JP2007324667A - Video display device, and television broadcasting receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video display device which can display even a video signal of interlace system with high resolution and high display quality. <P>SOLUTION: Each sub-pixel row L of an LCD 1 has such a structure that R pixel, G pixel and B pixel are repeated sequentially wherein the sub-pixels of vertically adjoining sub-pixel rows are arranged to be shifted by one half pitch in the column direction, and sub-pixels of the same color are arranged in the row direction. A display image of Δ shape or reverse Δ shape combining one R, G and B pixels is formed by a combination of the R pixel in an odd row and the G and B pixels in an even row in the Add mode of interlace system, and a combination of the G and B pixels in an even row and the R pixel in an odd row or a combination of the R pixel in an even row and the G and B pixels in an odd row in the Even mode. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a video display device that displays a video signal on a liquid crystal display, and more particularly to a video display device that displays an interlaced video signal, and a television broadcast receiver that includes the video display device.

At present, the interlace system is mainly used in television broadcasting such as analog broadcasting. On the other hand, liquid crystal displays that are based on the progressive method are mainly used because they have been used mainly for still images such as personal computer displays. And as such a liquid crystal display, in order to solve various problems regarding display quality, various types of pixel patterns have been proposed (see Patent Documents 1 to 3).
JP 2004-258365 A JP 2003-215636 A JP 2002-156654 A

  In the conventional liquid crystal displays as shown in Patent Documents 1 to 3, the pixel arrangement pattern is set to a specific pattern for the purpose of improving the display quality for a still image or a progressive video signal.

  However, in these conventional liquid crystal displays, when an interlaced video is displayed, the interlaced video signal must be converted into a progressive video signal. When such video signal format conversion is performed, the video quality is inevitably deteriorated.

  Accordingly, an object of the present invention is to provide a video display device capable of displaying not only a progressive format but also an interlace format video signal with a high resolution and a high display quality, and a television broadcast receiving apparatus including the video display device. To provide an apparatus.

  In the present invention, a red sub-pixel, a green sub-pixel, and a blue sub-pixel are two-dimensionally arranged in a predetermined arrangement pattern, and a plurality of display pixels can be obtained by combining one red sub-pixel, one green sub-pixel, and one blue sub-pixel. In a video display device comprising two-dimensionally arranged display means and display control means for giving received video to the display means, one display pixel constituting the display means is a subpixel adjacent to two rows. Each set of display pixels, each composed of a set of two rows of sub-pixels arranged in the row direction, each having a Δ shape or an inverted Δ shape as a set, has the same shape and a combination pattern of the same sub-pixels. When a video signal of the format is input, the sub-image is sequentially arranged so that the odd-numbered row in the row direction of the sub-pixel array pattern becomes the upper stage of the pixel in the Add mode. Drive data is supplied while scanning in the raw row direction, and in the even mode, the drive data is sequentially scanned in the row direction of the sub-pixels so that the even-numbered row in the row direction of the sub-pixel array pattern is the upper stage of the pixels. It is characterized by giving.

  In this configuration, a red sub-pixel, a green sub-pixel, and a blue sub-pixel are adjacent in a Δ shape or an inverted Δ shape to form one display pixel. The display pixels are arranged in the row direction and the column direction to constitute display means in which the display pixels spread two-dimensionally. Here, since the display images arranged in the row direction (adjacent) have the same structure, even if a combination of sub-images is configured at a position shifted by one row with respect to these display images, the red sub-image and the green sub-image are similarly formed. A combination of blue sub-images is formed. That is, display pixels are formed at a half pitch of the display image arrangement pitch in the row direction of the display pixels.

  The display control means utilizes the fact that the display pixels are set with such a half-pitch shift, and when an interlaced video signal is input, an odd-numbered row in the row direction of the sub-pixel array pattern is added as an Add mode. Drive data is given so as to be in the upper stage of the display pixel, and even rows in the row direction of the array pattern of the sub-pixels shifted by a half pitch with respect to the display pixel driven in the Add mode as the Even mode become the upper stage of the display pixel. To give drive data.

  Thereby, an interlaced video signal can be displayed without being converted to the progressive format.

  In addition, when a progressive video signal is input, the display control means of the video display device according to the present invention supplies drive data to each sub-pixel of the display pixel group arranged in the column direction while sequentially scanning in the row direction. It is characterized by.

  In this configuration, when a progressive video signal is input, drive data is given while sequentially scanning the display pixels in the row direction, so that the progressive video signal can be displayed as it is.

  Further, the sub-pixels arranged in the column direction of the display means of the video display device of the present invention are set at positions shifted by a half pitch with respect to the arrangement positions of the sub-pixels in the sub-pixel columns adjacent in the row direction. It is characterized by that.

  In this configuration, by arranging subpixels adjacent in the row direction with the subpixels shifted by a half pitch in the column direction, the display pixels arranged in the row direction have an accurate Δ shape or an inverted Δ shape. This makes the display screen uniform as a whole.

  The present invention is also provided with the above-described video display device, receiving means for receiving an interlaced television broadcast and separating it into a video signal and an audio signal, and audio processing for driving a speaker based on the audio signal. Means.

  In this configuration, when an interlaced television broadcast is received, it is separated into a video signal and an audio signal, the audio signal is emitted from the speaker via the audio processing means, and the video signal is sent to the display control means described above. It is displayed on the display means in the interlace mode. Thereby, even interlaced television broadcasting can be displayed with high quality.

  According to the present invention, even if an interlaced video signal is input, the video can be displayed without being converted to the progressive format, so that the video can be displayed with high display quality. Furthermore, even if a progressive video signal is input, it can be displayed directly, so that the video can be displayed with high display quality.

  Further, according to the present invention, an interlaced television broadcast can be displayed with high display quality.

A liquid crystal television according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing the main configuration of the liquid crystal television 7 of the present embodiment.
A liquid crystal television 7 corresponding to the television broadcast receiving apparatus of the present invention includes an LCD (liquid crystal display) 1, a control unit 2, a tuner 3, a video processing unit 4, an audio processing unit 5, and a speaker 6. In addition, the liquid crystal television 7 includes an external connection terminal and can be connected to a DVD player 8.

  The control unit 2 performs overall control of the liquid crystal television 7 and decodes control commands transmitted from a remote controller (not shown) to execute power on / off control, channel switching control, volume up / down control, and the like. To do.

  The tuner 3 extracts a broadcast signal of a selected channel from an interlaced television broadcast signal received by an antenna (not shown). The tuner 3 separates the broadcast signal of the selected channel into an audio signal and a video signal, outputs the audio signal to the audio processing unit 5, and outputs the video signal to the video processing unit 4.

  The sound processing unit 5 emits sound from the speaker 6 based on the input sound signal.

  The video processing unit 4 corresponds to the display control means of the present invention, generates drive data for the LCD 1 based on the input interlaced video signal, and supplies the drive data to the LCD 1. When a progressive video signal is input from the DVD player 8, the video processing unit 4 generates drive data based on the progressive video signal using a known method and supplies the drive data to the LCD 1.

  The LCD 1 corresponds to the display means of the present invention, and is a so-called active matrix type color liquid crystal display. As a feature of the LCD 1 of the present embodiment, red (R), green (G), and blue (B) sub-pixels are formed so as to have a pixel configuration as shown in FIGS.

FIG. 2 is a plan view showing the arrangement of the sub-pixels 10 of the LCD 1 shown in FIG.
The LCD 1 includes a group of sub-pixels (L1, L2,...) In which a plurality of sub-pixels 10 are arranged in a straight line in the column direction (the horizontal direction of the display screen). The sub pixel groups arranged in the column direction are referred to as a first sub pixel row L1, a second sub pixel row L2,. Each sub-pixel row L has an arrangement in which a red sub-pixel R (hereinafter referred to as R pixel), a green sub-pixel G (same as G pixel), and a blue sub-pixel (same as B pixel) are arranged in order.

  In adjacent subpixel rows Ln and Ln + 1, subpixels of the same color are arranged so as not to be adjacent to each other. Further, the sub-pixels 10 in adjacent sub-pixel rows are arranged in a state shifted by a half pitch with respect to the sub-pixel arrangement pitch in the column direction.

  The arrangement order of the sub-pixels in the column direction is the same in all odd rows and the same in all even rows. With these configurations, each sub-pixel column row includes sub-pixels 10 having the same color in the row direction.

  A specific example is shown in FIG. 2. In the first sub-pixel row L1 which is the uppermost row, an R pixel is arranged at the left end (the beginning of a column), and a G pixel in the right direction (the direction in which the column number advances) in order, B pixels, R pixels, G pixels, and B pixels are repeatedly arranged.

  In the second sub-pixel row L2 that is the second row from the top, G pixels are arranged at the left end, and B pixels, R pixels, G pixels, B pixels, and R pixels are repeatedly arranged in order in the right direction. At this time, the leftmost G pixel is arranged at a position shifted by a half pitch along the column direction to the left side of the uppermost leftmost R pixel, that is, to the side of the LCD 1. As a result, the sub-pixels in the first sub-pixel row L1 and the sub-pixels in the second sub-pixel row L2 are arranged in a state shifted by a half pitch in the column direction.

  The third sub-pixel row L3 in the third row from the top has the same pattern as the first sub-pixel row L1 in the column direction, and R pixels, G pixels, and B pixels are repeatedly arranged. In the fourth sub-pixel row L4, the G pixel, the B pixel, and the R pixel are repeatedly arranged in the same pattern as the second sub-pixel row L2 in the column direction. Each time the row number advances, the configuration of the first subpixel row L1 and the configuration of the second subpixel row L2 are sequentially repeated, so that the subpixels are two-dimensionally arranged.

  Thereby, when viewed along the column direction, the sub-pixels of each color are arranged in a state shifted by a half pitch. Specifically, the first G pixel column rowG1, the first R pixel column rowR1, the first B pixel column rowB1, the second G pixel column rowG2, the second R pixel column rowR2, the first B pixel column rowB2, and the subpixels of each color are shifted by a half pitch. In this state, the structure is arranged in the column direction in order.

  For the LCD 1 having such a structure, the video processing unit 4 combines R pixels, G pixels, and B pixels adjacent to each other in a Δ shape or an inverse Δ shape based on the input interlaced video signal. Drive data is provided to form display pixels.

  FIG. 3A is a diagram illustrating a display pixel pattern in the interless add mode, and FIG. 3B is a diagram illustrating a display pixel pattern in the even even mode.

  FIG. 4 is a diagram showing interlaced add mode drive data, and FIG. 5 is a diagram showing interleaved even mode drive data.

  When an interlaced video signal is input, the video processing unit 4 generates Add mode drive data and Even mode drive data, respectively.

  Then, the video processing unit 4 gives Add mode drive data when operating in the Add mode. The Add mode drive data is data that sequentially scans the sub-pixel rows using the first line data LDod1, the third line data LDod3, the fifth line data LDod5,. As a specific example, as shown in FIG. 4, the first line data LDod1 is a data column that drives each subpixel of the first subpixel row L1, and data that drives the R pixel of the first R pixel column rowR1, Data for driving G pixels in the 2G pixel column row G2, data for driving B pixels in the second B pixel column row B2, and so on. The third line data LDod3 is a data column that drives each sub pixel of the second sub pixel row L2, and drives the G pixel of the first G pixel column row G1, and drives the B pixel of the first B pixel column row B1. , Data for driving the R pixels in the second R pixel row rowR2, and so on.

  At this time, as shown in FIG. 3A, the video processing unit 4 performs the R pixel in the first R pixel column rowR1 in the first subpixel row L1 and the G in the first G pixel column rowG1 in the second subpixel row L2. The first line data LDod1 and the third line data LDod3 as shown in FIG. 4 are set so that the display pixel 111od is formed by the pixels and the B pixels in the first B pixel row rowB1. The video processing unit 4 also includes a G pixel in the second G pixel column rowG2 and a B pixel in the second B pixel column rowB2 in the first subpixel row L1, and an R pixel in the second R pixel column rowR2 in the second subpixel row L2. The drive data is set so as to form the display pixel 112od. Similarly for other sub-pixels, a set of R, G, and B pixels adjacent in the row direction is combined, and a combination of an odd-numbered R pixel and an even-numbered G pixel and B pixel, or an odd-numbered row. As shown in FIG. 4, a display pixel 1αβod (α is a row number and β is a column number) having a Δ shape or an inverse Δ shape is formed from a combination of G pixels and B pixels of R and even-row R pixels. First line data LDod1 and third line data LDod3 are set.

  On the other hand, the video processing unit 4 provides Even mode drive data during operation in the Even mode. The Even mode drive data is data that sequentially scans the sub-pixel rows using the second line data LDev2, the fourth line data LDev4, the sixth line data LDev6,. As a specific example, as shown in FIG. 5, the second line data LDev2 is a data column that drives each subpixel of the second subpixel row L2, and data that drives G pixels of the first G pixel column rowG1, This is a data string in which data for driving the B pixel in the 1B pixel line rowB1, data for driving the R pixel in the second R pixel line rowR2,. The fourth line data LDev4 is a data column that drives each sub-pixel of the third sub-pixel row L3, data that drives the R pixel of the first R pixel column rowR1, and data that drives the G pixel of the second G pixel column rowG2. , Data for driving the B pixels in the second B pixel row rowB2, and so on.

  At this time, as illustrated in FIG. 3B, the video processing unit 4 performs the G pixel in the first G pixel column row G1 and the B pixel in the first B pixel column row B1 and the third sub pixel row L3 in the second sub pixel row L2. The second line data LDev2 and the fourth line data LDev4 are set as shown in FIG. 5 so as to form the display pixel 111ev with the R pixels in the first R pixel row rowR1. The video processing unit 4 also includes an R pixel in the second R pixel column rowR2 in the second subpixel row L2, a G pixel in the second G pixel column rowG2 and a B pixel in the second B pixel column rowB2 in the third subpixel row L3. As shown in FIG. 5, the second line data LDev2 and the fourth line data LDev4 are set so as to form the display pixel 112ev. In the same manner, other R pixels, G pixels, and B pixels adjacent to each other in the row direction are combined as a set, and a combination of an even row of G pixels and B pixels and an odd row of R pixels, or an even row. As shown in FIG. 5, a display pixel 1αβev (α is a row number and β is a column number) having a Δ shape or an inverse Δ shape is formed from the combination of the R pixel and the odd-numbered G pixel and B pixel. Set the drive data.

  By performing such a configuration and processing, it is possible to display an interlaced video signal without converting to an progressive video signal as in the past. Also, instead of scanning in units of display pixels, the odd-numbered rows (Add) and even-numbered rows (Even) of the interlace method are scanned every half pitch of the display pixels, so that the interlace method of higher resolution than the conventional method is used. A video signal can be displayed. In addition, since the conversion from the interlace method to the progressive method is not performed, the video can be displayed without degrading the display quality.

  By the way, since the processing system of the video processing unit 4 and the LCD 1 is not different from the conventional one, the video processing unit 4 can input the progressive video signal by a known method when a progressive video signal is input from the DVD player 8 or the like. Drive data based on the signal is generated, and an image can be displayed on the LCD 1 while scanning in the order of display pixels.

  In the above description, the liquid crystal television has been described as an example. However, the above configuration and processing are applied to any device that displays an interlace video signal using a display device corresponding to an active matrix. Can do.

It is a block diagram which shows the main structures of the liquid crystal television 7 of this embodiment. It is a top view which shows the arrangement | sequence of the sub pixel 10 of LCD1 shown in FIG. It is a figure which shows the display pixel pattern at the time of an interless system Add mode, and a figure which shows the display pixel pattern at the time of an interlace system Even mode. It is a figure which shows the add mode drive data of an interlace system. It is a figure which shows even mode drive data of an interlace system.

Explanation of symbols

  1-LCD, 10-subpixel, 2-control unit, 3-tuner, 4-video processing unit, 5-audio processing unit, 6-speaker, 7-liquid crystal television, 8-DVD player

Claims (5)

Receiving means for receiving an interlaced television broadcast and separating it into a video signal and an audio signal;
Audio processing means for driving a speaker based on an audio signal;
A red subpixel, a green subpixel, and a blue subpixel are two-dimensionally arranged in a predetermined arrangement pattern, and a plurality of display pixels are two-dimensionally arranged by combining one red subpixel, one green subpixel, and one blue subpixel. Display means comprising:
Display control means for giving the received video to the display means;
In a television broadcast receiving apparatus comprising:
Each subpixel arranged in the column direction constituting the display means is set at a position shifted by a half pitch with respect to the arrangement position of each subpixel in the subpixel column adjacent in the row direction,
One display pixel constituting the display means is configured in a Δ shape or an inverted Δ shape with a pair of adjacent sub-pixels over two rows,
Each display pixel consisting of a set of two sub-pixels arranged in the row direction has the same shape and the same sub-pixel combination pattern,
When an interlaced video signal is input, the display control means sequentially in the row direction of the sub-pixels so that the odd-numbered row in the row direction of the sub-pixel array pattern is in the upper stage of the display pixel in the Add mode. Drive data is supplied while scanning, and in the even mode, drive data is supplied while sequentially scanning in the row direction of the sub-pixels so that the even-numbered row in the row direction of the array pattern of the sub-pixels is the upper stage of the display pixel. ,
When a progressive video signal is inputted, drive data is given to each sub-pixel of the display pixel group arranged in the column direction while sequentially scanning in the row direction. A red subpixel, a green subpixel, and a blue subpixel are two-dimensionally arranged in a predetermined arrangement pattern, and a plurality of display pixels are two-dimensionally arranged by combining one red subpixel, one green subpixel, and one blue subpixel. Display means comprising:
Display control means for giving the received video to the display means;
In a video display device comprising:
One display pixel constituting the display means is configured in a Δ shape or an inverted Δ shape with a pair of adjacent sub-pixels over two rows,
Each display pixel consisting of a set of two sub-pixels arranged in the row direction has the same shape and the same sub-pixel combination pattern,
When the interlace video signal is input to the display control means,
In the Add mode, drive data is given while sequentially scanning in the row direction of the sub-pixels so that the odd-numbered row in the row direction of the sub-pixel array pattern is the upper stage of the display pixel,
In the even mode, drive data is given while sequentially scanning in the row direction of the sub-pixels so that even-numbered rows in the row direction of the sub-pixel array pattern are in the upper stage of the display pixels.
A video display device characterized by that. The display control means receives a progressive video signal,
The video display device according to claim 2, wherein drive data is given to each sub-pixel of the display pixel group arranged in the column direction while sequentially scanning in the row direction.   4. The video according to claim 2, wherein the sub-pixels arranged in the column direction are set at positions shifted by a half pitch with respect to the arrangement positions of the sub-pixels of the sub-pixel columns adjacent in the row direction. Display device. While comprising the video display device according to any one of claims 2 to 4,
Receiving means for receiving an interlaced television broadcast and separating it into a video signal and an audio signal;
Audio processing means for driving a speaker based on an audio signal;
A television broadcast receiving apparatus comprising:

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