JP4599811B2 - Flat panel display - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a flat panel image display device such as a plasma display device known as a thin, lightweight display device having a large screen.
[0002]
[Prior art]
The plasma display device is capable of high-speed display compared to a liquid crystal panel, has a wide viewing angle, is easy to increase in size, and is self-luminous, so that the display quality is high, and so on. Recently, it has attracted particular attention among image display devices, and is used for various purposes as a display device in a place where many people gather or a display device for enjoying a large screen image at home.
[0003]
On the other hand, since a plasma display device is used for various applications as a large display device, an image signal including various information signals such as a personal computer, a television tuner, and a video is output to the signal input terminal structure. A configuration that can be connected to an external device is required.
[0004]
For this reason, in the plasma display device, various signal input terminals are inevitably provided so as to be connected to many external signal generation sources. However, from the general user side, all signal input terminals are used. There are few such usages, and most of them use only a specific external device connected. Therefore, some of the various signal input terminals installed so as to be compatible with various devices may be unnecessary.
[0005]
In addition, it is only necessary to manufacture a plurality of types of plasma display devices having signal input terminals according to the user. However, in the plasma display devices used for various applications as described above, a wide variety of products must be produced. Production efficiency will deteriorate.
[0006]
Therefore, as a plasma display device having a signal input terminal structure corresponding to the purpose of use by a user, as shown in Patent Document 1, a device in which a signal input terminal portion can be exchanged is considered and a patent application has been filed.
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2003-108026
[Problems to be solved by the invention]
By the way, in such a plasma display device, as in a normal electronic device, when an AC power cord is connected to a commercial AC power source, a standby device that supplies a voltage to a microcomputer (hereinafter referred to as a microcomputer) that controls the device. When the power supply starts operating and the main power switch is turned on, a voltage is supplied to the microcomputer to enter the standby state, and it is possible to turn on and off the relay of the main power circuit using a remote control or the like to drive the display. It becomes a state. That is, the state in which the relay is off is a general set standby state, and when the relay is turned on, the AC-DC converter of the power supply circuit starts to operate. For example, in the case of a plasma display device, the voltage required for panel driving In addition, a necessary voltage is supplied to the circuit board of the replaceable input signal circuit block.
[0009]
However, in such a configuration, not only circuit boards corresponding to various video sources in the analog / digital field but also circuit boards having various functions such as PC boards having communication functions such as LAN, There were the following problems. That is, a circuit board having a communication function such as a LAN needs to be supplied with power so that communication can be performed even when the set is in a standby state, and is compatible with a PC board and a plurality of circuit boards that require relatively high power. Since a capacity of about several tens of watts is required, there is a problem such as an increase in standby power in order to cope with this with a standby power source.
[0010]
The present invention makes it possible to easily provide a device having a signal input terminal structure that can flexibly cope with a plurality of types of image signals in a flat panel image display device such as a plasma display device. It is intended.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a flat panel display panel, a display drive circuit block for applying a signal to the display panel for display, an external device for outputting the display drive circuit block and an image signal, And an input signal circuit block having a board block that can be exchanged corresponding to an image signal, and a power supply circuit block that supplies a drive voltage to the display drive circuit block and the input signal circuit block, and The power supply circuit block starts the operation by connecting the AC power cord to a commercial AC power supply and the microcomputer for controlling the operation of the entire apparatus , and supplies the voltage to the microcomputer by turning on the main power switch. a standby power supply unit for supplying the voltage to the standby state Toshikatsu the board block Te, the My A AC-DC converter supplies the said display driving circuit block and the drive voltage to the input signal circuit block and the AC power supply of the commercial from the AC power cord supplied by a signal from Russia computer, the input signal circuit block When a voltage supply signal is sent from the board block to the microcomputer , a board power supply unit is provided that is supplied with commercial AC power from the AC power cord and supplies standby voltage to the board block. It is what.
[0012]
As a result, only when a board block that requires a standby voltage is mounted, by supplying a voltage, it is possible to support board blocks with various functions without increasing the power of a normal standby power supply. .
[0013]
DETAILED DESCRIPTION OF THE INVENTION
That is, the invention described in claim 1 of the present invention is a flat panel display panel, a display drive circuit block for applying a signal to the display panel for display, and an external for outputting the display drive circuit block and an image signal. An input signal circuit block having a board block connected to the device and exchangeable in correspondence with an image signal; and a power supply circuit block for supplying a drive voltage to the display drive circuit block and the input signal circuit block The power supply circuit block starts operation by connecting the AC power cord to a commercial AC power source and controls the operation of the entire apparatus, and turns on the main power switch to apply voltage to the microcomputer. a standby power supply unit for supplying the voltage to the standby state Toshikatsu the board block is supplied, before A AC-DC converter supplies the said display driving circuit block and the drive voltage to the input signal circuit block and the AC power supply of the commercial from the AC power cord supplied by a signal from the microcomputer, the input signal circuit block When a voltage supply signal is sent from the board block to the microcomputer , a board power supply unit is provided that is supplied with commercial AC power from the AC power cord and supplies standby voltage to the board block. It is what.
[0014]
According to a second aspect of the present invention, the board block includes a memory unit in which information data of a voltage supply signal for turning on the board power supply unit is written, and voltage supply is performed by mounting the board block on the input signal circuit block. It is characterized in that the microcomputer discriminates the information data of the signal and turns on the board power supply unit .
[0016]
Hereinafter, a flat panel image display device according to an embodiment of the present invention will be described using a plasma display device as an example with reference to FIGS. 1 to 8. However, the embodiment of the present invention is not limited to this. .
[0017]
First, a plasma display device will be described with reference to FIG. In FIG. 1, a housing that accommodates a flat display panel 1 is composed of a front frame 2 and a metal back cover 3, and the opening of the front frame 2 also serves to protect the optical filter and the display panel 1. A front cover 4 made of glass or the like is disposed. The front cover 4 is subjected to, for example, silver deposition in order to suppress unnecessary radiation of electromagnetic waves. Further, the back cover 3 is provided with a plurality of vent holes 3a for releasing heat generated in the display panel 1 or the like to the outside.
[0018]
The display panel 1 is held by adhering to the front surface of a chassis member 5 made of aluminum or the like via a heat conductive sheet 6, and a plurality of display panels 1 for driving the display panel 1 are displayed on the rear surface side of the chassis member 5. The circuit block 7 is attached. The heat conductive sheet 6 is for efficiently transferring the heat generated in the display panel 1 to the chassis member 5 to dissipate heat. Further, the circuit block 7 includes an electric circuit for performing display driving of the display panel 1 and controlling the display panel 1, and the edge portions of the four sides of the chassis member 5 are connected to the electrode leading portion drawn to the edge portion of the display panel 1. They are electrically connected by a plurality of flexible wiring boards (not shown) that extend beyond them.
[0019]
On the rear surface of the chassis member 5, a boss portion 7 a for attaching the circuit block 7 and fixing the back cover 3 is protruded by integral molding by die casting or the like. The chassis member 5 may be configured to be fixed to an aluminum flat plate with a fixing pin.
[0020]
FIG. 2 is a plan view showing the internal arrangement structure of the plasma display device having such a configuration with the back cover 3 removed, and in FIG. 2, the scan driver circuit block 10 has a predetermined signal voltage applied to the scan electrodes of the display panel 1. The sustain driver circuit block 11 supplies a predetermined signal voltage to the sustain electrode of the display panel 1, and the address driver circuit block 12 supplies a predetermined signal voltage to the address electrode of the display panel 1. The circuit block 10 and the sustain driver circuit block 11 are arranged at both ends in the width direction of the chassis member 5, and the address driver circuit block 12 is arranged at the upper end portion and the lower end portion in the height direction of the chassis member 5.
[0021]
The control circuit block 13 is based on an image signal sent from an input signal circuit block 14 having an input terminal portion to which a connection cable for connecting to an external device such as a television tuner or a personal computer is detachably connected. The data is converted into an image data signal corresponding to the number of pixels of the display panel 1 and supplied to the address driver circuit block 12, and a discharge control timing signal is generated and supplied to the scan driver circuit block 10 and the sustain driver circuit block 11, respectively. In addition, it performs display drive control such as gradation control, and is disposed at substantially the center of the chassis member 5.
[0022]
The power supply circuit block 15 supplies a voltage to each of the circuit blocks. Like the control circuit block 13, the power supply circuit block 15 is disposed at a substantially central portion of the chassis member 5 and is a connector to which an AC power cord (not shown) is attached. A commercial power supply voltage is supplied through a power input block 17 having 16.
[0023]
The flexible wiring board 18 connects the scan electrode of the display panel 1 and the electrode lead-out portion of the sustain electrode and the printed wiring board of the scan driver circuit block 10 and the sustain driver circuit block 11, and the flexible wiring board 19 is an address of the display panel 1. The electrode lead-out portion of the electrode and the printed wiring board of the address driver circuit block 12 are connected to each other and are arranged by being bent 180 degrees from the front side to the back side through the outer peripheral portion of the display panel 1.
[0024]
3 to 6 show the configuration of the control circuit block 13 and the input signal circuit block 14, which will be described in detail below.
[0025]
As shown in FIGS. 5 and 6, the circuit board 20 of the control circuit block 13 is mounted with a microcomputer, a driver IC, an electric circuit component, etc. that constitute the predetermined control circuit as described above. The control circuit block 13 is configured, and the circuit board 20 of the control circuit block 13 is fixed to the chassis member 5 with screws or the like so as to be substantially parallel to the display panel 1. A signal input connector 21 is disposed at the end of the circuit board 20, and a signal is input from the input signal circuit block 14 through the connector 21.
[0026]
As shown in FIGS. 3 and 4, the input signal circuit block 14 is disposed on the chassis member 5 so as to be substantially parallel to the display panel 1 and is provided so as to open to the outside from the back cover 3 of the housing. A case member 22 having a mounting opening 22a, and a signal that is detachably attached to the case member 22 from the mounting opening 22a and is detachably connected to the connector 21 of the control circuit block 13 by being attached to the case member 22. Board blocks 23 and 24 having output terminals 23a and 24a and input terminal portions 23b and 24b (terminals are omitted in the figure) to which connection cables for connecting to external devices are detachably connected. And have.
[0027]
In addition, another input signal block (not shown) having an input terminal to which a connection cable for connecting to another external device is detachably connected is built in the case member 22, and the control circuit block 13 is always connected.
[0028]
The case member 22 is formed by bending a metal plate, and an attachment piece 22b for attaching to the chassis member 5 with screws or the like is integrally provided on a surface on the chassis member 5 side at an arbitrary location. The mounting port 22a described above is provided on a surface that rises at a substantially right angle from the mounting surface to the chassis member 5. The case member 22 is attached to the chassis member 5 in a state where the mounting opening 22a is opened to the outside through an opening (not shown) provided in the back cover 3.
[0029]
Further, on the inner wall surface of the case member 22, a guide member 25 of a ridge extending in a direction orthogonal to the mounting opening 22a and formed by bending a metal plate is attached, and a board block is attached from the mounting opening 22a. When the board blocks 23 and 24 are mounted in the case member 22, the board blocks 23 and 24 are positioned while being guided to predetermined positions, and the connectors 21 a and 24 a of the board blocks 23 and 24 are connected to the connector 21 of the control circuit block 13. Is guided so that it can be inserted easily. A plurality of guide members 25 (three shown in the figure) are arranged on the inner wall surface of the case member 22 at regular intervals so as to correspond to the board block 23 of the minimum unit.
[0030]
Next, the board blocks 23 and 24 will be described. Each of the board blocks 23 and 24 includes circuit boards 26 and 27 on which components such as an IC and an electric circuit part constituting an input signal circuit are mounted, and the circuit board 26. 27, which also serves as a shield plate that electromagnetically shields the components constituting the input signal circuit attached to the upper surface of 27, and has a guide portion 28a formed by a recess that fits into the guide member 25 attached to the inner wall surface of the case member 22. A metal guide plate 28 and a shield plate 29 that electromagnetically shields the components constituting the input signal circuit attached to the lower surfaces of the circuit boards 26 and 27. The guide portion 28a of the guide plate 28 is provided by forming a recess by molding the guide plate 28.
[0031]
That is, the board block 23 has a minimum unit size, and the board block 23 is provided with one guide plate 28. The board block 24 has a size obtained by joining two board blocks 23. Two guide plates 28 are provided.
[0032]
The circuit boards 26 and 27 are arranged on the rear surface side by electrically connecting and fixing the terminals of the connectors 23a and 24a. The circuit boards 26 and 27 are arranged on the front side of the circuit boards 26 and 27. Input terminal portions 23b and 24b in which electrically connected input terminals are arranged are provided, and a U-shaped fitting 30 is attached to the input terminal portions 23b and 24b.
[0033]
Next, main circuit components in the plasma display device to which the present invention is applied will be described with reference to FIG.
[0034]
FIG. 7 is a diagram showing the circuit configuration of the power supply circuit block 15 and the input signal circuit block 14 in the plasma display device. In FIG. 7, 31 is an AC power cord, 32 is a filter unit, 33 is a relay, and 34 is AC. -DC converter, 35 is a standby power supply unit, 36 is a microcomputer for controlling the operation of the entire apparatus, 37 is a main power switch, and when the AC power cord 31 is connected to a commercial AC power source, the standby power supply unit 35 operates. And voltage V2 is output.
[0035]
Reference numeral 38 denotes a circuit board for signal processing mounted on the board blocks 23 and 24, and a memory unit 39 such as a ROM in which information data of a voltage supply signal is written is mounted. Reference numeral 40 denotes a board power supply for supplying a voltage to the circuit board 38. The board power supply 40 is provided in the power supply circuit block 15, and is configured to supply AC power by turning on and off the relay 41.
[0036]
Here, as described above, when the AC power cord 31 is connected to a commercial AC power supply, the standby power supply unit 35 starts operation and outputs the voltage V2. When the main power switch 37 is turned on, the voltage V2 is supplied to the microcomputer 36 and the standby state is established, and the relay 33 can be driven by the remote controller. A state in which the relay 33 is off is a general standby state. When the relay 33 is turned on by a signal from the microcomputer 36, when commercial AC power from the AC power cord 31 is supplied to the AC-DC converter 34, a drive voltage is applied to the display drive circuit block and the input signal circuit block. The supplied AC-DC converter 34 starts operation, and generates a voltage V1 necessary for driving the panel and a voltage V3 necessary for the circuit board 38.
[0037]
In the standby state in which the relay 33 is off, the AC-DC converter 34 stops operating, and thus the voltage V3 is not supplied to the circuit board 38. However, when the voltage supply signal information data for turning on the function standby board power supply unit 40 is written in the memory unit 39 provided in the circuit board 38, the microcomputer 36 determines the information data and turns on the relay 41 . When turned on, commercial AC power from the AC power cord 31 is supplied to the board power supply 40, and the board power supply 40 operates. The board power supply unit 40 supplies an output voltage V4 that is a standby voltage of the circuit board 38 to the circuit board 38 of the board block . This voltage is supplied regardless of the state of the relay 33.
[0038]
Since this state is different from the normal standby state, for example, the operating state of the board power supply unit 40 can be notified to the user by changing the lighting color of a display lamp such as an LED provided on the front surface of the set main body. FIG. 8 shows an example of the relationship between the state of the main power switch 37, the AC-DC converter 34, and the board power supply unit 40 and the lighting color of the LED.
[0039]
As is apparent from the above description, the board power supply unit 40 dedicated to the board is operated by controlling the microcomputer 36 of the main body based on the data from the circuit board 38 of the board blocks 23 and 24 exchangeable from the outside. Therefore, regardless of whether the power supply of the main body is on or off, the board power supply 40 dedicated to the circuit board can be automatically turned on by installing the board blocks 23 and 24 having the circuit board 38 that requires voltage supply. Therefore, it is possible to realize a device corresponding to a wide variety of function boards without increasing the power in the normal standby state.
[0040]
【The invention's effect】
As is apparent from the above description, according to the present invention, it is possible to provide an image display device having a signal input terminal structure corresponding to the purpose of use of the user only by replacing the board block of the input signal circuit block. In addition, the board power supply dedicated to the circuit board can be automatically turned on by installing a board block with a circuit board that requires voltage supply, regardless of whether the power supply of the main unit is on or off, and in a normal standby state Thus, it is possible to realize a device corresponding to a wide variety of function boards without increasing the power of the device.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view showing an internal arrangement structure of a plasma display apparatus according to an embodiment of the present invention. FIG. 2 is a plan view showing an internal arrangement structure of the plasma display apparatus. FIG. 4 is an exploded perspective view showing the configuration of the input signal circuit block portion of FIG. 5. FIG. 5 is a plan view showing the internal arrangement structure of the input signal circuit block. FIG. 7 is a block diagram showing a circuit configuration example of a power supply circuit block and an input signal circuit block in the plasma display device of the present invention. FIG. 8 is an explanatory diagram showing a lighting example of a display lamp in the device. Explanation of]
1 Panel 13 Control Circuit Block 14 Input Signal Circuit Block 15 Power Supply Circuit Blocks 23 and 24 Board Block 36 Microcomputer 38 Circuit Board 39 Memory Unit 40 Board Power Supply Unit

Claims (2)

A flat panel display panel, a display drive circuit block that applies a signal to the display panel for display, and an external device that outputs the image signal and is connected to the display drive circuit block and corresponds to the image signal. And an input signal circuit block having a replaceable board block, and a power supply circuit block for supplying a drive voltage to the display drive circuit block and the input signal circuit block. The power supply circuit block controls the operation of the entire apparatus. The microcomputer starts operation by connecting the AC power cord to a commercial AC power supply, and the main power switch is turned on to supply a voltage to the microcomputer to be in a standby state, and also to the board block. a standby power supply unit for supplying a voltage, prior to the signal from the microcomputer It said display driving circuit block and the AC-DC converter for supplying a driving voltage to the input signal circuit block and the AC power supply of the commercial from the AC power cord is supplied to the microcomputer from the board block of the input signal circuit block A flat panel image display apparatus comprising: a board power supply unit that is supplied with commercial AC power from the AC power cord and supplies standby voltage to the board block when a voltage supply signal is transmitted .   The board block includes a memory unit in which information data of a voltage supply signal for turning on the board power supply unit is written, and the microcomputer determines the information data of the voltage supply signal by attaching the board block to the input signal circuit block. 2. The flat panel display according to claim 1, wherein the board power supply is turned on.

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