DISPLAY DEVICE, DISPLAY METHOD, AND ELECTRONIC DEVICE

• US 20130241814A1
• Filed: 02/21/2013
• Published: 09/19/2013
• Est. Priority Date: 03/15/2012
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Japan Display West Incorporated (Japan Display Incorporated)
• Inventors: Hirabayashi, Yukiya, Shimizu, Koji, Ozawa, Yutaka
• Granted Patent: US 9,495,922 B2
• Time in Patent Office: Days
• US Class Current: 345/100
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G09G 2310/0286 Details of a shift registers arranged for use in a driving circuit
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

Disclosed herein is a display device including: a display section configured to have a plurality of scanning signal lines to which respective scanning signals are applied, the display section performing line-sequential scanning by repeating interruption and resumption of the line-sequential scanning on a basis of the plurality of scanning signals, and displaying an image; and a scanning section configured to generate the plurality of scanning signals such that transition times on a pulse termination side of the respective scanning signals are equal to each other.

Claims

1. A display device comprising:

a display section configured to have a plurality of scanning signal lines to which respective scanning signals are applied, the display section performing line-sequential scanning by repeating interruption and resumption of the line-sequential scanning on a basis of the plurality of scanning signals, and displaying an image; and

a scanning section configured to generate the plurality of scanning signals such that transition times on a pulse termination side of the respective scanning signals are equal to each other.

2. The display device according to claim 1,

wherein the scanning section has a shift register,

the shift register has first transfer blocks including first transfer circuits in a plurality of stages and second transfer blocks, the first transfer blocks and the second transfer blocks being connected alternately in a scanning direction, and

the plurality of scanning signal lines are associated with the respective first transfer circuits in the plurality of stages included in the plurality of first transfer blocks.

3. The display device according to claim 2,

wherein transfer operation in the second transfer blocks is delayed, whereby the display section interrupts the line-sequential scanning.

4. The display device according to claim 3,

wherein the display section performs line-sequential scanning in each frame, and

a transfer operation in one frame and a transfer operation in another frame are delayed in respective different second transfer blocks.

5. The display device according to claim 2,

wherein the second transfer blocks each have second transfer circuits in a plurality of stages, and

transfer operation in at least one of the second transfer circuits in the plurality of stages is delayed.

6. The display device according to claim 5,

wherein transfer operation in at least one of the second transfer circuits in the plurality of stages other than a last stage is delayed.

7. The display device according to claim 5,

wherein the second transfer circuits have a same circuit configuration as the first transfer circuits.

8. The display device according to claim 2,

wherein the second transfer blocks each have one second transfer circuit.

9. The display device according to claim 2,

wherein the shift register performs transfer operation on a basis of a transfer clock,

the scanning section further includes a control section configured to control the shift register by the transfer clock, and

the control section delays transfer operation in the second transfer blocks by lengthening at least one of a clock pulse width and a clock pulse interval of the transfer clock.

10. The display device according to claim 2,

wherein the shift register performs transfer operation on a basis of a transfer clock,

the scanning section further includes a control section configured to control the shift register by the transfer clock, and

a clock pulse width and a clock pulse interval of the transfer clock are fixed.

11. The display device according to claim 2,

wherein the second transfer blocks each have a second transfer circuit in one stage or second transfer circuits in a plurality of stages, and

the scanning section has a load circuit connected to each of the second transfer circuits.

12. The display device according to claim 2,

wherein the scanning section further includes a first buffer circuit for generating the scanning signals on a basis of an output signal of each of the first transfer circuits.

13. The display device according to claim 12,

wherein the second transfer blocks each have a second transfer circuit in one stage or second transfer circuits in a plurality of stages, and

the scanning section further includes a second buffer circuit supplied with an output signal of each of the second transfer circuits.

14. The display device according to claim 2,

wherein the shift register is formed using transistors of a single conductivity type.

15. The display device according to claim 1,

wherein the scanning section includes

a shift register for performing transfer operation on a basis of a transfer clock, and

a control section configured to control the shift register by the transfer clock, and

the control section is configured to be able to change amplitude of the transfer clock.

16. The display device according to claim 15,

wherein the control section lengthens at least one of a clock pulse width and a clock pulse interval of the transfer clock, whereby the display section interrupts the line-sequential scanning.

17. The display device according to claim 15,

wherein after lengthening clock pulse width of one or a plurality of clock pulses of the transfer clock, the control section returns the clock pulse width of the transfer clock to an original clock pulse width and increases amplitude of the transfer clock.

18. The display device according to claim 1, further comprising

a touch panel,

wherein the touch panel detects an external adjacent object in a period of the interruption of the line-sequential scanning in the display section.

19. A display method comprising:

generating a plurality of scanning signals such that transition times on a pulse termination side of the respective scanning signals are equal to each other, and applying the plurality of scanning signals to a plurality of scanning signal lines; and

performing line-sequential scanning by repeating interruption and resumption of the line-sequential scanning on a basis of the plurality of scanning signals, and displaying an image.

20. An electronic device comprising:

a display device; and

a control section configured to perform operation control using the display device;

the display device including

a display section configured to have a plurality of scanning signal lines to which respective scanning signals are applied, the display section performing line-sequential scanning by repeating interruption and resumption of the line-sequential scanning on a basis of the plurality of scanning signals, and displaying an image, and

a scanning section configured to generate the plurality of scanning signals such that transition times on a pulse termination side of the respective scanning signals are equal to each other.