OPTICAL IMAGING PEN WITH DISPLACEMENT DETECTION CIRCUITRY
First Claim
1. An optical imaging pen configured to detect information encoded with infrared ink on a page, said pen comprising:
- a housing;
an ink pen cartridge and a stylus mounted side by side in the housing, the ink cartridge and stylus configured to be individually brought forward through an open end of the housing by rotation of a pen top rotatably mounted on an end of the housing;
an infrared LED in the housing for providing infrared radiation for projection onto the page;
an image sensor for receiving reflected radiation from the surface; and
a controller for controlling operation of the LED and sensor, the controller having a force sensor photodiode configured to detect displacement of the stylus to enable a determination of a force being applied to a nib of either the cartridge or stylus, the controller having analog-to-digital converter circuitry for converting analog signals from the force sensor diode into digital signals capable of encoded transmission.
1 Assignment
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Accused Products
Abstract
Provided is optical imaging pen configured to detect information encoded with infrared ink on a page. The pen includes a housing. An ink pen cartridge and a stylus are mounted side by side in the housing. The ink cartridge and the stylus are configured to be individually brought forward through an open end of the housing by rotation of a pen top rotatably mounted on an end of the housing. The pen also includes an infrared LED inside the housing for providing infrared radiation for projection onto the page, and an image sensor for receiving reflected radiation from the surface. The pen further includes a controller for controlling operation of the LED and sensor, the controller having a force sensor photodiode configured to detect displacement of the stylus to enable a determination of a force being applied to a nib of either the cartridge or stylus. The controller also has analog-to-digital converter circuitry for converting analog signals from the force sensor diode into digital signals capable of encoded transmission.
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Citations
7 Claims
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1. An optical imaging pen configured to detect information encoded with infrared ink on a page, said pen comprising:
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a housing; an ink pen cartridge and a stylus mounted side by side in the housing, the ink cartridge and stylus configured to be individually brought forward through an open end of the housing by rotation of a pen top rotatably mounted on an end of the housing; an infrared LED in the housing for providing infrared radiation for projection onto the page; an image sensor for receiving reflected radiation from the surface; and a controller for controlling operation of the LED and sensor, the controller having a force sensor photodiode configured to detect displacement of the stylus to enable a determination of a force being applied to a nib of either the cartridge or stylus, the controller having analog-to-digital converter circuitry for converting analog signals from the force sensor diode into digital signals capable of encoded transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification