Display system for wireless pager

• US 6,559,825 B2
• Filed: 04/07/1997
• Issued: 05/06/2003
• Est. Priority Date: 10/31/1996
• Status: Expired due to Term

• Current Assignee: Kopin Corporation
• Original Assignee: Kopin Corporation
• Inventors: Jacobsen, Jeffrey, Fan, John C. C., Pombo, Stephen A., Zavracky, Matthew, Bumgardner, Rodney, Richard, Alan
• Primary Examiner(s): WU, XIAO MIN
• Application Number:
  US08/838,420
• Publication Number:
  US 20010043174A1
• Time in Patent Office: 2,220 Days
• Field of Search: 345/88, 345/87, 345/102, 345/4, 345/5, 345/82, 345/83, 345/32, 345/211, 345/212, 345/213, 340/825.44, 340/7.1, 340/7.32, 349/57, 349/58, 349/61, 349/62
• US Class Current: 345/102
• CPC Class Codes: G02B 25/002 Magnifying glasses
• CPC Class Codes: G09G 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2310/0235 Field-sequential colour display
• CPC Class Codes: G09G 2310/0283 Arrangement of drivers for different directions of scanning
• CPC Class Codes: G09G 2310/063 Waveforms for resetting the whole screen at once
• CPC Class Codes: G09G 2320/0209 Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2340/0407 Resolution change, inclusive of the use of different resolutions for different screen areas
• CPC Class Codes: G09G 2340/0492 Change of orientation of the displayed image, e.g. upside-down, mirrored
• CPC Class Codes: G09G 3/001 using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background slide projectors per se G03B23/00 = 42 HP
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• 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: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12
• CPC Class Codes: G09G 5/39 Control of the bit-mapped memory
• CPC Class Codes: G09G 5/391 Resolution modifying circuits, e.g. variable screen formats
• CPC Class Codes: H04M 1/0202 Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets constructional features of telephone transmitters or receivers, e.g. of speakers or microphones H04M1/03
• CPC Class Codes: H04M 1/021 : using combined folding and rotation motions combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0214 : Foldable telephones, i.e. with body parts pivoting to an open position around an axis parallel to the plane they define in closed position combined with translation movement H04M1/0235
• CPC Class Codes: H04M 1/0247 : comprising more than two body parts
• CPC Class Codes: H04M 1/0254 : comprising one or a plurality of mechanically detachable modules
• CPC Class Codes: H04M 1/0264 : for a camera module assembly
• CPC Class Codes: H04M 2250/20 : including a rotatable camera
• CPC Class Codes: H04N 7/142 : Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
• CPC Class Codes: H04N 9/3141 : Constructional details thereof details not peculiar to the presence of an electronic spatial light modulator G03B21/14

Abstract

The invention relates to a microdisplay system that utilizes a small high resolution active matrix liquid crystal display with an illumination system and a magnifying optical system to provide a hand held communication display device. The system can employ an LED illumination system and cellular communication or processor circuits within a compact housing to provide communication devices such as pagers, telephones, televisions, and hand held computer or card reader devices with a compact high resolution data and/or video display.

Claims

1. A wireless pager comprising:

a housing having a plurality of control elements;

a wireless receiver that is mounted within the housing and receives image data from a source;

a display circuit that is electrically connected to the receiver and generates display data;

a matrix display that is mounted to the housing and presents the display data from the display circuit as an image, the matrix display having an array of at least 320 by 240 pixel electrodes;

a light emitting diode (LED) that is mounted within the housing and is optically coupled to the display for illuminating the image on the display;

an optical system that is positioned along an optical path with the display and magnifies the image on the display for viewing by a user;

a battery in the housing that provides electrical power of less than 0.2 watts to the display and the LED;

a display module having the matrix display, the LED, and the optical system, the display module having a volume of less than 20 cm³; and

a power management circuit that controls the power consumption of the display circuit such that after the image is illuminated, the power management circuit lowers the power consumption of the display circuit until display data for the next image is ready to be presented on the matrix display, without comparing the images.

2. The wireless pager of claim 1 wherein the housing comprises a first display port for the matrix display and a second display port for a second display.

3. The wireless pager of claim 2 wherein the matrix display comprises a color liquid crystal display.

4. The wireless pager of claim 1 wherein the matrix display further comprises an array of transistor circuits formed with single crystal silicon, the array of transistor circuits being bonded to an optically transmissive substrate with an adhesive layer.

5. The wireless pager of claim 1 wherein the display circuit further comprises a color sequential display circuit for producing a multi-color image.

6. The wireless pager of claim 1 wherein the matrix display is a color sequential display system including an active matrix liquid crystal display, and the light emitting diode (LED) that illuminates the display has a plurality of LEDs that emit a plurality of colors.

7. The wireless page of claim 1 wherein the display module has a volume of less than 12 cm³.

8. The wireless pager of claim 1 wherein the display circuit includes a timing circuit switch that controls when the display circuit actuates the pixel electrodes and flashes the LED, and when the power management circuit lowers the power consumption of the display circuit.

9. The wireless pager of claim 1 wherein the power management circuit lowers the power consumption of the display circuit between sequentially generated display data.

10. A wireless pager comprising:

a housing having a plurality of control elements;

a wireless receiver that is mounted within the housing and receives image data from a source;

a display circuit connected to the receiver;

a color sequential matrix display mounted to the housing, electrically connected to the display circuit, and optically coupled to a light emitting diode (LED), the matrix display having an array of pixel electrodes being operated by the display circuit to display a first image illuminated with a first primary color and subsequently display a second image illuminated with a second primary color, the first and second images being displayed in sequence to form a colored image;

an optical system positioned along an optical path with the matrix display to magnify the illuminated images for viewing by a user;

a display module having the matrix display, the LED, and the optical system, where the display module has a volume of less than 20 cm³;

a battery in the housing that provides electrical power of less than 0.2 watts to the matrix display and the LED; and

a power management circuit that controls the power consumption of the display circuit such that after each image is illuminated, the power management circuit lowers the power consumption of the display circuit until the next image is ready to be displayed.

11. The wireless pager of claim 10 wherein the housing comprises a first display port for the matrix display and a second display port.

12. The wireless pager of claim 11 wherein the matrix display comprises an active matrix liquid crystal display.

13. The wireless pager of claim 10 wherein the matrix display further comprises an array of transistor circuits formed with single crystal silicon, the array of transistor circuits being bonded to an optically transmissive substrate with an adhesive layer.

14. The wireless pager of claim 10 wherein the LED that illuminates the matrix display is an LED backlight.

15. The wireless pager of claim 10 further comprising a control circuit and a memory circuit for storing the multi-color image in components.

16. The wireless page of claim 10 wherein the display module has a volume of less than 12 cm³.

17. The wireless pager of claim 10 wherein the display circuit includes a timing circuit switch that controls when the display circuit actuates the pixel electrodes and flashes the LED, and when the power management circuit lowers the power consumption of the display circuit.

18. A wireless pager comprising:

a housing having a plurality of control elements;

a wireless receiver that is mounted within the housing and receives data from a source;

a display circuit connected to the wireless receiver;

a matrix display that is mounted to the housing and optically coupled to a light emitting diode (LED) and that displays an image generated by the display circuit and illuminated by the LED, the matrix display having at least 75,000 pixel electrodes defining an active area of less than 160 mm²;

a power management circuit that controls the power consumption of the display circuit such that after the image is illuminated, the power management circuit lowers the power consumption of the display circuit until display data for the next image is generated by the display circuit, without comparing the images;

an optical system along an optical path with the matrix display that magnifies the illuminated image; and

a battery in the housing that provides electrical power of less than 0.2 watts to the display and the LED.

19. The wireless pager of claim 18 wherein the housing comprises a first display port for the matrix display and a second display port.

20. The wireless pager of claim 18 wherein the matrix display further comprises an array of transistor circuits formed with single crystal silicon, the array of transistor circuits being bonded to an optically transmissive substrate with an adhesive layer.

21. The wireless page of claim 18 further comprising a color sequential display circuit for producing a multi-color image.

22. The wireless pager of claim 18 herein the matrix display is a color sequential display system including an active matrix liquid crystal display and the LED is a backlight that illuminates the display and has a plurality of colored LEDs.

23. The wireless pager of claim 18 further comprising a display module having the display, and a light source, the display module having a volume of less than 20 cm³.

24. The wireless pager of claim 18 wherein the display circuit includes a timing circuit switch that controls when the display circuit actuates the pixel electrodes and flashes the LED, and when the power management circuit lowers the power consumption of the display circuit.

25. The wireless pager of claim 18 wherein the power management circuit lowers the power consumption of the display circuit between sequentially generated display data.

26. A wireless pager comprising:

a housing having a plurality of control elements;

a wireless receiver mounted within the housing and receives data from a source;

a display circuit that is electrically connected to the receiver and generates display data;

an active matrix liquid crystal display that is mounted to the housing and optically coupled to a light emitting diode (LED) to illuminate the image, and that displays the display data from the display circuit as an image, the matrix display having an array of at least 320 by 240 pixel electrodes defining an active area of 160 mm² or less;

a power management circuit that controls the power consumption of the display circuit such that after the image is illuminated, the power management circuit lowers the power consumption of the display circuit until display data for the next image is displayed, without comparing the images;

an optical system along an optical path with the display to magnify the image;

a display housing holding the display, the LED and the optical system and having

a volume of less than 20 cm³; and

a battery in the housing that provides power of less than 0.2 watts to the display and the LED.

27. The wireless pager of claim 26 wherein the housing comprises a first display port for the matrix display and a second display port for a second display.

28. The wireless pager of claim 26 wherein the display circuit includes a timing circuit switch that controls when the display circuit actuates the pixel electrodes and flashes the LED, and when the power management circuit lowers the power consumption of the display circuit.

29. The wireless pager of claim 26 wherein the power management circuit lowers the power consumption of the display circuit between sequentially generated display data.