Device, television system, and electronic device

• US 10,559,249 B2
• Filed: 12/21/2016
• Issued: 02/11/2020
• Est. Priority Date: 12/28/2015
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Yoneda, Seiichi
• Primary Examiner(s): Butcher, Brian M
• Application Number:
  US15/386,947
• Publication Number:
  US 20170186365A1
• Time in Patent Office: 1,147 Days
• Field of Search: None
• 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 2300/0408 Integration of the drivers onto the display substrate
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2310/04 Partial updating of the display screen
• CPC Class Codes: G09G 2320/103 Detection of image changes, e.g. determination of an index representative of the image change
• CPC Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 3/2096 Details of the interface to the display terminal specific for a flat panel suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: H04N 19/10 using adaptive coding
• CPC Class Codes: H04N 19/423 characterised by memory arrangements H04N19/433 takes precedence
• CPC Class Codes: H04N 19/44 Decoders specially adapted therefor, e.g. video decoders which are asymmetric with respect to the encoder
• CPC Class Codes: H04N 19/513 Processing of motion vectors
• CPC Class Codes: H04N 19/65 using error resilience
• CPC Class Codes: H04N 5/44 Receiver circuitry for the reception of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 5/63 Generation or supply of power specially adapted for television receivers

Abstract

To provide a novel device, a device with low power consumption, or a versatile device, the device includes a decoder, a driver circuit, and a display portion. The driver circuit includes a plurality of circuits. The display portion includes a plurality of display panels. The decoder has a function of generating a signal corresponding to an image displayed on the display portion. The decoder has a function of determining the necessity of rewriting an image of each of the display panels by detecting a change in the image of each of the display panels. The circuit has a function of outputting a signal to a display panel for which that image rewriting is determined to be necessary. The circuit has a function of stopping output of a signal to a display panel for which image rewriting is determined to be unnecessary.

Claims

1. A device comprising:

a decoder;

a driver circuit; and

a display portion comprising a first display panel and a second display panel,

wherein the decoder is configured to generate a signal corresponding to an image displayed on the display portion,

wherein the decoder is further configured to detect a change in an image in each of the first display panel and the second display panel, and determine whether or not image rewriting is necessary in each of the first display panel and the second display panel,

wherein the decoder is further configured to perform the determination on the basis of a value of a motion vector of the image displayed on the first display panel and a prediction error of an inter-frame prediction of the image displayed on the first display panel,

wherein the driver circuit is configured to output the signal to the first display panel when image rewriting is determined to be necessary for the first display panel, and

wherein the driver circuit is further configured to stop output of the signal to the first display panel when image rewriting is determined to be unnecessary for the first display panel.

2. The device according to claim 1,

wherein each of the first display panel and the second display panel comprises a pixel,

wherein the pixel comprises a transistor and a display element,

wherein one of a source and a drain of the transistor is electrically connected to a wiring,

wherein the other of the source and the drain of the transistor is electrically connected to the display element,

wherein the wiring is configured to transmit a potential corresponding to a gray level displayed in the pixel, and

wherein the transistor comprises an oxide semiconductor in a channel formation region.

3. The device according to claim 1, wherein the driver circuit is positioned inside the display portion.

4. A television system comprising the device according to claim 1, wherein the television system is configured to receive a broadcast signal to generate bitstream data and display an image on the basis of the bitstream data.

5. An electronic device comprising:

the device according to claim 1; and

any one of a microphone, a speaker, an operation switch and a sensor.

6. A device comprising:

a decoder;

a driver circuit; and

a display portion comprising a first display panel and a second display panel,

wherein the decoder is configured to generate a first signal corresponding to an image displayed on the display portion,

wherein the decoder is further configured to detect a change in an image in each of the first display panel and the second display panel, and determine whether or not image rewriting is necessary in each of the first display panel and the second display panel,

wherein the decoder is further configured to perform the determination on the basis of a value of a motion vector of the image displayed on the first display panel and a prediction error of an inter-frame prediction of the image displayed on the first display panel,

wherein the driver circuit is configured to output the first signal to the first display panel when image rewriting is determined to be necessary for the first display panel,

wherein the driver circuit is further configured to stop output of the first signal to the first display panel when image rewriting is determined to be unnecessary for the first display panel, and

wherein the decoder is further configured to generate a second signal to synchronize output of signals from the driver circuit to the display portion.

7. The device according to claim 6,

wherein each of the first display panel and the second display panel comprises a pixel,

wherein the pixel comprises a transistor and a display element,

wherein one of a source and a drain of the transistor is electrically connected to a wiring,

wherein the other of the source and the drain of the transistor is electrically connected to the display element,

wherein the wiring is configured to transmit a potential corresponding to a gray level displayed in the pixel, and

wherein the transistor comprises an oxide semiconductor in a channel formation region.

8. The device according to claim 6, wherein the driver circuit is positioned inside the display portion.

9. A television system comprising the device according to claim 6, wherein the television system is configured to receive a broadcast signal to generate bitstream data and display an image on the basis of the bitstream data.

10. An electronic device comprising:

the device according to claim 6; and

any one of a microphone, a speaker, an operation switch and a sensor.

11. A device comprising:

a decoder;

a driver circuit; and

a display portion comprising a first display panel and a second display panel,

wherein the decoder is configured to generate a signal corresponding to an image displayed on the display portion,

wherein the decoder is further configured to detect a change in an image in each of the first display panel and the second display panel, and determine whether or not image rewriting is necessary in each of the first display panel and the second display panel, and

wherein the decoder is further configured to perform the determination on the basis of a value of a motion vector of the image displayed on the first display panel and a prediction error of an inter-frame prediction of the image displayed on the first display panel.

12. The device according to claim 11, wherein each of the first display panel and the second display panel comprises a plurality of pixels.

13. The device according to claim 11,

wherein each of the first display panel and the second display panel comprises a pixel,

wherein the pixel comprises a transistor and a display element,

wherein one of a source and a drain of the transistor is electrically connected to a wiring,

wherein the other of the source and the drain of the transistor is electrically connected to the display element,

wherein the wiring is configured to transmit a potential corresponding to a gray level displayed in the pixel, and

wherein the transistor comprises an oxide semiconductor in a channel formation region.

14. The device according to claim 11, wherein the driver circuit is positioned inside the display portion.

15. A television system comprising the device according to claim 11, wherein the television system is configured to receive a broadcast signal to generate bitstream data and display an image on the basis of the bitstream data.

16. An electronic device comprising:

the device according to claim 11; and

any one of a microphone, a speaker, an operation switch and a sensor.