Display device having intergrated operating means

• US 6,445,368 B1
• Filed: 11/17/2000
• Issued: 09/03/2002
• Est. Priority Date: 03/27/1998
• Status: Expired due to Term

• Current Assignee: Japan Display Incorporated
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Nakajima, Yoshiharu
• Primary Examiner(s): Brier, Jeffery A.
• Assistant Examiner(s): Yang, Ryan
• Application Number:
  US09/714,654
• Time in Patent Office: 655 Days
• Field of Search: 345/94, 345/96, 345/98, 345/89, 345/90, 345/45, 345/44, 345/76, 345/81
• US Class Current: 345/76
• CPC Class Codes: G09G 2300/0417 Special arrangements specific to the use of low carrier mobility technology
• CPC Class Codes: G09G 2300/0809 Several active elements per pixel in active matrix panels
• CPC Class Codes: G09G 2300/0823 used to establish symmetry in driving, e.g. with polarity inversion
• CPC Class Codes: G09G 2300/0828 forming a digital to analog [D/A] conversion circuit
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 3/3208 organic, e.g. using organic light-emitting diodes [OLED]
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

In a liquid crystal display device including a display area having a liquid crystal layer between first and second substrates disposed to confront each other, the display area comprising a number of pixels, and an element for driving the liquid crystal layer of each pixel for display being provided on the surface of the first substrate at the liquid crystal layer side of each pixel, in addition to the element, an operating unit for performing predetermined operational processing on the basis of data input to each pixel and outputting the processed data is provided on the surface of the first substrate at the liquid crystal layer side of each pixel. An input register circuit, a memory and an output register circuit may be provided to each pixel. With this structure, the liquid crystal display device has not only the image display function, but also the operating function, whereby the productivity can be enhanced, the manufacturing cost can be reduced and the liquid crystal display device can be designed in compact size and light weight.

Claims

1. An electro luminescent (EL) display device comprising:

a first substrate having a display area;

a second substrate joined to the first substrate through a predetermined gap; and

an electro luminescent (EL) layer filled and held in the gap between said first substrate and said second substrate located at the opposite side to said first substrate, wherein said display area comprises;

a plurality of pixels;

an element for driving the electro luminescent (EL) layer of each pixel for display is provided on the surface of said first substrate at the electro luminescent(EL) display side of each pixels; and

operating means for performing predetermined operational processing on data input to each pixel and outputting processed data, said operating means comprising an operating unit which reads data from a memory, a register circuit connected to a control line, said operating means being provided on the surface of said first substrate at the electro luminescent (EL) layer side of said pixel in addition to said element.

3. The electro luminescent display device as claimed in claim 1, wherein output means for outputting, on the basis of processed data, data for displaying a pixel which performs the operational processing is provided on the surface of said first substrate at the liquid crystal layer side of said pixel.

4. The electro luminescent display device as claimed in claim 1, wherein storing means for storing data input to each pixel is provided on the surface of said first substrate at the liquid crystal layer side of said pixel, said operating means performs the predetermined operational processing on the basis of the data stored in said storage means.

5. The electro luminescent display device as claimed in claim 4, wherein input means for receiving both data for displaying a pixel and data from an adjacent pixel and outputting the data input thereto to said storage means is provided on the surface of said first substrate at the electro luminescent layer side of said pixel.

6. The electro luminescent display as claimed in claim 5, wherein an input circuit for receiving data for displaying a pixel and outputting the data thus input to said input means is provided on the peripheral portion of said display area.

7. The electro luminescent display device as claimed in claim 1, wherein a final output circuit for collectively outputting data output from respective pixels to the external is provided on the peripheral portion of said display area.

8. The electro luminescent display device as claimed in claim 1, further including a first controller for controlling said operating means of each pixel.

9. The electro luminescent display device as claimed in claim 3, further including a second controller for controlling said output means of each pixel.

10. The electro luminescent display device as claimed in claim 5, further including a third controller for controlling said input means of each pixel.

11. The electro luminescent display device as claimed in claim 10, wherein said input means has a selection switch for allowing one of said data for displaying said pixel or said data from the adjacent pixel to be selected as the data input to said input means, where said third controller has a switch control function for controlling said selection switch.

12. The electro luminescent display device as claimed in claim 1, wherein a reflection plate for reflecting light incident to said display area is provided between both of said element and said operating means and said electro luminescent layer on said first substrate.

13. The electro luminescent display device as claimed in claim 1, wherein said element comprises a polysilicon thin film transistor having an active layer of polysilicon, and said operating means is formed of said polysilicon thin film transistor.

2. An electro luminescent (EL) display device comprising:

a plurality of pixels of an electro luminescent (EL) display, and

a circuit for driving said pixels, wherein each pixel of said plurality of pixels includes;

a digital-to-analog circuit,

an operating unit that reads data from memory, and

a register circuit connected to a control line.

14. The display device as claimed in claim 2, wherein output means for outputting, on the basis of the processed data, data for displaying a pixel which performs the operational processing is provided on the surface of each pixel.

15. The display device as claimed in claim 2, wherein storage means for storing data input to each pixel is provided on the surface of said pixel, and an operating means performs predetermined operational processing on the basis of the data stored in said storage means.

16. The display device as claimed in claim 15, wherein said input means is provided on the surface of each pixel.

17. The display device as claimed in claim 16, wherein an input circuit which receives data for displaying pixels and outputs the data to said input means is provided to said input means for driving said pixels.

18. The display device as claimed in claim 2, wherein a final output circuit for collectively outputting the data output from said pixels is provided to said circuit for driving said pixels.

19. The display device as claimed in claim 2, further including a first controller for controlling an operating means of each pixel, said operating means performing predetermined operational processing on the basis of data input thereto and outputting the processed data.

20. The display device as claimed in claim 14, further including a second controller for controlling said output means of each pixel.

21. The display device as claimed in claim 16, further including a third controller for controlling said input means of each pixel.

22. The display device as claimed in claim 21, wherein said input means has a selection switch for allowing one of either said data for displaying pixels or data from the adjacent pixel to be selected as the data input to said input means, and said third controller has a switch control function for controlling said selection switch.

23. The display device as claimed in claim 2, wherein said element comprises a thin film transistor, and an operating means is formed of said thin film transistor, said operating means performing predetermined operational processing on the basis of the data stored in said storage means.

24. The display device as claimed in claim 23, wherein said thin film transistor is composed of a polysilicon thin film transistor.