JPH078836U - Color liquid crystal display - Google Patents

Abstract

(57) [Abstract] [Purpose] A high-quality and highly reliable color liquid crystal display device in which there is no unevenness in the distance between substrates can be provided. [Structure] A light-shielding film having a predetermined pattern is formed on a transparent substrate, a color filter having a predetermined shape and an insulating layer are covered on the light-shielding film, and stripe-shaped transparent electrodes are arranged on the insulating layer. When one member and the other member in which stripe-shaped transparent electrodes are arranged on a transparent substrate are bonded to each other via a liquid crystal to form a display region, a light-shielding member is provided over the outer periphery of the display region on the one member. In the provided color liquid crystal display device, a light transmitting portion was formed on a part of the light shielding member.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a color liquid crystal display device in which a light shielding member is provided on the outer periphery of a display area.

[0002]

[Prior art]

 A color liquid crystal display device using a color filter has been proposed. In this color liquid crystal display device, a photosensitive colored resin containing pigments such as red, green, and blue is applied on a transparent substrate, and a photolithography technique is used. It is manufactured by the technique of forming fine color filters in a grid pattern, and this technique is usually called the "pigment dispersion method". (See JP-A-58-102976).

A method of manufacturing a color filter in this color liquid crystal display device will be described with reference to FIGS. In FIG. 4, reference numeral 1 is a transparent substrate such as glass, and a light shielding film 2 such as metallic chromium is formed on this transparent substrate 1 by vacuum evaporation, sputtering or the like. This light-shielding film 2 is formed in a lattice shape, and each lattice thereof corresponds to an individual pixel.

Next, as shown in FIG. 5, for example, a photosensitive resin 3 in which a red pigment is dispersed is applied to the entire surface by printing or spin coating, and exposed through a mask 4. 5 is formed.

Further, when this process is repeated for other pixels of green and blue, respectively, a green pixel 6 and a blue pixel 7 are formed as shown in FIG.

Further, as shown in FIG. 8, in order to flatten the unevenness due to each pixel 5, 6, 7, an acrylic resin 8 or the like is applied, and a transparent electrode 9 is formed on the resin layer 8. , One of the liquid crystal display substrates.

In this way, one liquid crystal display substrate and the other liquid crystal display substrate formed by similarly forming transparent electrodes on the transparent substrate are bonded together via the liquid crystal to form a display region.

Further, in the color liquid crystal display device having the above structure, a color filter and a light shielding film are further formed so as to surround the outer periphery of the display region, thereby making the cell gap uniform and preventing light leakage from the outer periphery of the display region. It has been proposed to prevent it (see JP-A-1-299917 and JP-A-2-287429).

FIG. 3 is a plan view of the color liquid crystal display device 10 formed so as to surround the light-shielding film on the outer periphery of the display region. In FIG. 3, 11 is a display region and 12 is an outer periphery of the display region 11. It is a light-shielding film.

[0010]

[Problems to be solved by the device]

 In the case of the color liquid crystal display device having the above configuration, particularly in the case of the STN type display device, it is necessary to strictly set the substrate interval, and if the interval is uneven, the display screen becomes uneven.

However, the above-proposed color liquid crystal display device 10 has a problem that the substrate distance cannot be accurately measured due to the light shielding film 12 formed on the outer periphery of the display region 11.

That is, the distance between the substrates is measured by using a birefringence phase difference measuring device to make a specific light incident on the substrate and measuring the phase difference between the light and the outgoing light passing through the device. In this color liquid crystal display device 10, it is impossible to measure due to the light-shielding film 12, and therefore, the spacer existing in the seal on the outer periphery of the display area 11 and the spacer existing inside the display area 11 are matched. This was not possible, and as a result, the spacing between the substrates was uneven.

[0013]

[Means for solving problems]

 In the color liquid crystal display device of the present invention, a light-shielding film having a predetermined pattern is formed on a transparent substrate, a color filter having a predetermined shape and an insulating layer are coated on the light-shielding film, and a stripe-shaped transparent film is formed on the insulating layer. The display area on one member is formed by bonding one member with the electrodes arranged and the other member with the striped transparent electrodes arranged on the transparent substrate through the liquid crystal to form the display area. A light-shielding member is provided over the outer periphery of the, and a light-transmitting portion is formed in a part of the light-shielding member.

[0014]

[Action]

 In the case of the color liquid crystal display device having the above-mentioned configuration, the light-transmitting portion is formed on a part of the light-shielding member provided over the outer periphery of the display area, and thus the light-transmitting portion is formed by using the birefringence phase difference measuring device. The distance between the substrates can be measured even in the light section, and therefore, the spacer existing inside the seal on the outer periphery of the display area can be more effectively matched with the spacer existing inside the display area. The spacing is uniform.

[0015]

【Example】

 Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a plan view of a color liquid crystal display device 13 of this embodiment, in which 14 is a display region, 15 is a light-shielding film formed on the outer periphery of the display region 14, and 16 is a light-transmitting portion formed on the light-shielding film 15. Is. FIG. 2 is an enlarged view of a main part near the light transmitting portion 16.

First, a method of manufacturing the color liquid crystal display device 13 will be described. A thin metal film of Cr was formed on a previously cleaned transparent substrate by sputtering to a thickness of 1000 A, and a grid pattern was formed by photolithography to form a light shielding film. After forming this light-shielding film, a color filter pattern (red, green, blue) with a film thickness of about 1.8 μm is formed by a photolithography process, and a protective film layer of a photosensitive acrylic resin is formed on this with a thickness of about 2 μm. It was stacked. Next, a transparent conductive film was formed on this substrate with a thickness of 2000 A by a sputtering method. The transparent conductive film on the color filter thus obtained was patterned in a stripe shape by a photolithography process to form a transparent electrode. The pixel pitch of this color filter was 0.3 mm, and the line width of the transparent electrode was 275 μm. As a substrate on the opposite side, a transparent conductive film was formed on a transparent substrate with a thickness of 2000 A, and then a stripe pattern was similarly formed by a photolithography process. These two substrates were opposed to each other, the peripheral portion was sealed, and liquid crystal was injected to obtain a color liquid crystal display device.

In the present embodiment, when forming the light shielding film, the light shielding film 15 having the light transmitting portion 16 was also formed at the same time. The light-transmitting portion 16 is linearly provided in the display area 14 along each side, and has a width of 0.6 mm. The transparent portion 16 is formed by forming the same color filter pattern (red, green, blue) at the same time as forming the same pattern. However, no transparent electrode is formed in this region. Further, a ▲ -shaped marker 17 was also provided on the outer side of each light transmitting portion 16 at the same time when the light shielding film was formed.

According to the color liquid crystal display device thus obtained, the marker 17 is first visually confirmed during the manufacturing process, and the birefringence phase difference measuring device (RETS-manufactured by Otsuka Electronics Co., Ltd.) is placed at the measurement position. 2000) was set, and while observing the microscope of this apparatus, the light transmitting part 16 was aligned and the substrate interval could be measured. Therefore, the matching between the spacer existing inside the seal on the outer periphery of the display area 14 and the spacer existing inside the display area can be made more effective.

The present invention is not limited to the above-described embodiments, and various modifications and improvements may be made without departing from the scope of the present invention.

[0020]

[Effect of device]

 As described above, according to the color liquid crystal display device of the present invention, the light-transmitting portion is formed on a part of the light-shielding member provided over the outer periphery of the display area, whereby the birefringence phase difference measurement is performed. The device can also be used to measure the substrate spacing even in the light-transmitting part, so that the spacer existing in the seal on the outer periphery of the display area can be matched with the spacer existing inside the display area. Since it can be made more effective, there is no unevenness in the substrate spacing, and as a result, a high quality and highly reliable color liquid crystal display device has been provided.

[Brief description of drawings]

FIG. 1 is a plan view of a color liquid crystal display device of an example.

FIG. 2 is an enlarged view of a main part of a color liquid crystal display device of an example.

FIG. 3 is a plan view of a conventional color liquid crystal display device.

FIG. 4 is a process drawing of a color liquid crystal display device.

FIG. 5 is a process drawing of a color liquid crystal display device.

FIG. 6 is a process drawing of a color liquid crystal display device.

FIG. 7 is a process drawing of a color liquid crystal display device.

FIG. 8 is a process drawing of a color liquid crystal display device.

[Explanation of symbols]

 13 color liquid crystal display device 14 display area 15 light-shielding film 16 translucent part

Claims (1)

[Scope of utility model registration request] 1. A light-shielding film having a predetermined pattern is formed on a transparent substrate, a color filter having a predetermined shape and an insulating layer are coated on the light-shielding film, and stripe-shaped transparent electrodes are arranged on the insulating layer. And one member formed by arranging stripe-shaped transparent electrodes on a transparent substrate are bonded to each other via a liquid crystal to form a display region, and a light-shielding property is provided over the outer periphery of the display region on the one member. A color liquid crystal display device provided with a member, wherein a light transmitting portion is formed in a part of the light shielding member.