Display panel, information processing device, and driving method of display panel

• US 10,073,551 B2
• Filed: 08/02/2016
• Issued: 09/11/2018
• Est. Priority Date: 08/07/2015
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Kubota, Daisuke, Toyotaka, Kouhei
• Primary Examiner(s): Sharifi-Tafreshi, Koosha
• Application Number:
  US15/225,950
• Publication Number:
  US 20170039931A1
• Time in Patent Office: 770 Days
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2300/046 with an emissive area and a light-modulating area combined in one pixel
• CPC Class Codes: G09G 2310/06 Details of flat display driving waveforms
• CPC Class Codes: G09G 2330/023 using energy recovery or conservation
• CPC Class Codes: G09G 2354/00 Aspects of interface with display user
• CPC Class Codes: G09G 2360/144 the light being ambient light
• CPC Class Codes: G09G 3/3225 using an active matrix
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 5/363 Graphics controllers

Abstract

Provided is a novel display panel which is highly convenient or reliable or a driving method thereof. The display panel includes a first display element, a first conductive film electrically connected to the first display element, a second conductive film having a region overlapping with the first conductive film, an insulating film having a region sandwiched between the second conductive film and the first conductive film, a pixel circuit electrically connected to the second conductive film, and a second display element electrically connected to the pixel circuit. The insulating film has an opening. The second conductive film is electrically connected to the first conductive film in the opening.

Claims

1. An information processing device comprising:

a display panel comprising a signal line and a pixel;

an input/output device; and

an arithmetic device comprising an arithmetic portion and a memory portion,

wherein;

the pixel comprises;

a first display element;

a first conductive film electrically connected to the first display element;

a second conductive film overlapping with the first conductive film;

an insulating film between the first and second conductive films;

a pixel circuit electrically connected to the second conductive film and the signal line; and

a second display element electrically connected to the pixel circuit,

the second conductive film is electrically connected to the first conductive film in an opening provided in the insulating film,

the input/output device is configured to supply at least pressure information,

the memory portion is configured to store a program comprising a step of selecting a first mode when the pressure information exceeding a predetermined threshold is supplied, and a step of selecting a second mode when the pressure information exceeding the predetermined threshold is supplied no more than a predetermined period,

the arithmetic portion is configured to supply a first control signal in the first mode, and a second control signal in the second mode different from the first control signal,

the second control signal comprises at least a signal for refreshing display of the display panel, and

the second control signal is supplied in the second mode so that a frequency of refreshing the display of the display panel is lower than that in the first mode.

2. The information processing device according to claim 1, wherein the pixel circuit comprises a transistor having an oxide semiconductor layer.

3. The information processing device according to claim 1, wherein the second display element has a viewing angle overlapping with part of a viewing angle of the first display element.

4. The information processing device according to claim 1, wherein the second display element is configured to display an image in a first region surrounded by a second region in which the first display element displays an image.

5. The information processing device according to claim 1, wherein:

the first display element comprises a reflective film having an opening to reflect incident light, and

the second display element is configured to emit light toward the opening.

6. The information processing device according to claim 1, further comprising:

a first group of pixels arranged in a row direction;

a second group of pixels arranged in a column direction intersecting with the row direction; and

a scan line,

wherein;

the first group of pixels are electrically connected to the scan line,

the second group of pixels are electrically connected to the signal line, and

an opening of one pixel adjacent to the other pixel in the row direction or the column direction is provided in a position different from an opening of the other pixel.

7. An information processing device comprising:

an input/output device comprising;

a display portion for displaying image information;

an input portion for supplying positional information; and

a sensor portion for supplying pressure information; and

an arithmetic device comprising;

an arithmetic portion for supplying control information in accordance with the pressure information; and

a memory portion for storing a program comprising a step of selecting a first mode when the pressure information exceeding a predetermined threshold is supplied, and a step of selecting a second mode when the pressure information exceeding the predetermined threshold is supplied no more than a predetermined period,

wherein;

the display portion comprises first and second display elements electrically connected to and overlapping with each other,

the arithmetic portion is configured to supply a first control signal in the first mode, and a second control signal in the second mode different from the first control signal,

the second control signal comprises at least a signal for refreshing display of the display portion, and

the second control signal is supplied in the second mode so that a frequency of refreshing the display of the display portion is lower than that in the first mode.