EP0412757A2 - Display device - Google Patents

Display device Download PDF

Info

Publication number
EP0412757A2
EP0412757A2 EP19900308643 EP90308643A EP0412757A2 EP 0412757 A2 EP0412757 A2 EP 0412757A2 EP 19900308643 EP19900308643 EP 19900308643 EP 90308643 A EP90308643 A EP 90308643A EP 0412757 A2 EP0412757 A2 EP 0412757A2
Authority
EP
Grant status
Application
Patent type
Prior art keywords
electrodes
matrix
display
signal
display device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP19900308643
Other languages
German (de)
French (fr)
Other versions
EP0412757A3 (en )
Inventor
Yoshihisa Kawashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Images

Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611Control of matrices with row and column drivers
    • G09G3/3648Control of matrices with row and column drivers using an active matrix
    • G09G3/3666Control of matrices with row and column drivers using an active matrix with the matrix divided into sections

Abstract

A display device is provided with a display matrix including a plurality of display elements in a matrix way and divided into a plurality of sub-matrix blocks. The display device has a plurality of signal electrodes each connected to each row of the matrix for supplying display signals, each of the signal electrodes in one block being connected to each of the signal electrodes in other blocks at a correpsonding row respectively. The display device also has a plurality of scanning electrodes each connected to each column of the matrix for supplying active pulses, each of the scanning electrodes in one block being connected to each of the scanning electrodes in other blocks at a correpsonding column respectively. The display device is further provided with a plurality of matrix selection electrodes each equipped to each of the blocks for supplying a matrix selection signal which indicates one of the blocks, and a matrix selection control device connected to the signal electrodes and the selection electrodes for selectively allowing the signal electrodes to supply the display signals to the display elements in the block indicated by the selection signal.

Description

    BACKGROUND OF THE INVENTION 1.Field of the Invention
  • The present invention relates to a display device having a display matrix which consists of a plurality of display elements, such as LCD (Liquid Crystal Display), EL (Electroluminescence display), VFD (Vacuum Fluorescence Display), LED (Light Emitting Diode), etc. disposed in a matrix way.
  • 2.Description of the Related Art
  • As one of various kinds of display devices, there is a display device which has a display matrix provided with scanning electrodes and signal electrodes which are connected to an external driving circuit through control lines. Such a display device is shown in Fig.1.
  • In Fig.1, a display device 20 is provided with four scanning electrodes X0 to X3 and four signal electrodes Y0 to Y3. The display device 20 has a display matrix 22 which includes a plurality of segments (display elements) 24.
  • The scanning electrodes X0 to X3 are arranged in the X direction in a stripe way, each of which is connected with each column of the segments 24.
  • The signal electrodes Y0 to Y3 are arranged in the Y direction in a stripe way, each of which is connected with each row of the segments 24.
  • Each of the scanning electrodes X0 to X3 and the signal electrodes Y0 to Y3 are respectively connected to an external driving circuit through a plurality of control lines. The display device 20 is operated in a time divisional mode by the driving circuit.
  • In an operation of the display device 20, active pulses are supplied to the scanning electrodes X0 to X3 in a regular succession in a prescribed order from the scanning electrode X0. Display signals are supplied to the signal electrodes Y0 to Y3 in synchronization with the active pulses. By supplying those active pulses and display signals repeatedly at a high speed, a display data is time divisionally displayed on the display matrix 22.
  • Such a display device as describe above is defined here as a two dimensional matrix display device since which utilizes a two dimensional or flat plane-like display matrix controlled by use of two different kinds of electrodes. In this kind of two dimensional matrix display device, supposing that the number of the scanning electrodes is X and the number of the signal electrodes is Y, the X x Y pieces of segments can be controlled by use of the X + Y lines of the control lines.
  • In the above case, as the number of the segments equal to X x Y increases, the number of control lines equal to X + Y increases in a relatively rapid way.
  • Accordingly, this kind of two dimensional matrix display device raises a problem that, if the number of segments is required to be increased to a large number, the control lines, i.e. the number of the terminals of the driver circuit or the number of the driver circuits should be also increased to a quite large number in order to operate such a display device.
  • SUMMARY OF THE INVENTION
  • It is therefore an object of the present invention to provide a display device having a display matrix, in which the display matrix with a large number of the segments can be controlled by a relatively small number of the control lines.
  • According to the present invention, the object can be achieved by a display device having a display matrix. The display matrix includes a plurality of display elements in a matrix way and is divided into a plurality of sub-matrix blocks. The display device has a plurality of signal electrodes each connected to each row of the matrix for supplying display signals, each of the signal electrodes in one block being connected to each of the signal electrodes in other blocks at a correpsonding row respectively. The display device also has a plurality of scanning electrodes each connected to each column of the matrix for supplying active pulses, each of the scanning electrodes in one block being connected to each of the scanning electrodes in other blocks at a correpsonding column respectively. The display device is further provided with a plurality of matrix selection electrodes each equipped to each of the blocks for supplying a matrix selection signal which indicates one of the blocks, and a matrix selection control device connected to the signal electrodes and the selection electrodes for selectively allowing the signal electrodes to supply the display signals to the display elements in the block indicated by the selection signal.
  • In the display device of the present invention, the display matrix is divided into a plurality of sub-­matrix blocks. Each of the signal electrodes in one block is connected to each of the signal electrodes in other blocks at a correpsonding row respectively. Each of the scanning electrodes in one block is connected to each of the scanning electrodes in other blocks at a correpsonding column respectively. The selection electrodes are equipped to each of the blocks. The matrix selection control device selectively allows the signal electrodes to supply the display signals to the display elements in the block indicated by the selection signal. Accordingly, the matrix blocks can be time divisionally operated by supplying the selection signals in a regular succession. The display elements in the block selected by the control device can be time divisionally operated by supplying the active pulses in a regular succession. Thus, a display data can be time divisionally displayed on the display matrix by supplying the display signals and the matrix selection signals in synchronization with the active pulses.
  • In such an operation of the display device, an external driving circuit, consisting of a LSI device for example, generates the display, scanning and selection signals. The driving circuit is connected to the display device through a plurality of control lines. The total number of the control lines equals to the sum of the numbers of the signal, scanning and selection electrodes, while the total number of the display elements equals to the product of the numbers of the signal, scanning and selection electrodes. Consequently, quite a large number of the display elements can be controlled by a relatively small number of the control lines.
  • By use of the present invention, for example, the number of the package pins of the LSI device as the driving circuit can be effectively decreased, or the number of the LSI devices as the driving circuits can be effectively decreased, resulting in an advantageous reduction in size and cost of the whole device using the present invention.
  • Further objects and advantages of the present invention will be apparent from the following description of the preferred embodiment of the invention as illustrated in the accompanying drawings.
  • BRIEF DESCRIPTION OF THE DRAWINGS
    • Fig.1 is a schematic perspective view showing a two dimensional matrix display device;
    • Fig.2 is a schematic perspective view showing a pseudo-display device of a three dimensional matrix structure to explain a first embodiment of the present invention shown in Fig.3;
    • Fig.3 is a schematic perspective view showing the first embodiment of the present invention;
    • Fig.4 is a block diagram of the display device of Fig.1;
    • Fig.5 is a block diagram of the display device of Fig.3;
    • Fig.6 is a block diagram of a second embodiment of the present invention;
    • Fig.7 is a graph showing a relationship between the number of control lines, the number of segments and the number of dimension of matrix display devices;
    • Fig.8 is a schematic plan view showing a constructional example of the display device of Fig.4;
    • Fig.9 is a schematic plan view showing a constructional example of the display device of Fig.5; and
    • Fig. 10 is a circuit diagram of a constructional example of the display device of Fig.9.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.
  • Fig.2 shows a pseudo-display device 30p of a three dimensional display matrix type to explain the concept of a display device of a first embodiment according to the present invention shown in Fig.3.
  • In Fig.2, the device 30p is constructed by adding a concept of "height" to the display device 20 of Fig.1, namely, by piling two dimensional matrix blocks 32a,32b,32c and 32d in a Z (height) direction. Each of the blocks 32a,32b,32c,32d extends in a X direction and a Y direction in the same way as in the display matrix 22 of Fig.1,
  • The device 30p is provided with four scanning electrodes X0 to X3 and four signal electrodes Y0 to Y3.
  • Each scanning electrodes X0 to X3 is branched into four electrode portions arranged in a pile. Each of the branched electrode portions of the scanning electrodes X0 to X3 is connected to each block 32a,32b,32c,32d. In the same way, each signal electrodes Y0 to Y3 is branched into four electrodes portions arranged in a pile. Each of the branched electrode portions of the signal electrodes Y0 to Y3 is connected to each block 32a,32b,32c,32d.
  • Each block 32a,32b,32c,32d includes sixteen segments (display elements) 34 in the same way as in the case of the display matrix 22 of the Fig.1. Namely, on each block 32a,32b,32c,32d, the scanning electrodes X0 to X3 are arranged in the X direction in a stripe way, each of which is connected with each column of the segments 34. On each block 32a,32b,32c,32d, the signal electrodes Y0 to Y3 are arranged in the Y direction in a stripe way, each of which is connected with each row of the segments 34.
  • Each block 32a,32b,32c,32d is connected to each matrix selection electrode Z0,Z1,Z2,Z3 respectively.
  • Each of the scanning electrodes X0 to X3, the signal electrodes Y0 to Y3 and the selection electrodes Z0 to Z3 are respectively connected to an external driving circuit through a plurality of control lines.
  • The driving circuit supplys active pulses to the the scanning electrodes X0 to X3, and display signals to the signal electrodes Y0 to Y3 in synchronization with the active pulses. The driving circuit also supplys matrix selection signals which selects one of the block 32a,32b,32c,32d as a displaying matrix block at each time period so as to enable time divisional displaying on each of the selected block.
  • Accordingly, in the device 30p, sixty four pieces of segments 34 can be time divisionally operated by twelve control lines.
  • Fig.3 shows a display device 30 of a first embodiment of the present invention.
  • In Fig.3, the display device 30 is constructed by disposing onto a single plane the four blocks 32a,32b,32c,32d of the device 30p of Fig.2. Thus, the display device 30 has a display matrix 32 composed of the four blocks 32a,32b,32c,32d.
  • The display device 30 is defined here as a three dimensional matrix display device since it is based on the three dimensional structure as shown in Fig.2 and is controlled by use of three different kinds of electrodes.
  • Accordingly, in the display device 30, sixty four pieces of segments 34 disposed on a single plane can be time divisionally operated by twelve control lines which connect each of the scanning electrodes X0 to X3, the electrodes Y0 to Y3 and the selection electrodes Z0 to Z3 to the driving circuit. As a comparison, in the two dimensional type display device 20 shown in Fig.1, at least sixteen control lines are required to control sixty four pieces of the segments 24.
  • More generally in the display device 30, supposing that the number of the scanning electrodes is X, the number of the signal electrodes is Y, and the number of the selection electrodes is Z, the X x Y x Z pieces of segments can be controlled by use of the X + Y + Z lines of control lines connected to the driving circuit.
  • Fig.4 shows a block diagram of the two dimensional matrix display device 20.
  • In Fig.4, the display device 20 includes the display matrix 22 composed of only one block of two dimensional display matrix with two input signals S1 and S2, which indicate the display signals and the active pulses respectively.
  • Fig.5 shows a block diagram of the three dimensional matrix display device 30.
  • In Fig.5, the display device 30 includes the display matrix 32 composed of four blocks of two dimensional matrix blocks 32a,32b,32c,32d with three input signals S1, S2 and S3, which indicate the display signals, the active pulses and the selection signals respectively supplied from a driving circuit 35.
  • Fig.6 shows a block diagram of a four dimensional matrix display device 40 of a second embodiment of the present invention.
  • As in the same way of defining and constructing the three dimensional matrix display device 30 based on the two dimensional matrix display device 20 as explained with reference to Fig.2, the four dimensional matrix display device 40 is defined and constructed.
  • Namely, the display device 40 includes a display matrix 42 composed of four blocks of three dimensional matrix blocks 42a,42b,42c,42d, each of which has a same construction of the display matrix 32 of the display device 30 of Fig.5. The blocks 42a,42b,42c,42d are arranged on a single plane and provided with matrix selection electrodes which are connected to each of the blocks 42a,42b,42c,42d and to which selection signals S4 are supplied. The selection signal S4 selects one of the blocks 42a,42b,42c,42d as a displaying matrix block at each time period so as to enable the time divisional display of the display device 40, in cooperation with the display signal S1, the active pulse S2, and the selection signal S3. The display signal S1 and the active pulse S2 are supplied from a driving circuit 45a. The selection signals S3 and S4 are supplied from a driving circuit 45b. The driving circuits 45a and 45b are synchronized to each other.
  • In the display device 40, supposing that the number of scanning electrodes for the signal S2 is X, the number of signal electrodes for the signal S1 is Y, the number of matrix selection electrodes for the signal S3 is Z, and the number of matrix selection electrodes for the signal S4 is V, the X x Y x Z x V pieces of segments of the display matrix 42 can be controlled by use of the X + Y + Z + V lines of control lines connected to the driving circuits 45a,45b for the time divisional display operation.
  • As in the same way of defining and constructing the three dimensional matrix display device 30 based on the two dimensional matrix display device 20, and defining and constructing the four dimensional matrix display device 40 based on the three dimensional matrix display device 30, as explained above, a N dimensional matrix display device can be defined and constructed according to the present invention.
  • Namely, the N dimensional matrix display device includes a display matrix composed of a plurality of the (N-1) dimensional matrix blocks, arranged on a single plane and provided with matrix selection electrodes which are connected to each matrix block and to which the matrix selection signal is supplied from the driving circuit.
  • By increasing the number of the dimension of the matrix display device of the present invention, it is made possible to control a large number of the segments efficiently with a relatively small number of the control lines.
  • The Table 1 and Fig.7 show how the maximum number of the segments, which are able to be controlled by the two to eight dimensional matrix display devices, changes depending on the total number of the control lines. In the Table 1 and Fig.7, the 2-dimensional matrix corresponds to the display device 20 of Fig.4, the 3-dimensional matrix corresponds to the display device 30 of Fig.5, and the 4-dimensional matrix corresponds to the display device 40 of Fig. 6.
  • In the Table 1 and Fig.7, it is clearly shown that, as the total number of the segments is increased, the matrix of the larger number of the dimension is more advantageous in order to restrict the increase of the total number of the control lines. TABLE 1
    MAXIMUM NUMBER OF SEGMENTS ABLE TO BE CONTROLLED
    TOTAL NUMBER OF CONTROL LINES BY 2-DIMENSIONAL MATRIX BY 3-DIMENSIONAL MATRIX BY 4-DIMENSIONAL MATRIX BY 5-DIMENSIONAL MATRIX BY 6-DIMENSIONAL MATRIX BY 7-DIMENSIONAL MATRIX BY 8-DIMENSIONAL MATRIX
    2 1 0 0 0 0 0 0
    3 2 1 0 0 0 0 0
    4 4 2 1 0 0 0 0
    5 6 4 2 1 0 0 0
    6 9 8 4 2 1 0 0
    7 12 12 8 4 2 1 0
    8 16 18 16 8 4 2 1
    9 20 27 24 16 8 4 2
    10 25 36 36 32 16 8 4
    11 30 48 54 48 32 16 8
    12 36 64 81 72 64 32 16
    13 42 80 108 108 96 64 32
    14 49 100 144 162 144 128 64
    15 56 125 192 243 216 192 128
    16 64 150 256 324 324 288 256
    17 72 180 320 432 486 432 384
    18 81 216 400 576 729 648 576
    19 90 252 500 768 972 972 864
    20 100 294 625 1024 1296 1458 1296
    21 110 343 750 1280 1728 2187 1944
    22 121 392 900 1600 2304 2916 2916
    23 132 448 1080 2000 3072 3888 4374
    24 144 512 1296 2500 4096 5184 6561
    25 156 576 1512 3125 5120 6912 8748
    26 169 648 1764 3750 6400 9216 11664
    27 182 729 2058 4500 8000 12288 15552
    28 196 810 2401 5400 10000 16384 20736
  • Fig.8 shows a two dimensional matrix display device 20a as a constructional example of the display device 20 of Fig.4. In this example, the display matrix 22 consists of a LCD panel which is composed of sixteen LCD elements. Each LCD element is disposed at each intersection of the scanning electrodes X0 to X3 and the signal electrodes Y0 to Y3.
  • Fig.9 shows a three dimensional matrix display device 30a as a constructional example of the display device 30 of Fig.5.
  • In Fig.9, the display matrix 32 consists of four block 32a,32b,32c,32d. Each block 32a,32b,32c,32d consists of a LCD panel which is same as the display matrix 22 of Fig.8. The scanning electrodes X0 to X3 and the signal electrodes Y0 to Y3 are commonly used for all the blocks 32a,32b,32c,32d. The selection electrodes Z0 to Z3 are respectively connected to each block 32a,32b,32c,32d.
  • Fig.10 shows a circuit diagram of a three dimensional matrix display device 30b as a constructional example of the disply device 30a of Fig.9.
  • In Fig.10, the display device 30b is provided with four blocks 32a,32b,32c,32d. Each block 32a,32b,32c,32d is provided with sixteen segments each consists of a TFT (Thin Film Transistor) 51 and a LCD element 52 of capacity type.
  • One of the source and drain of each TFT 51 is connected to one of the scanning electrodes X0 to X3 for supplying the scanning pulses from the external driving circuit to the LCD element 52 connected to the other of the source and drain of the TFT 51. The gate of each TFT 51 is connected to the output of one of AND gates 53.
  • The AND gates 53 function to select one block from the blocks 32a,32b,32c,32d as the block to which the display signal is supplied to each TFT 51 through the signal electrodes Y0 to Y3. The first input terminal of each AND gate 53 is connected to one of the selection electrodes Z0 to Z3 for supplying the matrix selection siganl from the external driving circuit to each block. The second input terminal of each AND gate 53 is connected to one of the signal electrodes Y0 to Y3.
  • In an operation of the display device 30b, the selection signals on the Z0 to Z3 are turned to high level in a regular succession. When the selection signals on the Z0 to Z3 are turned to high level, the corresponding AND gate allows the display signal to pass therethrough. When the selection signals on the Z0 to Z3 are turned to low level, the corresponding AND gate does not allow the display signal to pass therethrough. The display signals and the matrix selection signals are supplied in synchronization with the active pulses. Accordingly, by supplying those active pulses, display signals and matrix selection signals repeatedly at a high speed, a display data can be time divisionally displayed on the matrix panel 32 consisting of the four blocks 32a,32b,32c,32d.
  • As described above, according to the present embodiment, because the blocks 32a,32b,32c,32d use commonly the scanning electrodes X0 to X3 and the signal electrodes Y0 to Y3, the time divisional display of the sixty four segments can be controlled by only twelve electrodes, i.e only twelve control lines in total.
  • In the above described embodiment, the LCD element 52 is utilized as the display element. Instead, an EL element, a VFD element, a LED element etc. can be utilized as the display element.
  • Many widely different embodiments of the present invention may be constructed without departing from the spirit and scope of the present invention. It should be understood that the present invention is not limited to the specific embodiments described in this specification, except as defined in the appended claims.
  • The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the scope of the invention.
  • There are described above novel features which the skilled man will appreciate give rise to advantages. These are each independent aspects of the invention to be covered by the present application, irrespective of whether or not they are included within the scope of the following claims.

Claims (6)

1. A display device, comprising:
a display matrix including a plurality of display elements in a matrix way and divided into a plurality of sub-matrix blocks;
a plurality of signal electrodes each connected to each row of said matrix for supplying display signals, each of said signal electrodes in one block being connected to each of said signal electrodes in other blocks at a correpsonding row respectively;
a plurality of scanning electrodes each connected to each column of said matrix for supplying active pulses, each of said scanning electrodes in one block being connected to each of said scanning electrodes in other blocks at a correpsonding column respectively;
a plurality of matrix selection electrodes each equipped to each of said blocks for supplying a matrix selection signal which indicates one of said blocks; and
a matrix selection control means connected to said signal electrodes and said selection electrodes for selectively allowing said signal electrodes to supply said display signals to said display elements in said block indicated by said selection signal.
2. A display device according to Claim 1, wherein said control means comprises a plurality of gate means, each of which is connected to each of said selection electrodes and is disposed in a portion of each of said signal electrodes, for allowing said display signal to pass therethrough when said selection signal is supplied thereto.
3. A display device according to Claim 1, wherein said display element comprises one selected from the group consisting of a LCD element, an EL element, a VFD element and a LED element.
4. A display device according to Claim 1, wherein each of said display elements includes a TFT which is connected to each of said signal electrodes and each of said scanning electrodes.
5. A display device according to Claim 1, further comprising a driving circuit connected to said signal electrodes, said scanning electrodes and said control means through a plurality of control lines for supplying said display signal, said scanning signal and said selection signal respectively.
6. A matrix display device in which each picture element is controlled by signals applied to a respective pair of data and scanning electrodes, the device comprising data and scanning terminals for supplying signals to said electrodes, each terminal being arranged to supply a plurality of electrodes so as to form groups of picture elements with each picture element of a group being fed by signals from the same pair of data and scanning terminals as a corresponding picture element in the or each other group, means being provided to enable the groups in succession to respond to the signals supplied to said terminals.
EP19900308643 1989-08-07 1990-08-06 Display device Withdrawn EP0412757A3 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP20431389A JPH0367220A (en) 1989-08-07 1989-08-07 Display device
JP204313/89 1989-08-07

Publications (2)

Publication Number Publication Date
EP0412757A2 true true EP0412757A2 (en) 1991-02-13
EP0412757A3 true EP0412757A3 (en) 1992-01-15

Family

ID=16488417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900308643 Withdrawn EP0412757A3 (en) 1989-08-07 1990-08-06 Display device

Country Status (2)

Country Link
EP (1) EP0412757A3 (en)
JP (1) JPH0367220A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014950A2 (en) * 1993-11-28 1995-06-01 A.D.P. Adaptive Visual Perception Ltd. Viewing apparatus and work station
EP0692780A1 (en) * 1994-07-12 1996-01-17 Sagem S.A. Active matrix liquid crystal display display device partitioned counter-electrode
US5890305A (en) * 1989-12-31 1999-04-06 Smartlight Ltd. Self-masking transparency viewing apparatus
US5963276A (en) * 1997-01-09 1999-10-05 Smartlight Ltd. Back projection transparency viewer with overlapping pixels
US6311419B1 (en) 1989-12-31 2001-11-06 Smartlight Ltd. Dedicated mammogram viewer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253379A2 (en) * 1986-07-15 1988-01-20 Mitsubishi Denki Kabushiki Kaisha Large screen display apparatus
US4736137A (en) * 1986-08-01 1988-04-05 Hitachi, Ltd Matrix display device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0253379A2 (en) * 1986-07-15 1988-01-20 Mitsubishi Denki Kabushiki Kaisha Large screen display apparatus
US4736137A (en) * 1986-08-01 1988-04-05 Hitachi, Ltd Matrix display device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PROCEEDINGS OF THE S.I.D. vol. 27, no. 4, 1986, NEW YORK (US) pages 309 - 312; A.H.KITAI: 'Three- and Four-Dimensional Addressing of Flat-Panel Displays' *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5890305A (en) * 1989-12-31 1999-04-06 Smartlight Ltd. Self-masking transparency viewing apparatus
US6279253B1 (en) 1989-12-31 2001-08-28 Smartlight Ltd. Self-masking transparency viewing apparatus
US6311419B1 (en) 1989-12-31 2001-11-06 Smartlight Ltd. Dedicated mammogram viewer
WO1995014950A2 (en) * 1993-11-28 1995-06-01 A.D.P. Adaptive Visual Perception Ltd. Viewing apparatus and work station
WO1995014950A3 (en) * 1993-11-28 1995-08-10 Adaptive Visual Perception Viewing apparatus and work station
US5835173A (en) * 1993-11-28 1998-11-10 Smartlight Ltd Transparency viewing device comprising passive matrix LCD
US5859676A (en) * 1993-11-28 1999-01-12 Smartlight Ltd. Self-masking viewing apparatus
US5760851A (en) * 1993-11-28 1998-06-02 Smartlight Ltd. Display device
US5790216A (en) * 1993-11-28 1998-08-04 Smartlight Ltd. Viewing apparatus and work station
FR2722603A1 (en) * 1994-07-12 1996-01-19 Societe D Applic Generales D Electricite Et De Mec The display device as a liquid crystal active matrix-electrode and against fractional
EP0692780A1 (en) * 1994-07-12 1996-01-17 Sagem S.A. Active matrix liquid crystal display display device partitioned counter-electrode
US5963276A (en) * 1997-01-09 1999-10-05 Smartlight Ltd. Back projection transparency viewer with overlapping pixels

Also Published As

Publication number Publication date Type
JPH0367220A (en) 1991-03-22 application
EP0412757A3 (en) 1992-01-15 application

Similar Documents

Publication Publication Date Title
US4822142A (en) Planar display device
US4740786A (en) Apparatus for driving liquid crystal display
US5606437A (en) Direct drive split pixel structure for active matrix liquid crystal displays
US4824212A (en) Liquid crystal display device having separate driving circuits for display and non-display regions
US4450440A (en) Construction of an epid bar graph
US5525862A (en) Electro-optical device
US5034736A (en) Bistable display with permuted excitation
US6256025B1 (en) Driving voltage generating circuit for matrix-type display device
US6323871B1 (en) Display device and its driving method
US6166725A (en) Liquid crystal display device wherein voltages having opposite polarities are applied to adjacent video signal lines of a liquid crystal display panel
US5831709A (en) Liquid crystal display having improved common line
US5148301A (en) Liquid crystal display device having a driving circuit inside the seal boundary
US5406301A (en) High reliability display
US6738036B2 (en) Decoder based row addressing circuitry with pre-writes
US6181312B1 (en) Drive circuit for an active matrix liquid crystal display device
US6573928B1 (en) Display controller, three dimensional display, and method of reducing crosstalk
EP0293048A2 (en) Matrix display system
US5739802A (en) Staged active matrix liquid crystal display with separated backplane conductors and method of using the same
US6426594B1 (en) Electro-optical device and method for driving the same
US6259504B1 (en) Liquid crystal display having split data lines
US4449123A (en) Dot matrix type multi-layer liquid crystal display device
EP0384509B1 (en) Display device with input function
US4518959A (en) Electronic analog display device
US20070001970A1 (en) Integrated circuit device and electronic instrument
US5771031A (en) Flat-panel display device and driving method of the same

Legal Events

Date Code Title Description
AK Designated contracting states:

Kind code of ref document: A2

Designated state(s): DE FR

17P Request for examination filed

Effective date: 19901220

RIN1 Inventor (correction)

Inventor name: KAWASHIMA, YOSHIHISA

AK Designated contracting states:

Kind code of ref document: A3

Designated state(s): DE FR

17Q First examination report

Effective date: 19931105

18D Deemed to be withdrawn

Effective date: 19940316