CN203414922U - Optical multi-point touch control equipment based on LCD (liquid crystal display) - Google Patents
Optical multi-point touch control equipment based on LCD (liquid crystal display) Download PDFInfo
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- CN203414922U CN203414922U CN201320171735.1U CN201320171735U CN203414922U CN 203414922 U CN203414922 U CN 203414922U CN 201320171735 U CN201320171735 U CN 201320171735U CN 203414922 U CN203414922 U CN 203414922U
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Abstract
The utility model provides optical multi-point touch control equipment based on an LCD (liquid crystal display). A protection screen is attached on the front side of an LCD panel, a diffusion sheet is attached on the back side, the protection screen, the diffusion sheet and the LCD panel form a front panel, an infrared light source, a back light source and a camera array are arranged behind the front panel, and a display driving system, a power supply system and an image processing system are also arranged behind the front panel. Under the irradiation effect of the infrared light source, a camera catches images of touch objects such as fingers, through the analysis by an image identification system, the distance from the touch objects such as the fingers to the touch surface is determined, whether the touch surface is touched or not is judged, and in addition, the touch intensity is calculated through the deformation during the touch between the touch surface and objects such as fingers or soft pens, and is provided for upper layer software, so good user experiences such as natural writing with writing vigor and stroke thickness can be realized.
Description
Technical field
The utility model relates to a kind of touch control device, particularly a kind of optical multi-touch equipment based on LCD.
Background technology
Existing multipoint-touch-technology comprises resistance-type, condenser type, and surface acoustic wave, optics frame etc., these technology can coordinate LCD display device to use, but all effectively dynamics of perception touch-control and the shape of touch object.Meanwhile, resistance-type and capacitive technologies exist touch face fragility or cover glass is excessively thin, the problem of poor durability; Optics frame exists surface non-pure flat, is unsuitable for the problem that level is used, and also have the optical profile type multipoint-touch-technology based on projector equipment, but it is poor to exist display effect, needs the shortcomings such as maintenance.Therefore,, in order to overcome existing multipoint-touch-technology above shortcomings, be necessary to make improvements.
Utility model content
The utility model is to solve the problems of the technologies described above the technical scheme adopting to be, a kind of optical multi-touch equipment based on LCD is provided, and wherein, before LCD panel, adheres to protection screen, after adhere to diffusion sheet, three forms front panel; Front panel rear arranges infrared light supply, back light and camera array; Front panel rear is also provided with display driving system, power-supply system and image processing system.
Above-mentioned a kind of optical multi-touch equipment based on LCD, wherein, a side of described infrared light supply, back light and camera array is installed astigmatism plate, and reflector is installed in described astigmatism plate both sides.
Above-mentioned a kind of optical multi-touch equipment based on LCD, wherein, described protection screen, LCD panel and diffusion sheet three are adhesively fixed by the transparent adhesive tape of refractive index 1.35～1.55.
Above-mentioned a kind of optical multi-touch equipment based on LCD, wherein, described protection screen is selected anti-dazzle tempered glass.
Above-mentioned a kind of optical multi-touch equipment based on LCD, wherein, described anti-dazzle tempered glass thickness is 5mm.
The utility model contrast prior art has following beneficial effect:
1, based on LCD, compare the touch-control system of projection, there is display effect good, there is Maintenance free.
2, the tempered glass protection screen that assembles large thickness, has high durability, can horizontal positioned, be applicable to public place, many people, children and the application scenarios widely such as military.
3, can perception finger, the touching intensity of the touch objects such as soft pen, provide the writing effect that thickness has the true nature of the vigour of style in writing.
4, in the situation of the position contact touch faces such as palm, wrist, arm, still can accurately identify position and the dynamics of finger tip or nib, clearly grasp the intention that embodies operator.
Accompanying drawing explanation
The structural representation of a kind of optical multi-touch equipment based on LCD that Fig. 1 provides for the utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model will be further described.
The structural representation of a kind of optical multi-touch equipment based on LCD that Fig. 1 provides for the utility model, is respectively in figure: LCD panel 1, protection screen 2, diffusion sheet 3, infrared light supply 4, camera array 5, reflector 6, astigmatism plate 7, back light 8, display driving system 9, power-supply system 10, image processing system 11.
The utility model provides a kind of optical multi-touch equipment based on LCD, front panel, rear panel, image identification system 11, display driving system 9 and power-supply system 10 5 major parts, consists of.Wherein front panel starts to be followed successively by protection screen 2 from touch face, LCD panel 1, diffusion sheet 3; On rear panel, be provided with back light 8, infrared light supply 4, camera array 5, astigmatism plate 7, reflector 6; Image identification system 11 is responsible for receiving the data from camera array 5, processing and identification touch control operation; The display that display driving system 9 receives from computing machine, drives LCD to show; Power-supply system 10 is given back light 8, infrared light supply 4 and all other system power supplies.
Front panel, comprising:
Protection screen 2: be the anti-dazzle tempered glass that 5mm is thick in the present embodiment, in order to robust touch face to be provided, protection LCD.
LCD panel 1: be LCD front panel, be responsible for display frame.
Diffusion sheet 3: the light in order to diffusion from back light system, provides uniform picture.In the present embodiment, three is adhesively fixed with the transparent adhesive tape that refractive index is 1.35～1.55, to eliminate light unnecessary reflection between three.
Rear panel, comprising:
Back light 8: in the present embodiment, be white LED lamp pearl array, in order to provide display frame required light.Infrared light supply 4: in the present embodiment, be 850nm infrared LED lamp pearl array, wait and touch object in order to illumination finger, catch for camera.
Camera array 5: in the present embodiment, be 6 cameras to infrared-sensitive, wait in order to catch finger the picture that touches object, offer image identification system.
Astigmatism plate 7: in the present embodiment, choosing has filled astigmatism plate 7, in order to further fuzzy back light, provides more uniform picture.
Reflector 8: in the present embodiment, on 4 of plate facades, choosing has filled reflector 6 in the back, in order to more effectively to utilize the light from back light 8 and infrared light supply 4.
Display driving system 9: in order to receive the display from computing machine, in the present embodiment, be HDMI, VGA or DVI, driving LCD panel under the cooperation of back light 8, show user interface.
Image identification system 11: the picture catching in order to receive camera, by analysis, carries out Contact recognition, dynamics identification, elbow filters, large object identification, the most one or more users' operation, is converted to the touch-control message that meets its operation intention, offers computing machine.
Power-supply system 10: be back light 8, infrared light supply 4 and the power supply of other electricity consumption devices.
Refer to Fig. 1, a kind of optical multi-touch equipment based on LCD that the utility model provides, in the present embodiment:
At LCD panel 1, adhere to protection screen 2 above, after adhere to diffusion sheet 3, three forms front panel; Front panel rear arranges infrared light supply 4, back light 8 and camera array 5; Front panel rear is also provided with display driving system 9, power-supply system 10 and image processing system 11.Infrared light supply 4 sends infrared light, through front panel, irradiates touch objects, and as finger etc., its reflected light passes through front panel again, is that camera catches imaging; Whether image is analyzed via image identification system 11, obtain touch object distance, contact, the information such as contact dynamics, body form, through intellectual analysis, touch-control message is issued to computing machine and operating system.
For realizing optimum efficiency, a side of infrared light supply 4, back light 8 and camera array 5 can be installed astigmatism plate 7, and reflector 6 can be installed in astigmatism plate 7 both sides.
Protection screen 2, LCD panel 1 and diffusion sheet 3 threes are adhesively fixed by the transparent adhesive tape of refractive index 1.35～1.55, and unnecessary reflection while passing through three to reduce light promotes identification desired signal noise ratio; To reduce deformation and the vibrations of LCD, especially when horizontal positioned and transportation.In addition, protection screen 2 is preferably used anti-dazzle tempered glass, and thickness does not coexist between 1mm to 12mm according to LCD size and application scenarios; Front surface can be done anti-dazzle, and antireflection is processed.
Above-mentioned a plurality of cameras can one or more synchronous workings, and each camera visual field covers a part for touch face, and the visual field stack of all cameras covers whole touch face.The visual field of two cameras can be all or part of overlapping, in overlapping region, two cam stereo imagings, thus identify more exactly the position of touch objects, to touch identity distance from and touching intensity.
, there is the change of the caused contact area of deformation by touch objects during touch face in contact in image identification system 11, analyzes the touching intensity information that draws.By the analysis to surface of contact shape, automatic fitration is fallen palm, arm etc. and is contacted without intention, retains the contact information of finger tip, nib etc., thereby promotes the user's experience as operations such as writing.For the equipment of horizontal positioned, when being placed on touch face just like the large object such as teacup, file, recognition system automatically switches to table model, shields all touch control operations, avoids user interface by unconscious operation; After large object is taken away, the control mode touch mode that automatically switches back, can normally carry out touch control operation.
Front panel and rear panel combination form a rectangular parallelepiped, and wherein front panel forms the upper surface of rectangular parallelepiped; In rear panel, back light 8, infrared light supply 4 and camera display 5 are arranged in rectangular parallelepiped lower surface, cover above on 7, four facades of astigmatism plate and cover reflector 6.
Although the utility model discloses as above with preferred embodiment; so it is not in order to limit the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when doing a little modification and perfect, so protection scope of the present invention is worked as with being as the criterion that claims were defined.
Claims (5)
1. the optical multi-touch equipment based on LCD, is characterized in that: before LCD panel, adhere to protection screen, after adhere to diffusion sheet, three forms front panel; Front panel rear arranges infrared light supply, back light and camera array; Front panel rear is also provided with display driving system, power-supply system and image processing system.
2. a kind of optical multi-touch equipment based on LCD according to claim 1, is characterized in that: a side of described infrared light supply, back light and camera array is installed astigmatism plate, and reflector is installed in described astigmatism plate both sides.
3. a kind of optical multi-touch equipment based on LCD according to claim 1, is characterized in that: described protection screen, LCD panel and diffusion sheet three are adhesively fixed by the transparent adhesive tape of refractive index 1.35～1.55.
4. a kind of optical multi-touch equipment based on LCD according to claim 1, is characterized in that: described protection screen is selected anti-dazzle tempered glass.
5. a kind of optical multi-touch equipment based on LCD according to claim 4, is characterized in that: described anti-dazzle tempered glass thickness is 5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320171735.1U CN203414922U (en) | 2013-04-09 | 2013-04-09 | Optical multi-point touch control equipment based on LCD (liquid crystal display) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320171735.1U CN203414922U (en) | 2013-04-09 | 2013-04-09 | Optical multi-point touch control equipment based on LCD (liquid crystal display) |
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| Publication Number | Publication Date |
|---|---|
| CN203414922U true CN203414922U (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320171735.1U Expired - Fee Related CN203414922U (en) | 2013-04-09 | 2013-04-09 | Optical multi-point touch control equipment based on LCD (liquid crystal display) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102394A (en) * | 2013-04-09 | 2014-10-15 | 北京紫霄科技有限公司 | Optical multi-point touch control equipment and method |
| CN104391613A (en) * | 2014-12-11 | 2015-03-04 | 北京轩文文化发展有限公司 | Calligraphic handwriting obtaining system based on optical principle |
| JP2021117379A (en) * | 2020-01-27 | 2021-08-10 | 株式会社ジャパンディスプレイ | Electronic apparatus |
-
2013
- 2013-04-09 CN CN201320171735.1U patent/CN203414922U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102394A (en) * | 2013-04-09 | 2014-10-15 | 北京紫霄科技有限公司 | Optical multi-point touch control equipment and method |
| CN104391613A (en) * | 2014-12-11 | 2015-03-04 | 北京轩文文化发展有限公司 | Calligraphic handwriting obtaining system based on optical principle |
| CN104391613B (en) * | 2014-12-11 | 2017-06-16 | 北京轩文文化发展有限公司 | Calligraphy person's handwriting based on optical principle obtains system |
| JP2021117379A (en) * | 2020-01-27 | 2021-08-10 | 株式会社ジャパンディスプレイ | Electronic apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Zixiao Science and Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140129 Termination date: 20140409 |