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WO2012017640A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2012017640A1
WO2012017640A1 PCT/JP2011/004367 JP2011004367W WO2012017640A1 WO 2012017640 A1 WO2012017640 A1 WO 2012017640A1 JP 2011004367 W JP2011004367 W JP 2011004367W WO 2012017640 A1 WO2012017640 A1 WO 2012017640A1
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WO
WIPO (PCT)
Prior art keywords
display
data signal
switch
scanning
signal lines
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.)
Ceased
Application number
PCT/JP2011/004367
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English (en)
Japanese (ja)
Inventor
和也 松本
康之 土居
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.)
Panasonic Corp
Original Assignee
Panasonic 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
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of WO2012017640A1 publication Critical patent/WO2012017640A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • 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
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/0426—Layout of electrodes and connections
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0221—Addressing of scan or signal lines with use of split matrices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/067—Special waveforms for scanning, where no circuit details of the gate driver are given
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/025—Reduction of instantaneous peaks of current
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06—Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
    • 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
    • G09G3/3614—Control of polarity reversal in general
    • 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
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only

Definitions

  • the present invention relates to a display device, and more particularly to a display device having a plurality of display elements arranged in a matrix.
  • FIG. 14 is a diagram showing a configuration of a conventional display device.
  • a display device 900 illustrated in FIG. 14 includes a drive device control circuit 910, a display panel drive device 920, a scanning line drive device 930, and a display panel 970.
  • four scanning signal lines which are wirings for supplying the output of the scanning line driving device 930, are provided for supplying the output of the display panel driving device 920.
  • a description will be given assuming that there are three display data signal lines as wiring.
  • the display panel driving device 920 is controlled by a first control signal 911 output from the driving device control circuit 910.
  • the display panel drive device 920 includes drive circuits 921 (1) to 921 (3), a switch 980 (1), and a switch 980 (2).
  • the switch 980 (1) is for short-circuiting the outputs of the drive circuit 921 (1) and the drive circuit 921 (2).
  • the switch 980 (2) is for short-circuiting the outputs of the drive circuit 921 (2) and the drive circuit 921 (3).
  • the scanning line driving device 930 is controlled by a second control signal 912 output from the driving device control circuit 910.
  • the display panel 970 is a liquid crystal display, for example, and includes display elements 960 (1) to 960 (12).
  • the display elements 960 (1) to 960 (12) are, for example, a plurality of liquid crystal elements, and display data signals 940 (1) to 940 (3) output from the display panel driving device 920 and scanning lines. Control is performed by scanning signals 950 (1) to 950 (4) output from the driving device 930.
  • the display element 960 (1) to the display element 960 (4) respectively have a display data signal 940 (1) output from the display panel driving device 920 and a scanning signal 950 output from the scanning line driving device 930. (1) to 950 (4).
  • the display element 960 (5) to the display element 960 (8) have a display data signal 940 (2) output from the display panel driving device 920 and a scanning signal 950 (1) output from the scanning line driving device 930, respectively.
  • the display element 960 (9) to the display element 960 (12) have a display data signal 940 (3) output from the display panel driving device 920 and a scanning signal 950 (1) output from the scanning line driving device 930, respectively. Controlled by ⁇ 950 (4).
  • the scanning line driving device 930 sequentially outputs the scanning signals 950 (1) to 950 (4).
  • the scanning signal 950 (1) when the scanning signal 950 (1) is enabled, the display data signal 940 (1) to the display data signal 940 (3) are output, and the display element 960 (1), the display element 960 (5), and the display element A grayscale voltage (display data signal) is supplied to each of 960 (9).
  • the scanning signal 950 (2) when the scanning signal 950 (2) is enabled, the display data signal 940 (1) to the display data signal 940 (3) are output, and the display element 960 (2), the display element 960 (6), and A gradation voltage (display data signal) is supplied to each of the display elements 960 (10).
  • the scanning signal 950 (3) when the scanning signal 950 (3) is in an enable state, the display data signal 940 (1) to the display data signal 940 (3) are output, and the display element 960 (3), the display element 960 (7), and the display element are output.
  • a gradation voltage (display data signal) is supplied to each of 960 (11).
  • the scanning signal 950 (4) is enabled, the display data signal 940 (1) to the display data signal 940 (3) are output, and the display element 960 (4), the display element 960 (8), and the display element 960 (12).
  • the display panel 970 can display a desired picture.
  • the display panel 970 converts the output from the display panel driving device 920, that is, the outputs of the driving circuits 921 (1) to 921 (3) to DC.
  • the display elements 960 (1) to 960 (12) are burned and the life is shortened. Therefore, the output of the drive circuits 921 (1) to (3) is mainly driven by alternating current.
  • a driving method Also known as a driving method are a dot inversion driving method and a row line inversion driving method.
  • the display panel 970 sets a voltage applied to every other display element 960 for each frame period to a higher potential than the staggered reference potential (hereinafter, referred to as a reference potential).
  • Driving is divided into positive polarity and low potential (hereinafter negative polarity).
  • the display panel 970 drives the display elements 960 in the row direction alternately for each frame separately for positive polarity and negative polarity.
  • the output of the adjacent driving circuit 921 alternately outputs positive polarity and negative polarity. Therefore, by short-circuiting the outputs of the drive circuit 921 with the switch 980, charges can be collected and power consumption can be reduced.
  • the conventional display device 900 shown in FIG. 14 has a problem that charge cannot be collected depending on the driving method, and heat generation cannot be suppressed.
  • the present invention has been made in view of the above-described circumstances, and an object thereof is to provide a display device that can suppress an increase in power consumption and heat generation regardless of a display panel driving method.
  • a display device includes a display panel including a plurality of display elements arranged in a matrix and a plurality of rows of the plurality of display elements.
  • a plurality of scanning lines for supplying scanning signals for controlling a plurality of display elements in a corresponding row, and a plurality of columns in the plurality of display elements, and a plurality of scanning lines in the corresponding columns.
  • a plurality of data signal lines for supplying a data signal for determining brightness of each display element; and at least one data signal line among the plurality of data signal lines, wherein a part of the plurality of display elements is A switch for electrically disconnecting from the other part of the plurality of display elements.
  • the switch may be formed in the display panel.
  • the display device may further include a data line driving device that generates the data signal to be supplied to the plurality of data signal lines, and the switch may be formed in the data line driving device.
  • At least one switch may be provided for each of the plurality of data signal lines.
  • one switch may be provided for each of the plurality of data signal lines, and may be provided at a position that bisects the plurality of display elements in the corresponding column.
  • This configuration makes it possible to further reduce heat generation.
  • a plurality of the switches may be provided for each of the plurality of data signal lines, and may be provided at all corresponding positions between adjacent display elements in a corresponding column.
  • a plurality of the switches are provided for each of the plurality of data signal lines, and are provided at corresponding positions between the plurality of display elements in the corresponding column, and are provided for each of the plurality of data signal lines.
  • the number of the switches may be different between adjacent data signal lines.
  • This configuration can prevent switches from being crowded. Accordingly, display unevenness due to heat generated by the resistance component of the switch itself due to the denseness of the switch can be prevented.
  • the display device further includes a data line driving device for generating the data signal to be supplied to the plurality of data signal lines, and the plurality of data signal lines are respectively a first branch data signal line and a second branch.
  • Data signal lines, the plurality of data signal lines are branched into the first branch data signal line and the second branch data signal line, and each of the first branch data signal lines includes the plurality of display elements.
  • the second branch data signal lines are provided corresponding to the remaining portions of the plurality of rows of the plurality of display elements, respectively, and the switch is provided so as to correspond to a part of the plurality of rows.
  • One may be provided for each of the first branch data signal lines and each of the second branch data signal lines.
  • the plurality of data signal lines are branched into the first branch data signal line and the second branch data signal line in the data line driving device, and the switch is provided in the data line driving device.
  • the data line driving device includes a plurality of driving circuits for supplying the data signals to the corresponding data signal lines, and for supplying a control signal for controlling the driving circuit to the plurality of driving circuits.
  • the control lines may be connected, and the plurality of drive circuits may have current capabilities adjusted by the control signal.
  • the display device further includes a scanning line driving device that generates the scanning signal to be supplied to the plurality of scanning signal lines and generates a switch control signal for controlling the switch. It may be controlled on or off by the switch control signal.
  • the display device further includes a data line driving device that generates the data signal to be supplied to the plurality of data signal lines and generates a switch control signal for controlling the switch. It may be controlled on or off by the switch control signal.
  • the display device further includes a scanning line driving device that generates the scanning signals to be supplied to the plurality of scanning signal lines, and a data line driving device that generates the data signals to be supplied to the plurality of data signal lines.
  • a drive device control circuit that generates a switch control signal for controlling the switch, and the switch may be controlled to be turned on or off by the switch control signal.
  • the switch may not be arranged on the display panel.
  • the existing scanning line driving device, the existing data line driving device, and the existing driving device control circuit can be used as components constituting the display device, which is cost-effective.
  • the switch allows the switch to be arranged not only on the display panel but also on external parts, as well as flexibly responding to adjustment of the current capacity and shape change of the switch.
  • the switch when the switch is formed in the data line driving device, there is an effect that the mobility of the transistors constituting the switch can be formed much higher than when the switch is formed in the display panel.
  • present invention may be realized not only as an apparatus but also as an integrated circuit including processing means included in such an apparatus.
  • the present invention it is possible to realize a display device that can suppress an increase in power consumption and heat generation regardless of the display panel driving method. Specifically, by reducing the capacity driven by the display panel drive device included in the display device in a time-sharing manner, power consumption can be reduced and heat generation can be reduced.
  • FIG. 1 is a diagram illustrating a configuration of a display device according to Embodiment 1.
  • FIG. 2 is a timing chart for explaining the operation of the display device in the first embodiment.
  • FIG. 3 is a diagram illustrating a configuration of the display device according to the first modification of the first embodiment.
  • FIG. 4 is a diagram illustrating a configuration of a display device according to the second modification of the first embodiment.
  • FIG. 5 is a diagram illustrating a configuration of the display device according to the second embodiment.
  • FIG. 6 is a timing chart for explaining the operation of the display device in the second embodiment.
  • FIG. 7 is a diagram illustrating a configuration of a display device according to the first modification of the second embodiment.
  • FIG. 1 is a diagram illustrating a configuration of a display device according to Embodiment 1.
  • FIG. 2 is a timing chart for explaining the operation of the display device in the first embodiment.
  • FIG. 3 is a diagram illustrating a configuration of the display device according to the first modification of the
  • FIG. 8A is a timing chart for explaining the operation of the display device in the first modification of the second embodiment.
  • FIG. 8B is a timing chart for explaining the operation of the display device in the first modification of the second embodiment.
  • FIG. 9 is a diagram illustrating a configuration of a display device according to Embodiment 3.
  • FIG. 10 is a timing chart for explaining the operation of the display device in the third embodiment.
  • FIG. 11 is a diagram illustrating a configuration of the display device according to the fourth embodiment.
  • FIG. 12 is a timing chart for explaining the operation of the display device in the fourth embodiment.
  • FIG. 13 is a diagram illustrating a configuration of a display device according to the first modification of the fourth embodiment.
  • FIG. 14 is a diagram illustrating a configuration of a display device according to the related art.
  • FIG. 1 is a diagram illustrating a configuration of a display device according to Embodiment 1.
  • the display device 100 shown in FIG. 1 includes a drive device control circuit 110, a display panel drive device 120, a scanning line drive device 130, and a display panel 170. Further, the display device 100 includes display data signal lines 140 and scanning signal lines 150.
  • display data signal lines 140 which are wirings for supplying the output of the scanning line driving device 130 and display data signals which are wirings for supplying the output of the display panel driving device 120 are shown. A description will be given assuming that there are three lines 140.
  • the display panel driving device 120 is controlled by a first control signal 111 output from the driving device control circuit 110.
  • the display panel driving device 120 is connected to the display data signal line 140 (1) to the display data signal line 140 (3), and the display data signal that determines the brightness of the corresponding display element 160 (1) to the display element 160 (12). Are output to the display data signal line 140 (1) to the display data signal line 140 (3), respectively.
  • the scanning line driving device 130 is controlled by the second control signal 112 output from the driving device control circuit 110.
  • the scanning line driving device 130 is connected to the scanning signal lines 150 (1) to 150 (4), and controls the corresponding display elements 160 (1) to 160 (12) to be turned on or off.
  • a scanning signal (control signal) is output to each of the scanning signal lines 150 (1) to 150 (4).
  • the scanning line driving device 130 outputs a switch control signal 190 for controlling the switches 180 (1) to 180 (3) to be turned on or off.
  • the display panel 170 is a liquid crystal display, for example, and has a plurality of display elements arranged in a matrix. More specifically, the display panel 170 includes display elements 160 (1) to 160 (12) and switches 180 (1) to 180 (3).
  • the display data signal line 140 is provided corresponding to a plurality of columns of the plurality of display elements 160, and a data signal for determining the brightness of each of the plurality of display elements 160 in the corresponding column among the plurality of display elements 160. Wiring for supplying.
  • the display data signal line 140 is also a wiring for supplying the output of the display panel driving device 120.
  • the scanning signal line 150 is provided corresponding to a plurality of rows of the plurality of display elements 160, and supplies a scanning signal for controlling the plurality of display elements 160 in the corresponding row of the plurality of display elements 160. Wiring.
  • the scanning signal line 150 is also a wiring for supplying the output of the scanning line driving device 130.
  • the display elements 160 (1) to 160 (12) are, for example, a plurality of liquid crystal elements, and are output from the display panel driving device 120 to the display data signal line 140 (1) to the display data signal line 140 (3).
  • the display data signal and the scanning signal output from the scanning line driver 130 to the scanning signal line 150 (1) to the scanning signal line 150 (4) are controlled.
  • the display element 160 (1) to the display element 160 (4) respectively scan the display data signal output from the display panel driving device 120 to the display data signal line 140 (1) and the scanning line driving device 130. It is controlled by the scanning signal output to the signal line 150 (1) to the scanning signal line 150 (4).
  • the display element 160 (5) to the display element 160 (8) respectively include a display data signal output from the display panel driving device 120 to the display data signal line 140 (2) and a scanning signal line from the scanning line driving device 130. 150 (1) to scanning signal line 150 (4).
  • the display element 160 (9) to the display element 160 (12) respectively display the display data signal output from the display panel driving device 120 to the display data signal line 140 (3) and the scanning signal line 150 (1) from the scanning line driving device 130. To the scanning signal line 150 (4).
  • the switches 180 (1) to 180 (3) are provided on at least one display data signal line 140 among the plurality of display data signal lines 140, and a part of the plurality of display elements 160 is connected to the plurality of display elements 160. It is for electrically separating from other parts. Specifically, the switches 180 (1) to 180 (3) are provided on the display data signal lines 140 (1) to 140 (3), respectively, and the display data signal lines 140 (1). The display data signal lines 140 (3) are electrically disconnected from each other. The switches 180 (1) to 180 (3) are controlled to be turned on or off by a switch control signal 190 (third control signal) output from the scanning line driving device 130. For example, when the switches 180 (1) to 180 (3) are turned off, the display data signal is not supplied to the display element 160 connected to the electrically disconnected display data signal line 140. The display data signal is supplied to the display element 160 connected to the display data signal portion that is not electrically disconnected.
  • a switch control signal 190 third control signal
  • the switch 180 (1) when the switch 180 (1) is controlled to be turned off, the display data signal line 140 (1) to which the display element 160 (3) and the display element 160 (4) are connected, and the display element 160 ( 1) and the display data signal line 140 (1) to which the display element 160 (2) is connected are electrically disconnected. Therefore, the display data signal is not supplied to the display element 160 (3) and the display element 160 (4).
  • the switch 180 (2) when the switch 180 (2) is controlled to be turned off, the display data signal line 140 (2) to which the display element 160 (7) and the display element 160 (8) are connected, and the display element 160 (5).
  • the display data signal line 140 (2) to which the display element 160 (6) is connected is electrically disconnected. Therefore, the display data signal is not supplied to the display element 160 (7) and the display element 160 (8).
  • the display data signal is supplied to the display element 160 (9) and the display element 160 (10), but the display element 160 (11) and the display element are displayed. It is not supplied to the element 160 (12).
  • the switches 180 (1) to 180 (3) are formed of, for example, amorphous silicon TFT, LTPS-TFT (Low Temperature Polycrystalline Silicon TFT), or HTPS-TFT (High Temperature Polyline Silicon TFT).
  • FIG. 2 is a timing chart for explaining the operation of the display device according to the first embodiment.
  • the scanning line driving device 130 sequentially applies scanning signals indicating enable states to the scanning signal lines 150 (1) to 150 (4). Suppose that it outputs. Note that the scanning signal indicating the enabled state turns on the corresponding display elements 160 (1) to 160 (12).
  • the scanning signal in the enabled state is output to the scanning signal line 150 (1) by the scanning line driving device 130.
  • the display data signal is output to the display data signal line 140 (1) to the display data signal line 140 (3) by the display panel driving device 120, the display element 160 (1) and the display element 160 (5 ).
  • a gradation voltage (display data signal) that determines the degree of lightness and darkness is supplied to each display element 160 (9).
  • the scanning line driving device 130 outputs the scanning signal in the enabled state to the scanning signal line 150 (2).
  • the display data signal is output to the display data signal lines 140 (1) to 140 (3) by the display panel driving device 120, the display elements 160 (2) and 160 (6) ).
  • a gradation voltage (display data signal) is supplied to each of the display elements 160 (10).
  • the scanning line driving device 130 outputs the scanning signal in the enabled state to the scanning signal line 150 (3).
  • the display data signal is output to the display data signal line 140 (1) to the display data signal line 140 (3) by the display panel driving device 120, the display element 160 (3) and the display element 160 (7 ), A gradation voltage (display data signal) is supplied to each of the display elements 160 (11).
  • the scanning line driving device 130 outputs the scanning signal in the enabled state to the scanning signal line 150 (4).
  • the display data signal is output to the display data signal line 140 (1) to the display data signal line 140 (3) by the display panel driving device 120, the display element 160 (4) and the display element 160 (8 ), A gradation voltage (display data signal) is supplied to each of the display elements 160 (12).
  • scanning line driving is performed until a scanning signal in an enabled state is output to the scanning signal line 150 (3) (from time t1 to time t3, from time t5 to time t7).
  • the switch control signal 190 output by the device 130 is in a disabled state.
  • the switches 180 (1) to 180 (3) are enabled until a scanning signal in an enabled state is output to the scanning signal line 150 (3) (between time t1 and time t3, between time t5 and time t7).
  • a disabled state non-conducting state, off state).
  • the display data signal line 140 (1) to the display data signal line 140 (3) are connected to the display element 160 (3) and the display element 160 from time t1 to time t3 (and from time t5 to time t7).
  • the display element 160 (7), the display element 160 (8), the display element 160 (11), and the display element 160 (12) are not connected. Accordingly, the wiring capacitance added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced between the time t1 and the time t3 and between the time t5 and the time t7. .
  • the wiring capacity added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced in time series. Accordingly, the display device 100 in this embodiment can reduce power consumption and can realize low heat generation. In addition, by realizing low power consumption, it is possible to realize low EMI at the same time.
  • the first embodiment it is possible to realize a display device that can suppress an increase in power consumption and heat generation regardless of a display panel driving method.
  • FIG. 3 is a diagram illustrating a configuration of the display device according to the first modification of the first embodiment.
  • the display device 200 shown in FIG. 3 includes a drive device control circuit 110, a display panel drive device 220, a scanning line drive device 230, and a display panel 270. Elements similar to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • this display device 200 is different from the display device 100 according to the first embodiment in the configuration of a display panel driving device 220, a scanning line driving device 230, and a display panel 270.
  • this display device 200 is characterized in that a switch control signal 290 for controlling the switches 180 (1) to 180 (3) is output from the display panel driving device 220 instead of the scanning line driving device 230.
  • This is different from the first embodiment.
  • FIG. 4 is a diagram illustrating a configuration of a display device according to the second modification of the first embodiment.
  • a display device 300 illustrated in FIG. 4 includes a drive device control circuit 310, a display panel drive device 120, a scanning line drive device 230, and a display panel 370. Elements similar to those in FIGS. 1 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • this display device 300 is characterized in that a switch control signal 390 for controlling the switches 180 (1) to 180 (3) is output from the drive device control circuit 310 instead of the scanning line drive device 230.
  • This is different from the first embodiment.
  • Other configurations are substantially the same as those of the display device 100 according to the first embodiment, and the scanning line driving device 230 has the same configuration as that described in the second modification, and thus description thereof is omitted. Since the operation is the same as that of the display device 100 according to the first embodiment, the description thereof is omitted.
  • Such a configuration not only provides the same effects as those of the first embodiment, but also has an advantage in mounting that an existing scanning line driving device and display panel driving device can be used.
  • the switch control signal for controlling the switches 180 (1) to 180 (3) may be output from any of the driving device control circuit, the display panel driving device, and the scanning line driving device.
  • the existing drive device control circuit, the existing display panel drive device, or the existing scan line drive device can be used (applied) as desired, so that the manufacturing cost can be further reduced.
  • FIG. 5 is a diagram illustrating a configuration of the display device according to the second embodiment. Elements similar to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the display device 400 shown in FIG. 5 includes a drive device control circuit 110, a display panel drive device 120, a scanning line drive device 430, and a display panel 470.
  • the display device 100 differs from the display device 100 according to the first embodiment in the configuration of the scanning line driving device 430 and the display panel 470.
  • the scanning line driving device 430 is controlled by the second control signal 112 output from the driving device control circuit 110 similarly to the scanning line driving device 130.
  • the scanning line driving device 430 is connected to the scanning signal lines 150 (1) to 150 (4) and controls the corresponding display elements 160 (1) to 160 (12) to be turned on or off.
  • a scanning signal (control signal) is output to each of the scanning signal lines 150 (1) to 150 (4).
  • the scanning line driver 430 receives switch control signals 490 (1) to 490 (3) for controlling the switches 480 (1) to 480 (9) of the display panel 470 to be turned on or off. Output.
  • the display panel 470 is a liquid crystal display, for example, and includes display elements 160 (1) to 160 (12) and switches 480 (1) to 480 (9). Note that the display panel 470 differs from the display panel 170 according to Embodiment 1 in the configuration of the switches 480 (1) to 480 (9).
  • the display elements 160 (1) to 160 (12) are, for example, a plurality of liquid crystal elements, and are output from the display panel driving device 120 to the display data signal line 140 (1) to the display data signal line 140 (3).
  • the display data signal and the scanning signal output from the scanning line driver 430 to the scanning signal lines 150 (1) to 150 (4) are controlled.
  • a plurality of switches 480 (1) to 480 (9) are provided on display data signal lines 140 (1) to 140 (3), respectively, and between adjacent display elements in the corresponding column. It is provided at all positions corresponding to.
  • the switches 480 (1) to 480 (9) are electrically connected to a part of the display elements 160 (1) to 160 (12) from the other parts of the plurality of display elements 160 (1) to 160 (12). It is intended for separation.
  • the switches 480 (1) to 480 (9) are controlled to be turned on or off by a switch control signal 490 (third control signal) output from the scanning line driving device 430.
  • the switch 480 (1) is provided between the display element 160 (1) and the display element 160 (2), and electrically disconnects the display data signal line 140 (1) between them. It is a switch.
  • the switch 480 (2) is provided between the display element 160 (2) and the display element 160 (3), and is a switch for electrically disconnecting the display data signal line 140 (1) therebetween.
  • the switch 480 (3) is provided between the display element 160 (3) and the display element 160 (4), and is a switch for electrically disconnecting the display data signal line 140 (1) therebetween. is there.
  • the switch 480 (4) is provided between the display element 160 (5) and the display element 160 (6), and is a switch for electrically disconnecting the display data signal line 140 (2) between them. is there.
  • the switch 480 (5) is provided between the display element 160 (6) and the display element 160 (7), and is a switch for electrically disconnecting the display data signal line 140 (2) between them.
  • the switch 480 (6) is provided between the display element 160 (7) and the display element 160 (8), and is a switch for electrically disconnecting the display data signal line 140 (2) therebetween. It is.
  • the switch 480 (7) is provided between the display element 160 (9) and the display element 160 (10), and is a switch for electrically disconnecting the display data signal line 140 (3) between them. is there.
  • the switch 480 (8) is provided between the display element 160 (10) and the display element 160 (11), and is a switch for electrically disconnecting the display data signal line 140 (3) between them.
  • the switch 480 (9) is provided between the display element 160 (11) and the display element 160 (12), and is a switch for electrically disconnecting the display data signal line 140 (3) therebetween. It is.
  • the switch 480 (1), the switch 480 (4), and the switch 480 (7) are controlled to be turned on or off by a switch control signal 490 (1) output from the scanning line driving device 430.
  • the switch 480 (2), the switch 480 (5), and the switch 480 (8) are controlled to be turned on or off by a switch control signal 490 (2) output from the scanning line driving device 430.
  • the switch 480 (3), the switch 480 (6), and the switch 480 (9) are controlled to be turned on or off by a switch control signal 490 (3) output from the scanning line driving device 430.
  • FIG. 6 is a timing chart for explaining the operation of the display device according to the second embodiment. Elements similar to those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the scanning line driving device 430 sequentially applies scanning signals indicating enable states to the scanning signal lines 150 (1) to 150 (4). Output.
  • the operations shown in FIGS. 6 (a) to 6 (d) are the same as the operations in FIGS. 2 (a) to 2 (d) described above, and thus the description thereof will be omitted. Different operations will be described.
  • the scanning line driving device First, as shown in FIG. 6E, until a scanning signal in an enabled state is output to the scanning signal line 150 (2) (from time t1 to time t2, from time t5 to time t6), the scanning line driving device.
  • the switch control signal 490 (1) output by 430 is in a disabled state. That is, the switch 480 (1), the switch 480 (4), and the switch 480 (7) are in the time period until the scan signal in the enabled state is output to the scan signal line 150 (2) (between time t1 and time t2). During the period from t5 to time t6), it is disabled.
  • the display data signal line 140 (1) to the display data signal line 140 (3) are connected to the display element 160 (2) to the display element 160 from the time t1 to the time t2 (and from the time t5 to the time t6).
  • the display elements 160 (6) to 160 (8) and the display elements 160 (10) to 160 (12) are not electrically connected. Thereby, the wiring capacity added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced between the time t1 and the time t2 and between the time t5 and the time t6. .
  • the scanning line driving device until the scanning signal in the enabled state is output to the scanning signal line 150 (3) (from time t1 to time t3, from time t5 to time t7), the scanning line driving device.
  • the switch control signal 490 (2) output by 430 is in a disabled state.
  • the switch 480 (2), the switch 480 (5), and the switch 480 (8) are in the time t5 until the scan signal in the enabled state is output to the scan signal line 150 (3) (from time t1 to time t3). From time t7 to time t7).
  • the display data signal line 140 (1) to the display data signal line 140 (3) are connected to the display element 160 (3) and the display element 160 from time t2 to time t3 (and from time t6 to time t7).
  • the display element 160 (7), the display element 160 (8), the display element 160 (11), and the display element 160 (12) are not electrically connected. Accordingly, the wiring capacitance added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced between the time t2 and the time t3 and between the time t6 and the time t7. .
  • the scanning line The switch control signal 490 (3) output by the driving device 430 is in a disabled state.
  • the switch 480 (3), the switch 480 (6), and the switch 480 (9) are switched from the time t1 to the time t4 until the scanning signal in the enabled state is output to the scanning signal line 150 (4). From time t8 to time t8).
  • the display data signal line 140 (1) to the display data signal line 140 (3) are connected to the display element 160 (4) and the display element 160 from time t3 to time t4 (and from time t7 to time t8).
  • the display element 160 (12) is not electrically connected. Thereby, the wiring capacitance added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced between the time t3 and the time t4 and between the time t7 and the time t8. .
  • the wiring capacity added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced in time series.
  • the power consumption can be reduced more than that of the display device in Embodiment 1, and the heat generation can be reduced.
  • the second embodiment it is possible to realize a display device capable of suppressing an increase in power consumption and heat generation regardless of a display panel driving method.
  • the switch control signal for controlling the switches 480 (1) to 480 (9) has been described as being output from the scanning line driving device, but the present invention is not limited to this. Similarly to the first embodiment, the output may be output from either the driving device control circuit or the display panel driving device scanning line driving device.
  • switch 480 (1) to switch 480 (9) are controlled by switch control signal 490 (1), switch control signal 490 (2), and switch control signal 490 (3).
  • switch control signal 490 (1) switch control signal 490 (1)
  • switch control signal 490 (2) switch control signal 490 (3)
  • switch control signal 490 (3) switch control signal 490 (3)
  • the switches 480 (1) to 480 (9) may be individually controlled by increasing the number of switch control signals.
  • FIG. 7 is a diagram illustrating a configuration of a display device according to the first modification of the second embodiment.
  • a display device 500 illustrated in FIG. 7 includes a driving device control circuit 110, a display panel driving device 120, a scanning line driving device 430, and a display panel 570.
  • the same elements as those in FIG. 5 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the display device 400 of the second embodiment in the configuration of the display panel 570.
  • the number of switches 480 constituting the display panel 570 is different, and the switch 480 (2), the switch 480 (4), the switch 480 (6), and the switch 480 (8) included in the display panel 470 are provided.
  • the configuration has been deleted.
  • a plurality of switches 480 are provided for each of the plurality of display data signal lines 140 and are provided at corresponding positions between the plurality of display elements 160 in the corresponding column. Further, the number of switches 480 is different between adjacent display data signal lines 140.
  • FIG. 8A and 8B are timing charts for explaining the operation of the display device in the first modification of the second embodiment.
  • FIG. 8A shows the switches 480 (1), 480 (3), 480 (7), and 480 (9) connected to the display data signal line 140 (1) and the display data signal line 140 (3). Shows control.
  • FIG. 8B shows control for the switch 480 (5) connected to the display data signal line 140 (2).
  • symbol is attached
  • the scanning line driving device 430 sequentially outputs scanning signals indicating the enable state to the scanning signal lines 150 (1) to 150 (4). Since this operation is the same as that in FIGS. 6A to 6D, detailed description thereof is omitted.
  • the switch control signal 490 (1) output by the scanning line driving device 430 is in a disabled state. That is, the switch 480 (1) and the switch 480 (7) are operated until the scanning signal in the enabled state is output to the scanning signal line 150 (2) (between time t1 and time t2, between time t5 and time t6). ), Disabled. Therefore, the display data signal line 140 (1) and the display data signal line 140 (3) are connected to the display element 160 (2) to the display element 160 between the time t1 and the time t2 (and between the time t5 and the time t6).
  • the display elements 160 (10) to 160 (12) are not electrically connected. Thereby, the wiring capacitance added to the display data signal line 140 (1) and the display data signal line 140 (3) can be reduced between the time t1 and the time t2 and between the time t5 and the time t6. .
  • scanning line driving is performed until an enabled scanning signal is output to the scanning signal line 150 (4) (from time t1 to time 4, from time t5 to time t8).
  • the switch control signal 490 (3) output by the device 430 is in a disabled state.
  • the switch 480 (3) and the switch 480 (9) are in effect until the scanning signal in the enabled state is output to the scanning signal line 150 (4) (from time t1 to time t4, from time t5 to time t8). Disabled.
  • the display data signal line 140 (1) and the display data signal line 140 (3) include a display element 160 (4), a display element 160 (4), and a display element 160 (4) between the time t1 and time t4 (and between time t5 and time t8).
  • 160 (12) is not electrically connected.
  • the wiring capacitance added to the display data signal line 140 (1) and the display data signal line 140 (3) is reduced between the time t2 and the time t4 and between the time t6 and the time t8. be able to.
  • scanning line driving is performed until a scanning signal in an enabled state is output to the scanning signal line 150 (3) (from time t1 to time t3, from time t5 to time t7).
  • Switch control signal 490 (2) output by device 430 is disabled.
  • the switch 480 (5) is disabled until an enabled scanning signal is output to the scanning signal line 150 (3) (from time t1 to time t3, from time t5 to time t7).
  • the display element 160 (7) and the display element 160 (8) are electrically connected to the display data signal line 140 (2) between time t1 and time t3 (and between time t5 and time t7).
  • the wiring capacitance added to the display data signal line 140 (2) can be reduced between the time t1 and the time t3 and between the time t5 and the time t7.
  • the wiring capacity added to the display data signal line 140 (1) to the display data signal line 140 (3) can be reduced in time series.
  • the display panel 570 has an effect that it is possible to avoid the possibility that the display unevenness occurs only at a place where the switches 480 are densely arranged.
  • the switch 480 generates heat due to its own resistance component. If there is a place where the switches 480 are densely packed, it may be recognized as display unevenness on the display panel due to heat. However, as in this configuration, for example, as in the configuration in which the switches 480 are thinned out as described above, the number and height of each display data signal line are adjusted to concentrate heat on the display panel 570. Can be prevented. This can prevent the display panel 570 from being recognized as display unevenness.
  • the display panel 570 is configured by deleting the switch 480 (2), the switch 480 (4), the switch 480 (6), and the switch 480 (8). . It goes without saying that various patterns that can prevent heat concentration on the display panel 570 are conceivable.
  • FIG. 9 is a diagram illustrating a configuration of a display device according to Embodiment 3. Elements similar to those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the display device 600 shown in FIG. 9 includes a drive device control circuit 110, a display panel drive device 620, a scanning line drive device 630, and a display panel 670.
  • Embodiment 9 is different from the display device 100 according to Embodiment 1 in the configuration of a display panel driving device 620, a scanning line driving device 630, and a display panel 670.
  • the display panel driving device 620 is controlled by the first control signal 111 output from the driving device control circuit 110. Further, as shown in FIG. 9, the display panel driving device 620 includes driving circuits 621 (1) to 621 (3), and each of the driving circuits 621 (1) to 621 (3) and display data. The signal line 640 (A) to the display data signal line 640 (C) are connected. Then, the driver circuits 621 (1) to 621 (3) are connected to the corresponding display data signal lines 640 (1) to 640 (3), respectively, and the display elements 160 (1) to 160 ( 12) A display data signal for determining light and dark is output. As shown in FIG.
  • the display data signal line 640 (A) is branched on the display panel 670 into a display data signal line 640 (1) and a display data signal line 640 (2).
  • the display data signal line 640 (B) is branched into a display data signal line 640 (3) and a display data signal line 640 (4).
  • the display data signal line 640 (C) is branched into a display data signal line 640 (5) and a display data signal line 640 (6).
  • the scanning line driving device 630 is controlled by the second control signal 112 output from the driving device control circuit 110 similarly to the scanning line driving device 130.
  • the scan line driver 630 is connected to the scan signal lines 150 (1) to 150 (4) and outputs a scan signal to each of the scan signal lines 150 (1) to 150 (4). Further, the scanning line driving device 630 outputs a switch control signal 690 for controlling the switches 680 (1) to 680 (6) to be on or off.
  • the display panel 670 is, for example, a liquid crystal display, and includes display elements 160 (1) to 160 (12) and switches 680 (1) to 680 (6).
  • the display elements 160 (1) to 160 (12) are, for example, a plurality of liquid crystal elements, and display is performed from the display panel driving device 620 via the display data signal lines 640 (A) to 640 (C).
  • Display data signals output to the data signal line 640 (1) to the display data signal line 640 (6) and output from the scanning line driver 630 to the scanning signal line 150 (1) to the scanning signal line 150 (4). It is controlled by the scanning signal.
  • the display data signal line 640 (1) to the display data signal line 640 (6) are provided corresponding to a part of a plurality of columns of the plurality of display elements 160, respectively.
  • the display element 160 (1) and the display element 160 (2) are output from the driver circuit 621 (1) to the display data signal line 640 (1) through the display data signal line 640 (A).
  • the display data signal and the scanning signal output from the scanning line driver 630 to the scanning signal line 150 (1) and the scanning signal line 150 (2) are controlled.
  • the display element 160 (3) and the display element 160 (4) are a display data signal output from the driver circuit 621 (1) to the display data signal line 640 (2) via the display data signal line 640 (A).
  • the scanning signal is controlled by the scanning signal line 150 (3) and the scanning signal output from the scanning line driver 630 to the scanning signal line 150 (4).
  • the display element 160 (5) and the display element 160 (6) are displayed on the display data signal line 640 (3) from the drive circuit 621 (2) via the display data signal line 640 (B).
  • the data signal and the scanning signal output from the scanning line driver 630 to the scanning signal line 150 (1) and the scanning signal line 150 (2) are controlled.
  • the display element 160 (7) and the display element 160 (8) are a display data signal output from the driver circuit 621 (2) to the display data signal line 640 (4) via the display data signal line 640 (B).
  • the scanning signal is controlled by the scanning signal line 150 (3) and the scanning signal output from the scanning line driver 630 to the scanning signal line 150 (4).
  • the display element 160 (9) and the display element 160 (10) are output from the drive circuit 621 (3) to the display data signal line 640 (5) via the display data signal line 640 (C).
  • the display data signal and the scanning signal output from the scanning line driver 630 to the scanning signal line 150 (1) and the scanning signal line 150 (2) are controlled.
  • the display element 160 (11) and the display element 160 (12) are a display data signal output from the driving circuit 621 (3) to the display data signal line 640 (6) via the display data signal line 640 (C).
  • the scanning signal line 150 (3) output from the scanning line driver 630 and the scanning signal output to the scanning signal line 150 (4) are respectively controlled.
  • Each of the switches 680 (1) to 680 (6) is provided for each of the display data signal lines 640 (1) to 640 (6), and a part of the plurality of display elements 160 is displayed in plural. This is for electrically disconnecting from the other part of the element 160.
  • the switches 680 (1), 680 (3), and 680 (5) are controlled to be turned on or off by a switch control signal 690 (1) output from the scanning line driving device 630.
  • the switches 680 (2), 680 (4), and 680 (6) are controlled to be turned on or off by a switch control signal 690 (2) output from the scanning line driving device 630.
  • FIG. 10 is a timing chart for explaining the operation of the display device according to the third embodiment. Elements similar to those in FIG. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the scanning line driving device 630 sequentially applies scanning signals indicating enable states to the scanning signal lines 150 (1) to 150 (4). Output.
  • the scanning signal in the enabled state is output to the scanning signal line 150 (1) by the scanning line driving device 630.
  • the scanning line driving device 630 outputs the scanning signal in the enabled state to the scanning signal line 150 (2).
  • the display panel driving device 620 uses the driving circuit 621 (1) to the driving circuit 621 (3) to display the display data signal line 640 (A) to the display data signal line 640 (C).
  • the display data signal is output.
  • the scanning line driving device until the scanning signal in the enabled state is output to the scanning signal line 150 (3) (from time t1 to time t3, from time t5 to time t7), the scanning line driving device.
  • the switch control signal 690 (1) output by 630 is enabled, and the switch control signal 690 (2) is disabled. That is, the switch 680 (1), the switch 680 (3), and the switch 680 (5) are in an enabled state until a scanning signal in an enabled state is output to the scanning signal line 150 (3), and the switch 680 (2 ), Switch 680 (4), and switch 680 (6) are disabled.
  • the display data signal line 640 (A) to the display data signal line 640 (C) are connected to the display element 160 (3) and the display element 160 from time t1 to time t3 (and from time t5 to time t7).
  • the display element 160 (7), the display element 160 (8), the display element 160 (11), and the display element 160 (12) are not connected.
  • the display element 160 (1), the display element 160 (2), the display element 160 (5), the display element 160 (6), the display element 160 (9), and the display element 160 (10) Display data signal) is supplied.
  • the scanning line driving device 630 outputs the scanning signal in the enabled state to the scanning signal line 150 (3).
  • the scanning line driving device 630 outputs the scanning signal in the enabled state to the scanning signal line 150 (4).
  • the display panel driving device 620 uses the driving circuit 621 (1) to the driving circuit 621 (3) to display the display data signal line 640 (A) to the display data signal line 640 (C).
  • the display data signal is output.
  • the scanning line driving device until the scanning signal in the enabled state is output to the scanning signal line 150 (1) (from time t3 to time t5, from time t7 to time t9), the scanning line driving device.
  • the switch control signal 690 (1) output by 630 is disabled, and the switch control signal 690 (2) is enabled.
  • the switch 680 (1), the switch 680 (3), and the switch 680 (5) are disabled until the enable scanning signal is output to the scanning signal line 150 (1), and the switch 680 is disabled.
  • (2), switch 680 (4), and switch 680 (6) are enabled.
  • the display data signal line 640 (A) to the display data signal line 640 (C) are connected to the display element 160 (1) and the display element 160 from time t3 to time t5 (and from time t7 to time t9).
  • the display element 160 (5), the display element 160 (6), the display element 160 (9), and the display element 160 (10) are not connected.
  • the display element 160 (3), the display element 160 (4), the display element 160 (7), the display element 160 (8), the display element 160 (11), and the display element 160 (12) (Display data signal) is supplied.
  • the wiring capacitance added to the display data signal line 640 (A) to the display data signal line 640 (C), that is, the display data signal line 640 (1) to the display data signal line 640 (6) is time-sequentially. Can be reduced.
  • the signal lines for supplying the switch control signal 690 can be gathered in one place, which is advantageous for reducing the area. For example, it is useful when it is not desired to wire signal lines for supplying the switch control signal 690 adjacent to (in parallel with) the scanning signal lines 150 (1) to 150 (4). Further, for example, it is useful when there is no room in the horizontal wiring space where the scanning signal lines 150 are wired, but there is room in the vertical direction where the display data signal lines 640 are wired.
  • the present invention is not limited to this. There is no particular problem even if the switches 680 (1) to 680 (6) are formed other than the display panel 670. That is, the switches 680 (1) to 680 (6) may be configured as external components. In that case, the current capability, shape, and location of the switches 680 (1) to 680 (6) can be flexibly dealt with, so there is a cost merit such as a reduction in area.
  • switches 680 (1) to 680 (6) may be formed on the display panel 670 with the same configuration as in the first and second embodiments.
  • FIG. 11 is a diagram illustrating a configuration of the display device according to the fourth embodiment.
  • a display device 700 illustrated in FIG. 11 includes a drive device control circuit 110, a display panel drive device 720, a scanning line drive device 230, and a display panel 770. Elements similar to those in FIGS. 1, 3, and 9 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the display panel 770 does not include the above-described switch, and the configuration is different in that the display panel driving device 720 includes the switches 780 (1) to 780 (6).
  • the scanning line driving device 230 is the same as that shown in FIG.
  • the display panel drive device 720 includes drive circuits 621 (1) to 621 (3) and switches 780 (1) to 780 (6). Further, the display panel driving device 720 outputs a switch control signal 790 for controlling the switches 780 (1) to 780 (6) to be on or off.
  • the driving circuits 621 (1) to 621 (3) are connected to the corresponding display data signal lines 640 (A) to 640 (C), respectively.
  • the driver circuits 621 (1) to 621 (3) output display data signals to the corresponding display data signal lines 640 (1) to 640 (6), respectively.
  • the display data signal line 640 (A) is branched into the display data signal line 640 (1) and the display data signal line 640 (2) on the display panel driving device 720 as shown in FIG. Yes.
  • the display data signal line 640 (B) is branched into a display data signal line 640 (3) and a display data signal line 640 (4).
  • the display data signal line 640 (C) is branched into a display data signal line 640 (5) and a display data signal line 640 (6).
  • Switch 780 (1) to switch 780 (6) are for electrically disconnecting display data signal line 640 (1) to display data signal line 640 (6), respectively, as in FIG.
  • the switches 780 (1), 780 (3), and 780 (5) are controlled to be turned on or off by a switch control signal 790 (1) output from the display panel driving device 720.
  • the switch 780 (2), the switch 780 (4), and the switch 780 (6) are controlled to be turned on or off by a switch control signal 790 (2) output from the display panel driving device 720.
  • the display device 700 is configured.
  • the switch 780 is formed on the display panel 770 such as an amorphous silicon TFT
  • the current capacity of the transistor is increased by 1000 times or more when the switch 780 is formed on the display panel driving device 720.
  • the configuration in which the switch 780 is formed in the display panel driving device 720 can reduce the area because the space for arranging the external component can be omitted even when the switch 780 is configured by the external component. There are cost advantages.
  • the switch control signal 790 (1) and the switch control signal 790 (2) are formed and output in the display panel driving device 720.
  • the present invention is not limited to this.
  • the control may be performed by outputting from a driving device control circuit or a scanning line driving device.
  • FIG. 12 is a timing chart showing the operation of the display device in the fourth embodiment.
  • the operation of the display device 700 shown in FIG. 12 is the same as the operation of the display device 600 shown in FIG. This is because the switch control signal 790 (1) and the switch control signal 790 (2) are output from the display panel driving device 720 in the operation of the display device 700 shown in FIG. For it.
  • the switch control signal 690 (1) and the switch control signal 690 (2) are output from the scanning line driving device 630.
  • FIG. 12 and FIG. 10 differ only in this point, and the operation is the same.
  • FIG. 13 is a diagram illustrating a configuration of a display device according to the first modification of the fourth embodiment.
  • a display device 800 illustrated in FIG. 13 includes a drive device control circuit 110, a display panel drive device 820, a scanning line drive device 230, and a display panel 770. 1, 3, 9, and 11 are denoted by the same reference numerals, and detailed description thereof is omitted.
  • the display panel drive device 820 controls the drive circuit for adjusting the current capability of the drive circuits 621 (1) to 621 (3) with respect to the display panel drive device 720 of the fourth embodiment.
  • the difference is that a signal line 850 is provided.
  • the display device 800 configured as described above, by supplying a drive circuit control signal via the drive circuit control signal line 850, the current capability of the drive circuits 621 (1) to 621 (3) is increased. It can be adjusted appropriately. As a result, it is possible to further reduce power consumption and to realize low heat generation. In addition, lower EMI can be realized than lower power consumption.
  • the drive capacity is adjusted in accordance with the drive load capacity.
  • a drive circuit control signal is supplied via a circuit control signal line 850. Thereby, the current capability of the drive circuits 621 (1) to 621 (3) is appropriately adjusted.
  • switch control signal 790 (1) and the switch control signal 790 (2) output by the display panel driving device 820 are respectively in a disabled state and an enabled state; that is, the switch 780 (1) and the switch 780 ( 3)
  • the switch 780 (5) is set to a disabled state (non-conductive state, off state), and the switch 780 (2), the switch 780 (4), and the switch 780 (6) are enabled (conductive state, Set to ON).
  • the load capacitances driven by the drive circuits 621 (1) to 621 (3) are different, by supplying the drive circuit control signal via the drive circuit control signal line 850, the drive load capacitance is increased.
  • the current capability of the drive circuits 621 (1) to 621 (3) is adjusted appropriately. Thereby, low power consumption can be achieved, and low heat generation can be realized. In addition, lower EMI can be realized than lower power consumption.
  • the drive circuit control signal line 850 connected (wired) to the drive circuits 621 (1) to 621 (3) has been described as one, but the present invention is not limited to this.
  • the switch 780 is provided between the display element 160 (1), the display element 160 (5), the display element 160 (9), the display element 160 (2), the display element 160 (6), and the display element 160 (10). It is good.
  • the load capacity pattern driven by the drive circuits 621 (1) to 621 (3) increases. Therefore, the current capability of the drive circuits 621 (1) to 621 (3) may be adjusted by increasing the number of drive circuit control signal lines 850 accordingly.
  • a switch is provided between the display element 160 (3), the display element 160 (7), the display element 160 (11), the display element 160 (4), the display element 160 (8), and the display element 160 (12). Also good.
  • the pattern of the load capacitance driven by the drive circuits 621 (1) to 621 (3) increases, so that the number of drive circuit control signal lines 850 is increased accordingly, and the drive circuit The current capability of 621 (1) to drive circuit 621 (3) may be adjusted.
  • the display device of the present invention has been described above based on the embodiment, but the present invention is not limited to this embodiment. Unless it deviates from the meaning of this invention, the form which carried out the various deformation
  • the display device according to the present invention has been described mainly with a liquid crystal display, but is not limited thereto.
  • An organic EL display or a PDP display may be used, and similar effects can be achieved.
  • the switch according to the present invention has been described as being formed by, for example, an amorphous silicon TFT, LTPS-TFT, or HTPS-TFT (High Temperature Polycrystalline Silicon TFT), but is not limited thereto.
  • a ⁇ Si-TFT or a TFT formed of another material may be used.
  • the display data signal lines are not formed on the display panel, they may not be TFTs, and may be semiconductor switches or mechanical S / Ws as long as the display data signal lines can be electrically disconnected.
  • the present invention can be used for a display device, and in particular, for a display device such as a liquid crystal display, an organic EL display, or a PDP display that has various driving methods and needs to realize low heat generation.
  • a display device such as a liquid crystal display, an organic EL display, or a PDP display that has various driving methods and needs to realize low heat generation.
  • Display device 110 100, 200, 300, 400, 500, 600, 700, 800, 900 Display device 110, 310, 910 Drive device control circuit 111, 911 First control signal 112, 912 Second control signal 120, 220, 620, 720, 820, 920 Display panel driver 130, 230, 430, 630, 930 Scan line driver 140, 640 Display data signal line 150 Scan signal line 160, 960 Display element 170, 270, 370, 470, 570, 670, 770, 970 Display panel 180, 480, 680, 780, 980 Switch 190, 290, 390, 490, 690, 790 Switch control signal 621, 921 Drive circuit 850 Drive circuit control signal line 940 Display data signal 950 Scan signal

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

L'invention concerne un dispositif d'affichage capable de supprimer la génération de chaleur et l'augmentation de consommation électrique indépendamment du procédé de commande d'un panneau d'affichage, comprenant : un panneau d'affichage (170) doté d'une pluralité d'éléments d'affichage (160) disposés en forme de matrice ; une pluralité de lignes de signaux de balayage (150) utilisées de façon à correspondre à la pluralité de rangées parmi la pluralité d'éléments d'affichage (160), et fournissant des signaux de balayage pour commander la pluralité d'éléments d'affichage (160) dans la rangée correspondante ; une pluralité de lignes de signaux de données d'affichage (140) utilisés de façon à correspondre à la pluralité de rangées parmi la pluralité d'éléments d'affichage (160), et fournissant des signaux de données pour déterminer la lumière et l'obscurité de chaque élément d'affichage de la pluralité d'éléments d'affichage (160) dans la colonne correspondante ; et un commutateur (180) utilisé dans au moins une ligne de signaux de données d'affichage (140) parmi la pluralité de lignes de signaux de données d'affichage (140), pour couper électriquement une partie de la pluralité des éléments d'affichage (160).
PCT/JP2011/004367 2010-08-04 2011-08-02 Dispositif d'affichage Ceased WO2012017640A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2010175655 2010-08-04
JP2010-175655 2010-08-04

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WO2012017640A1 true WO2012017640A1 (fr) 2012-02-09

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WO (1) WO2012017640A1 (fr)

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CN103839523A (zh) * 2012-11-20 2014-06-04 北京京东方光电科技有限公司 一种降低液晶面板功耗的装置及方法
WO2020194493A1 (fr) * 2019-03-26 2020-10-01 シャープ株式会社 Dispositif d'affichage
CN114141135A (zh) * 2020-09-04 2022-03-04 乐金显示有限公司 显示装置
WO2022203436A1 (fr) * 2021-03-25 2022-09-29 신준모 Dispositif d'affichage

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JPH04322216A (ja) * 1991-04-23 1992-11-12 Hitachi Ltd 液晶表示装置
JP2000098930A (ja) * 1998-06-10 2000-04-07 Matsushita Electric Ind Co Ltd ディスプレイデバイス
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CN103839523A (zh) * 2012-11-20 2014-06-04 北京京东方光电科技有限公司 一种降低液晶面板功耗的装置及方法
US9548032B2 (en) 2012-11-20 2017-01-17 Beijing Boe Optoelectronics Technology Co., Ltd. Apparatus for reducing power consumption of liquid crystal panel and method for the same
WO2020194493A1 (fr) * 2019-03-26 2020-10-01 シャープ株式会社 Dispositif d'affichage
US11532277B2 (en) 2019-03-26 2022-12-20 Sharp Kabushiki Kaisha Display device having a plurality of data lines for driving a plurality of display regions
CN114141135A (zh) * 2020-09-04 2022-03-04 乐金显示有限公司 显示装置
JP2022043990A (ja) * 2020-09-04 2022-03-16 エルジー ディスプレイ カンパニー リミテッド 表示装置
EP3965094A3 (fr) * 2020-09-04 2022-05-25 LG Display Co., Ltd. Dispositif d'affichage
TWI797703B (zh) * 2020-09-04 2023-04-01 南韓商樂金顯示科技股份有限公司 顯示器裝置
JP7269996B2 (ja) 2020-09-04 2023-05-09 エルジー ディスプレイ カンパニー リミテッド 表示装置
WO2022203436A1 (fr) * 2021-03-25 2022-09-29 신준모 Dispositif d'affichage

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