INPUT-OUTPUT DEVICE AND DRIVING METHOD OF INPUT-OUTPUT DEVICE

• US 20120044223A1
• Filed: 08/09/2011
• Published: 02/23/2012
• Est. Priority Date: 08/19/2010
• Status: Abandoned Application

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: TAMURA, Hikaru
• Application Number:
  US13/205,670
• Publication Number:
  US 20120044223A1
• Time in Patent Office: Days
• US Class Current: 345/207
• CPC Class Codes: G02F 1/13312 Circuits comprising photodetectors for purposes other than feedback
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G06F 3/042 by opto-electronic means
• CPC Class Codes: G06F 3/04883 for inputting data by handwriting, e.g. gesture or text

Abstract

It is an object to increase applications. The present invention shows a driving method of an input-output device which provided with an input-output portion including a pixel portion, and a data processing portion including an image processing circuit, a memory circuit storing a plurality of programs, and a CPU. The pixel portion includes display circuits and photodetector circuits. To the display circuits, a display selection signal is input and a display data signal is input in accordance with the display selection signal. The display circuits become a display state in accordance with a datum of the display data signal which is input. The photodetector circuits generate an optical datum corresponding to an illuminance of incident light. In the method, optical data are stored in the memory circuit, the optical data are read as an image datum from the memory circuit by the image processing circuit sequentially, a label is imprinted on an optical datum with a value larger than a value of a reference datum, optical data on each of which the label of the same group is imprinted is counted, and the process performed by a CPU is changed in accordance with the result of count.

Claims

1. An input-output device comprising:

an input-output portion including a pixel portion including;

a display circuit to which a display selection signal is input, to which a display data signal is input in accordance with the display selection signal, and which become a display state in accordance with the display data signal; and

a photodetector circuit which generates an optical datum corresponding to an illuminance of incident light, and

a data processing portion including,

an image processing circuit including a labeling processing circuit in which a label is imprinted on the optical datum with a value larger than a reference datum, a count circuit which counts a number of optical data on each of which the label of the same group is imprinted, and a comparator which compares a count value of the optical data on each of which the label of the same group is imprinted and both a first reference count value and a second reference count value;

a memory circuit in which the optical data are sequentially stored and a plurality of programs are stored; and

a CPU which controls whether one or more of the plurality of programs is performed in accordance with a result of the comparator.

2. The input-output device according to the claim 1, wherein the input-output portion includes a field-effect transistor.

3. The input-output device according to the claim 1, wherein the input-output device is provided in one selected from the group consisting of a mobile information terminal, a folding mobile information terminal, and a stationary information terminal.

4. A driving method of an input-output device comprising:

an input-output portion which includes a pixel portion including;

a display circuit to which a display selection signal is input, to which a display data signal is input in accordance with the display selection signal, and which become a display state in accordance with the display data signal; and

a photodetector circuit which generates an optical datum corresponding to an illuminance of incident light, and

a data processing portion including an image processing circuit, a memory circuit in which a plurality of programs are stored, and a CPU,

the driving method comprising steps of;

storing optical data in the memory circuit sequentially;

reading the optical data sequentially from the memory circuit by the image processing circuit;

imprinting a label on the optical datum with a value larger than a reference datum; and

counting a number of optical data on each of which the label of the same group is imprinted,

wherein in a case of a count value of the optical data each on each of which the label of the same group is imprinted is larger than or equal to a first reference count value and smaller than or equal to a second reference count value, a coordinate of a center of a region in the pixel portion, provided with the photodetector circuit in which the optical data on each of which the label of the same group is imprinted is generated, is calculated by the image processing circuit;

the coordinate of the center is output to the CPU; and

one or more of the plurality of programs are read from the memory circuit and are performed by the CPU in accordance with the coordinate of the center, and

wherein in a case of the count value of the optical data on each of which the label of the same group is imprinted is larger than the second reference count value, in the region of the pixel portion, provided with the photodetector circuit in which the optical data on each of which the label of the same group is imprinted, one or more of the plurality of programs are read from the memory circuit and are performed by the CPU.

5. The driving method of the input-output device according to claim 4, wherein in the case where the count value of the optical data on each of which the label of the same group is imprinted is larger than the second reference count value, an image signal is generated using the optical data on each of which the label of the same group is imprinted, the display data signal is generated based on the image signal, and the display data signal which is generated is sequentially output to the display circuit.

6. The driving method of the input-output device according to claim 4, wherein the input-output portion includes a field-effect transistor.

7. The driving method of the input-output device according to claim 4, wherein the input-output device is provided in one selected from the group consisting of a mobile information terminal, a folding mobile information terminal, and a stationary information terminal.