CN102141863A - Strip-like light source used in optical touch system - Google Patents
Strip-like light source used in optical touch system Download PDFInfo
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- CN102141863A CN102141863A CN2011100523918A CN201110052391A CN102141863A CN 102141863 A CN102141863 A CN 102141863A CN 2011100523918 A CN2011100523918 A CN 2011100523918A CN 201110052391 A CN201110052391 A CN 201110052391A CN 102141863 A CN102141863 A CN 102141863A
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- light
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- circuit board
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- guide device
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Abstract
The invention relates to a strip-like light source used in an optical touch system. The optical touch system is provided with indication space, wherein the indication space is provided with a first plane direction. The strip-like light source comprises a strip-like circuit board, a plurality of light emitting components and a light guide component, wherein the strip-like circuit board provides circuits, is provided with a second plane direction and is arranged on the edge of the indication space; the second plane direction is parallel to the first plane direction; the plurality of light emitting components are arranged along the extension direction of the strip-like circuit board and are jointed on the circuits of the strip-like circuit board; the light guide component is arranged on or above the plurality of light emitting components; each light emitting component is driven by the strip-like circuit board to emit light toward the light guide component; and the light is guided by the light guide component and then passes through the indication space. The strip-like light source can provide light with high brightness and uniformity ratio.
Description
[technical field]
The present invention is about a kind of band light source (strip-like light source), and especially, the present invention is about a kind of band light source that is used for optical touch control system (optical touch system).
[background technology]
Because touch control type screen (touch screen) can allow the operator intuitively see through the advantage that the coordinate input of relative display is carried out in the way of contact, touch control type screen has become the input media of the common configuration of display now.Touch control type screen to be to be widely used in all kinds of electronic products with display, for example, and display, notebook computer, panel computer, ATM (Automatic Teller Machine), point-of-sale terminals, visitor's guide system, industrial control system etc.
Except the touch control screen that operators such as traditional resistor formula, condenser type must contact, the coordinate input mode of utilizing imaging apparatus (image-capturing device) to allow the operator need not really to touch display also is used.Utilize the related prior art of the contactless touch-control system (or being called optical touch control system) of imaging apparatus to ask for an interview the 4th, 507, No. 557 patents of United States Patent (USP) notification number, seldom do at this and give unnecessary details.Above-mentioned in the optical image mode, the optical touch control system of reaching the object space judgement also can be applied to touch-control plotting sheet, touch control controller etc. except that can be applicable to touch control screen.
The operation principles of optical touch control system is when the screen of object or finger touches configuration optical touch control system (or touch-control plotting sheet, touch control controller), and finger or object can block the light source at the edge that is set up in screen (or touch-control plotting sheet, touch control controller) in the optical touch control system or reflecting element and cause shade.So imaging apparatus will detect a dark relatively signal (image).By the angle function equation that the line of shade and imaging apparatus is set up,, can obtain the position of finger or object via the computing of program.Usually optical touch control system has plural imaging apparatus, sets up at least two angle function equations, in the hope of at least one about pointing or the separating of the position of object.But if finger or object be to shade that light source caused inadequately obviously the time, then aforesaid equation possibly can't be set up, and causes trying to achieve the position of finger or object.The reason that causes imaging apparatus can't detect tangible shade has a lot, but one of them important reasons is the brightness of light source or the demand that light is all spent the system that do not meet together.
See also Fig. 1, the subelement of traditional optical touch control system 1 schematically is illustrated among Fig. 1.Generally speaking, on this optical touch control system 1 configuration screen, touch-control plotting sheet or touch control controller.This optical touch control system 1 has indication space S 1.This indication space S 1 promptly is positioned at the top of screen, touch-control plotting sheet or touch control controller that this optical touch control system 1 disposed.
As shown in Figure 1, this optical touch control system 1 comprises imaging apparatus 16, the imaging apparatus 18 of two corner location that are installed in this indication space S 1 and is set up in light source 10 on the edge of this indication space S 1.When finger or object cover this light source 10 or reflecting element (be arranged at indication space S 1 around, be not illustrated among Fig. 1) and when causing shade, these imaging apparatuss (16,18) will detect a dark relatively signal (image).
Be shown in Fig. 1 equally, this light source 10 comprises light-emitting component 12 (generally adopting light-emittingdiode) and light-guide device 14.This light-emitting component 12 is installed in an end of this light-guide device 14.This light-emitting component 12 is actuated to launch light to this light-guide device 14.The light that this light-guide device 14 is launched this light-emitting component 12 this indication space S 1 that leads.Also there is light source that the design of a light-emittingdiode all is installed at the two ends of light-guide device.Obviously, when the size of this indication space S greatly to a certain degree the time (for example, 23.6 the time), it is not enough (away from light-emitting component 12 places that the framework of then known light source 10 has brightness, brightness will reduce) and inhomogeneous (to go out optical position brightness higher because of nearly light-emitting component 12, and will reduce away from light-emitting component 12 places brightness, and the light that causes light source 10 integral body all degree is not good together) situation.Also have and on the longer edges of this indication space S 1, set up two light sources 10, as shown in Figure 1.But the problem that the brightness of above-mentioned light source reaches brightness irregularities does not inadequately achieve a solution yet.
Therefore, one of the present invention purpose aims to provide a kind of band light source that is used in the optical touch control system, to solve the problem that its brightness of known light source reaches brightness irregularities inadequately.
[summary of the invention]
Band light source according to a preferred embodiment of the present invention, this band light source is used in the optical touch control system, this optical touch control system has the indication space, and this indication space has first in-plane, and this band light source comprises banded circuit board, a plurality of light-emitting component and light-guide device.Provide circuit on this band shape circuit board, this band shape circuit board has second in-plane, and this band shape circuit board is placed in the edge in this indication space, and this second in-plane is parallel with this first in-plane; These a plurality of light-emitting components are arranged and are engaged on the circuit of this band shape circuit board along the bearing of trend of this band shape circuit board; This light-guide device is placed on these a plurality of light-emitting components or is placed in the top of these a plurality of light-emitting components, wherein each light-emitting component is actuated to launch light and this light-guide device of directive via this band shape circuit board, and this light is guided by this light-guide device and then by this indication space.
According to described band light source, each light-emitting component has a smooth areal coverage, and the light areal coverage that these a plurality of light-emitting components are arranged in the light areal coverage that causes each light-emitting component on this band shape circuit board and adjacent light-emitting component is overlapped.
According to described band light source, this light is infrared ray, and each light-emitting component is all the infrared light emission diode.
According to described band light source, the angle of the light areal coverage of each infrared light emission diode is 125 degree.
According to described band light source, this circuit board is flexible circuit board or fabric electric circuit.
According to described band light source, this band light source further comprises reflecting element, and this reflecting element is placed in the upper surface of this light-guide device and away from the side surface in this indication space, this reflecting element enters this light-guide device in order to the part light that reflects this light.
According to described band light source, this band light source further comprises supporting member, and this circuit board and this light-guide device of these a plurality of light-emitting components are installed on this supporting member.
According to described band light source, this reflecting element and this supporting member are identity element.
According to described band light source, the spacing in these a plurality of light-emitting components between the two adjacent light-emitting components is less than or equal to 10.2mm.
Compare with known light source, can fully solve the problem that its brightness of known light source reaches brightness irregularities inadequately according to band light source of the present invention.
Can be further understood by following embodiment and accompanying drawing about the advantages and spirit of the present invention.
[description of drawings]
Fig. 1 is the subelement synoptic diagram of traditional optical touch control system.
Fig. 2 A is according to the synoptic diagram of the band light source of a preferred embodiment of the present invention and adopt part configuration diagram according to the optical touch control system of band light source of the present invention.
Fig. 2 B is that band light source among Fig. 2 A is along the viewgraph of cross-section of A-A line.
Fig. 2 C is that band light source among Fig. 2 A is along the viewgraph of cross-section of B-B line.
[embodiment]
The invention provides a kind of band light source that is used in the optical touch control system, reach light inadequately and all spend low problem together, can detect tangible shade in order to imaging apparatus to solve its brightness of known light source.Below by detailed description to preferred embodiment of the present invention, use abundant explanation about feature of the present invention, spirit, advantage and the feasibility of implementing.
See also Fig. 2 A, Fig. 2 B and Fig. 2 C, Fig. 2 A is according to the synoptic diagram of the band light source 20 of a preferred embodiment of the present invention and adopt the part configuration diagram of the optical touch control system 2 of this band light source 20.Fig. 2 B be among Fig. 2 A this band light source 20 along the viewgraph of cross-section of A-A line.Fig. 2 C be among Fig. 2 A this band light source 20 along the viewgraph of cross-section of B-B line.Identical with traditional optical touch control system, this optical touch control system 2 is disposed on screen, touch-control plotting sheet or the touch control controller.This optical touch control system 2 has indication space S 2.This indication space S 2 promptly is positioned at the top of screen, touch-control plotting sheet or touch control controller that this optical touch control system 2 disposed.
Shown in Fig. 2 A, this optical touch control system 2 comprises imaging apparatus 28, the imaging apparatus 29 of two corner location that are installed in this indication space S 2.Light source 20 according to the present invention is installed on the edge of this indication space S 2.When finger or object cover this light source 20 or reflecting element (not being illustrated among Fig. 2 A) and when causing shade, these imaging apparatuss (28,29) will detect a dark relatively signal (image).
Shown in Fig. 2 B and Fig. 2 C, comprise banded circuit board 22, a plurality of light-emitting component 24 and light-guide device 26 according to the band light source 20 of preferred embodiment of the present invention.This indication space S 2 has the first in-plane N1, shown in Fig. 2 B.Provide circuit on this band shape circuit board 22.This band shape circuit board 22 has the second in-plane N2.This band shape circuit board 22 is placed in the edge of this indication space S 2, causes this second in-plane N2 parallel with this first in-plane N1 substantially.
Shown in Fig. 2 C, these a plurality of light-emitting components 24 are arranged along the bearing of trend of this band shape circuit board 22, and are engaged on the circuit of this band shape circuit board 22 by for example mode such as soldering, conductive paste.This a plurality of light-emitting components 24 and be electrically connected to driving circuit (not being illustrated among Fig. 2 C) by this band shape circuit board 22.Each light-emitting component 24 is driven with emission light by this driving circuit via this band shape circuit board 22.
Be shown in Fig. 2 B and Fig. 2 C equally, this light-guide device 26 is placed on these a plurality of light-emitting components 24 or is placed in the top of these a plurality of light-emitting components 24.Each light-emitting component 24 is actuated to launch light and this light-guide device 26 of directive via this band shape circuit board 22, and this light is guided by this light-guide device and then by this indication space S 2.By this, this band light source 20 can provide high brightness and even brightness light by this indication space S 2, can detect tangible shade in order to these imaging apparatuss (28,29).In a specific embodiment, this light-guide device 26 is banded light-guide device.
More even for the light luminance that allows band light source 20 according to the present invention be provided, in a specific embodiment, each light-emitting component 24 respectively has the light areal coverage, just relatively radiation intensity greater than 50% radiation areas.For example, shown in Fig. 2 C, each light-emitting component 24 has the light areal coverage that angle is θ.And these a plurality of light-emitting components 24 are arranged on this band shape circuit board 22, cause the light areal coverage of each light-emitting component 24 and the light areal coverage of adjacent light-emitting component 24 to be overlapped.Perhaps, the light areal coverage of adjacent light-emitting component 24 next-door neighbour is shown in Fig. 2 C.
In a specific embodiment, this light is infrared ray, and each light-emitting component 24 is all the infrared light emission diode, and for example, emission wavelength is that infrared transmitter or the emission wavelength of 850nm is the infrared transmitter of 940nm.That is to say that this imaging apparatus 28 only can be responded to some extent to the infrared spectrum that light-emitting component 24 is launched.
In practical application, the naked crystalline substance that each light-emitting component 24 can adopt the infrared light emission diode not encapsulate, the angle of its light areal coverage can be up to 125 degree.By this, can reduce according to total number of the band light source 20 light emitting source element 24 that adopts of the present invention, and also can dwindle according to the thickness of band light source 20 of the present invention.
In a specific embodiment, this circuit board 20 can be flexible circuit board or fabric electric circuit, in order to the volume that dwindles according to band light source 20 of the present invention.
Be shown in Fig. 2 B and Fig. 2 C equally, the band light source 20 according to another preferred embodiment of the present invention further comprises reflecting element 27.This reflecting element 27 is placed in the upper surface of this light-guide device 26 and away from the side surface of this indication space S 2.This reflecting element 27 enters this light-guide device 26 in order to the part light that reflects this light, uses the intensity that increases by the light of this indication space S 2.
In a specific embodiment, shown in Fig. 2 C, the spacing d in these a plurality of light-emitting components 24 between the two adjacent light-emitting components 24 is fixing spacing.In another specific embodiment, the spacing d in these a plurality of light-emitting components 24 between the two adjacent light-emitting components 24 is revocable spacing.
Be shown in Fig. 2 B and Fig. 2 C equally, the band light source 20 according to another preferred embodiment of the present invention further comprises supporting member 27.This band shape circuit board 22 and this light-guide device 26 of these a plurality of light-emitting components 24 are installed on this supporting member 27.In practical application, this reflecting element 27 is an identity element with this supporting member 27, and in brief, the part light that these supporting member 27 these light-guide devices 26 of reflection are derived enters this light-guide device 26.
In an application examples, the inner edge of this supporting member 27 has the height t of about 4mm, and the spacing d in these a plurality of light-emitting components 24 between the two adjacent light-emitting components 24 is less than or equal to 10.2mm, and by this, this band light source 20 can provide the brightness uniform light.
Significantly,, can be well understood to according to band light source of the present invention all light of degree together of high brightness and light can be provided, can detect tangible shade in order to the imaging apparatus of optical touch control system by above detailed description of the present invention.
The present invention is described by above-mentioned related embodiment, yet the foregoing description is only for implementing example of the present invention.Must be pointed out that the embodiment that has disclosed does not limit the scope of the invention.On the contrary, change of being done and retouching without departing from the spirit and scope of the present invention all belongs to scope of patent protection of the present invention.
Claims (9)
1. band light source, this band light source is used in the optical touch control system, and this optical touch control system has the indication space, and this indication space has first in-plane, it is characterized in that this band light source comprises:
Banded circuit board provides circuit on this band shape circuit board, and this band shape circuit board has second in-plane, and this band shape circuit board is placed in the edge in this indication space, and this second in-plane is parallel with this first in-plane;
A plurality of light-emitting components, these a plurality of light-emitting components are arranged and are engaged on the circuit of this band shape circuit board along the bearing of trend of this band shape circuit board; And
Light-guide device, this light-guide device is placed on these a plurality of light-emitting components or is placed in the top of these a plurality of light-emitting components, wherein each light-emitting component is actuated to launch light and this light-guide device of directive via this band shape circuit board, and this light is guided by this light-guide device and then by this indication space.
2. according to claim 1 a described band light source, it is characterized in that: each light-emitting component has a smooth areal coverage, and the light areal coverage that these a plurality of light-emitting components are arranged in the light areal coverage that causes each light-emitting component on this band shape circuit board and adjacent light-emitting component is overlapped.
3. according to claim 2 a described band light source, it is characterized in that: this light is infrared ray, and each light-emitting component is all the infrared light emission diode.
4. according to claim 3 a described band light source, it is characterized in that: the angle of the light areal coverage of each infrared light emission diode is 125 degree.
5. according to claim 2 a described band light source, it is characterized in that: this circuit board is flexible circuit board or fabric electric circuit.
6. band light source according to claim 2, it is characterized in that: this band light source further comprises reflecting element, this reflecting element is placed in the upper surface of this light-guide device and away from the side surface in this indication space, this reflecting element enters this light-guide device in order to the part light that reflects this light.
7. according to claim 6 a described band light source, it is characterized in that: this band light source further comprises supporting member, and this circuit board and this light-guide device of these a plurality of light-emitting components are installed on this supporting member.
8. according to claim 7 a described band light source, it is characterized in that: this reflecting element and this supporting member are identity element.
9. described band light source according to Claim 8 is characterized in that: the spacing in these a plurality of light-emitting components between the two adjacent light-emitting components is less than or equal to 10.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100523918A CN102141863A (en) | 2011-03-04 | 2011-03-04 | Strip-like light source used in optical touch system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100523918A CN102141863A (en) | 2011-03-04 | 2011-03-04 | Strip-like light source used in optical touch system |
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| Publication Number | Publication Date |
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| CN102141863A true CN102141863A (en) | 2011-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100523918A Pending CN102141863A (en) | 2011-03-04 | 2011-03-04 | Strip-like light source used in optical touch system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306066A (en) * | 2011-08-20 | 2012-01-04 | 苏州佳世达电通有限公司 | Optical touch system |
| CN102521829A (en) * | 2011-11-22 | 2012-06-27 | 无锡海森诺科技有限公司 | Optical touch image calibrating method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0121840A2 (en) * | 1983-04-01 | 1984-10-17 | Siemens Aktiengesellschaft | Position determination device for an object within a field of view |
| JP2000123691A (en) * | 1998-10-15 | 2000-04-28 | Harness Syst Tech Res Ltd | Light projecting and receiving device for optical touch switch device |
| CN101441541A (en) * | 2007-11-19 | 2009-05-27 | 乐金显示有限公司 | Multi touch flat display module |
| US20090135625A1 (en) * | 2007-11-27 | 2009-05-28 | Sony Corporation | Display device and optical device |
| CN101661691A (en) * | 2009-08-24 | 2010-03-03 | 友达光电股份有限公司 | Low-electromagnetic touch-control induction interference backlight module and display device |
-
2011
- 2011-03-04 CN CN2011100523918A patent/CN102141863A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0121840A2 (en) * | 1983-04-01 | 1984-10-17 | Siemens Aktiengesellschaft | Position determination device for an object within a field of view |
| JP2000123691A (en) * | 1998-10-15 | 2000-04-28 | Harness Syst Tech Res Ltd | Light projecting and receiving device for optical touch switch device |
| CN101441541A (en) * | 2007-11-19 | 2009-05-27 | 乐金显示有限公司 | Multi touch flat display module |
| US20090135625A1 (en) * | 2007-11-27 | 2009-05-28 | Sony Corporation | Display device and optical device |
| CN101661691A (en) * | 2009-08-24 | 2010-03-03 | 友达光电股份有限公司 | Low-electromagnetic touch-control induction interference backlight module and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306066A (en) * | 2011-08-20 | 2012-01-04 | 苏州佳世达电通有限公司 | Optical touch system |
| CN102521829A (en) * | 2011-11-22 | 2012-06-27 | 无锡海森诺科技有限公司 | Optical touch image calibrating method |
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Application publication date: 20110803 |