LIQUID-CRYSTAL TELEVISION DISPLAY SYSTEM

• US 3,716,658 A
• Filed: 04/09/1970
• Issued: 02/13/1973
• Est. Priority Date: 06/13/1967
• Status: Expired due to Term

• Current Assignee: Michael I. Rackman
• Original Assignee: Michael I. Rackman
• Inventors: Rackman, Michael I.
• Primary Examiner(s): Richardson, Robert L.
• Application Number:
  US05/027,097
• Time in Patent Office: 1,041 Days
• Field of Search: 178/7.3D 315/169TV,169R 340/166
• US Class Current: 348/792
• CPC Class Codes: H04N 3/127 using liquid crystals

Abstract

A television system having a horizontal and vertical arrays of parallel conductors with a liquid crystal film interposed between them. The vertical conductors are connected at spaced intervals to a delay line having a delay sufficient for the delay line to represent an entire line of the picture signal. Successive lines of the video signal are fed into the right end of the delay line. The signal travels down the delay line to the left end. Just at the instant when a complete line of the picture signal is within the delay line between the leftmost and the rightmost vertical conductors, one of the horizontal conductors is momentarily energized. This causes a complete line of the picture signal to be displayed. The horizontal conductors are sequentially energized to form the complete display. Each line of the display is formed as a unit at the end of the reception of a complete line of the video singal.

Claims

1. A liquid-crystal display system comprising a first array of parallel conductors, a second array of parallel conductors forming a grid with said first array of parallel conductors, a liquid-crystal film interposed between the conductors in said arrays, a delay line, the conductors in said first array being coupled to said delay line at spaced intervals therealong, means for sequentially applying lines of information signals to be displayed to one end of said delay line, and means for sequentially and momentarily energizing the conductors in said second array, said means for sequentially and momentarily energizing the conductors in said second array energizing one of said conductors at a time when a complete line of information signal appears in said delay line between the first and last conductors in said first array coupled therealong, and energizing said one conductor in said second array for only a small fraction of the time required for a signal to travel through said delay line.

2. A liquid-crystal display system in accordance with claim 1 wherein said means for sequentially and momentarily energizing the conductors in said second array includes an additional delay line having said conductors in said second array coupled therealong at spaced intervals, and means for applying to one end of said additional delay line an electrical pulse.

3. A liquid-crystal display system in accordance with claim 1 wherein said means for sequentially and momentarily energizing the conductors in said second array includes a counter having a plurality of stages each coupled to one of the conductors in said second array for sequentially and momentarily applying pulses thereto.

4. A liquid-crystal display system in accordance with claim 1 further including means for amplifying said information signals prior to the application thereof to said delay line, said amplifying means having an amplification characteristic for tapering off the amplification of each line of information signal from the initial portion to the terminal portion thereof.

5. A display system comprising a first array of parallel conductors, a second array of parallel conductors forming a grid with said first array of parallel conductors, a light-controlling film interposed between the conductors in said arrays, a delay line, the conductors in said first array being coupled to sAid delay line at spaced intervals therealong, means for sequentially applying lines of information signals to be displayed to one end of said delay line, and means for sequentially and momentarily energizing the conductors in said second array, said means for sequentially and momentarily energizing the conductors in said second array energizing one of said conductors at a time when a complete line of information signal appears in said delay line between the first and last conductors in said first array coupled therealong, and energizing said one conductor in said second array for only a small fraction of the time required for a signal to travel through said delay line.

6. A display system in accordance with claim 5 wherein said means for sequentially and momentarily energizing the conductors in said second array includes an additional delay line having said conductors in said second array coupled therealong at spaced intervals, and means for applying to one end of said additional delay line an electrical pulse.

7. A display system in accordance with claim 5 wherein said means for sequentially and momentarily energizing the conductors in said second array includes a counter having a plurality of stages each coupled to one of the conductors in said second array for sequentially and momentarily applying pulses thereto.

8. A display system in accordance with claim 5 further including means for amplifying said information signals prior to the application thereof to said delay line, said amplifying means having an amplification characteristic for tapering off the amplification of each line of information signal from the initial portion to the terminal portion thereof.

9. A liquid-crystal display system comprising a first array of parallel conductors, a second array of parallel conductors forming a grid with said first array of parallel conductors, a liquid-crystal film interposed between the conductors in said arrays, a delay line, the conductors in said first array being coupled to said delay line at spaced intervals therealong, means for sequentially applying lines of information signals to be displayed to one end of said delay line, and means for momentarily electrically coupling all of the conductors in said first array to successive individual conductors in said second array, said coupling means being operative at times when a complete line of information signal appears in said delay line between the first and last conductors in said first array coupled therealong and for only a small fraction of the time required for a signal to travel through said delay line.

10. A liquid-crystal display system in accordance with claim 9 wherein said coupling means includes an additional delay line having said conductors in said second array coupled therealong at spaced intervals, and means for applying to one end of said additional delay line an electrical pulse.

11. A liquid-crystal display system in accordance with claim 9 wherein said coupling means includes a counter having a plurality of stages each coupled to one of the conductors in said second array for sequentially and momentarily applying pulses thereto.