Picture projecting apparatus for a projection display system and the method thereof
First Claim
1. A picture projecting method for a projection display system comprising the steps of:
- multiplying a speed of each of video signals for converting red, green and blue color video signals into serial color video signals having a predetermined multiplied speed;
converting said serial color video signals to light signals each having a light wavelength corresponding to each of the red, green and blue color video signals via a monochrome picture tube;
separating a red, green and blue monochrome component signals from said converted light signals; and
focusing said separated red, green and blue component signals on a screen.
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Accused Products
Abstract
A picture projecting apparatus for a projection display system and the method thereof are disclosed. The apparatus converts color video signals which are red, green and blue colors arranged in series, to light signals which have the wavelengths of the light corresponding to the respective red, green and blue colors for a vertical scanning line, separates the red, green and blue monochromatic component lights from the converted light signals, and focuses the separated red, green and blue component lights. Accordingly, the red, green and blue color video signals converted to have a triple speed is scanned to a monochrome picture tube, to separate and reflect the light signal generated from the monochrome picture tube into red, green and blue component signals through dichroic mirrors and mirrors. At this time, according to input synchronizing signals of the red, green and blue video signals, electronic liquid crystal shutters, respectively composed of a single pixel, are driven to select separated red, green and blue component signals and focus through a lens thereby being projected on a large color screen of high resolution.
26 Citations
18 Claims
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1. A picture projecting method for a projection display system comprising the steps of:
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multiplying a speed of each of video signals for converting red, green and blue color video signals into serial color video signals having a predetermined multiplied speed; converting said serial color video signals to light signals each having a light wavelength corresponding to each of the red, green and blue color video signals via a monochrome picture tube; separating a red, green and blue monochrome component signals from said converted light signals; and focusing said separated red, green and blue component signals on a screen. - View Dependent Claims (2)
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3. A picture projecting method for a projection display system comprising the steps of:
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converting a speed of each of a red, green and blue color video signal including synchronizing signals to a tripled speed in accordance with a predetermined control signal generated from a horizontal synchronizing signal by a PLL method, to output the converted signals in series; separating a vertical and horizontal synchronizing signals from said red, green and blue signals with said triple speed output from said triple speed converting step; receiving, in series, said red, green and blue video signals with said tripled speed from said tripled speed converting step, deflecting said received signals according to the vertical and horizontal signals output from said synchronizing signal separating step, and displaying said deflected signals in monochrome on a monochrome picture tube; selectively separating and reflecting a red, green and blue component signals according to light wavelengths, from a monochromatic light signal displayed in said displaying step; selecting said separated red, green and blue component signals from said separating and reflecting step in response to a predetermined control signal supplied from said tripled-speed converting step to selectively transmit said red, green and blue component signals; and focusing and mixing said red, green and blue component signals selected in said selecting step to magnify and project said composite signals on a screen by controlling a focusing magification factor.
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4. A picture projecting apparatus for a projection display system comprising:
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phase locked loop circuit means for generating variable frequency synchronization signals in response to a horizontal synchronizing signal input thereto; tripled video signal generating means for receiving red, green and blue video signals and generating a tripled video signal being a composite video signal representation of said red, green and blue video signals, said tripled video signal being generated in response to the variable frequency synchronization signals output from said phase locked loop circuit means; synchronous detection means for receiving the tripled video signal from said tripled video signal generating means and generating vertical and horizontal deflection signals in response thereto; a picture tube having an electron gun for receiving the tripled video signal from said tripled video signal generating means and the vertical and horizontal deflection signals from said synchronous detection means and generating red, green and blue monochromatic light signals in response thereto; a shutter driver circuit responsive to decoding signals from said tripled video signal generating means for generating shutter driver switching control signals; a plurality of electronic shutter means, each electronic shutter means for sequentially passing respective red, green and blue monochromatic light signals from said picture tube in response to a corresponding shutter driver switching control signal from said shutter driver circuit; a first set of mirrors for reflecting each respective red, green and blue monochromatic light onto a corresponding one of said plurality of electronic shutter means; and a second set of mirrors for reflecting monochromatic light signals, sequentially passed from said plurality of electronic shutter means, onto a focusing lens, said focusing lens projecting each transmitted monochromatic light signal onto a large color screen. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A method for projecting a color image on a screen of a projection display system comprising the steps of:
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generating variable frequency synchronization signals in response to a horizontal synchronizing signal; receiving red, green and blue video signals and generating, in response to decoding signals, a tripled video signal being a composite video signal representation of said red, green and blue video signals, said tripled video signal being generated in response to the variable frequency synchronization signals and the decoding signals; receiving the tripled video signal and generating vertical and horizontal deflection signals in response thereto; receiving the tripled video signal and the vertical and horizontal deflection signals and generating red, green and blue monochromatic light signals in response thereto; generating shutter driver switching control signals in response to the decoding signals; transmitting the shutter driver switching signals to a plurality of electronic shutter means, each electronic shutter means for sequentially passing respective red, green and blue monochromatic light signals in response to a corresponding shutter driver switching control signal; using a first set of mirrors to reflect each respective red, green and blue monochromatic light onto a corresponding one of said plurality of electronic shutter means; and using a second set of mirrors to reflect monochromatic light signals, sequentially passed from said plurality of electronic shutter means, onto a focusing lens, said focusing lens projecting each transmitted monochromatic light signal onto a large color screen. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A picture projecting display system comprising:
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means for multiplying a speed of each of video signals for converting red, green and blue color video signals into serial color video signals having a predetermined multiplied speed; means for converting said serial color video signals to light signals each having a light wavelength corresponding to each of the red, green and blue color video signals via a monochrome picture tube; means for separating a red, green and blue monochrome component signals from said converted light signals; and means for focusing said separated red, green and blue component signals on a screen. - View Dependent Claims (17)
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18. A picture projecting display system comprising:
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means for converting a speed of each of a red, green and blue color video signal including synchronizing signals to a tripled speed in accordance with a predetermined control signal generated from a horizontal synchronizing signal by a PLL method, to output the converted signals in series; means for separating a vertical and horizontal synchronizing signals from said red, green and blue signals with the tripled speed output from said converting means; display means for receiving, in series, said red, green and blue video signals with said tripled speed from said converting means, deflecting said received signals according to the vertical and horizontal signals output from said separating means, and displaying said deflected signals in monochrome on a monochrome picture tube; means for selectively separating and reflecting a red, green and blue component signals according to light wavelengths, from a monochromatic light signal displayed in said displaying means; means for selecting said separated red, green and blue component signals from said display means in response to a predetermined control signal supplied from said converting means to selectively transmit said red, green and blue component signals; and means for focusing and mixing said red, green and blue component signals selected in said selecting means to magnify and project said composite signals on a screen by controlling a focusing magnification factor control means.
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Specification