A lighting control method of an optical pointing device is provided. An electric current is applied to a light emitting element within a predetermined turned-on period of an image sampling cycle, so that the light emitting element generates a light beam projected on a work surface where the optical pointing device is placed. A surface image of the work surface is captured by an image sensor within the predetermined turned-on period of the image sampling cycle. The surface image is analyzed to obtain a brightness of the surface image within the image sampling cycle. A current value of the electric current applied to the light emitting element according to the brightness of the surface image is determined before a starting point of a next image sampling cycle, such that a brightness of another surface image captured during the next image sampling cycle is maintained within a predetermined range.

The present invention discloses a method and apparatus for controlling an object movement on a screen. The method senses a first change in a position of a pointing device in a coordinate system to obtain a first displacement, and controls the object movement by a first displacement output ratio according to the first displacement. The method senses a second change in a position of the pointing device in a coordinate system to obtain a second displacement, and controls the object movement by a second displacement output ratio when a difference between a direction of the first displacement and a direction of the second displacement exceeds a first angle threshold, wherein the second displacement output ratio is lower than the first displacement output ratio.

There is provided an image display system including a navigation device and an inertial unit. The navigation device outputs displacements at a report rate. The inertial unit may provide an inertial displacement for continuously controlling a cursor motion after the displacements decrease to zero.

An optical mouse operated with respect to an illuminated surface outside the optical mouse is provided. The optical mouse includes a light source configured to emit a light beam, and a light pipe including a first optical element and a second optical element. The light beam enters the light pipe through the first optical element, and then propagates in the light pipe from the first optical element to the second optical element without reflection, and then leaves the light pipe through the second optical element, and then illuminates the illuminated surface. The light pipe does not have any protrusion extending therefrom and attached to a front surface of the light source.

A hybrid system which detects and tracks objects in three-dimensional space using a light source disposed in spaced relation to a projection surface, defining a volume of space illuminated by said light source. A light sensor responsive to illumination falling on the projection surface measures illumination levels over a predefined image plane associated with the light sensor, producing a projected image signal. A structured light source projects a structured light within the volume of space and a structured light sensor records reflected structured light from objects occupying the volume of space producing a structured light signal. A correlation processor receptive of the projected image signal and said structured light signal and adapted to compute a hybrid signal indicative of the position of an object within said space and from which other information about the object may be extracted.

Disclosed is a circuit for detecting working and resting states for an optical mouse. During each frame capture, a counting unit of the digital logic circuit outputs a first counting signal to turn on a switching transistor, such that the voltage of the pixel capacitor varies from its predetermined voltage, and the counting unit starts to count. The automatic gain control module outputs a second counting signal as the voltage of the pixel capacitor varies one threshold from the predetermined voltage, such that the counting unit stops counting and outputs a counting value. A computing unit computes a difference between the counting value and a reference counting value. The optical mouse is in a resting state if the difference is equal to or smaller than a threshold difference, and otherwise the optical mouse is in a working state.

An automatic magnification adjusting method is applied to an optical navigation device. The optical navigation device has an illumination channel, a reference channel and an imaging channel. The reference channel has a reference feature with a known parameter. The automatic magnification adjusting method includes driving the illumination channel and the reference channel to alternatively output a detecting image and a reference image, capturing a series of navigation images consisting of the detecting image and the reference image by the imaging channel, analyzing the reference image to recognize the reference feature, calculating a compensating factor according to a detected parameter of the reference feature, and adjusting magnification of the detecting image by the compensating factor to output corresponding coordinate displacement.

Provided is an infrared reflective patterned product including: an infrared reflective pattern portion which includes an infrared reflective material in a region constituting at least a part of a support, in which the infrared reflective pattern portion has an uneven structure that includes a plurality of protruding portions and/or recessed portions, metal particles are contained on surfaces of the protruding portions and/or recessed portions of the uneven structure of the infrared reflective pattern portion, the metal particles include 60 number-percent or greater of tabular metal particles in a hexagonal shape or a circular shape, and the tabular metal particles which are plane-oriented so that an angle between a principal plane of the tabular metal particle and a surface of the uneven structure closest to the tabular metal particle is in a range of 0° to ±30° are adjusted to be 50 number-percent or greater of all tabular metal particles. In the infrared reflective patterned product, the ratio of the reflectance of the infrared reflective pattern portion at a wavelength with the highest reflectance in an infrared region of 780 nm to 2500 nm to the reflectance of a non-pattern portion is large in a case where the infrared reflective pattern portion is obliquely irradiated with infrared rays.

Styluses with active color indicator functionality are disclosed. The styluses are intended for use with a touch sensitive device. The active color generally refers to the color currently in use by the touch sensitive device, such as in a virtual drawing or note taking application. Active colors can be selected using the touch sensitive device and/or the stylus itself. When the active color is selected using the touch sensitive device, the stylus receives the active color information and indicates the color on the stylus (e.g., via a correspondingly colored LED or LCD or a color rotation mechanism). When the active color is selected from the stylus itself, that color is indicated on the stylus and active color information is transmitted to the touch sensitive device. The active color can be displayed such that it is detectable regardless of stylus position (e.g., no blind spots).

There is provided an optical navigation system including a light source, a first photosensitive unit, a second photosensitive unit, a control unit and a processing unit. The light source is configured to emit light of a predetermined wavelength. The first photosensitive unit is configured to receive reflected light of the predetermined wavelength reflected by a working surface. The second photosensitive unit is covered with a coating to block light of the predetermined wavelength. The control unit is configured to control the light source, the first photosensitive unit and the second photosensitive unit to expose both the first photosensitive unit and the second photosensitive unit when the light source is turned on. The processing unit is configured to read first image data and second image data respectively from the first photosensitive unit and the second photosensitive unit thereby identifying an ambient light mode or a liftoff mode.