JP2000330523A - Address type picture display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high resolution address type picture display device by preventing hue changes and color unevenness/color moire. SOLUTION: A display part 13 has the constitution in which an RGB block 1 having display pixels of primary colors R, G, B(red, green and blue) and a Y block 2 having display pixels of white(W) are arranged in a 2 by 2-4 display pixel arrangement. A sampling circuit 10 samples video signal and supplied luminance/color difference video signals Y/Pr, Pb to a matrix transformation circuit 11 and also supplies a luminance signal Yd to a video signal changeover switch and a panel driving circuit 12. The video RGB signals Rd, Gd, Bd transformed in the circuit 11 are supplied to the changeover switch and the circuit 12 for display pixels and the circuit 12 drives the display pixels of a panel video display part 13 by alternately and successively changing over the video RGB signals and the luminance signals Yd.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an address type display device for displaying an image and the like, and more particularly to an address type image display device having a color filter for displaying a multi-color image.

[0002]

2. Description of the Related Art A conventional address type display device is disclosed in, for example, Japanese Patent Application Laid-Open No. 6-324649. According to this, as shown in FIGS. 7 and 8, a panel driving method having a configuration of a color filter and a means for adjusting a luminance level of a G (green) display pixel is proposed. That is, FIG. 7 shows a configuration of the filter, and 2 ×
Four display pixels in two arrangements (R (red) / G (green) / B
(Blue) / G (green) filter or R (red) / G
By adopting a simple display block structure in units of (green) / B (blue) / W (white) filters, it is possible to eliminate the difficulty in manufacturing filters and panel patterns.

On the other hand, a video signal is composed of three primary color signals R / G /
As represented by B, as a countermeasure for displaying three signals with four pixels, the luminance level of the G (green) display pixel can be adjusted to half as shown in FIG. An example of a circuit including means for adjusting the amplitude level (level converter) of a G (green) signal is described.

[0004]

As shown in FIG. 9, in the conventional configuration, two G (green) signals of two levels are used for two G signals.
(Green) display pixel (or one G (green) display pixel and one
(White (W) display pixels), so that the resolution can be improved. However, three colors (R / G
/ B) The G signal at a position different from the position of the signal and the position of the three-color signal are respectively different in amplitude, that is, the R signal: 1, the G signal:
1/2, B signal: 1, next adjacent G signal: 1/2
And four display pixels (R / G / B / G filters or R / G /
(B / W filter), hue change, color unevenness / color moiré occurs, and there is a problem particularly in an image having a high frequency component.

[0005] An object of the present invention is to solve the above problems,
An object of the present invention is to provide a high-resolution address-type image display device in which hue change and color unevenness / color moiré are prevented from occurring.

[0006]

According to a first aspect of the present invention, there is provided an address type image display device, wherein a display pixel of three primary colors of red, green and blue and a white display pixel are repeatedly arranged in a 2 × 2 four pixel arrangement. Signal conversion means for inputting a video signal composed of a luminance signal and a color difference signal, and converting the video signal into a video RGB signal corresponding to the display pixels of the three primary colors and a video luminance signal corresponding to the white display pixel; And driving means for switching the image RGB signals and the image luminance signal alternately and sequentially to drive the three primary colors and white display pixels.

According to a second aspect of the present invention, there is provided an address type image display device according to the first aspect, wherein the display section comprises a display pixel array structure of three primary colors and white on odd scan lines and an even scan line. Are arranged so as to be shifted from each other by one pixel in the line direction.

According to a third aspect of the present invention, there is provided the address type image display device according to the first aspect, wherein the display unit includes a first primary and white display pixel array and the second adjacent display pixel array. Between the three primary colors and the white display pixel array in the second, white display pixels are arranged in the lower or upper stage in the first, and white display pixels are arranged in the upper or lower stage in the second. And

An address-type image display device according to a fourth aspect is the device according to the first, second or third aspect, wherein the display section comprises a red display pixel and a blue display pixel among three primary color display pixels. The arrangement is characterized in that the arrangement is such that the arrangement is changed every predetermined unit of the three primary color display pixels.

In the address type video display device of the present invention, the display pixels of the color filter are arranged in a 2 × 2 arrangement of four pixels, and R: G: B: W = 1: 1: 1: 1. at the same time,
Since the video RGB signal and the video luminance signal, which are drive signals, are alternately and sequentially switched to the R, G, B, and W display pixels to exactly correspond with the same amplitude, hue change and color unevenness / color Eliminate the occurrence of moire.

[0011]

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. FIG.
It is a block diagram showing a filter of a display part. 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 driving section 12, and a panel video display section 13.

As shown in FIG. 1, the display unit 13 includes an RGB block 1 composed of display pixels of three primary colors (R / G / B) and a Y block 2 composed of display pixels of white (W) in a 2 × 2 format. This is a configuration in which four pixels are arranged. As shown in FIG. 2, the filter configuration is such that the odd scan lines and the even scan lines have the same arrangement, and the RGB block 1 and the Y block 2 are composed of 2 × 2 pixels.
In the pixel arrangement, a G display pixel (G filter 3) is arranged at the center of the RGB block 1 so that a high-resolution image expression is possible.

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

The sampling circuit 10 samples the video signal and supplies the luminance / color difference video signals Y / Pr and Pb to the matrix conversion circuit 11 and supplies the luminance signal Yd to the video signal changeover switch and the panel drive unit 12. . This matrix conversion circuit 11 converts the luminance / color difference video signals Y / Pr, Pb into three primary color video signals R / G / B. Here, in FIG. 1, Yd, Rd, G
d and Bd are a luminance signal, a red signal, a green signal, and a blue signal, respectively, and d is a serial number indicating a time order at the time of sampling.

The sampled video signals Yd, R from the sampling circuit 10 and the matrix conversion circuit 11
d, Gd, and Bd are supplied to a switch & panel driving circuit 12 for switching a video signal to a display pixel. This operation is shown in FIG. The switch & panel drive circuit 12 for switching the video signal to the display pixel supplies an appropriate video signal to the video display unit 13 of the panel to express a video.
That is, the following operation is performed as shown in FIG.

A luminance video signal Yd; Y2,
Are sequentially supplied and driven. -Red image signal Rd; R1, R to display pixel of red (R)
, R5... Are sequentially supplied and driven. A green image signal Gd; G1, G to a green (G) display pixel;
, G5... Are sequentially supplied and driven. A blue video signal Bd; B1, B to a blue (B) display pixel
, B5... Are sequentially supplied and driven.

Thus, the video signal changeover switch & panel drive circuit 12 generates the video RGB signals Rd, Gd, Bd
And the luminance signal Yd are alternately and sequentially switched to drive the three primary colors and white display pixels of the panel video display unit 13. In this address type video display device, the display pixel configuration of the color filter is R: G: B: W = 1: 4 in a 2 × 2 4-pixel arrangement.
1: 1: 1, and the signals for driving the R, G, B, and W display pixels are strictly associated with the video RGB signal and the luminance signal. Eliminates the occurrence of changes and color unevenness / color moiré.

The arrangement of the above color filters is shown in FIG.
The configuration as shown in FIGS. 5 and 6 may be used. FIG.
An RGB block 1 composed of display pixels of three primary colors (R / G / B) and a Y block 2 composed of display pixels of white (W) are 2 ×
In a configuration of display pixels arranged in a two-pixel arrangement of two pixels, the display pixel arrangement structure of three primary colors and white on odd scan lines and the display pixel arrangement structure on even scan lines are shifted by one pixel in the line direction. It is made. The spatial distortion of the displayed image can be apparently reduced as compared with the configuration of FIG. Note that (A), (B), (C), and (D) in FIG.
This shows a case where the positions of the white (W) display pixels in the × 2 four-pixel arrangement are different.

FIG. 5 shows an RGB block 1 and a Y block 2
Are arranged in a 2 × 2 four-pixel arrangement, in which the first three primary color and white display pixel arrays and the second adjacent three primary color and white display pixel arrays are arranged. In the meantime, in the first place, the Y block 2 is arranged in the lower row (or upper row),
In the second case, the upper (or lower) white display pixel Y
Block 2 is arranged. There is an effect equivalent to the configuration of FIG.

FIG. 6 shows a combination of the configuration shown in FIG. 4 and the configuration shown in FIG. Furthermore, a configuration in which the arrangement of the R display pixels (R filter) and the B display pixels (B filter) is replaced with the arrangement configuration of FIGS. 2, 4, 5, and 6 may be employed. That is, three primary colors (R / G / B)
Pixel pixel block 1 as a display pixel and Y block 2 as a white (W) display pixel are arranged in a 2 × 2 arrangement of four pixels.
In the (red) / G (green) / B (blue) display pixel block 1, the arrangement of the R (red) display pixel (R filter) and the B (blue) display pixel (B filter) It has an array structure that is exchanged for each unit.

[0022]

According to the address type image display device of the present invention, display pixels (R / G / B) of three primary colors and a white (W) display pixel are arranged next to the display pixels. A high-resolution video expression is provided, and the three primary color display pixels and the white display pixel are strictly associated with the video RGB signal and the video luminance signal. Thus, a high-quality image display device can be obtained.

[Brief description of the 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 illustrating an operation of a drive signal to a display pixel.

FIG. 4 is another configuration diagram of a filter used in the address type display device according to the present invention.

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

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

FIG. 7 is a configuration diagram of a filter in a conventional solid-state display device.

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

FIG. 9 is an explanatory diagram showing an operation of a drive signal to a display pixel in a conventional example.

[Explanation of symbols]

 Reference Signs List 1 RGB block 2 Y block 10 Sampling circuit 11 Matrix conversion circuit 12 Video signal changeover switch and panel drive circuit 13 Panel video display section

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 3/20 680 G09G 3/20 680H H04N 9/30 H04N 9/30 F term (reference) 5C006 AA22 AC21 AF23 AF46 AF85 BB11 FA00 FA22 FA25 5C060 BA09 BB00 HB00 HB22 HC16 JA05 5C080 AA10 BB05 CC03 DD05 DD06 EE29 EE30 FF12 GG09 JJ01 JJ02 5C094 AA08 AA48 AA55 CA19 CA20 CA24 ED03 FA01

Claims (4)

[Claims] 1. A display section in which display pixels of three primary colors consisting of red, green and blue and white display pixels are repeatedly arranged in a 2 × 2 four-pixel arrangement, and a video signal consisting of a luminance signal and a color difference signal is inputted. A video RGB signal corresponding to a display pixel of three primary colors, a signal converting means for converting the video RGB signal into a video luminance signal corresponding to the white display pixel, and the video RGB signal and the video luminance signal are alternately and sequentially switched to sequentially output the three primary colors. And a driving means for driving a white display pixel. 2. The display unit according to claim 1, wherein a display pixel array structure of three primary colors and white in odd scan lines and a display pixel array structure in even scan lines are shifted by one pixel in the line direction. The address type image display device according to claim 1. 3. The display section between the first three primary color and white display pixel arrays and the second adjacent three primary color and white display pixel arrays, 2. The address type image display device according to claim 1, wherein white display pixels are arranged in an upper stage, and white display pixels are arranged in an upper stage or a lower stage in a second stage. 4. The display unit according to claim 1, wherein the display unit has an array structure in which the arrangement of red display pixels and blue display pixels among the three primary color display pixels is exchanged for each predetermined unit of the four pixel arrangement. 4. The address type image display device according to 1, 2, or 3.