US 11,455,050 B2Granted

Display device, display module, and electronic device

AssigneeSemiconductor Energy Laboratory Co., Ltd.

InventorsHidenori Mori, Takahiro Fukutome

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Abstract

A display device with improved display quality and reduced power consumption is provided. The display device includes a gate driver, a display portion, and a selection signal output circuit. The display portion includes pixel circuits and scan lines. Each of the pixel circuits includes a display element. The gate driver is electrically connected to the scan lines. The first scan lines are electrically connected to the pixel circuits. The scan lines are each configured to receive a first scan signal. The selection signal output circuit is configured to output a first selection signal. The first selection signal is configured to supply the first scan signal to a selected scan line. The display element is configured to update display by the first scan signal. In the pixel circuits, one display element displays an image updated with a different update frequency from another display element.

Claims20

Dependent claims

A display device comprising:

a signal line;
a first scan line;
a second scan line;
a first pixel circuit;
and
a second pixel circuit,
wherein:
the signal line is configured to supply a first grayscale signal to the first pixel circuit and a second grayscale signal to the second pixel circuit,
the first pixel circuit comprises a first display element exhibiting a first grayscale level,
the second pixel circuit comprises a second display element exhibiting a second grayscale level,
the first display element is updated entirely during one frame,
the second display element is updated partly during one frame,
the first scan line is configured to output a first voltage and a second voltage to the first pixel circuit,
the second voltage is lower than the first voltage,
the second scan line is configured to output a third voltage and a fourth voltage to the second pixel circuit,
the fourth voltage is lower than the third voltage,
a first maximum voltage generated by the first grayscale signal is lower than the first voltage,
a first minimum voltage generated by the first grayscale signal is higher than the second voltage,
a second maximum voltage generated by the second grayscale signal is lower than the third voltage,
a second minimum voltage generated by the second grayscale signal is higher than the fourth voltage,
the first maximum voltage is higher than the second maximum voltage, and
the first minimum voltage is lower than the second minimum voltage.

19 more elements

A display device comprising:

a display portion comprising a first region and a second region;
and
a circuit configured to output a first scan signal, a second scan signal, a third scan signal, and a fourth scan signal;
and
the first region comprising:
a first pixel circuit and a first scan line electrically connected to each other;
and
a third pixel circuit and a third scan line electrically connected to each other, the second region comprising:
a second pixel circuit and a second scan line electrically connected to each other;
and
a fourth pixel circuit and a fourth scan line electrically connected to each other,
wherein:
the second scan line is a scan line next to the first scan line,
the third scan line is a scan line next to the second scan line,
the fourth scan line is a scan line next to the third scan line,
the first pixel circuit comprises a first display element,
the second pixel circuit comprises a second display element,
the third pixel circuit comprises a third display element,
the fourth pixel circuit comprises a fourth display element,
the first scan line is configured to receive the first scan signal,
the second scan line is configured to receive the second scan signal,
the third scan line is configured to receive the third scan signal,
the fourth scan line is configured to receive the fourth scan signal,
the first scan line is configured to output a first voltage and a second voltage to the first pixel circuit,
the third scan line is configured to output the first voltage and the second voltage to the first pixel circuit,
the second voltage is lower than the first voltage,
the second scan line is configured to output a third voltage and a fourth voltage to the second pixel circuit,
the fourth scan line is configured to output the third voltage and the fourth voltage to the fourth pixel circuit,
the fourth voltage is lower than the third voltage,
the third voltage is lower than the first voltage,
the first display element and the second display element overlap each other,
the third display element and the fourth display element overlap each other,
the first display element and the fourth display element are configured to update display in one of a first frame period and a second frame period, and
the second display element and the third display element are configured to update display in the other of the first frame period and the second frame period.

31 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/733,538Filed 3 Jan 2020 · continuation
Priority: JP 2016-0749564 Apr 2016
Published: US 2020/0150808 A114 May 2020
Granted: 27 Sep 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G06F 3/0412
Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means: digitisers structurally integrated in a display
G06F 3/0446
By capacitive means: using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
G02F 1/133553
Structural association of cells with optical devices, e.g. polarisers or reflectors: reflecting elements
G06F 3/04166
Control or interface arrangements specially adapted for digitisers: details of scanning methods, e.g. sampling time, grouping of sub areas or time…

Family

Application15/472,490Parent of this continuation · filed 29 Mar 2017
US 2020/0150808 A1Pre-grant publication · published 14 May 2020
US 10,528,165 B2Parent of this continuation
US 2017/0285817 A1Published application
US 11,455,050 B2This patent

From the US filing history. Foreign family members aren’t listed.