JP2010145546A - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display which is compact as a whole. <P>SOLUTION: The liquid crystal display 1 includes an upper liquid crystal cell 21 comprising an upper glass substrate 23, a lower glass substrate 28, an upper transparent electrode 25, a lower transparent electrode 27 and an upper liquid crystal layer 26; a lower liquid crystal cell 31 comprising an upper glass substrate 33, a lower glass substrate 38, an upper transparent electrode 35, a lower transparent electrode 37 and a lower liquid crystal layer 36; and a connection pin 10 having a U-shaped abutting part 18 formed therein. The connection pin 10 brings the abutting part 18 into contact with the lower transparent electrode 27 and an under face of the upper glass substrate 33 coming out from the upper transparent electrode 35, clamps integrally end parts of the lower glass substrate 28 and the upper glass substrate 33 vertically by the abutting part 18, to connect the lower transparent electrode 27 electrically to the abutting part 18, and brings the abutting part 18 into contact with the upper transparent electrode 35 and a top face of the lower glass substrate 28 coming out from the lower transparent electrode 27, to connect the upper transparent electrode 35 electrically to the abutting part 18. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device in which a liquid crystal layer made of liquid crystal molecules is formed.

  In general, the liquid crystal display device is configured by forming a liquid crystal layer composed of liquid crystal molecules between two opposed glass substrates, and an electrode exposed at an end of the glass substrate and the printed circuit board are electrically connected by, for example, a connection pin. Is done. In such a liquid crystal display device, a first liquid crystal cell and a second liquid crystal cell in which a liquid crystal layer is formed are provided one above the other so that one is a display liquid crystal cell and the other is a phase compensation liquid crystal cell. Thus, there is a display that has a small color change and a high contrast when viewed from an oblique direction. For example, FIG. 1 of Patent Document 1 discloses a liquid crystal display device in which an A layer as a display liquid crystal cell and a B layer as a phase compensation liquid crystal cell are stacked one above the other.

  FIG. 10 shows a conventional liquid crystal display device 500 configured by stacking two liquid crystal cells vertically. The liquid crystal display device 500 mainly includes an upper liquid crystal cell 520 in which an upper liquid crystal layer 521 is formed, a lower liquid crystal cell 550 in which a lower liquid crystal layer 551 is formed, and connection pins 610 and 650. In the upper liquid crystal cell 520, the lower transparent electrode 530 is exposed on the upper surface of the end portion of the lower glass substrate 540, and the end portion of the lower transparent electrode 530 and the connection pin 610 are in contact with each other for electrical connection. Also in the lower liquid crystal cell 550, the lower transparent electrode 560 exposed on the upper surface of the end portion of the lower glass substrate 570 and the connection pin 650 are in contact with each other and are electrically connected. The lower ends of these connection pins 610 and 650 are electrically connected to the printed circuit board 800.

As shown in FIG. 10, the upper portion of the connection pin 610 is formed in a “U” shape in a side view, and this portion is inserted so as to sandwich the end portion of the lower glass substrate 540 so as to be electrically connected to the lower transparent electrode 530. After the connection, the conductive paste 720 and the pin fixing resin 710 are applied and fixed. Similarly, in the back side liquid crystal cell 550, the lower transparent electrode 560 and the connection pin 650 are electrically connected, and the conductive paste 720 and the pin fixing resin 710 are applied.
JP-A-11-271751

  In general, as described above, in each of the liquid crystal cells 520 and 550 as described above, the transparent electrodes 530 and 560 are exposed on the upper surfaces of the lower glass substrates 540 and 570 and are electrically connected to the connection pins 610 and 650. It was. Therefore, in the connection portion between the lower transparent electrode 560 and the connection pin 650, it is necessary to secure a vertical space in order to apply the conductive paste 720 and the pin fixing resin 710 to form the connection portion. A thick glass substrate (for example, about 1.1 mm) has been used. For this reason, there is a problem that the liquid crystal display device 500 as a whole becomes thick in the vertical direction.

  Similarly, in the case of the configuration using one liquid crystal cell, conventionally, a transparent electrode is generally exposed on the upper surface of the lower glass substrate and electrically connected to the connection pin. By the way, recently, there is a request to quickly start the display in a liquid crystal display device even in a low-temperature usage environment. In order to meet this demand, for example, a transparent electrode heater is used in addition to the transparent electrode, and each electrode is set. There is also a problem that the arrangement configuration of the electrodes becomes complicated when it is exposed to the same surface of the lower glass substrate (for example, the lower surface of the lower glass substrate) and is electrically connected to the connection pin.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a liquid crystal display device having a simple electrode arrangement while having a compact configuration as a whole.

  In order to achieve the above object, a liquid crystal display device according to the present invention includes a pair of upper substrates arranged in parallel to each other, and a pair of upper electrodes formed on surfaces of the pair of upper substrates facing each other (for example, the embodiment). An upper liquid crystal cell composed of an upper transparent electrode 25 and a lower transparent electrode 27) in FIG. 4 and the like, and an upper liquid crystal layer (for example, the upper liquid crystal layer 26 in the embodiment) sealed between the upper electrodes, are parallel to each other. A pair of lower substrates, a pair of lower electrodes (for example, the upper transparent electrode 35 and the lower transparent electrode 37 in the embodiment) formed on opposite surfaces of the pair of lower substrates, and the lower A lower liquid crystal cell (for example, the lower liquid crystal layer 36 in the embodiment) enclosed between the side electrodes, the lower liquid crystal cell positioned below the upper liquid crystal cell, and the upper electrode or the A liquid crystal display device having a connection pin electrically connected to a side electrode, wherein the pair of upper substrates is an upper upper substrate (for example, the upper glass substrate 23 in the embodiment) positioned on the upper side, and An upper lower substrate (e.g., lower in the embodiment) is formed such that an upper connection end formed on the upper surface of the upper electrode and located on the upper side of the upper upper substrate protrudes laterally with respect to the upper upper substrate. A pair of lower substrates, a lower lower substrate (for example, the lower glass substrate 38 in the embodiment) positioned on the lower side, and a lower surface positioned on the upper side of the lower lower substrate. The lower connection end on which the lower electrode is formed is formed of a lower upper substrate (for example, the upper glass substrate 33 in the embodiment) formed so as to protrude laterally with respect to the lower lower substrate. , The connection pin is formed by forming a U-shaped sandwiching portion (for example, the contact portion 18 in the embodiment) in a side view, and the connection pin is formed on the upper surface of the upper connection end portion. The upper connection end and the lower connection end that are positioned one above the other so that the sandwiching portion is brought into contact with the upper electrode and a portion of the lower surface of the lower upper substrate that is out of the lower electrode. The upper electrode and the sandwiching portion can be electrically connected to each other with the sandwiching portion sandwiched in the vertical direction, and the lower electrode formed on the lower surface of the lower connection end portion and the upper lower substrate The upper electrode and the lower connection end are vertically sandwiched between the upper electrode and the lower electrode in such a manner that the holding portion is brought into contact with a portion of the upper surface where the upper electrode is removed. It is possible to make electrical connection with the clamping part. Made.

  In order to achieve the above object, a liquid crystal display device according to the present invention includes a pair of substrates arranged in parallel to each other, a pair of display electrodes formed on mutually opposing surfaces of the pair of substrates, and the display A liquid crystal cell composed of a liquid crystal layer sealed between electrodes for display, a display auxiliary electrode (for example, the transparent electrode heater 29 in the embodiment) provided on the lower surface of the liquid crystal cell, the display electrode or the display auxiliary electrode And a pair of substrates electrically connected to each other, wherein the pair of substrates includes an upper substrate positioned on the upper side and an upper surface positioned on the lower side of the upper substrate for the display. The connection end portion having an electrode formed thereon and the display auxiliary electrode formed on the lower surface is formed of a lower substrate formed to protrude laterally with respect to the upper substrate, and the connection pin has a U-shape in a side view. A sandwiching portion is formed, and the connection pin is formed between the display electrode formed on the upper surface of the connection end portion and a portion of the lower surface of the lower substrate from which the display auxiliary electrode is removed. The display electrode and the sandwiching portion can be electrically connected by sandwiching the connection end portion in the vertical direction with the sandwiching portion so as to contact the display end, and the display formed on the lower surface of the connection end portion The display auxiliary electrode and the display electrode are sandwiched between the auxiliary electrode and the upper surface of the lower substrate by sandwiching the connection end portion in the vertical direction with the holding portion in contact with the portion where the display electrode is removed. It is comprised so that electrical connection is possible with a clamping part.

  In the above-described liquid crystal display device, the holding portion of the connection pin includes a plate-like upper holding plate (for example, the upper connecting portion 12 in the embodiment) and a plate-like lower holding member that is vertically opposed to the upper holding plate. It consists of a plate (for example, the lower connecting portion 13 in the embodiment), and the upper sandwiching plate and the lower sandwiching plate have paste openings (for example, paste gaps 12a and 13a in the embodiment) penetrating vertically. The paste opening has conductivity in a connection portion where the sandwiching portion and the upper electrode, the lower electrode, the display electrode, or the display auxiliary electrode are in contact with and electrically connected to each other. It is preferable that a fixing resin is applied so as to cover the conductive paste, the upper holding plate, and the lower holding plate to which the conductive paste is applied.

  The conductive paste is preferably applied by being discharged by a paste discharge device capable of discharging the droplet-shaped conductive paste.

  Furthermore, the conductive paste preferably has a property of being cured by being irradiated with ultraviolet rays.

  In the liquid crystal display device according to the present invention, the end portions of the upper lower substrate and the lower upper substrate are vertically sandwiched between the pin portions of the connection pins, and the upper electrode formed on the upper surface of the upper lower substrate is brought into contact with the sandwich portion. By doing so, the upper electrode and the connection pin can be electrically connected, and the lower electrode formed on the lower surface of the lower upper substrate and the clamping portion can be brought into contact with each other so that the lower electrode and the connection pin can be electrically connected. It is configured. With this configuration, the lower liquid crystal cell is formed by sandwiching the end portions of the upper lower substrate and the lower upper substrate in the vertical direction with the pinching portions of the connection pins with the lower electrode exposed on the lower surface of the lower upper substrate. It becomes possible to electrically connect the lower electrode and the connection pin. By the way, in the conventional configuration, it is necessary to secure a vertical space at the joint portion between the transparent electrode and the connection pin of the lower liquid crystal cell. However, according to the liquid crystal display device of the present invention, the space is ensured. There is no need. Therefore, it becomes possible to configure a liquid crystal display device using a thin glass substrate (for example, about 0.55 mm) as compared with the conventional configuration. Therefore, the liquid crystal display device can be configured to be thin and compact as a whole.

  Further, the liquid crystal display device according to the present invention sandwiches the end portion of the lower substrate in the vertical direction by the holding portion of the connection pin, and brings the display electrode formed on the upper surface of the lower substrate into contact with the holding portion. The display electrode and the connection pin can be electrically connected, and the display auxiliary electrode formed on the lower surface of the lower substrate and the sandwiching portion are brought into contact with each other so that the display auxiliary electrode and the connection pin can be electrically connected. With such a configuration, the arrangement configuration of each electrode is complicated by exposing both the upper surface and the lower surface of the lower substrate without exposing both the display electrode and the display auxiliary electrode on the upper surface of the lower substrate. Each electrode and the connection pin can be electrically connected without any problem.

  It should be noted that the upper and lower clamping plates constituting the clamping portion are formed with paste openings penetrating vertically, and the conductive paste is applied to the connection portion where the clamping portion and each of the electrodes are in contact and electrically connected. Preferably it was applied. When configured in this manner, it is possible to easily and immediately inspect whether or not the connection pin and each electrode are reliably electrically connected by confirming the application state of the conductive paste applied to the paste opening.

  The conductive paste is preferably applied by being discharged by a paste discharge device capable of discharging a droplet-shaped conductive paste. If comprised in this way, it will become possible to apply | coat the conductive paste of a uniform quantity (particle size) to each connection part of a connection pin and the said electrode, and can improve the reliability of the electrical connection of a connection pin and each electrode. It becomes possible.

  Furthermore, the conductive paste preferably has a property of being cured by being irradiated with ultraviolet rays. In the case of this configuration, for example, the applied conductive paste can be reliably cured in a relatively short time by irradiating with an ultraviolet ray using an ultraviolet irradiation device, and the electrical connection between the connection pin and each electrode can be achieved. Reliability can be further improved.

  Hereinafter, preferred embodiments of the present invention will be described with reference to Examples 1 and 2 with reference to the drawings. For convenience of explanation, the arrow directions shown in the drawings are defined as front and rear, left and right, and up and down.

  First, components of the liquid crystal display device 1 according to the first embodiment will be described with reference to FIGS. 1 is an overall view of the liquid crystal display device 1, FIG. 2 is a partially enlarged view of the liquid crystal display device 1, FIG. 3 is a perspective view of a connection pin 10 described later, and FIGS. 4 and 5 are cross sections of the liquid crystal display device 1. Each figure is shown.

  As shown in FIGS. 1A and 1B, the liquid crystal display device 1 includes a device body 20 and a plurality of connection pins 10 that connect the device body 20 and a printed circuit board 99. As can be seen from FIG. 2A, the connection pins 10 are attached to the front end of the apparatus main body 20 side by side at regular intervals, and details of this attachment procedure will be described later.

  As shown in FIG. 3, the connection pin 10 is formed by, for example, pressing a plate-shaped metal material, and has an abutting portion 18 formed in a U shape in a side view in the upper portion, and the abutting portion. It is comprised mainly by the support part 14 connected with 18 and extended below. The abutting portion 18 has a flat base portion 11 formed on the front side thereof, the two upper connecting portions 12 and 12 are curvedly extended from the upper end portion of the base portion 11 toward the rear, and the lower end portion of the base portion 11. The two lower connecting portions 13, 13 extend in a curved manner from the rear.

  A paste gap 12 a is formed between the upper connection portions 12, 12, and a paste gap 13 a is formed between the lower connection portions 13, 13. The lower end portion of the support portion 14 is electrically connected to the printed circuit board 99, and the support portion 14 is vertically moved in advance so that it can be adjusted according to the vertical distance between the apparatus main body 20 and the printed circuit board 99. It is formed long.

As shown in FIGS. 4 and 5, the apparatus main body 20 is mainly composed of an upper liquid crystal cell 21 and a lower liquid crystal cell 31, and in the following, the upper liquid crystal cell 21 is used for display and the lower liquid crystal cell 31 is used as a phase. A configuration for compensation will be described as an example.

  The upper liquid crystal cell 21 includes an upper polarizing plate 22, an upper glass substrate 23 disposed on the lower surface side of the upper polarizing plate 22, a lower glass substrate 28 disposed above and below the upper glass substrate 23, and an upper glass. An upper liquid crystal layer 26 sealed by a sealing member 24 in a gap between the substrate 23 and the lower glass substrate 28, an upper transparent electrode 25 provided on the lower surface of the upper glass substrate 23, and a lower provided on the upper surface of the lower glass substrate 28. The transparent electrode 27 is mainly used.

  The lower liquid crystal cell 31 includes an upper glass substrate 33 positioned on the lower side of the lower glass substrate 28, a lower glass substrate 38 disposed opposite to the upper glass substrate 33 in the vertical direction, and the upper glass substrate 33 and the lower glass substrate. The lower liquid crystal layer 36 sealed by the sealing member 24 in the gap with the upper surface 38, the upper transparent electrode 35 provided on the lower surface of the upper glass substrate 33, the lower transparent electrode 37 provided on the upper surface of the lower glass substrate 38, and the lower glass The lower polarizing plate 32 located below the substrate 38 is mainly configured.

  Each of the four glass substrates 23, 28, 33, and 38 is a planar substrate formed using, for example, transparent glass, and is capable of transmitting light. The upper liquid crystal layer 26 and the lower liquid crystal layer 36 are formed by laminating liquid crystal molecules having a regular alignment direction, for example, using a twisted nematic liquid crystal material, and have birefringence in the minor axis direction. An optically uniaxial birefringent crystal having no birefringence in the long axis direction.

  The upper polarizing plate 22 and the lower polarizing plate 32 are linear polarizing plates formed so that only linearly polarized light having vibration in a specific transmission axis direction can be transmitted. As the sealing member 24, a material having a property that liquid crystal molecules in the liquid crystal layers 26 and 36 do not permeate is used. The sealing member 24 prevents liquid liquid crystal molecules that are liquid from flowing out to the outside, The inflow of contaminants into the liquid crystal layers 26 and 36 can be prevented.

  In FIG.2 (b), the perspective view which extracted only the front-end part of each glass substrate is shown. As can be seen from this figure, the lower transparent electrode 27 is exposed to the upper surface side of the front end portion of the lower glass substrate 28 in a state of being arranged in the left and right with a predetermined width, and the upper transparent electrode 35 is lower side of the front end portion of the glass substrate 33. Is exposed. In a state where the apparatus main body 20 is assembled, the lower transparent electrode 27 and the upper transparent electrode 35 are formed so as to be shifted from side to side so as not to face each other in the vertical direction. Further, the upper transparent electrode 25 and the lower transparent electrode 27 are formed in a pair of upper and lower sides, and are formed so as to have a desired display pattern when the apparatus main body 20 is viewed from above (FIG. 1A). reference). FIG. 1A illustrates a configuration in which the upper transparent electrode 35 is exposed for three portions from the left and right ends, and the lower transparent electrode 27 is exposed on the inner side, but this configuration is appropriately designed. It can be changed.

  In the liquid crystal display device 1 composed of such components, an assembly configuration of the device body 20 will be described. As shown in FIGS. 4 and 5, the upper glass substrate 33 is positioned below the lower glass substrate 28, and the upper liquid crystal cell 21 and the lower liquid crystal cell 31 are vertically overlapped. The lower glass substrate 28 protrudes forward with respect to the upper glass substrate 23, and the upper glass substrate 33 protrudes forward with respect to the lower glass substrate 38. On the upper surface side of the front end portion of the lower glass substrate 28 protruding forward, the lower transparent electrodes 27 are exposed side by side at predetermined left and right positions. Further, on the lower surface side of the front end portion of the upper glass substrate 33, upper transparent electrodes 35 are exposed side by side at predetermined left and right positions.

  While the constituent members of the liquid crystal display device 1 have been described above, the attachment procedure for attaching the connection pins 10 to the device main body 20 will be described in detail below.

  The contact portion 18 of the connection pin 10 is inserted into the front end portions of the lower glass substrate 28 and the upper glass substrate 33 and sandwiched vertically between the upper connection portion 12 and the lower connection portion 13 by the spring force of the connection pin 10. State. By doing so, the lower transparent electrode 27 exposed on the upper surface side of the front end portion of the lower glass substrate 28 is brought into contact with the upper connecting portions 12, 12, and the upper transparent electrode exposed on the lower surface side of the front end portion of the upper glass substrate 33. 35 and the lower connection portions 13 and 13 are brought into contact with each other to electrically connect them. For the portion where the upper connecting portions 12 and 12 are in contact with the lower transparent electrode 27 (the portion excluding three from the left and right ends), the paste is discharged toward the position of the paste gap 12a. A conductive paste 52 having conductivity, which is formed into fine droplets, is ejected and attached by an apparatus (not shown) (see FIGS. 2A and 5).

  Thereby, the upper connection parts 12 and 12 and the lower transparent electrode 27 are reliably connected by the electrically conductive paste 52, and the reliability of electrical connection can be improved. Further, since the conductive paste 52 is discharged and adhered toward the paste gap 12a, it is possible to easily and immediately inspect whether or not the electrical connection is reliably made by checking the state of adhesion of the conductive paste 52. .

  Similarly, the portion where the lower connecting portions 13 and 13 and the upper transparent electrode 35 are in contact (three from the left and right end portions) is also electrically conductive by the paste discharging device toward the position of the paste gap 13a. The paste 52 is discharged and adhered (see FIG. 2A and FIG. 4). By doing so, the lower connecting portions 13 and 13 and the upper transparent electrode 35 are reliably electrically connected by the conductive paste 52, and by confirming the adhesion state of the conductive paste 52 adhered to the paste gap 13 a, It is possible to inspect whether or not it is electrically connected.

  The conductive paste 52 contains conductive fine particles such as graphite, copper, silver, or gold, and is heat curable by heating, cured by natural drying, and ultraviolet rays. Any of the UV curing types that are cured by irradiation may be used. By using the above-mentioned UV curable conductive paste, it is possible to cure reliably and in a short time by irradiating ultraviolet rays from an ultraviolet irradiation device (not shown) as compared with, for example, spontaneous curing. It becomes.

  As described above, after the conductive paste 52 is adhered and sufficiently dried, the upper surface of the front end portion of the lower glass substrate 28 and the upper glass substrate 33 are covered so as to cover the upper connecting portions 12 and 12 and the lower connecting portions 13 and 13. For example, a transparent pin fixing resin 51 is applied and cured on the lower surface of the front end portion. By doing so, the connection pin 10 (contact portion 18) can be securely fixed to the apparatus main body 20. For example, even if an external force acts on the apparatus main body 20 and the connection pin 10, the lower transparent electrode 27 and It is possible to maintain the electrical connection with the upper connection parts 12 and 12 and the electrical connection between the upper transparent electrode 35 and the lower connection parts 13 and 13.

  After the pin fixing resin 51 is cured, the lower portion of the support portion 14 is cut and deleted in accordance with the vertical distance between the apparatus main body 20 and the printed circuit board 99, and the lower end portion of the support portion 14 and the printed circuit board 99 are electrically connected. Thus, the liquid crystal display device 1 can be driven. As the pin fixing resin 51, for example, a UV curable resin can be used.

  By the way, the conventional liquid crystal display device in which the upper liquid crystal cell and the lower liquid crystal cell overlap each other is exposed to the transparent electrode on the upper surface of the lower glass substrate in the lower liquid crystal cell and electrically connected to the connection pin. In order to provide an upper and lower gap for applying pin fixing resin to the connection portion, it is necessary to use a thick glass substrate, and as a whole, a thick liquid crystal display device (device main body) has been formed. On the other hand, in the liquid crystal display device 1 according to the present invention, as described above, the upper transparent electrode 35 in the lower liquid crystal cell 31 is exposed to the lower surface of the front end portion of the upper glass substrate 33 and is electrically connected to the connection pin 10. It has become. Therefore, it is not necessary to provide a gap for applying the pin fixing resin as in the conventional case, and it is possible to configure using a thin glass substrate (for example, about 0.55 mm). In addition, it can be configured to be thin and compact and can be reduced in weight.

  Conventionally, when attaching a connection pin to the main body of the apparatus, for example, after attaching the connection pin to the upper liquid crystal cell, the connection pin is attached to the lower liquid crystal cell in two steps. Had been installed. On the other hand, in the liquid crystal display device 1 according to the present invention, all the connection pins 10 can be attached to the device main body 20 at a time, and the work man-hours can be reduced and the work efficiency can be improved as compared with the conventional case. Furthermore, in the conventional configuration, it is necessary to apply a pin fixing resin to each of the end portion of the upper liquid crystal cell and the end portion of the lower liquid crystal cell (in two steps). It led to an increase in consumption. On the other hand, in the liquid crystal display device 1 according to the present invention, it is only necessary to apply the pin fixing resin 51 to one stage, so that it is possible to reduce the work man-hour and the consumption of the pin fixing resin 51.

  The attachment procedure for attaching the connection pin 10 to the apparatus main body 20 has been described above. Hereinafter, the driving of the liquid crystal display device 1 configured as described above will be described.

  First, a liquid crystal driving voltage is applied from the printed circuit board 99 to the lower transparent electrode 27 and the upper transparent electrode 35 via the connection pins 10. At this time, in the upper liquid crystal cell 21, by applying a voltage to the upper transparent electrode 25 and the lower transparent electrode 27 using a voltage applying unit (not shown) applied to the lower transparent electrode 27, The direction of the liquid crystal molecules in the upper liquid crystal layer 26 in the region sandwiched between the upper transparent electrode 25 and the lower transparent electrode 27 to which the voltage is applied is changed. By doing so, it is possible to display “1” by changing the orientation of the liquid crystal molecules in the regions of the segments 26a and 26b shown in FIG. 1A, for example.

Components of the liquid crystal display device 2 according to the second embodiment will be described with reference to FIGS. 6 is an overall view of the liquid crystal display device 2, FIG. 7 is a partially enlarged view of the liquid crystal display device 2, and FIGS. 8 and 9 are cross-sectional views of the liquid crystal display device 2. The liquid crystal display device 2 according to the second embodiment is similar to the liquid crystal display device 1 except for the lower liquid crystal cell 31 in the liquid crystal display device 1 described above. Therefore, in the following description, the same members as the liquid crystal display device 1 are used. The same reference numerals are assigned to the components, and the description thereof is omitted. The description will focus on the parts different from the liquid crystal display device 1.

  As shown in FIGS. 6A, 6B, and 7A, the liquid crystal display device 2 includes an apparatus main body 60 and a plurality of connection pins 10 that connect the apparatus main body 60 and the printed circuit board 99. Consists of The connection pin 10 basically has the configuration described in the first embodiment. However, the upper connection portions 12 and 12 and the lower connection portions 13 and 13 are arranged in accordance with the thickness of the lower glass substrate 28 described later. The vertical spacing dimension has been changed.

  As shown in FIGS. 8 and 9, the apparatus main body 60 is provided with an upper polarizing plate 22, an upper glass substrate 23 disposed on the lower surface side of the upper polarizing plate 22, and an upper glass substrate 23 facing vertically. The lower glass substrate 28, the upper liquid crystal layer 26 sealed by the sealing member 24 in the gap between the upper glass substrate 23 and the lower glass substrate 28, the upper transparent electrode 25 provided on the lower surface of the upper glass substrate 23, the lower glass substrate The lower transparent electrode 27 provided on the upper surface of the lower electrode 28, the transparent electrode heater 29 provided on the lower surface of the lower glass substrate 28, and the lower polarizing plate 32 provided on the lower surface of the transparent electrode heater 29 are mainly configured.

  The transparent electrode heater 29 is transparent and formed in a film shape, and includes a heater electrode 29a therein, and is configured to generate heat by applying an electric current to the heater electrode 29a. As shown in FIG. 7B, the heater electrode 29 a is exposed on the lower surface side of the front end portion of the transparent electrode heater 29 so as to be lined up to the left and right with a predetermined width. In a state where the apparatus main body 60 is assembled, the lower transparent electrode 27 and the heater electrode 29a are formed so as to be shifted from side to side so as not to be opposed to each other in the vertical direction. FIG. 6A illustrates a configuration in which the heater electrode 29a is exposed for two portions from the left and right ends, and the lower transparent electrode 27 is exposed on the inside, but this configuration is appropriately changed in design. Is possible.

  When the connection pin 10 is attached to the apparatus main body 60 having the above-described configuration, the lower transparent electrode 27 and the upper connection portions 12 and 12 exposed on the upper surface side of the front end portion of the lower glass substrate 28 are performed in the same manner as in the first embodiment. (See FIG. 9), the heater electrode 29a exposed on the lower surface side of the front end portion of the transparent electrode heater 29 and the lower connecting portions 13 and 13 are brought into contact (see FIG. 8), and these are electrically connected. Let Then, after the conductive paste 52 is attached to the exposed portions of the lower transparent electrode 27 and the heater electrode 29a and dried, the pin 10 is applied to the device body 60 by applying the pin fixing resin 51 (the contact portion 18). ) Can be securely fixed.

  The driving of the liquid crystal display device 2 configured as described above will be described below. A liquid crystal driving voltage is applied from the printed circuit board 99 to the lower transparent electrode 27 via the connection pin 10, and a direct current is supplied from the printed circuit board 99 to the heater electrode 29 a. At this time, a voltage application unit (not shown) applies a voltage to the upper transparent electrode 25 and the lower transparent electrode 27 by using a liquid crystal driving voltage applied to the lower transparent electrode 27, whereby the upper transparent to which this voltage is applied is applied. The direction of the liquid crystal molecules in the upper liquid crystal layer 26 in the region sandwiched between the electrode 25 and the lower transparent electrode 27 is changed. In this way, desired display can be performed.

  The liquid crystal display device 2 has a configuration in which a transparent electrode heater 29 is provided on the lower surface of the lower glass substrate 28. Therefore, by supplying a direct current to the transparent electrode heater 29, the temperature of the liquid crystal molecules can be immediately increased to a temperature at which the direction can be quickly changed. Time can be shortened. The liquid crystal display device 2 can exhibit the above-described effects remarkably by being mounted on an automobile, for example.

  Further, the liquid crystal display device 2 exposes the lower transparent electrode 27 on the upper surface side of the front end portion of the lower glass substrate 28 to be electrically connected to the upper connection portions 12, 12, and the front end portion of the lower glass substrate 28 (transparent electrode heater 29). The heater electrode 29a is exposed on the lower surface side and is electrically connected to the lower connection portions 13 and 13. Therefore, for example, compared with a configuration in which the lower transparent electrode 27 and the heater electrode 29a are exposed on the upper surface side of the lower glass substrate 28, the electrode arrangement configuration can be simplified and simplified, and problems such as connection mistakes are reduced. It becomes possible.

1 is a liquid crystal display device according to a first embodiment to which the present invention is applied, in which (a) shows a plan view and (b) shows a side view. (A) is an enlarged view of II (a) part in FIG. 1 (a), (b) shows the perspective view of a glass substrate, respectively. It is a perspective view of the connection pin used for the said liquid crystal display device. It is sectional drawing which showed the IV-IV part in Fig.2 (a). It is sectional drawing which showed the VV part in Fig.2 (a). It is a liquid crystal display device which concerns on Example 2 to which this invention is applied, Comprising: (a) shows a top view, (b) shows a side view, respectively. (A) is an enlarged view of the VII (a) part in FIG. 6 (a), (b) shows the perspective view of a glass substrate and a transparent electrode heater, respectively. It is sectional drawing which showed the VIII-VIII part in Fig.7 (a). It is sectional drawing which showed the IX-IX part in Fig.7 (a). It is sectional drawing of the conventional liquid crystal display device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 10 Connection pin 12 Upper connection part (Upper clamping plate)
12a Gap for paste (paste opening)
13 Lower connection part (lower clamping plate)
13a Gap for paste (opening for paste)
18 Contacting part (clamping part)
21 Upper liquid crystal cell 23 Upper glass substrate (upper upper substrate)
25 Upper transparent electrode (upper electrode)
26 Upper liquid crystal layer (upper liquid crystal layer)
27 Lower transparent electrode (upper electrode)
28 Lower glass substrate (upper lower substrate)
29 Transparent electrode heater (display auxiliary electrode)
31 Lower liquid crystal cell 33 Upper glass substrate (lower upper substrate)
35 Upper transparent electrode (lower electrode)
36 Lower liquid crystal layer (lower liquid crystal layer)
37 Lower transparent electrode (lower electrode)
38 Lower glass substrate (lower lower substrate)
51 pin fixing resin (fixing resin)
52 Conductive paste

Claims (5)

A pair of upper substrates disposed in parallel to each other; a pair of upper electrodes formed on surfaces of the pair of upper substrates facing each other; and an upper liquid crystal cell comprising an upper liquid crystal layer sealed between the upper electrodes;
A pair of lower substrates arranged in parallel to each other, a pair of lower electrodes formed on opposite surfaces of the pair of lower substrates, and a lower liquid crystal layer sealed between the lower electrodes A lower liquid crystal cell positioned below the upper liquid crystal cell;
A liquid crystal display device having a connection pin electrically connected to the upper electrode or the lower electrode,
The pair of upper substrates includes an upper upper substrate positioned on the upper side, and an upper connection end positioned on the upper surface of the upper upper substrate and having the upper electrode formed on the upper surface is lateral to the upper upper substrate. It is composed of an upper lower substrate formed to protrude to
The pair of lower substrates includes a lower lower substrate positioned on the lower side, and a lower connection end portion formed on the lower surface and positioned on the lower surface of the lower lower substrate. Consists of a lower upper substrate formed to protrude laterally with respect to the substrate,
The connection pin is formed by forming a U-shaped sandwiching portion in a side view,
The connection pin is
The upper electrode formed on the upper surface of the upper connection end and the upper electrode and the lower electrode on the lower surface of the lower upper substrate were positioned so as to overlap each other so that the clamping portion was in contact with the upper electrode. The upper electrode and the sandwiching portion can be electrically connected by sandwiching the upper connection end and the lower connection end integrally with the sandwiching portion in the vertical direction,
The upper connection end and the lower electrode formed on the lower surface of the lower connection end and the upper connection end and the upper electrode on the upper surface of the upper lower substrate so that the clamping portion is brought into contact with the lower electrode. A liquid crystal display device characterized in that the lower electrode and the sandwiching portion can be electrically connected by sandwiching the lower connection end portion in the vertical direction by the sandwiching portion. A pair of substrates arranged in parallel to each other, a pair of display electrodes formed on opposite surfaces of the pair of substrates, and a liquid crystal cell comprising a liquid crystal layer sealed between the display electrodes;
A display auxiliary electrode provided on the lower surface of the liquid crystal cell;
A liquid crystal display device having a connection pin electrically connected to the display electrode or the display auxiliary electrode,
The pair of substrates includes an upper substrate located on the upper side and a connection end located on the lower side of the upper substrate and having the display electrode formed on the upper surface and the display auxiliary electrode formed on the lower surface. Consists of a lower substrate formed to protrude sideways with respect to the substrate,
The connection pin is formed by forming a U-shaped sandwiching portion in a side view,
The connection pin is
The clamping end is brought into contact with the display electrode formed on the upper surface of the connection end and the portion of the lower surface of the lower substrate from which the display auxiliary electrode is removed, so that the clamping end is brought into contact with the clamping portion. The display electrode and the sandwiching portion can be electrically connected by sandwiching in the vertical direction by
The holding end is brought into contact with the auxiliary display electrode formed on the lower surface of the connecting end and the portion of the upper surface of the lower substrate from which the display electrode is removed, so that the holding end is brought into contact with the holding portion. The liquid crystal display device is characterized in that the display auxiliary electrode and the sandwiching portion can be electrically connected by being sandwiched vertically. The clamping portion in the connection pin is composed of a plate-shaped upper clamping plate and a plate-shaped lower clamping plate that is vertically opposed to the upper clamping plate,
The upper sandwiching plate and the lower sandwiching plate are formed with a paste opening penetrating vertically.
A conductive paste having conductivity in the opening for paste is formed in a connection portion where the sandwiching portion and the upper electrode, the lower electrode, the display electrode, or the display auxiliary electrode are brought into contact with and electrically connected to each other. The liquid crystal display device according to claim 1, wherein a fixing resin is applied so as to cover the applied and applied conductive paste, the upper holding plate, and the lower holding plate.   The liquid crystal display device according to claim 3, wherein the conductive paste is discharged and applied by a paste discharge device capable of discharging the droplet-shaped conductive paste.   The liquid crystal display device according to claim 3, wherein the conductive paste has a property of being cured by being irradiated with ultraviolet rays.

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