IL39054A - Display device including gas cells and liquid crystal cells - Google Patents

Description

CE INCLUDING OAS CELL AND CRYSTAL DISPLAY DEVICE INCLUDING GAS CELLS AND LIQUID CRYSTAL CELLS ABSTRACT OF THE DISCLOSURE A display device includes a first portion a plurality of filled each of which can be and a second portion comprising one or more liquid crystal cells in operative relation with the cells and adapted to be energized thereby to produce areas having different optical characteristics than surrounding whereby a message can played by the different BACKGROUND OF THE INVENTION Liquid crystal display devices have been known for some Generally these devices comprise a volume of a special liquid material when electrically can be caused to it3 optical for its The prior art provides no efficient and relatively simple arrangement for driving liquid crystal vices to drive them in a manner to provide made up of a large number of small Liquid crystal compositions can be prepared so that they have that they retain their changed for a time after the applied electrical stimulus which caused the change is the other gas display devices are known which can be with relative ease to vide displays made up of many such devices do not have SUMMARY OF THE INVENTION the invention comprises a display device which includes the c bination of cells and liquid crystal with a display pattern being produced in the liquid crystal apparatus by means of the filled and with optional memory provided in the device by the liquid crystal II II DESCRIPTION OF DRAWINGS 1 is a exploded view of a display device embodyin th 2 is a sectional along the line in showing the panel 3 is a plan view illustrating a modification of the face plate of the device of is exploded of a of the 5 a sectional along the lines in showing the panel is a view of a portion of a modification of the panel of 7 is a sectional view of another modification of 3 is a perspective view of a of a portion of the and 9 is a sectional view of the apparatus shown in DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device 10 embodying the invention includes a base plate 20 of or like having a plurality of slots 30 formed in its top with an electrode 40 used as an anode seated in each of the An array of second electrodes 50 operated as cathodes and having apertures 60 are seated on or in the top surface of the base plate these electrodes preferably being in the form of apertured metal strips oriented at to the a odes so that each cathode crosses each and each crossing defines a scanning gas ceil the electrodes form rows and columns of scanning The apertures 60 in each cathode are each associated with one of the scanning cells and the cathodes considered to be aligned each with a column of scanning gas An apertured insulatin plate 80 is seated on the base plate 20 and on t cathodes and its apertures or cells known as output which are arrayed in rows and are aligned with the rows and columns of scannin cells so that each cell or aperture 90 is generally vertically aligned with o of the scanning cells 70 and communicates therewith through a cathode apertur An array of wires 100 operated as anodes are on or in the top sur face of the insulating plate with each anode 100 being aligned with and i operative relation with a row of cells 90 in the plate The panel 10 also includes a plate having resistive character seated on the plate Plate 110 may be made of a carbon impregnated such as or a conductive glass such as vanadium Plate 110 may also be made of a photoconductive Plate 110 is preferably relative thin has a resistance through its thickness of the order to 2 with the interior of the panel through a suitable hole 180 provided in plate The gas used may be any one of the gases including or the either singly or in with a vapor of metal as mercury usually included in the gas to minimize cathode sputte A wide range of gas pressures may be for about 20 to ab 350 Torr or at ambient with about 100 Torr being the press commonly This portion of the panel is then aged and processed to and then the liquid crystal is provided and sealed in place by of th cover plate The seal between the cover plate an the frame 138 may be made with a low temperature material such as an vinyl or One method of operating the display device and particularly the lowe patent scanning cell portion described in detail in copending 1 filed according to this oper ing potentials are applied to all of the scanning anodes 100 and sequentiall to each of the scanning cathodes whereby each of the columns of scanning cells 70 is fired control which may be ob tained from a suitable source of information signals are applied to each of the anodes 100 so that at any instant as these signals are applied the output cells associated with the scanning cells energized at that are caused to and this operation is facilitated by the diffusi of excited gas particles through the appropriate cathode apertures as the scanning cells are scanned and information signals are of cells fired and caused to fired carry the desired message or As the panel is as described suitable positive potentia are applied to electrode film 150 synchronously with the firing of output cel 90 so that current flows from fired cells 90 through the associated resistiv areas of resistive plate 110 and the corresponding aligned portions of the liquid crystal These currents cause the energized volumes of the liquid crystal layer to change their teristics and their and they thus by their changed stat and the same message as that entered in the cells After the entire panel has been scanned and a pattern of cells 90 has be fired and the corresponding pattern or areas in the liquid crystal layer has been modified to display the desired message or the applied poten tials can be removed if the liquid crystal material has and the message entered in the liquid crystal 130 will continue to be displayed for a period of time determined by the liquid crystal The stored message can be erased by the application of an signal across the liquid crystal layer by the application heat or by mechanical A new message can then be entered in the manner described If the liquid crystal does not have then the scanning cells and display cells must be constantly scanned and refreshed to maintain the display in the liquid crystal In a panel 10 having a liquid crystal layer 130 of a thickness of 1 to 5 mils and wherein scanning anode electrodes carry a potential of volts cathode electrodes carry a potential of volts when OFF and zero volts 1 1 J C η except that slots are also provided between the last cell in the fir row and the last cell 90 in the second and between the first cell 90A i the second row and the first cell 90Λ in the third so that all of the cells 90 are connected in a continuous and a scan of these cells can be In a cation of the invention illustrated in 7 which represent either of the panels 10 or an insulating plate of glass or the like is used in place of resistive plate and a plurality of electrodes i the form of or pins secured in plate each extending a cel 90 into the layer 130 of crystal The free end of each of th electrodes 220 within the liquid crystal layer is provided with a circular enlarged area In operation of this modification of the each cell as it couples current into corresponding volumes of the liquid crystal layer through an electrode 220 rather than through resistance paths in plate 110 as In another modification of the invention shown in and a metal plate having ah array of small apertures 260 identical in placement to t array of display cells 90 and of about the is provided between pla 110 and the liquid crystal layer 130 in any of the panels embodying The electrode 250 may be a plate or a conductive film formed on plate Plat 250 is electrically connected to the 150 on cover plate and it serves to concentrate the electric fields or whic the liquid at of the apertures in the plat to provide definition of the energized areas of the liquid crystal insufficientOCRQuality

Claims (1)

1. Λ comprising on array ofi cells a liquid crystal in relation and in operative relation with oaid ofi liquid crystal said calls cells potentials can be applied to causa currents to from fired colic through corresponding of oaid liquid crystal material and change optical characteristics thereof a displayed oaid cello can displayed by oaid of liquid crystal A display panel comprising array of cells arrayed in and in roue and a layer liquid crystal adjacent to said array ofi cells and in operative relation in operative relation with said ofi liquid crystal and oaid cello calls are and potentials can applied to cause currents to said fired cello through corresponding said liquid crystal and change optical characteristics thereof whereby a displayed by said cells can be displayed in said layer of liquid crystal Λ an array arrayed in a matrix and in and anode and cathode associated with each of said Cor S a layer of liquid crystal material adjacent to said array cello and in operative ion electrode in operative said volume of liquid crystal such said cells ore fired and discharged and potentials are applied to said electrode from fired cell through corresponding of eaid liquid crystal material and the optical thereof a displayed by cells can be displayed in oaid layer of liquid crystal A panel as defined in Claim 3 wherein oaid electrode comprises a transparent conductive which overlays layer of liquid crystal A panel de ined in Claim 3 wherein said electrode transparent conductive electrode overlaying layer of liquid material with each atrip aligned with of A as in C 3 and electrode froa each into of liquid crystal material current flow froa coll into corresponding of liquid A display panel comprising an array of arrayed in matrix and disposed in and cathode electrodes associated vith each of eaid cells Cor firing a layer of liquid crystal disposed adjacent to oaid array of and in operative relation electrode in relation vith said of liquid crystal material frets said when said colle are fired and potentials arc applied to oaid electrode current flows eai cells through corresponding volumes said liquid crystal and optical characteristics thereof whereb a by oaid cells can be displayed in layer liquid crystal A defined in and including an electrode positioned between aid liquid crystal material and oaid apertures being each aligned vith one of oaid said apertured electrode being electrically connected to said electrode A panel as defined in 7 wherein said layer of liquid crystal has an upper surface and a lower and said electrode means is disposed adjacent to said upper sur A panel as defined Claim 7 wherein layer of liquid crystal material has upper surface and a lower and electrode is disposed adjacent to said upper and a layer of conductive material is between said cells and said liquid crystal said conductive layer having resistance through its thickness cocoparable to that of said layer of liquid crystal COHEN ZEDE ά SPISBACH Box 33116 Attorneys for Applicant insufficientOCRQuality