JP2003195846A - Display device, signal processor, and video display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device which can display a proper picture even when a signal processing part or display part is changed as a video display whose signal processing part and display part can be separated. <P>SOLUTION: A display part 3 is provided with a memory 24, which stores display correction data for correcting an input video signal according to characteristics of the display part 3. Then the signal processor part when deciding that the display part 3 is changed corrects the input video signal by using the display correction data stored in the memory 24 of the display part 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, a signal processing device, and a video display device, and is particularly suitable for application to a video display device which can be separated into a signal processing device portion and a display device portion. Is.

[0002]

2. Description of the Related Art In recent years, image display devices such as liquid crystal displays and plasma displays are required to have various signal input interfaces and to be downsized and slimmed down. Therefore, in the video display device, the signal processing unit and the display unit of the video display device are separately configured, and then the signal input interface is provided in the signal processing unit, and the signal processing unit and the display unit are provided as one unit. There is a simple display part that is connected by a cable.

[0003]

By the way, in order to properly display an image in a normal image display device, the gamma characteristic, which is the electro-optical conversion characteristic of the display, is corrected correctly, and in order to obtain white balance, RGB It is necessary to correct the color temperature of each image data. In addition, AD that digitally converts the input video signal into video data
It is also necessary to make corrections to absorb variations around the converter. For example, when the display unit is composed of a liquid crystal display, the gamma characteristic and the color temperature are different for each liquid crystal panel constituting the liquid crystal display, and therefore these corrections depend on the characteristics of the liquid crystal panel. For this reason, in many video display devices, various correction data are created and stored in a memory during manufacturing so that an appropriate image is displayed on the display unit. For example, in the video display device including the signal processing unit and the display unit as described above, after the video display device is configured by combining the signal processing unit and the display unit, various correction data obtained for each video display device are displayed. All are stored in a memory provided inside the signal processing unit.

However, most of the video display devices having the signal processing section and the display section as described above can be detached from the cable, and the signal processing section and the display section can be separated. For this reason. For example, when the user has a plurality of video display devices of the same type, the display unit and the signal processing unit may be used in a combination different from the combination at the time of purchase. In this case, there is a problem that the correction data stored in the memory of the signal processing unit does not match the characteristics of the display unit, and it becomes impossible to display a proper image on the display unit.

Further, when the display unit is lost or has to be changed to another one due to a failure, even when the signal processing unit or the display unit prepared as a repair part is used, The correction data stored in the memory and the characteristics of the display unit do not match, and it becomes impossible to display an appropriate image on the display unit.

In other words, the conventional video display device including the signal processing section and the display section has a problem that proper video display cannot be performed if the combination of the signal processing section and the display section is used in combination. .

Therefore, the present invention has been made in view of the above problems, and in a video display device in which a signal processing unit and a display unit can be separated, it is appropriate to replace the signal processing unit or the display unit. It is an object of the present invention to provide a video display device capable of displaying various video images.

[0008]

In order to achieve the above object, the display device of the present invention is used by being connected to a signal processing device which performs necessary signal processing and outputs as video data, and is input from the signal processing device. And a storage means for storing display correction data for correcting the input video signal in accordance with the characteristics of the display means by the signal processing device. .

Further, the signal processing device of the present invention is used by being connected to a display device for displaying an image based on image data, and a signal processing means for performing required signal processing on an input image signal, and characteristics of the signal processing means. Storage means for storing signal processing correction data for correcting the input video signal in accordance with, and signal processing correction data stored in the storage means,
The control means controls the signal processing means to perform required signal processing based on the display correction data input from the display device.

Further, the video display device of the present invention is based on a signal processing device section having a signal processing means for subjecting an input video signal to a required signal processing and an input data inputted from the signal processing means. And a display unit configured to have display means for displaying an image. The display device section includes first storage means for storing display correction data for correcting the input video signal according to the characteristic of the display means, and the signal processing device section determines the characteristic of the signal processing means. Correspondingly, the second storage means for storing the signal processing correction data for correcting the input video signal, and the required signal processing by the signal processing means based on the display correction data and the signal processing correction data. The control means for controlling is provided.

According to the present invention, the display unit is provided with the first storage means, and the first storage means stores the display correction data for correcting the input video signal according to the characteristics of the display means. I will leave it. Then, the control means of the signal processing device section uses the display correction data stored in the first storage means to control the signal processing means to perform the required signal processing, thereby performing the signal processing. Even if the display device unit connected to the device unit is changed, it is possible to display an appropriate image on the display device unit.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION A video display device according to an embodiment of the present invention will be described below. FIG. 1 is a diagram showing an external configuration of a video display device according to the present embodiment. In the video display device 1 shown in FIG. 1, the signal processing device unit 2 and the display device unit 3 are separately configured, and the signal processing device unit 2 and the display device unit 3 are connected by a cable 4. ing.

The signal processing device section 2 is provided with various signal input interfaces for allowing input of various video signals such as analog video signals and digital video signals.

The display unit 3 includes a liquid crystal panel (hereinafter, referred to as "L") in which pixels for displaying an image are arranged in a matrix.
"CD (Liquid Crystal Display) panel"
22 is provided, and video display is performed based on the image data sent via the cable 4.
The cable 4 is a cable that connects the signal processing unit 2 and the display unit 3. The cable 4 can be detached so that the signal processing device unit 2 and the display device unit 3 can be easily moved and replaced.

The signal processing device section 2 does not necessarily have to be configured as a single unit, and for example, various broadcast receiving devices as video sources, various media reproducing devices, home game machines, CATV terminal devices, personal computers, Alternatively, it may be incorporated into the inside of these combined devices. Further, the display device unit 3 is not limited to the liquid crystal display,
For example, a plasma display or the like may be used.

FIG. 2 is a diagram showing a configuration of main video processing blocks of the video display device 1 shown in FIG. The signal processing device unit 2 shown in FIG. 2 has, for example, an AD converter (hereinafter, referred to as “A
11 and a TMDS receiver 12 are shown. The ADC 11 converts the input analog video signal into digital video data and outputs the digital video data to the scan converter 13. Further, the TMDS receiving unit 12 uses the TM
DS standard (Transmission Minimized Differential Sign
The digital image signal of the aling standard) is received and output to the scan converter 13. It should be noted that the input interface shown here is merely an example, and it is naturally possible to provide another input interface.

The scan converter 13 performs a scaling process on the video signal input from the ADC 11 or the TMDS receiving unit 12 in accordance with the resolution of the LCD panel 22 of the display device unit 3 and gammas the input video data. Color temperature correction and the like are performed in order to perform correction and white balance adjustment.

FIG. 3 shows an example of the internal configuration of the scan converter 13. The scan converter 13 shown in FIG.
Is composed of an image memory 31, a brightness / contrast adjustment unit 32, a gamma correction unit 33, and a scaling unit 34.

The image memory 31 is, for example, an SDRAM (Sy
nchronous Dynamic Random Access Memory) and the like, and the write and read timings are controlled by the main microcomputer 14 or a memory controller (not shown) controlled by the main microcomputer 14. For example, the ADC 11 or TM
The video data from the DS receiver 12 is RG for each frame.
The image data of B is converted and output.

Brightness / contrast adjusting section 32
Corrects the image data input from the image memory 31 on the basis of the correction data input via the main microcomputer 14 to adjust the black level and the contrast, and the R, G, B The color temperature of the image data is corrected to adjust the white balance.

The gamma correction unit 33 includes the main microcomputer 14
The gamma correction is performed on the image data input from the brightness / contrast adjustment unit 32 based on the correction data input via the.

The scaling unit 34 includes a gamma correction unit 33.
The image data input from is subjected to scaling processing so as to be image data corresponding to the resolution of the display unit 3, and is output. For example, the aspect ratio of the image is converted into appropriate frame image data by performing thinning processing or interpolation processing, and the frame image data is output.

When the video data input to the scan converter 13 is interlaced video data, the image data in field units is converted into image data in frame units before the scan converter 13 although not shown. That is, a so-called interlace-progressive conversion unit (IP conversion unit) is provided, and the scan converter 13 receives the image data progressively converted by the IP conversion unit.

The control of the scan converter 13 as described above is performed by the main microcomputer 14 shown in FIG. The main microcomputer 14 is composed of, for example, a microcomputer, and controls the scan converter 13 and the memory 15 as a whole of the video display device 1. The memory 15 is, for example, NV-RAM (Non-Volatile Memor).
It is a non-volatile memory such as y) and stores various correction data (display correction data) necessary for gamma correction and white balance adjustment performed in the scan converter 13. Further, correction data (signal processing correction data) for absorbing variations around the ADC 11 are also stored.

These correction data are used for the signal processing device section 2 and the display device section 3 when the video display device 1 is manufactured.
Are obtained when the adjustment is performed in combination, and at least the gamma correction data, the color temperature correction data, and the like are different for each characteristic of the LCD panel 22 of the display unit 3.

Further, in the present embodiment, the memory 15 stores unique identification data (ID) for identifying the display unit 3 to be combined with the signal processing unit 2. The identification data for identifying the display device unit 3 may be, for example, the serial number of the display device unit 3. That is, the identification data of the display device section 3 to be connected at the time of manufacturing is stored in the memory 15 in advance.

The image data output from the scan converter 13 is supplied to the LCD driver 21 of the display unit 3 via the image transmission line 16 of the cable 4. LC
The D driver 21 controls the drive of the LCD panel 22 based on the image data of the scan converter 13.

The sub-microcomputer 23 provided in the display unit 3 is also composed of, for example, a microcomputer, and is connected to the main microcomputer 14 of the signal processing unit 2 by the communication line 17 of the cable 4. In this case, the sub-microcomputer 23 receives a control signal transmitted from the main microcomputer 14 via the communication line 17, or an operation signal (not shown) provided in the display device section 3 or an operation signal from a remote commander. Based on this, various controls on the display device section 3 side are performed. LC
When the D panel 22 is turned on / off or when the display device section 3 is provided with a voice output means such as a speaker, the volume control of the voice output means is performed. The sub-microcomputer 23 of the display device section 3 is not necessarily provided, and it is of course possible that the main microcomputer 14 of the signal processing device section 2 directly performs various controls of the display device section 3.

The cable 4 connecting the signal processing unit 2 and the display unit 3 is, for example, a cable for digital video transmission, and the image transmission line 16 and the communication line 17 are formed by one cable.

In the present embodiment, the display unit 3 is also provided with the memory 24. The memory 24 is also composed of a non-volatile memory such as NV-RAM (Non-Volatile Memory). In this case, the memory 24 is managed by the sub-microcomputer 23. It should be noted that the main microcomputer 14 manages the memory 24 not only when the display device unit 3 is not provided with the sub-microcomputer 23, but also when the display device unit 3 is provided with the sub-microcomputer 23. Is also good.

The memory 24 has a scan converter 13
Correction data such as gamma correction and color temperature correction in which the correction data is determined according to the characteristics of the display device unit 3 side, that is, display correction data different for each display device unit 3, Identification data (ID) for identifying the device unit 3 is stored. That is, in the present embodiment, the display device unit 3 is also provided with the memory 24, and among the various data stored in the memory 15 of the signal processing device unit 2, the display correction data different for each display device unit 3 and the display correction data are displayed. Identification data for identifying the device unit 3 is also stored in the memory 24 of the display unit 3.

In the image display device of this embodiment, the combination of the signal processing device portion 2 and the display device portion 3 is determined in advance at a predetermined timing such as when the display device portion 3 is activated. It is determined whether or not there is a combination. When the combination of the signal processing unit 2 and the display unit 3 is a predetermined combination, the correction data stored in the memory 15 of the signal processing unit 2 is output to the scan converter 13. .

On the other hand, when the combination of the signal processing unit 2 and the display unit 3 is not a predetermined combination, the display correction data of the display unit 3 is read from the memory 24 of the display unit 3, and The display correction data read from the memory 24 is output to the scan converter 13.

As a result, even when the combination of the signal processing unit 2 and the display unit 3 is changed, the signal processing unit 2 can perform correction according to the characteristics of the display unit 3, and thus the display unit. It becomes possible to display a proper image on the display 3.

When the display correction data is read from the memory 24 of the display unit 3, the display correction data read from the memory 24 and the identification data of the display unit 3 are written in the memory 15 of the signal processing unit 2. The identification data and the display correction data in the memory 15 are updated. With this configuration, even if the video display device is configured with the changed new combination, the signal processing device unit is not required to read the display correction data from the memory 24 of the display device unit 3 at each startup. Since it suffices to read the display correction data together with the signal processing correction data from the second memory 15, the image display can be started in a short start-up time.

In order to realize the operation described above,
The processing executed by the main microcomputer 14 will be described with reference to the flowchart shown in FIG. In addition, the process shown below
It is assumed that this is performed when the display device unit 3 is activated.

First, the main microcomputer 14 executes step S
In 101, the identification data for identifying the display device unit 3 is read from the memory 15 on the signal processing device unit 2 side and the memory 24 on the signal processing device unit 2 side, and the subsequent step S10.
In step 2, it is determined whether or not the identification data read from the memories 15 and 24 match each other. Here, if a positive result is obtained, it is determined that the combination of the signal processing device unit 2 and the display device unit 3 has not been changed, the process proceeds to step S103, and step S103.
In, the display correction data is read from the memory 15 of the signal processing unit 2. And the following step S
The display correction data read out from the memory 15 in 104 is set in the scan converter 13, and the process ends.

On the other hand, when a negative result is obtained in step S102, it is determined that the combination of the signal processing device section 2 and the display device section 3 is changed, and the process proceeds to step S105. In step S105, the memory of the display device section 3 is changed. The display correction data is read from 24. Then, in step S106, the identification data of the display device unit 3 read in step S101 and the display correction data read from the memory 24 in step S105 are written in the memory 15 of the signal processing device unit 2, and then the memory is stored in step S105. The display correction data read from 24 is set in the scan converter 13, and the process ends.

Even if the combination of the display device unit 3 is changed, the ADC stored in the signal processing device unit 2 is changed.
Since it is not necessary to change the signal processing correction data for absorbing the variation around 11, the signal processing correction data of the ADC 11 is read from the memory 15 from the memory 15 regardless of the determination result in step S102 when performing the above processing. It is read out and set in the scan converter 13.

By doing so, even when the combination of the signal processing device section 2 and the display device section 3 is changed, the signal processing device section 2 makes a correction according to the variation of the LCD panel 22 of the display device section 3. Will be able to. Therefore, for example, when the user has a plurality of sets of video display devices of the same type and uses the display device unit 3 and the signal processing device unit 2 in a combination different from the combination at the time of purchase, or when the display device unit 3 is lost. Even if it is replaced with another due to a malfunction or a failure, or when the repair parts of the signal processing unit 2 or the display unit 3 are used, the color temperature of the display unit 3 is different from the actual color temperature. An appropriate image can be displayed on the display device section 3 without causing any trouble.

When the combination of the signal processing unit 2 and the display unit 3 is changed, the memory 24 of the display unit 3 is changed.
Since the display correction data and the identification data read from the memory are written in the memory 15 of the signal processing unit 2, the memory 24 of the display unit 3 can be used even if the image display device is configured with a new combination thereafter. Since it is not necessary to read the display correction data from, the startup time can be shortened.

In this embodiment, the display correction data of the display unit 3 is also stored in the memory 15 of the signal processing unit 2, but this is merely an example, and at least the display unit. 3 is provided with a memory 24, and if the display correction data of the display device section 3 is stored in this memory 24, the video display device according to the present invention can be configured. That is, if the main microcomputer 14 of the signal processing device unit 2 reads the display correction data of the display device unit 3 from the memory 24 of the display device unit 3 and outputs it to the scan converter 13 at every start-up, the signal is transmitted to the display device unit 3. Even when the combination with the processing device unit 2 is changed, an appropriate image can be displayed on the display device unit 3.

Further, the liquid crystal display has been described as an example of the video display device, but this is merely an example, and the present invention is not limited to the video display device provided with the liquid crystal display, and the input video signal The present invention can be applied to any video display device as long as it is a video display device capable of separating the signal processing unit that performs signal processing and the display unit.

Furthermore, in the present embodiment, an example in which the cable 4 is used to connect the signal processing device unit 2 and the display device unit 3 is shown, but the signal processing device unit 2 and the display device unit 3 are connected to each other. Various connection forms other than the cable can be considered. For example, the display device unit 3 may be directly attached to the signal processing device unit 2, or a connection form in which the signal processing device unit 2 and the display device unit 3 are connected by using wireless communication is possible.

[0045]

As described above, the video display device of the present invention is provided with the first storage means in the display device section, and the first storage means is provided.
The storage means stores the display correction data for correcting the input video signal according to the characteristics of the display means. Then, the signal processing device unit is connected to the signal processing device unit by using the display correction data stored in the first storage unit to control the signal processing unit to perform required signal processing. Even if the display device unit is changed, the signal processing unit can perform correction according to the characteristics of the display device unit, so that an appropriate image can be displayed on the display device unit.

Further, the first storage means stores identification data for identifying the display device section, and the second storage means stores identification data and display correction data of the display apparatus section to be connected. If the signal processing is performed using the display correction data stored in the first storage unit of the display device unit only when the identification data of the signal processing unit unit and the identification data of the display unit unit do not match, If the combination of the signal processing unit and the display unit is not changed, it is possible to start up in almost the same start-up time as the conventional one.

Further, when the identification data of the signal processing unit and the identification data of the display unit do not match, the identification data and the display correction data stored in the second storage unit are stored in the first storage unit. By updating the identification data and the display correction data, even when the combination of the signal processing device unit and the display device unit is changed, it is possible to start up in almost the same start-up time as the conventional one.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a video display device as an embodiment of the present invention.

FIG. 2 is a block diagram of a video display device according to the present embodiment.

FIG. 3 is a diagram showing an internal configuration of a scan converter.

FIG. 4 is a flowchart showing a process executed by a main microcomputer.

[Explanation of Codes] 1 video display device, 2 signal processing device part, 3 display device part, 4 cable, 12 TMDS receiving part, 13 scan converter, 14 main microcomputer, 15 24
Memory, 16 image transmission lines, 17 communication lines, 2
1 LCD driver, 22 LCD panel, 23 sub-microcomputer, 31 image memory, 32 brightness / contrast adjustment unit, 33 gamma correction unit, 34 scaling unit

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) G09G 3/20 650 G09G 3/20 650B 5G435 650C 650E 3/36 3/36 5/10 Z 5/10 H04N 5/66 A 5/36 G09G 5/00 555D 5/391 555G H04N 5/66 520V 5/36 520E (72) Inventor Anori Mori 6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo F at Sony Corporation Terms (Reference) 2H093 NA11 NC15 NC26 NC59 ND50 5C006 AF13 AF46 AF47 BB11 BC16 5C058 AA06 AA11 BA01 BA07 BA13 BB04 BB14 5C080 AA05 AA10 BB05 DD01 DD13 EE21 EE29 JJ02 BB29A01 BB29A01 BB02 A01BB01 A01BB01 A01BB01 A01A01 A01B01A01 BB29A01 A01BB01 BB11 BB12 CC09 CC12 LL04 LL08

Claims (11)

[Claims] 1. A display device which is used by being connected to a signal processing device for performing required signal processing and outputting as video data, and a display means for performing video display based on video data input from the signal processing device. A display device, wherein the signal processing means includes storage means for storing display correction data used when correcting the input video signal according to the characteristics of the display means. 2. The display device according to claim 1, wherein the storage means stores unique identification data for identifying the display device. 3. The video display device according to claim 1, wherein the display means comprises a display panel having pixels for image display. 4. A signal processing device for use in connection with a display device for displaying video based on video data, comprising: signal processing means for performing required signal processing on an input video signal; and characteristics of the signal processing means. According to the storage means for storing the signal processing correction data for correcting the input video signal, and the signal processing correction data stored in the storage means,
Control means for controlling the signal processing means to perform required signal processing based on display correction data for correcting the input video signal according to the characteristics of the display means input from the display device; A signal processing device comprising: 5. The storage means stores identification data for identifying a display device to be connected, and display correction data for the display device to be connected, and the control unit is When the identification data stored in the storage means and the identification data input from the display device match, the signal processing correction data and the display correction data stored in the storage means are subjected to the signal processing. When the identification data stored in the storage means and the identification data input from the display device do not match,
The image display device according to claim 4, wherein the signal processing correction data stored in the storage means and the display correction data input from the display device are output to the signal processing means. 6. The control unit, when the identification data stored in the storage unit does not match the identification data input from the display device,
The image display device according to claim 5, wherein the identification data and the display correction data stored in the storage means are updated to the identification data and the display correction data input from the display device. 7. A signal processing device section comprising a signal processing means for subjecting an input video signal to a required signal processing, and a display means for displaying an image based on input data inputted from the signal processing means. And a display device unit configured to include the display device unit, wherein the display device unit stores display correction data for correcting the input video signal according to the characteristics of the display unit. And a signal processing correction data for correcting the input video signal according to the characteristics of the signal processing means.
And a control unit that controls the signal processing unit to perform required signal processing based on the display correction data and the signal processing correction data. 8. The first storage means stores unique identification data for identifying the display device section, and the second storage means stores the predetermined display device section. Identification data and display correction data of the display device section thereof are stored, and the control section is stored in the second storage section and the identification data stored in the first storage section. When the identification data match, the display correction data and the signal processing correction data stored in the second storage means are output to the signal processing means, and the identification data in the first storage means and the first storage means are output. When the identification data of the second storage means do not match, the display correction data stored in the first storage means and the signal processing correction data stored in the second storage means are set to the signal To the processing means Video display according to claim 7, characterized in that the force. 9. The control unit, when the identification data of the first storage means and the identification data of the second storage means do not match, the identification data stored in the second storage means. And display correction data,
9. The video display device according to claim 8, wherein the video data is updated to the identification data and the display correction data stored in the first storage means. 10. The video display device according to claim 8, wherein the display means comprises a display panel having pixels for image display. 11. The image display device according to claim 8, wherein the display device unit and the signal processing device unit are connected via a cable.