KR19980020100A - LCD - Google Patents

Abstract

The present invention relates to a liquid crystal display device, comprising: a lower support plate including an ITO electrode layer, a partition wall portion provided with a strip-shaped partition wall having a predetermined height on an upper surface of the lower support plate, and an ITO electrode layer provided on an upper surface of the partition wall portion and supported by a partition wall. A liquid crystal display device having a liquid crystal injected into a spaced space between an upper support plate, an upper support plate, and a lower support plate, wherein the partition walls include: first partition walls having a plurality of rectangular pulse shapes periodically arranged; and both sides of the first partition walls; A second partition wall which connects an outer circumferential surface of the first partition wall at one end to form one first space part; And a third partition wall which connects the inner circumferential surface of the first partition wall to form a second space part which is not in communication with the first space part, and injects a liquid crystal added with a different color dye into each space part to display a color display. It is characterized by the implementation of. This eliminates the need for a conventionally inserted color filter layer to achieve color, which results in a thinner total thickness of the device.

Description

LCD

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device (LCD), and in particular, a liquid crystal display device that implements a multi-colored color, which is configured to encapsulate liquid crystals having different colors to implement a pattern of a partition provided to maintain a constant liquid crystal gap. It is about.

In the liquid crystal display device, a film-type liquid crystal display device employing a flexible plastic film substrate as a substitute for a glass substrate that is easily broken and difficult to produce below a certain thickness is thin, lightweight and durable with a thickness of 0.5 mm. Because of its superiority, it is widely used in portable and mobile devices.

As the film type liquid crystal display device, both twisted nematic (TN) and super twisted nematic (STN) types are applied, the field of application thereof is expanding.

1 is an exploded perspective view schematically showing a conventional film liquid crystal display device.

As shown in the figure, the film type liquid crystal display device has rib-shaped partition walls 3 on the upper surface of the upper support plate 1, the lower support plate 2, and the lower support plate 2 formed of a plurality of layers. Many are formed. The nematic liquid crystal is interposed in the internal space provided between the separation distance of the upper support plate 1 and the lower support plate 2 corresponding to the height of the rib-shaped partition wall 3.

In driving the liquid crystal, the gap of the liquid crystal layer corresponding to the height of the liquid crystal layer is an important parameter for determining the driving characteristics of the liquid crystal, and it is very important that the height of the liquid crystal layer set to obtain a desired characteristic is kept constant. In this way, it is possible to suppress fluctuations in the separation distance between the upper support plate 1 and the lower support plate 2 due to the flexibility of the upper and lower support plates 1 and 2 formed of plastic material in order to obtain a constant driving characteristic of the liquid crystal. The partition 3 is provided for the purpose. Even when a glass substrate is used, a partition wall 3 formed by a conventional sealant is provided to form a space for trapping a liquid crystal interposed between the upper support plate 1 and the lower support plate at a predetermined height. In addition, a spacer having a diameter corresponding to a gap of the liquid crystal layer is introduced, but the number of partitions to be applied is smaller than that of a plastic substrate material.

The present invention provides a liquid crystal display device capable of multicolor driving by forming a plurality of spaces so that different colors of liquid crystals formed by the pattern of the partition wall required for gap adjustment of the liquid crystal are not mixed with each other, as described above. The purpose is.

1 is an exploded perspective view schematically showing the structure of a conventional film type liquid crystal display device.

Figure 2 is an exploded perspective view schematically showing the structure of a film type liquid crystal display device according to the present invention.

Explanation of symbols for main parts of the drawings

1, 11: upper support plate 2, 12: lower support plate

3, 14: partition 13: partition wall

15: first space portion 16: the second space portion

21, 31: plastic substrate 22, 32: gas barrier layer

23, 33: first covering layer 24, 34: second covering layer

25, 35: ITO electrode layer

In order to achieve the above object, a liquid crystal display device according to the present invention includes a lower support plate including an ITO electrode layer, a partition wall portion having a strip-shaped partition wall having a predetermined height on an upper surface of the lower support plate, and an ITO electrode layer and an upper surface of the partition wall portion. In the liquid crystal display device provided in the liquid crystal display device provided in the separation space between the upper support plate, the upper support plate and the lower support plate provided in the partition, wherein the partition portion is a first partition wall in which a plurality of rectangular pulse shapes are arranged periodically ; Second barrier ribs forming one first space portion by connecting outer peripheral surfaces of the first barrier ribs at both side ends of the first barrier rib; And a third partition wall which connects the inner circumferential surface of the first partition wall to form one second space portion which is not in communication with the first space portion.

Hereinafter, a liquid crystal display device according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view schematically showing the structure of a film type liquid crystal display device according to an embodiment of the present invention.

As shown, the film type liquid crystal display device is formed by a band-shaped partition wall 14 having a predetermined height on the upper surface of the upper support plate 11 and the lower support plate 12 and the lower support plate 12 formed of a plurality of layers. The partition wall part 13 which forms the first and second space parts 15 and 16 is provided.

The lower support plate 12 is provided with a gas barrier layer 22 and a first coating layer 23 on the bottom surface of the plastic substrate 21, and an ITO electrode layer for driving the second coating layer 24 and the liquid crystal from the top surface of the plastic substrate 21. (25) is provided.

The plastic substrate 21 providing the support force is formed of a flexible synthetic resin such as polyester sulfon (PES), and the bottom of the gas barrier layer 22 is provided for the purpose of preventing moisture and other gas from entering. The first coating layer 23 is formed to prevent scratches and the like that are formed in the optical film. The second coating layer 24 is formed to facilitate the growth of the ITO electrode layer 25.

The upper support plate 11 also functions as the first coating layer 33, the gas barrier layer 32, the plastic substrate 31, the second coating layer 34, and the ITO electrode layer 35, which have the same function as the lower support plate 12. The ITO electrode layer 25 of the lower support plate 12 and the ITO electrode layer 35 of the upper support plate 11 are disposed to face each other.

The partition wall portion 13, which is a feature of the present invention, has two strips 14 of thin width w contacting each other to form two first and second space portions 15, 16. The heights of the barrier ribs 14 continuous in a band form are the same, and the inlets 17 and 18 provided in the spaces 15 and 16 become injection holes of the liquid crystal in the manufacturing process and are closed after the liquid crystal is injected.

The partition wall is provided with a first partition wall (a partition wall continuously formed between sections b) in which a plurality of square pulse shapes are periodically arranged, and second partition walls connecting the outer circumferential surface of the first partition wall at both side ends of the first partition wall. The second space portion is formed by the partition wall formed in section c, and the second space portion which is not in communication with the first space portion is formed by a third partition wall partition wall connecting the inner circumferential surface of the first partition wall. To form. The partition portions 13 formed as described above are set at intervals in which the widths t between the partition walls 14 parallel to each other correspond to pixels implementing one color.

The partition wall 13 having the structure as described above may produce the partition wall 14 having a small width w in the same manner as in photolithography. In addition, the partition 13 may be formed by etching a separate light transmitting photoresist layer, or may be formed using an inactive region other than the active region of the ITO thin film 25 used as an electrode.

When the liquid crystals in which dyes having different transmission colors are mixed are respectively injected into the first space portion 15 and the second space portion 16 formed by the barrier rib portion 13, they have different colors between the parallel barrier ribs 14. By arranging the liquid crystals alternately, dichroic colors can be displayed in units of pixels, and when the guest-host mode (GH mode) of the liquid crystal mixed with the dichroic dye is used, each space portion 15 16 can be implemented in two colors, and thus four colors can be implemented by the two space parts 15 and 16.

As such, the gap of the liquid crystal layer is kept constant by the same height of the barrier rib, thereby providing uniform display characteristics, and since liquid crystals having different colors are alternately arranged in pixel units, a desired color can be realized.

Although illustrated in the illustrated embodiment through a substrate made of a plastic material, the feature of the present invention is to implement the color using the partition wall 14 necessary for the gap control of the liquid crystal layer, so the same effect is obtained regardless of the type of substrate .

As described above, the liquid crystal display device according to the present invention is implemented as a color by a structure in which a liquid crystal having a different transmissive color is injected into a plurality of spaces formed by the partition wall, thereby providing a color filter layer that has been conventionally inserted to realize color. This is not necessary and the total thickness of the device is thus thinner.

Claims (3)

A lower support plate including an ITO electrode layer, a partition wall part having a strip-shaped partition wall having a predetermined height on an upper surface of the lower support plate, an upper support plate including an ITO electrode layer and provided on an upper surface of the partition wall part and supported by the partition wall, the upper support plate, and In the liquid crystal display device having a liquid crystal injected into the spaced space between the lower support plate, The partition portion A first partition wall in which a plurality of square pulse shapes are periodically arranged; Second barrier ribs forming one first space portion by connecting outer peripheral surfaces of the first barrier ribs at both side ends of the first barrier rib; And And a third partition wall which connects the inner circumferential surface of the first partition wall to form one second space part which is not in communication with the first space part. The method of claim 1, And a liquid crystal in which dyes of different colors are added to each of the first space portion and the second space portion are injected. The method of claim 1, The lower support plate and the upper support plate is a liquid crystal display device, characterized in that the ITO electrode layer is formed on a plastic substrate formed by stacking a plurality of flexible synthetic resin film.