Beijing Irtouch Systems Co., Ltd

Beijing Intouch Co., Ltd.

Xinbin Liu

Jianjun Liu

Xinlin Ye

Zhenyu Wu

Yuhui Wang

Zhenzhong Zou

Haibing Zhang

Yang Liu

Zhonghua Liu

Weizheng Zhang

Wujun Wang

Xiaodong Shang

Yangqun Wu

Haidong Hao

Haibo Tang

The present invention relates to a touch positioning method, a touch screen, a touch system and a display. The touch positioning method comprises: processing image collected by the first camera to obtain first image data, and processing image collected by the second camera to obtain second image data, wherein the first image data comprise one touch image block, and the second image data comprise at least two touch image blocks; processing the second image data to obtain third image data, the third image data comprising image blocks of two suspected touch objects; obtaining a distance between the two suspected touch objects according to the first image data and the third image data; and obtaining location information of an actual touch object according to the first image data, the third image data and the distance between the two suspected touch objects. The invention may eliminate misjudgment caused by 'crack dot' (FIG.).

Touch positioning method, touch screen, touch system, and display

Disclosed are an infrared touch screen multipoint recognizing method and an infrared touch screen. The method comprises the following steps: driving infrared transmitting tubes and infrared receiving tubes to scan a touch detection area and saving scan data (); reading scan data of the infrared transmitting tubes and the infrared receiving tubes, to determine boundaries of quasi-touch points and obtain a quasi-touch point set (); reading scan data of the infrared transmitting tubes and the infrared receiving tubes aligned with a first direction off-axis, to obtain a first calibrated touch point set (); reading scan data of the infrared transmitting tubes and the infrared receiving tubes aligned with a second direction off-axis, to obtain a second calibrated touch point set (); and comparing the quasi-touch point set, the first calibrated touch point set and the second calibrated touch point set, to eliminate ghost points and determine real touch points (). The infrared touch screen multi-point recognizing method and the infrared touch screen can recognize multiple touch points through one time of full-screen scanning by using only one set of detecting elements.

Infrared touch screen multi-point recognizing method and infrared touch screen

A touch screen and a multi-channel sampling method thereof are disclosed. The touch screen comprises infrared-emitting diodes, infrared-receiving diodes, a touch detection region, first-stage processing circuits, and a second-stage processing circuit. At least two infrared-receiving diodes receive infrared light emitted from the same infrared light-emitting diode simultaneously, and the at least two infrared-receiving diodes output the received signals to the second-stage processing circuit for processing after the first-stage processing circuits filter out interfering light signals. The touch screen and the multi-channel sampling method thereof according to the present invention can be used to increase the multi-channel sampling rate of the touch screen.

Touch screen having a filter for filtering interfering light signals

This invention provides an infrared touch screen, comprising: a touch detecting region; a plurality of edges containing at least a first edge and a second edge, wherein the first edge and the second edge are opposite to each other, there are infrared emitters and infrared receivers fixed on the first edge and there are infrared emitters and infrared receivers fixed on the second edge; and a phase managing mechanism configured to control the phase alternation of the infrared touch screen which has a plurality of phases containing at least a first phase and a second phase. With the structure change and phase managing mechanism application in this infrared touch screen, the light interference caused by varying ambient light can be reduced or eliminated effectively.

Infrared touch screen

A frame component for an infrared touch screen is provided, which can reduce the thickness of the infrared touch screen. The frame component has a light transmission body which is provided with a plurality of first avoid holes and/or first avoid slots along the length direction for avoiding locations of the infrared emitting tubes and infrared receiving tubes. An infrared touch screen comprising the frame component is also provided. The infrared touch screen further comprises a printed circuit board and a lower support component. A plurality of second avoid holes and/or second avoid slots is arranged on the lower support component for avoiding locations of electronic devices. A light transmission part, the printed circuit board and the support components are mutually clamped tightly to form a sandwich structure. The infrared touch screen according to the present invention has advantages of ultra-thinness and good circuit board firmness.

Frame component for infrared touch screen and infrared touch screen

A touch screen, a touch system and a method for positioning a touch object in a touch system are disclosed. The touch screen comprises an infrared pair tube array, wherein said infrared pair tube array is disposed on an edge of said touch screen. By introducing the infrared pair tube array, the touch screen of the present invention eliminates invalid touch areas in the existing touch screen and avoids false touch points in multipoint positioning.

Touch screen, touch system and method for positioning a touch object in touch system

This invention discloses an infrared light-emitting diode. The infrared light-emitting diode comprises: only one core for emitting infrared light; a packaging body which at least comprises a first surface that is convex and in front of the core and a second surface that is plane and on one side of the core; and leads connected to the core and extending to outside of the packaging body; wherein the infrared light emitted by the core forms at least two beams of infrared light in different directions after being emitted from the packaging body through the first surface and the second surface. With such infrared LED and the touch screen, touch system and interactive display based on the LED, at least two beams of infrared light in different directions can be emitted requiring only one core.

Infrared light-emitting diode and touch screen

A control panel and a serial port communication arbiter for a touch screen with a camera are provided. A serial port communication method for a touch screen with a camera includes: transmitting a channel request message to the serial port communication arbiter, the channel request message being used for requesting for occupying the channel between the control panel of the touch screen with camera and an upper computer; receiving a channel response message transmitted by the serial port communication arbiter, the channel response message containing a state of the channel; transmitting data to the upper computer over the channel if the state of the channel is idle. It can save production cost of the control panel, improve system performance, and facilitate maintenance of the control panel.

Control panel and serial port communication arbiter for touch screen with camera

An interactive display device is disclosed. The interactive display device comprises: a housing, a user interface surface which is coupled with the housing, a display panel which is disposed under the user interface surface, an area light detector which is disposed under the display panel and configured to detect invisible light reflected by an object which is on or adjacent to the user interface surface, a plane light guide plate which is disposed under the area light detector, and an invisible light source which is disposed at the side of the plane light guide plate. The interactive display device has small size and better appearance, and thus is easy to be transported and more competitive.

Interactive display device

An image sensor for a touch screen, which is installed at an edge of the touch screen and comprises an image sensing element and an optical imaging system, wherein the optical imaging system comprises: at least two separated lenses to constitute at least two optical paths, wherein each of the lenses includes a concavo-convex lens, an objective lens of each of the lenses is faced to the touch screen, an overlapping area of fields of the view of the objective lenses covers the touch screen, a touch object on the touch screen is imaged by each of the optical paths in the optical imaging system respectively, and the formed image is projected on the image sensing element. The image sensor can locate the touch object by utilizing stereo photography. Moreover, the optical imaging system can utilize the interlocked electronic shutters to realize time division multiplex of the image sensing element by the different optical paths, or utilize individual optical paths to realize area division multiplex of the image sensing element.

Growing community of inventors

Beijing, China

Xinbin Liu