JP2572702B2 - 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 a display device. Further, the present invention relates to a pixel shape of a display device, and more particularly, to a full color using an active matrix type driving method.
And an object thereof is to improve the display quality of the display device for display.

[0002]

2. Description of the Related Art In recent years, as a display device, a flat display device that can replace a conventional CRT has been mainly developed, and a flat display using various display elements has been actively developed. For example, a liquid crystal display device, EL
(Electroluminescence) Display devices and the like, and the former liquid crystal display devices are particularly used in watches, calculators, etc. because they are driven at low voltage and low power and display quality is good. Great demand is expected for automobiles and home appliances. As shown in FIG. 1, one active matrix method of driving a liquid crystal includes an X-direction signal line (timing signal line) and a Y-direction signal line (data signal line).
An active element, for example, a transistor or a non-linear element, is disposed at the intersection with the liquid crystal to selectively drive the liquid crystal. In order to drive the liquid crystal at a duty ratio close to 100% as compared with the time division driving method. In addition, the display quality with high contrast and easy to see can be obtained. FIG. 1 is a circuit diagram of a liquid crystal display device using an active matrix driving method. In the figure, 1 is a timing signal line, 2 is a data signal line, and 3 is a pixel circuit. FIG. 2 is a detailed drawing of the pixel circuit, where 4 is a transistor and 5 is a liquid crystal drive electrode.
6 is a liquid crystal layer , and 7 is a counter electrode on a counter substrate. A capacitor may be inserted in parallel with the liquid crystal layer. As a display principle, when the transistor 4 is turned on by a timing signal, data is written from a data signal line. This data is temporarily stored in the capacitance component of the liquid crystal layer, and drives the liquid crystal until the next signal is input. Since the liquid crystal display device of the active matrix drive system can be driven at a duty ratio of 100% in principle, it is expected to be used for a large-capacity display such as a liquid crystal television.

[0003]

The display electrodes of these liquid crystal display devices usually have a rectangular or square shape as shown in FIG. Such a shape can be generally applied to alphanumeric display, graphic or image display. However, in the case where a display with higher resolution is required, and particularly in the case of a display in which a resolution in a diagonal direction or a sharpness of a line is required, such a conventional rectangular or square display electrode shape is used. Then, such characteristics may not be obtained. More recently, in a situation where a liquid crystal display device using an active substrate in which a thin film transistor such as a silicon thin film is formed on a transparent substrate is near practical use, full-color display using a color filter has become possible. Therefore, there is a problem that it is difficult to obtain a full-color display with high resolution by using a conventional square or rectangular display electrode.

[0004]

A display device according to the present invention comprises:
It was invented to solve the conventional problems,
Liquid crystal is sealed between a pair of substrates, a plurality of scanning signal lines and data signal lines are wired on one of the pair of substrates, and an active element is connected to the scanning signal lines and the data signal lines. And a pixel electrode connected to the active element, wherein the shape of the pixel electrode is a regular triangle, and each of the regular triangle pixel electrodes is closest-packed, The feature is that the display quality of full-color display is improved by adopting a configuration in which color filters of three primary colors corresponding to the above-mentioned shape are regularly arranged so that the same color does not adjoin. Hereinafter, the contents of the present invention will be described with reference to examples.

[0005]

FIG. 4 shows a scanning signal line of a display device according to the present invention .
9, data signal line 10, transistor 11, and display electrode
12 shows an example of the configuration of FIG. The shape of the display electrode 12 is a regular triangle
It has a shape. The scanning signal lines 9 are arranged in parallel with one side of the regular triangle, and may be arranged between the display electrodes 12 . The data signal line 10 is arranged so as to pass through one apex angle of an equilateral triangle. Features of the display quality of the liquid crystal display device using a display electrode 12 having such a positive triangle is the point that the oblique direction of the line comes into sharp, particularly suitable for a liquid crystal display device of the display contents displayed in the oblique direction is large ing.

FIG. 5 shows an arrangement of color filters of three primary colors when a full-color display is performed using a liquid crystal display device having a display electrode of an equilateral triangle. In the example of FIG.
(Red) and G (green), G and B (blue), and B and R are arranged at regular intervals so that the same color is not adjacent to each other. It can be said that the ideal three primary colors arrangement for.

Further, in the case of a TFT type active matrix display element device, the data signal lines, scanning signal lines is considered a method of forming parallel to both the positive triangular shape of the pixel electrode edges.

In the case of a TFT type active matrix display device, a black matrix is formed on a signal line for the purpose of preventing a leak current due to light from a TFT, and thus there is a problem that an aperture ratio of a pixel is reduced. When a signal line is formed in parallel with the pixel electrode in the space between the regular triangular pixel electrodes, even if a black matrix is provided, the overlap between the pixel electrode and the black matrix is minimized, and the pixel The aperture ratio of the electrode can be secured. Although the present invention mainly describes a liquid crystal display device, the present invention is not limited to this, and any display device using an active substrate can be applied to EL and other displays. is there.

[0009]

According to the present invention, as described in the above embodiments, the shape of the pixel of the display device, in other words, the shape of the display electrode is an equilateral triangle, and each of the equilateral triangles is closest packed. In addition, by combining color filters of three primary colors that correspond to the shape of each pixel and are arranged regularly so that the same color does not adjoin, the effect of improving the sharpness of lines in the oblique direction and the resolution of color display is improved. The present invention improves the quality of the required full-color display content, and greatly contributes to the improvement of the display quality of a liquid crystal display device having a wide range of applications, not limited to image display.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of an active matrix type liquid crystal display device.

FIG. 2 is a circuit diagram of an active matrix type liquid crystal display device.

FIG. 3 is an explanatory diagram of a conventional pixel pattern and display electrode shape.

FIG. 4 is an explanatory diagram of a pixel pattern of the liquid crystal display device according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an arrangement of three primary colors of a liquid crystal display device according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 scanning signal line 2 data signal line 3 pixel 4 transistor 5 display electrode 6 liquid crystal layer 7 counter electrode 8 display electrode 9 scanning signal line 10 data signal line 11 display electrode

Claims (1)

(57) [Claims] 1. A liquid crystal is sealed between a pair of substrates, a plurality of scanning signal lines and data signal lines are wired on one of the pair of substrates, and the plurality of scanning signal lines and data signal lines are connected to each other. In a display device having an active element connected to the active element and a pixel electrode connected to the active element, the shape of the pixel electrode is a regular triangle, and each of the regular triangular pixel electrodes is closest-packed. A display device, wherein color filters of three primary colors, which are filled and correspond to the shape of the pixel electrode, are regularly arranged so that the same color does not adjoin.