INKING BUFFER FOR FLAT-PANEL DISPLAY CONTROLLERS

    公开(公告)号:CA2056727C

    公开(公告)日:1996-01-02

    申请号:CA2056727

    申请日:1991-11-29

    Applicant: IBM

    Abstract: An intelligent subsystem separately supports inking functions in order to allow stroke-ignorant software to be supported in a stylus driven environment. This subsystem thus provides the inking capability missing in existing flat-panel display controllers. Separate inking functions are incorporated into the subsystem in order to support inking management functions which do not corrupt the display refresh buffer as it is understood by existing application software. The subsystem makes no assumptions about the application's awareness of stroke data as an input modality. Instead, the subsystem assumes that a conventional display subsystem also exists in the system. The subsystem utilizes the strobes and clocks generated by the conventional display controller to generate addresses in a memory which has physically separate address and strobe lines from the display refresh buffer. The content of this added memory is used to control the source of input to the data lines of the display. The invention can be generalized to allow any number of planes to be added to a display system providing access to that display system by any number of asynchronous processes such as inking.

    PLANAR SOLID STATE LASER ARRAY
    4.
    发明专利

    公开(公告)号:CA1073997A

    公开(公告)日:1980-03-18

    申请号:CA268531

    申请日:1976-12-22

    Applicant: IBM

    Abstract: PLANAR SOLID STATE LASER ARRAY An array of collimated wide aperture electrically pumped leaky corrugated AlGaAs optical waveguide lasers is formed on a single chip by etching a series of grooves oriented with respect to the crystalographic planes to isolate discrete lasers in the array and provide the requisite orientation of the internal reflecting surfaces to support the lasing action. The corrugation period is chosen such that the laser radiation exits from the array in a direction normal to the plane of waveguide.

    HANDWRITING RECOGNITION BY CHARACTER TEMPLATE

    公开(公告)号:CA2061076A1

    公开(公告)日:1992-10-20

    申请号:CA2061076

    申请日:1992-02-12

    Applicant: IBM

    Abstract: YO9-90-178 A method for entry and recognition of elements from a set of symbols, involving a template of line segments displayed on an electronic writing surface. A stylus is applied to the electronic writing surface so as to trace a desired symbol. Computing means are used to "snap" the strokes made by the stylus onto the corresponding template line segments. Upon completion of a symbol, a code is made to represent the line segments and this code is used to reference entries in a data structure to identify the appropriate corresponding computer code. If there is no match, the code for the line segments and a corresponding set of computer codes can be added to the table. This method takes advantage of natural handwriting skills and can be used for a variety of symbol sets.

    INKING BUFFER FOR FLAT-PANEL DISPLAY CONTROLLERS

    公开(公告)号:CA2056727A1

    公开(公告)日:1992-07-18

    申请号:CA2056727

    申请日:1991-11-29

    Applicant: IBM

    Abstract: An intelligent subsystem separately supports inking functions in order to allow stroke-ignorant software to be supported in a stylus driven environment. This subsystem thus provides the inking capability missing in existing flat-panel display controllers. Separate inking functions are incorporated into the subsystem in order to support inking management functions which do not corrupt the display refresh buffer as it is understood by existing application software. The subsystem makes no assumptions about the application's awareness of stroke data as an input modality. Instead, the subsystem assumes that a conventional display subsystem also exists in the system. The subsystem utilizes the strobes and clocks generated by the conventional display controller to generate addresses in a memory which has physically separate address and strobe lines from the display refresh buffer. The content of this added memory is used to control the source of input to the data lines of the display. The invention can be generalized to allow any number of planes to be added to a display system providing access to that display system by any number of asynchronous processes such as inking.

Patent Agency Ranking