JPS60207118A - Matrix type full-color liquid crystal display panel - Google Patents

Abstract

PURPOSE:To attain color mixture sufficiently by arraying three primary color areas horizontally, row by row, or vertically, column by column at specific repetition pitch so that odd-numbered rows or columns and even-numbered rows or columns have array deviation a half as large as the pitch. CONSTITUTION:A figure shows an example of the color array of a three primary color (R, G, and B) mosaic filter and dotted-line squares 16 indicate transparent picture-element electrodes. One primary color filter area is provided to every two transparent picture-element electrode 16 and in this example, primary color areas of R, B, and G are arrayed horizontally for every row of picture element electrodes 16 at repetition pitch six times as large as the pitch of electrodes 16. Then, odd-numbered rows and even-numbered rows have array deviation a half the repetition pitch in the same primary color areas, i.e. three times the pitch of picture element electrodes 16.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a colorized liquid crystal display panel, and more particularly to a matrix type full color liquid crystal display panel of the type using a thin film transistor array and a color mosaic filter.

[Technical background of the invention and its problems]

There are two ways to colorize a liquid crystal display panel: one uses the optical properties of liquid crystal itself, and the other uses a combination of color filters or color light sources. A method of combining a color filter with an active matrix driven panel using a thin film transistor (TPT) array is promising and is being actively developed.

FIG. 1 is a cross-sectional view for explaining the general structure of a liquid crystal display panel using a TFT array, showing a transparent substrate 3 on which TFTs and transparent pixel electrodes 2 are formed, and a transparent substrate on which a transparent counter electrode 4 is formed. A liquid crystal 6 is sandwiched between the display panel 5 and the display panel 5 to form a panel. TFT 1 has a drain electrode 7. Source electrode 8° semiconductor film 9. Dirt insulation film 10. Dart electrode 1
1 and a protective film 12. The TFT 1 and the transparent pixel electrode 2 are arranged in a matrix as shown in FIG.
will be provided. When the dart lines 13 are sequentially scanned and a parallel signal is applied to the drain line 14 in synchronization with this, the liquid crystal 6 between the pixel electrode 2 and the counter electrode 4 is driven line-sequentially, and an image or the like is displayed. .

FIG. 3 is a diagram showing the arrangement of the transparent pixel electrode 2 on the TFT array of FIG. 2, and the TFT 1 is provided at the intersection of the dart line 13 and the drain line 14.

Figure 4 is a cross-sectional view illustrating an example of forming a color filter that is necessary when colorizing the liquid crystal display panel in Figure 1, and Figure 4 (,) shows three primary colors (R, G, B). A case is shown in which the filter 15 is formed on the inner surface of the transparent counter electrode 4 formed on the inner surface of the transparent substrate 5 shown in FIG. B) Filter 15
The transparent counter electrode 4 is deposited thereon after the transparent counter electrode 4 is formed.

FIG. 5 is a diagram showing a conventional color arrangement of the three primary color filter 15 shown in FIG. 4, and a rectangle 16 drawn with a dotted line shows a part of the arrangement of the transparent pixel electrodes 2 shown in FIG. Figure 5 (,)
is an example of a three primary color (R, G, B) stripe filter, and FIG. 5(b) is an example of a three primary color (R, G, B) mosaic filter.

By incorporating such a color filter into the liquid crystal display panel shown in FIG. 1, color images can be displayed. However, if the pitch of the transparent pixel electrodes, that is, the color f of the three primary color filters, is not sufficiently fine, the colors cannot be mixed sufficiently, and the bright and dark striped pattern related to the color arrangement is conspicuous.

[Purpose of the invention]

The present invention was made in view of the above circumstances, and it is necessary to devise the color arrangement of the three primary color filters, the arrangement of the pixel electrodes, and the relationship between the two, so that the number of pixel electrodes is not so large or the pixel electrode pitch is sufficient. It is an object of the present invention to provide a matrix-type full-color liquid crystal display panel that can perform color mixing well and prevent the striped pattern from being noticeable even when the stripe pattern is not very thin.

[Summary of the invention]

The present invention comprises a first transparent substrate on which transparent pixel electrodes each having a thin film transistor switch are arranged in a matrix, and a second transparent substrate on which a color mosaic filter and a transparent counter electrode are laminated and adhered. In the IJ box type pull color liquid crystal display panel with a liquid crystal sandwiched between them, the color arrangement of the color mosaic filter is as follows:
The three primary color areas are sequentially arranged horizontally in each row or vertically in each column at a predetermined repeating pitch,
It is characterized in that a half of the repetition pitch or an arrangement shift before and after that is provided between odd rows or columns and even rows or columns, and the color mosaic filter has the above-mentioned at a position corresponding to each primary color region of the color mosaic filter. It is characterized in that transparent pixel electrodes are arranged and formed, and furthermore, two adjacent
The present invention is characterized in that one primary color filter area is provided corresponding to one of the transparent pixel electrodes.

[Embodiments of the invention]

FIG. 6 is a diagram showing an example of the color arrangement of the three primary colors (R, A, B) mosaic filter according to the present invention, and the conventional TFT array shown in FIG. 3 can be used as the TFT array. The transparent pixel electrode 2 in FIG. 3 is shown as a dotted rectangle 16 in FIG. 6 in correspondence with the color mosaic. This embodiment is characterized in that one primary color filter area is provided corresponding to two adjacent transparent pixel electrodes 16. In the example of FIG. 6(,), each row of pixel electrodes 16 has R, B, and
The primary color areas are sequentially arranged in the horizontal direction, and there is a misalignment between the odd and even rows by half the repetition pitch, that is, three times the 16-bit pixel electrode, in the same primary color area. ing. The example in Figure 6(b) is 1
The color mosaic arrangement in the example of FIG. 6(a) is rotated by 90 degrees, and each primary color region is arranged in a first order in the vertical direction for each column of pixel electrodes 16. A misalignment similar to that shown in FIG. 6(-) is provided between odd-numbered columns and even-numbered columns. As described above, this alignment deviation is preferably half the repetition pitch of the three primary color areas, but some errors in the forming process are not a problem.

Incidentally, since a plurality of adjacent pixel electrodes are made to correspond to one of each of the R, B, and G color mosaics, manufacturing of the TFT array is easier than in the embodiment described later.

FIG. 7 (Jl) I (b) is a diagram showing the electrode arrangement on the TPT play used in another embodiment of the present invention,
The same members are given the same reference numerals to correspond to those in FIG.

In FIG. 7(,), the arrangement of pixel electrodes 2 is vertically shifted by half the pixel electrode pitch between odd-numbered columns and even-numbered columns. For this reason, the gate line 13 is meandering. In FIG. 7(b), there is a horizontal shift between odd and even rows by half the pixel electrode pitch. Therefore, the drain line 14 is meandering.

Figure 8 (&), (b) is Figure 7 (a) t (b)
The three primary colors (R.

G, B) A diagram showing the color arrangement of a mosaic filter, in which the rectangle 16 indicated by a dotted line shows a part of the arrangement of the pixel electrodes 2 in FIGS. 7(a) and 7(b).

Fig. 8(,) is used for the TFT array of Fig. 7(,), and Fig. 8(b) is used for the TFT array of Fig. 7(b).
This is used for FT arrays. Both are 1
This embodiment differs from the embodiment (FIG. 6) in that one primary color region is provided corresponding to one pixel electrode 16, but the method of arranging each primary color region is the same as in the embodiment (FIG. 6).

Good color mixing can be achieved by forming a mosaic filter with a three primary color arrangement as explained in the above two embodiments on the inner surface of the transparent substrate 5 of the liquid crystal display panel in FIG. 1 as explained in FIG. In addition to the configuration shown in Fig. 1, for example, in the twisted nematic (TN) type, in addition to the configuration shown in Fig. 1, it is possible to obtain a matrix type Fluka21 liquid crystal display panel that prevents the conspicuousness of bright and dark stripes. , a polarizing plate is combined on the outside of both transparent substrates 3 and 6.

[Effects of the Invention] As described above, according to the present invention, by devising the color arrangement of the three primary color filters, the arrangement of the pixel electrodes, and the relationship between the two, the number of pixel electrodes is not so large, or the pixel electrodes are Even when the pitch is not thin enough, a full-color VIIa display panel can be mounted on the matrix 1 that allows good color mixing and prevents the striped pattern from becoming conspicuous.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view to explain the structure of a liquid crystal display i4 channel using a general TFT array, and Figure 2 is a cross-sectional view of a general TFT array.
A circuit diagram for explaining the configuration of the array, FIG. 3 is a configuration diagram showing the arrangement of electrodes on the TFT array in FIG. 2, and FIG. 4 is a cross-sectional view for explaining an example of forming a general color filter.
FIG. 5 is a plan view showing the conventional three primary color arrangement of the color filter shown in FIG. 4, FIG. 6 is a plan view illustrating an embodiment of the three primary color arrangement of the color filter in the present invention, and FIG. A configuration diagram showing the arrangement of electrodes on the TPT playback used in other embodiments of the invention, and FIG. 8 is a plane diagram for explaining an example of the three primary color arrangement of the color filter in the device of the present invention using the TPT' array of FIG. 7. It is a diagram. DESCRIPTION OF SYMBOLS 1... TPT%j-''・Transparent pixel electrode, 3... Transparent substrate, 4... Transparent counter electrode, 5... Transparent substrate, 6...
...Liquid crystal, 13...Dart line, 14...Drain line, 15...Three primary color filter 116...Transparent pixel electrode, RIG and B...Each primary color area O of the color filter
Applicant's representative Patent attorney Takehiko Suzue Figure 1 Section 2 Figure 3 Figure 4 (b) Figure 5 (a) '' (b) Figure 6 616 (b) Figure 8

Claims (3)

[Claims] (1) a first transparent substrate on which transparent pixel electrodes equipped with thin film transistor switches are arranged in a matrix;
In a matrix type pull color liquid crystal display panel in which a liquid crystal is sandwiched between a second transparent substrate on which a color mosaic filter and a transparent counter electrode are laminated and adhered, the color mosaic filter has three color arrangements. The primary color areas are sequentially arranged horizontally in each row or vertically in each column at a predetermined repeating pitch, and there is an arrangement shift of half of the repeating pitch or before and after that between odd rows or columns and even rows or columns. A matrix-type full-color liquid crystal display featuring a J?
Nell〇 (2) The matrix-type full-color liquid crystal display panel according to claim 1, wherein the transparent pixel electrodes are arranged in positions corresponding to each primary color region of the color mosaic filter. (3) The matrix type pull-color liquid crystal display panel according to claim 1, wherein one primary color filter area is provided corresponding to two adjacent transparent pixel electrodes.