WO2007055047A1 - 表示装置およびそれを備える電子機器 - Google Patents
表示装置およびそれを備える電子機器 Download PDFInfo
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- WO2007055047A1 WO2007055047A1 PCT/JP2006/311319 JP2006311319W WO2007055047A1 WO 2007055047 A1 WO2007055047 A1 WO 2007055047A1 JP 2006311319 W JP2006311319 W JP 2006311319W WO 2007055047 A1 WO2007055047 A1 WO 2007055047A1
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- Prior art keywords
- circuit
- input
- panel
- output terminal
- display device
- Prior art date
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Classifications
-
- 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
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0223—Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
Definitions
- the present invention relates to a display device, and more particularly to a display device having a panel on which an electric circuit such as a CG silicon liquid crystal panel is formed, and an electronic apparatus including the display device.
- CG silicon liquid crystal panel is a liquid crystal panel that employs TFT (Thin Film Transistor) made of CG silicon film as a switching element.
- TFT Thin Film Transistor
- CG silicon has a regular arrangement of crystal interfaces and a continuous structure at the atomic level. For this reason, electrons can move at high speed in CG silicon, so that an integrated circuit for driving can be mounted on the substrate of the liquid crystal panel. As a result, costs are reduced by reducing the number of necessary parts, and miniaturization of equipment is progressing.
- CG silicon liquid crystal display device referred to as a “CG silicon liquid crystal display device”.
- CG silicon liquid crystal display device mounting methods include the COG (Chip On Glass) method, in which an IC chip is mounted directly on the glass substrate of the liquid crystal panel, and the FPC (Flexible Printed Circuit: FPC).
- the COF (Chip On Film) system mounted on the top is known.
- a CG silicon liquid crystal display device adopting the COG method for example, a liquid crystal controller and a source driver (video signal line drive circuit) are formed in an LSI mounted on a glass substrate, and a gate driver (scanning) is formed on the liquid crystal panel.
- a display device in which a signal line driver circuit) is formed.
- a CG silicon liquid crystal display device adopting the COF method, for example, there is a display device in which a liquid crystal controller is formed in an LSI mounted on an FPC, and a gate driver and a source driver are formed on the liquid crystal panel. .
- FIG. 12 is an equivalent circuit diagram showing a configuration of a part of a liquid crystal panel of a conventional CG silicon liquid crystal display device.
- an electric circuit hereinafter referred to as “in-panel electric circuit” 110 is formed on the liquid crystal panel 10.
- the electrical circuit 110 in the panel and the liquid crystal panel A plurality of input / output terminals 300 are provided at the end of the liquid crystal panel 10 in order to exchange electrical signals with the outside of the panel 10.
- These input / output terminals 300 are connected to electronic elements such as TFT 111 of the in-panel electric circuit 110.
- the input / output terminal 300 provided at the end of the liquid crystal panel 10 is not insulated in order to enable electrical connection with the outside of the liquid crystal panel 10.
- the electrodes of the input / output terminal 300 are exposed to the outside.
- the input / output terminal 300 receives external static electricity, and the static electricity in the panel 110 may be damaged by the static electricity.
- FIG. 12 when the input / output terminal 300 is subjected to static electricity, the voltage of the input / output terminal 300 becomes high and the gate terminal of the TFT 111 is destroyed. As a result, a current flows from the input / output terminal 300 to the gate terminal of the TFT 111. It is called “electrostatic breakdown” that an electric circuit is destroyed by static electricity in this way.
- FIG. In-panel protection circuit ”) 120 is provided.
- a DCZDC converter 40 that generates a power supply voltage for driving the liquid crystal panel 10 is provided, and two types of power supply voltages are applied to the liquid crystal panel 10 from the DCZDC converter 40! / Of these two types of power supply voltages, the power supply voltage with the higher potential (hereinafter referred to as the “high potential power supply voltage”) VDD is supplied to the high potential power supply voltage line 38 from the input / output terminal 310. .
- the power supply voltage having the lower potential (hereinafter referred to as “low potential side power supply voltage”) VSS is supplied to the low potential side power supply voltage line 39 from the input / output terminal 320.
- VSS the power supply voltage having the lower potential
- the in-panel protection circuit 120 signal lines connecting the input / output terminal 300 and the in-panel electric circuit 110 are connected to two diodes 121 and 122, respectively. More specifically, the signal lines connecting the input / output terminal 300 and the in-panel electric circuit 110 are connected to the anode of the diode 121 and the force sword of the diode 122, respectively.
- the force sword of the diode 121 is connected to the high potential side power supply voltage line 38, and the anode of the diode 122 is connected to the low potential side power supply voltage line 39.
- Patent Document 1 Japanese Unexamined Patent Publication No. 9-80471
- the input / output terminal 300 in the liquid crystal panel 10 may receive a large amount of static electricity.
- electrostatic breakdown can be prevented by the above-described protection circuit 120 in the panel.
- only the above-mentioned protection circuit 120 in the panel is provided. Thus, the occurrence of electrostatic breakdown cannot be prevented.
- an object of the present invention is to increase the electrostatic withstand voltage of a display device and suppress the breakdown of an electric circuit formed in the panel due to static electricity.
- a first aspect of the present invention is a display device
- a display panel having an image display unit, an electric circuit, and an input / output terminal for receiving a predetermined electric signal to be given to the electric circuit;
- the integrated circuit includes a first protection circuit for discharging static charge applied to the input / output terminal.
- a second aspect of the present invention is the first aspect of the present invention
- the electric circuit includes a driving circuit for displaying the image on the display unit, and the integrated circuit controls an operation of the driving circuit.
- a third aspect of the present invention provides, in the first aspect of the present invention,
- the electrical circuit includes a power supply circuit for operating a predetermined circuit included in the display panel.
- a fourth aspect of the present invention is the first aspect of the present invention.
- the display panel further includes a second protection circuit for discharging an electrostatic charge applied to the input / output terminal.
- a fifth aspect of the present invention is the fourth aspect of the present invention.
- the input / output terminal is connected to the first protection circuit and the second protection circuit.
- a sixth aspect of the present invention is the fourth aspect of the present invention.
- the first protection circuit is connected to the input / output terminal and the second protection circuit.
- a seventh aspect of the present invention is the first aspect of the present invention.
- the display panel includes a glass substrate,
- the integrated circuit is mounted on the glass substrate.
- An eighth aspect of the present invention is the first aspect of the present invention.
- the drive circuit is constituted by a thin film transistor using continuous grain boundary crystalline silicon.
- a tenth aspect of the present invention is the second aspect of the present invention.
- the drive circuit is composed of a thin film transistor using amorphous silicon.
- An eleventh aspect of the present invention is the second aspect of the present invention.
- the drive circuit is constituted by a thin film transistor using polysilicon.
- a twelfth aspect of the present invention is an electronic device,
- a display panel including a display unit for displaying an image, an electric circuit, and an input / output terminal for receiving a predetermined electric signal to be given to the electric circuit;
- the integrated circuit includes a first protection circuit for discharging static charge applied to the input / output terminal.
- a thirteenth aspect of the present invention is the twelfth aspect of the present invention.
- the electric circuit includes a driving circuit for displaying the image on the display unit, and the integrated circuit controls an operation of the driving circuit.
- a fourteenth aspect of the present invention is the twelfth aspect of the present invention.
- the electrical circuit includes a power supply circuit for operating a predetermined circuit included in the display panel.
- a fifteenth aspect of the present invention is the twelfth aspect of the present invention.
- the display panel further includes a second protection circuit for discharging an electrostatic charge applied to the input / output terminal.
- a sixteenth aspect of the present invention is the fifteenth aspect of the present invention.
- the input / output terminal is connected to the first protection circuit and the second protection circuit.
- a seventeenth aspect of the present invention is the fifteenth aspect of the present invention.
- the first protection circuit is connected to the input / output terminal and the second protection circuit.
- An eighteenth aspect of the present invention is the twelfth aspect of the present invention.
- the display panel includes a glass substrate,
- the integrated circuit is mounted on the glass substrate.
- a nineteenth aspect of the present invention is the twelfth aspect of the present invention.
- the drive circuit is constituted by a thin film transistor using continuous grain boundary crystalline silicon.
- the drive circuit is composed of a thin film transistor using amorphous silicon.
- the drive circuit is constituted by a thin film transistor using polysilicon.
- the static charge is discharged by the first protection circuit provided in the integrated circuit.
- static electricity has been discharged by a protection circuit provided in the display panel. Therefore, it is possible to suppress the electrostatic breakdown of the electric circuit in the display panel while simplifying the circuit configuration in the display panel as compared with the conventional case.
- the input / output terminal of the display panel receives static electricity, it is possible to suppress electrostatic breakdown of the drive circuit.
- the input / output terminals of the display panel receive static electricity, it is possible to suppress electrostatic breakdown of the power supply circuit.
- the static charge is generated in the display panel and the first protection circuit provided in the integrated circuit. It is discharged with the second protection circuit provided in the.
- the discharge for preventing the electrostatic breakdown of the electric circuit in the display panel is performed not only by the protection circuit provided in the display panel but also by the protection circuit provided in the integrated circuit. . For this reason, even if the input / output terminals of the display panel receive a large amount of static electricity, the charges are dispersed, and the electrostatic withstand voltage of the entire display device is increased. This suppresses the occurrence of failures due to electrostatic breakdown of the electric circuit in the display panel.
- the fifth aspect of the present invention when the input / output terminal of the display panel receives static electricity, The electrostatic charge is distributed to the first protection circuit and the second protection circuit. For this reason, as in the fourth aspect of the present invention, the electrostatic withstand voltage of the entire display device is increased, and the occurrence of failures due to electrostatic breakdown of the electric circuit in the display panel is suppressed.
- the electrostatic charge is first discharged by the second protection circuit, and further, the first protection circuit Is discharged. For this reason, as in the fourth aspect of the present invention, the electrostatic withstand voltage of the entire display device is increased, and the occurrence of a failure due to electrostatic breakdown of the electric circuit in the display panel is suppressed.
- the seventh aspect of the present invention in a display device adopting a COG method as a mounting method, it is possible to suppress the occurrence of a failure due to electrostatic breakdown of an electric circuit in the display panel. .
- the eighth aspect of the present invention in a display device adopting a COF method as a mounting method, it is possible to suppress the occurrence of a failure due to electrostatic breakdown of an electric circuit in the display panel. .
- a failure due to electrostatic breakdown of an electric circuit in the display panel is generated. Can be suppressed.
- continuous grain boundary crystalline silicon can move electrons at high speed, it is possible to reduce costs by reducing the number of necessary parts and downsize the equipment.
- an electronic apparatus capable of suppressing the occurrence of a failure due to electrostatic breakdown of an electric circuit in the display panel is realized.
- FIG. 1 shows an in-panel protection circuit, an LSI protection circuit, and a protection circuit according to a first embodiment of the present invention. It is an equivalent circuit diagram showing a detailed configuration of the peripheral circuit.
- FIG. 2 is a block diagram showing an overall configuration of an analog full monolithic CG silicon liquid crystal display device according to the first embodiment.
- FIG. 3 is a block diagram for explaining input / output terminals of a liquid crystal panel in a conventional CG silicon liquid crystal display device.
- FIG. 4 is a block diagram showing a configuration of a modified example of the first embodiment.
- FIG. 5 is a block diagram showing an overall configuration of a monolithic CG silicon liquid crystal display device according to a second embodiment of the present invention.
- FIG. 6 is a diagram for explaining a connection between a liquid crystal panel and an LSI in the second embodiment.
- FIG. 7 is a diagram for explaining a connection between a liquid crystal panel and an LSI in the second embodiment.
- FIG. 8 is an equivalent circuit diagram showing a detailed configuration of the in-panel protection circuit, the in-LSI protection circuit, and its peripheral circuits in the second embodiment.
- FIG. 9 is an equivalent circuit diagram showing a detailed configuration of an in-LSI protection circuit and its peripheral circuits in a modification of the second embodiment.
- FIG. 10A is a block diagram showing an example of a configuration in a liquid crystal display device in which a COG method is adopted as a mounting method.
- B is a block diagram showing another example of the configuration of a liquid crystal display device in which the COG method is adopted as a mounting method.
- FIG. 11A is a block diagram showing an example of a configuration in a liquid crystal display device in which a COG method or a COF method is adopted as a mounting method.
- B is a block diagram showing another example of a configuration of a liquid crystal display device in which a COG method or a COF method is adopted as a mounting method.
- FIG. 12 is an equivalent circuit diagram showing a partial configuration of a liquid crystal panel of a conventional CG silicon liquid crystal display device.
- FIG. 13 is a diagram for explaining input / output terminals provided in the liquid crystal panel.
- It is an equivalent circuit diagram showing a configuration of a protection circuit in a conventional CG silicon liquid crystal display device. Explanation of symbols
- FIG. 2 is a block diagram showing the overall configuration of the analog full monolithic CG silicon liquid crystal display device according to the first embodiment of the present invention.
- This liquid crystal display device includes a liquid crystal panel 10 and an FPC 20 as a display panel, and a COF method is adopted as a mounting method.
- the liquid crystal panel 10 includes two glass substrates that sandwich a liquid crystal layer, and includes a display unit 100 that displays an image including a gate bus line (scanning signal line), a source bus line (video signal line), a pixel electrode, and the like.
- In-panel electric circuit 110 including a gate driver (scanning signal line driving circuit) for driving the gate bus line and a source driver (video signal line driving circuit) for driving the source bus line, and electrostatic in the electric circuit 110 in the panel In-panel protection circuit 120 as a second protection circuit for protecting against destructive power.
- An LSI 200 is mounted on the FPC20.
- the LSI 200 has a liquid crystal controller 210 for controlling the operation of the gate driver and source driver.
- LSI200 is also the first protection As a circuit, in addition to the in-panel protection circuit 120, a circuit 220 (hereinafter referred to as “in-LSI protection circuit”) 220 for protecting the in-panel electric circuit 110 from electrostatic breakdown is provided.
- the liquid crystal panel 10 includes a terminal portion 30 having a plurality of input / output terminal forces for electrically connecting the in-panel electric circuit 110 and the LSI 200.
- an in-panel protection circuit 120 is provided between the terminal portion 30 and the in-panel electric circuit 110.
- an in-LSI protection circuit 220 is provided between the terminal portion 30 of the liquid crystal panel 10 and the liquid crystal controller 210.
- FIG. 1 is an equivalent circuit diagram showing a detailed configuration of the in-panel protection circuit 120, the in-LSI protection circuit 220, and its peripheral circuits.
- This liquid crystal display device includes a DCZDC converter 40 that generates two types of power supply voltages VD Dl and VSS1.
- the terminal 30 of the liquid crystal panel 10 includes a plurality of input / output terminals 300 for electrically connecting the in-panel electric circuit 110 and the LSI 200, and power supply voltages VDD1 and VSS1 generated by the DCZDC converter 40 to the liquid crystal panel. 10 and input / output terminals 310 and 320 for supply to the inside.
- first high-potential side power supply voltage VDD1J the higher power supply voltage of the above two types of power supply voltage is referred to as “first high-potential side power supply voltage VDD1J, and the lower power supply voltage is referred to as“ first low-potential side power supply voltage VDD1J ”.
- Power supply voltage VSS1 the higher power supply voltage of the above two types of power supply voltage is referred to as “first high-potential side power supply voltage VDD1J, and the lower power supply voltage is referred to as“ first low-potential side power supply voltage VDD1J ”.
- Power supply voltage VSS1 Power supply voltage
- the liquid crystal panel 10 also includes a first high potential side power supply voltage line for supplying the first high potential side power supply voltage VDD1 given to the input / output terminal 310 to the electric circuit in the liquid crystal panel 10. 48 and a first low-potential-side power supply voltage line 49 for supplying the first low-potential-side power supply voltage VSS1 applied to the input / output terminal 320 to the electric circuit in the liquid crystal panel 10 is provided. .
- signal lines connecting the input / output terminal 300 and the in-panel electric circuit 110 are connected to two diodes 121 and 122, respectively. More specifically, the signal lines connecting the input / output terminal 300 and the in-panel electric circuit 110 are connected to the anode of the diode 121 and the force sword of the diode 122, respectively.
- the power sword of the diode 121 is connected to the first high potential side power supply voltage line 48 and the diode 122
- the anode is connected to the first low potential side power supply voltage line 49.
- two types of power supply voltages VDD 2 and VSS 2 are applied to the LSI 200.
- the higher power supply voltage of the two types of power supply voltage is referred to as “second high-potential-side power supply voltage VDD2J
- the lower power supply voltage is referred to as“ second low-potential-side power supply voltage ”.
- Power supply voltage VSS 2 The LSI 200 supplies the second high potential side power supply voltage line 28 for supplying the second high potential side power supply voltage VDD2 to the electric circuit in the LSI 200 and the second low potential side power supply voltage VSS2 to the LSI200.
- a second low potential side power supply voltage line 29 is provided for supplying to the internal electric circuit.
- signal lines connecting the input / output terminal 300 and the liquid crystal controller 210 are connected to two diodes 221 and 222, respectively. More specifically, the signal lines connecting the input / output terminal 300 and the liquid crystal controller 210 are connected to the anode of the diode 221 and the force sword of the diode 222, respectively.
- the force sword of the diode 222 is connected to the second high potential side power supply voltage line 28, and the anode of the diode 222 is connected to the second low potential side power supply voltage line 29.
- the potential of the input / output terminal 300 rises.
- a forward voltage is applied to the diode 121
- a part of the positive charge caused by static electricity flows from the input / output terminal 300 to the first high potential side power supply voltage line 48.
- a forward voltage is applied to the diode 221
- a part of positive charges caused by static electricity flows from the input / output terminal 300 to the second high potential side power supply voltage line.
- FIG. 3 is a block diagram for explaining input / output terminals provided on the liquid crystal panel 10 of the CG silicon liquid crystal display device.
- the input / output terminals of the liquid crystal panel 10 are conventionally inspected with the input / output terminal 303 for operating the display device in combination with the liquid crystal panel 10 and the LSI 200, and the liquid crystal panel 10 alone.
- input / output terminals 301 and 302 for inspection.
- the inspection input / output terminals 301 and 302 are not connected to the LSI 200 because they are not used when the display device is actually driven.
- Such inspection input / output terminals 301 and 302 are generally fixed to a predetermined potential such as a floating state or a ground potential.
- the inspection input / output terminals 301 and 302 as described above may also receive static electricity.
- the input / output terminals 301 and 302 for inspection and the protection circuit 220 in the LSI are A connected configuration may be used. Accordingly, electrostatic breakdown of the in-panel electric circuit 110 can be effectively suppressed even when the inspection input / output terminals 301 and 302 receive static electricity.
- FIG. 5 is a block diagram showing an overall configuration of a monolithic CG silicon liquid crystal display device according to the second embodiment of the present invention.
- This liquid crystal display device includes a liquid crystal nonel 10 and an FPC 20 as a display panel, and a COG method is adopted as a mounting method.
- the liquid crystal panel 10 includes two glass substrates sandwiching a liquid crystal layer, and includes a display unit 100 that displays an image including a gate bus line, a source bus line, a pixel electrode, and the like, and a gate driver that drives the gate bus line.
- an in-panel electrical circuit 110, and an in-panel protection circuit 120 as a second protection circuit for protecting the in-panel electrical circuit 110 from electrostatic breakdown.
- an LSI 200 is mounted on the liquid crystal panel 10.
- the LSI 200 includes an in-LSI protection circuit 220, a control unit 230, and a DCZDC converter 240 for protecting the in-panel electrical circuit 110 from electrostatic breakdown separately from the in-panel protection circuit 120.
- the control unit 230 includes a source driver that drives the source bus line, and a display control circuit that controls the operation of the source driver and the operation of the gate driver in the electrical circuit 110 in the panel.
- the liquid crystal panel 10 includes a terminal portion 30 that also has a plurality of input / output terminal forces for electrically connecting the LSI 200 and the signal wiring formed on the FPC 20.
- a line sequential drive system is adopted as the drive system.
- the input / output terminals in the terminal section 30 and the LSI protection circuit 220 are connected. Further, the LSI protection circuit 220 and the panel protection circuit 120 are connected. Further, the in-panel protection circuit 120 and the in-panel electrical circuit 110 are connected.
- the connection between the liquid crystal panel 10 and the LSI 200 in the liquid crystal display device adopting the COG method as a mounting method will be described with reference to FIG. 6 and FIG.
- the LSI 200 is provided with a plurality of bumps 50.
- bump 50 Is made of gold.
- An ACF Anisotropic Conductive Film
- the electrode on the liquid crystal panel 10 and the electrode on the LSI 200 are electrically connected.
- FIG. 7 the electric circuit formed on the liquid crystal panel 10 and the LSI 200 are electrically connected.
- FIG. 8 is an equivalent circuit diagram showing a detailed configuration of the in-panel protection circuit 120, the in-LSI protection circuit 220, and its peripheral circuits.
- Two types of power supply voltages VDD and VSS are applied to the liquid crystal panel 10 of this liquid crystal display device.
- the higher power supply voltage of the two types of power supply voltage is referred to as the “high potential power supply voltage VDD”, and the lower power supply voltage is referred to as the “low potential power supply voltage VSS”.
- the terminal portion 30 of the liquid crystal panel 10 is provided with a plurality of input / output terminals 300 for electrically connecting the signal wiring formed on the FPC 20 and the LSI 200 and the high-potential side power supply voltage VDD to the LSI 200.
- the LSI 200 is provided with a plurality of bumps 50 for electrically connecting the LSI 200 and the in-panel electric circuit 110.
- the LSI 200 has a high-potential side power supply voltage line 51 in the LSI for connecting the input / output terminal 310 and the bump 50, and a low-potential side power supply voltage in the LSI for connecting the input / output terminal 320 and the bump 50. Line 52 is provided.
- the high potential side power supply voltage line 53 for supplying the high potential side power supply voltage VDD to the electric circuit in the liquid crystal panel 10 and the low potential side power supply voltage VSS are supplied.
- signal lines connecting the bump 50 and the in-panel electric circuit 110 are connected to two diodes 121 and 122, respectively. More specifically, the signal lines connecting the bump 50 and the in-panel electric circuit 110 are connected to the anode of the diode 121 and the force sword of the diode 122, respectively.
- the power sword of the diode 121 is connected to the high potential side power supply voltage line 53 in the panel, and the anode of the diode 122 is connected to the low potential side power supply voltage line 54 in the panel.
- the signal lines connecting the input / output terminals 300 and the bumps 50 are connected to two diodes 221 and 222, respectively.
- the signal lines connecting the input / output terminals 300 and the bumps 50 are connected to the anode of the diode 221 and the force sword of the diode 222, respectively.
- the power sword of the diode 221 is connected to the high potential side power supply voltage line 51 in the LSI, and the anode of the diode 222 is connected to the low potential side power supply voltage line 52 in the LSI.
- the static charge flows into the LSI protection circuit 220 and the panel protection circuit 120.
- the potential of the input / output terminal 300 rises and a forward voltage is applied to the diode 221
- positive charge flows to the high-potential-side power supply voltage line 51 in the LSI, and when a forward voltage is applied to the diode 121, the positive voltage is applied.
- FIG. 9 is an equivalent circuit diagram showing a detailed configuration of the in-LSI protection circuit 220 and its peripheral circuits according to a modification of the second embodiment.
- the in-panel protection circuit 120 is not provided. If sufficient electrostatic breakdown voltage can be obtained simply by providing the in-LSI protection circuit 220, the configuration in which the in-panel protection circuit 120 is omitted can be used as in this modification, and the cost can be reduced. .
- FIGS. 10A and 10B show configuration examples of a liquid crystal display device in which the COG method is adopted as the mounting method.
- FIGS. 11A and 11B show configuration examples of a liquid crystal display device in which a COG method or a COF method is adopted as a mounting method.
- the input / output terminal 300 and the in-LSI protection circuit 220 are connected, the in-LSI protection circuit 220 and the in-panel protection circuit 120 are connected, and the in-panel protection circuit 120 and the in-panel electric circuit 110 are connected.
- the in-panel electrical circuit 110 is protected from the static electricity received by the input / output terminal 300 by the in-LSI protection circuit 220 and the in-panel protection circuit 120.
- the input / output terminal 300 and the in-LSI protection circuit 220 are connected, and the in-LSI protection circuit 220 and the in-panel electrical circuit 110 are connected.
- the in-panel electrical circuit 110 is protected by the in-LSI protection circuit 220 from the static electricity received by the input / output terminal 300.
- this configuration reduces the cost.
- input / output terminal 300 and in-panel protection circuit 120 are connected, and in-panel protection circuit 120 and in-panel electrical circuit 110 are connected.
- the input / output terminal 300 and the LSI protection circuit 220 may be connected but not connected.
- the input / output terminal for inspection and the in-LSI protection circuit 220 are not connected, and the actually used input / output terminal and the in-LSI protection circuit 220 are connected.
- the in-panel electrical circuit 110 is protected from static electricity received by the input / output terminal 300 by the in-LSI protection circuit 220 and the in-panel protection circuit 120 in actual use.
- the input / output terminal 300 and the in-panel protection circuit 120 are connected.
- the input / output terminal 300 and the LSI protection circuit 220 may be connected or not connected.
- the input / output terminal for inspection and the protection circuit 220 in the LSI are not connected, and the input / output terminal actually used and the protection circuit 220 in the LSI can be connected.
- the in-panel electrical circuit 110 is protected by the in-LSI protection circuit 220 from the electrostatic force received by the input / output terminal 300. If sufficient electrostatic withstand voltage can be obtained only by providing the in-LSI protection circuit 220, this configuration can reduce the cost.
- the CG silicon liquid crystal display device has been described as an example.
- the present invention is not limited to this, and an electric circuit is formed on the display panel. It can be applied to display devices.
- the TFT in the gate driver may be formed of amorphous silicon or polysilicon.
- the present invention can also be applied to an electronic device including such a display device.
- a diode is used as a protective element in the protective circuit, but the present invention is not limited to this, and the protective circuit is formed by a protective element other than the diode. It may be configured. Also, the details in the protection circuit such as equipped with resistors There is no limit to the circuit configuration!
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2007544065A JPWO2007055047A1 (ja) | 2005-11-10 | 2006-06-06 | 表示装置およびそれを備える電子機器 |
CN200680042146.6A CN101305412B (zh) | 2005-11-10 | 2006-06-06 | 显示装置以及具有该显示装置的电子设备 |
US12/084,261 US20090128469A1 (en) | 2005-11-10 | 2006-06-06 | Display Device and Electronic Device Provided with Same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2005325605 | 2005-11-10 | ||
JP2005-325605 | 2005-11-10 |
Publications (1)
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WO2007055047A1 true WO2007055047A1 (ja) | 2007-05-18 |
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PCT/JP2006/311319 WO2007055047A1 (ja) | 2005-11-10 | 2006-06-06 | 表示装置およびそれを備える電子機器 |
Country Status (4)
Country | Link |
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US (1) | US20090128469A1 (ja) |
JP (1) | JPWO2007055047A1 (ja) |
CN (1) | CN101305412B (ja) |
WO (1) | WO2007055047A1 (ja) |
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JP2009282272A (ja) * | 2008-05-22 | 2009-12-03 | Mitsubishi Electric Corp | 表示装置 |
JP2021063912A (ja) * | 2019-10-15 | 2021-04-22 | セイコーエプソン株式会社 | 電気光学装置、電子機器および電気光学装置の検査方法 |
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JP2011066482A (ja) * | 2009-09-15 | 2011-03-31 | Sanyo Electric Co Ltd | 駆動回路 |
KR102342327B1 (ko) * | 2015-04-30 | 2021-12-24 | 삼성디스플레이 주식회사 | 표시장치 |
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JP2009282272A (ja) * | 2008-05-22 | 2009-12-03 | Mitsubishi Electric Corp | 表示装置 |
JP2021063912A (ja) * | 2019-10-15 | 2021-04-22 | セイコーエプソン株式会社 | 電気光学装置、電子機器および電気光学装置の検査方法 |
JP7415423B2 (ja) | 2019-10-15 | 2024-01-17 | セイコーエプソン株式会社 | 電気光学装置、電子機器および電気光学装置の検査方法 |
Also Published As
Publication number | Publication date |
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JPWO2007055047A1 (ja) | 2009-04-30 |
US20090128469A1 (en) | 2009-05-21 |
CN101305412A (zh) | 2008-11-12 |
CN101305412B (zh) | 2013-04-10 |
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