Slide projector mountable light valve display

• US 5,396,304 A
• Filed: 02/10/1993
• Issued: 03/07/1995
• Est. Priority Date: 12/31/1990
• Status: Expired due to Fees

• Current Assignee: Kopin Corporation
• Original Assignee: Kopin Corporation
• Inventors: Striegler, Thomas, O'Connor, Kevin, Chastain, David, Beck, Benjamin, Zavracky, Matthew, Arney, Michel, Hunter, Gregory, Offsey, Stephen, Salerno, Jack P.
• Primary Examiner(s): Cuchlinski, Jr., William A.
• Assistant Examiner(s): Dowling, William C.
• Application Number:
  US08/016,138
• Time in Patent Office: 755 Days
• Field of Search: 353/122, 353/119, 353/120, 353/DIG. 5, 353/DIG. 3, 353/103, 359/83
• US Class Current: 353/122
• CPC Class Codes: A61B 3/113 for determining or recording eye movement
• CPC Class Codes: G02B 2027/0198 System for aligning or maintaining alignment of an image in a predetermined direction
• CPC Class Codes: G02B 27/0093 with means for monitoring data relating to the user, e.g. head-tracking, eye-tracking
• CPC Class Codes: G03B 21/2053 Intensity control of illuminating light controlled by video signal processing H04N5/74 or H04N9/31
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0259 with use of an analog or digital ramp generator in the column driver or in the pixel circuit
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2320/043 Preventing or counteracting the effects of ageing
• CPC Class Codes: G09G 2340/0464 Positioning
• CPC Class Codes: G09G 2370/04 Exchange of auxiliary data, i.e. other than image data, between monitor and graphics controller
• CPC Class Codes: G09G 2370/042 for monitor identification
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/30 using electroluminescent panels
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: H01L 2221/68359 : used as a support during manufacture of interconnect decals or build up layers
• CPC Class Codes: H01L 2221/68363 : used in a transfer process involving transfer directly from an origin substrate to a target substrate without use of an intermediate handle substrate
• CPC Class Codes: H01L 27/1214 : comprising a plurality of TFTs formed on a non-semiconducting substrate, e.g. driving circuits for AMLCDs
• CPC Class Codes: H01L 27/1266 : the substrate on which the devices are formed not being the final device substrate, e.g. using a temporary substrate
• CPC Class Codes: H01L 27/156 : two-dimensional arrays
• CPC Class Codes: H01L 29/786 : Thin film transistors, i.e. transistors with a channel being at least partly a thin film transistors having only the source or the drain region on an insulator layer H01L29/0653; thin film FinFETs H01L29/785
• CPC Class Codes: H01L 29/78603 : characterised by the insulating substrate or support H01L29/78657 takes precedence
• CPC Class Codes: H01L 29/78612 : for preventing the kink- or the snapback effect, e.g. discharging the minority carriers of the channel region for preventing bipolar effect
• CPC Class Codes: H01L 29/78618 : characterised by the drain or the source properties, e.g. the doping structure, the composition, the sectional shape or the contact structure silicide contacts, electrodes in general H01L29/458
• CPC Class Codes: H01L 29/78633 : with a light shield
• CPC Class Codes: H01L 29/78648 : arranged on opposing sides of the channel
• CPC Class Codes: H04N 5/70 : Circuit details for electroluminescent devices
• CPC Class Codes: H04N 5/74 : Projection arrangements for image reproduction, e.g. using eidophor
• CPC Class Codes: H04N 5/7441 : the modulator being an array of liquid crystal cells
• CPC Class Codes: H04N 5/7491 : of head mounted projectors
• CPC Class Codes: H04N 9/3105 : for displaying all colours simultaneously, e.g. by using two or more electronic spatial light modulators simultaneous projection in colour photography G03B33/10; beam splitting or combining systems per se G02B27/10
• CPC Class Codes: H04N 9/312 : Driving therefor driving of electronic spatial light modulators in displays other than projection devices G09G3/34, G09G3/36; control of liquid crystal elements G02F1/133; control of micromechanical modulators G02B26/08
• CPC Class Codes: H04N 9/3141 : Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14
• CPC Class Codes: H04N 9/3144 : Cooling systems cooling of liquid crystal cells in general G02F1/133382; cooling of projectors not peculiar to the presence of an electronic spatial light modulator G03B21/16
• CPC Class Codes: H05B 33/12 : Light sources with substantially two-dimensional radiating surfaces

Abstract

A display panel is formed using a single crystal thin-film transistors that are transferred to substrates for display fabrication. Pixel arrays form light valves or switches that can be fabricated with color filter elements over the pixel elements. The resulting circuit panel is then incorporated into a color projection display system with a light emitting or liquid crystal material to provide the desired light valve.

Claims

1. A housing for a slide projector mounted light valve display comprising:

a housing having a securing mechanism to secure the housing to the slide projector;

a light valve display movable between a first position and a second position, the first position being within the housing and the second position being outside the housing; and

a switching mechanism for actuating movement of the display between the first position and the second position.

2. The housing of claim 1 wherein the securing mechanism registers to a spindle of the slide projector.

3. The housing of claim 1 wherein the securing mechanism registers to a frame tab of the slide projector.

4. The housing of claim 1 wherein the securing mechanism secures to a slide well of the slide projector.

5. The housing of claim 1 wherein the display is an active matrix liquid crystal display.

6. The housing of claim 1 wherein the switching mechanism is manually operated.

7. The housing of claim 1 wherein the switching mechanism is automated.

8. The housing of claim 1 wherein the switching mechanism comprises a spring, the spring assisting in moving the display.

9. The housing of claim 8 wherein the spring assists in moving the display from the first to the second position.

10. The housing of claim 8 wherein the spring assists in moving the display from the second to the first position.

11. The housing of claim 1 further comprising a video interface coupled between the display and a remote video source.

12. The housing of claim 11 wherein the video source is a computer.

13. The housing of claim 11 wherein the video source generates a composite video signal.

14. The housing of claim 11 further comprising a remote control receiver, the video source being responsive to remote control signals received by the receiver.

15. The housing of claim 14 wherein the remote control receiver comprises an infrared detector.

17. The housing of claim 1 wherein the display is an active matrix liquid crystal display.

18. The housing of claim 1 wherein the switching mechanism is manually operated.

16. A housing for a slide projector mounted liquid crystal display comprising:

a housing adapted to be positioned on a slide projector assembly;

a liquid crystal display movable through an aperture in the housing between a first position and a second position, the first position being within the housing and the second position being outside the housing; and

a switching mechanism for actuating movement of the display between the first position and second position.

19. A method of projecting images on a viewing surface with a slide projector mounted light valve display comprising:

securing a light valve housing to a slide projector with a securing mechanism;

moving the light valve display that is attached to the housing into a slide chamber of the slide projector such that the light valve display is positioned between a light source within the slide projector and a projection lens on the slide projector;

directing light from the light source within the slide projector through the light valve; and

actuating the light valve to selectively control light transmission through the light valve such that an image is projected on the viewing surface.

20. The method of claim 19 wherein the securing step comprises registering the housing on a spindle of the slide projector.

21. The method of claim 20 wherein the securing mechanism comprises a tab cutout positioned on the housing.

22. The method of claim 21 wherein the securing step further comprises mounting the tab cutout over spindle tab of the slide projector spindle and rotating the housing to align the light valve display over the slide chamber.

23. The method of claim 19 wherein the moving step comprises moving step comprises moving a slide handle from a first position to a second position.

24. The method of claim 19 wherein the securing mechanism comprises a channel on the housing.

25. A housing for a slide projector mounted light valve display comprising:

a housing having a spindle mount to secure the housing to a spindle of the slide projector;

a light valve display movable between a first position and a second position, the first position being within the housing and the second position being outside the housing; and

an opening in the housing through which the light valve display can be moved into a slide chamber of the slide projector.

26. The housing of claim 25 further comprising a the securing mechanism that registers the housing to a spindle of the slide projector.

27. The housing of claim 26 wherein the securing mechanism registers to a frame tab of the slide projector.

28. The housing of claim 26 wherein the securing mechanism secures to a slide well of the slide projector.

29. The housing of claim 25 wherein the display is an active matrix liquid crystal display.

30. The housing of claim 25 further comprising a switching mechanism to move the display and which is manually operated.