JPS61282823A - Liquid crystal panel for color television - Google Patents

Abstract

PURPOSE:To prevent the bias of colors by forming R, G and B filters into a regular hexagonal shape, disposing these filters to a regular triangular shape, forming transparent electrodes corresponding to the filters to the regular hexagonal shape as well and disposing the same into a matrix shape. CONSTITUTION:Transparent electrodes 2 connected on one end thin film transistors TFT1 are disposed to the matrix shape to form a glass substrate 3. A color filter 6 disposed with picture elements 5 of the three primary colors; R, G, B to a mosaic shape is provided on the other glass substrate 4. A liquid crystal not shown is injected between the glass substrates 3 and 4. Polarizing plates are provided to the top and rear surfaces. The element 5 are formed to the regular hexgonal shape. The R, G, P picture elements are repeatedly disposed to the regular triangular shape. The transparent electrodes of the substrate 3 are also formed to the regular hexagonal shape. A transparent electrode 10 and an oriented film 11 are laminated on the substrate 4. The bias of colors is thereby prevented and the threshold distance of color mixing is shortened. The formation of the filter is thus made easy.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a liquid crystal panel for a color television, and particularly relates to an improvement in the arrangement pattern of color filters.

(B) Conventional technology As shown in Fig. 2, a conventional color liquid crystal display panel consists of a transparent substrate (R) on which a transparent conductive film GO is formed, a silicon substrate (C) on which a switching transistor (2) and a capacitance @ are formed. It consists of a liquid crystal (c) sandwiched between the two. By arranging such switching transistors and capacitances in an XY dot matrix and driving them in line-sequential manner, character and graphic displays are possible.

In such display systems, conventional liquid crystal driving methods include DSM (dynamic scattering effect), GH (guest host), and P
Methods such as T (phase transition) have been tried, but these are monochrome and cannot display multiple colors, so each square pixel is colored green (G1.Blue).
B, red (8), etc. as color pixels in Figure 3 "tb"
As shown in tCtd, the pixels are arranged regularly in stripes, wild geese, mosaic, zigzag mosaic, etc., and each color pixel is driven according to color information to colorize the display.

The above-mentioned technique is described in Japanese Unexamined Patent Publication No. 120976/1983.

(c) Problems to be Solved by the Invention When images are displayed on the conventional color liquid crystal display panel mentioned above, the distribution of each R, G, and B33 original pixel is not equal due to the arrangement of the pixels. The colors were distorted and mixed, and it took some distance to see them.

B) Means for Solving the Problems The present invention has been made in view of the above-mentioned points, and includes R, G, B3 arranged in a mosaic pattern on the color filter (6).
Each pixel (5) of the three originals is formed in a regular hexagonal shape, and the R, G, and B pixels (5) are arranged in an equilateral triangular shape, corresponding to the filter (6) formed in the regular hexagonal shape. The transparent electrode (R) is also formed in a hexagonal shape.

The R, G, and B signal lines (8) are provided vertically along the sides of a regular hexagonal transparent electrode (R), and the transparent electrode (R) corresponds to a filter to be driven by a signal. It is connected to the source or drain of a K-connected TFT (thin film transistor) (1), and the scanning line (9) is provided laterally along the side of the hexagon and is connected to the gate of the TFT (1) and is active. It is for driving and displaying.

(e) Effect The same effect as described above (by forming the pixel shape in a hexagonal shape and arranging it in an equilateral triangle shape, and by extending the signal line in the vertical direction along the side of the hexagonal transparent electrode) It can be connected to the transparent electrodes forming the color pixels, and by arranging scanning lines in the horizontal direction on the sides of the hexagon, the transparent electrodes forming the pixels of the row can be connected.

(f) Example As shown in FIG. 1, the liquid crystal panel for color television according to the present invention consists of a glass substrate (3) on which transparent electrodes (R) connected to one end of TPT (1) are arranged in a matrix. And red (8), green (G,
It is equipped with a color filter (6) in which pixels (5) of each of the three primary colors of blue (6) are arranged in a mosaic pattern, and a liquid crystal is provided between the glass substrate (3) on which the TFT is provided and the glass substrate (4). is injected with polarizing plates on the top and back surfaces. Further, each of the R, G, and B pixels (5) is formed in a regular hexagonal shape, and the R, G, and B pixels (5) are repeatedly arranged in a relatively equilateral triangular shape, and the hexagonal filter (6) The corresponding transparent electrode (R) is also formed in a hexagonal shape, and the R, G, and B signal lines (8) and scanning lines (9) are arranged along the sides of the hexagonal transparent electrode in the vertical and vertical directions, respectively. Extended laterally.

An ITO film is formed on the glass substrate (4) as a transparent electrode on or below the color filter (6) to serve as a counter electrode, and an organic polymer film is formed on the transparent electrode to align liquid crystal molecules in one direction. is formed as an alignment film αυ.

The color filter (6) has R, G, and B pixels (5) arranged in a mosaic pattern and in an equilateral triangular shape.
Color filters (6) for configuring each of the three primary pixels (5) are each formed in a regular hexagonal shape.

On the glass substrate (3), R2O formed in a regular hexagonal shape,
A transparent electrode (R) is also formed in a hexagonal shape corresponding to each filter (6) of B, and a TFT corresponding to the transparent electrode (R) is formed.
(1). The R, G, and B signal lines (8) extend vertically along the sides of the transparent electrode (R) formed in a hexagonal shape, and the transparent electrode α constitutes the same-color drawing (5). In order to drive the value, it is connected to the source or drain of the TFT (11) connected to the transparent electrode (R).The scanning line (9) is connected along the side of the transparent electrode (R) formed in a hexagonal shape. It extends in the horizontal direction and is connected to the gates of TFTs (1) provided in each of the pixels in the horizontal row.

An alignment film is formed on the glass substrate (3) in the same manner as on the glass substrate (4), and the spacer and liquid crystal are sandwiched and combined to form a 900 twist TN cell. Furthermore, on the outside of the panel,
The polarizing plates are arranged so that their polarization axes are parallel or orthogonal to each other. When arranged in parallel, no light is transmitted when no electric field is applied to the pixel (5), and when an electric field is applied, the light passes through the color filter (6) and colored light is visible. The opposite is true for orthogonal cases.

According to the present invention, equal color distribution of the pixels (5) can be achieved, so that there is no local shift in color, and the image can be seen clearly even from a close distance.

(G) Effects of the Invention As described above, according to the present invention, the pixels are formed into a regular hexagonal shape and are repeatedly arranged in a relatively equilateral triangular shape, so that color shift is less likely to occur even when viewed locally. By making it possible to reduce the pitch of the three primary colors relative to the pixel size, it is possible to shorten the mixing color limit distance.

: Also, if the mixing color limit distance is set to the same distance as before: The pixels can be made larger,
The patterning accuracy in the three primary color filter formation process is improved.

Furthermore, since the pixels can be formed large and have a hexagonal shape that is closer to a circle than a square, filter formation using a dyeing method or a printing method can be easily performed.

Finally, in the present invention, since the signal line connects the same color pixels of 33 R, G, and B primary colors, the three primary color order switching circuits are not required as in the stripe type, which simplifies the manufacturing process and reduces costs by reducing circuit components. It is possible to reduce the

[Brief explanation of the drawing]

Fig. 1 is a perspective assembly view showing an embodiment according to the present invention;
The figure is a sectional view showing a conventional example, and FIG. 3 is an R2O, B arrangement pattern diagram. +1)...TFT (thin film transistor), (R)
...Transparent electrode, (3)...Glass substrate, (4)
...Glass substrate, (5)...Pixel, (6)...
Color filter, (8)...signal line, (9)...
Scanning line, frame...transparent electrode, ■...alignment film. Applicant Sanyo Electric Co., Ltd. and one other representative Patent attorney Masao Sano Figure 2 Figure 3 a Figure 3 b

Claims (1)

[Claims] 1. A glass substrate on which TFTs (thin film transistors) and transparent electrodes connected to one end of the TFTs are arranged in a matrix, and red (R), green (G), and blue (B) A liquid crystal panel for a color television consists of a color filter in which pixels are arranged in a mosaic pattern, a liquid crystal layer in which liquid crystal is injected between the glass substrate on which the TFTs are provided, and the color filter, and two polarizing plates. Each of the R, G, and B filters is formed in a regular hexagonal shape, and the R, G, and B are arranged in a regular triangular shape, and the transparent electrode corresponding to each of the regular hexagonal filters also has a regular hexagonal shape. A liquid crystal panel for color television, characterized by being formed into a.