JP3406536B2 - Address type image display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an address type image display device for displaying images, and more particularly to an address type image display device provided with a color filter for multicolor display.

[0002]

2. Description of the Related Art As a conventional address type image display device, for example, there is one described in Japanese Patent Laid-Open No. 6-324649. According to this publication, as shown in FIG.
Proposed CD pattern and color filter structure, and G
A panel driving method having means for adjusting the brightness level of the (green) display pixel is proposed. That is, FIG.
The D pattern and the structure of the color filter arranged on the front surface thereof are shown. As shown in the LCD pattern diagram, the vertical signal lines L _j , L _{j + 1} , L _{j + 2} , ... And the gate lines G _i ,
G _{i + 1} , G _{i + 2} ... Are arranged in a straight line to eliminate the difficulty of manufacturing the LCD pattern and the color filter.

This color filter has a structure of four display pixels (R (red) / G (green) / B (blue) / G) in a 2 × 2 arrangement.
(Green) filter or R (red) / G (green) / B
(Blue) / W (white) filter) forms one display block. On the other hand, the video signal is three primary color signals R / G / B
Therefore, some measure is required to display three signals with four pixels. As a measure against this, FIG.
As shown in (1), a circuit example provided with means (level converter) for adjusting the amplitude level of the G signal so that the brightness level of the G display pixel can be adjusted to 1/2 is taken up.

[0004]

As shown in FIG. 9, in the conventional configuration, two G display pixels (or one G display pixel and one W display pixel) are supplied with a 1/2 level G signal. , It is possible to improve the resolution. However, the three-color (R / G / B) signal and the G signal at a position different from the position of the three-color signal have different amplitudes,
That is, with four signals having levels of R signal: 1, G signal: 1/2, B signal: 1, and G signal at adjacent different positions: 1/2, four display pixels of 2 × 2 arrangement ( R / G / B / G
, Or R / G / B / W filters), which causes hue changes and color unevenness / color moiré.
Especially, there was a problem with images having high frequency components.

The object of the present invention is to solve the above problems,
An object of the present invention is to provide an address type image display device with high resolution by preventing hue change and color unevenness / color moiré.

[0006]

According to another aspect of the present invention, there is provided an address type image display device, wherein a display pixel block in which display pixels of three primary colors of red, green and blue are arranged in a line, and the display pixel block is arranged next to the display pixel block. And a video RGB signal supplied to the display pixels of the three primary colors, and a video signal including a luminance signal and a color difference signal, and a white display pixel. It is characterized by comprising a signal converting means for converting into a video luminance signal and a driving means for driving the display pixels of three primary colors and white by alternately switching the video RGB signal and the video luminance signal.

According to another aspect of the present invention, the address type image display device is characterized in that in the display section, the arrangement of the white display pixels in the display pixel block is reversed between the odd line and the even line.

According to another aspect of the present invention, in the address type image display device, the display section exchanges the arrangement of red display pixels and blue display pixels in the display pixel block for each predetermined unit of the display pixel block. It is characterized by forming an array structure.

In the address-type image display device of the present invention, R (red), G (green), B (blue), and W (white) display pixels are arranged in a line, and high resolution is achieved. Various color filter configurations and panel pattern configurations can be obtained. at the same time,
For the display pixels of R, G, B, and W, the image RGB signal and the image luminance signal, which are the drive signals, are alternately and sequentially switched to correspond exactly with the same amplitude. Eliminate the occurrence of moire.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an address type image display device according to the present invention. 2 is a configuration diagram showing a filter of the display unit, and FIG. 3 is an explanatory diagram showing a panel pattern of the display unit. This address type image display device has a configuration including a sampling circuit 10, a matrix conversion circuit 11, a video signal changeover switch and panel drive unit 12, and a panel video display unit 13.

The display unit 13 has an RGB block 1 in which display pixels of three primary colors (RGB) are arranged in a line, and a white (W) arranged next to the right of the RGB block 1 in the scanning line direction.
And a Y block 2 which is a display pixel of
GB block 1 and Y block 2 are repeatedly arranged in this arrangement. Therefore, the display pixels of the three primary colors and the display pixels of white are arranged in a line, which enables high-resolution image expression. As shown in FIG. 2, in the filter configuration, odd-numbered scan lines and even-numbered scan lines have the same arrangement, and are arranged in the order of RGBW from left to right. As a matter of course, as shown in FIG. 3, the panel patterns are also arranged in the order of RGBW in the same arrangement as the filter, and the vertical signal lines L _j and L are arranged.
_{j + 1} , L _{j + 2} , ... And gate lines G _i , G _{i + 1} , G _{i + 2}
... are arranged linearly.

The luminance signal Y, the color difference signal Pr, and the color difference signal Pb, which are video signals, are input to the input terminals TY, TPr, and TPb arranged in the preceding stage of the sampling circuit 10 and supplied to the sampling circuit 10. These video signals may be digital signals or analog signals.

The sampling circuit 10 includes video signals Y and P.
The matrix conversion circuit 11 samples r and Pb.
And the luminance / color difference video signals Y / Pr and Pb, and the luminance signal Yd to the video signal changeover switch and the panel driving unit 12. This matrix conversion circuit 1
At 1, the luminance / color difference video signals Y / Pr and Pb are converted into the three primary color video signals R / G / B. Here, in FIG.
d, Rd, Gd, and Bd are a luminance signal, a red signal, and
It is a green signal and a blue signal, and d is a serial number indicating the time sequence at the time of sampling.

Sampled video signals Yd, R from the sampling circuit 10 and the matrix conversion circuit 11
d, Gd and Bd are supplied to the video signal changeover switch & panel drive circuit 12 to the display pixel. The state of this operation is shown in FIG. In the video signal changeover switch & panel drive circuit 12 to the display pixel, an appropriate video signal is supplied to the panel video display section 13 to express a video. That is, the following operation is performed as shown in FIG.

A luminance video signal Yd; Y is output to the white (W) display pixel.
2, Y4, Y6 ... are sequentially supplied and driven.・ To the display pixel of red (R), red video signal Rd; R1, R
3, R5 ... are sequentially supplied and driven. -For the display pixel of green (G), the green video signal Gd; G1, G
3, G5 ... are sequentially supplied and driven. -For the display pixel of blue (B), the blue video signal Bd; B1, B
3, B5 ... are sequentially supplied and driven.

In this way, the video signal changeover switch & panel drive circuit 12 operates the video RGB signals Rd, Gd, Bd.
And the luminance signal Yd are sequentially switched alternately, and with the same amplitude,
The display pixels of the three primary colors and white of the panel image display unit 13 are driven. The display pixel configuration of the color filter is arranged in a line of R: G: B: W, and the vertical signal lines L _j of the panel pattern are arranged.
L _{j + 1} , L _{j + 2} , L _{j + 3} ... And gate lines G _i , G _{i + 1}
Since ... are linearly arranged, a high resolution and simple color filter structure and panel pattern structure can be obtained. At the same time, since the image RGB signal and the luminance signal are made to correspond exactly to the signals for driving the display pixels of R, G, B, and W (RGB block 1 and Y block 2), hue change and color unevenness / color Prevent moiré.

The arrangement of the above color filters may be as shown in FIGS. 5 and 6. FIG. 5 shows an RGB block 1 including display pixels of three primary colors (R / G / B).
And a Y block 2 which is a white (W) display pixel is arranged next to the display pixel, and a rank array (or Y from the RGB block 1 to the Y block 2 is arranged in an odd scan line). (Rank array from the block 2 to the RGB block 13) on the even scan lines from the Y block 2 to the RG
It is configured by arranging a rank array for B block 1 (or a rank array for RGB block 1 to Y block 2). That is, the arrangement of the Y blocks 2 with respect to the RGB elementary blocks 1 is reversed between the odd scan lines and the even scan lines. Further, the odd scan lines and the even scan lines are arranged so as to be offset by one pixel in the right direction. Since the display pixels of the panel image display unit 13 have such an array structure, the spatial distortion of the displayed image can be apparently reduced as compared with the configuration of FIG. FIG. 6 shows the arrangement of FIG.
The arrangement configuration is rotated once, and has the same effect as the configuration of FIG.

Further, from the arrangement configuration of FIG. 2, FIG. 5 and FIG.
The arrangement of the R display pixel (R filter) and the B display pixel (B filter) may be replaced. That is,
RGB block 1 consisting of display pixels of three primary colors (R / G / B) and Y block 2 adjacent to it which is a display pixel of white (W)
In the configuration of the display pixels in which the
Among them, the R display pixel (R filter) and the B display pixel (B filter) have an arrangement structure in which the arrangement is exchanged for each predetermined unit of the RGB block.

[0019]

According to the address type image display device of the present invention, the display pixels of the three primary colors and the white display pixels are arranged in a line so that a high-resolution image can be displayed.
Since the display signals of the three primary colors and the display pixels of white are strictly associated with the GB signal and the video luminance signal, a high-performance and high-quality video display device free from hue changes and color unevenness / color moire can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an address-type image display device according to the present invention.

FIG. 2 is a configuration diagram of a filter used in an address type display device according to the present invention.

FIG. 3 is an explanatory diagram of a pattern of a panel used in the address type display device according to the present invention.

FIG. 4 is an explanatory diagram showing an operation of a drive signal to a display pixel.

FIG. 5 is another configuration diagram of a filter used in the address type display device according to the present invention.

FIG. 6 is still another configuration diagram of a filter used in the address type display device according to the present invention.

FIG. 7 is a block diagram and an LCD pattern of a filter in a conventional solid-state display device.

FIG. 8 is a circuit block diagram in a conventional solid-state display device.

FIG. 9 is an explanatory diagram showing an operation of driving signals to display pixels in a conventional example.

[Explanation of symbols]

1 RGB block 2 Y blocks 10 Sampling circuit 11 Matrix conversion circuit 12 Video signal changeover switch and panel drive circuit 13 panel image display

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Claims (3)

(57) [Claims] 1. A display unit in which display pixel blocks in which display pixels of three primary colors of red, green, and blue are arranged in a line, and white display pixels arranged next to the display pixel block are repeatedly arranged, and a luminance signal. A video signal, which is a color difference signal, is input to convert the video RGB signal supplied to the display pixels of the three primary colors into a video luminance signal supplied to the white display pixel, the video RGB signal and the video RGB signal. An address-type image display device, comprising: driving means for driving display pixels of three primary colors and white by alternately switching video luminance signals in sequence. 2. The address-type image display device according to claim 1, wherein in the display unit, the arrangement of white display pixels in the display pixel block is reversed between an odd line and an even line. 3. The display unit has an array structure in which the arrangement of red display pixels and blue display pixels in the display pixel block is exchanged for each predetermined unit of the display pixel block. The address-type image display device according to item 1 or 2.