KR200172660Y1 - Display apparatus and digital data processing apparatus using the same - Google Patents

Abstract

Display monitor of the present invention is disclosed by receiving the display information by the digital communication method from the host to display. The transmitting unit of the digital data processing apparatus provides the display information as serial digital data to the display apparatus. The receiving section of the display monitor restores the serial digital display information to the original data. In particular, the CRT monitor internally converts and displays a digital video signal into an analog video signal. Since the CRT, monitor, or LCD monitor according to the present invention is provided with digital data, display information does not cause distortion of the signal due to the transmission of the analog video signal, unlike a monitor that receives a signal after the correction of conventional analog video. Do not.

Description

DISPLAY MONITOR OF DIGITAL DATA PROCESSING APPARATUS

The present invention relates to a display monitor, specifically, a display monitor such as a CRT monitor (Cathode Ray Tub Monitor) or an LCD monitor (Liquid Crystal Display Monitor) used in a digital data processing device. It is about.

Background Art Conventionally, digital data processing devices such as personal computer systems have generally used display monitors using Cathode Ray Tubs (CRTs) as display monitors. Recently, due to the development of display-related technology, flat panel display monitors such as liquid crystal displays and plasma displays have been used as display monitors of computer systems.

In general, a CRT display monitor or a flat panel display monitor receives and displays display information including analog video signals and synchronous signals from a host such as a system unit of a personal computer system. have. In particular, in the case of a flat panel display monitor, the display information in the form of analog is received and converted into a digital signal for internal display.

1 is a block diagram schematically showing a circuit configuration of a conventional CRT monitor. As shown in FIG. 1, the conventional CRT monitor is largely configured to include an amplifier 210, a deflection signal generator 220, a high voltage generator 230, and a CRT 240. The CRT monitor having such a configuration receives analog R (Red), G (Green), B (Blue) video signals 102 and synchronization signals 104 from the host 100. The input analog video signal 102 is amplified by the amplifier 210, and the amplified video signal 212 is provided to the CRT 240. The synchronization signal 104 is provided to the deflection signal generator 220 to provide a deflection signal 222 corresponding to the CRT 240. The high pressure generator 230 generates the high pressure signal 232 necessary for the CRT 240 under the control of the deflection signal generator 220 and provides the generated high pressure signal 232 to the CRT 240.

However, the conventional CRT display apparatus as described above is provided with display information in an analog manner from the host 100, so that the transmission distance is very limited. And the frequency band of the analog signal to be transmitted is limited according to the characteristics of the transmission path. It is difficult to recover the distortion of the signal generated by the transmission of the analog signal, and thus it is difficult to improve the image quality. In particular, the CRT monitor may not display the entire screen of the CRT monitor when a video signal having a lower resolution than the resolution supported by the CRT monitor is input.

The configuration and operation of a general LCD monitor will now be described as an example of a flat panel display device.

2 is a block diagram schematically showing the circuit configuration of a conventional LCD monitor. As shown in FIG. 2, a conventional LCD monitor includes an analog-to-digital converter (ADC) 310, a phase locked loop (PLL) circuit 320, and a video data converter 330. ), An LCD driver (LCD driver) 340, and an LCD panel 350.

The ADC 310 converts the analog R, G, and B video signals 102 provided from the host 100 into digital video data 312 and outputs the digital video data 312. The PLL circuit 320 inputs the synchronization signal 104 from the host 100 to generate an internal clock signal 322. The video data converter 330 inputs the digital video data 312 and the clock signal 322 to perform a video data conversion operation. This data conversion operation determines the number of dots and lines of video data suitable for the LCD monitor when the resolution of the analog video signal provided from the host 100 and the resolution supported by the LCD monitor are different. To convert. The digital video data output from the video data converter 330 is provided to the LCD driver 340, and the LCD driver 340 drives the LCD panel 350 to display an image.

However, the conventional flat panel display device as described above has some problems as follows. First, by providing an analog video signal, the host must use an ADC circuit to convert the signal into a digital video signal after analog video flow correction. However, this ADC needs to be able to sample at least twice the frequency of the input analog video signal's band, and therefore, a high speed ADC is required.

In addition, in the case of a PLL circuit that generates an internal clock signal, a high precision PLL circuit having a wide locking range is required. Therefore, the overall cost of the flat panel display device increases. In addition, signal loss and jittering easily occur during the analog-to-digital conversion process, which causes a problem in stable analog-to-digital conversion, and has a problem in that a range of frequencies that can be input by the ADC and the PLL circuit is limited. .

As such, since the CRT monitor or the LCD monitor receives the analog video signal from the host, distortion of the original video signal may occur. As is well known, the distortion of such a video signal may degrade the picture quality or change the color.

Accordingly, an object of the present invention is to solve the above-mentioned problems and to provide a digital data processing apparatus for providing display information to a display monitor digitally, and a display monitor for receiving and displaying the digital display information. It is.

1 is a block diagram schematically showing a circuit configuration of a conventional CRT monitor.

2 is a block diagram schematically showing the circuit configuration of a conventional LCD monitor.

3 is a block diagram showing a circuit configuration of a CRT monitor according to a first embodiment of the present invention; And,

4 is a block diagram showing a circuit configuration of an LCD monitor according to a second embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

100, 400: host 210: amplification unit

220: deflection signal generator 230: high pressure generator

240: CRT 310: ADC

320: PLL circuit 330: video format converter

340: LCD driver 350: LCD panel

410: transmitter 510: receiver

530: RAMDAC 540: synchronization signal generator

According to a feature of the present invention for achieving the object of the present invention as described above, the display monitor of the digital data processing apparatus for outputting the display information including the video data to the outside in a serial digital communication method comprising: screen display means; Receiving means for receiving display information including video data from a transmitter of the digital data processing apparatus in a serial digital communication manner and restoring the parallel video data and the synchronous data; And a monitor circuit which receives the parallel video data restored by the receiving means and the synchronous data and provides a video signal suitable for the screen display means to the screen display means.

In this embodiment, the screen display means is a CRT (Cathode Ray Tube), and the monitor circuit receives the reconstructed video data and the synchronous data from the receiving means, and the input of the video data is performed based on the synchronous data. Video data conversion means for judging the resolution and converting the number of lines and dots of the video data to suit the resolution of the monitor itself if different from the resolution supported by the monitor itself; Digital-to-analog conversion means for converting digital video data output from the video data conversion means into an analog video signal; Synchronizing signal generating means for generating a synchronizing signal suitable for the display monitor based on the synchronizing data input from the receiving means; Amplifying means for amplifying an analog video signal provided from said digital-analog converting means and outputting it to said CRT; Deflection signal generation means for receiving a synchronization signal provided by said synchronization signal generation means and outputting a deflection signal to said CRT; And high pressure generating means for generating a high pressure required for the CRT under the control of the deflection signal generating means.

In this embodiment, the screen display means is an LCD panel (Liquid Crystal Display Panel), and the monitor circuit: receives the reconstructed video data and the synchronization data from the receiving means, and is input based on the synchronization data. Video data conversion means for determining the resolution of the video data and converting the number of lines and dots of the video data to suit the resolution of the monitor itself if different from the resolution supported by the monitor itself; And an LCD driver for providing digital video data output from the video data converting means to the LCD panel.

According to the present invention as described above, the transmitting unit of the digital data processing apparatus provides the display information to the display monitor as serial digital data. The display information is received by the receiving unit provided in the display apparatus and restored to the original data. In the case of a CRT monitor, the received digital video data is internally converted into an analog video signal and displayed. If the resolution of the input video signal is different from the resolution supported by the display monitor, the display monitor converts the video signal according to its resolution and displays it.

EXAMPLE

Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described in detail.

3 is a block diagram showing a circuit configuration of a CRT monitor according to a first embodiment of the present invention, and FIG. 4 is a block diagram showing a circuit configuration of an LCD monitor according to a second embodiment of the present invention. In the components shown in FIGS. 3 to 4, the same reference numerals are given to the components shown in FIGS. 1 to 2 and the components having the same functions and operations.

Hereinafter, the detailed description of the embodiment will be described with reference to FIG. 3 and the CRT monitor according to the first embodiment of the present invention, followed by the second embodiment of the present invention with reference to FIG. In the case of the first and second embodiments, the host 400 of the digital data processing apparatus of the present invention includes a transmitter 410 for providing display information to the display monitor by serial digital communication. The serial communication scheme may be, for example, IEEE1394.

Example 1

As shown in FIG. 3, the novel CRT monitor of the present invention is largely comprised of a receiver 510 and a monitor circuit as a video data converter 520, a RAMDAC 530, a synchronization signal generator 540, and an amplifier ( 210, a deflection signal generator 220, and a high pressure generator 230.

The receiver 510 receives serial display information 412 transmitted from the transmitter 410 of the host 400 and restores the parallel video data and the synchronization data. The video data converter 520 is provided with data 512 including reconstructed parallel R, G, and B video data and a dot clock that is synchronous data, and the video data converter 520 is provided with video data. If conversion is required, the video data is converted to the resolution supported by this CRT monitor. That is, the number of dots and lines of the video data are converted to be suitable for the resolution supported by the CRT monitor. The RAMDAC 530 converts the video data 522 to the RAMDAC 530. The RAMDAC 530 converts the video data into an analog R, G, and B video signals 532 and provides the converted video data to the amplifier 210. Here, the synchronization signal generator 540 receives the synchronization data 424 for horizontal / vertical synchronization from the receiver 510 and generates a synchronization signal 542 corresponding thereto to provide the deflection signal generator 220. .

The amplifier 210 amplifies the analog video signal 532 inputted from the RAMDAC 530 and outputs it to the CRT 240. The deflection signal generator 220 generates a corresponding deflection signal 222 to generate a CRT ( 240). The high pressure generator 230 generates a high pressure signal 232 necessary for the CRT 240 under the control of the deflection signal generator 220 and provides the generated high voltage signal 232 to the CRT 240.

As described above, the host 400 provides the display information as serial digital data to the CRT monitor, and the CRT monitor receiving the display information converts the analog signal into an analog signal suitable for the CRT 240 and displays it. Since the display information is transmitted digitally between the host and the CRT monitor, the distortion of the original video signal due to the transmission of the analog video signal as in the prior art is not generated.

Example 2

Subsequently, a second embodiment of the present invention will be described in detail with reference to FIG. 4.

As shown in FIG. 4, the novel LCD monitor of the present invention includes a receiver 510 and a video data converter 520, an LCD driver 340, and an LCD panel 350 as a monitor circuit.

The receiver 510 performs the same operations as the receiver of the first embodiment. That is, the digital display information 412 transmitted from the transmitter 410 of the host 400 is received, restored to original data, and the R, G, and B video data and the dot clock are transmitted to the video data converter 520. Data 512, including a clock).

When video data conversion is required, the video data converter 520 converts the video data to fit the resolution supported by the LCD monitor. That is, the number of dots and lines of video data is converted and provided to the LCD driver 340 according to the resolution supported by the LCD monitor, and the LCD driver 340 drives the LCD panel 350 accordingly, thereby providing an LCD panel ( The image is displayed at 350.

As described above, since the host provides the display information as serial digital data to the LCD monitor, the distortion of the original video signal due to the transmission of the analog video signal as in the prior art is not generated.

In the above, the configuration and operation of the circuit according to the present invention is shown in accordance with the above description and drawings, but this is merely an example, and various changes and modifications are possible without departing from the technical spirit of the present invention. .

According to the present invention as described above, since an analog display device such as a CRT monitor or a flat panel display device such as an LCD monitor is provided with display information as digital data, signal distortion may occur due to a conventional analog transmission method. The problem can be solved. Therefore, more vivid, undistorted colors can be achieved. In addition, in the case of a flat panel display device, since the display information is provided as digital data, it is not necessary to provide a separate ADC, thereby solving the problem of the conventional ADC configuration.

Claims (3)

A display monitor of a digital data processing apparatus for outputting display information including video data to the outside in a serial digital communication system; Screen display means; Receiving means for receiving display information including video data from a transmitter 410 of the digital data processing apparatus in a serial digital communication manner and restoring parallel video data and synchronization data; And a monitor circuit which receives the parallel video data restored by the receiving means and the synchronization data and provides a video signal suitable for the lower surface display means to the screen display means. The method of claim 1, The screen display means is a CRT (Cathode Ray Tube) 240, The monitor circuit is: The reconstructed video data and the synchronization data are received from the receiving means, and the resolution of the input video data is determined based on the synchronization data, and if the resolution is different from the resolution supported by the monitor itself, the video data is appropriate for the resolution of the monitor itself. Video data converting means (520) for converting the number of lines and the number of dots of the apparatus; Digital-to-analog conversion means (530) for converting digital video data output from the video data conversion means into an analog video signal; Synchronizing signal generating means (540) for generating a synchronizing signal suitable for the display monitor based on the synchronizing data input from the receiving means; Amplifying means (210) for amplifying the analog video signal provided from the digital-to-analog converting means (530) and outputting it to the CRT (240); Deflection signal generation means (220) for receiving a synchronization signal provided by said synchronization signal generation means (540) and outputting a deflection signal to said CRT (240); And a high pressure generating means (230) for generating a high pressure required for the CRT (240) under the control of the deflection signal generating means (220). According to claim 1, The screen display means is an LCD panel (Liquid Crystal Display panel) 350, The monitor circuit is: The reconstructed video data and the synchronization data are received from the receiving means, and the resolution of the input video data is determined based on the synchronization data. Video data converting means (520) for converting the number of lines and the number of dots of the apparatus; And an LCD driver (350) for providing digital video data output from the video data converting means to the LCD panel (350).