JP2008165132A - Electro-optical device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electro-optical device which can securely protect a terminal for inspection against moisture or the like, can be made thin in thickness, and is high in mechanical strength. <P>SOLUTION: A liquid crystal display device 1 has a liquid crystal panel 3, which is constituted by sticking a first light-transmissive substrate 13 and a second light-transmissive substrate 14 together, the substrate 13 having a projection portion 18 that projects from the substrate 14 and the terminal 19 for inspection at the projection part 18 and an image displayed in a display area V; a frame 2 which supports the display panel 3; an external frame 4a which houses the liquid crystal panel 3 and frame 2 and has an opening 25 corresponding to the display area V; and a both-sided adhesive member 28, which is provided in a peripheral area outside the opening 25 and between the external frame 4a and frame 2. The both-sided adhesive member 28 has one surface stuck on the frame 2 and another surface stuck on the external frame 4a, and further, covers the terminal 19 for inspection. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an electro-optical device such as a liquid crystal display device and the like, which includes an inspection terminal. The present invention also relates to an electronic apparatus using the electro-optical device.

  Currently, electro-optical devices such as liquid crystal display devices and EL devices are widely used in various electronic devices such as mobile phones and portable information terminals. For example, an electro-optical device is used as a display unit for visually displaying various types of information related to electronic devices. As this electro-optical device, one having a built-in inspection terminal is known (for example, see Patent Document 1).

  Patent Document 1 discloses disposing a TEG (test element group) as an inspection terminal in a part of a peripheral region of a substrate. The TEG is supposed to be used when performing simulated inspection of electrical states of various wirings, electrodes, electronic elements, etc. in the electro-optical device during the manufacturing or at the completion of the manufacturing. Further, it is described that the TEG can be protected by covering it with a mounting case. Further, it is described that the TEG is preferably hidden and protected by the mounting case. Furthermore, since the TEG is not covered with an FPC (Flexible Printed Circuit) substrate, a simulation using the TEG without removing the FPC even after use is completed after manufacturing, mounting, and use. It is described that inspection is possible.

  2. Description of the Related Art Conventionally, a technique for protecting an inspection terminal by covering it with an FPC board in a liquid crystal display device is known (for example, see Patent Document 2). This Patent Document 2 describes a configuration in which an FPC is bonded to a test signal input line as an inspection terminal via an anisotropic conductive film.

Japanese Patent Laying-Open No. 2004-341216 (page 11, FIG. 1) JP 2006-301135 A (page 4, FIG. 1)

  Patent Document 1 discloses a technique in which a TEG as an inspection terminal is hidden and protected by a mounting case, but this is simply because the TEG is hidden from view by the mounting case. There is no disclosure of a technique for protecting the TEG from an external environment such as moisture.

Patent Document 2 discloses that the test signal input terminal as an inspection terminal is covered with FPC to insulate and protect the test signal input terminal. According to this method, it is considered that the test signal input terminal can be protected from moisture, and can be protected from impact and vibration.
However, in order to cover the inspection terminal with the FPC, the shape of the FPC must be greatly changed as compared with a normal FPC. In addition, it is difficult to mount the FPC whose shape has changed greatly at a desired position on the substrate. Further, covering the inspection terminal with the FPC means that two layers of the FPC and the adhesive are laminated on the inspection terminal, and a large space is required on the inspection terminal. There is a risk of reducing the thickness.

  As a technique other than the above-described conventional technique, a technique of covering an inspection terminal with a silicon mold is well known. In this technology, by applying a silicon mold on the inspection terminal, the contact of the inspection terminal with moisture causes corrosion, which adversely affects the electro-optical device as a product. Is to protect. However, in this resin molding method, a thick molding resin is provided on the inspection terminal, and therefore, the electro-optical device cannot be formed thin.

  The present invention has been made in view of the above-mentioned problems, can reliably protect the inspection terminal from the external environment such as moisture, etc., it is very easy to procure parts to realize it, Provided are an electro-optical device and an electronic apparatus that can realize the above-described process, can greatly contribute to the thinning of the electro-optical device, and can improve the shock resistance and vibration resistance of the electro-optical device. The purpose is to do.

  The electro-optical device according to the present invention includes: (1) a pair of substrates that are bonded together, and one of the pair of substrates has an overhang portion that overhangs from the other substrate, and the overhang portion includes an inspection terminal. An electro-optical panel that displays an image in the display area; (2) a support frame that supports the electro-optical panel; and (3) an opening corresponding to the display area that accommodates the electro-optical panel and the support frame. And (4) a double-sided pressure-sensitive adhesive member provided in a peripheral region outside the opening and provided between the outer frame and the support frame, and (5) the double-sided pressure-sensitive adhesive member Is characterized in that one surface adheres to the support frame, the other surface adheres to the outer frame, and further covers the inspection terminal.

  In the above configuration, the “inspection terminal” is formed in a predetermined shape on the substrate by performing an appropriate patterning process (for example, photoetching process) on a conductive metal material such as Cu (copper) or Al (aluminum). It is a conductive pattern. An “electro-optical panel” is a panel structure that forms an image by the action of an electro-optical material. For example, a liquid crystal panel that uses liquid crystal as an electro-optical material, or an EL panel that uses an EL (Electro Luminescence) material as an electro-optical material Etc. are considered.

  The “support frame” can be formed by a molding technique using an appropriate resin as a material, for example. Since the “outer frame” is a component arranged on the outermost side of the electro-optical device, it has high mechanical strength, good appearance, easy processing, and is made of a light material, for example, stainless steel. The “double-sided adhesive member” is formed by providing an adhesive material in layers on both sides of a sheet-like resin base material. Like a general double-sided pressure-sensitive adhesive member, the double-sided pressure-sensitive adhesive member used in the present invention is a member that is pressed and deformed to generate an elastic restoring force and can be restored to its original natural state by releasing the pressure.

  According to the electro-optical device of the present invention configured as described above, an image displayed in the display area of the electro-optical panel can be visually recognized through the opening provided in the outer frame. By applying a predetermined inspection signal to the inspection terminal, it is possible to perform a lighting inspection of the electro-optical panel, and it is possible to inspect components such as electrodes, wirings, switching elements, and the like. Since the support frame is firmly fixed to the outer frame by the double-sided adhesive member, the support frame, that is, the electro-optical panel, can be stored in a fixed position inside the outer frame.

  Since the double-sided adhesive member adheres to the inspection terminal and covers the inspection terminal, even if an external force is applied to the outer frame, it can continue to cover the inspection terminal without deviating from the inspection terminal. The inspection terminal can be reliably protected from the external environment such as moisture over a long period of time.

  In the conventional method of coating the terminal for inspection based on the resin mold, the thickness of the mold cannot be reduced, so that the entire thickness of the electro-optical device cannot be reduced. On the other hand, since the double-sided pressure-sensitive adhesive member used in the present invention has a simple structure in which the pressure-sensitive adhesive material is simply provided in layers on both sides of the base member, the double-sided pressure-sensitive adhesive member can be formed very thin. For example, it can be easily formed to a thickness of 0.1 mm or less. Therefore, according to the present invention, the entire thickness of the electro-optical device can be extremely reduced.

  When considering a small liquid crystal display device, a small EL device, etc. as the electro-optical device, the thickness of the glass substrate used is conventionally about 0.5 mm, and the thickness of the electro-optical device is relatively thick. . Recently, however, the electro-optical device is required to be thin. For example, it is desired to reduce the thickness of the electro-optical device by using a glass substrate having a thickness of about 0.1 to 0.2 mm. Such excessive thinning is impossible in the conventional coating process using a resin mold. On the other hand, as in the present invention, if a double-sided adhesive member that has been conventionally used for fixing an outer frame is utilized, and this double-sided adhesive member is adhered to an inspection terminal to cover it, The electro-optical device can be made very thin by thinly forming an electro-optical panel such as a liquid crystal panel and by thinning the double-sided adhesive member for fixing the outer frame and protecting the inspection terminal.

  Conventionally known is a structure in which a double-sided adhesive member is attached to the inner surface of the outer frame, a support frame supporting the electro-optic panel is accommodated in the outer frame, and the opposite surface of the double-sided adhesive member is attached to the support frame. It was. In this case, the double-sided pressure-sensitive adhesive member is provided only in a necessary portion of the peripheral region of the support frame. Such a usage method of using the double-sided pressure-sensitive adhesive member only in a limited portion sufficiently satisfies the requirement only for determining the position of the support frame in the outer frame. In addition to the conventional method of using such a double-sided pressure-sensitive adhesive member, the present invention increases the area of the double-sided pressure-sensitive adhesive member to be attached to the inner surface of the outer frame, and covers the inspection terminal with the increased double-sided pressure-sensitive adhesive member. It is.

  The double-sided adhesive member is originally formed in various shapes according to the planar shape of the electro-optical panel and the support frame, and the shape of this double-sided adhesive member is transformed into a shape that can cover the inspection terminal. It does not require any special effort. That is, it is very simple to form the double-sided adhesive member in a shape that can cover the inspection terminal. In addition, the work of arranging the double-sided adhesive member in a position covering the inspection terminal is not a special work, but simply a work of assembling the outer frame to the electro-optical panel or the support frame as usual. It is. Therefore, the work is very simple.

  Moreover, adhering the double-sided adhesive member adhered to the inner surface of the outer frame to the inspection terminal on the substrate is nothing but integrating the substrate and the outer frame with the double-sided adhesive member. Further, the double-sided pressure-sensitive adhesive member is originally for integrating the outer frame and the support frame by adhesion. Therefore, if the substrate is adhered to the outer frame by the double-sided adhesive member according to the present invention, the three points of the outer frame, the substrate, and the support frame are adhered and integrated by the double-sided adhesive member. If the three points of the outer frame, the substrate, and the support frame are integrated, the support frame and the electro-optical panel do not vibrate or move around in the outer frame, and can be protected from damage.

  Next, in the electro-optical device according to the present invention, the double-sided pressure-sensitive adhesive member is sandwiched and pressed by the outer frame and the support frame, and by the outer frame and the region where the inspection terminal of the overhang portion is formed. It is desirable. According to this configuration, the adhesive force of the double-sided adhesive member increases according to the pressing force, and therefore, the electro-optical panel and the support frame can be stably held in the outer frame.

  Next, in the electro-optical device according to the present invention, it is desirable that the double-sided adhesive member adheres to the surrounding area of the electro-optical panel in addition to the support frame. According to this configuration, both the electro-optical panel and the support frame can be held more stably in the outer frame. In this case, it is desirable that the double-sided adhesive member is sandwiched and pressed between the outer frame and the electro-optical panel. If it carries out like this, the adhesive force of a double-sided adhesive member can be raised according to a pressing force, and an electro-optical panel and a support frame can be hold | maintained still more stably in an outer frame.

  Next, in the electro-optical device according to the present invention, it is desirable that the double-sided pressure-sensitive adhesive member is provided in an endless annular shape in the peripheral region of the outer frame, and a part thereof extends to cover the inspection terminal. If the double-sided pressure-sensitive adhesive member is formed in an endless annular shape, the entire peripheral area of the support frame can be pressed evenly, so that the support frame and thus the electro-optical panel can be stably held.

  Next, in the electro-optical device according to the present invention, it is preferable that the double-sided adhesive member fills a space between the one substrate on which the inspection terminal is formed and the outer frame in a state where the inspection terminal is covered.

  The pair of substrates attached to each other in the electro-optical device is a configuration generally found in a liquid crystal display device. In a liquid crystal display device, a liquid crystal that is an electro-optical material is sandwiched between a pair of substrates facing each other. A polarizing plate is attached to the outer surfaces of the pair of substrates. Then, an image is displayed on the surface of the polarizing plate by passing the polarized light modulated for each pixel by the liquid crystal layer through the polarizing plate.

  In the electro-optical device according to the present invention, one of the substrates has a projecting portion that projects to the outside of the other substrate, and an inspection terminal is provided on the projecting portion. Thus, a space is formed in the upper part of the portion where one substrate projects from the other substrate. If there is this space, the electro-optical panel and the support frame may vibrate in the outer frame, causing damage. In this regard, as in the embodiment of the present invention, if the double-sided adhesive member covers the inspection terminal and fills the space between the one substrate on which the inspection terminal is formed and the outer frame, Vibrations can be prevented from occurring in the optical panel and the support frame, and damage can be prevented from occurring.

  Next, in the electro-optical device according to the invention, it is desirable that the thickness of the double-sided pressure-sensitive adhesive member in the natural state is the same as or thicker than the thickness of the other substrate. The natural state is a state where no external force is applied to the double-sided pressure-sensitive adhesive member. According to the aspect of the present invention, the space between the substrate and the outer frame can be reliably filled without a gap, and therefore, the electro-optical panel can be prevented from moving around in the outer frame.

  Next, in the electro-optical device according to the invention, it is desirable that the surface that adheres to the outer frame of the double-sided adhesive member is a strong adhesive surface, and the opposite surface is a weak adhesive surface. In this way, the double-sided adhesive member can be firmly adhered to the inner surface of the outer frame (in some cases, cannot be removed), and can be adhered to the support frame and the electro-optical panel in a state that can be easily removed with a weak adhesive force. With this configuration, when the produced electro-optical device is a defective product, it is easy to perform a so-called rework process in which only good parts are reused.

  Next, in the electro-optical device according to the invention, the driving IC can be mounted on the one substrate on which the inspection terminal is provided. This mounting structure is a mounting structure based on the so-called COG (Chip On Glass) technology. In that case, the inspection terminal is preferably provided between the side of the driving IC and the side of the one substrate that is closest to the side of the driving IC.

  Since the driving IC has a thickness or a height, a space is easily formed around the driving IC, and if such a space is present, the electro-optical panel is likely to vibrate and move around, and therefore is damaged. Easy to do. When an inspection terminal is formed in the vicinity of the driving IC, if the inspection terminal is covered with the double-sided adhesive member according to the present invention, the space around the driving IC is filled with the double-sided adhesive member. Therefore, the occurrence of vibration or the like of the electro-optical panel can be suppressed, and the occurrence of damage can be suppressed.

  Next, an electronic apparatus according to the present invention includes the electro-optical device having the above-described configuration. According to the electro-optical device according to the present invention, a thin electro-optical device having high mechanical strength can be manufactured by a simple operation without increasing the number of components. Therefore, even in an electronic apparatus using the electro-optical device, a thin electronic apparatus having high mechanical strength can be manufactured by a simple operation without increasing the number of parts.

  Hereinafter, an electro-optical device according to the present invention will be described with reference to an embodiment thereof. In addition, embodiment described below is an example of this invention, Comprising: This invention is not limited. In the following description, reference will be made to the drawings as necessary. In this drawing, in order to clearly show important constituent elements among the structure composed of a plurality of constituent elements, the relative dimensions different from actual ones are shown. Is shown.

  FIG. 1 shows a liquid crystal display device 1 as an example of an electro-optical device according to the present invention in an exploded state. FIG. 2A shows a plan composition of a liquid crystal panel which is a main part of the liquid crystal display device of FIG. FIG. 2B shows a planar structure of a first outer frame which is another main part of the liquid crystal display device of FIG. 3, 4, and 5 show cross-sectional structures of respective portions of the liquid crystal display device according to the lines Za-Za, Zb-Zb, and Zc-Zc in FIG. 1, respectively.

  In FIG. 1, a liquid crystal display device 1 includes a frame 2 as a support frame, a liquid crystal panel 3 as an electro-optical panel supported by the frame 2, and a pair of upper and lower outer frames covering the frame 2 and the liquid crystal panel 3. 4. The outer frame 4 is formed by fitting the first outer frame 4a and the second outer frame 4b.

  In the present embodiment, the liquid crystal display device 1 is intended as a thin liquid crystal display device, and therefore the liquid crystal panel 3 is configured as a thin panel structure. For example, the thickness of the liquid crystal panel 3 is set to 0.6 mm or less. Moreover, the thickness of each board | substrate which comprises a liquid crystal panel is made into 0.3 mm or less, for example. An illumination device 5 is provided inside the frame 2. The illumination device 5 is disposed on the back side of the liquid crystal panel 3 as viewed from the observation side indicated by the arrow A and functions as a backlight. The illuminating device 5 includes an LED (Light Emitting Diode) 6 as a light source, and a light guide 7 that converts the spot light emitted from the LED 6 into a planar shape and emits the light. The light guide 7 is formed of, for example, a light transmissive resin.

  A plurality of LEDs 6 are provided, six in this embodiment. These six LEDs 6 are mounted on the LED mounting area A0 of the FPC board 10. The FPC board 10 has a terminal 11, and power is supplied to each LED 6 through the terminal 11. As shown in FIG. 5, the light emitting surface 6 a of each LED 6 is provided to face the light incident surface 7 a that is the side surface of the light guide 7. Light emitted from each LED 6 is introduced into the light guide 7 from the light incident surface 7a. The light introduced into the light guide 7 is emitted as planar light from the light emitting surface 7 b and supplied to the liquid crystal panel 3. Although not shown, the light emitting surface 7b of the light guide 7 facing the liquid crystal panel 3 is provided with various optical elements such as a light reflection layer and a light diffusion layer as necessary. The light source can also be configured by a point light source other than the first LED 6 or a linear light source such as a cold cathode tube.

  In FIG. 1, an adhesive sheet 12 is provided between the lighting device 5 and the liquid crystal panel 3. The pressure-sensitive adhesive sheet 12 is formed in a frame shape having an opening having substantially the same size as the display area V of the liquid crystal panel 3. The adhesive sheet 12 is made of a light shielding material. The frame 2 and the liquid crystal panel 3 are adhered by the adhesive sheet 12. Here, the term “adhesion” means adhesion that can be easily peeled off manually.

  In FIG. 5, the liquid crystal panel 3 includes a first translucent substrate 13 that is one substrate, a second translucent substrate 14 that is the other substrate, and an outer side of the first translucent substrate 13. It has the polarizing plate 15a stuck on the surface, and the polarizing plate 15b stuck on the outer surface of the 2nd translucent board | substrate 14. FIG. The first translucent substrate 13 is made of, for example, glass, plastic or the like having a thickness of 0.2 mm. The second light transmissive substrate 14 is made of, for example, glass or plastic having a thickness of 0.1 mm. The polarization transmission axis of the polarizing plate 15a and the polarization transmission axis of the polarizing plate 15b are set in a state of being appropriately shifted in angle according to the operation mode of the liquid crystal panel. In addition to the polarizing plates 15a and 15b, other optical elements such as a retardation plate may be provided.

  The first translucent substrate 13 has an overhanging portion 18 that projects to one outer side of the second translucent substrate 14. An elongated rectangular parallelepiped driving IC 17 is mounted on the surface of the overhang portion 18 by COG (Chip On Glass) technology using an ACF (Anisotropic Conductive Film) 20. As shown in FIG. 2A, an inspection terminal 19 is provided on the surface of the projecting portion 18 on the second light transmitting substrate 14 side. One inspection terminal 19 is provided in the vicinity of one side 18a of the overhang portion 18 and in the vicinity of the other side 18b. More specifically, the inspection terminal 19 is the short side of the driving IC 17 (the left and right sides in FIG. 2A) and the side of the first translucent substrate 13, and the driving IC 17. It is provided in the area | region between the side sides (namely, the side sides 18a and 18b of the overhang | projection part 18) nearest to this side.

  The inspection terminal 19 is a terminal used when performing a display inspection of the liquid crystal panel 3. For example, in the process of manufacturing the liquid crystal panel 3, after the first light transmitting substrate 13 and the second light transmitting substrate 14 are bonded to each other and before the wiring substrate is mounted on the liquid crystal panel 3, the inspection is performed. A display test is performed by inputting an electrical signal to the single liquid crystal panel 3 using the terminal 19. The inspection terminal 19 is not used in the liquid crystal display device 1 after becoming a product.

  Although not shown in detail, electrodes are provided on the mutually facing surfaces of the first light-transmitting substrate 13 and the second light-transmitting substrate 14 constituting the liquid crystal panel 3, and further, a liquid crystal is provided between the substrates. Is enclosed. In FIG. 5, when planar light is supplied from the lighting device 5 to the liquid crystal panel 3, the liquid crystal passes through the liquid crystal panel 3 by controlling the voltage applied to a pair of electrodes facing each other inside the liquid crystal panel 3. The light to be modulated is modulated for each pixel. By passing the modulated light through the polarizing plate 15b, images such as letters, numbers, and figures are displayed on the light exit side of the polarizing plate 15b. The direction indicated by the arrow A is the direction in which the display on the liquid crystal panel 3 is observed, and the surface on which the polarizing plate 15b is provided is the display surface S0.

  The liquid crystal panel 3 can be constituted by a liquid crystal panel in any display mode. For example, in terms of a liquid crystal driving method, either a simple matrix method or an active matrix method may be used. As for the type of liquid crystal mode, TN (Twisted Nematic), STN (Super Twisted Nematic), liquid crystal having negative dielectric anisotropy (that is, liquid crystal for vertical alignment), or any other liquid crystal may be used. it can. As for the daylighting method, any of a reflection type, a transmission type, and a transflective type for both transmission and reflection may be used.

  The reflection type is a method in which external light such as sunlight or room light is reflected inside the first liquid crystal panel 3 and used for display. Further, the transmission type is a method for performing display using light transmitted through the liquid crystal panel 3. The transflective type is a method that can selectively perform both reflective display and transmissive display. In this embodiment, since the illumination device 5 is provided as a backlight, a transmissive type or a transflective type is adopted as the daylighting method.

  The simple matrix method is a matrix method in which each pixel does not have an active element, the intersection between the scanning electrode and the data electrode corresponds to a pixel or a dot, and a drive signal is directly applied. As the liquid crystal mode for this method, TN, STN, vertical alignment mode or the like is used. Next, in the active matrix method, an active element is provided for each pixel or dot, the active element is turned on in the writing period and the data voltage is written, and the active element is turned off in other periods. Is a matrix method. Active elements used in this method include a three-terminal type and a two-terminal type. An example of a three-terminal active element is a TFT (Thin Film Transistor). An example of a two-terminal active element is a TFD (Thin Film Diode).

  In the liquid crystal panel 3, when performing color display, a color filter is provided on one of the pair of substrates. The color filter is formed by a plurality of filters that selectively transmit light in a specific wavelength range. For example, the three primary colors R (red), G (green), and B (blue) are arranged in a predetermined arrangement, for example, a stripe arrangement, a delta arrangement, and a mosaic arrangement, corresponding to each pixel on the substrate. Formed by. If a clear color is desired, one pixel can be constituted by four colors obtained by adding other colors (for example, bluish green) to R, G, and B.

  Next, in FIG. 1, the frame 2 is formed by a molding technique using a resin as a material, and includes a panel housing portion 21, a light guide housing portion 22, and an LED support portion 23. The panel accommodating portion 21 is a space formed inside the frame 2, and the liquid crystal panel 3 is accommodated in this space. The light guide accommodating portion 22 is a space corresponding to the opening of the frame 2, and the light guide 7 is accommodated in the light guide accommodating portion 22. The LED support portion 23 is a recess formed on the surface of the frame 2, and the LED 6 mounted on the FPC board 10 is supported by the LED support portion 23. A portion of the frame 2 on the tip side of the LED support portion 23 is a space for escaping circuit elements formed on the IC mounting area A0 when the FPC board 10 is mounted on the frame 2.

  Next, the first outer frame 4a and the second outer frame 4b drawn separately in the vertical direction in FIG. 1 are formed using a metal such as stainless steel, for example. The first outer frame 4 a is formed in a frame shape having an opening 25 having substantially the same size as the display area V of the liquid crystal panel 3. The second outer frame 4b is formed in a bottomed, square dish shape having no opening.

  The first outer frame 4a is provided with a plurality of fitting portions 26a. The second outer frame 4b is provided with a plurality of fitting portions 26b. The fitting portion 26a and the fitting portion 26b are provided at positions corresponding to each other, and the fitting portion 26a and the fitting portion 26b are fitted in a state where the liquid crystal display device 1 is assembled as shown in FIG. Then, the first outer frame 4a and the second outer frame 4b are joined together.

  In FIG. 1, a double-sided adhesive member 28 is provided between the first outer frame 4 a and the liquid crystal panel 3. In the present embodiment, the double-sided adhesive member 28 is formed in an endless annular shape (that is, a frame shape). The double-sided pressure-sensitive adhesive member 28 is formed by forming a layer of an adhesive material with a uniform thickness on both the front and back surfaces of an endless and annular base member. The thickness of the double-sided pressure-sensitive adhesive member 28 is set to the same thickness as that of the second translucent substrate 14, which is 0.1 mm in this embodiment. However, the double-sided adhesive member 28 may be formed slightly thicker than the second translucent substrate 14.

  The adhesive surface on the first outer frame 4a side of the double-sided adhesive member 28 is a strong adhesive surface, and the adhesive surface on the liquid crystal panel 3 side is a weak adhesive surface. A strong adhesive surface is a surface having a stronger adhesive force than a weak adhesive surface. The reason why the liquid crystal panel 3 side of the double-sided adhesive member 28 is a weakly adhesive surface is that when a defect is found in the liquid crystal panel 3 or when a defect occurs in the liquid crystal panel 3, the liquid crystal panel 3 is placed in the first outer frame 4a. This is because the first outer frame 4a can be reused (so-called rework) by allowing the first outer frame 4a to be removed without difficulty with a manual force. This means that the strong adhesive force on the first outer frame 4a side of the double-sided adhesive member 28 is stronger than the weak adhesive force on the liquid crystal panel 3 side. Note that the strong adhesive force may be a firm bond that cannot be peeled off manually.

  FIG. 2B is a plan view when the first outer frame 4a and the double-sided adhesive member 28 adhered thereto are viewed from the direction of arrow A in FIG. In FIG.2 (b), the double-sided adhesive member 28 is adhere | attached on the back surface of the 1st outer frame 4a. Although the first outer frame 4a is formed in a frame shape having an opening 25, the band-shaped portions 28a and 28b on the side portions of the double-sided pressure-sensitive adhesive member 28 are formed to have substantially the same width as the side portions of the first outer frame 4a. The shape fits on the side. In FIG. 1, when the first outer frame 4 a is assembled to the frame 2 across the liquid crystal panel 3, the inner peripheral area portion of the double-sided adhesive member 28 overlaps with the outer peripheral area of the second translucent substrate 14 of the liquid crystal panel 3. Adhere (ie adhere). In addition, the outer peripheral area portion of the double-sided adhesive member 28 overlaps and adheres (adheres) to the portion extending upward in the outer peripheral area of the frame 2. That is, in this embodiment, the double-sided adhesive member 28 overlaps and adheres to both the liquid crystal panel 3 and the frame 2. However, the double-sided adhesive member 28 may only overlap the frame 2 alone.

  The side portion of the double-sided adhesive member 28 on the protruding portion 18 side is formed thin so as not to hit the driving IC 17 when assembled to the liquid crystal panel 3. However, extended portions 29 extending outward are provided at both end portions. When the double-sided pressure-sensitive adhesive member 28 is assembled to the liquid crystal panel 3, these extending portions 29 are projected to the projecting portion 18 of the liquid crystal panel 3 so as to overlap and adhere (adhere) to the inspection terminals 19.

  When assembling the liquid crystal display device 1 of FIG. 1, first, the light guide 7 of the illumination device 5 is accommodated in the light guide accommodating portion 22 in the frame 2, and then the liquid crystal panel is placed in the panel accommodating portion 21. 3 is accommodated. At this time, the liquid crystal panel 3 is adhered to the light guide 7 and the frame 2 by the adhesive sheet 12. The liquid crystal panel 3 and the light guide 7 thus mounted are always positioned at fixed positions in the frame 2.

  Next, the FPC board 10 is bent toward the back side of the liquid crystal panel 3 as indicated by an arrow B, and the LED mounting area A0 on which the LED 6 is mounted is disposed so as to face the LED support portion 23 of the frame 2. Further, the side portion provided with the input terminal 11 is bent from the side to the back surface of the frame 2 as indicated by an arrow C, and the input terminal 11 is disposed so as to protrude toward the front side of the frame 2. The second outer frame 4b is mounted on the bottom surface side of the frame 2 in a state where the liquid crystal panel 3 is accommodated in the frame 2 as described above. Then, the first outer frame 4 a is attached to the liquid crystal panel 3 side of the frame 2. At this time, the double-sided adhesive member 28 is adhered to the inner surface of the first outer frame 4a in advance as shown in FIG.

  In FIG. 1, when the second outer frame 4b is mounted on the bottom surface of the frame 2 and the first outer frame 4a is mounted on the upper surface of the frame 2, the fitting portion 26a of the first outer frame 4a and the second outer frame 4b The outer frame 4 is configured by fitting with the fitting portion 26b. Thus, the liquid crystal display device 1 is completed.

  In the liquid crystal display device 1 of the present embodiment, an image displayed in the display area V of the liquid crystal panel 3 can be visually recognized through the opening 25 provided in the first outer frame 4a. At the time of manufacturing the liquid crystal panel 3, it is possible to inspect the lighting of the liquid crystal panel 3 by applying a predetermined inspection signal to the inspection terminal 19, and to inspect constituent elements such as electrodes, wirings, switching elements and the like. it can. The inspection terminal 19 is an unnecessary terminal after the product is completed. However, if the inspection terminal 19 is exposed to the outside, there is a possibility that a defect such as corrosion may occur due to an external environment such as humidity. In the present embodiment, when the liquid crystal display device 1 is completed, as shown in FIG. 4, the extending portion 29 of the double-sided adhesive member 28 adheres to the inspection terminal 19 and covers the inspection terminal 19. The extension part 29 can prevent the terminal 19 from touching the external environment. Thereby, it is possible to prevent the liquid crystal panel 3 from being defective due to the inspection terminal 19.

  Since the extended portion 29 of the double-sided adhesive member 28 adheres to the inspection terminal 19 to cover the inspection terminal 19, the extended portion 29 is displaced from the inspection terminal 19 even when an external force is applied to the outer frame 4. Therefore, the inspection terminal 19 can be reliably covered. Therefore, the inspection terminal 19 is reliably protected from the external environment such as moisture over a long period of time.

  In the conventional method for covering the inspection terminal based on the resin mold, the thickness of the resin mold cannot be reduced. However, in the conventional liquid crystal display device, since the thickness of the substrate constituting the liquid crystal panel is as thick as about 0.5 mm, there is no problem even if the resin mold is formed thick on the inspection terminal. However, when the thin substrate 14 is used as in this embodiment, it is impossible to cover the inspection terminal with a resin mold. On the other hand, if the inspection terminal 19 is covered with the thin double-sided adhesive member 28 as in the present embodiment, the liquid crystal display device can be thinned.

  In the present embodiment, in FIG. 1, an extension portion 29 is formed on the double-sided adhesive member 28, and the inspection terminal 19 is covered with the extension portion 29, thereby protecting the inspection terminal 19 from external moisture and the like. It was to be. Since the extending portion 29 can be formed without any trouble when forming the shape of the double-sided adhesive member 28, the extending portion 29 can be formed very easily. In addition, the operation of disposing the double-sided adhesive member 28 at a position covering the inspection terminal 19 is not a special operation, but simply assembling the first outer frame 4a to the liquid crystal panel 3 and the frame 2 in the conventional manner. Just do the work. Therefore, the worker can perform the covering process on the inspection terminal 19 only by assembling the liquid crystal module without performing any special work.

  In the present embodiment, the double-sided adhesive member 28 adhered to the inner surface of the first outer frame 4 a is adhered to the inspection terminal 19 on the substrate 13. This is nothing but integrating the substrate 13 and the first outer frame 4a by the double-sided adhesive member 28. Furthermore, the double-sided adhesive member 28, on the other hand, integrates the first outer frame 4a and the frame 2 by adhesion. Therefore, in this embodiment, the double-sided pressure-sensitive adhesive member 28 integrates the three points of the first outer frame 4a, the substrate 13, and the frame 2 by adhesion. Thus, if the three points of the first outer frame 4a, the substrate 13, and the frame 2 are integrated, the frame 2 and the liquid crystal panel 3 will not vibrate or move around in the outer frame 4, Therefore, they can be reliably protected from damage.

  As can be understood from FIG. 1, in the projecting portion 18 of the first translucent substrate 13 in the liquid crystal panel 3, the driving IC 17 mounted on the projecting portion 18 protrudes above the projecting portion 18. It is conceivable that a space is created around the periphery when the assembly of the liquid crystal display device 1 is completed. Such a space may cause unnecessary vibration or unnecessary movement in the liquid crystal panel 3, and is not preferable. In this embodiment, as shown in FIG. 4, since the double-sided adhesive member 28 is provided in the region where the inspection terminal 19 is provided, that is, the peripheral region of the driving IC 17, such a space is double-sided. It is filled with the member 28, that is, the elastic member, and it is possible to reliably prevent unnecessary vibrations and the like from being generated in the liquid crystal panel 3. Moreover, since the double-sided adhesive member 28 is not simply in contact with both the first outer frame 4a and the substrate overhanging portion 18, but is adhered, it is possible to reliably prevent the occurrence of unnecessary vibration and the like.

(Other embodiments)
The present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to the embodiments, and various modifications can be made within the scope of the invention described in the claims.

For example, in the above embodiment, as shown in FIG. 2A, the inspection terminal 19 is provided in the side region of the driving IC 17, but this is a substrate overhanging portion other than the side region of the driving IC 17. 18 can also be provided. In this case, it is necessary to change the shape of the extending portion 29 provided on the double-sided adhesive member 28 according to the position of the inspection terminal 19.
Next, in the above embodiment, the transmissive liquid crystal panel is configured by using the illumination device 5 as a backlight. Instead of this, a reflective liquid crystal panel can be used without using the illumination device 5.

  The present invention relates to an electro-optical device other than a liquid crystal display device, for example, an organic EL device, an inorganic EL device, a plasma display device (PDP), an electrophoretic display (EPD), a field emission display device (FED). (Field Emission Display) and other various electro-optical devices.

(First Embodiment of Electronic Device)
Hereinafter, an embodiment of an electronic apparatus according to the invention will be described. In addition, this embodiment shows an example of this invention and this invention is not limited to this embodiment. FIG. 6 shows an embodiment of an electronic apparatus according to the invention. The electronic apparatus shown here includes a liquid crystal device 101 as an electro-optical device and a control circuit 102 that controls the liquid crystal device 101. The liquid crystal device 101 includes a liquid crystal panel 103 and a drive circuit 104. The control circuit 102 includes a display information output source 105, a display information processing circuit 106, a power supply circuit 107, and a timing generator 108.

  The display information output source 105 includes a memory such as a RAM (Random Access Memory), a storage unit such as various disks, a tuning circuit that tunes and outputs a digital image signal, and various clock signals generated by the timing generator 108. The display information processing circuit 106 is supplied with display information such as a predetermined format image signal.

  The display information processing circuit 106 includes a number of well-known circuits such as an amplification / inversion circuit, a rotation circuit, a gamma correction circuit, a clamp circuit, and the like, executes processing of input display information, and converts an image signal into a clock signal CLK. At the same time, it is supplied to the drive circuit 104. Here, the drive circuit 104 is a generic term for an inspection circuit and the like together with a scanning line drive circuit and a data line drive circuit. The power supply circuit 107 supplies a predetermined power supply voltage to each of the above components.

  The liquid crystal device 101 can be configured using, for example, the liquid crystal device 1 shown in FIG. According to the liquid crystal device 1, a thin double-sided adhesive member for adhering the outer frame to the frame was used as a member for covering the inspection terminal provided on the substrate to protect it from moisture and the like. Therefore, the thickness of the liquid crystal device 1 can be made very thin by using a thin plate as a substrate constituting the liquid crystal panel in the liquid crystal device 1. Therefore, if the liquid crystal device 1 of FIG. 1 is used as the liquid crystal device 101 according to the present embodiment, the electronic apparatus of the present embodiment can be thinly formed. Alternatively, a space can be provided in the space around the liquid crystal device 101 in the electronic device.

(Second Embodiment of Electronic Device)
FIG. 7 shows a mobile phone which is another embodiment of the electronic apparatus according to the present invention. A cellular phone 110 shown here includes a main body 111 and a display body 112 that can be opened and closed with respect to the main body 111. The display unit 112 is provided with a display device 113 and a receiver 114. Various displays relating to telephone communication are displayed on the display screen 115 of the display device 113. A control unit for controlling the operation of the display device 113 is stored inside the main body unit 111 or the display body unit 112 as a part of the control unit that controls the entire mobile phone or separately from the control unit. The The main body 111 is provided with an operation button 116 and a transmitter 117.

  The display device 113 can be configured using, for example, the liquid crystal device 1 shown in FIG. According to the liquid crystal device 1, a thin double-sided adhesive member for adhering the outer frame to the frame was used as a member for covering the inspection terminal provided on the substrate to protect it from moisture and the like. Therefore, the thickness of the liquid crystal device 1 can be made very thin by using a thin plate as a substrate constituting the liquid crystal panel in the liquid crystal device 1. Therefore, if the liquid crystal device 1 of FIG. 1 is used as the liquid crystal device 101 according to the present embodiment, the mobile phone 110 of the present embodiment can be formed thin. This greatly contributes to the recent trend of thinning mobile phones.

1 is a perspective view showing a liquid crystal display device, which is an embodiment of an electro-optical device according to the invention, in an exploded state. FIG. FIG. 2 is a plan view of a main part of the liquid crystal display device of FIG. 1, (a) showing a liquid crystal panel, and (b) showing a first outer frame. It is side surface sectional drawing of a part of liquid crystal display device of FIG. It is side surface sectional drawing of the other part of the liquid crystal display device of FIG. FIG. 10 is a side cross-sectional view of still another part of the liquid crystal display device of FIG. 1. It is a block diagram which shows one Embodiment of the electronic device which concerns on this invention. It is a perspective view which shows the mobile telephone which is one Embodiment of the electronic device which concerns on this invention.

Explanation of symbols

1. 1. liquid crystal display device (electro-optical device), Frame (support frame),
3. 3. Liquid crystal panel (electro-optical panel) Outer frame, 5. 5. lighting device; LED,
7). Light guide, 10. 10. FPC board Terminal, 12. Adhesive sheet,
13. First translucent substrate, 14. 2nd translucent board | substrate, 15a, 15b. Polarizer,
17. Driving IC, 18. Overhang, 18a, 18b. Side of the board,
19. Inspection terminal, 20. ACF, 21. 21. Panel housing part Light guide housing part,
23. LED support part, 25. Openings, 26a, 26b. Fitting portion,
28. Double-sided adhesive member, 28a, 28b. Side band, 29. Extension,
101. Liquid crystal device (electro-optical device), 102. Control circuit,
103. Liquid crystal panel (electro-optical panel), 104. Drive circuit,
110. Mobile phone (electronic device), 113. Display device, A0. IC mounting area,
S0. Display surface, V. Indicated Area

Claims (10)

An electro-optical panel that is formed by bonding a pair of substrates, one of the pair of substrates has a projecting portion that projects from the other substrate, the projecting portion includes an inspection terminal, and displays an image in a display area When,
A support frame for supporting the electro-optical panel;
An outer frame that accommodates the electro-optical panel and the support frame and has an opening corresponding to the display area;
A double-sided pressure-sensitive adhesive member provided in a peripheral region outside the opening and provided between the outer frame and the support frame;
The electro-optical device, wherein the double-sided adhesive member has one surface adhered to the support frame, the other surface adhered to the outer frame, and further covers the inspection terminal.   2. The electro-optical device according to claim 1, wherein the double-sided adhesive member is sandwiched between the outer frame and the support frame, and between the outer frame and a region where the inspection terminal of the overhang portion is formed. An electro-optical device that is pressed.   3. The electro-optical device according to claim 1, wherein the double-sided adhesive member also adheres to a peripheral region of the electro-optical panel.   4. The electro-optical device according to claim 3, wherein the double-sided adhesive member is sandwiched and pressed between the outer frame and the electro-optical panel.   5. The electro-optical device according to claim 1, wherein the double-sided pressure-sensitive adhesive member is provided in an endless annular shape in a peripheral region outside the opening, and a part thereof extends to perform the inspection. An electro-optical device that covers a terminal for use.   2. The electro-optical device according to claim 1, wherein the double-sided adhesive member fills a space between the one substrate on which the inspection terminal is formed and the outer frame in a state of covering the inspection terminal. Electro-optic device.   7. The electro-optical device according to claim 6, wherein a thickness of the double-sided adhesive member in a natural state is equal to or greater than a thickness of the other substrate.   8. The electro-optical device according to claim 1, wherein a surface of the double-sided adhesive member that adheres to the outer frame is a strong adhesive surface, and a surface on the opposite side is a weak adhesive surface. An electro-optical device.   9. The electro-optical device according to claim 1, further comprising: a driving IC mounted on the one substrate, wherein the inspection terminal is a side of the driving IC. And an electro-optical device which is provided between the side of the one substrate and the side closest to the side of the driving IC.   An electronic apparatus comprising the electro-optical device according to claim 1.

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