Abstract: An apparatus and a method for acquiring object image of a pointer are provided. The apparatus is suitable for an optical touch system and is used for acquiring an object image of a pointer when the pointer interacts with a touch surface of the optical touch system. The apparatus includes an image sensor and a processing circuit. The image sensor is used for acquiring an image of the touch surface. When the pointer approaches the touch surface, the processing circuit compares at least a part of the information of a sensed image with a threshold value, so as to determine a comparison range. Then, the processing circuit determines another threshold value according to the image information in the comparison range. Afterwards, the processing circuit compares the image information in the comparison range with the aforementioned another threshold value, so as to acquire an object image of the pointer.

Abstract: An optical touch system, an apparatus and a method for calculating the position of an object are provided. The apparatus includes an image sensor and a processing circuit. The processing circuit selects at least one dot from a curve segment of a brightness distribution profile obtained from a background image, wherein the curve segment corresponds to an imaging range of an object. And the processing circuit regards the column pixel brightness value corresponding to the dot as a brightness reference value. Afterwards, the processing circuit calculates brightness difference between the brightness reference value and the column pixel brightness values corresponding to the dots of a curve segment of a brightness distribution profile obtained from a sensed image, so as to further calculate a gravity of the imaging range. After that, the processing circuit regards the gravity as a representative position of the object in the sensed image.

Abstract: An apparatus and a method for acquiring object image of a pointer are provided. The apparatus is suitable for an optical touch system and is used for acquiring an object image of a pointer when the pointer interacts with a touch surface of the optical touch system. The apparatus includes an image sensor and a processing circuit. The image sensor is used for acquiring an image of the touch surface. When the pointer approaches the touch surface, the processing circuit compares at least a part of the information of a sensed image with a threshold value, so as to determine a comparison range. Then, the processing circuit determines another threshold value according to the image information in the comparison range. Afterwards, the processing circuit compares the image information in the comparison range with the aforementioned another threshold value, so as to acquire an object image of the pointer.

Abstract: An optical touch system includes a touch surface having a first touch region and a second touch region, a reflective member for generating a reflection of an object on the touch surface, an image sensor for providing an image of the object and an image of the reflection, and a processing unit. The image sensor is represented by either first reference coordinate data or second reference coordinate data. The processing unit is configured to compute the coordinate data of the object using the first reference coordinate data, the image of the object, and the image of the reflection to when the object is in the first touch region, and configured to compute the coordinate data of the object using the second reference coordinate data, the image of the object, and the image of the reflection when the object is in the second touch region.

Abstract: An optical touch system includes an image sensor module and a processor. The image sensor module includes a plurality of image sensing elements that can be independently controlled to achieve different exposure times. The plurality of image sensor elements can produce a picture including a plurality of pixel groups. The processor is configured to extract an intensity value of each pixel group and to select a set of successive pixel groups as an object image according to the intensity values of the pixel groups.

Abstract: A reflecting sheet includes a base, a plurality of protruding structure and a plurality of reflecting micro structures. The base has a first surface. The protruding structures are disposed on the first surface of the base. The reflecting micro structures are disposed on the protruding structures. An optical touch device using the reflecting sheet is also provided. The reflecting sheet can effectively reflect incident light rays with different incident angles. The optical touch device has simple structure and is easily assembled.

Abstract: A light path adjusting assembly includes a supporting component and a light path adjusting component. The supporting component includes a mounting portion, a light transmission portion and a connecting portion. The light transmission portion faces to the mounting portion. The connecting portion is located between and is connected to the mounting portion and the light transmission portion, thereby forming a receiving space between the mounting portion and the light transmission portion. The light path adjusting component is disposed in the receiving space. An optical touch device using the light path adjusting assembly is also provided. The light path adjusting assembly and the optical touch device have a simple manufacturing process and a high production yield.

Abstract: A fan system including a motor with a coil, a storage unit, a driver, and a buffer circuit is provided. The coil module has a first connection terminal and a second connection terminal. The storage unit electrically couples with a voltage source, stores electrical energy when the voltage source is available, and releases the stored electrical energy to carry out a brake operation when the voltage source is unavailable. The driver electrically couples with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module. The buffer circuit electrically couples with the coil module. In the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period.

Abstract: An image processing method for an optical touch system includes the steps of obtaining an image and generating a light distribution curve pattern from the image, selecting a target signal of the light distribution curve pattern in accordance with light intensity information of the light distribution curve pattern, determining at least one rising slope and at least one falling slope of the target signal, and selecting the target signal as an object signal when the absolute values of the at least one rising slope and at least one falling slope are greater than a threshold.

Abstract: An optical touch screen system includes a sensing device and a processing unit. The sensing device includes first and second sensors, each generating an image. The images include the image information of a plurality of objects. The processing unit generates a plurality of candidate coordinates according to the image information and selects a portion of the candidate coordinates as output coordinates according to an optical feature of the image information.

Abstract: A touch system and an optical touch system with a power-saving mechanism are presented. The touch system includes a sensing module and a processing module electrically connected to the sensing module; the optical touch system includes an optical sensing module and a processing module electrically connected to the optical sensing module. The processing module modulates a working frequency and/or a working voltage of the processing module according to a touch point count on a touch region, a preset function of the processing module, and/or an imaging count detected by the optical sensing module, so as to decrease a power consumption of the processing module. An electronic device equipped with such system may not only dynamically adjust the working frequency and/or the working voltage of the processing module, but also can determine a working frequency and/or a working voltage satisfying a report rate through an input of the system.

Abstract: An optical touch screen system includes a touch screen, an image-sensing device, and a processing device. The image-sensing device generates a plurality of light-shielding information of an object at a plurality of time points. The processing device coupled to the image-sensing device includes a computing unit calculating a projected size difference value according to the plurality of light-shielding information, wherein the projected size difference value is a difference value between the projected sizes of the object on the touch screen at two different time points.

Abstract: The present invention provides an optical touch system configured to determine an object region according to a brightness information acquired by a brightness sensing unit and to identify a block information of objects within the object region according to an image information acquired by an image sensing unit. The present invention further provides an objection detection method for an optical touch system.

Abstract: An electronic device includes a housing, an optical touch module, and a detecting unit. The housing includes a first body and a second body, and an angle is formed between the first body and the second body. The optical touch module executes a positioning function by sensing signals. The detecting unit is configured to the optical touch module, and is used for detecting the angle. When the angle is smaller than a predetermined angle, the detecting unit instructs the optical touch module to pause executing the positioning function, so as to avoid false position determinations by the optical touch module.

Abstract: The present invention provides an image sensing module including an image sensing device and a calculation device. The image sensing device includes a plurality of pixels for acquiring an operation image containing an object image. The calculation device stores a look-up table regarding a temperature related parameter and a position deviation of the object image at each pixel associated with the temperature related parameter, and selects a deformation error from the look-up table according to the temperature related parameter corresponding to the operation image so as to correct a current position of the object image in the operation image.

Abstract: An optical touch system, an apparatus and a method for calculating the position of an object are provided. The apparatus includes an image sensor and a processing circuit. The processing circuit selects at least one dot from a curve segment of a brightness distribution profile obtained from a background image, wherein the curve segment corresponds to an imaging range of an object. And the processing circuit regards the column pixel brightness value corresponding to the dot as a brightness reference value. Afterwards, the processing circuit calculates brightness difference between the brightness reference value and the column pixel brightness values corresponding to the dots of a curve segment of a brightness distribution profile obtained from a sensed image, so as to further calculate a gravity of the imaging range. After that, the processing circuit regards the gravity as a representative position of the object in the sensed image.

Abstract: An apparatus and a method for acquiring object image of a pointer are provided. The apparatus is suitable for an optical touch system and is used for acquiring an object image of a pointer when the pointer interacts with a touch surface of the optical touch system. The apparatus includes an image sensor and a processing circuit. The image sensor is used for acquiring an image of the touch surface. When the pointer approaches the touch surface, the processing circuit compares at least a part of the information of a sensed image with a threshold value, so as to determine a comparison range. Then, the processing circuit determines another threshold value according to the image information in the comparison range. Afterwards, the processing circuit compares the image information in the comparison range with the aforementioned another threshold value, so as to acquire an object image of the pointer.

Abstract: A sensing device includes a housing and an image sensing system disposed in the housing and used for detecting a reflected light from an object. The image sensing system includes a substrate, a light sensing element, and a reflection and redirection element. The light sensing element is disposed on the substrate. The reflection and redirection element is disposed between the light sensing element and the object, and used for reflecting and redirecting the reflected light from the object to a receiving direction of the light sensing element, such that the light sensing element receives the reflected light and generates a corresponding sensing signal.

Abstract: A fan system including a motor with a coil, a storage unit, a driver, and a buffer circuit is provided. The coil module has a first connection terminal and a second connection terminal. The storage unit electrically couples with a voltage source, stores electrical energy when the voltage source is available, and releases the stored electrical energy to carry out a brake operation when the voltage source is unavailable. The driver electrically couples with the first and second connection terminals of the coil module to control a direction of an inductor current passing through the coil module. The buffer circuit electrically couples with the coil module. In the brake operation, the buffer circuit operates to form a transient potential between the first and second connection terminals of the coil module and to consume electrical energy of the inductor current, for gradually stopping the motor in a buffering time period.

Abstract: An electronic apparatus with a virtual data input device includes a first body, a second body, a sensing plane, an image sensing module and a processor. A display is disposed on the second body. The sensing plane is disposed on the first body and configured for generating an initiating signal when a user presses the sensing plane. The image sensing module is disposed on the second body and configured for sensing the pressing action on the sensing plane by the user and generating an image signal that carries the information of the pressed position on the sensing plane. The processor is electrically connected with the sensing plane and the image sensing module, and configured for processing the image signal after the initiating signal is generated so that data corresponding to the pressing action of the user is input to the electronic apparatus.