KR20100056117A - Apparatus for optical touch screen - Google Patents
Apparatus for optical touch screen Download PDFInfo
- Publication number
- KR20100056117A KR20100056117A KR1020080115128A KR20080115128A KR20100056117A KR 20100056117 A KR20100056117 A KR 20100056117A KR 1020080115128 A KR1020080115128 A KR 1020080115128A KR 20080115128 A KR20080115128 A KR 20080115128A KR 20100056117 A KR20100056117 A KR 20100056117A
- Authority
- KR
- South Korea
- Prior art keywords
- light
- beam splitter
- light receiving
- column beam
- touch screen
- Prior art date
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Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/0304—Detection arrangements using opto-electronic means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
- G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical touch screen device, comprising a light source for generating light and a plurality of beam splitters for reflecting a portion of the light generated from the light source, wherein the light travels through a portion of the plurality of beam splitters and the plurality of beam splitters. By intersecting the progress of the light reflected from the other part of the, it is possible to accurately grasp the position information of the indicating means while reducing the location where the light source is installed.
Description
The present invention relates to a touch screen device, and more particularly to an optical touch screen using light.
The touch screen device is an input device that detects the position of the pointing means directly on the display screen so that an input corresponding to the position can be made.
Such touch screen devices include pressure sensitive touch screen devices and optical touch screen devices. The pressure sensitive touch screen device senses the position of the pointing means by using a change in the resistance value of the position of the resistance sheet to which pressure is applied using a pressure sensitive resister (PSR).
The optical touch screen device sets coordinates by dividing the touch screen horizontally and vertically, and independently installs a light emitting source or a light receiving sensor on the horizontal axis and the vertical axis of each coordinate to receive the light receiving sensor when the indicating means such as a finger is placed on the touch screen. The position of the indicating means is determined by using the received light signals generated by the.
On the other hand, such an optical touch screen device has a limitation in the resolution of the coordinates because there is a limit to the installation location of the light emitting source and the light receiving sensor. In order to overcome the shortcomings of the optical touch screen device, Korean Laid-Open Patent Publication No. 10-2007-0054607 discloses that a single light source or a plurality of light sources are installed at a single point or a plurality of light sources to generate a single light source. The laser light is distributed to the image sensor through an optical fiber installed at a position opposite to a single or a plurality of light sources, and the laser light is blocked by the indicating means at any position of the touch screen by performing image processing on the laser transmitted through the optical fiber. It has been proposed an optical touch screen device for acquiring the position of the indicating means by grasping whether or not.
However, the conventional optical touch screen device proposed in the aforementioned publication has a disadvantage in that the position of the indicating means cannot be accurately determined when one light source is used, and when a plurality of light sources are used, a plurality of light sources are used. This has the disadvantage of being installed.
The idea of the present invention is to provide an optical touch screen device that can accurately grasp the position information of the indicating means while reducing the location where the light source is installed.
To this end, the optical touch screen according to an embodiment of the present invention includes a light source for generating light and a plurality of beam splitters reflecting a part of the light generated from the light source, and the progress and the plurality of light reflected from a portion of the plurality of beam splitters. The propagation of light reflected from the other part of the beamsplitter of the intersects.
Here, the light source is a laser diode or LED that generates infrared light.
The plurality of beam splitters includes a first column beam splitter group and a second column beam splitter group. Here, the angle between the first column beam splitter group and the second column beam splitter group is approximately right angle. The light source is also disposed between the first column beam splitter group and the second column beam splitter group.
In addition, the light source may be adjacently connected to the first column beam splitter group and the second column beam splitter group, and disposed at one end of the connected first column beam splitter group and the second column beam splitter group. Here, a light propagation direction changing member for changing the light propagation direction is disposed between the first column beam splitter group and the second column beam splitter group.
The apparatus may further include a plurality of light receiving sensors generating a light receiving signal depending on whether the reflected light reflected by each of the plurality of beam splitters is received.
Here, a condenser lens for condensing the reflected light to the light receiving surface is disposed in front of the light receiving surface of each of the plurality of light receiving sensors.
The plurality of light receiving sensors include a first heat receiving sensor group and a second heat receiving sensor group, and an angle between the first light receiving sensor group and the second heat receiving sensor group is approximately right angle.
Each of the plurality of light receiving sensors receives the reflected light through the optical fiber, and the plurality of light receiving sensors are integrally formed. Here, a condenser lens for condensing the reflected light to the light receiving portion is disposed in front of the incident portion of the optical fiber.
As described above, the optical touch screen device according to the embodiment of the present invention can accurately grasp the location information of the indicating means while reducing the location where the light source is installed.
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
1 to 3, an optical
The
The
Each of the plurality of
Some of the plurality of
Each
Meanwhile, a portion where the beam splitter 20 including the
Each of the
The second row beam splitter group 20-2 is disposed at right angles to the first row beam splitter group 20-1 to be parallel to each other toward the
The plurality of
A plurality of light condensing light in front of the
Each
The
Hereinafter, the operation of the optical touch screen device according to the first embodiment of the present invention will be described with reference to the accompanying drawings.
Referring to FIG. 4, first, when the
The infrared light incident on the incident end 20-1a of the first column beam splitter group 20-1 passes through each
On the other hand, if there is no object such as the indicating means (O) on the
On the contrary, the instruction means O causes the traveling path of the reflected light of the beam splitter n20 corresponding to the n-th of the first column beam splitter group 20-1 on the
The
Hereinafter, an optical touch screen device according to a second embodiment of the present invention will be described. However, the optical touch screen device will be described in detail only in comparison with the first embodiment of the present invention.
Referring to FIG. 5, in the optical touch screen device according to the second embodiment of the present invention, the incident end 20-1a of the first column beam splitter 20-1 and the second column beam splitter 20-2 are provided. The exit ends 20-2b are disposed adjacent to each other.
The second row beam splitter 20-2b is disposed between the incidence end 20-1a of the first row beam splitter group 20-1 and the exit end 20-2b of the second row beam splitter 20-2. The light propagation
The
The number of light source elements can be reduced by the optical touch screen device according to the second embodiment of the present invention.
Hereinafter, an optical touch screen according to a third embodiment of the present invention will be described, but the description will be limited to parts compared with the first embodiment of the present invention.
Referring to FIG. 6, the optical touch screen device according to the third embodiment of the present invention further includes a
Each of the plurality of
The
And the
By the optical touch screen device according to the third embodiment of the present invention, the screen may have a small area. In other words, the optical touch screen device according to the third embodiment of the present invention may be installed in a display device having a small display screen.
1 is a plan view schematically showing an optical touch screen device according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of A of FIG. 1.
3 is an enlarged view of a portion B of FIG. 1.
4 is a view for explaining the operation of the optical touch screen device according to a first embodiment of the present invention.
5 is a plan view schematically showing an optical touch screen device according to a second embodiment of the present invention.
6 is a plan view schematically showing an optical touch screen device according to a third embodiment of the present invention.
Description of the Related Art [0002]
2: touch screen 20: beam splitter
30: light receiving sensor 100: optical fiber
150: light traveling direction change member
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080115128A KR20100056117A (en) | 2008-11-19 | 2008-11-19 | Apparatus for optical touch screen |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080115128A KR20100056117A (en) | 2008-11-19 | 2008-11-19 | Apparatus for optical touch screen |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020150084946A Division KR20150079510A (en) | 2015-06-16 | 2015-06-16 | Apparatus for optical touch screen |
Publications (1)
Publication Number | Publication Date |
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KR20100056117A true KR20100056117A (en) | 2010-05-27 |
Family
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KR1020080115128A KR20100056117A (en) | 2008-11-19 | 2008-11-19 | Apparatus for optical touch screen |
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KR (1) | KR20100056117A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012018179A2 (en) * | 2010-08-02 | 2012-02-09 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
WO2012023706A2 (en) * | 2010-08-17 | 2012-02-23 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
KR20120021695A (en) * | 2010-08-13 | 2012-03-09 | 엘지전자 주식회사 | Mobile terminal |
KR101135277B1 (en) * | 2010-09-07 | 2012-04-12 | 최도희 | Infrared touch screen devices |
KR101236200B1 (en) * | 2011-02-23 | 2013-02-22 | 주식회사 에이에프오 | Touch screen using multi reflection |
KR101296722B1 (en) * | 2010-11-24 | 2013-08-20 | 최도현 | Touch screen device using optical fiber |
CN103268173A (en) * | 2013-05-30 | 2013-08-28 | 京东方科技集团股份有限公司 | Infrared touch screen |
KR101491430B1 (en) * | 2011-11-28 | 2015-02-11 | 네오노드, 인크. | Optical elements with alternating reflective lens facets |
US9086761B2 (en) | 2010-12-27 | 2015-07-21 | Samsung Display Co., Ltd. | Display apparatus |
WO2017030397A1 (en) * | 2015-08-18 | 2017-02-23 | 주식회사 엠오에스 (Mos) | Display device having optical touch screen function |
-
2008
- 2008-11-19 KR KR1020080115128A patent/KR20100056117A/en active Application Filing
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8976157B2 (en) | 2010-08-02 | 2015-03-10 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
WO2012018179A3 (en) * | 2010-08-02 | 2012-03-29 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
WO2012018179A2 (en) * | 2010-08-02 | 2012-02-09 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
KR20120021695A (en) * | 2010-08-13 | 2012-03-09 | 엘지전자 주식회사 | Mobile terminal |
WO2012023706A2 (en) * | 2010-08-17 | 2012-02-23 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
WO2012023706A3 (en) * | 2010-08-17 | 2012-04-12 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
US8976156B2 (en) | 2010-08-17 | 2015-03-10 | Lg Innotek Co., Ltd. | Camera module and optical touch screen using the same |
KR101135277B1 (en) * | 2010-09-07 | 2012-04-12 | 최도희 | Infrared touch screen devices |
KR101296722B1 (en) * | 2010-11-24 | 2013-08-20 | 최도현 | Touch screen device using optical fiber |
US9086761B2 (en) | 2010-12-27 | 2015-07-21 | Samsung Display Co., Ltd. | Display apparatus |
KR101236200B1 (en) * | 2011-02-23 | 2013-02-22 | 주식회사 에이에프오 | Touch screen using multi reflection |
KR101491430B1 (en) * | 2011-11-28 | 2015-02-11 | 네오노드, 인크. | Optical elements with alternating reflective lens facets |
CN103268173A (en) * | 2013-05-30 | 2013-08-28 | 京东方科技集团股份有限公司 | Infrared touch screen |
CN103268173B (en) * | 2013-05-30 | 2016-06-01 | 京东方科技集团股份有限公司 | A kind of infrared touch panel |
WO2017030397A1 (en) * | 2015-08-18 | 2017-02-23 | 주식회사 엠오에스 (Mos) | Display device having optical touch screen function |
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