TOUCH MODULE, ELECTRONIC DEVICE INCLUDING THE SAME, AND OPERATION METHOD THEREOF

• US 20160253041A1
• Filed: 02/26/2016
• Published: 09/01/2016
• Est. Priority Date: 02/27/2015
• Status: Abandoned Application

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: PARK, Jong Dae, LEE, Heon Seok, HEO, Hoon Do
• Application Number:
  US15/054,946
• Publication Number:
  US 20160253041A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04106 Multi-sensing digitiser, i.e. digitiser using at least two different sensing technologies simultaneously or alternatively, e.g. for detecting pen and finger, for saving power or for improving position detection
• CPC Class Codes: G06F 2203/04108 Touchless 2D- digitiser, i.e. digitiser detecting the X/Y position of the input means, finger or stylus, also when it does not touch, but is proximate to the digitiser's interaction surface without distance measurement in the Z direction
• CPC Class Codes: G06F 3/04186 Touch location disambiguation
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

An electronic device including a touch module is provided. The electronic device may include an external housing including a transparent plate forming a front surface of the electronic device; a display panel, at least part of which is exposed through the transparent plate; a touch panel adjacent the display panel; a memory; and a processor operably coupled to the memory. The memory may store instructions which, when executed by the processor, cause the processor to: receive first data including an input sensed by a first sensor of a first type through the touch panel, and receive second data including an input sensed by a second sensor of a second type through the touch panel. The processor may compare the first data with the second data to generate a comparison result, and determine whether an object detected using at least one of the first or second sensors is a foreign object in direct contact with the transparent plate, based on at least part of the comparison result.

Claims

1. An electronic device, comprising:

an external housing including a transparent plate forming a front surface of the electronic device;

a display panel, at least part of which is exposed through the transparent plate;

a touch panel adjacent the display panel;

a memory; and

a processor operably coupled to the memory,

wherein the memory stores instructions which, when executed by the processor, causes the processor to;

receive first data including an input sensed by a first sensor of a first type through the touch panel, and receive second data including an input sensed by a second sensor of a second type through the touch panel,

compare the first data with the second data to generate a comparison result, and

determine whether an object detected using at least one of the first or second sensors is a foreign object in direct contact with the transparent plate, based on at least part of the comparison result.

2. The electronic device of claim 1, wherein the first sensor is a mutual-capacitance type sensor and the second sensor is a self-capacitance type sensor.

3. The electronic device of claim 2, wherein the mutual-capacitance type sensor is designated for detecting direct touch inputs and the self-capacitance type sensor is designated for detecting hovering inputs.

4. The electronic device of claim 1, wherein the foreign object is a fluidic object.

5. The electronic device of claim 1, wherein the touch panel comprises:

first conductive lines extending in a first direction; and

second conductive lines extending in a second direction orthogonal to the first direction and intersecting the first conductive lines,

wherein the first conductive lines and the second conductive lines each form a part of the first sensor and the second sensor,

wherein the instructions are set such that the processor sequentially or simultaneously provides a first signal to the first conductive lines and senses a change of the first signal in the second conductive lines, in the first sensor, and

wherein the instructions are set such that the processor sequentially or simultaneously provides a second signal to each of the first conductive lines and the second conductive lines and senses a change of the second signal, in the second sensor.

6. The electronic device of claim 1, wherein the instructions are set such that the processor determines that the object is in direct contact with the transparent plate, if an input sensed by the first sensor has a value above a first threshold and if an input sensed by the second sensor has a value above a second threshold,

such that the processor determines that the foreign object is in contact with the transparent plate, if the input sensed by the first sensor has the value above the first threshold and if the input sensed by the second sensor has a value below the second threshold,

such that the processor determines that a touch object hovers above the touch panel, if the input sensed by the first sensor has a value below the first threshold and if the input sensed by the second sensor has a value above the second threshold, or

such that the processor cancels detected nodes, having a sensing value in which the second data have values below the second threshold, among detected points having a sensing value in which the first data have values above the first threshold.

7. The electronic device of claim 1, wherein the instructions are set such that the processor performs sensing using the first sensor a first number of times during a constant period within a period of one frame and performs sensing according to the second sensor a second number of times during a constant period.

8. The electronic device of claim 1, wherein the instructions are set such that the processor alternately performs sensing with the first sensor associated with collecting the first data and sensing with the second sensor associated with collecting the second data during a constant period.

9. The electronic device of claim 1, wherein the instructions are set such that the processor repeatedly calculates a touch node during a period when every frame is displayed according to data collected after alternately performing sensing with the first sensor associated with the first data and sensing with the second sensor associated with collecting the second data.

10. The electronic device of claim 1, wherein the instructions are set such that the processor calculates a touch node according to data collected after performing sensing with the first sensor and sensing with the second sensor, which are performed in a substantially identical manner within a period when one frame is displayed.

11. The electronic device of claim 1, wherein the instructions are set such that the processor activates a pressure sensor and determines a valid touch node, if each of regions of first data with values above a first threshold and second data with values below a second threshold has a predetermined size or more, or such that the processor activates the pressure sensor and determines a valid touch node, if a constant region of first data above the first threshold and a constant region of second data below the second threshold are a predetermined number or more of regions.

12. The electronic device of claim 1, wherein the instructions are set such that the processor activates a pressure sensor and determines a valid touch node, if second data among first data above a first threshold has a value below a second threshold and thereafter has a value above the second threshold at a specific time.

13. The electronic device of claim 1, wherein the memory stores a normal touch sensing value distribution table generated according to the first data and the second data in a state where the foreign object is not in contact with the transparent plate.

14. The electronic device of claim 13, wherein the instructions are set such that the processor determines whether the foreign object is in contact with the transparent plate according to the normal touch sensing value distribution table in a process of initializing a touch module.

15. The electronic device of claim 1, wherein the instructions are set such that the processor determines a corresponding node as a foreign object contact region, if a change of touch capacitance at a node of data having a sensing value of a constant level or more among collected data is within a range during a prescribed time.

16. A method for operating an electronic device, the method comprising:

receiving first data including an input sensed by a first sensor of a first type through a touch panel;

receiving second data including an input sensed by a second sensor of a second type through the touch panel;

comparing the first data with the second data to generate a comparison result; and

determining whether an object detected using at least one of the first or second sensors is a foreign object in direct contact with a front surface of the electronic device, based on at least part of the comparison result.

17. The method of claim 16, wherein the receiving of the first data comprises:

sequentially or simultaneously providing a signal to first conductive lines and sensing a change of the signal in second conductive lines, in the touch panel including the first conducive lines extended in the first direction and the second conductive lines, and

wherein the receiving of the second data comprises;

sequentially or simultaneously providing a signal to each of the first conductive lines and the second conductive lines and sensing a change of the provided signal.

18. The method of claim 17, wherein the determining comprises:

one of determining that the object is in direct contact with the front surface, if an input sensed by the first sensor has a value above a first threshold and if an input sensed by the second sensor has a value above a second threshold,

determining that the foreign object is in contact with the front surface, if the input sensed by the first sensor has a value above the first threshold and if the input sensed by the second sensor is below the second threshold, and

determining that a touch object hovers above the front surface, if the input sensed by the first sensor is below the first threshold and if the input sensed by the second sensor is above the second threshold.

19. The method of claim 16, further comprising:

collecting first data and second data from a touch module within a period of one frame displayed on a display panel,

wherein the determining comprises;

determining a region, where first data of a first reference value or more and second data of a second reference value or more are overlapped and detected, as a valid touch region according to the collected first data and the collected second data.

20. A touch module, comprising:

a touch panel;

a buffer; and

a touch control module configured to electrically connect with the buffer and the touch panel,

wherein the buffer stores instructions set such that the touch control module receives first data including an input sensed by a first sensor of a first type through the touch panel, receives second data including an input sensed by a second sensor of a second type through the touch panel, compares the first data with the second data to generate a comparison result, and determines whether an object is in direct contact with the touch panel, whether the object is proximate the touch panel within a prescribed distance thereof or is not in contact with the touch panel, or whether fluids are in contact with the touch panel, based on at least part of the comparison result.