JP2007171385A - Flat display device and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing a a liquid crystal panel by which UV sealing materials can efficiently be cured. <P>SOLUTION: The UV sealing materials 6 are laminated facing a frame layer 24. A photo conductive member 11 is provided between the UV sealing materials 24 provided across a dividing line 5 of a large-sized glass substrate 4, and ultraviolet light emitted from the side of a large-sized glass substrate 25 being a counter substrate 21 is reflected by the photo conductive member 11 to be guided to an end surface 6a of the UV sealing material 6. Thus, the end surface 6a of the UV sealing material 6 is irradiated with the ultraviolet light L and the UV sealing material 6 is uniformly cured with the ultraviolet light to stick the substrates together. A liquid crystal layer 29 can be prevented from being contaminated with the UV sealing material which is not cured and dissolved out into the liquid crystal layer 29. Even a liquid crystal panel 1 such that the frame layer 24 corresponds to a narrow frame can be manufactured in high yield with high quality. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a flat display device in which a first substrate and a second substrate are arranged to face each other, and a method for manufacturing the same.

  A liquid crystal display device as this type of flat display device is formed of two glass substrates having translucency. And when assembling these glass substrates, these glass substrates are bonded together by interposing a UV curable sealing material having ultraviolet (UV) curability between these glass substrates. However, in this bonding method, since a UV curable sealing material is used, in addition to shortening the lead time which is a manufacturing time, a liquid crystal is dropped on a region surrounded by the sealing material on the glass substrate and then the glass substrate. Can be used in combination with a liquid crystal dropping technique in which the film is bonded with a sealing material. Therefore, the process of sealing the liquid crystal can be efficiently performed, and there is no need to use a sealing material as the sealing material, so that there is an advantage that the manufacturing cost can be reduced. Therefore, it is possible to reduce the manufacturing cost and produce an inexpensive liquid crystal display device.

  On the other hand, the market demand is to increase the active area, which is the image display area between the glass substrates. This active area is provided with an active matrix circuit such as a thin film transistor. Then, the frame part covering this active area becomes narrow. Therefore, in a liquid crystal display device with a narrow frame portion, it is often necessary to form a UV curable sealant facing the lower layer of a black matrix having a light shielding property, and it is not easy to deal with a narrow frame product.

Also, in this type of liquid crystal display device, a UV curable sealing material is applied under the color filter layer laminated on the glass substrate, and ultraviolet rays are irradiated from the glass substrate on the side where the color filter layer is laminated. Then, a configuration is known in which the ultraviolet light is reflected by the inner surface of the glass substrate or the surface of the black matrix and incident on the UV curable sealing material to cure the UV curable sealing material (for example, Patent Documents). 1).
JP 2004-4563 A

  However, in the liquid crystal display device, when ultraviolet rays are irradiated from the glass substrate on which the color filter layer is laminated, the ultraviolet rays may be blocked by a black matrix or the like. Therefore, since it is not easy to efficiently make this ultraviolet ray incident on the UV curable sealing material, there is a problem that it is not easy to efficiently cure the UV curable sealing material.

  This invention is made | formed in view of such a point, and it aims at providing the flat display apparatus which can harden a seal | sticker part efficiently, and its manufacturing method.

  The present invention includes a first substrate, a plurality of display regions provided on the first substrate and covering at least a part of the first substrate, and a transparent substrate disposed opposite to the first substrate. A second substrate having optical properties, a plurality of light shielding portions provided between the first substrate and the second substrate and surrounding at least a part of the display region, the first substrate, and the light shielding portions A plurality of seal portions which are provided between the first substrate and the second substrate and surround the display area and have photo-curing properties, and the first substrate and the second substrate. And a light guide unit that guides light transmitted through one of the first substrate and the second substrate and enters the seal unit.

  According to the present invention, the light transmitted through the second substrate is guided by the light guide provided between the plurality of light shielding portions between the first substrate and the second substrate, and the first substrate And is incident on a seal portion provided between the light shielding portion. Accordingly, since the light transmitted through the second substrate can be efficiently incident on the seal portion, the seal portion can be efficiently cured.

  The configuration of the first embodiment of the liquid crystal display device of the present invention will be described below with reference to FIG. 1 and FIG.

  1 and 2, reference numeral 1 denotes a liquid crystal panel as a liquid crystal display device. The liquid crystal panel 1 is a liquid crystal display element as an active matrix type flat display device, and includes an array substrate 2 having a substantially rectangular flat plate shape. . The array substrate 2 has a glass substrate 3 that is an insulating substrate. The glass substrate 3 is a translucent substrate having a substantially transparent rectangular flat plate-like translucency. And this glass substrate 3 makes the large-sized glass substrate 4 which is a mother board | substrate as a rectangular flat plate-shaped 1st board | substrate corresponding to the magnitude | size of each glass substrate 3, and follows a longitudinal direction and the width direction. In this way, the substrate is divided by cutting along a dividing line 5 as a grid-like substrate cut line through a predetermined interval.

  Specifically, the large glass substrate 4 is a large plate-like light-transmitting substrate in which a plurality of glass substrates 3 are connected and faced along the longitudinal direction and the width direction. On the surface of the large glass substrate 4, a plurality of substantially endless UV seal materials 6, which are main seals as a seal portion, are applied to form a product seal pattern that is a chip seal pattern. These UV sealing materials 6 are configured to rim the outer peripheral edges of these glass substrates 3 in a state where the large glass substrate 4 is divided corresponding to each glass substrate 3. This is a bank pattern for receiving the liquid crystal composition 28 dropped in the enclosed region.

  That is, these UV sealing materials 6 are provided corresponding to the number of glass substrates 3 after the large glass substrate 4 is divided. Further, at least one of these UV sealing materials 6 is provided on the surface of the large glass substrate 4. Furthermore, these UV sealing materials 6 are formed in a substantially rectangular frame shape along the peripheral edges in the longitudinal direction and the width direction on the surface of each glass substrate 3. Therefore, the UV sealing material 6 is provided along each of an upper end edge that is one end edge in the longitudinal direction of the surface of each glass substrate 3 and both side edges in the width direction.

  Further, these UV sealing materials 6 are provided along the width direction of the glass substrates 3 at positions spaced inward by a predetermined distance from the lower end edge which is the other end edge in the longitudinal direction of the surface of each glass substrate 3. . The UV sealing material 6 is an ultraviolet light curable type having an ultraviolet curability as a photocurability that can be cured by being irradiated with ultraviolet light (UV light) L, which is ultraviolet light as light as a predetermined condition. Consists of materials.

  And the area | region inside each UV sealing material 6 on the surface of the large sized glass substrate 4 becomes the image display area 7 which can display an image. The image display area 7 covers at least a part of the area on the large glass substrate 4. Specifically, the image display area 7 is provided in an area surrounded by the UV sealant 6 on the large glass substrate 4. In the image display area 7, a plurality of signal lines and scanning lines (not shown) are arranged orthogonal to each other. In addition, a pixel (not shown) having a rectangular shape in plan view is provided in each of the regions partitioned by the signal lines and the scanning lines. These pixels are provided in a matrix in the image display area 7.

  Furthermore, each of these pixels is provided with a thin film transistor (TFT) (not shown) which is an active matrix element as a switching element, a pixel electrode whose driving is controlled by this thin film transistor, an auxiliary capacitor, and the like as one pixel constituent element. Yes. Here, the thin film transistor in each pixel is disposed in the vicinity of the intersection of the signal line and the scanning line. In addition, the pixel electrode in each pixel is arranged via a thin film transistor in the same pixel.

  In each image display area 7 on the large glass substrate 4, spacers 8 that keep the distance between the glass substrates 3 are stacked and provided. Furthermore, between each image display area 7 on the large glass substrate 4, a light guide 11 as a light guide that is a projection having an isosceles right triangle shape in cross section is provided. The light guide 11 is provided in a peripheral area 9 that is a specific area outside the image display area 7 on the large glass substrate 4.

  Further, the light guide 11 is formed in an elongated protrusion along the dividing line 5 of the large glass substrate 4, laminated on the dividing line 5, and provided across the dividing line 5. That is, the light guide 11 is a large glass with the central portion in the width direction of the light guide 11 positioned on the dividing line 5 and the longitudinal direction of the light guide 11 along the dividing line 5. It is laminated on the substrate 4. Furthermore, the light guide 11 has a length dimension equal to the length of the long side or the short side, which is one side of the image display region 7 provided on the large glass substrate 4.

  Specifically, the light guide 11 is provided by laminating a bottom surface 12 constituting a base of an isosceles triangle having a cross-sectional shape of the light guide 11 on the large glass substrate 4. Here, the bottom surface 12 of the light guide 11 has a width of about 10 μm, for example. Further, the light guide 11 has a height dimension of, for example, about 5 μm, and a pair of reflecting surfaces 13 and 14 as inclined surfaces provided on the bottom surface 12 of the light guide 11 are the bottom surface 12. For example, it is inclined at an angle of 45 °.

  Therefore, the light guide 11 guides the ultraviolet light L reflected by the reflecting surfaces 13 and 14 of the light guide 11 so that the ultraviolet light L is efficiently incident on the UV sealing material 6 and irradiated. Further, the light guide 11 is configured such that an angle between the pair of reflection surfaces 13 and 14 of the light guide 11 is, for example, 90 °, and a vertex portion 15 that is a connection portion of the reflection surfaces 13 and 14 includes: It is provided along the dividing line 5 so as to be positioned on the dividing line 5 of the large glass substrate 4.

  Here, the light guide 11 includes a main body portion 16 as a base having an isosceles triangular cross section. The main body 16 is made of the same resin material as the spacer 8 and is formed in the same process as the spacer 8. The pair of reflecting surfaces 13 and 14 of the main body 16 are formed by laminating a metal layer such as aluminum (Al) and coating the surface thereof and laminating a reflecting layer 17 as a reflecting film. The surfaces of these reflective layers 17 are configured as reflective surfaces 13 and 14.

  On the other hand, after the large glass substrate 4 is divided so as to correspond to the glass substrate 3 of each array substrate 2, the glass substrate 3 is arranged to face the side on which the UV sealant 6 is provided and is used as a counter electrode substrate. A counter substrate 21 which is a filter substrate is attached. The counter substrate 21 includes a rectangular flat glass substrate 22 having a width dimension equal to the width dimension of the glass substrate 3 of the array substrate 2 and having a longitudinal dimension slightly smaller than the longitudinal dimension of the glass substrate 3. On the surface which is one main surface of the glass substrate 22, a color filter layer 23 which is a rectangular flat colored layer is provided. The color filter layer 23 is formed in a size that covers the entire surface of the image display region 7 while facing the image display region 7 on the glass substrate 3 with the glass substrate 22 facing the glass substrate 3. ing.

  Further, on the color filter layer 23, a counter electrode (not shown) having a rectangular shape in plan view, which is a common electrode as a transparent electrode made of ITO (Indium-Tin Oxide), is laminated and oriented on the counter electrode. Films are stacked. The surface of the glass substrate 22 is bonded to the surface of the glass substrate 3 of the array substrate 2 with a UV sealing material 6 applied on the glass substrate 3 of the array substrate 2.

  Further, outside the color filter layer 23 on the surface of the glass substrate 22, a frame-shaped frame layer 24 is provided as a black matrix as a rectangular frame-shaped light-shielding portion that surrounds the color filter layer 23 and is peripheral. . The frame layer 24 has a width dimension larger than the width dimension of the UV sealing material 6 on the glass substrate 22. The frame layer 24 has a portion from the inner edge along the width direction of the frame layer 24 to approximately two thirds on the glass substrate 3 with the glass substrate 22 facing the glass substrate 3. Opposite to the laminated UV sealing material 6, it is bonded to this UV sealing material 6. That is, in the frame layer 24, with the glass substrate 22 facing the glass substrate 3, a substantially one third portion of the outer side along the width direction of the frame layer 24 is outside the UV sealing material 6. It is configured to protrude.

  The frame layer 24 is provided between the glass substrates 3 and 22 with the glass substrate 22 facing the glass substrate 3, and is provided so as to surround the image display region 7 between the glass substrates 3 and 22. It has been. Further, these frame layers 24 cover the outer periphery of the image display area 7, do not cover the dividing lines 5 between the image display areas 7, and are spaced apart at equal intervals around the dividing lines 5. Are stacked. Further, these frame layers 24 are positioned so as not to face the light guide 11 provided on the glass substrate 3 in a state where the glass substrate 22 faces the glass substrate 3 and avoid the light guide 11. Is provided. That is, the frame layer 24 is configured such that light irradiated from the back side of the glass substrate 22 is irradiated to the reflecting surfaces 13 and 14 of the light guide 11. In other words, the frame layers 24 are provided so that the light guide 11 is located between the frame layers 24.

  Then, the glass substrate 22 has a large glass substrate 25 in a large plate state, which is a mother substrate as a second substrate, with a predetermined interval along the longitudinal direction and the width direction corresponding to the size of each counter substrate 21. It is formed by cutting along a dividing line 26 as a grid-like substrate cut line. Here, the dividing line 26 is formed to face the dividing line 5 of the large glass substrate 4 in a state where the large glass substrate 25 is laminated on the large glass substrate 4. Further, the large glass substrate 25 is a large plate-like light-transmitting substrate in which a plurality of glass substrates 22 are connected in the longitudinal direction and the width direction and faced. And these large sized glass substrates 4 and 25 are bonded together by the UV sealing material 6, and are positioned.

  Further, in a state where the glass substrate 3 of the array substrate 2 and the glass substrate 22 of the counter substrate 21 are bonded and bonded together by the UV sealing material 6, the UV sealing material 6 is a gap between the glass substrates 3 and 22. The inner area is sealed with the UV sealant 6. A region between the glass substrates 3 and 22 sealed with the UV sealing material 6 becomes a liquid crystal sealing region 27. In this liquid crystal sealing region 27, a liquid crystal composition 28 as a liquid crystal material is injected and sandwiched to form a liquid crystal layer 29 as a light modulation layer. The liquid crystal layer 29 is provided in a liquid crystal sealing region 27 between the alignment film on the glass substrate 3 of the array substrate 2 and the alignment film on the glass substrate 22 of the counter substrate 21.

  Next, a method for manufacturing the liquid crystal display device according to the first embodiment will be described.

  First, a film forming process and a patterning process are repeated to provide a plurality of pixels in each of the image display areas 7 on the surface of the large glass substrate 4 and a spacer 8 on each pixel of the image display areas 7. And the main body 16 of the light guide 11 are laminated in the same material and in the same process.

  Thereafter, a reflective layer 17 is formed by laminating a metal layer such as aluminum (Al) on the surface of each of the main body portions 16 of the light guide 11.

  Then, a UV sealant 6 is applied on the large glass substrate 4 so as to surround each image display region 7 on the large glass substrate 4 to form a product seal pattern.

  Next, in a state where the surface of each large-sized glass substrate 4 coated with each UV sealing material 6 is directed upward, each of the regions covered with the respective UV sealing materials 6 on this large-sized glass substrate 4 is used. Then, the liquid crystal composition 28 is dropped.

  Then, the large glass substrate 4 is transported into a bonding apparatus (not shown), and the surface of the large glass substrate 25 having the counter electrode laminated on the surface thereof is aligned with the surface of the large glass substrate 4, ie, alignment. Align.

  Thereafter, the surfaces of the large glass substrates 4 and 25 are overlapped with each other through the UV sealing material 6 from the aligned state.

  In this state, the ultraviolet light L is uniformly irradiated from the large glass substrate 25 side toward the back surface of the large glass substrate 25.

  At this time, the ultraviolet light L irradiated to the back surface of the large glass substrate 25 is uniformly and uniformly irradiated on the surface of the large glass substrate 25, and the frame laminated on the surface of the large glass substrate 25. Blocked by layer 24. Further, the ultraviolet light L that has passed between the frame layers 24 laminated on the surface of the large glass substrate 25 is irradiated to the reflecting surfaces 13 and 14 of the light guide 11 provided between the frame layers 24. Is reached.

  Then, the ultraviolet light L applied to the reflecting surfaces 13 and 14 of the light guide 11 is bent by about 90 ° at the reflecting surfaces 13 and 14 of the light guide 11 and directed in the left-right direction. Reflected horizontally, passing horizontally between the surface of the frame layer 24 and the surface of the large glass substrate 4, and turning toward the end surface 6a of the UV sealing material 6 laminated below the frame layer 24. And efficiently irradiated.

  Therefore, the UV sealing material 6 is uniformly UV-cured and the large glass substrates 4 and 25 are bonded together via the UV sealing material 6.

  Thereafter, the bonded large glass substrates 4 and 25 are discharged from the bonding apparatus and transported, and then each of the large glass substrates 4 and 25 is divided along the dividing lines 5 and 26 to obtain a plurality of pieces. A plurality of liquid crystal panels 1 are used as the array substrate 2 and the counter substrate 21.

  As a result, the liquid crystal panel 1 was confirmed. As a result, bubbles were mixed into the liquid crystal sealing regions 27 of a plurality of, for example, 72 liquid crystal panels 1, the UV sealing material 6 was peeled off, and the liquid crystal composition 28 from the liquid crystal layer 29 was removed. There was no defect such as leakage or jumping out.

  At this time, the light guide 11 is not provided between the UV sealing materials 6 on the large glass substrate 4 serving as the array substrate 2 but below the frame layer 24 laminated on the surface of the large glass substrate 25 serving as the counter substrate. In the case of a comparative example in which the UV sealing material 6 is applied and the ultraviolet light L is irradiated from the large glass substrate 25 side, 65 liquid crystal panels 1 out of 72 liquid crystal panels 1, that is, a defective rate 90 %, Bubble defects occurred in the liquid crystal sealing region 27 of the liquid crystal panel 1 due to the rupture of the UV sealing material 6.

  Here, when the image display area 7 of the liquid crystal panel 1 is enlarged, the frame layer 24 formed on the periphery of the image display area 7 must be narrowed unless the glass substrates 3 and 22 are enlarged. In the liquid crystal panel 1 in which the frame layer 24 is narrowed, the UV sealing material 6 often has to be formed on the lower side of the frame layer 24, and the production of the narrow frame liquid crystal panel 1 is not easy.

  Further, a UV sealant 6 is applied under the frame layer 24 formed on the surface of the large glass substrate 25 on the side that becomes the counter substrate 21 of the liquid crystal panel 1, and the side that becomes the array substrate 2 of the liquid crystal panel 1. When the ultraviolet light L is irradiated from the large glass substrate 4 side, the characteristics of the active matrix element circuit such as a thin film transistor provided in each pixel on the large glass substrate 4 are deteriorated by the irradiation of the ultraviolet light L. Therefore, it is not easy to manufacture the liquid crystal panel 1 corresponding to a narrow frame product.

  Therefore, as in the first embodiment described above, the UV sealing material 6 laminated between the frame layers 24 straddling the dividing lines 5 of the large glass substrate 4 of the liquid crystal panel 1 so as to face the frame layers 24 is used. The light guide 11 that reflects and guides the ultraviolet light L is provided. As a result, when the ultraviolet light L is irradiated from the side of the large glass substrate 25 serving as the counter substrate 21, the ultraviolet light L transmitted through the frame layer 24 laminated on the large glass substrate 25 is converted into these frame layers. The UV sealing material provided between the frame layer 24 and the large glass substrate 4 on the side that becomes the array substrate 2 by being reflected by the respective reflecting surfaces 13 and 14 of the light guide 11 provided between 24 6 is irradiated with ultraviolet light L.

  Accordingly, the UV sealing material 6 is uniformly UV-cured by irradiation of the ultraviolet light L onto the end surface 6a of the UV sealing material 6, and the large glass substrates 4 and 25 are bonded together by the UV sealing material 6. . Therefore, contamination of the liquid crystal layer 29 due to the UV sealing material 6 being melted into the liquid crystal layer 29 without completely curing the UV sealing material 6 can be prevented. Therefore, even if the frame layer 24 is a liquid crystal panel 1 corresponding to a narrow narrow frame, the production of the liquid crystal panel 1 with a high yield and high quality can be facilitated. Yield can be improved. Therefore, it is possible to provide a product design and product configuration for efficiently assembling the liquid crystal panel 1.

  Further, each of the reflection surfaces 13 and 14 of the light guide 11 is formed as an inclined surface inclined by 45 ° with respect to the surface of the large glass substrate 4, so that the frame layer 24 stacked on the large glass substrate 25 is interposed between the frame layers 24. Since the optical path of the transmitted ultraviolet light L can be reflected at right angles by the reflecting surfaces 13 and 14 of the light guide 11, the ultraviolet light L can be efficiently irradiated onto the end surface 6 a of the UV sealing material 6.

  In the first embodiment, the light guide 11 having an isosceles triangle cross section is formed in the peripheral region 9 between the UV sealing materials 6 of the large glass substrate 4 to be the array substrate 2 as shown in FIG. As in the second embodiment, a light guide 11 having a trapezoidal cross section in which a portion located on the dividing line 5 of the large glass substrate 4 is flattened can be used. In this case, the light guide 11 has an elongated strip-shaped main body portion 16 having a trapezoidal cross section.

  And this main-body part 16 is provided ranging over the division line 5 of the large sized glass substrate 4, for example, has a width dimension of 0.1 mm and a height dimension of 5 micrometers. Further, the main body 16 is formed such that the angle formed between the bottom surface 12 of the main body portion 16 and the reflecting surfaces 13 and 14 which are both side surfaces continuous to the bottom surface 12 is 45 °, for example. An upper surface facing the bottom surface 12 of the main body 16 and positioned between the reflecting surfaces 13 and 14 is formed on a flat surface 31 parallel to the bottom surface 13.

  Specifically, the flat surface 31 is provided so as to be located on the central portion of the bottom surface 12 of the main body portion 16. In other words, the angles formed by the flat surface 31 and the reflecting surfaces 13 and 14 are equal. The flat surface 31 is provided such that the central portion in the width direction of the flat surface 31 is positioned on the dividing line 5 of the large glass substrate 4. That is, the flat surface 31 is provided on the dividing line 5 in a state where the longitudinal direction of the flat surface 31 is along the dividing line 5 of the large glass substrate 4. Further, the light guide 11 has a height from the flat surface 31 to the bottom surface 12 of the light guide 11 after the large glass substrate 4 and the large glass substrate 25 are bonded together with the UV sealant 6. It is formed to be equal to the width of the cell gap G, which is the gap between the large glass substrate 4 and the large glass substrate 25.

  As a result, when the ultraviolet light L is irradiated from the large glass substrate 25 side on the side to be the counter substrate 21, the ultraviolet light L transmitted through the frame layers 24 of the large glass substrate 25 is between these frame layers 24. Since the light is reflected by the reflecting surfaces 13 and 14 of the light guide 11 positioned, the ultraviolet light L is applied to the end surface 6a of the UV sealing material 6 between the large glass substrate 4 and the frame layer 24. The same effect as the first embodiment can be obtained.

  Furthermore, when the light guide 11 laminated on the large glass substrate 4 has a trapezoidal cross section, the large glass substrate 4 is laminated on the large glass substrate 4 when the large glass substrate 4 is divided along the dividing line 5. The light guide 11 is divided along the flat surface 31 of the light guide 11. Therefore, the possibility of chipping of the large glass substrate 4 and generation of foreign matters due to the presence of the light guide 11 on the dividing line 5 of the large glass substrate 4 can be suppressed. Therefore, the large glass substrate 4 can be easily divided along the dividing line 5 and the large glass substrate 4 can be divided more accurately along the dividing line 5 with a high yield. It can be improved.

  Further, as in the third embodiment shown in FIG. 4, a portion of the large glass substrate 4 located on the dividing line 5 is removed, and a pair of light guides 11 are placed at positions avoiding the dividing line 5. It can also be set as the structure provided. In this case, the pair of light guides 11 are provided at positions separated from the dividing line 5 of the large glass substrate 4 by a predetermined distance in a direction orthogonal to the dividing line 5. And these light guides 11 are installed in a state in which the reflecting surfaces 13 and 14 face each other, and the reflecting surfaces 13 and 14 face each other on the side of the end face 6a of the UV sealing material 6 facing each other. It is provided on the large glass substrate 4 in a positioned state.

  Specifically, these light guides 11 have a height dimension of about 5 μm, for example, and are formed in an isosceles triangle shape having a right-angle cross section having one side surface orthogonal to the bottom surface 12. That is, these light guides 11 are formed with the reflecting surfaces 13, 14 having an angle with the bottom surface 12 of, for example, about 45 ° as slopes. That is, the reflecting surfaces 13 and 14 of the respective light guides 11 reflect the ultraviolet light L irradiated from the large glass substrate 25 side, and irradiate the end surface 6 a of the UV sealing material 6 with the ultraviolet light L.

  As a result, when the ultraviolet light L is irradiated from the large glass substrate 25 side on the side to be the counter substrate 21, the ultraviolet light L transmitted through the frame layers 24 of the large glass substrate 25 is between these frame layers 24. Reflected by the reflecting surfaces 13 and 14 of the pair of light guides 11 positioned, the ultraviolet light L is applied to the end surface 6a of the UV sealing material 6 between the large glass substrate 4 and the frame layer 24. Therefore, the same effect as the first embodiment can be obtained.

  Further, by removing a portion located on the dividing line 5 of the large glass substrate 4 and providing a pair of light guiding bodies 11 at positions avoiding the dividing line 5, the light guiding bodies 11 can be divided. The large glass substrate 4 can be divided along the dividing line 5 without cutting. For this reason, since the large glass substrate 4 can be divided | segmented along the division line 5 between these light guides 11, this large glass substrate by the presence of the light guide 11 on the division line 5 of the large glass substrate 4 is shown. The possibility of chipping of 4 or the generation of foreign matter can be reliably prevented. Therefore, the large glass substrate 4 can be easily divided along the dividing line 5 and the large glass substrate 4 can be divided more accurately and with high yield along the dividing line 5, thereby improving the productivity of the liquid crystal panel 1. it can.

  In each of the above embodiments, the light guide 11 is provided in the peripheral region 9 between the image display regions 7 of the large glass substrate 4. However, as in the fourth embodiment shown in FIG. The light guide 11 can also be provided in the image display region 7 on the top 4. In this case, the ultraviolet light L irradiated from the side of the large glass substrate 25 on the side serving as the counter substrate 21 is reflected by the reflecting surfaces 13 and 14 of the pair of light guides 11 and irradiated to the end surface 6a of the UV sealant 6. Therefore, the same effects as those in the first embodiment can be obtained.

  At the same time, since the light guide 11 is provided in the image display area 7 on the large glass substrate 4, when the large glass substrate 4 is divided along the dividing line 5 corresponding to the image display area 7, The large glass substrate 4 can be divided without dividing each light guide 11 on the large glass substrate 4. Therefore, the large glass substrate 4 can be easily divided along the dividing line 5 and the large glass substrate 4 can be divided more accurately and with high yield along the dividing line 5, thereby improving the productivity of the liquid crystal panel 1. it can.

  Further, although the main body 16 of the light guide 11 is formed by the same material and the same process as the spacer 8, the main body 16 of the light guide 11 can be formed of a material different from the spacer 8, and the array It is also possible to form the body portion 16 and the reflective layer 17 of the light guide 11 in the same process as this layer, using a material constituting any layer formed on the substrate 2.

  Further, the ultraviolet light L transmitted through the large glass substrate 25 on the side serving as the counter substrate 21 is reflected by the reflecting surfaces 13 and 14 of the light guide 11 and irradiated to the end surface 6a of the UV sealing material 6. As long as the ultraviolet light L transmitted through the large glass substrate 25 on the side serving as the counter substrate 21 can be guided and irradiated toward the end surface 6a of the UV sealing material 6, the light guide 11 having a prism mechanism, etc. Alternatively, even the light guide 11 having only the reflective layer 17 can be used correspondingly.

  Furthermore, although the liquid crystal panel 1 having the liquid crystal layer 29 as the light modulation layer between the array substrate 2 and the counter substrate 21 has been described, for example, an organic EL panel using an organic EL (electroluminescence) layer as the light modulation layer, etc. Even a flat display device in which a display region is formed between a pair of substrates can be used correspondingly.

It is explanatory sectional drawing which shows 1st Embodiment of the flat display apparatus of this invention. It is explanatory drawing which shows a part of flat display apparatus same as the above. It is explanatory sectional drawing which shows 2nd Embodiment of the flat display apparatus of this invention. It is explanatory sectional drawing which shows 3rd Embodiment of the flat display apparatus of this invention. It is explanatory sectional drawing which shows 4th Embodiment of the flat display apparatus of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal panel as flat display device 4 Large glass substrate as 1st board | substrate 5 Dividing line 6 UV sealing material as a seal part 7 Image display area as a display area 8 Spacer
11 Light guide as light guide
16 Main body as base
17 Reflective layer
24 Frame layer as a shading part
25 Large glass substrate as second substrate

Claims (5)

A first substrate;
A plurality of display areas provided on the first substrate and covering at least a part of the first substrate;
A second substrate disposed opposite to the first substrate and having translucency;
A plurality of light-shielding portions provided between the first substrate and the second substrate and surrounding at least a part of the display region;
A plurality of seal portions which are provided between the first substrate and the light-shielding portion and enclose the display region and seal between the first substrate and the second substrate and have photocurability;
Light that is provided between a plurality of light shielding portions between the first substrate and the second substrate and that has passed through one of the first substrate and the second substrate is guided and incident on the seal portion. A flat display device comprising: a light guide portion. Comprising a dividing line provided on each of the first substrate and the second substrate between a plurality of display areas;
The flat display device according to claim 1, wherein the light guide unit is provided across the dividing line. Comprising a dividing line provided on each of the first substrate and the second substrate between a plurality of display areas;
The flat display device according to claim 1, wherein the light guide unit is provided to avoid a position facing the dividing line. Provided with a spacer provided between the first substrate and the second substrate and maintaining a distance between the first substrate and the second substrate;
The light guide section includes a base formed of the same material as the spacer, and a reflective layer provided on the base and reflecting incident light toward the seal section. 3. The flat display device according to any one of 3. A first substrate;
A plurality of display areas provided on the first substrate and covering at least a part of the first substrate;
A second substrate disposed opposite to the first substrate and having translucency;
A plurality of light-shielding portions provided between the first substrate and the second substrate and surrounding at least a part of the display region;
A plurality of seal portions that are provided between the first substrate and the light-shielding portion and seal between the first substrate and the second substrate surrounding the display area and have photo-curing properties;
Light that is provided between a plurality of light shielding portions between the first substrate and the second substrate and that has passed through at least one of the first substrate and the second substrate is guided and incident on the seal portion. A light guiding section,
A spacer that is provided between the first substrate and the second substrate and maintains a distance between the first substrate and the second substrate;
The light guide unit is a method of manufacturing a flat display device including a base and a reflective layer that is provided on the base and reflects incident light toward the seal part,
A method of manufacturing a flat display device, wherein the base of the light guide unit is formed in the same step as the spacer.

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