Image scanner and display apparatus

• US 5,929,845 A
• Filed: 09/03/1996
• Issued: 07/27/1999
• Est. Priority Date: 09/03/1996
• Status: Expired due to Term

• Current Assignee: Universal Display Corporation
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Lee, Hsing-chung, So, Franky, Wei, Chengping
• Primary Examiner(s): Zimmerman, Mark K.
• Assistant Examiner(s): Laneau, Ronald
• Application Number:
  US08/707,035
• Time in Patent Office: 1,057 Days
• Field of Search: 345/156, 345/155, 345/104, 345/87, 345/82, 345/76, 382/312, 382/313, 382/318, 382/319
• US Class Current: 345/156
• CPC Class Codes: G09G 3/3216 using a passive matrix
• CPC Class Codes: H01L 27/146 Imager structures
• CPC Class Codes: H01L 31/125 Composite devices with photosensitive elements and electroluminescent elements within one single body
• CPC Class Codes: H04N 1/00127 Connection or combination of a still picture apparatus with another apparatus, e.g. for storage, processing or transmission of still picture signals or of information associated with a still picture
• CPC Class Codes: H04N 1/028 for picture information pick-up
• CPC Class Codes: H04N 1/02805 with photodetectors arranged in a two-dimensional array
• CPC Class Codes: H04N 1/02815 Means for illuminating the original, not specific to a particular type of pick-up head
• CPC Class Codes: H04N 1/0288 using a two-dimensional light source, e.g. two-dimensional LED array
• CPC Class Codes: H04N 1/195 the array comprising a two-dimensional array or a combination of two-dimensional arrays
• CPC Class Codes: H04N 2201/02495 Constructional details not otherwise provided for, e.g. for ease of assembly, allowing access to the scanning elements, integrated reinforcing members
• CPC Class Codes: H10K 59/10 OLED displays
• CPC Class Codes: H10K 59/65 OLEDs integrated with inorganic image sensors

Abstract

Image scanner and display apparatus including an array of organic electroluminescent devices, each device operating as a light emitter when forward biased and as a light detector when reverse biased. Electronics coupled to the array and having a display mode and a scanner mode, the electronics sequentially forward biasing the array of organic electroluminescent devices, one row at a time, to emit light in the display mode, and sequentially forward biasing alternate columns of devices to emit light, one column at a time, and reverse biasing an associated column of devices for detecting light in the scanning mode, whereby light emitted from a forward biased column and reflected by information being scanned is received by the reverse biased associated column.

Claims

1. Image scanner and display apparatus comprising:

an array of photonic devices arranged into rows and columns, the columns of photonic devices including a first plurality of spaced apart columns of light emitting devices and a second plurality of columns of light detecting devices alternately positioned between the first plurality of spaced apart columns of light emitting devices so that each column of the first plurality of spaced apart columns has an associated second column of light detecting devices; and

electronics coupled to the array of photonic devices and having a display mode or operation and a scanner mode of operation, the electronics being constructed to operate in the display mode to sequentially forward bias the array of organic electroluminescent devices in accordance with image data supplied thereto, one row at a time, to emit light and to produce an image representative of the data supplied, and to operate in the scanner mode to sequentially forward bias the first plurality of spaced apart columns of light emitting devices, one column at a time, to emit light and to reverse bias the associated second column of light detecting devices for each first column forward biased, whereby light emitted from forward biased first columns and reflected by information being scanned is received by the reverse biased associated second column.

2. Image scanner and display apparatus as claimed in claim 1 wherein the electronics includes a shift register connected to the array so as to shift image data into the array one row at a time.

3. Image scanner and display apparatus as claimed in claim 2 wherein the image scanner and display are incorporated into an electronic device and receive the image data from the electronic device.

4. Image scanner and display apparatus as claimed in claim 3 wherein the electronic device is one of a two way radio, a cellular telephone, a pager, a smart card reader, or a data bank.

5. Image scanner and display apparatus as claimed in claim 1 wherein the first and second columns alternate across the entire array.

6. Image scanner and display apparatus as claimed in claim 1 wherein the array of photonic devices includes organic light emitting devices.

7. Image scanner and display apparatus comprising:

an array of organic electroluminescent devices arranged into rows and columns, each organic electroluminescent device being constructed to operate as a light emitter when forward biased and to act as a light detector when reverse biased, the array of organic electroluminescent devices including a first plurality of spaced apart columns of organic electroluminescent devices and a second plurality of columns of organic electroluminescent devices alternately positioned between the first plurality of spaced apart columns of light emitting devices so that each column of the first plurality of spaced apart columns has an associated second column of organic electroluminescent devices; and

electronics coupled to the array of organic electroluminescent devices and having a display mode of operation and a scanner mode of operation, the electronics being constructed to operate in the display mode to sequentially forward bias the array of organic electroluminescent devices in accordance with image data supplied thereto, one row at a time, to emit light and to produce an image representative of the data supplied, and to operate in the scanner mode to sequentially forward bias the first plurality of spaced apart columns of organic electroluminescent devices, one column at a time, to emit light and to reverse bias the associated second column of organic electroluminescent devices for each first column forward biased, whereby light emitted from forward biased first columns and reflected by information being scanned is received by the reverse biased associated second column.

8. Image scanner and display apparatus as claimed in claim 7 wherein the electronics are connected to a source of data to receive image data and to provide an image representative of received image data.

9. Image scanner and display apparatus as claimed in claim 8 wherein the electronics includes a shift register connected to the array so as to shift image data into the array one row at a time.

10. A method of scanning an image comprising the steps of:

providing an array of photonic devices arranged into rows and columns, the columns of photonic devices including a first plurality of columns, with each photonic device in the first plurality of columns being sequentially forward biased to operate as a light emitting device, and a second plurality of columns with each photonic device in the second plurality of columns being sequentially reverse biased to operate as a light detecting device, the second plurality of columns being positioned adjacent the first plurality of columns of light emitting devices so that each column of the first plurality of spaced apart columns has an associated second column of photonic devices;

providing electronics coupled to the array of photonic devices and having a display mode of operation and a scanner mode of operation;

sequentially forward biasing the array of photonic devices in the display mode in accordance with image data supplied thereto, one row at a time, to emit light and to produce an image representative of the data supplied;

sequentially forward biasing in the scanner mode the first plurality of columns of light emitting devices, one column at a time, to emit light and sequentially reverse biasing the associated second column of light detecting devices for each first column sequentially forward biased, to detect light; and

directing light emitted by each sequentially forward biased first column onto information to be scanned so that light emitted from sequentially forward biased first columns is reflected by information being scanned and received by the associated sequentially reversed biased second column.

11. A method of scanning an image as claimed in claim 10 wherein the step of providing the array of photonic devices includes providing an array of organic electroluminescent devices.

12. A method of scanning an image as claimed in claim 11 wherein the step of providing the array of photonic devices further includes providing an array of organic electroluminescent devices each constructed to operate as a light emitter when forward biased and to act as a light detector when reverse biased.

13. A method of scanning an image and displaying an image comprising the steps of:

providing an array of organic electroluminescent devices arranged into rows and columns and each constructed to operate as a light emitter when forward biased and to operate as a light detector when reverse biased;

providing electronics coupled to the array of organic electroluminescent devices and having a display mode of operation and a scanner mode of operation;

supplying image data to the array, one row at a time, representative of an image to be displayed;

sequentially forward biasing the array of organic electroluminescent devices, one row at a time, in the display mode in accordance with the image data supplied thereto, to emit light and provide an image representative of the image data supplied; and

sequentially forward biasing in the scanner mode a first plurality of columns of light emitting devices, one column at a time, to emit light and sequentially reverse biasing an associated second column of organic electroluminescent devices for each first column sequentially forward biased, to detect light, and directing light emitted by each sequentially forward biased first column onto information to be scanned so that light emitted from sequentially forward biased first columns is reflected by information being scanned and received by the associated sequentially reversed biased second column in a scanning mode.

14. A method of scanning an image and displaying an image as claimed in claim 13 including in addition a step of incorporating the image scanner and display into an electronic device and receiving the image data from the electronic device.