US5990858A — Flat panel display terminal for receiving multi-f…

Claim 1

Independent Claim 69 words

A method for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor comprising: receiving analog video signals; extracting synchronization signals from said analog video signals; measuring a frequency of said synchronization signals; determining a display protocol of said analog video signals based on said frequency; retrieving predetermined parameters of said display protocol; and programming said flat panel display terminal based on said parameters.

Claim 2

Independent Claim 69 words

A method for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor comprising: receiving analog video signals; extracting synchronization signals from said analog video signals; measuring a frequency of said synchronization signals; determining a display protocol of said analog video signals based on said frequency; retrieving predetermined parameters of said display protocol; and programming said flat panel display terminal based on said parameters.

Claim 3

Dependent Claim 20 words

The method defined in claim 1, wherein said extracting step comprises the step of recovering horizontal and vertical synchronization signals.

Claim 4

Dependent Claim 49 words

The method defined in claim 2 wherein said measuring step comprises the steps of: determining a sense of said vertical synchronization signals; counting a number of horizontal lines between a first vertical synchronization signal and a second vertical synchronization signal in sequence; and setting said number as said frequency.

Claim 5

Dependent Claim 41 words

The method defined in claim 1 wherein the determining step comprises the steps of: accessing a database having said predetermined parameters for a plurality of said display protocols; and identifying said display protocol with the closest predetermined parameters to said frequency.

Claim 6

Dependent Claim 31 words

The method defined in claim 4, further comprising the steps of: dividing said frequency by a predetermined number; and comparing said divided frequency with said predetermined parameters of said display protocol.

Claim 7

Dependent Claim 36 words

The method defined in claim 1, wherein said extracting step comprises the steps of: determining a type of synchronization encoding; identifying encoded signals based on said type; and decoding said encoded signals into said synchronization signals.

Claim 8

Dependent Claim 44 words

The method of claim 1 wherein said programming step comprises the steps of: programming an analog liquid crystal display panel of said flat panel display terminal with said parameters; and programming a phase-locked loop of said flat panel display terminal for a suitable frequency.

Claim 9

Dependent Claim 36 words

The method of claim 7 wherein said programming step of said analog liquid crystal display panel comprises the steps of: storing horizontal and vertical position parameters; storing a horizontal width parameter; and storing a brightness parameter.

Claim 10

Dependent Claim 37 words

The method defined in claim 1 further comprising the steps of: detecting an input from at least one push-button; adjusting said parameters based on said input; storing said adjusted parameters; and reprogramming said flat panel display terminal.

Claim 11

Independent Claim 131 words

A method for enabling a flat panel display terminal to simulate operation of a multifrequency cathode-ray tube monitor comprising the steps of: receiving analog video signals; extracting color signals and vertical and horizontal synchronization signals from said analog video signals; determining a sense of said vertical signals; counting a number of said horizontal lines between a frame defined by said vertical signals; looking up default parameters for a plurality of display protocols; identifying one of said display protocols with the default parameters that are the closest to said counted number; retrieving said default parameters for said display protocol; programming a liquid crystal display panel of said flat panel display terminal based on said default parameters; and programming a phase-locked loop of said flat panel display terminal based on said default parameters.

Claim 12

Independent Claim 131 words

A method for enabling a flat panel display terminal to simulate operation of a multifrequency cathode-ray tube monitor comprising the steps of: receiving analog video signals; extracting color signals and vertical and horizontal synchronization signals from said analog video signals; determining a sense of said vertical signals; counting a number of said horizontal lines between a frame defined by said vertical signals; looking up default parameters for a plurality of display protocols; identifying one of said display protocols with the default parameters that are the closest to said counted number; retrieving said default parameters for said display protocol; programming a liquid crystal display panel of said flat panel display terminal based on said default parameters; and programming a phase-locked loop of said flat panel display terminal based on said default parameters.

Claim 13

Dependent Claim 41 words

The method defined in claim 10, wherein said extracting step comprises the steps of: determining a video mode for encoding said analog video signals; and decoding said analog video signals into said vertical and horizontal signals based on said video mode.

Claim 14

Dependent Claim 57 words

The method defined in claim 10, further comprising the steps of: detecting an input from a plurality of buttons; adjusting said parameters including horizontal and vertical positions, a horizontal width and brightness based on said input; storing said adjusted parameters; and reprogramming an analog liquid crystal display and a phase-locked loop of said flat panel display terminal.

Claim 15

Dependent Claim 33 words

The method defined in claim 10, further comprising the step of powering down a backlight of said liquid crystal panel when said video signals are not detected for a predetermined period of time.

Claim 16

Dependent Claim 39 words

The method defined in claim 10, further comprising the step of powering down a backlight of said liquid crystal panel when said counted number of said horizontal lines goes beyond a display capability of said liquid crystal display panel.

Claim 17

Dependent Claim 20 words

The method defined in claim 10, wherein said display protocols include VGA, SVGA, XGA, TEXT 1 and TEXT 2 protocols.

Claim 18

Dependent Claim 122 words

A circuit for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor comprising: circuitry for receiving analog video signals and extracting color signals and synchronization signals from said analog video signals; an analog liquid crystal display panel connected to said circuitry; a phase-locked loop connected to said circuitry and said analog liquid crystal display panel; and a microprocessor connected to said circuitry, said analog liquid crystal display panel and said phase-locked loop for measuring a frequency of said synchronization signals, determining a display protocol of said analog video signals based on said frequency, retrieving predetermined parameters for said display protocol and programming said analog liquid crystal display panel and said phase-locked loop based on said parameters.

Claim 19

Dependent Claim 122 words

A circuit for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor comprising: circuitry for receiving analog video signals and extracting color signals and synchronization signals from said analog video signals; an analog liquid crystal display panel connected to said circuitry; a phase-locked loop connected to said circuitry and said analog liquid crystal display panel; and a microprocessor connected to said circuitry, said analog liquid crystal display panel and said phase-locked loop for measuring a frequency of said synchronization signals, determining a display protocol of said analog video signals based on said frequency, retrieving predetermined parameters for said display protocol and programming said analog liquid crystal display panel and said phase-locked loop based on said parameters.

Claim 20

Dependent Claim 34 words

The circuit defined in claim 16 further comprising a brightness controller connected to said microprocessor and said analog liquid crystal display panel for controlling a brightness of backlights of said liquid crystal display panel.

Claim 21

Dependent Claim 27 words

The circuit defined in claim 16 further comprising a sync-stripper for decoding horizontal and vertical synchronization signals from encoded synchronization signals included in said analog video signals.

Claim 22

Dependent Claim 16 words

The circuit defined in claim 16 further comprising at least one button for adjusting said parameters.

Claim 23

Dependent Claim 25 words

The circuit defined in claim 19 wherein said parameters include horizontal and vertical positions, horizontal width and brightness of said analog liquid crystal display panel.

Claim 24

Dependent Claim 23 words

The circuit defined in claim 16 wherein standard parameters for said display protocols are stored as said predetermined parameters in a read-only memory.

Claim 25

Dependent Claim 33 words

The circuit defined in claim 21 wherein user-adjusted parameters are stored as said predetermined parameters in an electrically erasable programmable read-only memory, said user-adjusted parameter superseding said standard parameters as said predetermined parameters.

Claim 26

Dependent Claim 26 words

The circuit defined in claim 16 further comprising a control application specific integrated circuit for protecting said analog liquid crystal display panel from a power overflow.

Claim 27

Independent Claim 116 words

An apparatus for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor comprising: means for receiving analog video signals; means for extracting color signals and synchronization signals from said analog video signals; an analog liquid crystal display for receiving said color signals and said synchronization signals; means connected to said analog liquid crystal display for receiving said synchronization signals and providing clock signals; and means connected to said extracting means for measuring a frequency of said synchronization signals, determining a display protocol of said video signals based on said frequency, retrieving predetermined parameters for said display protocol, and programming said analog liquid crystal display and said clock signal providing means.

Claim 28

Independent Claim 116 words

An apparatus for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor comprising: means for receiving analog video signals; means for extracting color signals and synchronization signals from said analog video signals; an analog liquid crystal display for receiving said color signals and said synchronization signals; means connected to said analog liquid crystal display for receiving said synchronization signals and providing clock signals; and means connected to said extracting means for measuring a frequency of said synchronization signals, determining a display protocol of said video signals based on said frequency, retrieving predetermined parameters for said display protocol, and programming said analog liquid crystal display and said clock signal providing means.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	2002-11-22	2003-05-24	2003-11-23	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	2006-11-22	2007-05-24	2007-11-23	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	2010-11-22	2011-05-24	2011-11-23	$7700.00	Window Closed / Lapsed

Flat panel display terminal for receiving multi-frequency and multi-protocol video signals

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