Object determining method and touch control apparatus

Patent metadata

Field	Value
Publication number	US-2016132172-A1
Application number	US-201514816054-A
Country	US
Kind code	A1
Filing date	Aug 2, 2015
Priority date	Nov 12, 2014
Publication date	May 12, 2016
Grant date	—

Abstract

An object state determining method, for determining a state for an object on a sensing surface of a touch control apparatus, comprising: (a) computing a sensing length according at least one touch sensing amount that the object causes to the sensing surface; (b) determining an object state of the object according to an arrangement of the sensing length. A touch control apparatus applying the object state determining method is also disclosed.

First claim

What is claimed is:

1 . An object state determining method, for determining a state for an object with respected to a touch sensing surface of a touch control apparatus, comprising:
(a) computing a sensing length according to at least one touch sensing amount that the object causes to the sensing surface; (b) separating at least part of the sensing length to a front part region and a middle part region; (c) computing a front part touch sensing amount for the front part region; (d) computing a middle part touch sensing amount for the middle part region; and (e) determining an object state of the object according to the front part touch sensing amount and the middle part touch sensing amount.

2 . The object state determining method of claim 1 , wherein the step (e) comprises determining the object state of the object according to a touch sensing amount ratio between the front part touch sensing amount and the middle part touch sensing amount.

3 . The object state determining method of claim 2 , wherein the step (e) comprises:
if the touch sensing amount ratio is larger than a state threshold value, determining the object is in a non touch control state with respect to the sensing surface; and if the touch sensing amount ratio is smaller than the state threshold value, determining the object is in a touch control state with respect to the sensing surface.

4 . The object state determining method of claim 3 , further comprising:
if it is determined that the object is in a non touch control state with respect to the sensing surface, ignoring any touch control operation that the object performs to the sensing surface in a predetermined time period for a timing that the object is determined in a non touch control state with respect to the sensing surface.

5 . The object state determining method of claim 1 , wherein the object is a finger, the front part comprises a fingertip, the middle part comprises at least part for finger sections which are not the fingertip.

6 . The object state determining method of claim 1 , wherein the touch control apparatus is a capacitance type touch control apparatus, wherein the touch sensing amount, the front part touch sensing amount and the middle part touch sensing amount are capacitance variation values, wherein the front part touch sensing amount comprises at least one assemble for capacitance sensing amounts, and the middle part touch sensing amount comprises at least one assemble for capacitance sensing amounts.

7 . The object state determining method of claim 1 , wherein the touch control apparatus is an optical touch control apparatus, wherein the front part touch sensing amount, the middle part touch sensing amount and the rear part touch sensing amount are brightness values.

8 . The object state determining method of claim 1 , wherein the step (b) comprises:
if the sensing length is h, setting xh length in most front part of the sensing length as the front part region, and setting yh length after the front part region as the middle part region, wherein the x and the y are arithmetic numbers smaller than 1, wherein a summation of the x plus the y is smaller than or equals 1.

9 . An object state determining method, for determining a state for an object with respected to a touch sensing surface of a touch control apparatus, comprising:
(a) computing a sensing length according to at least one touch sensing amount that the object causes to the sensing surface; (b) determining an object state of the object according to a relation between the sensing length and a state threshold length.

10 . The object state determining method of claim 9 , wherein the step (b) comprises:
if the sensing length is larger than the state threshold length, determining the object is in a non touch control state with respect to the sensing surface; and if the sensing length is smaller than the state threshold length, determining the object is in a touch control state with respect to the sensing surface.

11 . The object state determining method of claim 10 , further comprising:
if it is determined that the object is in a non touch control state with respect to the sensing surface, ignoring any touch control operation that the object performs to the sensing surface in a predetermined time period for a timing that the object is determined in a non touch control state with respect to the sensing surface.

12 . The object state determining method of claim 9 , wherein the object is a finger.

13 . The object state determining method of claim 9 , wherein the touch control apparatus is a capacitance type touch control apparatus, wherein the touch sensing amount are capacitance variation values, wherein the touch sensing amount comprises at least one assemble for capacitance sensing amounts.

14 . The object state determining method of claim 9 , wherein the touch control apparatus is an optical touch control apparatus, and the touch sensing amount is a brightness value.

15 . An object state determining method, for determining a state for an object with respected to a touch sensing surface of a touch control apparatus, comprising:
(a) computing a first object region according to at least one first touch sensing amount that the object causes to the sensing surface; (b) computing a second object region according to at least one second touch sensing amount that the object causes to the sensing surface; (c) computing an object moving direction according to locations of the first object region and the second object region; and (d) determining an object state according to a relation between a size of the first object region, a size of the second object region, and the object moving direction.

16 . The object state determining method of claim 15 , wherein the step (d) comprises: determining if the object is in a touch state or in a non touch state with respect to the touch sensing surface, according to a relation between the first object region, the second object region, and the object moving direction.

17 . The object state determining method of claim 16 , wherein if the first object region is generated earlier than the second object region, if the first object region is larger than the second object region, and if the object moving direction is toward a front end of the touch control apparatus, determining the object is in a non touch control state.

18 . The object state determining method of claim 16 , wherein if the first object region is generated earlier than the second object region, if the first object region is smaller than the second object region, and if the object moving direction is toward a rear end of the touch control apparatus, determining the object is in a non touch control state.

19 . The object state determining method of claim 16 , further comprising:
if it is determined that the object is in a non touch control state with respect to the sensing surface, ignoring any touch control operation that the object performs to the sensing surface in a predetermined time period for a timing that the object is determined in a non touch control state with respect to the sensing surface.

20 . The object state determining method of claim 16 , wherein the object is a finger.

21 . The object state determining method of claim 20 , wherein the object moving direction is toward a fingertip.

22 . The object state determining method of claim 20 , wherein the object moving direction is toward a wrist.

23 . The

Assignees

• Pixart Imaging Inc

Inventors

• Su Tse-Chung
• Liao Chi-Chieh

Classifications

• G06F2203/04104

  Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger · CPC title

• G06F3/0416 Primary

  Control or interface arrangements specially adapted for digitisers · CPC title

• G06F3/03547 Primary

  Touch pads, in which fingers can move on a surface · CPC title

• G06F3/042

  by opto-electronic means · CPC title

• G06F3/044

  by capacitive means · CPC title