US 9,870,076 B1Granted

Transmitter pen positioning system

AssigneeNanjing Jiafan Electronic Technologies Co., Ltd.

InventorAlfred Samson Hou

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Abstract

A transmitter pen positioning system includes a transmitter pen, at least two photo-receiving modules, and a signal processing unit. The transmitter pen generates a light beam signal. Each photo-receiving module has an optical lens and a photo-receiving sensor. The photo-receiving sensor receives the light beam signal passing through the optical lens via a first photo-receiving surface and a second photo-receiving surface and correspondingly converts the light beam signal into a first photocurrent signal and a second photocurrent signal. The signal processing unit receives the first and the second photocurrent signals, and correspondingly calculates an incident angle of the light beam signal according to a difference between the first and the second photocurrent signals and calculate position information of the transmitter pen according to the at least two incident angles. Accordingly, the complexity of the positioning system is simplified and a real-time position calculation is implemented.

Claims15

Dependent claims

A transmitter pen positioning system applied to a writing surface, the transmitter pen positioning system comprising:

a transmitter pen comprising:
a light emitting element configured to generate a light beam signal;
at least two photo-receiving modules installed at different positions on the writing surface, and each photo-receiving module comprising:
an optical lens mounted on an exterior surface of the photo-receiving module and configured to receive the light beam signal to make the light beam signal pass through the optical lens;
and
a photo-receiving sensor having a first photo-receiving surface and a second photo-receiving surface, and the photo-receiving sensor configured to receive the light beam signal via the first photo-receiving surface and the second photo-receiving surface and correspondingly convert the light beam signal into a first photocurrent signal and a second photocurrent signal;
and
a signal processing unit electrically connected to the at least two photo-receiving modules and configured to receive the first photocurrent signal and the second photocurrent signal from each photo-receiving sensor, and the signal processing unit configured to correspondingly calculate an incident angle of the light beam signal on the optical lens of each photo-receiving module according to a difference operation between the first photocurrent signal and the second photocurrent signal and calculate position information of the transmitter pen on the writing surface according to the at least two incident angles.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 15/256,510Filed 3 Sep 2016
Granted: 16 Jan 2018
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06F 3/0386
Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry: for light pen
G06F 3/03542
With detection of two-dimensional [2D] relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D…
G06F 3/03545
With detection of two-dimensional [2D] relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D…
G06F 3/0383
Control and interface arrangements therefor, e.g. drivers or device-embedded control circuitry: signal control means within the pointing device