U.S. patent application number 14/416581 was filed with the patent office on 2016-06-23 for touch panel and display device.
The applicant listed for this patent is SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.. Invention is credited to Chun Kai CHANG.
Application Number | 20160179267 14/416581 |
Document ID | / |
Family ID | 56100507 |
Filed Date | 2016-06-23 |
United States Patent
Application |
20160179267 |
Kind Code |
A1 |
CHANG; Chun Kai |
June 23, 2016 |
Touch Panel and Display Device
Abstract
A touch panel includes a plurality of sensing lines disposed in
a sensing area, a plurality of touch-controlling lines disposed in
a touch-detecting area, and an extended sensing line. The plurality
of sensing lines are used for generating sensing signals, and the
plurality of touch-controlling lines are used for receiving
touch-controlling signals. The plurality of touch-controlling lines
are extended to the sensing area to form mutual capacitances. The
sensing line stretches into the touch-detecting area as the
extended sensing line, forming a mutual capacitance in the
touch-detecting area. It decreases the dead areas effectively and
makes the positioning of touches more accurate.
Inventors: |
CHANG; Chun Kai; (Shenzhen,
Guangdong, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD. |
Shenzhen, Guangdong |
|
CN |
|
|
Family ID: |
56100507 |
Appl. No.: |
14/416581 |
Filed: |
December 26, 2014 |
PCT Filed: |
December 26, 2014 |
PCT NO: |
PCT/CN2014/095067 |
371 Date: |
January 22, 2015 |
Current U.S.
Class: |
345/174 |
Current CPC
Class: |
G06F 3/0443 20190501;
G06F 3/044 20130101; G06F 3/0416 20130101; G06F 2203/04103
20130101; G06F 2203/04112 20130101; G06F 2203/04104 20130101 |
International
Class: |
G06F 3/041 20060101
G06F003/041; G06F 3/044 20060101 G06F003/044 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 22, 2014 |
CN |
201410810747.3 |
Claims
1. A touch panel, comprising: a plurality of sensing lines,
disposed in a sensing area, for generating sensing signals; a
plurality of touch-controlling lines, disposed in a touch-detecting
area for, receiving touch-controlling signals, the plurality of
touch-controlling lines being extended to the sensing area to form
mutual capacitances; wherein the sensing line stretches into the
touch-detecting area as an extended sensing line, forming a mutual
capacitance in the touch-detecting area; wherein one end of the
extended sensing line is connected to one end of the sensing line;
a direction touch-controlling line, installed between the extended
sensing line and the touch-controlling line adjacent to the
extended sensing line, forming mutual capacitance with the extended
sensing line in the touch-detecting area, wherein each sensing line
comprises a plurality of horizontal portions and a plurality of
vertical portions perpendicular to the plurality of horizontal
portions, and one of the vertical portions is connected between two
of the horizontal portions to form a sensing area, so that one of
the touch-controlling lines extends in a position surrounding by
the sensing area.
2. The touch panel of claim 1, wherein the direction
touch-controlling line is a line extending along a column
direction.
3. The touch panel of claim 1, wherein the direction
touch-controlling line is in the same shape as the extended sensing
line.
4. A touch panel, comprising: a plurality of sensing lines,
disposed in a sensing area, for generating sensing signals; a
plurality of touch-controlling lines, disposed in a touch-detecting
area, for receiving touch-controlling signals, the plurality of
touch-controlling lines being extended to the sensing area to form
mutual capacitances; wherein the sensing line stretches into the
touch-detecting area as an extended sensing line, forming a mutual
capacitance in the touch-detecting area, wherein each sensing line
comprises a plurality of horizontal portions and a plurality of
vertical portions perpendicular to the plurality of horizontal
portions, and one of the vertical portions is connected between two
of the horizontal portions to form a sensing area, so that one of
the touch-controlling lines extends in a position surrounding by
the sensing area.
5. The touch panel of claim 4 further comprising a direction
touch-controlling line, installed between the extended sensing line
and the touch-controlling line adjacent to the extended sensing
line, forming mutual capacitance with the extended sensing line in
the touch-detecting area.
6. The touch panel of claim 4, wherein one end of the extended
sensing line is connected to one end of the sensing line.
7. The touch panel of claim 5, wherein the direction
touch-controlling line is a line extending along a column
direction.
8. The touch panel of claim 5, wherein the direction
touch-controlling line is in the same shape as the extended sensing
line.
9. A display device comprising a display panel and a touch panel
thereon, the touch panel comprising: a plurality of sensing lines,
disposed in a sensing area, for generating sensing signals; a
plurality of touch-controlling lines, disposed in a touch-detecting
area, for receiving touch-controlling signals, the plurality of
touch-controlling lines being extended to the sensing area to form
mutual capacitances; wherein the sensing line stretches into the
touch-detecting area as an extended sensing line, forming a mutual
capacitance in the touch-detecting area, wherein each sensing line
comprises a plurality of horizontal portions and a plurality of
vertical portions perpendicular to the plurality of horizontal
portions, and one of the vertical portions is connected between two
of the horizontal portions to form a sensing area, so that one of
the touch-controlling lines extends in a position surrounding by
the sensing area.
10. The display device of claim 9, wherein the touch panel further
comprises a direction touch-controlling line, installed between the
extended sensing line and the touch-controlling line adjacent to
the extended sensing line, forming mutual capacitance with the
extended sensing line in the touch-detecting area.
11. The display device of claim 9, wherein one end of the extended
sensing line is connected to one end of the sensing line.
12. The display device of claim 10, wherein the direction
touch-controlling line is a line extending along a column
direction.
13. The display device of claim 10, wherein the direction
touch-controlling line is in the same shape as the extended sensing
line.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention The present invention relates to
display technology, and more specifically, to a touch panel and
display device.
[0002] 2. Description of the Prior Art
[0003] As technology evolves, touchscreens are gradually becoming
more prevalent. A touchscreen comprises a touch panel overlapping a
display panel. The display panel is capable of various display
functions, whereas the touch panel is capable of identifying touch
gestures on the touchscreen. A touchscreen is formed by layering
the touch panel, comprising touch-controlling lines and sensing
lines, on top of the display panel.
[0004] Please refer to FIG. 1. On a conventional single-layer touch
panel, a sensing line 102 is between two touch-controlling lines
101, so to enable a single-layer multi-touch function.
[0005] The existing technology has, but not limited to, the
following problem: [0006] As shown in FIG. 1, given the fact that
indium tin oxide (ITO) in the conventional single-layer touch panel
has higher impedance, the touch-controlling line 101 cannot be
thin. In other words, the touch-controlling line 101 is wider, so
it accounts for a larger area of the single-layer touch panel. In
addition, because all sensing lines 102 are between two
touch-controlling lines 101, an effective touch-detecting area
shrinks and a dead area incapable of detecting touches (the dash
line rectangle) increases accordingly.
[0007] Therefore, a new technical solution is necessary to solve
the abovementioned technical problem.
SUMMARY OF THE INVENTION
[0008] An object of the present invention is to provide a touch
panel and a display device that is capable of decreasing the width
of dead areas effectively.
[0009] According to the present invention, a touch panel comprises:
a plurality of sensing lines, disposed in a sensing area, for
generating sensing signals; a plurality of touch-controlling lines,
disposed in a touch-detecting area for, receiving touch-controlling
signals, the plurality of touch-controlling lines being extended to
the sensing area to form mutual capacitances. The sensing line
stretches into the touch-detecting area as an extended sensing
line, forming a mutual capacitance in the touch-detecting area;
wherein one end of the extended sensing line is connected to one
end of the sensing line. The touch panel further comprises a
direction touch-controlling line, installed between the extended
sensing line and the touch-controlling line adjacent to the
extended sensing line, forming mutual capacitance with the extended
sensing line in the touch-detecting area.
[0010] In one aspect of the present invention, the direction
touch-controlling line is a line extending along a column
direction.
[0011] In another aspect of the present invention, the direction
touch-controlling line is in the same shape as the extended sensing
line.
[0012] According to the present invention, a touch panel comprises
a plurality of sensing lines and a plurality of touch-controlling
lines. The plurality of sensing lines are disposed in a sensing
area, and used for generating sensing signals. The plurality of
touch-controlling lines are disposed in a touch-detecting area, and
are used for receiving touch-controlling signals, the plurality of
touch-controlling lines being extended to the sensing area to form
mutual capacitances. The sensing line stretches into the
touch-detecting area as an extended sensing line, forming a mutual
capacitance in the touch-detecting area.
[0013] In one aspect of the present invention, the touch panel
further comprises a direction touch-controlling line, installed
between the extended sensing line and the touch-controlling line
adjacent to the extended sensing line, forming mutual capacitance
with the extended sensing line in the touch-detecting area.
[0014] In another aspect of the present invention, one end of the
extended sensing line is connected to one end of the sensing
line.
[0015] In still another aspect of the present invention, the
direction touch-controlling line is a line extending along a column
direction.
[0016] In yet another aspect of the present invention, the
direction touch-controlling line is in the same shape as the
extended sensing line.
[0017] According to the present invention, a display device
comprises a display panel and a touch panel thereon. The touch
panel comprises a plurality of sensing lines and a plurality of
touch-controlling lines. The plurality of sensing lines are
disposed in a sensing area, and used for generating sensing
signals. The plurality of touch-controlling lines are disposed in a
touch-detecting area, and are used for receiving touch-controlling
signals, the plurality of touch-controlling lines being extended to
the sensing area to form mutual capacitances. The sensing line
stretches into the touch-detecting area as an extended sensing
line, forming a mutual capacitance in the touch-detecting area.
[0018] In one aspect of the present invention, the touch panel
further comprises a direction touch-controlling line, installed
between the extended sensing line and the touch-controlling line
adjacent to the extended sensing line, forming mutual capacitance
with the extended sensing line in the touch-detecting area.
[0019] In another aspect of the present invention, one end of the
extended sensing line is connected to one end of the sensing
line.
[0020] In still another aspect of the present invention, the
direction touch-controlling line is a line extending along a column
direction.
[0021] In yet another aspect of the present invention, the
direction touch-controlling line is in the same shape as the
extended sensing line.
[0022] Comparing to the prior art, the present invention installs
an extended sensing line in a touch-detecting area (i.e. the dead
area), forming mutual capacitance in the touch-detecting area, thus
the dead area has mutual capacitance as well. It decreases the dead
areas effectively and makes the positioning of touches more
accurate.
[0023] These and other features, aspects and advantages of the
present disclosure will become understood with reference to the
following description, appended claims and accompanying
figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] FIG. 1 shows a schematic diagram of a conventional touch
panel.
[0025] FIG. 2A shows a schematic diagram of the touch panel
according to a first embodiment of the present invention.
[0026] FIG. 2B shows another diagram of the touch panel according
to a first embodiment of the present invention.
[0027] FIG. 3 shows a schematic diagram of the touch panel
according to a second embodiment of the present invention.
[0028] FIG. 4 shows a schematic diagram of the touch panel
according to a third embodiment of the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
[0029] The following descriptions for the respective embodiments
are specific embodiments capable of being implemented for
illustrations of the present invention, and should not be construed
as limiting the other specific embodiments of the present invention
which are not described herein. The terms "a" or "an", as used
herein, are defined as one or more than one.
[0030] The display panel of the present invention may be a Thin
Film Transistor Liquid Crystal Display (TFT-LCD) or an Active
Matrix Organic Light Emitting Diode (AMOLED) panel.
[0031] The present invention installs the extended sensing line in
the touch-detecting area (i.e. the dead area), forming mutual
capacitance in the touch-detecting area, thus the dead area has
mutual capacitance. It leads to a smaller fluctuation of a
corresponding linearity of the touch panel, making the positioning
of touches more accurate.
[0032] To illustrate technical solutions of the present invention,
embodiments are provided as follows.
The First Embodiment
[0033] Please refer to FIG. 2A, showing a schematic diagram of the
touch panel according to a first embodiment of the present
invention. For the convenience of explanation, only parts that are
relevant to the present embodiment are shown.
[0034] The touch panel comprises a plurality of sensing lines 201
disposed in a sensing area to generate sensing signals, and a
plurality of touch-controlling lines 202 disposed in the
touch-detecting area to receive touch-controlling signals. Among
them a plurality of touch-controlling lines 202 extends to the
sensing area so to form mutual capacitance. The sensing line 201
extends into the touch-detecting area as an extended sensing line
203, forming mutual capacitance in the touch-detecting area. It
effectively decreases the dead areas and therefore makes the
positioning of touches more accurately.
[0035] In the present embodiment, the extended sensing line 203 is
connected to one end of the sensing line 201.
[0036] The touch panel comprises a plurality of sensing areas, with
each comprising a plurality of sensing lines 201, forming a
plurality of semi-closed spaces. The semi-closed spaces are lined
vertically, with an opening of each neighboring space facing
opposite directions. The touch-controlling line 202 is embedded in
the semi-closed spaces so to form mutual capacitance. The
touch-controlling line 202 on the left is embedded in the
semi-closed space with opening facing left, while the
touch-controlling line 202 on the right is embedded in the
semi-closed space with opening facing right. The advantage of the
present design is that it increases effective touch-detecting
areas.
[0037] Specifically, a semi-closed space is formed by three sensing
lines 201, two in parallel and the other crossing them
perpendicularly.
[0038] Please refer to FIG. 2B, showing another diagram of the
touch panel according to a first embodiment of the present
invention. The touch panel comprises a plurality of sensing areas,
with each comprising a plurality of semi-closed spaces formed by
one sensing line 201. The semi-closed spaces are lined vertically,
with the opening of each neighboring space facing opposite
directions. The touch-controlling line 202 is embedded in the
semi-closed space so to form mutual capacitance. The
touch-controlling line 202 on the left is embedded in the
semi-closed space with opening facing left, while the touch
touch-controlling line 202 on the right is embedded in the
semi-closed space with opening facing right. The advantage of the
present design is that it increases effective touch-detecting
areas.
[0039] In the present embodiment, the touch-controlling line 202
comprises a first branch and a second branch. The first branch is
in L-shape, with one end meeting the second branch perpendicularly.
In the present embodiment, the second branch and part of the first
branch are embedded into the semi-closed space formed by the
sensing line 201 to form mutual capacitance. The advantage of the
present design is that it increases effective touch-detecting
areas.
[0040] In the present embodiment, the materials of the sensing line
201 and touch-controlling line 202 can be Indium Tin Oxide(ITO),
metal mesh or graphene.
[0041] In the present embodiment, the sensing line 201 and
touch-controlling line 202 form mutual capacitance. When the
sensing line 201 and touch-controlling line 202 are pressed, they
create different capacitances on different locations. Therefore the
capacitance can be used to locate the position of a touch. As
illustrated above, the first embodiment installs extended sensing
lines on both sides of a sensing area. The extended sensing line on
the left forms mutual capacitance with a touch-controlling line
TX5, and the extended sensing line on the right forms mutual
capacitance with a touch-controlling line TX4. Therefore, it
decreases the dead areas of the touch-controlling lines TX5 and
TX4.
The Second Embodiment
[0042] Please refer to FIG. 3, showing a schematic diagram of the
touch panel according to a second embodiment of the present
invention. For the convenience of explanation, only parts that are
relevant to the present embodiment are shown.
[0043] The second embodiment is similar to the first embodiment,
but the difference is the touch panel of the second embodiment
further comprises a direction touch-controlling line 204. It is
installed between the extended sensing line 203 and the neighboring
touch-controlling line 202, so to form mutual capacitance with the
extended sensing line 203 in the touch-detecting area.
[0044] In the present embodiment, the direction touch-controlling
line 204 is a line extending along a column direction. The line is
installed between the extended sensing line 203 and the neighboring
touch-controlling line 202, forming mutual capacitance with the
extended sensing line 203 in the touch-detecting area.
[0045] In the present embodiment, the sensing line 201 and
touch-controlling line 202 form mutual capacitance. When the
sensing line 201 and touch-controlling line 202 are pressed, they
create different capacitances on different locations. Therefore
capacitances can be used to locate the position of a touch.
[0046] As illustrated above, the second embodiment installs the
direction touch-controlling lines 204 between the extended sensing
lines 203 and the neighboring sensing lines 202. The direction
touch-controlling line 204 is a vertically positioned strait line.
The extended sensing line on the left forms mutual capacitance with
the direction touch-controlling line 204 on the left, and the
extended sensing line on the right forms mutual capacitance with
the direction touch-controlling line 204 on the right, thus
decreases the dead areas.
The Third Embodiment
[0047] Please refer to FIG. 4, showing a schematic diagram of the
touch panel according to a third embodiment of the present
invention. For the convenience of explanation, only parts that are
relevant to the present embodiment are shown.
[0048] The third embodiment is similar to the first embodiment, but
the difference is the touch panel of the third embodiment further
comprises a direction touch-controlling line 204. It is installed
between the extended sensing line 203 and the neighboring
touch-controlling line 202, so to form mutual capacitance with the
extended sensing line 203 in the touch-detecting area.
[0049] In the present embodiment, the direction touch-controlling
line 204 and the extended sensing line 203 are both L-shaped. The
L-shaped touch-controlling line 204 is installed between the
extended sensing line 203 and the neighboring touch-controlling
line 202, forming mutual capacitance with the extended sensing line
203 in the touch-detecting area. It effectively decreases dead
areas.
[0050] In the present embodiment, the sensing line 201 and
touch-controlling line 202 form mutual capacitance. When the
sensing line 201 and touch-controlling line 202 are pressed, they
create different capacitances on different locations. Therefore
capacitance can be used to locate the position of a touch.
[0051] As illustrated above, the present embodiment installs the
direction touch-controlling line 204 between the extended sensing
line 203 and the neighboring touch-controlling line 202. The
touch-controlling line 204 is in L-shape, with the short end of the
"L" forming mutual capacitance with the extended sensing line. Thus
it decreases the dead areas close to the lower edge of the touch
screen.
The Fourth Embodiment
[0052] The present invention further proposes a display device. For
the convenience of explanation, only parts that are relevant to the
present embodiment are shown. The display device comprises a
display panel and a touch panel thereon. The display panel displays
images, and the touch panel identifies a contact on a surface of
the touch panel.
[0053] The touch panel comprises a plurality of sensing lines 201
disposed in a sensing area to generate sensing signals, and a
plurality of touch-controlling lines 202 disposed in the
touch-detecting area to receive touch-controlling signals. Among
them a plurality of touch-controlling lines 202 extends to the
sensing area so to form mutual capacitance. The sensing line 201
extends into the touch-detecting area as an extended sensing line
203, forming mutual capacitance in the touch-detecting area. The
touch panel further comprises a direction touch-controlling line
204. It is installed between the extended sensing line 203 and the
neighboring touch-controlling line 202, so to form mutual
capacitance with the extended sensing line 203 in the
touch-detecting area. It effectively decreases the dead areas and
therefore makes the positioning of touches more accurately.
[0054] In the present embodiment, the extended sensing line 203 is
connected to one end of the sensing line 201.
[0055] In the present embodiment, the direction touch-controlling
line 204 is a line extending along a column direction. The line is
installed between the extended sensing line 203 and the neighboring
touch-controlling line 202, forming mutual capacitance with the
extended sensing line 203 in the touch-detecting area.
[0056] In the present embodiment, the direction touch-controlling
line 204 and the extended sensing line 203 are both L-shaped. The
L-shaped touch-controlling line 204 is installed between the
extended sensing line 203 and the neighboring touch-controlling
line 202, forming mutual capacitance with the extended sensing line
203 in the touch-detecting area.
[0057] In the present embodiment, the sensing line 201 and
touch-controlling line 202 form mutual capacitance. When the
sensing line 201 and touch-controlling line 202 are pressed, they
create different capacitances on different locations. Therefore
capacitance can be used to locate the position of a touch.
[0058] The present embodiment installs extended sensing lines on
both sides of the sensing areas of the touch panel. The extended
sensing line on the left forms mutual capacitance with the
touch-controlling line TX5, and the extended sensing line on the
right forms mutual capacitance with the touch-controlling line TX4.
Therefore, it decreases the dead areas of the touch-controlling
lines TX5 and TX4. The present embodiment also installs the
direction touch-controlling line 204 between the extended sensing
line 203 and the neighboring touch-controlling line 202. The
direction touch-controlling line 204 is in L-shape, with the short
end of the "L" forming mutual capacitance with the extended sensing
line. Therefore it decreases the dead areas close to the lower edge
of the touchscreen.
[0059] In summary, the touch panel and display device provided by
the present invention install extended sensing lines in
touch-detecting areas (i.e. dead areas). It forms mutual
capacitances in the touch-detecting areas and dead areas, which are
thus effectively decreased. Therefore, the fluctuation of a
corresponding linearity of the touch panel is smaller, making the
positioning of touches more accurate.
[0060] Moreover, despite one or more implementations relative to
the present disclosure being illustrated and described, equivalent
alterations and modifications will occur to others skilled in the
art upon reading and understanding this specification and the
annexed drawings. The present disclosure comprises such
modifications and variations, and is to be limited only by the
terms of the appended claims. In particular, regarding the various
functions performed by the above described components, the terms
used to describe such components (i.e. elements, resources, etc.)
are intended to correspond (unless otherwise indicated) to any
component, which performs the specified function of the described
component (i.e., that is functionally equivalent), even though not
structurally equivalent to the disclosed structure which performs
the function in the illustrated implementations of the disclosure.
In addition, although a particular feature of the disclosure may
have been disclosed with respect to only one of several
implementations, such a feature may be combined with one or more
other features of the other implementations as may be desired and
advantageous for any given or particular application. Also, to the
extent that the terms "including", "includes", "having", "has",
"with", or variants thereof are used in the detailed description or
in the claims, such terms are intended to be inclusive in a manner
similar to the term "comprising".
[0061] The embodiments were chosen and described in order to
explain the principles of the disclosure and their practical
application so as to activate others skilled in the art to utilize
the disclosure and various embodiments and with various
modifications as are suited to the particular use contemplated.
Alternative embodiments will become apparent to those skilled in
the art to which the present disclosure pertains without departing
from its spirit and scope. Accordingly, the scope of the present
disclosure is defined by the appended claims, rather than the
foregoing description and the exemplary embodiments described
therein.
* * * * *