Digital display with integrated computing circuit

• US 8,624,882 B2
• Filed: 02/10/2011
• Issued: 01/07/2014
• Est. Priority Date: 02/10/2011
• Status: Active Grant

• Current Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Original Assignee: Global OLED Technology LLC (LG Display Co., Ltd.)
• Inventors: Cok, Ronald S., Hamer, John W., Miller, Michael E.
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US13/024,799
• Publication Number:
  US 20120206421A1
• Time in Patent Office: 1,062 Days
• Field of Search: 345/76, 345/77, 345/55, 345/82, 345/92, 345/99, 345/100, 345/204, 345/205, 315/169.3
• US Class Current: 345/204
• CPC Class Codes: G09G 2300/026 Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• 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 3/2085 Special arrangements for addressing the individual elements of the matrix, other than by driving respective rows and columns in combination
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]

Abstract

A digital display device includes a display substrate; an array of pixels formed on the display substrate; an array of driving circuits located on the display substrate, each driving circuit electrically connected to one or more pixels for controlling a pixel current provided to each pixel; an array of computing circuits located on the display substrate, each computing circuit including circuits for signal or image processing and for communicating with neighboring computing circuits; a plurality of electrical conductors formed on the display substrate and connected to each of the driving circuits and digital computing circuits, wherein each computing circuit is connected with an electrical conductor to each of its neighbors in the array of computing circuits; and means for providing an image signal connected to one or more of the electrical conductors.

Claims

1. A digital display device, comprising:

(a) a display substrate having a display area on a device side;

(b) an array of pixels formed on the device side of the display substrate in the display area, each pixel including a first electrode, one or more layers of light-emitting material located over the first electrode, and a second electrode located over the one or more layers of light-emitting material, the pixels emitting light in response to a current passed through the one or more layers of light-emitting material by the first and second electrodes;

(c) an array of driving circuits located on the device side of the display substrate in the display area, each driving circuit electrically connected to one or more pixels for controlling a pixel current provided to each pixel;

(d) an array of computing circuits located on the device side of the display substrate in the display area, each computing circuit including circuits for signal or image processing and for communicating through a serial bus with neighboring computing circuits where the computing circuits are connected to the driving circuits through the serial bus;

(e) a plurality of conductors formed on the device side of the display substrate and connected to each of the driving circuits and digital computing circuits, wherein each computing circuit is connected with a conductor to each of its neighbors in the array of computing circuits;

(f) means for providing an image signal connected to one or more of the conductors.

5. The display device of claim 1, wherein the image signal is a digital serial signal.

6. The display device of claim 1, wherein each of the driving circuits has an associated and electrically connected computing circuit forming a pixel circuit.

7. The display device of claim 6, wherein the pixel circuits form a two-dimensional grid array in the display area and the pixel circuits are electrically connected with each of its neighbors in the array by a serial communication bus formed of the electrical conductors.

8. The display device of claim 1, further comprising a sensor in the computing circuit.

9. The display device of claim 8, wherein the sensor is an optical sensor, a pressure sensor, an inertial sensor, a temperature sensor, or a radiation sensor.

10. The display device of claim 1, wherein the computing circuit includes image-processing circuitry for processing the image signal.

11. The display device of claim 10, wherein the image signal is encoded and the computing circuit includes image-processing circuitry that decodes the image signal.

12. The display device of claim 11, further comprising a sensor in the computing circuit and wherein the computing circuit processes the image signal in response to the sensor.

13. The display device of claim 1, wherein the computing circuit includes an image frame-store.

14. The display device of claim 13, wherein the pixel array has fewer pixels than the image signal and the image frame-store stores more pixels than the pixel array.

15. The display device of claim 1, wherein the computing circuit is a digital circuit.

16. The display device of claim 15, wherein the computing circuit is a programmable circuit.

17. The display device of claim 1, wherein the conductor is an electrical conductor or an optical conductor.

2. A digital display device, comprising:

(a) a display substrate having a display area on a device side;

(b) an array of pixels formed on the device side of the display substrate in the display area, each pixel including a first electrode, one or more layers of light-emitting material located over the first electrode, and a second electrode located over the one or more layers of light-emitting material, the pixels emitting light in response to a current passed through the one or more layers of light-emitting material by the first and second electrodes;

(c) an array of driving circuits located on the device side of the display substrate in the display area, each driving circuit electrically connected to one or more pixels for controlling a pixel current provided to each pixel;

(d) an array of computing circuits located on the device side of the display substrate in the display area, each computing circuit including circuits for signal or image processing and for communicating with neighboring computing circuits;

(e) a plurality of conductors formed on the device side of the display substrate and connected to each of the driving circuits and digital computing circuits, wherein each computing circuit is connected with a conductor to each of its neighbors in the array of computing circuits;

(f) means for providing an image signal connected to one or more of the conductors; and

wherein the pixels are divided into mutually exclusive pixel groups, the pixels within each pixel group are organized in a two-dimensional array, and each pixel group is associated with one or more chiplets having at least one computing circuit for controlling the pixel group.

3. The display device of claim 2, wherein the computing circuits form a two-dimensional array and further comprising a passive-matrix row or column control circuit connected to each row or column of the two-dimensional array of computing circuits.

4. The display device of claim 3, wherein the passive-matrix row or column control circuit are provided in the chiplet(s).

18. A digital display device, comprising:

(a) a display substrate having a device side;

(b) an array of pixels formed on the device side of the display substrate in a display area, each pixel including a first electrode, one or more layers of light-emitting material located over the first electrode, and a second electrode located over the one or more layers of light-emitting material, the pixels emitting light in response to a current passed through the one or more layers of light-emitting material by the first and second electrodes;

(c) an array of driving circuits located on the device side of the display substrate in the display area, each driving circuit electrically connected to one or more pixels for controlling a pixel current provided to each pixel;

(d) an array of computing circuits located on the device side of the display substrate in the display area, each computing circuit including circuits for signal or image processing and for communicating through a serial bus with neighboring computing circuits where the computing circuits are connected to the driving circuits through the serial bus;

e) a plurality of electrical conductors formed on the device side of the display substrate and connected to each of the driving circuits and digital computing circuits, wherein each computing circuit is connected with an electrical conductor to each of its neighbors in the array of computing circuits; and

(f) means for providing an image signal connected to one or more of the electrical conductors; and

(g) wherein the driving circuits and computing circuits are provided in chiplets, each chiplet having a substrate separate and independent of the display substrate.

19. The display device of claim 18, further comprising an interface circuit that is connected to the array of computing circuits and to an external information source.

20. The display device of claim 18, wherein the driving circuits are provided in first chiplets and the computing circuits are provided in second chiplets separate and different from the first chiplets.

21. The display device of claim 18, wherein at least one of the driving circuits and at least one of the computing circuits are provided in the same chiplet.

22. The display device of claim 18, wherein the chiplets include one or more connection pads formed on the chiplet substrate, and wherein the connection pads physically contact the electrical conductors.

23. The display device of claim 18, wherein the pixels are divided into mutually exclusive pixel groups, the pixels within each pixel group are organized in a two-dimensional array, and each pixel group is controlled by one or more chiplets having at least one computing circuit associated with the pixel group.

24. The display device of claim 18, wherein each of the driving circuits has an associated and electrically connected computing circuit forming a pixel circuit.

25. The display device of claim 24, wherein the pixel circuits form a two-dimensional grid array in the display area and the pixel circuits are electrically connected with each of its neighbors in the array by a serial communication bus formed of the electrical conductors.