Electronic device, method of driving electronic device, and electronic apparatus

• US 20040036664A1
• Filed: 06/09/2003
• Published: 02/26/2004
• Est. Priority Date: 06/12/2002
• Status: Abandoned Application

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Miyazawa, Takashi
• Application Number:
  US10/456,574
• Publication Number:
  US 20040036664A1
• Time in Patent Office: Days
• US Class Current: 345/76
• CPC Class Codes: G09G 2300/0842 forming a memory circuit, e.g. a dynamic memory with one capacitor
• CPC Class Codes: G09G 2310/0227 related to multiple interlacing, i.e. involving more fields than just one odd field and one even field
• CPC Class Codes: G09G 2310/0248 Precharge or discharge of column electrodes before or after applying exact column voltages
• CPC Class Codes: G09G 2310/0251 Precharge or discharge of pixel before applying new pixel voltage
• CPC Class Codes: G09G 2310/0267 Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
• CPC Class Codes: G09G 2310/0275 Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 3/3233 with pixel circuitry controlling the current through the light-emitting element
• CPC Class Codes: G09G 3/3241 the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
• CPC Class Codes: G09G 3/325 the data current flowing through the driving transistor during a setting phase, e.g. by using a switch for connecting the driving transistor to the data driver
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

To provide an electronic device which can reduce loads of circuits for supplying data to data lines. Pixel circuits 20 are disposed corresponding to intersections of scanning lines Yn and each of data lines Xm, and each of the corresponding scanning lines is selected to apply data signals or reset control signals through corresponding data lines. A scanning line driving circuit 13 outputs scan signals for selecting the scanning lines other than the scanning lines adjacent to the scanning line selected before at least one line based on address signals ADn when the scanning lines are selected in order to apply the data signals or the reset control signals through the data lines.

Claims

1. An electronic device comprising:

a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements; and

a control circuit for generating reset control signals to carry out reset operations of resetting to predetermined states the electronic elements which are included in at least one unit circuit among the plurality of unit circuits,

wherein output of the data signals to the plurality of data lines and the reset operations are alternately carried out.

11. The electronic device according to claim 1, wherein the data signals are multi-valued.

12. The electronic device according to claim 1, wherein current signals are applied as the data signals.

13. The electronic device according to claim 1, wherein the electronic elements are EL elements.

14. The electronic device according to claim 13, wherein the EL elements comprise light emitting layers which are made of organic materials.

26. An electronic apparatus comprising an electronic device according to claim 1.

2. An electronic device comprising:

a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, data signals and reset control signals for resetting the electronic elements to predetermined states being supplied to the plurality of unit circuits; and

a scanning line driving circuit for selecting a scanning line from the plurality of scanning lines in accordance with the supplied data signals,

wherein the scanning line driving circuit supplies scanning signals to the plurality of scanning lines so that a first scanning line which is selected from the plurality of scanning lines in order to apply the data signal to a first unit circuit among the plurality of unit circuits is not adjacent to a second scanning line which is selected from the plurality of scanning lines in order to subsequently supply the data signal to a second unit circuit among the plurality of unit circuits other than the first unit circuit; and

wherein during the time interval from the time that the data signal is supplied to the first unit circuit to the time that the data signal is supplied to the second unit circuit, the reset control signal is supplied to a third unit circuit other than the first unit circuit and the second unit circuit.

3. The electronic device according to claim 2, wherein among the plurality of scanning lines, a third scanning line corresponding to the third unit circuit is adjacent to the first scanning line and the second scanning line.

4. An electronic device comprising:

a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, data signals and reset control signals for resetting the electronic elements to predetermined states being supplied to the plurality of unit circuits; and

a scanning line driving circuit for selecting a scanning line from the plurality of scanning lines in accordance with the supplied data signals,

wherein the scanning line driving circuit supplies scanning signals to the plurality of scanning lines so that a first scanning line which is selected from the plurality of scanning lines in order to apply the data signal to a first unit circuit among the plurality of unit circuits is adjacent to a second scanning line which is selected from the plurality of scanning lines in order to subsequently supply the data signal to a second unit circuit among the plurality of unit circuits other than the first unit circuit; and

wherein during the time interval from the time that the data signal is supplied to the first unit circuit to the time that the data signal is supplied to the second unit circuit, the reset control signal is supplied to a third unit circuit other than the first unit circuit and the second unit circuit.

5. The electronic device according to claim 4, wherein a third scanning line corresponding to the third unit circuit among the plurality of scanning lines is not adjacent to the first scanning line and the second scanning line.

6. An electronic device comprising:

a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, data signals and reset control signals for resetting the electronic elements to predetermined states being supplied to the plurality of unit circuits; and

a scanning line driving circuit for selecting a scanning line from the plurality of scanning lines in accordance with the supplied data signals,

wherein the scanning line driving circuit alternately selects scanning lines for supplying the data signals thereto and scanning lines for supplying the reset control signals thereto.

7. An electronic device comprising:

a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising a first transistor which is controlled by a scan signal applied through the corresponding scanning line among the plurality of scanning lines, a storage element for holding a data signal applied through the first transistor, a second transistor whose conduction state is set in accordance with the data signals held at the storage element, and electronic elements having applied thereto voltages or currents having voltage levels or current levels in accordance with the conduction state of the set second transistor;

a data line driving circuit for outputting the data signals to the plurality of data lines; and

a scanning line driving circuit for supplying the scan signals to the plurality of unit circuits,

wherein during the time interval from the time that the data signal is supplied to a first unit circuit among the plurality of unit circuits to the time that the data signal is supplied to a second unit circuit other than the first unit circuit, a reset control signal for substantially turning off the second transistor in the storage element is supplied to a third unit circuit other than the first unit circuit and the second unit circuit through the corresponding data line among the plurality of data lines.

8. The electronic device according to claim 7, wherein the first scanning line of the plurality of scanning lines, corresponding to the first unit circuit is adjacent to the second scanning line, of the plurality of scanning lines, corresponding to the second unit circuit, and

wherein a third scanning line of the plurality of scanning lines, corresponding to the third unit circuit is not adjacent to the first scanning line and the second scanning line.

9. An electronic device according to claim 7, wherein the first scanning line, of the plurality of scanning lines, corresponding to the first unit circuit is adjacent to the third scanning line, of the plurality of scanning lines, corresponding to the third unit circuit, and

wherein the second scanning line, of the plurality of scanning lines, corresponding to the second unit circuit is not adjacent to the first scanning line, of the plurality of scanning lines, corresponding to the first unit circuit.

10. The electronic device according to claim 8, wherein when the reset control signal is supplied to the third unit circuit, the third scanning line is selected and the reset control signal is supplied to the storage element through the first transistor of the third unit circuit.

15. A method of driving an electronic device comprising a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, the method comprising the steps of:

supplying a data signal to a first unit circuit among the plurality of unit circuits through the corresponding data line among the plurality of data lines;

supplying a reset control signal for resetting to predetermined states the electronic elements which are included in a third unit circuit, other than the first unit circuit and the second unit circuit, among the plurality of unit circuits; and

supplying a data signal to a second unit circuit other than the first unit circuit among the plurality of unit circuits through the corresponding data line among the plurality of data lines.

16. The method of driving an electronic device according to claim 15, wherein a scanning line which is selected from the plurality of scanning lines in order to apply the data signal to the first unit circuit is adjacent to the scanning line corresponding to the third unit circuit among the plurality of scanning lines.

22. The method of driving an electronic device according to claim 15, wherein multi-valued or analog signals are applied as the data signals.

23. The method of driving an electronic device according to claim 15 wherein current signals are applied as the data signals.

24. The method of driving an electronic device according to claim 15, wherein each of the plurality of unit circuits comprises:

a first transistor which is controlled by a scan signal applied through the corresponding scanning line among the plurality of scanning lines;

a storage element for holding the data signal and the reset control signal applied through the first transistor as an electrical quantity corresponding thereto; and

a second transistor whose conduction state is set in accordance with the electrical quantity held at the storage element, the second transistor supplying to the electronic elements a voltage or current having a voltage level or current level corresponding to the conduction state,

wherein the reset control signal is supplied to the storage element to substantially turn off the conduction state of the second transistor, thereby to stop supplying voltage or current to the electronic elements.

25. The method of driving an electronic device according to claim 15, wherein the electronic elements are EL electronic elements.

17. A method of driving an electronic device comprising a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, the method comprising the steps of:

selecting one scanning line from the plurality of scanning lines in order to apply a data signal to a first unit circuit among the plurality of unit circuits;

selecting a scanning line which is not adjacent to the one scanning line which is selected to apply the data signal to the first unit circuit in order to apply the data signal to a second unit circuit other than the first unit circuit; and

supplying a reset control signal to a third unit circuit other than the first unit circuit and the second unit circuit in order to reset the electronic elements which are included in the third unit circuit during the time interval from the time that the data signal is applied to the first unit circuit to the time that the data signal is applied to the second unit circuit.

18. A method of driving an electronic device comprising a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, the method comprising the steps of:

selecting one scanning line from the plurality of scanning lines, and supplying data signals from the corresponding data lines to each of the unit circuits corresponding to the selected scanning line; and

supplying reset control signals to unit circuits which are disposed to correspond to at least one scanning line among scanning lines other than the scanning lines adjacent to the selected scanning line in order to reset the electronic elements which are included in the unit circuits to predetermined states.

19. A method of driving an electronic device comprising a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, the method comprising the steps of:

selecting one scanning line from the plurality of scanning lines, and supplying data signals from the corresponding data lines to each of the unit circuits corresponding to the selected scanning line; and

selecting at least one scanning line among the scanning lines other than the selected scanning line, and supplying reset control signals to unit circuits corresponding to the at least one selected scanning line through corresponding data lines of the plurality of data lines in order to reset the electronic elements to predetermined states.

20. A method of driving an electronic device comprising a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, the method comprising a step of supplying reset control signals to at least one unit circuit among the plurality of unit circuits in order to reset the electronic elements to predetermined states during the time interval from the time that writing of data signals to the unit circuits starts to the time that subsequent writing of data signals to the unit circuits starts.

21. A method of driving an electronic device comprising a plurality of unit circuits disposed corresponding to intersections of a plurality of scanning lines and a plurality of data lines, each unit circuit comprising electronic elements, the method comprising the step of:

supplying, during the time interval from the time that writing of data signal to a unit circuit starts to the time that subsequent writing of data signals to the unit circuit starts, reset control signals to at least one unit circuit other than the unit circuit among the plurality of unit circuits in order to reset the electronic elements to predetermined states.