Microprocessor controlled monitor
First Claim
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1. In combination in a microprocessor controlled monitor, comprising:
- a. input means for receiving of a video signal having a particular timing format including horizontal and vertical timing signals for control of a raster scan based output,b. digital random access memory means for receiving and storing a plurality of designated and distinct timing format parameters, including an addressable timing signature, at discrete memory locations,c. said microprocessor means for calculating said timing signature based on said timing signals for said received video signal;
d. said microprocessor means for comparing the signature of the received video signal with the signatures stored in said discrete memory locations,e. deflection control means including a horizontal DAC and a vertical DAC for receiving timing format parameters from said digital random access memory means and driving horizontal and vertical deflection yokes in response thereto, andf. said microprocessor means in communication with said deflection control means and random access memory means capable of operating in at least two separate modes, including an operation mode characterized by comparing and loading previously stored timing format parameters for the control of said DACs for driving said deflection yokes, and a calibration mode for quantifying specific timing format parameters associated with a received video signal having a signature that does not match any stored signature values in said memory and storage of the quantified specific timing format.
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Abstract
A display monitor capable of providing fully synchronized image display in response to an incoming video signal having a range of possible timing formats. The monitor employs a microprocessor that discriminates between the disparate horizontal and vertical sync signals by developing a characteristic signature of the timing format and thereafter searching a resident database of different formats to discern a match. A calibration mode is provided to allow the adjustment of the monitor to an incoming signal that is otherwise unrecognized by the microprocessor or to allow the updating of previously stored information.
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Citations
11 Claims
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1. In combination in a microprocessor controlled monitor, comprising:
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a. input means for receiving of a video signal having a particular timing format including horizontal and vertical timing signals for control of a raster scan based output, b. digital random access memory means for receiving and storing a plurality of designated and distinct timing format parameters, including an addressable timing signature, at discrete memory locations, c. said microprocessor means for calculating said timing signature based on said timing signals for said received video signal; d. said microprocessor means for comparing the signature of the received video signal with the signatures stored in said discrete memory locations, e. deflection control means including a horizontal DAC and a vertical DAC for receiving timing format parameters from said digital random access memory means and driving horizontal and vertical deflection yokes in response thereto, and f. said microprocessor means in communication with said deflection control means and random access memory means capable of operating in at least two separate modes, including an operation mode characterized by comparing and loading previously stored timing format parameters for the control of said DACs for driving said deflection yokes, and a calibration mode for quantifying specific timing format parameters associated with a received video signal having a signature that does not match any stored signature values in said memory and storage of the quantified specific timing format. - View Dependent Claims (2, 3, 4, 5)
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6. In a microprocessor system for controlling a raster scan process on a display monitor, comprising:
- video signal receiving means for reception of a composite video signal having image information and raster scan controlling sync information;
microprocessor means for determining a sync signal signature from said received video signal and comparing said signature with a plurality of stored sync signal signatures;
timing format parameter retrieval means for retrieving timing format parameters from memory means corresponding to a sync signal signature that matches said sync signal signature of said received video signal;
raster scan control means for controlling said raster scan process by applying said matching timing format parameters to horizontal and vertical deflection circuits; and
calibration means in communication with said microprocessor means for adjusting selected timing format parameters that are associated with a sync signal signature that fails to match any stored sync signal signatures, wherein said calibration means permits selected adjustment of horizontal size/width, horizontal position, vertical size/height, and vertical position associated with said raster scan process. - View Dependent Claims (7, 8)
- video signal receiving means for reception of a composite video signal having image information and raster scan controlling sync information;
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9. A microprocessor controlled process for synchronizing a display monitor to an incoming video signal having a range of possible horizontal scanning frequencies between about 15 KHz to about 75 KHz, comprising the steps of:
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a. receiving said incoming video signal; b. determining a timing signature associated with said incoming video signal, wherein said signature is a compilation of horizontal scan rate and vertical frame rate data; c. comparing said determined timing signature with a plurality of stored timing signatures which designate address locations, for storing discrete timing format parameters; d. retrieving timing format parameters associated with a stored timing signature that matches said determined timing signature; e. applying said selected timing format parameters to control a raster scan projection of said incoming video signal; and f. providing the capability to (i) calibrate said display monitor by adjusting selected timing format parameters, including horizontal position and width and vertical position and height, and (ii) thereafter storing the adjusted selected timing format parameters after calibration. - View Dependent Claims (10, 11)
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Specification