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121:) beam above the virtual keyboard. The user's finger makes a keystroke on the virtual keyboard. This breaks the infrared beam and reflects light back to the projector. The reflected beam passes through an infrared filter to the camera. The camera photographs the angle of incoming infrared light. The sensor chip determines where infrared beam was broken. Software determines the action or character to be generated.
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An infra-red plane of light is generated on the interface surface. The plane is however situated just above and parallel to the surface. The light is invisible to the user and hovers a few millimeters above the surface. When a key position is touched on the surface interface, the light is reflected
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image sensor in the sensor module. The sensor chip has a custom hardware embedded such as the
Virtual Interface Processing Core and it is capable of making a real-time determination of the location from where the light was reflected. The processing core may track not only one, but multiple light
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engineers in 1992. It optically detects and analyses human hand and finger motions and interprets them as operations on a physically non-existent input device like a surface with painted or projected keys. In that way, it can emulate unlimited types of manually operated input devices (such as a
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is projected onto a surface: when a user touches the surface covered by an image of a key, the device records the corresponding keystroke. Some connect to
Bluetooth devices, including many of the latest smartphone, tablet, and mini-PC devices with Android, iOS or Windows operating system.
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in the sensor module receives the positional information corresponding to the light flashes from the sensor processing core, interprets the events and then communicates them through the appropriate interface to external devices. By events it is understood any key stroke, mouse or
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mouse, keyboard, and other devices). Mechanical input units can be replaced by such virtual devices, potentially optimized for a specific application and for the user's physiology, maintaining speed, simplicity, and unambiguity of manual data input.
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A template produced by a specially designed and highly efficient projection element with a red diode laser is projected onto the adjacent interface surface. The template is not however involved in the detection process.
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keyboard. The projected keyboard size is usually 295 mm x 95 mm and it is projected at a distance of 60 mm from the virtual keyboard unit. The projection keyboard detects up to 400 characters per minute.
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developed a projection keyboard using their proprietary "electronic perception technology." The company subsequently licensed the technology to
Celluon of Korea.
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Apart from simply being used to type, some laser keyboard systems can function as a virtual mouse or even as a virtual piano, such as the crowd-funded iKeybo.
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Bluetooth dongle technology enables the projection keyboard for point to multi-point connectivity with other
Bluetooth devices, such as PCs,
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module and illumination module. The main devices and technologies used to project the image are a diffractive optical element, red laser
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The reflected light user interactions with the interface surface is passed through an infra-red filter and imaged on to a
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The way that
Bluetooth projection keyboards connect to devices depends on the specific tablet, phone or computer.
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reflections at the same time and it can support multiple keystrokes and overlapping cursor control inputs.
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262: Hans E. Korth: "Method and device for optical input of commands or data". filed on 07.02.1992
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Most projection keyboards use a red diode laser as a light source and may project a full size
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from the infra-red plane in the vicinity of the key and directed towards the sensor module.
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projects visible virtual keyboard onto level surface. It is a modern input device. A
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movements. Software converts the coordinates to identify actions or characters.
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444:"This Magic Box Turns Any Surface Into A Virtual Keyboard Or Piano"
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Projection keyboards connect to the computer either through
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The projection is realized in four main steps and via three
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360:"Honda investing in chips to help cars see - Roadshow"
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140:sensor chip and an infrared (IR) laser diode.
94:A laser projection keyboard used with a tablet
52:virtual keyboard was invented and patented by
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78:to create a portable computer the size of a
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117:Some devices project a second (invisible
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16:Virtual device projected onto a surface
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74:combines the technology with a small
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110:or camera in the projector picks up
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274:"No Keys, Just Soft Light and You"
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442:Higareda, Desiree (2016-11-29).
358:Kanellos, Michael (2006-09-19).
175:Interpretation and communication
454:from the original on 2018-07-12
399:from the original on 2010-02-25
340:from the original on 2020-05-02
330:"The keyboard that isn't there"
310:from the original on 2020-05-02
280:from the original on 2020-05-03
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328:Shiels, Maggie (2002-10-15).
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70:A proposed system called the
418:"The iTech Virtual Keyboard"
153:Reference plane illumination
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162:Map reflection coordinates
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298:Hesseldahl, Arik (2002).
272:Marriott, Michel (2002).
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35:whereby the image of a
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31:is a form of computer
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300:"Typing On The Table"
128:: projection module,
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23:A projection keyboard
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393:www.wave-report.com
370:on October 23, 2012
144:Template projection
29:projection keyboard
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478:Virtual keyboards
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424:on March 5, 2012
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181:micro-controller
62:start-up company
37:virtual keyboard
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368:the original
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221:mobile phone
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200:Connectivity
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80:fountain pen
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33:input device
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458:2016-12-16
428:2010-03-31
403:2018-07-12
374:2018-07-12
344:2018-07-12
314:2018-07-12
284:2018-07-12
254:EP 0554492
238:References
206:Bluetooth
188:control.
60:In 2002,
472:Category
452:Archived
448:SnapMunk
397:Archived
364:Roadshow
338:Archived
334:BBC News
308:Archived
278:Archived
186:touchpad
119:infrared
126:modules
65:Canesta
50:optical
44:History
304:Forbes
259:
193:QWERTY
130:sensor
112:finger
108:sensor
104:beamer
86:Design
134:diode
100:laser
72:P-ISM
219:and
217:PDAs
179:The
168:CMOS
138:CMOS
210:USB
208:or
102:or
54:IBM
48:An
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245:^
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