KR20040025407A - Apparatus for controlling AV signal of monitor - Google Patents

Abstract

PURPOSE: A device for controlling an AV signal output of a monitor is provided to convert digital signals of a video decoder into RGB signals via the first switching block, and to output the converted RGB signals by using a D-sub connector, thereby functioning as another AV monitor through a projector. CONSTITUTION: External jacks input AV signals. A video decoder(26) processes the inputted AV signals. The first switching block(27) selectively switches outputs of the video decoder(26), and outputs the switched outputs. A scaler(29) scales output signals of the video decoder(26) with resolution of an LCD module(33). An RGB converter IC(28) converts the output signals of the video decoder(26) into RGB signals. The second switching block(34) outputs the RGB signals to another monitor through a D-sub connector(21). A TMDS(Transition Minimized Differential Signal)-RX unit(24) processes signals inputted through a DVI(Digital Visual Interface)(22), and outputs the processed signals to the scaler(29). A TMDS-TX/LVDS(Low Voltage Differential Signal) unit(32) converts signals outputted from the scaler(29), and outputs the converted signals to the LCD module(33).

Description

Apparatus for controlling AV signal of monitor

The present invention relates to the signal output of the monitor, in particular, to configure the output terminal using the D-sub connector to output the AV signal, AV signal output control of the monitor to enable the display using another display device without the AV function Relates to a device.

In general, the monitor receives the horizontal sync signal, the vertical sync signal, and the R, G, and B video signals through the D-sub connector. As the resolution of the monitor increases, the high frequency characteristic is good. A BNC (Bayinet Neil Concelman) connector is also provided.

In addition, the Digital Display Working Group (DDWG) has announced the DVI (Digital Visual Interface) standard, which defines DVI-D as a signal source that only supports digital video signals, and DVI when it supports both digital and analog video signals. It is defined as -I.

Hereinafter, a signal output device of a monitor of the prior art will be described with reference to the accompanying drawings.

1 is a block diagram showing the configuration of a signal output system of a monitor of the prior art.

The signal output system of the monitor of the prior art is first composed of an ADC (2) for digitally converting (24/48 bits) analog signals (R, G, B, H, V) input from the D-sub connector (1). Transition Minimized Differential Signal-RX (4) which converts (24 / 48bit) the signal input from DVI (Digital Visual Interface) (3) so that the Scaler (5) can process it, and AV A video decoder for converting signals (YUV, YC, TV-Video) output from the (CVBS / S-VHS) or the TV tuner 6 into signals (8/16 bits) that can be processed by the scaler 5. (7), a scaler (5) for scaling signals output from the ADC (2), the TMDS receiver (4) and the video decoder (7) to a resolution suitable for the liquid crystal display (LCD) module 10, TMDS transmitter (TMDS-TX) / Low Voltage Differential Signal (LVDS) 9 for converting the signal output from the scaler 5 to suit the LCD module 10, and for controlling the blocks related to the signal processing. Consists includes a microcomputer (8).

Here, the number of data transmission bits supported by a graphics controller commonly used to implement high resolution is limited. To solve this problem, Low Voltage Differential Signaling (LVDS) is used at an interface between a computer main body and a liquid crystal module.

The user can view the picture in picture (PIP) by simultaneously processing the signal coming into the D-sub connector 1 or the DVI (3) jack and the signal coming through the AV jack in the scaler 5.

However, such a signal output device of the prior art monitor has the following problems.

Since a monitor having a signal processing function, that is, a TV function has one output terminal, it is impossible to display an image using another monitor or a projector that does not include a TV function.

That is, since the monitor of the prior art can display only in the set, it causes a problem of limiting the application range of the monitor.

The present invention is to solve the problem of the signal output device of the prior art monitor, the display using the other display device without the AV function by configuring the output terminal using the D-sub connector to output the AV signal It is an object of the present invention to provide an apparatus for controlling AV signal output of a monitor.

1 is a block diagram showing the configuration of a signal output system of a monitor of the prior art;

Figure 2 is a block diagram showing the configuration of the signal output system of the monitor according to the present invention

Explanation of symbols for the main parts of the drawings

21.D-sub connector 22.DVI

23.ADC 24.TMDS-RX

25. TV Tuner 26. Video Decoder

27. First Switching Block 28. RGB Converter IC

29. Scaler 30. Micom

31.User Interface 32.TMDS-TX / LVDS

33. LCD module 34. Second switching block

The apparatus for controlling AV signal output of a monitor according to the present invention for achieving the above object includes: external jacks for inputting an AV signal; a video decoder for processing an AV signal input through the external jacks; selectively outputting the output of the video decoder A first switching block for switching output; a scaler for scaling an output signal of a video decoder outputted by switching to a resolution suitable for an LCD module; an RGB converter IC for converting an output signal of a switched video decoder to an RGB signal; the RGB signal It characterized in that it comprises a second switching block for outputting to the other monitor through the D-sub connector which is one of the external jacks.

Hereinafter, an AV signal output control apparatus of a monitor according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram showing the configuration of the signal output system of the monitor according to the present invention.

The present invention makes another output separately using a D-sub (D Type-sub miniature) connector so that it can be connected to another monitor (when using Dual Monitor) or a projector that does not include a TV function, if necessary. It is to.

The configuration first of all converts the analog signals (R, G, B, H, V) input from the D-sub connector 21 and the signals converted by the RGB converter IC 28 to switch the ADC 23 or the D-. a second switching block 34 output to the sub connector 21, an ADC 23 for digitally converting (24/48 bits) the output signal of the second switching block 34, and a DVI (Digital Visual Interface) ( 22) Transition Minimized Differential Signal-RX (TMDS-RX) 24, which converts (24 / 48-bit) the signal input from the Scaler 29 to be processed, and AV (CVBS / S-VHS) Or a video decoder 26 for converting signals (YUV, YC, TV-Video) output to the TV tuner 25 into signals (8/16 bits) which can be processed by the scaler 29, and A first switching block 27 for switching the signal output from the video decoder 26 and simultaneously outputting to the RGB converter IC 28 and the scaler 29 or outputting only to the scaler 29, and the ADC 23 and TMDS. -RX (24), first switching block A scaler 29 for scaling the output signal of the video decoder 26 output by switching of the lock 27 to a resolution suitable for the liquid crystal display (LCD) module 33, and a signal output from the scaler 29 TMDS-TX / LVDS (Low Voltage Differential Signal) 32 converting to suit the LCD module 33, a microcomputer 30 for controlling blocks related to the signal processing, and an AV to the microcomputer 30 And a user interface 31 for inputting a selection signal for controlling the output of the signal.

Referring to the operation of the AV signal output control apparatus of the monitor according to the present invention as follows.

First, when using the D-Sub connector 21 in the monitor or watch only AV is as follows.

The second switching block 34 controlled by the microcomputer 30 when the user connects to and monitors the signals R, G, B, H, and V coming from the computer using the D-sub connector 21. ), The signal from the RGB converter IC 28 converting the AV signal to the RGB signal and the signal from the D-sub connector 21 are switched to output only the signal from the computer to the ADC 23 to output the scaler 29. Use input method using.

In addition, when viewing signals from AV (CVBS / S-VHS) or TV tuners (YUV, YC, YV-Video) using a monitor, the input signal from the external AV jack is processed by the video decoder 26 to display the microcomputer (30). In the first switching block 27, which is controlled by the < RTI ID = 0.0 > 1, < / RTI >

Here, the external AV jack means the D-sub connector 21, the DVI 22, the CVBS, the S-VHS, and the TV tuner 25.

Second, when outputting the AV input to the D-sub connector 21 is as follows.

When an AV signal (YUV, YC, TV-Tuner) is input through an external AV jack, the video decoder 26 converts the signal into a signal (8/16 bit) that the scaler 29 can process and the microcomputer 30 In the first switching block 27 controlled by the control unit, the output is output only to the D-sub connector 21 or output to the scaler 29 according to the user's selection so that the display using two monitors can be simultaneously performed.

When sending the output to the scaler 29, the PIP (Picture In Picture) function can be used.

When the AV signal is sent only to the D-sub connector 21, the DVI signal is processed and displayed on the monitor, and the input AV signal is processed on the monitor and connected to another monitor that does not include the AV function.

The AV signal output control apparatus of the monitor according to the present invention converts the digital signal produced by the video decoder 26 to the RGB signal from the video card of the computer by the RGB converter IC 28 via the first switching block 27. Another AV through a monitor (especially a product without a TV function) that can be output using the D-sub connector 21 and receive an input of another monitor without the AV function or the D-sub connector 21. Enable operation as a monitor.

The AV signal output control apparatus of the monitor according to the present invention has the following effects.

The present invention makes it possible to connect an AV function implemented in one AV LCD monitor to another monitor or projector that does not support the AV function, and to watch AV on a larger screen or another monitor.

This has the effect of increasing the convenience of the user and the applicability of the product.

Claims (6)

In the device for controlling the output of the AV signal, External jacks for inputting an AV signal; A video decoder for processing an AV signal input through the external jacks; A first switching block for selectively switching output of the output of the video decoder; A scaler for scaling the output signal of the switched video decoder to a resolution suitable for the LCD module; An RGB converter IC for converting an output signal of the switched video decoder to an RGB signal; And a second switching block for outputting the RGB signal to another monitor through a D-sub connector which is one of external jacks. The apparatus of claim 1, further comprising TMDS-RX means for processing a signal input through DVI and outputting it to a scaler, and TMDS-TX / LVDS means for converting a signal output from the scaler and outputting the signal to the LCD module. AV signal output control device of the monitor. According to claim 1, When the signal (R, G, B, H, V) input by using the D-sub connector is connected to the monitor to watch the signal from the RGB converter IC in the second switching block and D- A device for controlling an AV signal output of a monitor, by switching a signal coming from a sub connector and digitally converting only a signal coming from a computer. The video decoder of claim 1, wherein an input signal from an external AV jack is sent to a video decoder when viewing a signal from an AV (CVBS / S-VHS) or a TV tuner (YUV, YC, YV-Video) using a corresponding monitor. The AV signal output control apparatus of the monitor characterized by processing and outputting only to a scaler in a 1st switching block. According to claim 1, When the AV input is output using the D-sub connector, the AV signal (YUV, YC, TV-Tuner) through the external AV jack to the D-sub according to the user's selection in the first switching block An AV signal output control device for a monitor, characterized in that the output is output only to the connector or output to the scaler and displayed using two monitors at the same time. 6. The apparatus of claim 5, wherein the DVI signal is processed by the corresponding monitor and displayed when the AV signal is sent only to the D-sub connector.