Patent application number | Description | Published |
20120098795 | OPTICAL TOUCH SCREEN SYSTEM AND SENSING METHOD FOR THE SAME - 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. | 04-26-2012 |
20120327035 | OPTICAL TOUCH SYSTEM AND IMAGE PROCESSING METHOD THEREOF - 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. | 12-27-2012 |
20120327037 | OPTICAL TOUCH SYSTEM AND CALCULATION METHOD THEREOF - A method of calculating the coordinate data of an object includes the steps of: providing a mirror surface for generating a reflection of an object; providing an image sensor for capturing an image of the object and an image of the reflection; obtaining an individual image of the object when the image of the object and the image of the reflection overlap to form an overlapped image; and calculating the coordinate data of the object based on the overlapped image and the individual image. | 12-27-2012 |
20130033456 | OPTICAL TOUCH SYSTEM AND ELECTRONIC APPARATUS INCLUDING THE SAME - 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. | 02-07-2013 |
20130033457 | IMAGE SENSOR AND OPTICAL TOUCH SYSTEM INCLUDING THE SAME - An image sensor includes a plurality of light detecting elements. The plurality of light detecting elements are arranged in a plurality of rows and a plurality of columns, wherein a flat field picture generated by the image sensor, the intensity standard deviation of pixels in each pixel column is greater than that of pixels in any pixel row, or the intensity standard deviation of pixels in each pixel row is greater than that of pixels of any pixel column. | 02-07-2013 |
20130063402 | OPTICAL TOUCH SYSTEM - An optical touch system includes an image sensor for detecting at least one object and a processor coupled to the image sensor. The processor is configured to determine the number of pixel clusters created by the at least one object on an image generated from the image sensor and to generate gesture information when the number of pixel clusters is greater than a predetermined pixel cluster number. | 03-14-2013 |
20130106785 | OPTICAL TOUCH SYSTEM | 05-02-2013 |
20130271369 | ELECTRONIC SYSTEM - An electronic system includes a device having a screen and an optical touch device. The optical touch device monitors the activity of an object on the screen of the device. When the object performs an operation in a first region of the screen, the optical touch device generates first data; and when the object performs an operation outside the first region, the optical touch device generates second data, wherein the first data and the second data are of different data types. | 10-17-2013 |
20130271429 | TOUCH-CONTROL SYSTEM - A touch-control system adapted to be used with a plurality of pointers is provided. The touch-control system includes a touch-control panel, a first pointer sensing module, a second pointer sensing module and a processing circuit. The first pointer sensing module is configured to sense a first set of image information of the pointers and accordingly calculate a first candidate coordinate group of the pointers. The second pointer sensing module is configured to sense a second set of image information of the pointers. The processing circuit is electrically coupled to the first and second pointer sensing modules and configured to select, according to the second set of image information, two or more coordinate positions in the first candidate coordinate group to as actual coordinate positions of the pointers. | 10-17-2013 |
20140043297 | Optical Touch System and Optical Touch Control Method - An optical touch control method includes steps of: providing a bright background from at least one edge of a touch surface in a first period; providing illumination light to the touch surface in a second period; capturing a first image of an indicator object blocking a portion of the bright background in the first period; and capturing a second image of the indicator object reflecting the illumination light in the second period. An optical touch system is also provided. | 02-13-2014 |
20140055416 | Optical Touch System and Operation Method Thereof - An operation method of an optical touch system is provided. The optical touch system includes a touch surface, a light sensing unit, a switch unit and an analog-to-digital conversion unit. The light sensing unit includes a plurality of light sensing elements. The operation method includes: turning on one specific light sensing element group and thereby configuring the light sensing elements thereof to sense the light on the touch surface; and controlling the switch unit to electrically connect the light sensing elements of the turned-on light sensing element group to the input terminals of the analog-to-digital conversion unit, respectively, so as to transmit the sensing signals outputted from the turned-on light sensing element group to the input terminals, and thereby configuring the analog-to-digital conversion unit to generate at least one digital output signal according to the sensing signals supplied to the input terminals thereof. An optical touch system is also provided. | 02-27-2014 |
20140176964 | OPTICAL TOUCH SYSTEM - An optical touch system comprises a first light-emitting unit, a second light-emitting unit, a first image sensor having a first filter, and a second image sensor having a second filter. The first light-emitting unit generates first wavelength band light. The second light-emitting unit generates second wavelength band light. The first light-emitting unit generates first wavelength band light when the first image sensor is capturing an image. The first filter allows first wavelength band light to enter into the first image sensor and blocks second wavelength band light. The second light-emitting unit generates second wavelength band light when the second image sensor is capturing an image. The second filter allows second wavelength band light to enter into the second image sensor and block first wavelength band light. | 06-26-2014 |