The invention concerns device for a digital writing instrument the device comprising a substrate with a transparent or translucent layer and a pattern layer on the transparent layer. The pattern comprising an active area made with photoluminescent material and an inactive area made with non photoluminescent material. The photoluminescent material comprises a successive alternate of a first layer and a second layer generating photoluminescent structure at the interface of said first layer and said second layer, the pattern layer comprises a series of N points distributed in a plan (X,Y), either said N-points define the active area whereas the inactive area is defined by the area between said N points. The N-points defines the inactive area whereas the active area is defined by the area between said N points. The invention also relates to a method for determining a position, a method for manufacturing, a system and a stylus.

Multi-axis self-location method and apparatus wherein de Bruijn sequences on 2 or more axes are convolved into an array of symbols such as halftone dots to form a reference scale. The position of an imaging device such as a camera relative to the reference scale is ascertained from the captured camera image by bit-wise reconstitution of axis position codes with simple, predominantly linear operations over small neighbourhoods. Judicious choice of differential coding, LFSR generator polynomials, mathematical operators, and deconvolution kernels enables code digits of an axis to be regenerated while simultaneously cancelling out the contributions of other axes. Also optionally provided are uniform DC-balanced variants yielding greatly improved position interpolation, isometric implementations decodable from high-aspect-ratio sample windows, robust concatenated error correction, and extensions into n-space.

The present disclosure relates to a smart pen and a display device using the same, in which a reflective light reception rate may be enhanced through a light output structure to increase a code pattern and code information recognition rate of a display panel. According to an embodiment of the disclosure, smart pen comprising a body portion, a pen tip portion formed on one end of the body portion to form a path of light emitted from a light emitting portion in an end direction at one side, a code detector detecting shape data for code patterns by applying light to the pen tip portion and receiving light reflected from a display panel and the pen tip portion, and a code processor generating coordinate data by using the shape data and transmitting the coordinate data to a main processor for driving the display panel.

A writing system that includes a reusable notebook including a sheet having a working surface. The working surface includes a printed code including an operative control. The writing system includes a writing instrument configured to capture images of the printed code and a computing device configured to communicate with the reusable notebook and/or the writing instrument. The sheet includes a porous surface located in the working surface. A writing material of the writing instrument comprises solid particles having a particle size greater than a porosity of the porous surface.

An optical touch display device which is advantageous in high-speed driving, large-area touch sensing, and multi-touch sensing because of use of an image map and which can improve touch sensing performance and a driving method thereof are provided. The optical touch display device includes a display device configured to display a display image based on input source image data and an image map for touch sensing, an optical touch pen configured to detect map information of the image map displayed on the display device, and a position detector configured to detect position information (coordinate information) on a screen based on the map information.

The present invention discloses a method for producing graphical indicators and interactive systems for utilizing the graphical indicators. On the surface of an object, visually negligible graphical indicators are provided. The graphical indicators and main information, i.e. text or pictures, co-exist on the surface of object. The graphical indicators do not interfere with the main information when the perception of human eyes are concerned. With the graphical indicators, further information other than the main information on the surface of object are carried. In addition to the main information on the surface of object, one is able to obtain additional information through an auxiliary electronic device or trigger an interactive operation.

There is provided an information processing apparatus to detect various motions of a user and generate useful information utilizing the result, the information processing apparatus including: a motion detection unit configured to detect a series of motions of a user which are repetitive and nonperiodic; and an information generation unit configured to generate information related to the series of motions.

A flexure guidance system may be provided for controlling movement of an optical subassembly and/or a connected combiner lens. For instance, the flexure guidance system may include a distal end piece, a proximal end piece, and multiple wire flexures that link the distal end piece to the proximal end piece. The linking wire flexures may be spaced to form an interior cavity between the distal end piece and the proximal end piece. This interior cavity may house various electronic components. One or more actuators in the system may move the electronic components according to input signals along different axes of movement provided by the wire flexures. Various other methods, systems, and computer-readable media are also disclosed.

A digitizer system includes a substrate with indicia having photoluminescent features that uniquely define local areas of the substrate. A sensor device, such as a stylus, may sense radiation emitted from the features, and a controller may determine therefrom the location of the stylus relative to the substrate.

An optical navigation device, comprising: an optical sensor, configured to sense optical data; and a processing circuit, configured to compute motions of the optical navigation device based on the optical data, and configured to output the motions, wherein a first CPI is set to the processing circuit. The processing circuit receives a calibration command to calibrate the first CPI to a second CPI, wherein the second CPI is computed via following steps: (a) computing a real CPI corresponding to times of motions output by the processing circuit during a time interval that a relative displacement between the optical navigation device and a surface reaches a first predetermined distance; (b) computing a ratio between the real CPI and the first CPI or a difference between the real CPI and the first CPI; and (c) generating the second CPI based on the ratio or the difference.