Liquid crystal display device video having signal driving circuit mounted on one side

Abstract

Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.

1. A liquid crystal display device comprising:
 a liquid crystal display panel including an upper shield casing accommodating at least one insulating substrate and having at least first and second sides, and a lower casing being connectable to the upper shield casing, the lower casing having at least first and second sides with one of the first side of the upper shield casing and the lower casing being provided with hooks and the other of the first side of the upper shield casing and the lower casing being provided with projections for receiving the hooks and enabling connection of the upper shield casing and the lower casing, and one of the second side of the upper shield casing and the lower casing having fixing pawls and the other of the second side of the upper shield casing and the lower casing having recesses for receiving the fixing pawls so as to enable connection of the upper shield casing and the lower casing.    
     
     
       2. A liquid crystal display device according to  claim 1 , wherein the upper shield casing accommodates first and second insulating substrates superposed at a predetermined gap such that faces thereof are respectively formed with electrodes and an orientation film and are opposed to each other, in which said two substrates are adhered to each other through a seal member applied in a frame shape on edge portions between said two substrates while sealing a liquid crystal in said seal member between said two substrates, and in which a plurality of scanning signal lines and video signal lines arrayed on a surface of said first insulating substrate have their individual terminals disposed outside of said seal member; and
 wherein a video signal line driving circuit substrate is arranged on only one longer sides of said liquid crystal display panel and is connected with the terminals of said video signal lines.    
     
     
       3. A liquid crystal display device according to  claim 2 ,
 wherein no circuit substrate is arranged at the other side of said display panel which is arranged with said video signal line driving circuit substrate.    
     
     
       4. A liquid crystal display device according to  claim 2 ,
 a light guide plate arranged below said liquid crystal display panel,    a fluorescent tube arranged in the vicinity of at least one side face of said light guide plate,    and a plurality of tape carrier packages arranged on the outer peripheral portion of said liquid crystal display panel;    wherein said fluorescent tube is arranged below said plurality of tape carrier packages.    
     
     
       5. A liquid crystal display device according to  claim 1 , wherein at least one of the upper shield casing and the lower casing accommodate a backlight therein and disassembly of a connected upper shield casing and lower casing for repair of the backlight is enabled by removing a portion of the fixing pawls. 
     
     
       6. A liquid crystal display device according to  claim 1 , wherein the first and second sides are arranged on opposite sides of the upper shield casing and the lower casing. 
     
     
       7. A liquid crystal display device according to  claim 1 , wherein at least one circuit substrate is accommodated in at least one of the upper shield casing and the lower casing and no circuit substrate is arranged in the first side of the upper shield casing and the lower casing. 
     
     
       8. A liquid crystal display device comprising:
 a first circuit substrate arranged outside of a first side of a liquid crystal display panel for driving signal lines,    a second circuit substrate arranged outside of a second side adjacent to and perpendicular to said first side and having a connector for connection with the outside,    a first casing having a first mounting hole in the vicinity of its corner for accommodating said liquid crystal display panel and said first and second circuit substrates,    a back light disposed with respect to said liquid crystal display panel,    and a second casing having a second mounting hole aligned with said first mounting hole for accommodating said back light;    wherein said first casing and said second casing are united together, said second circuit substrate is equipped with an electronic part disposed at its end portion most remote from said first circuit substrate, said connector of said second circuit substrate is arranged adjacent to said electronic part and extends in a direction substantially parallel to said second side;    a plurality of circuit substrates divided and arranged at the two, three or four sides of an outer peripheral portions of said liquid crystal display panel,    and a casing for accommodating said liquid crystal display panel and said circuit substrates together and formed with mounting holes,    wherein at least one of said mounting holes is arranged at a distance from a corner of said casing, and in that said circuit substrate having a generally rectangular shape with corners are divided into a plurality of sheets and are electrically connected in a vicinity of said corners by joiners.    
     
     
       9. A liquid crystal display device according to  claim 8 ,
 wherein said mounting holes are positioned at intermediate portions spaced at a predetermined distance from the corners of said casing and in a drawn portion which is made integral with a metal plate forming said casing and which forms a parallel plane at a different level as that of said metal plate,    said drawn portion is given generally a quadrant shape,    said quadrant shape is formed with a notch in its radial portion between said drawn portion and said metal plate adjacent to said drawn portion.    
     
     
       10. A liquid crystal display device according to  claim 8 ,
 wherein said circuit substrates are electrically connected with each other through at least two joiners which are superposed at two or more stages in a thickness direction of said display device.    
     
     
       11. A liquid crystal display device comprising:
 a first circuit substrate arranged outside of a first side of a liquid crystal display panel for driving signal lines,    a second circuit substrate arranged outside of a second side adjacent to and perpendicular to said first side and having a connector for connection with the outside, and a signal source integrated circuit,    a first casing having a first mounting hole in a vicinity of a corner for accommodating said liquid crystal display panel and said first and second circuit substrates,    and a second casing having a second mounting hole aligned with said first mounting hole for uniting said first casing;    wherein said connector disposed between said first circuit substrate and said signal source integrated circuit, said connector of said second circuit substrate is arranged adjacent to said signal source integrated circuit and extends in a direction substantially parallel to said second side.    
     
     
       12. A liquid crystal display device comprising:
 a liquid crystal display panel having longer sides and shorter sides;    a video signal line driving circuit substrate connected to only one of said longer sides of said liquid crystal display panel;    a light guide plate arranged below said liquid crystal display panel;    a fluorescent tube arranged on at least one side face of said light guide plate;    a shield casing for accommodating the circumferential portion of said liquid crystal display panel;    a mold casing monolithically molded for accommodating said light guide plate and said fluorescent tube;    two cables having respective one ends thereof connected with two ends of said fluorescent tube;    first and second retaining members for retaining the two ends of said fluorescent tube, respectively; and    first, second and third grooves integral with said mold casing;    wherein said first and second grooves respectively accommodate said first and second retaining members so that said first and second retaining members are snugly fitted therein;    at least one of said two cables is accommodated in said third groove which is integral with a side wall of said mold casing;    said shield casing and said mold casing being coupled together; and    said third groove and said fluorescent tube being arranged to extend along one of said longer sides of said liquid crystal display panel.    
     
     
       13. A liquid crystal display device according to  claim 12 , wherein said third groove of said mold casing extends in a direction of extension of said fluorescent tube. 
     
     
       14. A liquid crystal display device according to  claim 12 , wherein said third groove of said mold casing is proximate to said fluorescent tube. 
     
     
       15. A display device comprising:
   a glass substrate having two longer sides and two shorter sides,        a plurality of scanning signal lines and a plurality of video signal lines formed on the glass substrate,        a thin film transistor connected to one of the plurality of scanning g lines and the video signal lines and formed on the glass substrate,        a scanning signal drive IC chip electrically connected to the plurality of scanning signal lines, and mounted on a first flexible wiring substrate bonded to the glass substrate,        a plurality of video signal drive IC chips electrically connected to the plurality of video signal lines, and mounted on a plurality of second flexible wiring substrates bonded to the glass substrate, and        a print circuit board bonded to the plurality of second flexible wiring substrates and electrically connected to the scanning drive IC chip;        wherein the scanning signal drive IC chip is supplied with a clock and a power from the print circuit board via the first flexible wiring substrate; and        wherein the plurality of video signal drive IC chips are arranged at only one longer side of the glass substrate.     
     
     
       16. The display device according to  claim 15 , wherein the scanning signal drive IC chip is arranged at only one shorter side of the glass substrate. 
     
     
       17. The display device according to  claim 16 , further comprising a metallic shield case,
   wherein the scanning signal drive IC chip and the plurality of video signal drive IC chips are covered by metallic shield case.     
     
     
       18. A display device comprising:
   a glass substrate having two longer sides and two shorter sides,        a plurality of scanning signal lines and a plurality of video signal lines formed on the glass substrate,        a thin film transistor connected to one of the plurality of scanning signal lines and the video signal lines and formed on the glass substrate,        a scanning signal drive IC chip electrically connected to the plurality of scanning signal lines, and mounted on a first flexible wiring substrate bonded to the glass substrate,        a plurality of video signal drive IC chips electrically connected to the plurality of video signal lines, and mounted on a plurality of second flexible wiring substrates bonded to the glass substrate,        a first print circuit board bonded to the plurality of second flexible wiring substrates and electrically connected to the scanning drive IC chip, and        a second print circuit board bonded to the first flexible wiring substrate;        wherein the scanning signal drive IC chip is supplied with the clock and the power from the first print circuit board via the second print circuit board and the first flexible wiring substrate; and        wherein the plurality of video drive IC chips are arranged at only one longer side of the glass substrate.     
     
     
       19. The display device according to  claim 18 , wherein the scanning signal drive IC chip is arranged at only one shorter side of the glass substrate. 
     
     
       20. The display device according to  claim 19 , further comprising a metallic shield case,
   wherein the scanning signal drive IC chip and the plurality of video signal drive IC chips are covered by the metallic shield case.     
     
     
       21. The display device according to  claim 18 , wherein the second print circuit board is supplied the clock and the power from the first print circuit board via a joiner. 
     
     
       22. The display device according to  claim 21 , wherein the scanning signal drive IC chip is arranged at only one shorter side of the glass substrate. 
     
     
       23. The display device according to  claim 22 , further comprising a metallic shield case,
   wherein the scanning signal drive IC chip and the plurality of video signal IC chips are covered by the metallic shield case.     
     
     
       24. A display device comprising:
   a glass substrate having two longer sides and two shorter sides,        a plurality of scanning signal lines and a plurality of video signal lines formed on the glass substrate,        a thin film transistor connected to one of the plurality of scanning signal lines and the video signal lines and formed on the glass substrate,        a scanning signal drive IC chip electrically connected to the plurality of scanning signal lines,        a plurality of video signal drive IC chips electrically connected to the plurality of video signal lines, and mounted on a plurality of flexible wiring substrates bonded to the plurality of video signal lines, and mounted on a plurality of flexible wiring substrates bonded to the glass substrate, and        a print circuit board bonded to the plurality of flexible wiring substrates and electrically connected to the scanning drive IC chip;        wherein the scanning signal drive IC chip is supplied with a clock and power from the print circuit board; and        wherein the plurality of video signal drive IC chips are arranged at only one longer side of the glass substrate.     
     
     
       25. The display device according to  claim 24 , wherein the scanning signal drive IC chip is arranged at only one shorter side of the glass substrate. 
     
     
       26. The display device according to  claim 25 , further comprising a metallic shield case,
   wherein the scanning signal drive IC chip and the plurality of video signal drive IC chips are covered by the metallic shield case.