed in a configuration offering advantages for a high resolution color display. The system includes a quarter wave plate positioned to suppress stray reflection from the projection lens. The system also includes a second quarter wave plate disposed on the screen and a polarizing film disposed on the second quarter wave plate to suppress ambient light from illuminating the screen and entering the system.

    9.
    发明专利
    未知

    公开(公告)号:DE69003565T2

    公开(公告)日:1994-05-11

    申请号:DE69003565

    申请日:1990-02-19

    Applicant: IBM

    Abstract: Accurate voltage measurements on fast changing waveforms are carried out via stroboscopic tunneling potentionmetry using a tunneling microscope. The scanning tunneling microscope (STM) includes a test probe (22), having a test probe tip (23), and a sample (24) (with a conductor (25) supported thereon carrying the waveform to be sampled) arranged for measurement. The test probe (22) is supported so that the test probe tip (23) exhibits motion toward and away from the sample (24). The distance between the test probe tip (23) and the sample (24) modulates the tunneling current. In one embodiment, the test probe tip (23) is driven by a mechanical oscillator (100) to produce the desired motion. The mechanical oscillator (100) operates at a very high frequency (for example in the GHz ranges. The tunneling current flowing between the conductor (25) and the tip (23) which is a strong function of the instantaneous potential on the sample (24) is then determined by the convolution of the motion with the exponential dependence of current with respect to distance (between tip (23) and conductor (25)). Sampling is synchronized with the motion of the test probe tip (23). In other embodiments, the mechanical oscillator (100) is driven by a crystal oscillator (10) or replaced by an acoustic modulator in either tip (23) or sample (24) which has the effect of modulating the distance between tip (23) and sample (24) for the same purpose.

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