JPH09204156A - Display device - Google Patents

Abstract

(57) Abstract: To provide an arrangement of RGB pixels which can be easily seen by human eyes. SOLUTION: One picture element composed of pixels of RGB three primary colors is arranged so as to have two pixels when viewed in the horizontal direction and in the vertical direction. Moreover, the pixels of the three primary colors are not separated. Also, one picture element forms a rectangle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a color display device.
Regarding the arrangement of RGB pixels.

[0002]

2. Description of the Related Art In recent years, the informatization of society is rapidly advancing, such as by the entertainment of multimedia. The development of computers has greatly contributed to the progress of computerization.
There is a display device as a peripheral device that serves as a man-machine interface between the computer and a human. CRTs have been widely used for this display device, but various types of devices have begun to appear in the world.
The stronghold is being destroyed. These display devices include liquid crystal display devices, projectors, plasma display devices, electron beam flat displays, LED display devices, and the like.

Among these, when a VGA-compatible image is displayed on a liquid crystal display device, the conventional pixel arrangement is 1 as shown in FIG.
There is a vertical stripe arrangement (a) of RGB3 pixels for picture elements, and a delta arrangement (b) in which pixels are shifted for each horizontal scanning line to form a triangle with three RGB pixels over two horizontal scanning lines.

[0004]

However, in the conventional display device, in the case of the stripe arrangement, the number of pixels in the horizontal direction is tripled as compared with that in monochrome, and thus miniaturization becomes difficult.
Also, because the same color stands out in the vertical direction, vertical streaks are visible. Further, in the delta arrangement, one picture element is formed over two rows of horizontal scanning lines, so the vertical resolution drops to half. Moreover, since the pixels are shifted for each horizontal scanning line, the vertical line edges of the display image appear jagged.

Therefore, it is an object of the present invention to solve the above problems and to provide a display device having an RGB pixel arrangement which is easily seen by human eyes.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventors have made intensive efforts and, as a result, have obtained the following invention. That is, the display device of the present invention, one picture element consisting of pixels of the three primary colors of RGB is arranged so as to have two pixels when viewed from the horizontal direction and the vertical direction, and the one picture element Among them, the pixels of the three primary colors are not separated, and
It is characterized in that the picture elements form a rectangle.

[0007]

1 shows an arrangement of RGB pixels according to the present invention. These have only 2/3 of the pixels in the horizontal direction compared to the stripe arrangement. By reversing every picture element as shown in (c), the connection of B can be erased, and the interference with the image quality can be reduced. In (d), 0.5 pixels are shifted for each adjacent line. At this time, sample every line
It will be shifted by 0.5 pixel, improving the horizontal resolution. In (e), since there is a difference in human visual sensitivity between RGB, the area of the RGB pixel is changed according to the difference. (f)
In G, G is the most prominent to the human eye, and B is the least noticeable to the human eye. In the arrangement in which B is continuous in (f), the connection is less noticeable than when G is continuous as in (g).

FIG. 2A shows the RGB pixel arrangement of FIG. 1A as a circuit of a liquid crystal display device. 1 is a horizontal scanning line, 2 is a vertical signal line, 3 is a thin film transistor, 4 is a storage capacitor, 5 is a liquid crystal, 6
Is a horizontal shift register (HSR), 7 is a vertical shift register (V
SR), 8 are transfer transistors, and 9 is an RGB video signal input line. The horizontal shift register 6 outputs the video signal from the video signal input line 9 to the vertical signal line at the timing of horizontal scanning. Then, the vertical shift register 7 outputs a selection pulse to the horizontal scanning wiring 1 to sequentially select rows. The thin film transistors belonging to the selected row are turned on, and signals are written in the liquid crystal 5 and the storage capacitor 4. Figure 2 (b)
3A shows the positional relationship between the RGB pixel arrangement and the horizontal scanning line 1 and the vertical signal line 2 in the liquid crystal display device of FIG. As shown in the figure, by arranging the horizontal scanning lines 1 and the vertical signal lines 2 as close as possible to the end portions of the RGB pixels, the aperture ratio of the pixels can be increased.

The display device applicable to the present invention is a TFT type liquid crystal display device, a simple matrix liquid crystal display device, a projector using them, a plasma display device, an electron beam flat display, an LED display, a DMD (Digital Micro Display).
mirror Device) etc.

[0010]

According to the present invention, the number of pixels of one picture element in the horizontal method is 2/3 as compared with the stripe arrangement, so that miniaturization is easy and vertical stripes are not noticeable. Also, the vertical lines are less noticeable than the delta arrangement.

[Brief description of drawings]

FIG. 1 is an arrangement diagram of RGB pixels according to the present invention.

FIG. 2 is a circuit diagram of a TFT type liquid crystal display device to which the present invention is applied.

[Figure 3] Conventional RGB pixel layout

[Explanation of symbols]

 1 horizontal scanning line 2 vertical signal line 3 thin film transistor 4 storage capacitor 5 liquid crystal 6 horizontal shift register 7 vertical shift register 8 transfer transistor 9 video signal input line

Claims (1)

[Claims] 1. A single picture element consisting of pixels of three primary colors of RGB is arranged so as to have two pixels both when viewed in the horizontal direction and in the vertical direction, and the three picture elements among the one picture element are arranged. A display device characterized in that pixels of primary colors are not separated from each other and a rectangle is formed by one picture element.