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公开(公告)号：US10303305B2
公开(公告)日：2019-05-28
申请号：US14421391
申请日：2013-08-13
Applicant: Light Blue Optics Ltd
Inventor： Adrian James Cable , Paul Richard Routley , Euan Christopher Smith , Gareth John McCaughan , Peter William Tudor Mash
IPC: G06F3/042
Abstract: Various approaches to touch sensing systems are disclosed As an example, a touch sensing system is disclosed that includes: an optical beam source to provide an optical beam; a pair of controllable beam deflectors comprising at least first and second beam deflectors, wherein the first beam deflector is configured to deflect the optical beam through a first angle towards a touch sensing region, and wherein the second beam deflector is configured to deflect scattered light from an object in the touch sensing region through a second angle; a detector, in particular a detector array; and an imaging system to image the deflected scattered light from the second beam deflector onto the detector array. The first and second beam deflectors are controlled in tandem to scan the touch sensing region.
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Patent Agency Ranking
公开(公告)号：US20180108121A1
公开(公告)日：2018-04-19
申请号：US15831070
申请日：2017-12-04
Applicant: Light Blue Optics Ltd.
Inventor： Gareth John McCaughan , Euan Christopher Smith , Raul John Benet Ballester , Nicholas John Hollinghurst
CPC classification number: G06T5/006 , G06K9/00335 , G06K9/00375 , G06K2009/363 , G06T5/002 , G06T5/005 , G06T7/254 , G06T11/60 , H04N5/04
Abstract: Various approaches related to capturing content of erasable boards are discussed herein.
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公开(公告)号：US20150177861A1
公开(公告)日：2015-06-25
申请号：US14578285
申请日：2014-12-19
Applicant: Light Blue Optics Ltd
Inventor： Gareth John McCaughan , Paul Richard Routley , Euan Christopher Smith , Lilian Lacoste , Julian Hall , Adrian James Cable
IPC: G06F3/041 , G06F3/0354
CPC classification number: G06F3/03545 , G06F3/0304 , G06F3/0426
Abstract: We describe a touch sensing system projecting light defining a touch sheet above a surface and a camera to capture a touch image of light scattered by a pen intersecting the touch sheet. A signal processor identifies a lateral location of the pen. The pen includes a light source to provide a light signal, and the system also includes two photodiodes to detect the signal from the pen. The touch detection is augmented by modelling the signals received at the photodiodes, dependent on the distance and angle of a pen, and using this to derive a probability of the observed received signals given the pen location determined from the touch sheet. This information can be used, for example, to allocate identities to the pens.
Abstract translation: 我们描述一种触摸感测系统，其将指定在表面上方的触摸板的光投射到相机以捕获由与触摸板相交的笔散射的光的触摸图像。 信号处理器识别笔的横向位置。 笔包括提供光信号的光源，并且该系统还包括两个用于检测来自笔的信号的光电二极管。 通过根据笔的距离和角度对在光电二极管处接收的信号进行建模来增强触摸检测，并且使用它来导出给定从触摸片确定的笔位置的观察到的接收信号的概率。 例如，可以使用该信息来将标识分配给笔。
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公开(公告)号：US20140362052A1
公开(公告)日：2014-12-11
申请号：US14369085
申请日：2013-01-17
Applicant: Light Blue Optics Ltd
Inventor： Gareth John McCaughan , Adrian James Cable , Euan Christopher Smith , Paul Richard Routley , Raul Benet Ballester
IPC: G06F3/042
CPC classification number: G06F3/0421 , G06F3/0418 , G06F3/0425 , G06F3/0426
Abstract: We describe a touch sensitive image display device. The device comprises: an image projector to project a displayed image onto a surface in front of the device; a touch sensor light source to project light defining a touch sheet above the displayed image; a camera directed to capture a touch sense image comprising light scattered from the touch sheet by an object approaching the displayed image; and a signal processor to process a the touch sense image to identify a location of the object relative to the displayed image. The camera is able to capture an image projected by the image projector, the image projector is configured to project a calibration image, and the device includes a calibration module configured to use a calibration image from the projector, captured by the camera, to calibrate locations in said captured touch sense image with reference to said displayed image.
Abstract translation: 我们描述一种触敏图像显示设备。 该装置包括：图像投影仪，用于将显示的图像投影到装置前面的表面上; 触摸传感器光源，用于投影在显示图像上方定义触摸板的光; 一种照相机，用于捕获包含从接触片散射的光的触摸感测图像，该对象接近所显示的图像; 以及信号处理器，用于处理所述触摸感测图像以识别所述对象相对于所显示的图像的位置。 相机能够捕获由图像投影仪投影的图像，图像投影仪被配置为投影校准图像，并且该装置包括校准模块，该校准模块被配置为使用来自投影仪的校准图像，由相机拍摄，以校准位置 参考所述显示的图像在所述捕获的触摸感测图像中。
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公开(公告)号：US11494882B2
公开(公告)日：2022-11-08
申请号：US16709099
申请日：2019-12-10
Applicant: Light Blue Optics Ltd.
Inventor： Raul Benet Ballester , Eyal Katz , Barak Maoz , Adrian James Cable , Euan Christopher Smith , Gareth John McCaughan , Shane Thornton
Abstract: An image capture system comprises a camera configured to capture an image of a whiteboard, or similar, viewed from an acute angle. A linear polarizer has a surface substantially perpendicular to a plane of the board and an axis of polarization substantially perpendicular to the plane of the board or within 30° of the perpendicular to the plane of the board. The camera is configured to capture the image of the board through the polarizer. A normal to the polarizer is directed in a different direction to a direction defined by an optic axis of the camera.
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公开(公告)号：US10540755B2
公开(公告)日：2020-01-21
申请号：US15550732
申请日：2016-02-12
Applicant: Light Blue Optics Ltd.
Inventor： Raul Benet Ballester , Eyal Katz , Barak Maoz , Adrian James Cable , Euan Christopher Smith , Gareth John McCaughan , Shane Thornton
Abstract: A method of capturing writing or drawing on a whiteboard comprises inputting camera data for a succession of image frames of the whiteboard, and processing data from said image frames to remove parts of the image frames corresponding to parts of a user or user pen writing or drawing on the whiteboard. The processing involves filtering to distinguish between i) motion of the user/user pen parts in the image frames, and ii) writing/drawing image information in the image frames which appears or changes during said writing or drawing but which is thereafter substantially unchanging. The filtered data defines captured writing or drawing from the whiteboard.
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