CN103218086B - A kind of optical touch display device - Google Patents
A kind of optical touch display device Download PDFInfo
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- CN103218086B CN103218086B CN201310153292.8A CN201310153292A CN103218086B CN 103218086 B CN103218086 B CN 103218086B CN 201310153292 A CN201310153292 A CN 201310153292A CN 103218086 B CN103218086 B CN 103218086B
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Abstract
The invention provides a kind of optical touch display device, it comprises: a display screen; Multiple striation is arranged at around display screen, and this striation includes light pipe and light source, and the infrared ray that these striations send is appeared by the marginating compartment of the shell of this optical touch display device; Multiple image unit is arranged at the corner of this display screen, and for absorbing the image of infrared ray imaging, in the image absorbed, the image of striation is bright piece, phaeodium shape is spaced apart; In the image that one each image unit of processing unit identification absorbs during the image of touching object, when judging that striation image position has the identical block of continuous multiple pixel property, then these continuous blocks are defined as touching object image, the position according to touch point performs corresponding operating.Optical touch display device of the present invention can realize multiple point touching and use under various circumstances.
Description
Technical field
The present invention relates to optical touch display device, particularly a kind of optical touch display device by image sensing.
Background technology
The electronic installation of current most classes type, as mobile phone, music player, panel computer, e-book, digital photo frame etc. have touch function.Relatively more conventional touching technique has capacitive touch screen, resistive touch screen and infrared touch panel.
In undersized electronic installation, capacitive touch screen, resistive touch screen are comparatively conventional.But, in large scale electronic installation (as advertising display machine, televisor etc.), because its display screen is comparatively large, use capacitive touch screen, resistive touch screen cost higher.
And infrared touch panel has generally comprised at least one group of infrared light emitting diode and infrared receiver diode one to one, infrared light emitting diode is launched infrared ray and can be received by the infrared receiver diode of correspondence, but an object touches or close to (below body is touched or close to being referred to as touch) time, infrared light emitting diode can be stopped and launch infrared ray, corresponding infrared receiver diode can not receiving infrared-ray light, according to the position not having the infrared receiver diode of receiving infrared-ray to judge touch point.But the unlatching of numerous infrared receiver diode of how controlling the size in infrared touch panel, infrared light emitting diode and closedown are comparatively complicated.And generally, infrared touch panel can not detect touch location when multiple touching object touches, and namely infrared touch panel is good at realizing multiple point touching, and multiple point touching is the application of electronic installation tendency.
In the US Patent No. 7,781 of bulletin on August 24th, 2010, disclose a kind of optical touch technology in 722, it is in conjunction with image unit imaging and infrared technology.But by experiment many times, applicant finds that the product disclosed by this patent uses when surround lighting is stronger, time under such as high light in the open, the poor effect of its touch recognition, None-identified identifies position and the response touch operation of touch point accurately.And electronic product uses when surround lighting is stronger under many circumstances.
Summary of the invention
According to the deficiency of above-mentioned touching technique, be necessary to propose a kind of optical touch display device, it realizes simple, and in large-sized electronic installation, cost is lower, and easily can realize multiple point touching and use under various circumstances.
This optical touch display device comprises: a display screen; Multiple striation is arranged at around display screen, and this striation includes light pipe and light source, and the infrared ray that these striations send is appeared by the marginating compartment of the shell of this optical touch display device; Multiple image unit is arranged at the corner of this display screen, and for absorbing the image of infrared ray imaging, in the image absorbed, the image of striation is bright piece, phaeodium shape is spaced apart; In the image that one each image unit of processing unit identification absorbs during the image of touching object, when judging that striation image position has the identical block of continuous multiple pixel property, then these continuous blocks are defined as touching object image, the position according to touch point performs corresponding operating.
Accompanying drawing explanation
Fig. 1 is the one-piece construction schematic diagram of optical touch display device of the present invention.
Fig. 2 is striation placement location schematic diagram in optical touch display device of the present invention.
Fig. 3 A, 3B are the different structure schematic diagram of striation in optical touch display device of the present invention.
Fig. 4 A, 4B are the different structure schematic diagram of the striation of the material/object being provided with filtering infrared ray.
Fig. 5 is the module diagram of optical touch display device of the present invention.
Fig. 6 A, 6B, 6C are the schematic diagram of the image unit imaging of optical touch display device of the present invention.
Fig. 7 is the principle schematic that the present invention determines touch point.
Embodiment
First applicant it should be noted that and only to illustrate in the drawings and the specific embodiments of the present invention and describe in detail and the technology of the present invention innovative point and the structure that is associated, module, function and work flow, and in order to form a complete optical touch display device (as mobile phone, music player, panel computer, e-book, digital photo frame, televisor, advertising display machine etc.) needed for conventional construction, module, function does not illustrate or describes, but also must it should be noted that shown in the drawings and the specific embodiments of the present invention or the structure described in detail, module, function not all is essential features of the present invention.
Refer to the one-piece construction schematic diagram that Figure 1 shows that optical touch display device of the present invention.This optical touch display device 100(is hereinafter referred to as display device 100) include a display screen 10, this display screen 10 can be LED display, LCD display or various bistable display screen.Be provided with multiple striation 30 around display screen 10 under display device 100 shell 20, the infrared ray that each striation 30 sends appears by the interval, edge 40 of shell 20, and the infrared ray that preferably striation 30 sends is that equi-spaced apart appears.In this shell 20, the corner of display screen 10 is provided with multiple image unit 50, this image unit 50 can be the camera of shooting infrared imaging, it can be infrared pick-up head, can also be to be provided with infrared filter before the camera lens module of general camera.In the image that each image unit 50 absorbs, the image of striation 30 is spaced apart in (equidistantly) bright piece, phaeodium shape, and bright piece, phaeodium size is identical.Such as, when at least one object (as finger or writing pencil) is close or when touching (being referred to as touch below) display screen 10, M1 and M2 point in Fig. 1, display device 100 determines the position of touch point according to the image that the plurality of image unit 50 obtains.In the present invention, in the imaging of image unit 50, formed by touching object, image is positioned on image formed by striation 30.
Refer to shown in Fig. 2, each striation 30 is arranged at the different edges on this display screen 10 respectively, and each image unit 50 is arranged at the corner of display screen 10 respectively.In other embodiments, each striation 30 is arranged at the periphery of this display screen 10, and it is peripheral near corner that each image unit 50 is arranged at display screen 10 respectively.In the present embodiment, the quantity of this striation 30 is 4, and image unit 50 is 2-4, and preferably in order to identify multiple touch point, this image unit 50 quantity is more than 2, and such as 3-4 is individual.
Referring to shown in Fig. 3 A, 3B, is the differently composed schematic diagram of striation.In figure 3 a, this striation 30 includes light pipe 32, and one end of this light pipe 32 is provided with light source 34.This light source 34 is infrared ray LED, and the infrared ray uniform conductive that this light source 34 sends is in this light pipe 32.In figure 3b, the two ends of this light pipe 32 are all provided with light source 34.This light source 34 same is infrared ray LED, and the infrared ray uniform conductive that this light source 34 sends is in this light pipe 32.This striation 30 is also provided with a block piece (not shown) shield portions striation 30 near the end of image unit 50, the striation 30 part shield portions that is blocked can not appear infrared ray, the infrared ray interference making image unit 50 avoid being subject to its contiguous striation 30 to appear.Preferably this striation 30 can also be fixed on the edge of display screen 10 or the periphery of display screen 10 by this block piece (not shown).
Refer to shown in Fig. 4 A, 4B, for being provided with the different structure schematic diagram of the striation of the material/object of filtering infrared ray.In Figure 4 A, light pipe 32 is arranged at intervals with the material/object of filtering infrared ray, the position infrared ray that light pipe 32 is provided with filtering infrared ray material/object does not appear, in phaeodium shape in the image that image unit 50 absorbs, and the position infrared ray that light pipe 32 is not provided with the material/object of filtering infrared ray appears, in bright wisp shape in the image that image unit 50 absorbs.Preferably arrange this filtering infrared ray material/object every a preset distance, the position being provided with the material/object of filtering infrared ray is identical with the size at the position of the material/object not being provided with filtering infrared ray.This filtering infrared ray material be anti-infrared paint, optical filter or all can the material of filtering infrared ray or structure.In figure 4b, this light pipe 32 is not provided with the material/object of filtering infrared ray, but is arranged at intervals with the material/object of filtering infrared ray at the edge 40 of shell 20.At other embodiments, can be light pipe 32 and shell 20 edge 40 between be provided with infrared ray interval is appeared block object.
Refer to the module diagram that Figure 5 shows that optical touch display device of the present invention.Each light source 34 and image unit 50 are electrically connected to a processing unit 60, and are subject to processing the control of unit 60.This processing unit 60 can be that single integrated circuit (IC) chip also can the chipset that forms of multiple integrated circuit (IC) chip.This processing unit 60 also for identify each image unit 50 imaging in the image of touching object, and the position of touch point is determined according to the imaging of multiple image unit 50, position according to touch point performs corresponding operating, such as content corresponding to the position of touch point is performed click, double click operation or identify touch gestures, perform corresponding operation according to touch gestures.
In the present invention, due to when there is no touching object, in the image that image unit 50 obtains, the image of striation 30 is bright piece, phaeodium is spaced, and touching object generally has multiple (as 3-5) gap size, in image formed by striation, so there is block that continuous multiple pixel property is identical (phaeodium or bright piece).So in image recognition processes, as long as there is block that continuous multiple pixel property is identical (phaeodium or bright piece) in image formed by striation, so these blocks are the image of touching object.Therefore, these continuous blocks, when identifying the touching object image in the image that each image unit 50 absorbs, when judging that striation image position has the identical block of continuous multiple pixel property, are then defined as touching object image by processing unit 60.
Consulting shown in Fig. 6, is the schematic diagram of the image unit imaging of optical touch display device of the present invention.As shown in Figure 6A, for not having object to touch the image obtained when the display screen 10, image R1, R2 formed by striation 30 are bright piece, phaeodium shape is spaced, and other positions are dim spot.
As shown in Figure 6B, for environment middle infrared (Mid-IR) intensity higher time touching object touch the image obtained when the display screen 10, due to environment middle infrared (Mid-IR) intensity stronger time to be radiated at touching object middle infrared (Mid-IR) comparatively strong, therefore in obtained image, the pixel of the image M1 of touching object is bright spot.Because touching object generally has multiple (as 3-5) gap size, in image formed by striation, so there is continuous multiple bright piece.
As shown in Figure 6 C, for environment middle infrared (Mid-IR) intensity more weak time touching object touch the image obtained when the display screen 10, due to environment middle infrared (Mid-IR) intensity stronger time to be radiated at touching object middle infrared (Mid-IR) more weak, therefore in obtained image, the pixel of the image M1 of touching object is dim spot.Because touching object generally has multiple (as 3-5) gap size, in image formed by striation, so there is continuous multiple phaeodium.
With reference to shown in Fig. 7, for the present invention determines the principle schematic of touch point.Fig. 7 is schematic diagram when only having a touching object.Determine that each image unit 50 obtains the position of the image of touching object, the position of touch point T1 can be determined.Such as image unit 50A obtain touching object image be M1, the line of image unit 50A and M1 is L1; Image unit 50B obtain touching object image be M2, the line of image unit 50B and M2 is L2; Image unit 50C obtain touching object image be M3, the line of image unit 50C and M3 is L3; Image unit 50D obtain touching object image be M4, the line of image unit 50D and M4 is L4.So the joining of L1, L2, L3, L4 is touch point T1, can be determined the coordinate of T1 point by geometric algorithm.In the present invention with a wherein image unit 50 for initial point, this image unit 50 and adjacent image unit 50 line is respectively X-axis, Y-axis sets up coordinate-system.Such as with image unit 50A for initial point, the line of image unit 50A and image unit 50B is X-axis positive axis, and the line of image unit 50A and image unit 50C is Y-axis positive axis.According to this coordinate-system can obtain each image unit 50 become the coordinate figure of the image of the touching object in image, then can be calculated the coordinate of T1 point by geometric algorithm.If when the present invention's invention optical touch display device 10 supports that single-point touches, only need two image units 50.
The image of the touching object that the image in like manner passing through to absorb more than 2 (such as 3-4) image units 50 identifies, can determine the position of multiple touch point.
In the present embodiment, identify that the method for the image of touching object in the imaging of image unit 50 has: (one) sets up the reference picture of each image unit 50 when not having touching object respectively, when identifying the image of touching object in the imaging of a certain image unit 50, obtain the position carrying out identifying the image determining touching object with reference to image and current the obtained image of this image unit 50 of this image unit 50 correspondence.(2) image position of striation 30 in the image of each image unit 50 imaging is previously stored with; When identifying the image of touching object, determining the image position of striation 30 in the image of this image unit 50 imaging, scanning the pixel of described position, determining the position of the image of touching object; Described prestore striation image position in the image of each image unit 50 imaging be for optical touch display device 10 of the present invention manufacture or use for the first time time, each image unit 50 obtains the image that does not have touching object, to publish picture the striation image position in picture according to this image recognition, and store this striation image position.In the present embodiment, each image unit 50 has the identification code for distinguishing different image unit, each image unit 50 obtain image, prestore in striation image position the identification code recording this image unit 50 correspondence, the present invention by a certain image, prestore the identification code recorded in striation image position and indicate corresponding image unit 50.
Claims (7)
1. an optical touch display device, it comprises: a display screen; Multiple striation, it is arranged at around display screen, and this striation includes light pipe and light source, and the infrared ray that these striations send is appeared by the edge of the shell of this optical touch display device; Multiple image unit, it is arranged at the corner of this display screen, for absorbing the image of infrared ray imaging; One processing unit is electrically connected above-mentioned display screen, image unit and light source, for identifying the image of touching object in the image that absorbs from each image unit, and the position of touch point is determined according to identified touching object image, the position according to touch point performs corresponding operating; It is characterized in that:
The infrared ray that described striation sends is that equi-spaced apart appears, in the image that each image unit absorbs, the image of striation is bright piece, phaeodium shape is spaced apart, processing unit is when identifying the image of touching object in the image that each image unit absorbs, when judging that striation image position has the identical block of continuous multiple pixel property, then these continuous blocks are defined as touching object image.
2. optical touch display device as claimed in claim 1, it is characterized in that, described light pipe is arranged at intervals with the material/object of filtering infrared ray, and the position infrared ray that light pipe is provided with filtering infrared ray material/object does not appear.
3. optical touch display device as claimed in claim 1, it is characterized in that, the marginating compartment of shell is provided with the material/object of filtering infrared ray, and the position infrared ray that the edge of shell is provided with filtering infrared ray material/object does not appear.
4. optical touch display device as claimed in claim 2 or claim 3, it is characterized in that, this filtering infrared ray material is anti-infrared paint or optical filter.
5. optical touch display device as claimed in claim 1, is characterized in that, be provided with between light pipe and the edge of shell infrared ray interval is appeared block object.
6. optical touch display device as claimed in claim 1, it is characterized in that, this striation is also provided with a block piece shield portions striation near the end of image unit, and the striation part infrared ray that the part that is blocked blocks can not appear.
7. optical touch display device as claimed in claim 1, it is characterized in that, the two ends of this light pipe are all provided with light source.
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| CN201310153292.8A CN103218086B (en) | 2013-04-28 | 2013-04-28 | A kind of optical touch display device |
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| CN201310153292.8A CN103218086B (en) | 2013-04-28 | 2013-04-28 | A kind of optical touch display device |
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| CN103218086B true CN103218086B (en) | 2016-03-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103631451A (en) * | 2013-11-11 | 2014-03-12 | 吴禹 | Optical touch display device and touch recognition method |
| CN107770466B (en) * | 2017-11-06 | 2019-12-17 | 青岛海信激光显示股份有限公司 | Laser television |
| CN111248889B (en) * | 2020-01-19 | 2021-10-08 | 浙江大学 | Pulse wave measuring device and method based on LED diode and LED display matrix |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201413507Y (en) * | 2009-06-01 | 2010-02-24 | 北京汇冠新技术股份有限公司 | Touch detection device |
| CN101776816A (en) * | 2010-03-04 | 2010-07-14 | 友达光电股份有限公司 | Optical touch display panel |
| CN102789338A (en) * | 2011-05-20 | 2012-11-21 | Afo股份公司 | Infrared touch screen device capable of multi-touch points sensing |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TW201239423A (en) * | 2011-03-28 | 2012-10-01 | Chimei Innolux Corp | Light guide assembly and touch panel |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201413507Y (en) * | 2009-06-01 | 2010-02-24 | 北京汇冠新技术股份有限公司 | Touch detection device |
| CN101776816A (en) * | 2010-03-04 | 2010-07-14 | 友达光电股份有限公司 | Optical touch display panel |
| CN102789338A (en) * | 2011-05-20 | 2012-11-21 | Afo股份公司 | Infrared touch screen device capable of multi-touch points sensing |
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