JPH07264523A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To obtain a liquid crystal(LC) display device capable of corresponding to plural kinds of broadcasting systems and plural kinds of LC display parts. CONSTITUTION:The LC display device 1 is provided with an LC display unit 2 and plural sub-units such as a tuner unit 3a to be attachably/detachably loaded to the unit 2 and the tuner unit 3a is provided with a receiving circuit 60 for receiving a prescribed TV wave, an LC driving interface circuit 70 and selecting circuits 74, 75. The circuit 70 is provided with vertical/horizontal direction control circuits 71 to 73 corresponding to three kinds of LC display parts 40 and respectively generating display control signals corresponding to three kinds of broadcasting systems. A display control signal corresponding to an LC sort signal MS inputted from a control part 42 in the unit 2 out of plural display control signals generated by the circuits 71 to 73 based upon a broadcasting discriminating signals BS inputted from a control circuit 65 is selected by the circuits 74, 75 and outputted to the unit 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device.

[0002]

2. Description of the Related Art Conventionally, a liquid crystal display device is manufactured, for example, as a part of a liquid crystal television device, that is, as an image display portion of the television device, and its function is a single television function.

Further, in a liquid crystal television device, the liquid crystal display device is required to properly display a television image.
The driving method and screen size are designed and manufactured exclusively for the liquid crystal television device.

That is, the liquid crystal television set includes a receiving circuit,
It is composed of liquid crystal drive interface circuit, liquid crystal unit, etc., and the receiving circuit is rod antenna, television linear circuit, frequency detection circuit, tuner tuning voltage control circuit, A
It is composed of a / D conversion circuit, a control circuit, and the like. The liquid crystal drive interface circuit includes a scan side drive circuit, a data side drive circuit, a liquid crystal display panel, and the like.

In the conventional liquid crystal television device, the rod antenna and the liquid crystal display panel are integrally structured, and a drive signal corresponding to a specific liquid crystal display panel manufactured integrally is generated. In addition to displaying, a television signal of a specific single broadcasting system is received and displayed on a liquid crystal display panel.

[0006]

However, such a conventional liquid crystal display device is manufactured as a part of a liquid crystal television device or the like, and in particular, in the liquid crystal television device, the liquid crystal display is performed from the rod antenna. Since the panel was manufactured integrally, it only supports TV radio waves of a specific broadcasting system, and also supports only a specific liquid crystal display panel, and supports different broadcasting systems or different liquid crystal display panels. In order to comply with the above, it is necessary to re-manufacture all the component parts, which requires duplicate manufacturing work, which increases the manufacturing cost of liquid crystal display devices such as liquid crystal television devices and the use of liquid crystal display devices. There was a problem of poor sex.

Therefore, the present invention has been made in view of the above problems, and by incorporating a plurality of types of broadcasting systems, a plurality of types of liquid crystal display units, and a drive control unit corresponding to the liquid crystal display unit into a plurality of types, The purpose of the present invention is to reduce the manufacturing cost of the liquid crystal display device and to improve the usability of the liquid crystal display device by omitting duplicated manufacturing work when manufacturing the liquid crystal display device corresponding to the liquid crystal display unit or the liquid crystal display unit. . In addition, the liquid crystal display device is compatible with a plurality of types of broadcasting systems, and a subunit including a drive control unit that drives a plurality of types of liquid crystals, and an arbitrary liquid crystal display unit to which these subunits can be detachably mounted. ,
It is an object of the present invention to provide a liquid crystal display device having a wide range of use by being constituted by.

[0008]

According to another aspect of the present invention, there is provided a liquid crystal display device, wherein a liquid crystal display unit selected from a plurality of types and a reception unit receiving a television radio wave of a broadcasting system selected from a plurality of types. And a display drive signal corresponding to a plurality of types of liquid crystal display units including at least the type of the liquid crystal display unit, and a drive method based on a driving method corresponding to a plurality of types of broadcast systems including a broadcast system received by the receiving unit. A plurality of types of drive control units to be generated, and a drive control unit corresponding to a predetermined liquid crystal display unit and a predetermined broadcasting system is selected from the plurality of types of drive control units, and the selected drive control unit is selected. Selecting means for providing the display drive signal generated by the above to the liquid crystal display section, thereby achieving the above object.

In this case, for example, as described in claim 2, the liquid crystal display section includes a liquid crystal type generation means for notifying the drive control section of its own type, and the selection means is
The drive control unit corresponding to the type of the mounted liquid crystal display unit may be selected from the plurality of types of drive control units based on the notification from the liquid crystal type generation unit.

Further, for example, as described in claim 3, the receiving unit includes a broadcast type notifying unit for notifying the drive control unit of the type of the broadcast system that the receiving unit receives, and the selecting unit is the The drive control unit corresponding to the type of the broadcast system received by the receiving unit may be selected from the drive control units of the plurality of types of broadcast systems based on the notification from the broadcast type notifying unit.

A liquid crystal display device according to a fourth aspect of the present invention is a liquid crystal display device including a liquid crystal display unit and a plurality of types of sub-units detachably attached to the liquid crystal display unit and supplying at least display data. Then, the liquid crystal display unit discriminates an arbitrary type of liquid crystal display panel, a drive circuit for driving the liquid crystal display panel, and a type of the mounted sub-unit, and corresponds to the type of the sub-unit. And a control unit that controls driving of the liquid crystal display panel via the drive circuit. At least one of the sub-units is a tuner unit that receives TV radio waves, and the tuner unit is a tuner unit of an arbitrary broadcasting system. A receiver for receiving television radio waves and outputting the video data to the liquid crystal display unit as display data; And a plurality of types of liquid crystal display panels, and a plurality of types of drive control units that generate display drive signals based on drive methods corresponding to a plurality of types of broadcasting systems including the broadcasting system received by the receiving unit. And selecting a drive control unit corresponding to the mounted predetermined liquid crystal display panel from among the plurality of types of drive control units and corresponding to a predetermined broadcasting system received by the reception unit, and selecting the selected drive control unit. The above-described object is achieved by including a selection unit that provides the display drive signal generated by the control unit to the liquid crystal display unit.

[0012]

According to the liquid crystal display device of the first aspect, the receiving unit receives television radio waves of an arbitrary broadcasting system among a plurality of types, and the drive control unit corresponds to the plurality of types of liquid crystal display units. A display drive signal is generated based on a drive method corresponding to a plurality of types of broadcast systems, including the broadcast system received by the reception unit, and the display drive signal is used to support an arbitrary type of liquid crystal display unit and a predetermined broadcast system. Since the liquid crystal display is driven by selecting the display drive signal corresponding to, the drive control unit is compatible with multiple types of TV radio waves without having to manufacture the drive control unit according to the broadcast system and the type of liquid crystal display. In addition, it is possible to easily and inexpensively manufacture a liquid crystal display device capable of driving a plurality of types of liquid crystal display parts without performing redundant manufacturing steps.

Further, in this case, as described in claim 2, the liquid crystal display unit notifies the drive control unit of its own type,
When the display drive signal corresponding to the type of the mounted liquid crystal display unit is selected from the plurality of types of drive control units based on the notification, the display drive signal corresponding to the type of the liquid crystal display unit is automatically generated. The liquid crystal display unit can be selected and driven, and convenience in using the liquid crystal display device can be improved.

Further, in this case, as described in claim 3, the receiving unit notifies the drive control unit of the type of the broadcast system received by the receiving unit, and based on the notification, the drive control of a plurality of types of broadcast systems. By selecting the drive control unit corresponding to the type of broadcasting system received by the receiving unit from the unit, it is possible to automatically select the display drive signal corresponding to the type of broadcasting system and drive the liquid crystal display unit. Therefore, the convenience of using the liquid crystal display device can be further improved.

According to the liquid crystal display device of the fourth aspect of the present invention, a plurality of types of sub-units can be detachably attached to the liquid crystal display unit, and the liquid crystal display unit discriminates the type of the attached sub-unit. In addition to driving and controlling the liquid crystal display unit according to the type of the sub-unit, one of the sub-units is a tuner unit that receives TV radio waves of an arbitrary broadcasting system, and is compatible with the broadcasting system. , A drive control section corresponding to a plurality of types of liquid crystal display units is selected, and a display drive signal generated by the drive control section is output to the liquid crystal display unit.
Various types of sub-units can be attached to multiple types of liquid crystal display units, and the display drive suitable for the attached sub-units can be automatically performed. It is possible to drive the liquid crystal display unit by selecting the display drive signal corresponding to the liquid crystal display unit, and it is possible to support a plurality of broadcasting systems without having to manufacture a different liquid crystal drive circuit for each liquid crystal display unit. The liquid crystal display device corresponding to the liquid crystal display unit can be manufactured easily and inexpensively, and the liquid crystal display unit can be effectively used.

[0016]

Embodiments Embodiments will be described below with reference to the drawings.

<First Embodiment> FIGS. 1 to 3 are views showing a first embodiment of a liquid crystal display device of the present invention.

First, the structure will be described.

FIG. 1 is an overall configuration diagram of the liquid crystal display device 1. The liquid crystal display device 1 includes a liquid crystal display unit 2 and a tuner unit 3a, which is a sub-unit 3 detachably attached to the liquid crystal display unit 2. And game unit 3b
And so on.

The liquid crystal display unit 2 has its body case 1
The liquid crystal display panel 11 is attached to the surface of 0,
On the lower surface of the liquid crystal display panel 11 on the surface of the main body case 10, a frequency display 1 showing the TV frequencies of VHF and UHF.
2 is displayed by printing or the like. Also, the main body case 1
A switch 13 for turning on / off the main power source of the liquid crystal display unit 2 is provided on the side surface of 0. Further, although not shown, a connector for connecting a controller (so-called joypad) for operating a game when the game unit 3b is connected to the side surface of the main body case 10, the tuner unit 3a and the game unit 3b.
A connector for connecting the subunits 3 such as the above is provided.

The tuner unit 3a has a band switching key 21 for switching the frequency band between VHF and UHF, a channel call key 22 for turning on / off the display of the broadcast channel, and a down channel for the selected channel on the surface of the body case 20. Channel down key (DOWN)
23 and a channel up key (UP) 24 for increasing the selected channel are provided, and the main body case 20
A slide type rod antenna 25 is attached to the upper side surface of the. Further, a terminal portion 26 is attached to the lower side surface of the main body case 20, and the terminal portion 26 is attached.
Is detachably inserted into a connector (not shown) formed on the upper side surface of the liquid crystal display unit 2.

In the game unit 3b, a terminal portion 31 is attached to a lower side surface of a main body case 30, and the terminal portion 31 is formed on an upper side surface of the liquid crystal display unit 2 so as to cover the tuner unit 3a. The terminal portion 26 is removably inserted into the same connector into which the terminal portion 26 is inserted.

That is, in the liquid crystal display unit 2, the terminal portion 26 of the tuner unit 3a which is the subunit 3 is formed.
By inserting the terminal portion 31 of the game unit 3b into the connector of the liquid crystal display unit 2, one of the tuner unit 3a or the game unit 3b can be selectively mounted,
The liquid crystal display unit 2 displays an image from the mounted subunit 3 on the panel 11, as described later.

The structure of each unit will be sequentially described below.

As shown in FIG. 2, the liquid crystal display unit 2 includes a liquid crystal display section 40, a storage section 41, a control section 42, a power supply section 43, and the like. The liquid crystal display section 40 includes the liquid crystal display panel 11 and the liquid crystal display. Drive circuit 44 and liquid crystal type signal generator 4
It has 5 etc.

In FIG. 2, the operation unit 46 includes a power switch 13 of the liquid crystal display unit 2, a band switching key 21, a channel call key 22, a channel down key 23 and a channel up key 24 of the tuner unit 3a, and a liquid crystal display. The various keys of the controller connected to the unit 2 and other switches and keys of the subunit 3 connected to the liquid crystal display unit 2 are collectively referred to.

The liquid crystal display panel 11 has a plurality of scanning lines and data lines arranged in a matrix, and display elements such as liquid crystal capacitors are arranged at the intersections of the scanning lines and the data lines.

The liquid crystal drive circuit 44 includes a scan side drive circuit (see FIG. 3) 50 and a data side drive circuit (see FIG. 3) 51.
The scanning side driving circuit 50 and the data side driving circuit 51 are provided with the liquid crystal display panel 11 from the control section 42.
Various display control signals and display data necessary for driving the liquid crystal display panel 11 are input, and various power supplies required for driving the liquid crystal display panel 11 are supplied from the power supply unit 43.

That is, the scanning side driving circuit 50 is based on the display control signal input from the control unit 42 and the power supply unit 43.
A scan driving voltage is generated from a power source supplied from the power source and is supplied to the liquid crystal display panel 11 to scan the scan line of the liquid crystal display panel 11. The data side drive circuit 51 includes a control unit 42.
Liquid crystal display panel 1 based on display data supplied from
A signal voltage is supplied to 1 to drive the liquid crystal display panel 11.

The liquid crystal type signal generator 45 outputs the liquid crystal type signal MS corresponding to the type of the liquid crystal display unit 40 to the control unit 42.
Output to.

That is, the liquid crystal display section 40 is not limited to one type of the liquid crystal display panel 11 and the liquid crystal drive circuit 44, and various liquid crystal display panels 11 and the liquid crystal drive circuit 44 can be attached. For example, the liquid crystal display panel 11 is not limited to the number of scanning lines or data lines, and may have 220 scanning lines, 146 scanning lines, or any other number. As the liquid crystal drive circuit 44, one that sequentially drives one scan line, one that simultaneously drives two scan lines at the same time, one that sequentially drives three scan lines at the same time, and various other drives It may be a method. Then, the liquid crystal type signal generation unit 45 outputs the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 to the control unit 42.

The control section 42 discriminates the type of the liquid crystal display section 40 based on the liquid crystal type signal MS from the liquid crystal type signal generating section 45 of the liquid crystal display section 40, and a control signal suitable for the type of the liquid crystal display section 44. Is output to the liquid crystal drive circuit 44, and a liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 is output to the power source unit 43, so that the power source unit 43 drives the liquid crystal display unit 40 appropriately as described below. Turn on the power.

Further, the control section 42, as will be described later, receives the liquid crystal type signal MS input from the liquid crystal type signal generating section 45.
Is output to the subunit 3.

Further, the control section 42 discriminates whether the sub-unit 3 is mounted or not mounted, determines whether the mounted sub-unit 3 is the tuner unit 3a or the game unit 3b, or the other sub-unit 3 Then, the operation control appropriate for the type of the mounted subunit 3 is performed. Whether the sub-unit 3 is mounted or not mounted may be determined by a switch that is turned on / off in accordance with the mounting / non-mounting of the sub-unit 3.
The determination may be made by exchanging signals with the sub-unit 3, and the determination method is not limited. Also, the installed subunit 3 is the tuner unit 3
The determination as to whether it is a, the game unit 3b, or the other subunit 3 may be a switch that is turned on / off depending on the type of the attached subunit 3, or the subunit 3 Signal between and
For example, the determination may be made by exchanging 2-bit signals,
The determination method is not limited.

The storage unit 41 is, for example, a ROM (Read Onl
y memory), RAM (Random Access Memory), etc., and stores a control program for controlling the drive of the liquid crystal display unit 2, system data, and the like, and is also used as a work memory for the control unit 42.

That is, the storage unit 41 includes the liquid crystal display unit 40.
Of the drive control method stored in the storage unit 41, the control unit 42 stores the liquid crystal type signal MS input from the liquid crystal type signal generation unit 45 among the drive control methods stored in the storage unit 41. The display control signal corresponding to the type of the liquid crystal type signal generating unit 45 is output to the liquid crystal drive circuit 44 based on the driving method corresponding to the liquid crystal type signal generating unit 45, and the power source unit 43 is notified of the type of the liquid crystal type signal generating unit 45. Driving power corresponding to the type of the signal generator 45 is supplied to the liquid crystal display unit 40.

Further, the storage unit 41 includes the liquid crystal display unit 2
The driving method of the liquid crystal display section 40 corresponding to the type of the mounted subunit 3 is stored in the storage unit 41.
The drive of the liquid crystal display unit 40 is controlled based on the drive method stored in the.

In particular, the storage unit 41 stores the game unit 3b.
Stores the control method of the game software when it is mounted on the liquid crystal display unit 2 and the driving method of the liquid crystal display unit 40 at that time. The control unit 42 mounts the game unit 3b on the liquid crystal display unit 2. Then, the game software data is read from the game unit 3b based on the control method of the game software stored in the storage unit 41, and the operation unit 46, particularly, the operation of the controller connected to the liquid crystal display unit 2 is handled. While performing the game process, the video data read from the game software is converted into display data and displayed on the liquid crystal display panel 11 based on the driving method of the liquid crystal display unit 40 at that time.

The power source section 43 generates various kinds of power sources necessary for the operation of the liquid crystal display unit 2 from a power source supplied from a battery or an external commercial power source and supplies them to each section of the liquid crystal display unit 2. In particular, although not specifically shown, the power supply unit 43 includes a power supply adjustment circuit that generates a required number of power supplies depending on the type of the liquid crystal display unit 40, and selects a power supply corresponding to the type of the liquid crystal display unit 40. A selection circuit for supplying the liquid crystal display unit 40 to the liquid crystal display unit 40 is provided, and based on a liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 input from the control unit 42,
Driving power corresponding to the type of the liquid crystal display unit 40 is supplied to the liquid crystal display unit 40.

Next, the structure of the subunit 3 will be described.

First, the structure of the tuner unit 3a will be described.

The tuner unit 3a is, as shown in FIG. 3, a receiving circuit 6 for receiving television radio waves and linearly processing them.
0 and a liquid crystal drive interface circuit (drive control section) 70 for driving the liquid crystal display unit 2.

The receiving circuit 60 includes a rod antenna 25, an electronic tuning tuner 61, a television linear circuit 62, and an A / D.
A conversion circuit 63, a data conversion circuit 64, a control circuit 65 and the like are provided.

The rod antenna 25 receives television radio waves and supplies the received radio waves to the electronic tuning tuner 61.

The electronic tuning tuner 61 includes a control circuit 65.
A designated channel is selected in accordance with a tuning signal input from, the desired television broadcast radio wave supplied from the rod antenna 25 is converted into an intermediate frequency signal, and the intermediate frequency signal is output to the television linear circuit 62.

The television linear circuit 62 is composed of an intermediate frequency amplification circuit, a video detection circuit, a video amplification circuit, an AFT detection circuit, a chroma circuit, etc., and converts the intermediate frequency signal input from the electronic tuning tuner 61 into the intermediate frequency signal. After amplification by the amplification circuit, AFT detection by the AFT detection circuit, image detection by the video detection circuit to extract the image signal, and further after the image signal output by the video detection circuit is amplified by the video amplification circuit , A / D conversion circuit 6
Output to 3. Further, the television linear circuit 62, with its chroma circuit, extracts a synchronization signal from the video signal and outputs it to the control circuit 65.

The audio signal separated by the television linear circuit 62 is sent to an audio circuit (not shown), and is audio-detected by the audio circuit to be converted into a low frequency signal, which is then output to the liquid crystal display unit 2. It The liquid crystal display unit 2 includes an amplifier circuit and a speaker (not shown), and outputs the audio signal input from the tuner unit 3a in a loud voice from the speaker.

The A / D conversion circuit 63 performs A / D (analog / digital) conversion (sampling) on the video signal input from the television linear circuit 62 based on the timing signal input from the control circuit 65, and data conversion. Output to the circuit 64.

The data conversion circuit 64 is the A / D conversion circuit 6
The digital video signal input from the circuit 3 is converted into a data format that can be driven by the data side drive circuit 51 of the liquid crystal display unit 2, and then output to the control unit 42 as display data.

That is, the data conversion circuit 64 sequentially reads, for example, the video signal input from the A / D conversion circuit 63 according to the timing signal input from the control circuit 65, and after reading the video signal for one line, A gradation signal is created according to the video signal and is output to the liquid crystal display unit 2 as display data.

When the tuner unit 3a is mounted on the liquid crystal display unit 2, the controller 42
Outputs the video signal (display data) from the tuner unit 3a and a display control signal described later to the scanning side driving circuit 50 and the data side driving circuit 51 of the liquid crystal display unit 40 as they are (through state).

In FIG. 3, for the sake of clarity, it is described that the display data is input from the data conversion circuit 64 of the tuner unit 3a to the data side drive circuit 51 of the liquid crystal display unit 40 of the liquid crystal display unit 2. There is.

The control circuit 65 separates the horizontal synchronizing signal φH and the vertical synchronizing signal φV contained in the video signal input from the television linear circuit 62, and outputs them to the liquid crystal drive interface circuit 70.

The liquid crystal drive interface circuit 70
Drive the liquid crystal display units 40 of different types.
A set of vertical / horizontal direction control circuits 71, 72, 73 and two selection circuits 74, 75 are provided, and the vertical / horizontal direction control circuits 71, 72, 73 each have a different broadcasting system, in the present embodiment. , NTSC (National TelevisionS
ystem Commitee) method, PAL (Phase alternation b)
y line) method and SECAM (Sequential color and
NTSC / P with built-in vertical direction control circuit and horizontal direction control circuit compatible with 3 types of broadcasting
Vertical control circuit 71a for AL / SECAM and NTSC
/ PAL / SECAM horizontal direction control circuit 71b, NT
Vertical control circuit 72a for SC / PAL / SECAM and horizontal control circuit 72 for NTSC / PAL / SECAM
b and an NTSC / PAL / SECAM vertical direction control circuit 73a and an NTSC / PAL / SECAM horizontal direction control circuit 73b.

NTSC / PAL / SECAM vertical direction control circuit 71a, NTSC / PAL / SECAM vertical direction control circuit 72a and NTSC / PAL / SECAM.
The vertical control circuit 73a for
It has a built-in vertical direction control circuit compatible with the three PAL and SECAM broadcasting systems.
/ PAL / SECAM horizontal direction control circuit 71b, NT
SC / PAL / SECAM horizontal direction control circuit 72b and NTSC / PAL / SECAM horizontal direction control circuit 7
3b has a built-in horizontal direction control circuit corresponding to each of the above three broadcasting systems.

Then, the vertical control circuit 71a for NTSC / PAL / SECAM, NTSC / PAL / SECA
Horizontal control circuit 71b for M, NTSC / PAL / SE
Vertical control circuit 72a for CAM, NTSC / PAL /
Horizontal direction control circuit 72b for SECAM, NTSC / PA
Vertical control circuit 73a for L / SECAM and NTSC
The horizontal control circuit 73b for / PAL / SECAM includes
From the control circuit 65 of the receiving circuit 60, the broadcast type signal BS indicating the receiving broadcast system of the receiving circuit 60 is input. The broadcast type signal BS is the same as in the case of the first embodiment.

Further, the vertical direction control circuit 71a for each NTSC / PAL / SECAM, NTSC / PAL / SECA
Vertical control circuit 72a for M and NTSC / PAL / S
The vertical synchronizing signal φV is inputted to the vertical direction control circuit 73a for ECAM from the control circuit 65 of the receiving circuit,
The horizontal synchronizing signal φH of the receiving circuit 60 is supplied to the NTSC / PAL / SECAM horizontal direction control circuit 71b, the NTSC / PAL / SECAM horizontal direction control circuit 72b, and the NTSC / PAL / SECAM horizontal direction control circuit 73b. It is input from the control circuit 65.

The NTSC / PAL / SECAM vertical direction control circuit 71a and the NTSC / PAL / SECAM horizontal direction control circuit 71b correspond to the broadcasting system designated by the broadcasting type signal BS when the broadcasting type signal BS is input. The vertical direction control circuit and the horizontal direction control circuit are operated to drive the liquid crystal display unit 40 of a predetermined type based on the vertical synchronization signal φV and the horizontal synchronization signal φH for the broadcasting system input from the control circuit 65. A vertical display control signal and a horizontal display control signal, such as a start pulse and a shift clock, which are suitable for the vertical display control signal and the horizontal display control signal to the selection circuit 74 and the selection circuit 75, respectively. Output.

Similarly, the above NTSC / PAL / SECA
Vertical control circuit 72a for M and NTSC / PAL / S
When the broadcast type signal BS is input from the control circuit 65, the ECAM horizontal direction control circuit 72b receives the broadcast type signal BS.
By operating the vertical direction control circuit and the horizontal direction control circuit of the broadcasting system specified by, the vertical synchronization signal φV and the horizontal synchronization signal φH for the broadcasting system input from the control circuit 65 are input.
A vertical display control signal and horizontal direction suitable for driving a liquid crystal display unit 40 of a different type from the NTSC / PAL / SECAM vertical direction control circuit 71a and the NTSC / PAL / SECAM horizontal direction control circuit 71b based on A display control signal is generated to select the selection circuit 74 and the selection circuit 7.
Output to 5.

Similarly, the above NTSC / PAL / S
Vertical control circuit 73a for ECAM and NTSC / PA
When the broadcast type signal BS is input from the control circuit 65, the L / SECAM horizontal direction control circuit 73b operates and controls the vertical direction control circuit and the horizontal direction control circuit of the broadcasting system designated by the broadcast type signal BS. A vertical direction control circuit 71a for NTSC / PAL / SECAM and a horizontal direction control circuit 71b for NTSC / PAL / SECAM and NTSC / PAL based on the vertical synchronization signal φV and the horizontal synchronization signal φH for the broadcasting system input from the circuit 65. / SECA
Vertical control circuit 72a for M and NTSC / PAL / S
A vertical display control signal and a horizontal display control signal suitable for driving the liquid crystal display unit 40 of a type different from that of the ECAM horizontal control circuit 72b are generated, and the selection circuit 74 is generated.
And output to the selection circuit 75.

That is, the vertical / horizontal direction control circuit 71,
The vertical / horizontal direction control circuit 72 and the vertical / horizontal direction control circuit 73 operate the vertical direction control circuit and the horizontal direction control circuit corresponding to the broadcast type signal BS input from the control circuit 65, respectively, and liquid crystal of different types respectively. Display unit 4
A vertical display control signal and a horizontal display control signal suitable for driving 0 are generated, the generated vertical display control signal is input to the selection circuit 74, and the horizontal display control signal is selected.
Output to 5.

The selection circuit 74 and the selection circuit 75 are formed by, for example, a multiplexer, and each vertical / horizontal direction control circuit is based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2. 71, 72,
One of the vertical display control signal and the horizontal display control signal input from 73 is selectively selected and output to the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 is input to the selection circuit 75 from the control unit 42 of the liquid crystal display unit 2, and the selection circuit 75 is based on the liquid crystal type signal MS. , NTSC / PAL / S
Horizontal control circuit 71b for ECAM, NTSC / PAL
/ SECAM horizontal direction control circuit 72b and NTSC /
Of the horizontal display control signals input from the horizontal control circuit 73b for PAL / SECAM, the liquid crystal type signal MS
One of the horizontal display control signals corresponding to the type of the liquid crystal display unit 40 designated by is selected and output to the control unit 42 of the liquid crystal display unit 2.

Further, the selection circuit 75 outputs the liquid crystal type signal MS inputted from the control section 42 to the selection circuit 74 as it is.

The selection circuit 74, based on the liquid crystal type signal MS input through the selection circuit 75, selects NTSC / PA.
Vertical control circuit 71a for L / SECAM, NTSC /
Vertical control circuit 72a and NT for PAL / SECAM
Among the vertical display control signals input from the SC / PAL / SECAM vertical direction control circuit 73a, one of the vertical display control signals corresponding to the type of the liquid crystal display unit 40 designated by the liquid crystal type signal MS is selected. To the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 70, based on the vertical synchronizing signal φV and the horizontal synchronizing signal φH input from the control circuit 65 of the receiving circuit 60, operates in the vertical direction corresponding to the type of the broadcasting system of the receiving circuit 60. The control circuit and the horizontal direction control circuit are operated to generate a vertical direction display control signal and a horizontal direction display control signal corresponding to the three types of liquid crystal display units 40, and the selection circuit 74 and the selection circuit 75
And the liquid crystal type signal MS from the liquid crystal display unit 2
The display control signal corresponding to the type of the liquid crystal display unit 40 is selected by the selection circuits 74 and 75 based on the above, and is output to the control unit 42 of the liquid crystal display unit 2.

When the tuner unit 3c is attached to the liquid crystal display unit 2, the control section 42 receives the display control signal input from the liquid crystal drive interface circuit 70 of the tuner unit 3c as it is, and the scan side drive circuit 50 and the data side drive circuit. Output to 51.

In FIG. 3, for the sake of clarity, the display control signal is output from the selection circuit 74 and the selection circuit 75 of the liquid crystal drive interface circuit 70 directly to the scanning side drive circuit 50 and the data side drive circuit 51. Have been described.

Next, the structure of the game unit 3b will be described.

Although not shown in detail, the game unit 3b has, in the main body case 30, a memory for storing programs of various games, video data and sound effect data of the games, and a control section for controlling the operation of the memory. And the interface and the like, and the game program execution process is performed by the control unit 42 of the liquid crystal display unit 2 as described above.
Do.

Next, the operation of this embodiment will be described.

In the liquid crystal display device 1, various sub-units 3 can be selectively attached to the liquid crystal display unit 2 in a removable manner, and the liquid crystal display unit 2 automatically recognizes the type of the attached sub-unit 3. Then, the liquid crystal display panel 11 is driven according to the mounted subunit 3.

Further, the liquid crystal display section 4 of the liquid crystal display unit 2
The number 0 is not limited to one type as described above, and various types (specifications) of the liquid crystal display unit 4 can be attached, and the liquid crystal display unit 2 is suitable for the type of the liquid crystal display unit 40. Drive.

Further, the receiving circuit 60 of the tuner unit 3a receives a predetermined one television broadcasting radio wave and outputs the video data to the liquid crystal display unit 2, and the liquid crystal drive interface circuit 70 of the tuner unit 3a A display control signal corresponding to the broadcasting system received by the receiving circuit 60 is generated and output to the liquid crystal display unit 2.

That is, the liquid crystal display section 40 is provided with a liquid crystal type signal generating section 45, and the liquid crystal type signal generating section 45 is provided.
Outputs a liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 to the control unit 42 of the liquid crystal display unit 2.

The control section 42 carries out drive control suitable for the type of the liquid crystal display section 40 indicated by the liquid crystal type signal MS.

The liquid crystal display unit 2 has a connector (not shown) to which the subunit 3 is attached,
Each sub-unit 3 is, for example, as shown for the tuner unit 3a and the game unit 3b in FIG. 1, a terminal portion 2 for mounting on the liquid crystal display unit 2, respectively.
6 and 31 are provided.

Each sub-unit 3 has terminal portions 26, 3
1 is inserted into the connector of the liquid crystal display unit 2 to be attached to the liquid crystal display unit 2, and the control unit 42 of the liquid crystal display unit 2 switches between the sub unit 3 and the switch operation when the sub unit 3 is attached. By exchanging signals, it is determined which sub-unit 3 the mounted sub-unit 3 is, for example, the tuner unit 3a or the game unit 3b.

When the type of the mounted subunit 3 is discriminated, the control unit 42 controls the driving of the liquid crystal display unit 40 according to the type of the subunit 3. When the game unit 3b is attached as the subunit 3, a controller for operating the game is connected to the connector.

That is, the liquid crystal display unit 2 has its control section 42 when the game unit 3b is mounted.
Reads the driving method of the game software and the driving method of the liquid crystal display section 40 corresponding to the game software stored in the storage section 41, reads the data of the game software from the game unit 3b, and reads the data of the game (operation section 46). The game progress process corresponding to the operation is performed, the video data read from the game unit 3b is converted into display data, and the liquid crystal display unit 40 suitable for the driving method corresponding to the type of the liquid crystal display unit 40 is driven, Also, the sound effect is output from the built-in speaker.

Further, in the liquid crystal display unit 2, as shown in FIG. 3, when the tuner unit 3a is mounted, the control section 42 of the liquid crystal display unit 2 directly receives the display data and the display control signal input from the tuner unit 3a (through the display unit). The output is provided to the scanning side drive circuit 50 and the data side drive circuit 51 of the liquid crystal display section 40. Further, as described above, the liquid crystal type signal MS from the liquid crystal type signal generation unit 45 of the liquid crystal display unit 40 is input to the control unit 42, and the control unit 42
The liquid crystal type signal MS is output to the selection circuit 74 of the tuner unit 3a.

The tuner unit 3a selects the TV broadcast wave of the designated channel from the TV broadcast wave received by the rod antenna 25 with the electronic tuning tuner 61,
The signal is converted into an intermediate frequency signal and output to the television linear circuit 62. The television linear circuit 62 is an electronic tuning tuner 61.
After amplifying the intermediate frequency signal input from, the AFT detection or the video detection is performed, the image signal is extracted, amplified, and then output to the A / D conversion circuit 63. In addition, the television linear circuit 62 extracts the synchronization signal from the video signal,
Output to the control circuit 65.

The A / D conversion circuit 63 performs A / D conversion by sampling the video signal input from the television linear circuit 62 based on the timing signal input from the control circuit 65, and outputs it to the data conversion circuit 64. The data conversion circuit 64 converts the video signal input from the A / D conversion circuit 63 into a data format that can be driven by the liquid crystal display unit 40 of the liquid crystal display unit 2, and then outputs the display data of the liquid crystal display unit 2 as display data. Output to the control unit 42.

Further, the control circuit 65 separates the vertical synchronizing signal φV and the horizontal synchronizing signal φH from the synchronizing signal inputted from the television linear circuit 62, and the three sets of vertical / horizontal direction controlling circuits 71 of the liquid crystal drive interface circuit 70 are separated. , 72, 7
Output to 3.

The vertical / horizontal direction control circuit 71, the vertical / horizontal direction control circuit 72 and the vertical / horizontal direction control circuit 73 respectively correspond to the broadcast type signal BS input from the control circuit 65. , 72a,
73a and horizontal direction control circuits 71b, 72b, 73b are operated to generate vertical direction display control signals and horizontal direction display control signals suitable for driving different types of liquid crystal display sections 40, and the generated vertical direction display control The signal is output to the selection circuit 74 and the horizontal display control signal is output to the selection circuit 75.

The selection circuit 74 and the selection circuit 75, based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2, each of the vertical / horizontal direction control circuits 7 described above.
1. Control of the liquid crystal display unit 2 by selectively selecting one of the vertical display control signal and the horizontal display control signal input from the vertical / horizontal direction control circuit 72 and the vertical / horizontal direction control circuit 73. It is output to the unit 42.

That is, the liquid crystal drive interface circuit 70, based on the synchronizing signal input from the control circuit 65 of the receiving circuit 60, has a vertical direction control circuit and a horizontal direction control circuit corresponding to the type of the broadcasting system of the receiving circuit 60. Are operated to generate vertical display control signals and horizontal display control signals corresponding to the three types of liquid crystal display units 40, and output them to the selection circuits 74 and 75. Then, based on the liquid crystal type signal MS from the liquid crystal display unit 2, the selection circuits 74 and 75 select a display control signal corresponding to the type of the liquid crystal display unit 40 and output it to the control unit 42 of the liquid crystal display unit 2.

Then, the control section 42 of the liquid crystal display unit 2
When it is determined that the tuner unit 3a is attached to the liquid crystal display unit 2, the video signal (display data) and the display control signal from the tuner unit 3a are unchanged (in the through state) on the scanning side of the liquid crystal display unit 40. It outputs to the drive circuit 50 and the data side drive circuit 51.

The scanning side drive circuit 50 and the data side drive circuit 51 drive the liquid crystal display panel 11 for display based on the display data and the display control signal input via the control section 42.

Therefore, the liquid crystal display device 1 is provided with a liquid crystal display unit 2 and a plurality of sub-units 3 which are detachably attached to the liquid crystal display unit 2 and which supply at least display data. The control unit 42 determines the type of the mounted subunit 3, and the liquid crystal display panel via the scanning side drive circuit 50 and the data side drive circuit 51 of the liquid crystal display unit 40 corresponding to the type of the subunit 3. 11 is driven and controlled. As a result, various sub-units 3 can be attached to the liquid crystal display unit 2, and display drive suitable for the attached sub-units 3 can be automatically performed, and the liquid crystal display unit 2 can be effectively used to perform liquid crystal display. The usability of the unit 2 can be improved.

Further, according to this embodiment, the tuner unit 3a is used as the receiving circuit 6 corresponding to an arbitrary broadcasting system.
0 is manufactured to accommodate a plurality of types of broadcasting systems, and a liquid crystal drive interface circuit 81 corresponding to a plurality of types of liquid crystal display units 40 is incorporated, so that any liquid crystal display unit 40 is incorporated into the liquid crystal display unit 2. In addition, the tuner unit 3a compatible with a plurality of types of broadcasting systems can be manufactured, and the plurality of types of liquid crystal display units 40 and the tuner unit 3a compatible with a plurality of types of broadcasting systems can be manufactured at low cost. As a result, it is possible to improve the usability of the tuner unit 3a.

Further, in this embodiment, as one of the subunits 3, a game unit 3b for storing a game program (game software) and display data of the game is provided, and the control unit 42 of the liquid crystal display unit 2 is When the game unit 3b is attached as the subunit 3, the scanning side drive circuit 50 and the data side drive circuit 51 of the liquid crystal display unit 40 are driven based on the game software of the game unit 3b to display the display data of the game. Liquid crystal display panel 1
It is displayed in 1.

As a result, the game data can be easily displayed on the liquid crystal display unit 2, and the liquid crystal display device 1 can be used.
Can be used as a liquid crystal game device.

In the present embodiment, the case where three broadcasting systems and three types of liquid crystal display sections 40 are supported has been described. However, the types of broadcasting systems and the number thereof and the liquid crystal display section 4 are described.
It goes without saying that the type and number of 0 are not limited to the above.

<Second Embodiment> This embodiment is an embodiment in which scanning lines are thinned out.

When there is a difference in the number of scanning lines between the television broadcasting system, the driving method of the liquid crystal display section, and the structure of the liquid crystal display section, it becomes necessary to thin out the scanning lines.

Therefore, in this embodiment, the tuner unit thins out the scanning lines.

This embodiment is applied to a liquid crystal display device similar to the first embodiment, and in the description of this embodiment,
The same components as those in the first embodiment are designated by the same reference numerals and the description thereof will be omitted.

FIG. 4 is a diagram showing a liquid crystal display device 80 of this embodiment. The liquid crystal display device 80 of this embodiment includes a liquid crystal display unit 2 similar to that of the liquid crystal display device of the first embodiment. The tuner unit 3c is provided.

The tuner unit 3c includes the receiving circuit 60 and the liquid crystal drive interface circuit 81 similar to those in the first embodiment.

The receiving circuit 60 is the same as that shown in FIG. 3, and a detailed description thereof will be omitted.
Usually has an electronic tuning tuner 61, a television linear circuit 62, etc., corresponding to one broadcasting system,
The control circuit 65 controls the reception circuit 6 when the reception circuit 60 is created.
Information on which broadcasting method 0 was created, that is, information on the receiving broadcasting method is stored in the internal memory. Then, the control circuit 65 sends the broadcast type signal BS indicating the receiving broadcast system of the receiving circuit 60 to the liquid crystal drive interface circuit 8
Output to 1.

The control circuit 65 is provided with a sync separation circuit 65a and a basic clock generation circuit 65b as shown in FIG.

A sync signal is input from the television linear circuit 62 to the sync separation circuit 65a, and the sync separation circuit 65a generates a vertical sync signal φV and a horizontal sync signal φH from the sync signal to produce a liquid crystal drive interface. Output to the circuit 81.

Further, the basic clock generation circuit 65b generates a basic clock signal for synchronizing the operation of the liquid crystal drive interface circuit 81 described later and outputs it to the liquid crystal drive interface circuit 81.

As shown in FIG. 4, the liquid crystal drive interface circuit 81 includes a horizontal direction control circuit 82, a vertical direction control circuit 83, a mode selection circuit 84 and the like. The vertical direction display corresponds to the broadcasting system received by the receiving circuit 60 on the basis of the horizontal synchronizing signal φH and the vertical synchronizing signal φV input from the control circuit 65, in particular, the synchronizing separation circuit 65a, and performs thinning processing of scanning lines. A control signal and a horizontal display control signal are created and output to the control unit 42 of the liquid crystal display unit 2 via the mode selection circuit 84.

When the tuner unit 3c is mounted on the liquid crystal display unit 2, the control section 42 of the liquid crystal display unit 22 receives the display control signal input from the liquid crystal drive interface circuit 81 of the tuner unit 3c as it is, and the scanning side drive circuit 50. And to the data side drive circuit 51.

Note that, in FIG. 4, for the sake of easy understanding, it is described that the display control signal is directly output from the mode selection circuit 84 of the liquid crystal drive interface circuit 81 to the scanning side drive circuit 50 and the data side drive circuit 51. There is.

The above liquid crystal drive interface circuit 81
As described above, includes a horizontal direction control circuit 82, a vertical direction control circuit 83, and a mode selection circuit 84, the details of which are configured as shown in FIG.

That is, the horizontal direction control circuit 82 is similar to that shown in FIG.
As shown in FIG. 3, the SNB signal creation circuit 91, the STB signal creation circuit 92, the clock creation circuit 93, etc. are provided.
The vertical direction control circuit 83 includes an NTSC mode CNB signal generation circuit 94a and a PAL mode CNB signal generation circuit 94.
b, NTSC mode CDB signal generation circuit 95a, PAL
Mode CDB signal creation circuit 95b, NTSC mode CF
B signal generation circuit 96a, PAL mode CFB signal generation circuit 96b and NTSC mode drive timing control circuit 9
7a, PAL mode drive timing control circuit 97b and the like.

First, the horizontal control circuit 82 will be described.

Similar to the horizontal control circuit of the first embodiment, the horizontal control circuit 82 divides the basic clock signal input from the control circuit 65 to drive a plurality of types of liquid crystal display panels 11. A plurality of frequency dividing circuits for generating a clock signal for generating a horizontal control signal corresponding to a type such as a size, and a clock suitable for the type of the liquid crystal display panel 11 based on the clock signals output from the plurality of frequency dividing circuits. Although not shown in FIGS. 4 and 5, this selection circuit is provided with a selection circuit for selecting a signal, and the liquid crystal display is based on the liquid crystal type signal MS input from the control unit 42 of the liquid crystal display unit 2. A clock signal corresponding to the type of panel 11 is selected and output to the SNB signal creation circuit 91, STB signal creation circuit 92, and clock creation circuit 93.

The SNB signal generation circuit 91 is provided with a control circuit 65.
Sync signal input from the horizontal direction control circuit 82
S based on the clock signal input from the selection circuit in
The NB signal is generated and output to the mode selection circuit 84, and the SNB signal generated by the SNB signal generation circuit 91 is a so-called segment control signal, which is the data conversion circuit 64 to the control unit of the liquid crystal display unit 40. This is a signal for causing the data side drive circuit 51 to sequentially latch the display data input to the data side drive circuit 51 via 42 and to output the data signal corresponding to the stored display data to the liquid crystal display panel 11.

The STB signal generation circuit 92 is provided with the control circuit 65.
Sync signal input from the horizontal direction control circuit 82
S based on the clock signal input from the selection circuit in
A TB signal is generated and output to the mode selection circuit 84, and the STB signal generated by the STB signal generation circuit 92 is used to start the sampling of the display data by the data side drive circuit 51, that is, the sampling of the display data. It is a start signal.

The clock generating circuit 93 is based on the basic clock and the synchronizing signal input from the control circuit 65 via the selection circuit in the horizontal control circuit 82, and the two-phase basic clock signal CK1 of the data side drive circuit 51. , CK2 are generated and output to the mode selection circuit 84.

Next, the vertical control circuit 83 will be described.

NTSC mode C of vertical control circuit 83
The NB signal generating circuit 94a and the PAL mode CNB signal generating circuit 94b sequentially scan the scanning signals by sequentially shifting the scanning signals in the scanning side drive circuit 50 of the liquid crystal display unit 2 based on the synchronization signal input from the control circuit 65. The NTSC system and PAL system CNB signals for transferring signals are generated and output to the NTSC mode CDB signal generation circuit 95a and the PAL mode CDB signal generation circuit 95b, and also to the mode selection circuit 84.

NTSC mode CDB signal generation circuit 95a
And the PAL mode CDB signal generation circuit 95b is an NTS
C mode CNB signal generation circuit 94a and PAL mode C
Based on the CNB signal input from the NB signal generation circuit 94b, a CDB signal that determines the scan line start timing and the scan line selection width in the NTSC mode and the PAL mode is generated and output to the mode selection circuit 84.
This NTSC mode CDB signal generation circuit 115a and P
The AL mode CDB signal creation circuit 95b creates timing pulses for three scanning lines.

NTSC mode CDB signal generation circuit 95a
And the PAL mode CDB signal generation circuit 95b,
A CDB signal that has undergone thinning processing of the scanning lines is generated and output to the mode selection circuit 84.

That is, the NTSC mode CDB signal generation circuit 95a shifts the CDB signal by one line between the odd line and the even line which are adjacent to each other, and shifts the CDB signal by one line between the odd line and the even line. Shifts by 3 lines, and the mode selection circuit 84
Output to. Specifically, the NTSC mode CDB signal generation circuit 95a reads the CDB signal at the rising edge of the CNB signal shown in FIG. 6 and shifts at the falling edge of the CNB signal.

PAL mode CDB signal generation circuit 95b
Shifts the CDB signal by two lines between the odd line and the even line which are adjacent to each other, and shifts the CDB signal by two lines between the odd line and the even line which sandwich one scanning line.
It is shifted by 4 lines and output to the mode selection circuit 84. Specifically, the PAL mode CDB signal generation circuit 95
In b, the CDB signal is read at the rising edge of the CNB signal shown in FIG. 7 and is shifted at the falling edge of the CNB signal.

NTSC mode CFB signal generation circuit 96a
The PAL mode CFB signal generation circuit 96b performs 1 scan (1 scan based on the synchronization signal input from the control circuit 65).
H) The scanning signal is inverted every period to generate an NTSC mode and PAL mode CFB signal (inversion control signal) for AC driving the liquid crystal, and outputs the CFB signal to the mode selection circuit 84.

NTSC mode drive timing control circuit 9
7a and PAL mode drive timing control circuit 97b
Is provided with a shift register or the like, generates signals of NTSC system and PAL system for controlling the timing of each horizontal control signal in the scanning side drive circuit 50 of the liquid crystal display panel 2, and outputs them to the mode selection circuit 84. .

The mode selection circuit 84 receives the horizontal display control signal from each circuit of the horizontal control circuit 82, and the vertical display control of both the NTSC system and the PAL system from each circuit of the vertical control circuit 83. A signal is input, and a broadcast type signal BS indicating the type of the broadcast system received by the receiving circuit 60 is also input from the control circuit 65 of the receiving circuit 60, and the mode selection circuit 84 sets the horizontal direction control circuit 82 and the vertical direction. NTS input from the control circuit 83
Of the vertical display control signals of the C method and the PAL method,
The control unit 42 of the liquid crystal display unit 2 is selected by selecting a display control signal of a system corresponding to the broadcast system indicated by the broadcast type signal BS.
Output to.

Next, the operation of this embodiment will be described.

In the present embodiment, as described above, the horizontal direction control circuit 82 uses the liquid crystal display panel 1 based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2.
The clock signal corresponding to the type 1 is selected to generate a horizontal display control signal suitable for the type of the liquid crystal display panel 11, and the horizontal display control signal is output to the mode selection circuit 84.

That is, the SNB signal generation circuit 91, ST
The B signal generation circuit 92 and the clock generation circuit 93 are SNB signals suitable for the type of the liquid crystal display panel 11, based on the synchronization signal and the clock signal input from the control circuit 65.
STB signal and two-phase basic clock signals CK1 and CK2
The horizontal display control signal of the
Output to.

Further, the type of broadcasting system and the liquid crystal display panel 1
Depending on the type of 1, it is necessary to perform thinning processing of scanning lines.

Hereinafter, the case where the broadcasting system is the NTSC system and the case where the broadcasting system is the PAL system will be described separately.

First, the case where the broadcasting system is NTSC will be described.

When the broadcasting system is the NTSC system, the number of scanning lines in one field is 252 divided by 2 to 262.
Although the number of scanning lines is 5, the actual number of scanning lines is about 220 after subtracting about 40 which is the number of vertical blanking periods.

When displaying this NTSC system image,
If the number of scanning lines of the liquid crystal display panel 11 of a certain type of liquid crystal display unit 40 is 220, it is not necessary to thin out the liquid crystal display unit 40, but another type of liquid crystal display unit 40 is attached. If the number of scanning lines of the panel 11 is, for example, 146, it is necessary to perform thinning scanning for 74 scanning lines obtained by subtracting 146 from 220.

Therefore, in this embodiment, the vertical direction control circuit 83 thins out the horizontal scanning lines.

In the case of the NTSC system, if 220 scanning lines are divided by 74 which is the number of scanning lines that need to be thinned out,
It becomes about 3, and when thinning out at a ratio of 1 to 3 scanning lines, N
220 TSC scanning lines can be appropriately displayed on the liquid crystal display panel 11 having 146 scanning lines.

That is, in the vertical direction control circuit 83, the NTSC mode CNB signal generating circuit 94a generates the CNB signal shown in FIG. 6, and in the NTSC mode CDB signal generating circuit 95a, the NTSC mode scan line start timing and scanning. A CDB signal that determines the line selection width is generated. The CDB signal is a timing pulse for three scanning lines (3H) as shown in FIG.

NTSC mode CDB signal generation circuit 95a
Shifts the CDB signal by 1 line between adjacent odd lines and even lines, and shifts by 3 lines between odd lines or even lines sandwiching one scanning line to select a mode. Output to the circuit 84.

NTSC mode CFB signal generation circuit 96a
As described above, the CFB signal (inversion control signal) is generated and output to the mode selection circuit 84, and the NTSC mode drive timing control circuit 97a generates the timing control signal and outputs it to the mode selection circuit 84. .

Then, the mode selection circuit 84 causes the control circuit 65 to send the broadcast type signal B indicating the NTSC system.
When S is input, the horizontal display control signals such as the SNB signal and the STB signal input from the horizontal control circuit 82 are output to the liquid crystal display panel 2, and the signals of the NTSC mode system of the vertical control circuit 83 are output. Creation circuit 94a, 9
5a, 96a and CNB signal which is a vertical display control signal input from the drive timing control circuit 97a, CD
The B signal, the CFB signal and the timing control signal are selected and output to the liquid crystal display unit 2.

The horizontal display control signal and the vertical display control signal are output to the scanning side driving circuit 50 and the data side driving circuit 51 via the control section 42 of the liquid crystal display unit 2, and the scanning side driving circuit 50 scans the scanning lines. The liquid crystal display panel 11 is driven by the data signal from the data side drive circuit 51 in the state where thinning is performed for every three lines.

That is, the CDB signal is now NTSC.
The mode CDB signal generating circuit 95a shifts one line between the odd line and the even line adjacent to each other, and shifts three lines between the odd line and the even line sandwiching one scanning line. Therefore, as shown in FIG. 6, the scan drive signals X1 to Xn are
Every 3 lines are thinned out.

Incidentally, FIG. 6 shows a state in which V2 is the central voltage of the scanning drive signal, VDD is a high voltage, V4 is a low voltage, and an AC voltage scanning drive signal is applied.
Of these, the shaded portions are thinned lines.

That is, for example, 5 of the horizontal synchronizing signal φH
The sixth line indicates that the scanning drive signal X3 is thinned out of the scanning drive signals X1, X2, and X3, and the sixth line indicates that the scanning drive signals X2, X2 have been skipped.
3 and X4, the scanning drive signal X4 is thinned out.

Therefore, when the receiving circuit 60 of the tuner unit 3c receives television waves of the NTSC broadcasting system, and when the liquid crystal display panel 11 has 146 scanning lines, one of 220 scanning lines. The NTSC mode CDB signal generation circuit 95a of the vertical direction control circuit 83 performs thinning-out processing for thinning out the scanning lines at a rate of one out of three lines, so that the liquid crystal display panel 11 of 146 scanning lines is displayed. It can be driven appropriately and displayed.

Next, the case where the broadcasting system is the PAL system will be described.

When the broadcasting system is the PAL system, the number of scanning lines in one field is 625 divided by 2, which is 312.5.
However, the actual number of scanning lines is about 272 after subtracting about 40 which is the number of vertical blanking periods.

When displaying this PAL system image, if the number of scanning lines of the liquid crystal display panel 11 of the liquid crystal display unit 40 of a certain type is 272, it is not necessary to thin out the liquid crystal display unit 40. The number of scanning lines of the liquid crystal display panel 11 is
For example, if there are 220 lines, it is necessary to perform thinning-out scanning for 52 scanning lines obtained by subtracting 220 lines from 272 lines.
That is, if 272 lines are divided by 52 lines, it is necessary to perform thinning-out scanning at a ratio of 1 line to 5 lines.

If the number of scanning lines of the liquid crystal display panel 11 is 146, it is necessary to thin out 126 scanning lines obtained by subtracting 146 from 272. Now, assuming that the number of scanning lines of the liquid crystal display panel 11 is 146, it is necessary to thin out every two lines.

Therefore, in the present embodiment, thinning is performed at a rate of one for every two scanning lines (actually two for every four scanning lines).

That is, if 272 lines are divided by 126 lines,
It becomes about 2, and when thinning out at a ratio of 2 to 4 scan lines, P
272 scanning lines of the AL system can be appropriately displayed on the liquid crystal display panel 11 having 146 scanning lines.

That is, in the vertical direction control circuit 83, the PAL mode CNB signal generation circuit 94b generates the CNB signal shown in FIG. 7, and the PAL mode CDB signal generation circuit 95b causes the PAL mode scan line start timing and scanning. Generate a CDB signal that determines the line selection width,
It is output to the mode selection circuit 84. The CDB signal is a timing pulse for four scanning lines (4H) as shown in FIG.

That is, the PAL mode CDB signal generating circuit 95b shifts the CDB signal by two lines between the odd line and the even line which are adjacent to each other, and shifts between the odd line and the even line sandwiching one scanning line. Is shifted by 4 lines and the mode selection circuit 8
Output to 4.

PAL mode CFB signal generation circuit 96b
As described above, the CFB signal (inversion control signal) is generated and output to the mode selection circuit 84, and the PAL mode drive timing control circuit 97b generates the timing control signal and output to the mode selection circuit 84. To do.

Then, the mode selection circuit 84 causes the control circuit 65 to send a broadcast type signal BS indicating the PAL system.
Is input, the horizontal display control signals such as the SNB signal and the STB signal input from the horizontal control circuit 82 are output to the liquid crystal display panel 2, and the PAL mode system signals of the vertical control circuit 83 are generated. Circuits 94b, 95
CN which is a vertical display control signal in the PAL mode input from the drive timing control circuit 97b and the drive timing control circuit 97b.
The B signal, the CDB signal, the CFB signal and the timing control signal are selected and output to the liquid crystal display unit 2.

The horizontal display control signal and the vertical display control signal are output to the scan side drive circuit 50 and the data side drive circuit 51 via the control section 42 of the liquid crystal display unit 2, and the scan side drive circuit 50 is scanned. The liquid crystal display panel 1 is driven by the data signal from the data side drive circuit 51 while the drive circuit 50 thins out every four scan lines.
Drive 1

Then, the CDB signal is the PAL mode CD.
The B signal generating circuit 95b shifts two lines between odd lines and even lines adjacent to each other, and shifts four lines between odd lines or even lines sandwiching one scanning line. So Figure 7
As shown in, the scanning drive signals X1 to Xn are thinned out every two lines in four lines.

That is, in FIG. 7, V2 is the center voltage of the scan drive signal, VDD is a high voltage, and V4 is a low voltage.
The figure shows a state in which a scan drive signal of an AC voltage is applied, and among these, the hatched portions are thinned lines.

Specifically, for example, in the seventh and eighth lines of the horizontal synchronizing signal φH, the scanning drive signals X1 and X
Of 2, 2, X3, and X4, the scanning drive signal X3 and the scanning drive signal X4 are thinned out.

Therefore, the receiving circuit 60 of the tuner unit 3c receives the television radio wave of the PAL broadcasting system, and the scanning line of the liquid crystal display panel 11 is 1
When the number of lines is 46, the PAL mode CDB signal generation circuit 95b of the vertical direction control circuit 83 can perform thinning-out processing at a rate of 2 lines to 4 lines to appropriately drive.

As described above, in the present embodiment, the liquid crystal drive interface circuit 101 has the liquid crystal display panel according to the type (specification) of the liquid crystal display unit 2, particularly the liquid crystal display section 40 and the broadcasting system received by the receiving section. Since the eleven scanning lines are thinned out, the display drive more suitable for the specifications of the liquid crystal display unit 11 and the broadcasting system can be performed, and the display performance can be improved.

In this embodiment, the broadcasting system is N
There are two types of the TSC system and the PAL system, and the thinning process when the number of scanning lines of the liquid crystal display panel 11 is 146 in the two types of broadcasting systems has been described. The type of the liquid crystal display panel 11 is not limited to those of 146 scanning lines and those of sequentially driving the scanning lines.

<Third Embodiment> This embodiment is an embodiment in which the driving method of the liquid crystal display panel is switched, and the driving method is selected in accordance with the number of scanning lines of the liquid crystal display panel of the liquid crystal display section to obtain the contrast. Is an example of adjusting

Therefore, in this embodiment, the tuner unit is provided with a circuit for driving the liquid crystal by a plurality of driving methods, and the contrast is adjusted by selecting the driving method.

This embodiment is applied to a liquid crystal display device similar to that of the first embodiment, and in the description of this embodiment, the same components as those of the first embodiment are designated by the same reference numerals. The description is omitted.

FIG. 8 is a diagram showing the liquid crystal display device 100 of the present embodiment. The liquid crystal display device 100 of the present embodiment is the first
A liquid crystal display unit 2 similar to the liquid crystal display device of the embodiment is provided, and a tuner unit 3d is provided.

The tuner unit 3d includes the receiving circuit 60 and the liquid crystal drive interface circuit 101 similar to those in the first embodiment.

The receiving circuit 60 is the same as that shown in FIG. 3, and a detailed description thereof will be omitted.
Usually has an electronic tuning tuner 61, a television linear circuit 62, etc., corresponding to one broadcasting system,
The control circuit 65 of the receiving circuit 60 generates the vertical synchronizing signal φV and the horizontal synchronizing signal φH as described above and outputs them to the interface circuit 101.

The above liquid crystal drive interface circuit 101
8 includes a horizontal direction control circuit 102, a vertical direction control circuit 103, a mode selection circuit 104, and the like, and the mode selection circuit 104 includes a liquid crystal type signal from the control unit 42 of the liquid crystal display unit 2. MS is entered.

The liquid crystal drive interface circuit 101
The horizontal direction control circuit 102, as shown in FIG.
An NB signal creation circuit 111, an STB signal creation circuit 112, and a clock creation circuit 113 are provided, and the vertical direction control circuit 103 is provided with a CNB signal creation circuit 114, a divided CDB signal creation circuit 115, and a CFB signal creation circuit 116. .

The horizontal control circuit 102 is similar to the horizontal control circuit of the second embodiment, and divides the basic clock signal input from the control circuit 65 to correspond to a plurality of types of liquid crystal display panels 11. A plurality of frequency dividing circuits for generating a clock signal for generating a horizontal display control signal, and a clock signal suitable for the type of the liquid crystal display panel 11 are selected from the clock signals output by the plurality of frequency dividing circuits. It has a selection circuit.

Although not shown in FIGS. 8 and 9, this selection circuit generates a clock signal corresponding to the type of the liquid crystal display panel 11 based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2. It is selected and output to the SNB signal creation circuit 111, the STB signal creation circuit 112, and the clock creation circuit 113.

Configurations of the SNB signal generation circuit 111, the STB signal generation circuit 112 and the clock generation circuit 113,
The operation is similar to that of the second embodiment described above, and detailed description thereof is omitted.

The CNB signal generating circuit 114 of the vertical direction control circuit 103 has a predetermined broadcasting system, for example, NTS, on the basis of the synchronization signal input from the control circuit 65.
The C-system scan signal is sequentially shifted in the scan-side drive circuit 50 of the liquid crystal display unit 2 to generate a CNB signal for transferring the scan signal, which is output to the divided CDB signal generation circuit 115 and the mode selection circuit 104. Output to.

The frequency division CDB signal generation circuit 115 includes a frequency division circuit 117 and a CDB signal generation circuit 11 as shown in FIG.
CDB signal for driving one line (hereinafter referred to as 1α mode CDB signal), CDB signal for simultaneously driving two lines (hereinafter referred to as 2α mode CDB signal), and CDB for simultaneously driving three lines. Signal (hereinafter,
It is called a 3α mode CDB signal. ) Is generated.

That is, the frequency dividing circuit is composed of, for example, a timing synchronizing circuit and two frequency dividing circuits, and the timing synchronizing circuit includes a control circuit 65 of the receiving circuit 60.
The horizontal synchronizing signal φH and the clock pulse φ are input from. The timing synchronizing circuit generates a timing pulse corresponding to one scanning (1H) period based on the horizontal synchronizing signal φH and the clock pulse φ, and outputs the timing pulse to the frequency dividing circuit and the CDB signal generating circuit 118. One of the frequency dividing circuits divides the timing pulse corresponding to 1H input from the timing synchronizing circuit to generate a timing pulse corresponding to 2H, and the other frequency dividing circuit and the CDB signal generating circuit 1
Output to 18. The other frequency dividing circuit divides the timing pulse corresponding to 2H input from the first frequency dividing circuit to generate a timing pulse corresponding to 3H, and outputs the timing pulse to the CDB signal generation circuit 118.

The CDB signal generation circuit 118 is composed of three CDs.
Each of the CDB signal generating circuits includes a timing pulse corresponding to the 1H period, a timing pulse corresponding to the 2H period, and a timing pulse corresponding to 3H, which are input from the frequency dividing circuit 117. As shown in FIG. 10, a 1α mode CD that drives one line
A B signal, a 2α mode CDB signal that simultaneously drives two lines, and a 3α mode CDB signal that simultaneously drives three lines are generated and output to the mode selection circuit 104.

The CDB signal is a signal for generating a scanning signal, and is a signal for determining the scanning start timing of the scanning line and the selection width of the scanning line.

The vertical synchronizing signal φV and the horizontal synchronizing signal φH are input from the control circuit 65 of the receiving circuit 60 to the CFB signal generating circuit 116 of the vertical direction control circuit 103,
The CFB signal generation circuit 116 outputs C from these synchronization signals.
The FB signal is generated and output to the mode selection circuit 104. This CFB signal is an inversion signal for alternating the frame and alternating-current driving the liquid crystal.

The mode selection circuit 104 is formed of, for example, a multiplexer, and the mode selection circuit 104 includes an SNB signal, an STB signal and a clock signal C which are horizontal display control signals from the horizontal control circuit 102.
K1 and CK2 are input, the CNB signal, the CDB signal, and the CFB signal, which are vertical display control signals from the vertical control circuit 103, are input, and the liquid crystal type from the control unit 42 of the liquid crystal display unit 2 is further input. Signal MS
Has been entered.

Particularly, from the CDB signal generation circuit 118 of the vertical direction control circuit 103, the 1α mode CDB signal, 2α mode
The mode CDB signal and the 3α mode CDB signal are input to the mode selection circuit 104.

The mode selection circuit 104 uses the liquid crystal type signal M.
One of the three types of CDB signals is selected by S and the vertical display control signal and the horizontal display control signal are output to the control unit 42 of the liquid crystal display unit 2.

That is, in the mode selection circuit 104, the control section 42 of the liquid crystal display unit 2 to the liquid crystal display section 40.
The liquid crystal type signal MS indicating the type of the driving method is input,
The mode selection circuit 104 selects one of the 1α mode CDB signal, the 2α mode CDB signal, and the 3α mode CDB signal based on the liquid crystal type signal MS, and selects the vertical display control signal and the horizontal display control signal. Is output to the control unit 42 of the liquid crystal display unit 2.

That is, the liquid crystal drive interface circuit 101 generates CDB signals of three types of drive methods based on the synchronizing signal input from the control circuit 65 of the receiving circuit 60, and the liquid crystal input from the liquid crystal display unit 2. Based on the type signal MS, a CDB signal suitable for the driving method of the liquid crystal display unit 40 is selected, and a control unit of the liquid crystal display unit 2 is selected as a vertical display control signal and a horizontal display control signal suitable for the liquid crystal display unit 40. To 42.

When the tuner unit 3d is attached to the liquid crystal display unit 2, the control unit 42 receives the display control signal input from the liquid crystal drive interface circuit 101 of the tuner unit 3d as it is, the scanning side drive circuit 50 and the data side drive circuit. Output to 51.

In FIG. 8 and FIG. 9, for easy understanding, the display control signal is output from the mode selection circuit 104 of the liquid crystal drive interface circuit 101 directly to the scan side drive circuit 50 and the data side drive circuit 51. Have been described.

Next, the operation of this embodiment will be described.

In the liquid crystal display device 100 of the present embodiment, the receiving circuit 60 of the tuner unit 3d receives the television broadcast radio wave of the predetermined broadcasting system, as in the above embodiments.
The display data is output from the data conversion circuit 64 to the control unit 42 of the liquid crystal display unit 2. Further, the control circuit 65 outputs a synchronizing signal to the horizontal direction control circuit 102 and the vertical direction control circuit 103 of the liquid crystal drive interface circuit 101.

The horizontal direction control circuit 102 uses a driving method suitable for the type of the liquid crystal display section 40 of the liquid crystal display unit 2 based on the synchronizing signal input from the control circuit 65, as in the second embodiment. A horizontal display control signal is generated and output to the liquid crystal display unit 2.

Further, the vertical direction control circuit 103 generates a vertical display control signal by a driving method suitable for the type of the liquid crystal display section 40 of the liquid crystal display unit 2 based on the synchronization signal input from the control circuit 65, Output to the liquid crystal display unit 2.

That is, the horizontal direction control circuit 102, as described above, is based on the liquid crystal type signal MS input from the control section 42 of the liquid crystal display unit 2, and the liquid crystal display panel 11 is operated.
, A horizontal control signal suitable for the type of the liquid crystal display panel 11 is generated and output to the mode selection circuit 104.

That is, the SNB signal generation circuits 111, S
TB signal generation circuit 112 and clock generation circuit 113
Is an SN suitable for the type of the liquid crystal display panel 11 based on the synchronization signal and the clock signal input from the control circuit 65.
B signal, STB signal and two-phase basic clock signal CK
1, a horizontal control signal of CK2 is generated, and a mode selection circuit 1
Output to 04.

Further, in the vertical direction control circuit 103, as shown in FIG. 9, the CNB signal generating circuit 114 generates a CNB signal and outputs it to the divided CDB signal generating circuit 115 and the mode selection circuit 104 to divide it. CDB signal generation circuit 11
5 generates a 1α mode CDB signal, a 2α mode CDB signal and a 3α mode CDB signal, and the mode selection circuit 1
Output to 04. The CFB signal generation circuit 116 generates a CFB signal from the synchronization signal input from the control circuit 65 and outputs it to the mode selection circuit 104.

That is, the divided CDB signal generation circuit 115
Includes a frequency dividing circuit 117 and a CDB signal generating circuit 118. The frequency dividing circuit 117 generates a timing pulse corresponding to one scanning (1H) period, a timing pulse corresponding to 2H, and a timing pulse corresponding to 3H. It is generated and output to the CDB signal generation circuit 118.

As shown in FIG. 10, the CDB signal generating circuit 118 drives 1 line from the timing pulse corresponding to the 1H period input from the frequency dividing circuit 117, 1α.
A mode CDB signal is generated from a timing pulse corresponding to a 2H period, a 2α mode CDB signal that simultaneously drives two lines, and a timing pulse corresponding to a 3H period is generated a 3α mode CDB signal that simultaneously drives three lines. , To the mode selection circuit 104.

The CDB signal is a signal for generating a scanning signal, and is a signal for determining the scanning start timing of the scanning line and the selection width of the scanning line.

The mode selection circuit 104 receives three types of CDBs from the CDB signal generation circuit 118 based on the liquid crystal type signal MS indicating the type of the liquid crystal display unit 40 input from the control unit 42 of the liquid crystal display unit 2. One of the signals is selected and output to the control unit 42 of the liquid crystal display unit 2 as a vertical display control signal, and the horizontal display control signal input from the horizontal control circuit 102 is controlled by the liquid crystal display unit 2. It is output to the unit 42.

That is, the liquid crystal drive interface circuit 101 generates CDB signals of three types of drive methods based on the synchronizing signal input from the control circuit 65 of the receiving circuit 60, and the liquid crystal input from the liquid crystal display unit 2. Based on the type signal MS, a CDB signal suitable for the driving method of the liquid crystal display unit 40 is selected, and a control unit of the liquid crystal display unit 2 is selected as a vertical display control signal and a horizontal display control signal suitable for the liquid crystal display unit 40. To 42.

Therefore, in the liquid crystal drive interface circuit 101, the liquid crystal display section 40 of the liquid crystal display unit 2 is
In the α driving method, the 1α mode CDB signal is selected and output to the control unit 42 of the liquid crystal display panel 2, and the control unit 4
2 outputs a vertical direction control signal and a horizontal direction display control signal including the 1α mode CDB signal to the liquid crystal display unit 40. As a result, the liquid crystal display panel 11 of the liquid crystal display unit 40.
As shown in FIG. 10, the scanning lines are driven line by line by the scanning drive signals X1 to Xn based on the 1α mode CDB signal, and so-called 1α driving is performed.

Further, the liquid crystal drive interface circuit 10
When the liquid crystal display unit 40 of the liquid crystal display unit 2 is in the 2α driving method, 1 selects the 2α mode CDB signal and outputs it to the control unit 42 of the liquid crystal display panel 2, and the control unit 42
The vertical control signal and the horizontal display control signal including the 2α mode CDB signal are output to the liquid crystal display unit 40. As a result, the liquid crystal display panel 11 of the liquid crystal display unit 40 is
As shown in 0, based on the 2α mode CDB signal, the scanning lines are driven by the scanning drive signals X1 to Xn every two lines, so-called 2α driving is performed.

Further, the liquid crystal drive interface circuit 1
01 is for selecting the 3α mode CDB signal when the liquid crystal display unit 40 of the liquid crystal display unit 2 is in the 3α driving method,
Output to the control unit 42 of the liquid crystal display panel 2, and the control unit 42
Outputs the vertical control signal and the horizontal display control signal including the 3α mode CDB signal to the liquid crystal display unit 40. As a result, the liquid crystal display panel 11 of the liquid crystal display unit 40.
As shown in FIG. 10, based on the 3α mode CDB signal, the scanning lines are driven by the scanning drive signals X1 to Xn every three lines, and so-called 3α driving is performed.

Therefore, it is possible to drive the liquid crystal display unit 40 of the liquid crystal display unit 2 in an appropriate manner depending on the type, particularly, the driving method, and to make the contrast of the liquid crystal display panel 11 appropriate.

Further, in the third embodiment, the liquid crystal display unit 2, particularly the control section 42 of the liquid crystal display unit 2 is used.
Although the CDB signal suitable for the driving method of the liquid crystal display unit 40 is selected based on the liquid crystal type signal MS from, the present invention is not limited to this. For example, as shown by a broken line in FIG. 3d may be provided with a mode selection switch 104, and the mode selection switch 104 may be used to manually switch as appropriate. By doing so, the driving method of the liquid crystal display unit 40 can be appropriately switched, and the contrast of the liquid crystal display panel 11 of the liquid crystal display unit 2 can be appropriately adjusted.

Furthermore, in the third embodiment, 1α
The case where the driving, the 2α driving, and the 3α driving are switched has been described. However, the driving method of the liquid crystal display unit 40 is not limited to these, and the liquid crystal driving interface circuit 101 has a vertical direction corresponding to the plurality of driving methods. / A horizontal direction control circuit may be provided.

In the third embodiment, the liquid crystal drive interface circuit 101 has the horizontal direction control circuit 102 and the vertical direction control circuit 10 corresponding to one broadcasting system.
Although the case of including 3 is described, a vertical / horizontal direction control circuit that generates vertical and horizontal display control signals corresponding to a plurality of driving methods may be provided corresponding to a plurality of broadcasting systems.

Although the invention made by the present inventor has been specifically described based on the preferred embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

For example, in each of the above embodiments, the tuner unit is provided with the liquid crystal drive interface circuit for performing the drive suitable for the type of the display section 40 of the liquid crystal display unit 2, but the present invention is not limited to this, and for example, The liquid crystal display unit 2 may be provided with the liquid crystal drive interface circuit described in each of the above embodiments.

[0205]

According to the liquid crystal display device of the first aspect,
The receiving unit receives TV radio waves of any of the multiple types of broadcasting system, the drive control unit supports multiple types of liquid crystal display units, and the multiple types of broadcasting systems including the broadcasting system received by the receiving unit. Generate a display drive signal based on the drive method corresponding to, and select a display drive signal corresponding to a predetermined broadcasting system from the display drive signal, and select a display drive signal corresponding to a predetermined broadcasting system to display the liquid crystal display unit. To drive.

As a result, it is possible to drive a plurality of types of liquid crystal display units while supporting the TV radio waves of a plurality of types of broadcast systems without manufacturing the drive control unit according to the type of the broadcast system and the liquid crystal display unit. It is possible to easily and inexpensively manufacture a liquid crystal display device that can be manufactured without performing a duplicate manufacturing process.

Further, as described in claim 2, the liquid crystal display unit notifies the drive control unit of its own type, and based on the notification, the liquid crystal display unit mounted from the plurality of types of drive control units is displayed. If the display drive signal corresponding to the type is selected, the display drive signal corresponding to the type of the liquid crystal display unit can be automatically selected to drive the liquid crystal display unit. It is possible to improve convenience.

[0208] Further, as described in claim 3, the receiving unit notifies the drive control unit of the type of the broadcast system to be received, and based on the notification, receives from the drive control units of a plurality of types of broadcast systems. By selecting the drive control unit corresponding to the type of broadcasting system received by the unit, the liquid crystal display unit can be driven by automatically selecting the display drive signal corresponding to the type of broadcasting system. The convenience in using the display device can be further improved.

According to the liquid crystal display device of the fourth aspect of the present invention, a plurality of types of sub-units can be detachably attached to the liquid crystal display unit, and the liquid crystal display unit discriminates the type of the attached sub-unit. In addition to driving and controlling the liquid crystal display unit according to the type of the sub-unit, one of the sub-units is a tuner unit that receives TV radio waves of an arbitrary broadcasting system, and is compatible with the broadcasting system. A drive control unit corresponding to a plurality of types of liquid crystal display units is selected, and a display drive signal generated by the drive control unit is output to the liquid crystal display unit.

Therefore, various sub-units can be mounted on a plurality of types of liquid crystal display units, and display driving suitable for the mounted sub-units can be automatically performed, and the sub-units can support a plurality of types of broadcasting systems. At the same time, it is possible to drive the liquid crystal display unit by selecting display drive signals corresponding to a plurality of types of liquid crystal display units.

As a result, a liquid crystal display device corresponding to a plurality of broadcasting systems and corresponding to a plurality of types of liquid crystal display units can be manufactured easily and inexpensively without manufacturing a different liquid crystal drive circuit for each liquid crystal display unit. It is possible,
The liquid crystal display unit can be effectively used.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a first embodiment of a liquid crystal display device of the present invention.

FIG. 2 is a circuit block diagram of the liquid crystal display unit of FIG.

3 is a circuit block diagram of the tuner unit and the liquid crystal display unit of FIG.

FIG. 4 is a circuit block diagram of a tuner unit and a liquid crystal display unit of a second embodiment of the liquid crystal display device of the present invention.

5 is a detailed circuit block diagram of the liquid crystal drive interface circuit of FIG.

FIG. 6 is a timing chart of each signal when scanning lines are thinned out at a ratio of one in three lines.

FIG. 7 is a timing chart of each signal when scanning lines are thinned out at a ratio of two to four lines.

FIG. 8 is a circuit block diagram of a tuner unit and a liquid crystal display unit of a third embodiment of the liquid crystal display device of the present invention.

9 is a detailed circuit block diagram of the liquid crystal drive interface circuit and the liquid crystal display panel of FIG.

FIG. 10 is a timing chart of each signal when 1α driving, 2α driving, and 3α driving are performed.

[Explanation of symbols]

 1, 80, 100 Liquid crystal display device 2 Liquid crystal display unit 3 Sub unit 3a, 3c to 3d Tuner unit 3b Game unit 10 Main body case 11 Liquid crystal display panel 25 Rod antenna 26, 31 Terminal section 40 Liquid crystal display section 41 Storage section 42 Control section 43 power supply unit 44 liquid crystal drive circuit 45 liquid crystal type signal generation unit 46 operation unit 50 scanning side drive circuit 51 data side drive circuit 60 reception circuit 61 electronic tuning tuner 62 television linear circuit 63 A / D conversion circuit 64 data conversion circuit 65 control circuit 70, 81, 101 Liquid crystal drive interface circuit 71-73 Vertical / horizontal direction control circuit 71a-73a Vertical direction control circuit 71b-73b Horizontal direction control circuit 74, 75 Selection circuit 82, 102 Horizontal direction control circuit 83, 103 Vertical direction control Circuit 8 , 104 Mode selection circuit 91, 111 SNB signal creation circuit 92, 112 STB signal creation circuit 93, 113 Clock creation circuit 94a NTSC mode CNB signal creation circuit 94b PAL mode CNB signal creation circuit 95a NTSC mode CDB signal creation circuit 95b PAL mode CDB Signal generation circuit 96a NTSC mode CFB signal generation circuit 96b PAL mode CFB signal generation circuit 97a NTSC mode drive timing control circuit 97b PAL mode drive timing control circuit 105 mode selection switch 114 CNB signal generation circuit 115 frequency division CDB signal generation circuit 116 CFB signal Creating circuit 117 Dividing circuit 118 CDB signal creating circuit

Claims (4)

[Claims] 1. A liquid crystal display unit of a plurality of types, a receiving unit for receiving television radio waves of a broadcasting system of a plurality of types, and a plurality of types of liquid crystal including at least the type of the liquid crystal display unit. A plurality of types of drive control units that correspond to the display unit and generate display drive signals based on drive methods corresponding to a plurality of types of broadcast systems, including broadcast systems received by the receiving unit, and the plurality of types of drive controls. Selecting means for selecting a drive control unit corresponding to a predetermined liquid crystal display unit and a predetermined broadcast system from among the units, and providing a display drive signal generated by the selected drive control unit to the liquid crystal display unit. And a liquid crystal display device. 2. The liquid crystal display section includes a liquid crystal type generation means for notifying the drive control section of its own type, and the selection means drives the plurality of types based on the notification from the liquid crystal type generation means. 2. The liquid crystal display device according to claim 1, wherein a drive control unit corresponding to the type of the mounted liquid crystal display unit is selected from the control units. 3. The receiving unit includes a broadcast type notifying unit for notifying the drive control unit of the type of the broadcast system that the receiving unit receives, and the selecting unit is based on the notification from the broadcast type notifying unit. The liquid crystal display device according to claim 1 or 2, wherein a drive control unit corresponding to a type of a broadcast system received by the receiving unit is selected from the drive control units of the plurality of types of broadcast systems. 4. A liquid crystal display device comprising: a liquid crystal display unit; and a plurality of types of sub-units detachably attached to the liquid crystal display unit for supplying at least display data, wherein the liquid crystal display unit is optional. The type of liquid crystal display panel, a drive circuit for driving the liquid crystal display panel, and a type of the mounted sub-unit, and a liquid crystal display panel through the drive circuit corresponding to the type of the sub-unit. A sub-unit is a tuner unit for receiving at least one TV radio wave, and the tuner unit receives a TV radio wave of an arbitrary broadcasting system and outputs its video data. A receiving unit that outputs display data to the liquid crystal display unit, and a plurality of types of liquid crystal display including the type of the liquid crystal display panel. A plurality of types of drive control units corresponding to the panel and generating display drive signals based on drive methods corresponding to a plurality of types of broadcast systems including the broadcast system received by the receiving unit; and the plurality of types of drive control units. A drive control unit corresponding to the mounted predetermined liquid crystal display panel from among, and corresponding to a predetermined broadcasting system received by the receiving unit,
A liquid crystal display device, comprising: a selection unit that provides the liquid crystal display unit with a display drive signal generated by the selected drive control unit.