JP2008151969A - Liquid crystal display panel, electronic apparatus including the same, and method for manufacturing liquid crystal display panel - Google Patents

Abstract

A liquid crystal display panel having a narrow frame, an electronic device including the same, and a method for manufacturing the liquid crystal display panel are provided.
A liquid crystal display panel according to the present invention includes a CF substrate 2 and a TFT substrate which are arranged to face each other, a liquid crystal sandwiched in a gap between the two substrates, and the two substrates. In the liquid crystal display panel 1, which includes a sealing material 4 formed in a shape surrounding the liquid crystal sealing region in the gap and an external connection terminal 3 along at least one side of the peripheral edge of the CF substrate 2. The width of the external connection terminal side sealing material 4a, which is the sealing material portion along the peripheral edge of the CF substrate 2 along which the connection terminals 3 are aligned, is the width of the CF substrate 2 where the external connection terminals 3 are not formed. It is characterized by being wider than the width of the peripheral edge side sealing material 4b of at least one side along the peripheral edge.
[Selection] Figure 1

Description

  The present invention relates to a liquid crystal display panel, an electronic device including the same, and a method for manufacturing the liquid crystal display panel, and more particularly to a liquid crystal display panel having a narrow frame structure, an electronic device including the same, and a method for manufacturing the liquid crystal display panel.

  In general, a liquid crystal display panel has a structure in which two glass substrates are overlapped and bonded in parallel with a certain minute gap interposed therebetween, and liquid crystal is filled in the gap. A sealing material is provided around the liquid crystal so as to surround a region where the liquid crystal is sealed. In addition, an external connection terminal for connecting to the outside is provided on the peripheral portion of the substrate.

  One of the substrates is a substrate in which pixel electrodes are arranged in a matrix, and the other is provided with color filters and common electrodes in which red, green, and blue are arranged so as to correspond to the pixel electrodes. A frame-shaped sealing material is formed in the gap between the two substrates so as to surround the active area, and the inside of the sealing material is filled with liquid crystal. The sealing material has a width of about 1 mm, and has a peel strength of several MPa so that the sealing material does not peel when the external connection terminal warps.

  Such liquid crystal display panels are used in mobile devices such as mobile phone devices, portable information terminal devices, and portable game devices. Mobile devices are strongly required to expand the pixel area with respect to the liquid crystal display panel from the viewpoint of easy portability and miniaturization and thinning. In order to achieve such enlargement of the pixel area with respect to the liquid crystal display panel, it is necessary to make the outer portion of the liquid crystal display area as narrow as possible. That is, it is necessary to narrow the frame of the liquid crystal display panel.

As such a technique, Patent Document 1 discloses a manufacturing method in which a sealing material is disposed along at least one peripheral edge portion of a substrate base material. According to the manufacturing method of Patent Document 1, it is possible to reduce a useless area outside at least one peripheral edge portion of the sealing material, and to realize a narrow frame of the liquid crystal display panel.
JP 2001-75064 A (published March 23, 2001)

  However, the above-described conventional method for manufacturing a liquid crystal display panel has a problem that it is insufficient for realizing a narrower frame.

  Specifically, in recent years, there has been a demand for further narrowing of the frame of a liquid crystal display panel without stopping downsizing and weight reduction of portable devices and the like. However, according to the manufacturing method of Patent Document 1, although the narrow frame of the liquid crystal display panel can be realized, the region of the sealing material is not taken into consideration, and further narrowing of the frame cannot be realized.

  The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a narrowed liquid crystal display panel, an electronic apparatus including the same, and a method for manufacturing the liquid crystal display panel.

  As a result of intensive studies, the inventors of the present invention have found that by narrowing the width of the sealing material of the liquid crystal display panel, a liquid crystal display panel with a narrow frame can be provided, and the present invention has been completed.

In order to solve the above problems, the liquid crystal display panel of the present application has two substrates disposed opposite to each other, a liquid crystal sandwiched in a gap between the two substrates, and a gap between the two substrates. In addition, in a liquid crystal display panel comprising a sealing material formed in a shape surrounding a region enclosing a liquid crystal, and an external connection terminal along at least one side of the peripheral edge of the substrate,
The width of the external connection terminal side sealing material, which is the sealing material portion along the peripheral edge of the substrate along which the external connection terminals are aligned, is along the peripheral edge of the substrate where the external connection terminals are not formed. It is characterized in that it is wider than the width of the peripheral side sealing material of at least one side which is the sealing material portion.

  According to the above invention, since the width of the external connection terminal side sealing material is wider than the width of the peripheral edge side sealing material, a liquid crystal display panel narrowed by the width of the peripheral edge side sealing material is provided. can do. Further, the external connection terminal side sealing material tends to be peeled off particularly because heat and pressure are applied thereto, but the external connection terminal side sealing material is not set narrowly, so there is no possibility of deteriorating the peeling strength. Therefore, the reliability regarding the peeling strength of the external connection terminal side sealing material can be ensured.

  In the liquid crystal display panel of the present invention, it is preferable that the width of the peripheral edge side sealing material is 1 mm or less.

  This makes it possible to provide a liquid crystal display panel with a narrower frame.

  According to another aspect of the present invention, there is provided an electronic apparatus including the above-described liquid crystal display panel.

  Thereby, since the said liquid crystal display panel is made into the narrow frame, the electronic device reduced in size can be provided.

  In the method for manufacturing a liquid crystal display panel according to the present invention, two substrates are arranged to face each other, a liquid crystal is sealed in a gap between the two substrates, and an external portion along at least one side of the peripheral edge of the substrate. A method of manufacturing a liquid crystal display panel comprising a connection terminal, comprising: a sealing material forming step of forming a sealing material on at least one of the two substrates in a shape surrounding a region in which liquid crystal is enclosed; In the material forming step, the width of the external connection terminal side sealing material, which is the seal material portion along the peripheral edge of the substrate along which the external connection terminal is aligned, is set to the width of the substrate on which the external connection terminal is not formed. It is characterized by being formed wider than the width of the peripheral edge side sealing material of at least one side which is a sealing material portion along the peripheral edge.

  According to the above invention, since the width of the external connection terminal side sealing material is wider than the width of the peripheral edge side sealing material, a liquid crystal display panel narrowed by the width of the peripheral edge side sealing material is manufactured. can do. Further, the external connection terminal side sealing material tends to be peeled off particularly because heat and pressure are applied thereto, but the external connection terminal side sealing material is not set narrowly, so there is no possibility of deteriorating the peeling strength. Therefore, it is possible to manufacture a liquid crystal display panel that ensures the reliability related to the peel strength of the external connection terminal side sealing material.

  Moreover, in the manufacturing method of the liquid crystal display panel of this invention, it is preferable to form the width | variety of the said peripheral part side sealing material in 1 mm or less in the said sealing material formation process.

  This makes it possible to manufacture a liquid crystal display panel with a narrower frame.

  In the liquid crystal display panel manufacturing method of the present invention, in the sealing material forming step, a part of the external connection terminal side sealing material is formed using a dispenser, and a part of the external connection terminal side sealing material is formed. It is preferable to form the external connection terminal side sealing material by further forming a part of the external connection terminal side sealing material at a position along the line.

  According to the above manufacturing method, a liquid crystal display panel having a width wider than at least one side of the peripheral edge side sealing material is narrowed using a dispenser, that is, the frame is narrowed. The liquid crystal display panel can be easily manufactured.

  Further, in the method for producing a liquid crystal display panel of the present invention, at least one before and after the sealing material forming step, a dispenser is used and outside the region of the external connection terminal side sealing material and the peripheral edge side sealing material. Preferably, the method further includes a raw material discharge step of discharging a predetermined amount of the raw material of the sealing material, and discharging the raw material of the sealing material by the dispenser in the sealing material forming step and the raw material discharge step is preferably performed continuously.

  In the case of using a dispenser, there is a problem that the width of the sealing material cannot be stably formed because the amount of the raw material of the sealing material injected at the start of discharge and at the end of discharge tends to fluctuate. According to the above manufacturing method, at least one before and after the sealing material forming step includes a raw material discharging step, and the discharge of the sealing material by the dispenser in the sealing material forming step and the raw material discharging step is performed. Since it is performed continuously, the widths of the external connection terminal side sealing material and the peripheral edge side sealing material can be stably formed.

  In the method for manufacturing a liquid crystal display panel of the present invention, after the sealing material forming step, a liquid crystal sealing step of sealing liquid crystal between the two substrates is included, and after the liquid crystal sealing step, the peripheral portion It is preferable to include an end face forming step of forming at least a part of the end face of the liquid crystal display panel by cutting the two substrates and the peripheral edge side seal material in a region where the side seal material is disposed. .

  According to the manufacturing method of the liquid crystal display panel, the two substrates and the peripheral edge of the substrates into which the liquid crystal is injected in the liquid crystal sealing step are arranged in a region where the peripheral edge side sealing material is disposed in the end face forming step. Cut the part-side sealing material. Therefore, the sealing material is positioned on the formed end surface, and a useless area outside the sealing material can be reduced. That is, a liquid crystal display panel with a narrow frame can be manufactured. Further, even when the width of the sealing material is uniformly formed in the seal forming step, the two substrates and the above-described ones are formed in the region where the sealing material is disposed along the peripheral edge of the substrate in the end surface forming step. Since the sealing material is cut, it is not necessary to widen the sealing material in the sealing material forming step.

  In the liquid crystal display panel of the present invention, the width of the external connection terminal side sealing material which is a sealing material portion along the peripheral edge portion of the substrate along which the external connection terminal is formed is not formed with the external connection terminal. It is wider than the width of the peripheral side sealing material of at least one side which is the sealing material portion along the peripheral edge of the substrate.

  Therefore, there is an effect that it is possible to provide a liquid crystal display panel whose frame is narrowed by an interval of the width of the peripheral edge side sealing material.

  The method for manufacturing a liquid crystal display panel of the present invention includes a sealing material forming step of forming a sealing material on at least one of the two substrates in a shape surrounding a region where liquid crystal is sealed, and the sealing material forming step Then, the width of the external connection terminal side sealing material which is the sealing material portion along the peripheral edge portion of the substrate along the external connection terminal is set to the peripheral edge portion of the substrate where the external connection terminal is not formed. It is a manufacturing method which forms wider than the width | variety of the peripheral part side sealing material of the at least 1 side which is the sealing material part along.

  Therefore, in the seal forming step, a liquid crystal display panel with a narrow frame is manufactured in order to form a width of the external connection terminal side sealing material wider than a width of at least one side of the peripheral edge side sealing material. There is an effect that can be done.

  An embodiment of the present invention will be described with reference to FIGS. 1 to 4 as follows. FIG. 1 is a plan view of a liquid crystal display panel according to the present embodiment. The liquid crystal display panel 1 has a configuration in which a CF substrate 2 which is a substrate and a TFT substrate (not shown) are arranged to face each other. In addition, a liquid crystal display region 5 that is a region for sealing liquid crystal is formed in the gap between the two substrates, and a sealing material 4 is formed in a shape surrounding the liquid crystal display region 5.

  The CF substrate 2 has a configuration in which a counter electrode, a CF (Color Filter), a BM (Black Matrix), and the like are formed on a substrate composed of a glass substrate or the like. The TFT substrate is formed on a glass substrate or a substrate made of a resin film, a plurality of TFTs (Thin Film Transistors), a pixel electrode provided corresponding to each TFT, and a voltage applied to each TFT. A plurality of wirings (gate wiring, source wiring, drain wiring, etc.) for application are formed.

  The liquid crystal is sealed in a space surrounded by the CF substrate 2 and the TFT substrate and the sealing material 4 that connects the two substrates. Then, by applying a voltage to the liquid crystal between the pixel electrode on the TFT substrate and the counter electrode on the CF substrate 2, the alignment state of the liquid crystal is changed, and liquid crystal display is performed. This liquid crystal display is performed in the liquid crystal display area 5. In the present embodiment, an active matrix type liquid crystal display panel such as the liquid crystal display panel 1 is assumed as the liquid crystal display panel. However, the present invention is not limited to this, and a voltage is applied to the liquid crystal. Any liquid crystal display panel that performs display may be used. Further, the arrangement of CF and BM is not particularly limited.

  An external connection terminal 3 is provided at a position along one side of the peripheral edge of the CF substrate 2. The external connection terminal 3 is provided with a plurality of terminals that are electrically connected to each wiring. The external connection terminal 3 is used to connect the liquid crystal display panel 1 to another external member.

  The sealing material 4 is formed in a shape surrounding the liquid crystal display region 5 on the CF substrate 2. The sealing material 4 may be formed of a single material or may be formed of a different material depending on the part. In the case of being formed of a single material, the thickness (the width when viewed from the direction perpendicular to the substrate surface) at which the sealing material 4 is formed can be made substantially uniform at any sealing material 4 position. It is more preferable.

  The raw material for the sealing material 4 is not particularly limited, and a known raw material for the sealing material can be used. For example, a thermosetting resin may be used.

  Of the sealing material 4, a portion of the sealing material 4 along the external connection terminal 3 along the peripheral edge of the CF substrate 2 is defined as an external connection terminal side sealing material 4 a. Moreover, the part of the sealing material 4 along the peripheral part of the CF substrate 2 in which the external connection terminals 3 are not formed in the sealing material 4 is referred to as a peripheral part side sealing material 4b. The width of the external connection terminal side sealing material 4a is formed wider than the width of the peripheral edge side sealing material 4b.

  Since a load such as heat and pressure is applied in the vicinity of the external connection terminal 3 when connected to another member, the external connection terminal side sealing material 4a needs to have a peel strength capable of withstanding the load. . On the other hand, since the peripheral edge side sealing material 4b is not located in the vicinity of the external connection terminal 3, loads such as heat and pressure are not applied as compared with the external connection terminal side sealing material 4a.

  Therefore, as described above, by forming the width of the external connection terminal side sealing material 4a wider than the width of the peripheral edge side sealing material 4b, the width of the peripheral edge side sealing material 4b is increased. The area (frame area) between the liquid crystal display area 5 and the end face can be reduced by an amount smaller than 4a. That is, the liquid crystal display panel 1 with a narrow frame can be provided. When a plurality of external connection terminal side sealing materials 4a are formed, it is not necessary to form the external connection terminal side sealing materials 4a adjacent to each other, and they may be formed at positions along each other. Further, the width of the external connection terminal side sealing material 4a does not need to be set narrow, and there is no possibility of deteriorating the peeling strength, so that the reliability related to the peeling strength of the external connection terminal side sealing material 4a can be ensured.

  In the liquid crystal display panel 1, the width of the external connection terminal side sealing material 4a is wider than the width of the three peripheral edge side sealing materials 4b, but is not limited to this configuration. For example, the width of the external connection terminal side sealing material 4a may be configured to be wider than the width of at least one peripheral edge side sealing material 4b of the three peripheral edge side sealing materials 4b. Only the width of the peripheral edge side sealing material 4b may be narrower than the width of the external connection terminal side sealing material 4a. This configuration can also provide a liquid crystal display panel with a narrow frame. Further, the external connection terminals 3 may be formed along two or three sides of the peripheral edge of the CF substrate 2. In this case, the external connection terminal side sealing material 4 a is formed along a plurality of sides of the CF substrate 2.

  Although it does not specifically limit about the width | variety of the terminal side sealing material 4a for external connection, It is preferable that it is 1 mm or less. This makes it possible to provide a liquid crystal display panel with a narrower frame. In the liquid crystal display panel 1, the interval L1 is set to 2 mm, the width of the external connection terminal side sealing material 4a is set to 1 mm, the interval L2 and the interval L3 are set to 1.5 mm, respectively, and the peripheral side seals on the three sides are set. The width of the material 4b is 0.5 mm.

  An electronic apparatus according to the present invention includes the liquid crystal display panel. Since the liquid crystal display panel has a narrow frame, it is possible to provide a miniaturized electronic device.

  Next, the manufacturing method of the liquid crystal display panel in this embodiment is demonstrated. In the method for manufacturing a liquid crystal display panel according to the present embodiment, two substrates are arranged to face each other, liquid crystal is sealed in a gap between the two substrates, and along at least one side of the peripheral portion of the substrate. In the manufacturing method of a liquid crystal display panel provided with the terminal for external connection, it is a manufacturing method including a sealing material formation process.

  The sealing material forming step is a step of forming the sealing material 4 on at least one of the two substrates so as to surround the liquid crystal sealing region. In the sealing material forming step, the external connection terminal side seal is formed. The width of the material 4a is formed wider than the width of the peripheral edge side sealing material 4b on at least one side of the peripheral edge side sealing material 4b.

  As a method of forming the sealing material 4, if the width of the external connection terminal side sealing material 4a can be formed wider than the width of the peripheral edge side sealing material 4b of at least one side of the peripheral edge side sealing material 4b, It is not particularly limited. When a plurality of external connection terminal side sealing materials 4a are formed, it is not necessary to form the external connection terminal side sealing materials 4a adjacent to each other, and they may be formed at positions along each other.

  For example, the sealing material 4 can be formed by a screen printing method. In this case, the portion corresponding to the external connection terminal side sealing material 4a in the portion of the screen plate punching pattern used for screen printing is selected from the peripheral side sealing material 4b of at least one side of the peripheral side sealing material 4b. It is formed wider than the part corresponding to the width. For example, when the width of the external connection terminal side sealing material 4a is formed to be the same width as the width of the opposing peripheral edge side sealing material 4b and the width of the other peripheral edge side sealing material 4b is narrow, A liquid crystal display panel 1 as shown in the figure can be formed.

  The width of the peripheral edge side sealing material 4b is preferably 1 mm or less. As a result, a liquid crystal display panel with a narrower frame can be manufactured.

  In the sealing material forming step, the sealing material 4 may be formed using a dispenser. FIG. 2 is a plan view showing the forming direction of the sealing material 4 in the manufacturing process of the liquid crystal display panel manufacturing method using a dispenser. Members having the same functions as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted. Arrows A1 to A5 indicate the formation direction of the sealing material 4.

  First, a part of the external connection terminal side sealing material 4a is formed at the end of the side along the liquid crystal display region 5, and the external connection terminal side sealing material 4a is formed in the direction of the arrow A1. Thereafter, a peripheral edge side sealing material 4b is formed in a shape surrounding the liquid crystal display area 5 in the directions of arrows A2, A3, and A4. Thereafter, a part of the external connection terminal side sealing material 4a is further formed in the direction of arrow A5 at a position on the external connection terminal 3 side along a part of the external connection terminal side sealing material 4a. The arrow A5 is described at a position farther from the liquid crystal display region 5 than the arrow A1, but this is after the external connection terminal side sealing material 4a is formed along the liquid crystal display region 5 in the direction of the arrow A1. Furthermore, it means that the external connection terminal side sealing material 4a is formed on the side along the external connection terminal 3 in the direction of the arrow A5. In FIGS. 3 to 5 to be described later, the positional relationship between the arrows has the same meaning.

  According to said manufacturing method, even if it is a case where a dispenser is used, the width | variety of the terminal side sealing material 4a for external connection is the peripheral part side sealing material of at least 1 side among the peripheral part side sealing materials 4b of 3 sides. A liquid crystal display panel 1a wider than 4b can be manufactured. The dispenser is adjusted so that the partial width of the external connection terminal side sealing material 4a and the width of the peripheral edge side sealing material 4b are each 0.5 mm.

  In the case of using a dispenser, there is a problem that the width of the sealing material cannot be stably formed because the amount of the raw material of the sealing material discharged at the start of discharge and at the end of discharge is likely to fluctuate. That is, when forming a sealing material using a dispenser, it is from the start of discharge until before a predetermined amount of sealing material is discharged, and after the predetermined sealing material is discharged until before the end of discharge. In the meantime, the amount of the raw material of the discharged sealing material tends to become unstable.

  Therefore, in the liquid crystal display panel manufacturing method according to the present embodiment, at least one before and after the sealing material forming step, using a dispenser, the external connection terminal side sealing material and the peripheral edge side sealing material It is preferable that the method further includes a raw material discharge step of discharging a predetermined amount of the raw material of the sealing material outside the region, and discharging the raw material of the sealing material by the dispenser in the sealing material forming step and the raw material discharge step is preferably performed continuously.

  According to the above manufacturing method, at least one before and after the seal forming step, a predetermined amount of the raw material of the sealing material is discharged outside the region of the external connection terminal side sealing material and the peripheral edge side sealing material, The discharge of the predetermined amount of the raw material of the sealing material and the formation of the sealing material in the sealing material forming step are continuously performed. Therefore, it is possible to stably form the widths of the external connection terminal side sealing material and the peripheral edge side sealing material. If the raw material discharge step is included before and after the seal formation step, the width of the external connection terminal side sealing material and the peripheral portion side sealing material can be more stably formed. preferable.

  The “predetermined amount” in the predetermined amount of the sealing material is a dispenser to be used that indicates the amount of the raw material of the sealing material that becomes unstable before and after the discharge of the sealing material by the dispenser. It is appropriately set depending on the type of the dispenser, the use condition of the dispenser, the width of the sealing material to be formed, and the like.

  Hereafter, the said manufacturing method is demonstrated concretely. FIG. 3 is a plan view showing the forming direction of the sealing material 4 in the manufacturing process of the manufacturing method. As shown in the figure, the liquid crystal display panels 1b, 1c, and 1d are arranged side by side at a predetermined interval so as to form the sealing material 4 on the CF substrate 2. First, using a dispenser, the sealing material 4 is formed outside the CF substrate 2 located on the upper left side of the liquid crystal display panel 1b. That is, the sealing material 4 is formed outside the region of the external connection terminal side sealing material 4a and the peripheral edge side sealing material 4b. Thereafter, the seal material 4 is continuously formed by a dispenser.

  Next, a part of the external connection terminal side sealing material 4a is formed along the external connection terminal 3 in the direction of the arrow B1. Thereafter, the peripheral edge side sealing material 4b is formed along the peripheral edge of the CF substrate 2 in the directions of arrows B2, B3, and B4. Further, a part of the external connection terminal side sealing material 4a is formed in the direction of the arrow B5 at a position on the liquid crystal display region 5 side along a part of the formed external connection terminal side sealing material 4a. The dispenser is adjusted so that the partial width of the external connection terminal side sealing material 4a and the width of the peripheral edge side sealing material 4b are each 0.5 mm.

  According to such a manufacturing method, before and after a predetermined amount of the raw material of the sealing material is discharged outside the regions of the external connection terminal side sealing material 4a and the peripheral edge side sealing material 4b, the external connection terminal side seal The material 4a and the peripheral edge side sealing material 4b are formed. Therefore, in the region of the external connection terminal side sealing material 4a and the peripheral edge side sealing material 4b, the external connection terminal side sealing material 4a and the peripheral edge are not formed by the raw material of the sealing material whose discharge amount is likely to fluctuate. The width of the part-side sealing material 4b can be formed stably. Further, by forming the external connection terminal side sealing material 4a twice with a dispenser, the width of the external connection terminal side sealing material 4a is twice as wide as the width of the three peripheral edge side sealing materials 4b. Can be formed.

  Further, in the same figure, after the sealing material 4 is formed on the liquid crystal display panel 1a, the sealing material 4 is continuously formed by a dispenser, and the sealing material 4 is also formed on the liquid crystal display panel 1c. Members having the same functions as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted. The sealing material 4 is formed by forming part of the external connection terminal side sealing material 4a twice as in the method performed in the liquid crystal display panel 1a, but the external connection terminal side seal formed first time. A part of the material 4a is formed along the liquid crystal display region 5, and a part of the external connection terminal side sealing material 4a formed a second time is formed along the external connection terminal 3 side. Thereafter, the sealing material 4 is also formed on the liquid crystal display panel 1d in the same manner as the liquid crystal display panel 1b.

  By continuously forming the sealing material 4 on the liquid crystal display panels 1b, 1c, and 1d as described above, the width of the sealing material 4 surrounding the liquid crystal enclosing region can be stably formed. The narrow frame liquid crystal display panels 1b, 1c, and 1d can be efficiently manufactured.

  After the sealing material forming step, a liquid crystal sealing step for sealing liquid crystal between the two substrates is performed. In the liquid crystal injection step, a known method may be used as a method for injecting liquid crystal. For example, after the TFT substrate is bonded to the CF substrate 2 on which the sealing material 4 is formed, a vacuum injection method in which liquid crystal is injected from a part of the sealing material 4 under a vacuum condition can be used.

  Moreover, in the manufacturing method of the liquid crystal display panel which concerns on this Embodiment, it is preferable that an end surface formation process is included after the said liquid crystal enclosure process. The end face forming step is an area where the peripheral edge side sealing material is disposed, and cuts the CF substrate 2, the TFT substrate and the peripheral edge side sealing material, thereby forming at least a part of the end face of the liquid crystal display panel. It is a process of forming. FIG. 4 is a plan view showing the liquid crystal display panel 1e in the process of manufacturing the liquid crystal display panel. Members having the same functions as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  The liquid crystal display panel 1e shown in FIG. 4 is configured to be cut into three pieces, and three external connection terminals 3 and three liquid crystal display areas 5 are formed on one CF substrate 2, respectively. Further, the interval L1 is set to 2.0 mm, and the interval L2 and the interval L3 are set to 1.0 mm.

  In the end face forming step, the CF substrate 2, the TFT substrate and the peripheral edge side sealing material are cut at the broken line portion. Therefore, in the liquid crystal display panel 1e, as in the case of the liquid crystal display panels 1b, 1c and 1d shown in FIG. Is used to form the sealing material 4 in the directions of arrows B1 to B5, arrows C1 to C5, and arrows D1 to D5. The difference from the case of the liquid crystal display panels 1b, 1c, and 1d is that the peripheral edge side sealing material 4b formed in the direction of the arrow B2 and the arrow C4, the arrow C2 and the arrow D4 on the single CF substrate 2 is adjacent to each other. It is a point to form.

  The dispenser is adjusted so that the seal width is 0.5 mm. In addition, it is preferable that a cutting | disconnection is performed in the location which becomes a substantially center with respect to the width | variety of the peripheral part side sealing material 4b. Therefore, a part of the external connection terminal side sealing material 4a formed twice is formed so as to be positioned on the liquid crystal display region 5 side by 0.75 mm and 1.25 mm from the external connection terminal 3, respectively. On the other hand, the peripheral edge side sealing material 4b is formed to be on the liquid crystal display region 5 side by 0.25 mm from the broken line. Finally, the external connection terminal side sealing material 4a and the peripheral portion side sealing material 4b are formed to have a width of 1.0 mm.

  In the liquid crystal sealing step, after the TFT substrate is bonded to the CF substrate 2, the two substrates and the peripheral portion side sealing material are cut in the region where the peripheral portion side sealing material is disposed in the end face forming step. The cutting is performed at two broken line portions in the region of the peripheral edge side sealing material 4b as shown in FIG. As shown in the figure, at least a part of the liquid crystal display panel 1e is obtained by cutting the CF substrate 2 and the TFT substrate and the peripheral edge side sealing material 4b in the region where the peripheral edge side sealing material 4b is disposed. The end face is formed. Therefore, the sealing material 4 is located on the formed end surface, and a useless area outside the sealing material 4 can be reduced. That is, a liquid crystal display panel with a narrow frame can be manufactured.

  Examples of the cutting method in the end face forming step include a cutting method using a wheel provided with a rotary blade or a laser. When cutting with a wheel, when the wheel moves from a portion where the peripheral edge side sealing material 4b is arranged to a portion where the peripheral edge side sealing material 4b is not arranged (or vice versa), due to the bending of the substrate, There are problems that cutting is not performed properly and that cracking and chipping may occur. Therefore, it is preferable to arrange a spacer in an area where the peripheral edge side sealing material 4b is not arranged among the areas to be cut in the end face forming step. Thereby, the bending of the substrate can be suppressed and cutting can be performed appropriately. Note that a break device that applies an impact along the broken line is used for the division.

In the present embodiment, the CF substrate 2 and the TFT substrate are cut by the wheel as described above assuming that the substrate thickness is less than 0.3 μm, but the substrate having a thickness of 0.3 μm or more is used. In the case of using a substrate having a thickness, laser cutting may be performed. FIG. 5 is a plan view showing the liquid crystal display panel 1f in the course of the manufacturing method of the liquid crystal display panel. Members having the same functions as those in FIGS. 1 and 4 are denoted by the same reference numerals, and description thereof is omitted. In the sealing material forming step, the sealing material 4 is formed in the directions of arrows B1 to B5, arrows C1 to C5, and arrows D1 to D5 using a dispenser.

  In the liquid crystal display panel 1f, the formation positions of the external connection terminal side sealing material 4a indicated by the directions of the arrow B5 and the arrow C1 are not located on the same straight line. Therefore, after forming the external connection terminal side sealing material 4a along the liquid crystal display region 5 in the direction of the arrow B5, the external connection terminal side sealing material 4a is formed along the liquid crystal display region 5 in the direction of the arrow C1. The sealing material 4 is formed in an oblique direction to the position to be formed. A similar method is used when the sealing material 4 is formed from the arrow C5 to the arrow D1 and from the arrow D5 to the outside of the substrate. By forming the sealing material 4 as described above, the shape of the sealing material 4 of each liquid crystal display panel obtained after the end face forming step can be made similar. Thereby, the difference in the shape between liquid crystal display panels can be reduced.

  In this embodiment, the sealing material 4 is first formed on the CF substrate 2, but it may be formed on the TFT substrate or may be formed and bonded to both. The liquid crystal display panel 1e is formed with three external connection terminals 3 and three liquid crystal display areas 5 so that three liquid crystal display panels can be manufactured by the end face forming step. The number is not limited to the number, and the number of installation locations may be appropriately changed according to the desired number of liquid crystal display panels.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims. That is, embodiments obtained by combining technical means appropriately changed within the scope of the claims are also included in the technical scope of the present invention.

  The liquid crystal display panel and the manufacturing method of the liquid crystal display panel according to the present invention can be applied to an active matrix type liquid crystal display panel using a TFT or the like, a passive matrix type liquid crystal display panel, or the like. In addition, an electronic device including the liquid crystal display panel according to the present invention can be applied to mobile devices such as a mobile phone device, a portable information terminal device, and a portable game device.

It is a top view of the liquid crystal display panel which concerns on this Embodiment. It is a top view which shows the formation direction of the sealing material 4 in the manufacturing method of the liquid crystal display panel which concerns on this Embodiment. It is a top view which shows the formation direction of the sealing material 4 in the manufacturing method of the liquid crystal display panel which concerns on this Embodiment. It is a top view which shows the formation direction of the sealing material 4 in the manufacturing method of the liquid crystal display panel which concerns on this Embodiment. It is a top view which shows the formation direction of the sealing material 4 in the manufacturing method of the liquid crystal display panel which concerns on this Embodiment.

Explanation of symbols

1, 1a, 1b, 1c, 1d, 1e, 1f Liquid crystal display panel 2 CF substrate (substrate)
3 External connection terminal 4 Sealing material 4a External connection terminal side sealing material 4b Peripheral side sealing material 5 Liquid crystal display area

Claims (8)

Two substrates disposed opposite each other;
Liquid crystal sandwiched in the gap between the two substrates,
A sealing material formed in a shape surrounding a region enclosing liquid crystal in a gap between the two substrates;
In a liquid crystal display panel comprising an external connection terminal along at least one side of the peripheral portion of the substrate,
The width of the external connection terminal side sealing material, which is the sealing material portion along the peripheral edge of the substrate along which the external connection terminals are aligned, is along the peripheral edge of the substrate where the external connection terminals are not formed. A liquid crystal display panel characterized in that it is wider than a width of at least one side peripheral edge side sealing material which is a sealing material portion.   2. The liquid crystal display panel according to claim 1, wherein a width of the peripheral edge side sealing material is 1 mm or less.   An electronic apparatus comprising the liquid crystal display panel according to claim 1. A method of manufacturing a liquid crystal display panel comprising two substrates facing each other, liquid crystal sealed in a gap between the two substrates, and an external connection terminal along at least one side of the peripheral edge of the substrate In
Including a sealing material forming step of forming a sealing material on at least one of the two substrates in a shape surrounding a region in which liquid crystal is sealed;
In the sealing material forming step, the width of the external connecting terminal side sealing material which is a sealing material portion along the peripheral edge portion of the substrate along which the external connecting terminal extends is set to the width of the external connecting terminal not formed. A method for manufacturing a liquid crystal display panel, comprising forming at least one marginal side sealing material that is a sealing material portion along a peripheral portion of a substrate.   5. The method of manufacturing a liquid crystal display panel according to claim 4, wherein, in the sealing material forming step, the width of the peripheral edge side sealing material is 1 mm or less. In the sealing material forming step, a part of the external connection terminal side sealing material is formed using a dispenser,
The external connection terminal side sealing material is formed by further forming a part of the external connection terminal side sealing material at a position along a part of the external connection terminal side sealing material. The manufacturing method of the liquid crystal display panel of Claim 4. A raw material discharge step of discharging a predetermined amount of the raw material of the sealing material outside the region of the external connection terminal side sealing material and the peripheral edge side sealing material using a dispenser at least before and after the sealing material forming step Further including
5. The method of manufacturing a liquid crystal display panel according to claim 4, wherein discharge of the raw material of the sealing material by the dispenser in the sealing material forming step and the raw material discharging step is continuously performed. After the sealing material forming step, including a liquid crystal sealing step of sealing liquid crystal between the two substrates,
After the liquid crystal sealing step, at least a part of the end face of the liquid crystal display panel is formed by cutting the two substrates and the peripheral edge side sealing material in a region where the peripheral edge side sealing material is disposed. The method of manufacturing a liquid crystal display panel according to claim 4, further comprising an end face forming step of forming.

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