EP0412757A2 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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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
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EP
European Patent Office
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Withdrawn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
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German (de)
English (en)
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
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Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Publication of EP0412757A2 publication Critical patent/EP0412757A2/fr
Publication of EP0412757A3 publication Critical patent/EP0412757A3/en
Withdrawn legal-status Critical Current

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control 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
    • G09G3/34—Control 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
    • G09G3/36—Control 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
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3666—Control of matrices with row and column drivers using an active matrix with the matrix divided into sections

Definitions

  • 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.
  • LCD Liquid Crystal Display
  • EL Electrode
  • VFD Vauum Fluorescence Display
  • LED Light Emitting Diode
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • at least sixteen control lines are required to control sixty four pieces of the segments 24.
  • 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.
  • 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.
  • 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.
  • the four dimensional matrix display device 40 is defined and constructed.
  • 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.
  • 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.
  • a N dimensional matrix display device can be defined and constructed according to the present invention.
  • 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.
  • 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.
  • 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
  • the 4-dimensional matrix corresponds to the display device 40 of Fig. 6.
  • Fig.8 shows a two dimensional matrix display device 20a as a constructional example of the display device 20 of Fig.4.
  • 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.
  • 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.
  • 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.
  • TFT Thin Film Transistor
  • 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.
  • the selection signals on the Z0 to Z3 are turned to high level in a regular succession.
  • the corresponding AND gate allows the display signal to pass therethrough.
  • 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.
  • 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.
  • the LCD element 52 is utilized as the display element.
  • an EL element, a VFD element, a LED element etc. can be utilized as the display element.
EP19900308643 1989-08-07 1990-08-06 Display device Withdrawn EP0412757A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP204313/89 1989-08-07
JP20431389A JPH0367220A (ja) 1989-08-07 1989-08-07 表示装置

Publications (2)

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

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EP19900308643 Withdrawn EP0412757A3 (en) 1989-08-07 1990-08-06 Display device

Country Status (2)

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EP (1) EP0412757A3 (fr)
JP (1) JPH0367220A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995014950A2 (fr) * 1993-11-28 1995-06-01 A.D.P. Adaptive Visual Perception Ltd. Appareil de visualisation et poste de travail
EP0692780A1 (fr) * 1994-07-12 1996-01-17 Sagem S.A. Dispositif de visualisation à cristaux liquides, à matrice active et à contre-électrode fractionnee
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 (fr) * 1986-07-15 1988-01-20 Mitsubishi Denki Kabushiki Kaisha Dispositif d'affichage à écran large
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 (fr) * 1986-07-15 1988-01-20 Mitsubishi Denki Kabushiki Kaisha Dispositif d'affichage à écran large
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 (fr) * 1993-11-28 1995-06-01 A.D.P. Adaptive Visual Perception Ltd. Appareil de visualisation et poste de travail
WO1995014950A3 (fr) * 1993-11-28 1995-08-10 Adaptive Visual Perception Appareil de visualisation et poste de travail
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
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
EP0692780A1 (fr) * 1994-07-12 1996-01-17 Sagem S.A. Dispositif de visualisation à cristaux liquides, à matrice active et à contre-électrode fractionnee
FR2722603A1 (fr) * 1994-07-12 1996-01-19 Societe D Applic Generales D Electricite Et De Mec Dispositif de visualisation a cristaux liquides, a matrice active et a contre-electrode fractionnee
US5963276A (en) * 1997-01-09 1999-10-05 Smartlight Ltd. Back projection transparency viewer with overlapping pixels

Also Published As

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

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