JP2011257654A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid crystal display device in which a metal component 2 for discharging static electricity can be made thin and small in size and the metal component 2 is easily assembled.SOLUTION: The liquid crystal display device has such a structure that a transparent conductive film 15 in a liquid crystal panel body 1 that is attached behind an opening 62a of a dial plate 62 is grounded by a metal component 2. In the device, a liquid crystal layer 5 is sealed between a front glass 3 and a back glass 4; and a front side polarizing plate 6 and a back face polarizing plate 7 are disposed on the front face of the front glass 3 and on the back face of the back glass 4, respectively. The device has an exposed portion 15a extended from the transparent conductive film 15 formed between the front glass 3 and the front side polarizing plate 6, the exposed portion placed in a shifted portion 14 of end faces formed by shifting positions of the end faces of the front glass 3 and the front side polarizing plate 6. The transparent conductive film 15 is connected by pinching portions 23a, 23b, 24a, 24b in contact with the exposed portion 15a to the ground in a circuit board 32 via a flexible printed board 10.

Description

  The present invention relates to a liquid crystal display device using a liquid crystal panel body. In particular, the present invention relates to a liquid crystal display device in which an electrostatic countermeasure component such as a TFT liquid crystal panel can be easily fastened to a display device main body.

  In recent years, many display devices using a liquid crystal dot matrix such as a TFT liquid crystal have been adopted for vehicle meters. The TFT liquid crystal is a kind of liquid crystal display, and is an active matrix type that uses a transistor processed into a thin film, and is the mainstream method of current liquid crystal panels.

  In the TFT liquid crystal, a transistor controls display on each dot constituting the screen. For this reason, a uniform and non-uniform display is possible. In addition, the response speed is fast, the contrast is high, and the brightness of the screen can be adjusted by changing the voltage of the transistor. The image quality does not deteriorate even when used for a large screen display.

  In such a liquid crystal panel body, when static electricity is applied from the outside with a finger of a charged driver or the like, the orientation of the internal liquid crystal layer is disturbed, and the originally black OFF segment portion transmits the backlight light. It may reverse to the ON segment state and not return for a long time.

  In order to prevent this phenomenon, if the static electricity received on the surface of the liquid crystal panel body flows to the ground via the ground conductor in the circuit board before reaching the internal liquid crystal layer, the liquid crystal layer will not be damaged. In general, an ITO film (transparent conductive film) is set on the entire glass surface of the liquid crystal panel body, and this ITO film is brought into contact with a metal part to conduct to the ground conductor in the circuit board via the metal part. The technique to take is taken.

  Specifically, a display device using a liquid crystal display panel body described in Patent Document 1 is known. The apparatus of Patent Document 1 includes a rectangular liquid crystal display panel main body, a recessed tray-shaped holder that stores and holds the liquid crystal display panel main body, and the liquid crystal display panel main body side that is disposed behind the holder. A circuit board electrically connected via a flexible wiring board and a frame-like conductive frame frame fixed to the surface side of the liquid crystal panel main body are provided.

  And it has the guide part provided in groove shape in one of the four corners of the tray-shaped holder. A tongue-shaped energizing arm piece extends integrally from the conductive frame-like frame at a position corresponding to the guiding portion. Then, the energizing arm piece is housed in the groove-shaped guiding portion.

  The tip of the energizing arm piece is connected to the ground conductor of the circuit board. The conductive frame-like frame has a shorter length than the energizing arm piece, and a plurality of fixing arm pieces having engagement holes project in the same direction as the energizing arm piece. The piece is coupled to a claw-like engagement portion provided on the side wall of the holder.

JP 2009-237220 A

  However, in the technique of Patent Document 1, since the metal parts forming the conductive frame are covered so as to cover the outer periphery of the surface of the liquid crystal panel body, the metal parts are interposed from the opening of the dial plate to the liquid crystal panel body. The surface of the liquid crystal panel body that can be seen from the opening of the dial is visible in the back by the thickness of the metal part. Therefore, the white part of the case is visually recognized from an oblique direction and the appearance is poor, and the appearance design is also impaired.

  Further, after assembling the metal parts from the front side, it is necessary to bend the energizing arm pieces and the like that are part of the metal parts from the opposite side (back side). In addition, since the screws are fastened to the circuit board after performing this bending process, the method for assembling the metal parts is complicated and requires a large number of assembling steps.

  The present invention has been made paying attention to such problems existing in the prior art, and the object thereof is to achieve a reduction in thickness and size of metal parts, and easy assembly of metal parts. Another liquid crystal display device is provided.

  Descriptions of patent documents listed as prior art can be introduced or incorporated by reference as explanations of technical elements described in this specification.

  In order to achieve the above object, the present invention employs the following technical means. That is, according to the first aspect of the present invention, in the liquid crystal display device in which the opening is formed in the surface plate that extends in a planar shape, and the display content displayed on the liquid crystal panel body is visually recognized through the opening, the facing front glass A liquid crystal layer is sealed between the front glass and the back glass, a front side polarizing plate and a back side polarizing plate are respectively provided on the front glass surface and the back glass, and a transparent conductive film is provided between the front glass and the front side polarizing plate. A liquid crystal panel body composed of the formed layer structure, a case to which the liquid crystal panel body is attached, and formed by a positional shift between the front glass edge in the plane direction of the front glass and the front side polarizing plate edge in the plane direction of the front side polarizing plate. At least the transparent conductive film and the front glass are placed on the surface of the front glass by an exposed portion formed on the surface of the front glass and drawn from the transparent conductive film, and a squeezed shape portion in contact with the exposed portion. Metal parts that are crowded scissors from the back direction, is held in the case, and further comprising a fastener for connecting the circuit board having a grounded conductive wiring, and the metal parts to the conductor wiring of the circuit board.

  According to the present invention, the transparent glass is formed on the surface of the front glass, located on the step formed by the misalignment between the front glass end in the plane direction of the front glass and the front side polarizing plate end in the plane direction of the front side polarizing plate. Metal parts that hold at least the transparent conductive film and the front glass from the front and back direction of the front glass by the exposed part that is drawn out from the conductive film, and the squeezed shape part that contacts the exposed part, are held in the case and grounded Circuit board having a conductive wiring, and a fastener for connecting a metal part to the conductive wiring of the circuit board, so that the liquid crystal panel body including the front-side polarizing plate that is visible from the opening of the surface plate does not look deep, The appearance design is not impaired. Further, it is not necessary to cover the entire circumference of the surface-side polarizing plate with a metal part, and it is sufficient to use a metal part that squeezes at least the transparent conductive film and the front glass by a squeezed shape part that contacts the exposed part of the transparent conductive film Therefore, it is possible to provide a liquid crystal display device that achieves thinning and miniaturization of metal parts and that can be easily assembled.

  In the invention according to claim 2, the metal part has a contact portion that contacts the end portion of the front glass, and the liquid crystal panel main body includes a pair of bent shape portions existing on both sides in the longitudinal direction of the corresponding contact portion. The width between the bent parts of the metal parts is made smaller than the width in the longitudinal direction of the liquid crystal panel body, and the metal parts are sandwiched at least according to the thickness of the front glass. A pair of sandwiching shape portions formed opposite to each other in the front and back direction of the front glass having a narrowing width are provided, and the protruding length of the sandwiching shape portion in the planar direction of the front glass is in the planar direction of the front glass. It is characterized by being set shorter than the length of the positional deviation.

  According to the present invention, the pair of bent portions are fitted into the corners at both ends of the liquid crystal panel body, and the width between the bent portions of the metal parts is smaller than the width in the longitudinal direction of the liquid crystal panel body. The metal part is provided with a pair of sandwiching portions formed opposite to each other in the front and back direction of the front glass having at least a sandwiching width corresponding to the thickness of the front glass. Since the projection length in the plane direction of the glass is set to be shorter than the length of the positional deviation in the plane direction of the front glass, the liquid crystal panel body can be squeezed with metal parts. It is possible to achieve a sufficient coupling force due to the pinching. Further, the transparent conductive film can be grounded by reliably sandwiching the exposed portion by the sandwiching shape portion.

  In the invention according to claim 3, the metal part has an extending part extending from the abutting part between the bent parts to the front and back direction of the front glass and reaching the fastener, and extends from the abutting part. The metal part is characterized by having a T-shape.

  According to the present invention, since the metal part can be constituted by a small T-shaped part, the metal part can be miniaturized.

  In the invention according to claim 4, the case has a case hole portion into which the extending portion of the metal part is inserted, and the guide portion sandwiched between the guide protrusions planted on the wall surface in the case hole portion. It is characterized by having it on both sides of the extension part.

  According to the present invention, since the guide portions sandwiched between the guide projections planted on the wall surface in the case hole portion are provided on both sides of the extension portions, the guide portions of the extension portions are provided on the guide projections. The metal parts can be firmly attached to the case, so that the thickness of the metal parts can be reduced and the rigidity can be reduced, and the metal parts can be reduced in size and weight, In addition, since the metal parts are guided and assembled by the guide protrusions, a liquid crystal display device that can be easily assembled can be obtained.

  In the invention according to claim 5, the metal part has a bent part adjacent to the fastener, and the fastener for connecting the metal part to the conductor wiring of the circuit board has the bent part from the surface plate side to the surface of the circuit board. It is characterized by comprising a fastener that is pressed against the metal part to conduct the metal part to the conductor wiring.

  According to this invention, the metal part is connected to the conductor wiring of the circuit board by the fastener that presses the bent portion of the metal part from the surface board side to the surface of the circuit board. Can be connected to.

  The invention according to claim 6 is characterized in that the thickness of the sandwiched portion of the metal part is equal to or less than the thickness of the front polarizing plate.

  According to this invention, since the thickness of the sandwiched portion of the metal part is equal to or less than the thickness of the front-side polarizing plate, the clearance between the surface plate and the front-side polarizing plate is small regardless of the thickness of the metal part. It can be.

It is a perspective view which shows the state which attaches the metal component for electrostatic discharge to the liquid crystal panel main body of the liquid crystal display device in one Embodiment of this invention. In the said one Embodiment, it is a perspective view explaining the state which assembles | assembles the integrated object of a metal component and a liquid crystal panel main body in the case of the instrument for vehicles. It is sectional drawing of the liquid crystal display device part in the meter for vehicles along the F3-F3 line | wire of FIG. It is sectional drawing of the said liquid crystal display device part along the F4-F4 line | wire of FIG.

(One embodiment)
Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a perspective view showing a state in which a metal part 2 for discharging static electricity is assembled to a liquid crystal panel body 1 of a liquid crystal display device of the present invention.

  The liquid crystal display device using the liquid crystal panel main body 1 can be used as a multi-display, including a digital odometer (odometer), a section distance accumulator (trip meter), and an average fuel consumption display. Used for eco-drive display, failure display, alarm display, etc.

  The metal component 2 that conducts static electricity to a circuit board 32 (FIG. 3), which will be described later, has a T-shape as a whole having a contact portion 2a and an extending portion 2b orthogonal to the corresponding contact portion 2a as shown in FIG. . The liquid crystal panel main body 1 has a configuration of two sheets of a front glass 3 and a back glass 4, and a liquid crystal layer 5 is enclosed between the two glasses 3 and 4 in a thickness of a micron unit. The thickness of the surface glass 3 is 0.5 mm to 0.7 mm.

  A front-side polarizing plate 6 having a length in the longitudinal direction shorter than that of the surface glass 3 is attached to the surface of the surface glass 3. The front polarizing plate 6 has a thickness W32 (FIG. 3) of 0.2 mm to 0.3 mm and is an insulator, but high-voltage static electricity penetrates into the inside.

  Similarly, a back-side polarizing plate (7) that cannot be seen from FIG. These front glass 3, back glass 4, front side polarizing plate 6, back side polarizing plate 7, and liquid crystal layer 5 are collectively referred to as a liquid crystal panel body 1.

  The back glass 4 is longer in the longitudinal direction (vertical direction in FIG. 1) than the front glass 3, and a step 8 is provided between the front glass 3 and the back glass 4. Using this stepped portion 8, a dot matrix driving microcomputer 9 is mounted on the stepped portion 8.

  Similarly, the flexible printed circuit board 10 for connection to the circuit board 32 (FIG. 3) not shown in FIG. 1 is mounted on the stepped portion 8 having the width W11 by being fixed with a conductive paste or a conductive double-sided tape. . The tip 10a of the flexible printed circuit board 10 is reinforced by a reinforcing member.

  After the microcomputer 9 and the flexible printed board 10 are mounted, the connecting portion of the microcomputer 9 and the flexible printed board 10 is coated with a silicon resin 11 in order to protect it from humidity and external force during handling. The height of the silicon resin 11 is controlled and manufactured so as not to exceed the surface of the surface glass 3 from the surface of the stepped portion 8. In addition, the thickness of the surface glass 3 is about 0.5 mm to 0.7 mm.

  The top glass 3 and the back glass 4 are overlapped with the end portions 12 aligned on the upper side of FIG. 1 facing the stepped portion 8 which is a shift portion between the front glass 3 and the back glass 4. The end portion 12 is also an end portion of the liquid crystal panel main body 1, and a shift portion 14 is formed between the end portion 12 and the end portion 13 of the front-side polarizing plate 6 due to the position shift of the end face of the width W12. . The width W12 of the end face shift portion 14 is about 3 to 5 mm, and the end face shift portion 14 exposes a portion 15a of the transparent conductive film (ITO film) 15 formed on the entire surface of the surface glass 3. ing.

Next, the structure of the metal part 2 will be described. The metal part 2 is made of a metal material having a thin plate thickness such as spring phosphor bronze or white and having excellent spring properties. In this embodiment, the thickness of the metal part 2 is 0.2 to 0.3 mm corresponding to the thickness of the front-side polarizing plate 6. That is, the plate thickness of the metal component 2 is set to be equal to or less than the thickness of the front polarizing plate 6.

  The bent portions 21 and 22 on both sides of the metal part 2 are fitted into the end portion 12 of the liquid crystal panel body 1 from the direction of displacement of the end face (arrow A1 and A2 direction). The width W13 between the bent portions 21 and 22 of the metal part 2 is slightly smaller (about 0.2 to 0.5 mm) than the width W14 of the liquid crystal panel body 1, so that the metal part 2 can be The backlash in the left-right direction in FIG.

  Further, the bent portions 21 and 22 of the metal part 2 are curled by curving in a direction away from each other toward the distal end side. With this curl shape, the bent portions 21 and 22 of the metal part 2 are easily fitted into the end portion 12 of the liquid crystal panel body 1 and are not easily removed. That is, by this curl shape, when the metal part 2 is fitted into the liquid crystal panel main body 1, the width in the vicinity of the entrance of the bent shape portions 21 and 22 is increased and becomes narrower toward the back.

  Further, the metal part 2 has a pair of left and right upper and lower sandwiching portions 23a, 23b, 24a having a sandwiching width corresponding to the thickness W15 of the liquid crystal panel body 1 (the total thickness of the front glass 6, the rear glass 7, and the liquid crystal layer 5). , 24b are provided.

  The projecting lengths W16 and W17 of the sandwiched shape portions 23a, 23b, 24a, and 24b are the same length, and are slightly larger than the width W12 of the shift portion 14 of the end face made of the portion 15a of the transparent conductive film 15 ( (About 0.5 mm) is set short to prevent the sandwiched portions 23 a, 23 b, 24 a, 24 b from getting on the front-side polarizing plate 6.

  The width in the vertical direction of FIG. 1 between the sandwiching shape portions 23a and 23b and the sandwiching shape portions 24a and 24b is set slightly narrower (about 0.1 to 0.2 mm) than the thickness W15 of the liquid crystal panel body 1. Further, as described above, a part 15 a of the transparent conductive film 15 formed on the entire surface of the surface glass 3 is exposed at the end face shift portion 14.

  Thus, the metal part 2 and the transparent conductive film 15 of the liquid crystal panel main body 1 are configured to be surely electrically connected to each other when the shift portion 14 of the end face is sandwiched between the sandwiched portions 23a, 23b, 24a, and 24b. ing.

  The sandwiched portions 23b and 24b on the back side corresponding to the lower side of FIG. 1 have a curl shape that expands toward the tip, and the sandwiched portions 23a, 23b, 24a, and 24b are formed into transparent conductive films of the liquid crystal panel body 1. 15, the width of the sandwiched portions 23 a, 23 b, 24 a, 24 b near the entrance is set to be slightly larger than the thickness W 15 of the liquid crystal panel body 1 to facilitate the sandwiching.

  The sandwiching portions 23a and 24a on the front side of the metal part 2 have a flat shape and are not curled. Thereby, the plate | board thickness (0.2-0.3mm) of the metal component 2 and the plate | board thickness (0.2-0.3mm) of the front side polarizing plate 6 are made substantially equivalent, and the sandwiching shape part of the front side of the metal component 2 is carried out. Consideration is given so that 23a and 24a do not protrude from the surface of the front polarizing plate 6 significantly.

  The metal component 2 is held and fixed to the liquid crystal panel body 1 with a certain holding force (clamping force). In addition, the metal part 2 and the transparent conductive film 15 of the liquid crystal panel body 1 are electrically connected to each other.

  Bending portions 25 and 26 formed by continuously and integrally bending the same spring material as that of the metal part 2 are formed. Bending portions 25 and 26 are formed by bending a tongue piece protruding downward from the metal part 2 in FIG. 1 to the back side of the metal part 2 in FIG. 1.

  After the metal part 2 and the liquid crystal panel body 1 are integrated as described above, the integrated metal part 2 and the liquid crystal panel body 1 are assembled to the case 30 of the meter body as shown in FIG. . FIG. 2 is a perspective view for explaining a state in which the integrated metal part 2 and the liquid crystal panel body 1 are assembled to the case 30 in this embodiment. 3 is a cross-sectional view taken along line F3-F3 in FIG. 2, and FIG. 4 is a cross-sectional view taken along line F4-F4 in FIG.

  In FIG. 2, the case 30 is a molded product made of a white resin such as polypropylene resin. A rectangular diffusion plate 31 is press-fitted and fixed in the recess 30 k of the case 3. At this time, the bottom surface of the diffusion plate 31 is received by the first recess 30 a of the case 30, and the protrusions 31 a, 31 b, 31 c, 31 d that are integrally injection-molded on the side surface of the polycarbonate diffusion plate 31 are placed in the recess of the case 30. 1 is press-fitted and held in the side wall 30b.

  The diffusion plate 31 is made of a resin molded product obtained by blending diffusion beads or the like with polycarbonate or the like. Therefore, the diffusing plate 31 diffuses the light of the light emitting diodes (also referred to as LEDs) 33, 34, 35, 36, 37, and 38 mounted on a circuit board 32 (FIG. 3), which will be described later, with the internal diffusion components. The light emitted from the light emitting diodes 33, 34, 35, 36, 37, and 38 having no unevenness that has passed through the diffusion plate 31 is uniformly transmitted through the liquid crystal panel body 1.

  After the diffusion plate 31 is press-fitted and fixed in the recess 30k of the case 30 of the meter body, the bottom surface of the liquid crystal panel body 1 integrated with the metal component 2 is received by the second recess 30c of the case 30 of FIG. When the liquid crystal panel main body 1 is assembled to the case 30, the flexible printed circuit board 10 protruding from the liquid crystal panel main body 1 is inserted into the case hole 39.

  2 is connected to a connector 40 mounted on the circuit board 32, as shown in FIG. 3, and the circuit board 32 and the liquid crystal panel body 1 are connected via the flexible printed board 10. Electrically conducting.

  As shown in FIGS. 1 and 3, the metal part 2 attached to the liquid crystal panel body 1 includes a bent portion (screw tightening portion) 41 and a pair of left and right guide portions 42 and 43 (FIG. 1) made of the same metal material. Molded continuously. When the liquid crystal panel body 1 is assembled to the case 30, the bent portion 41 of the metal component 2 is inserted into the case hole 45 as shown in FIG. 3.

  As shown in FIG. 3, the liquid crystal panel body 1 including the front glass 3, the liquid crystal layer 5, the back glass 4, the front side polarizing plate 6, and the back side polarizing plate 7 constituting the liquid crystal panel main body 1 is integrated with the metal component 2. 4 is assembled as shown in FIG. 3 through the assembly process of FIG. In this case, the guide portions 42 and 43 (FIG. 1) of the metal part 2 are held in the grooves between the guide protrusions 51, 52, 53, and 54 in the case hole 45 of FIG.

  That is, one guide portion 42 (FIG. 1) of the metal part 2 is inserted into a groove between the guide protrusions 51 and 52 that are integrally molded with the case 30 and protrude in FIG. Similarly, the guide protrusion 43 is also inserted into the groove between the guide protrusions 53 and 54 planted on the inner wall surface of the case hole 45 of the case 30 as shown in FIG. 3 is a cross-sectional view taken along the line F3-F3 in FIG. 2, the guide part 43 (FIG. 2) of the metal part 2 protrudes beyond the plane of the drawing, and the guide part 42 is not shown.

  As shown in FIG. 3, the bent portion 41 of the metal part 2 is assembled in contact with the surface of the circuit board 32, and the ground potential connected to the body of the vehicle body is illustrated on the circuit board 32 on the contact surface. A copper foil pattern is provided.

  By tightening the screw 60 constituting the fastener attached to the bent portion 41 to the screw boss portion 61a of the lower cover 61, the metal component 2 and the copper foil pattern of the ground potential (not shown) provided on the circuit board 32 are surely obtained. Electrical connection can be made. Thereby, the transparent conductive film 15 on the surface glass 3 surface and the circuit board 32 are electrically connected.

  In addition, the printed circuit board which comprises the circuit board 32 is formed with the copper foil pattern which comprises a circuit on both surfaces. Reference numeral 62 on the left side of FIG. 3 denotes a dial plate constituting a surface plate according to the present invention. 63 is a facing plate that serves as a decorative plate that hides the outer periphery of the dial 62, and is made of a black resin molded product such as polypropylene resin.

  As described above, the sandwiched portions 23a and 24a (FIG. 1) on the front side of the metal part 2 have a flat shape and are not curled. This is the thickness of the metal part 2 (the same as the thickness 0.2 to 0.3 mm of the sandwiched portions 23a and 24a) and the thickness W32 (the thickness of 0.2 to 0.3 mm) of the front polarizing plate 6. This is because the front side sandwiched portions 23 a and 24 a of the metal part 2 are considered to be substantially the same so that they do not protrude significantly from the front side polarizing plate 6.

  Therefore, the clearance W31 between the front surface of the front polarizing plate 6 assembled at a predetermined position and the back surface of the dial plate 62 in FIG. It is possible to make the minimum gap only the difference. Further, the end face of the opening 62a of the dial 62 covers the front polarizing plate 6 by a dimension W33.

  Therefore, the position of the front polarizing plate 6 does not appear to be extremely deep from the opening 62a of the dial 62. As is well known, a pointer shaft connecting the pointer and the movement for driving the pointer penetrates a portion (not shown) of the dial 62 printed on a translucent material such as a polycarbonate sheet. ing.

  In FIG. 4, the configuration for assembling the liquid crystal panel body 1 to the case 30 will be further described. The state before assembling the liquid crystal panel main body 1 is such that the lower end portion 65 of the liquid crystal panel main body 1 is hooked on the hook portions 66a and 66b (FIG. 2) of the case 30 as indicated by a 1X virtual line, and the arrow A4 in FIG. The liquid crystal panel body 1 is raised to the case 30 side in the direction of and the liquid crystal panel body 1 is assembled at a predetermined position of the case 30.

  At this time, the bent portions 25 and 26 (FIG. 1) formed by continuously and integrally bending the same material as the metal part 2 are pressed against the opposing case wall 70, and the bent portions 25 and 26 are compressed. The amount by which the bent portions 25 and 26 of the metal part 2 are compressed is about 0.2 to 0.3 mm.

  Hereinafter, the operation of the first embodiment will be described. The front glass 3 and the back glass 4 are overlapped with the end 12 (FIG. 1) aligned. Between the end portion 12 and the end portion 13 of the front-side polarizing plate 6, a shift portion (end surface deviation) 14 of the end surface having a width W12 is formed. A part 15 a of the transparent conductive film 15 formed on the entire surface of the surface glass 3 is exposed at the end face shift portion 14. The transparent conductive film 15 is electrically connected to the sandwiched portions 23a, 23b, 24a, 24b of the metal part 2 and grounded.

  Therefore, even if static electricity is applied from the outside with a charged driver's finger or the like, the static electricity escapes to the ground, so that the orientation of the liquid crystal layer 5 is not disturbed, and the originally black OFF segment portion transmits the backlight light. It does not reverse to the ON segment state.

  Next, as shown in FIG. 3, the bent portion 41 of the metal component 2 is assembled in contact with the surface of the circuit board 32, and on the circuit board 32 on the contact surface, the ground connected to the body of the vehicle body is provided. An electric potential copper foil pattern is provided.

  Therefore, even when a charged finger or the like touches the front-side polarizing plate 6, a high voltage is guided from the transparent conductive film 15 to the copper foil pattern having the ground potential through the metal part 2. Further, the metal component 2 can be configured as a small component that covers the part 15a (FIG. 1) of the transparent conductive film 15 formed on the entire surface of the surface glass 3.

  When the bent portions 21 and 22 (FIG. 1) on both sides of the metal part 2 are fitted into the upper end of the liquid crystal panel body 1 and the metal part 2 is fitted to the liquid crystal panel body 1, Is lost.

  The sandwiching portions 23a and 24a on the front side of the metal part 2 have a flat shape and are not curled. This is almost the same as the plate thickness of the metal part 2 (the same as the thickness 0.2 to 0.3 mm of the sandwiched portions 23a and 24a) and the plate thickness (the thickness of 0.2 to 0.3 mm) of the front side polarizing plate 6. The front side sandwiched portions 23 a and 24 a of the metal part 2 are prevented from protruding from the surface of the front side polarizing plate 6.

  In FIG. 4, the configuration for assembling the liquid crystal panel 1 to the case 3 will be further described. In FIG. 4, the state before the liquid crystal panel main body 1 is assembled is that the lower end portion 65 of the liquid crystal panel main body 1 is hooked on the hooking portions 66 a and 66 b (two places) of the case 30 as indicated by a virtual line of 1X. The liquid crystal panel main body 1 is raised to the case 30 side in the direction of A4, and the liquid crystal panel main body 1 is assembled at a predetermined position of the case 3.

  At this time, the bent portions 25 and 26 formed by continuously and integrally bending the metal part 2 with the same material are pressed against the opposing case wall 70 and the bent portions 25 and 26 are compressed. By fixing the hook portions 66a and 66b and the bent portions 25 and 26, the liquid crystal panel main body 1 can be fixed to the case 30 without any play.

  As shown in FIG. 3, the clearance W31 between the front surface of the front polarizing plate 6 assembled at a predetermined position and the back surface of the dial plate 62 is about 0.2 to 0.5 mm regardless of the presence or absence of the metal part 2. It is possible to make the minimum gap of only the tolerance. Therefore, the position of the front polarizing plate 6 does not appear to be recessed from the opening 62a of the dial 62, the white color of the case 30 is not visually recognized by the driver, and the aesthetics are not impaired.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. For example, in the above-described embodiment, the upper end surfaces of the front glass 3 and the rear glass 4 are combined and sandwiched by the sandwiching shape portions 23a, 23b, 24a, and 24b, but only the front glass 3 may be sandwiched. That is, the upper end surfaces of the front glass 3 and the rear glass 4 are shifted, and a step portion similar to the step portion 8 on the lower end surface is provided on the upper end surface of the protruding front glass 3, and only the upper end surface of the front glass 3 is sandwiched. It may be sandwiched between 2B1, 2B2, 22C1, and 2C2.

  Next, the screw 8 may be anything as long as it is a fastener, and a hook may be used in addition to the tapping screw.

DESCRIPTION OF SYMBOLS 1 Liquid crystal panel main body 2 Metal parts 2a Contact part 2b Extension part 3 Surface glass 4 Back glass 5 Liquid crystal layer 6 Front side polarizing plate 7 Back side polarizing plate 8 Step part 10 Flexible printed circuit board 12 It becomes an edge part of surface glass and back glass End part of liquid crystal panel body 13 End part of front side polarizing plate 14 Deviation part of end face 15 Transparent conductive film (ITO film)
15a Part of transparent conductive film 21, 22 Bent part 23a, 23b, 24a, 24b Nipped part 25, 26 Bent part 30 Case 31 Diffusion plate 32 Circuit board 39 Case hole 41 Bending part (screw tightening part)
42, 43 Guide portions 51, 52, 53, 54 Guide protrusions 60 Screws forming fasteners 62 Dial plates forming surface plates 62a Dial plate openings 70 Case walls W31 Clearance between the front polarizing plate and the dial W32 Thickness of front polarizing plate

Claims (6)

In a liquid crystal display device in which an opening is formed in a flat surface plate and the display content displayed on the liquid crystal panel body is visually recognized through this opening,
A liquid crystal layer is sealed between the facing front glass and the back glass, and a front side polarizing plate and a back side polarizing plate are provided on the front glass surface and the back glass, respectively, and the front glass and the front side polarization are provided. The liquid crystal panel main body comprising a layer structure in which a transparent conductive film is formed between the plate and the plate;
A case to which the liquid crystal panel body is attached;
The transparent conductive film formed on the surface of the front glass, located on a step formed by a positional deviation between a front glass end in the plane direction of the front glass and a front side polarizing plate end in the plane direction of the front side polarizing plate. Exposed part, drawn from
A metal part in which at least the transparent conductive film and the front glass are squeezed from the front and back directions of the front glass by a squeezed shape part that contacts the exposed part,
A liquid crystal display device comprising: a circuit board having a conductor wiring held in the case and grounded; and a fastener for connecting the metal component to the conductor wiring of the circuit board. The metal part has an abutting portion that abuts against the end portion of the front glass, and a pair of bent shape portions existing on both sides in the longitudinal direction of the corresponding contact portion are formed at corners at both ends of the liquid crystal panel body. The width between the bent parts of the metal part is made smaller than the width of the liquid crystal panel body in the longitudinal direction,
The metal part is provided with a pair of sandwiched portions formed opposite to each other in the front and back direction of the front glass having a sandwich width corresponding to at least the thickness of the front glass,
2. The liquid crystal display according to claim 1, wherein a protruding length of the sandwiched shape portion in a planar direction of the front glass is set to be shorter than a length of the positional deviation in the planar direction of the front glass. apparatus.   The metal part has an extending part extending from the abutting part between the bent shape parts to the front and back direction of the front glass and reaching the fastener, and the abutting part and the extending part The liquid crystal display device according to claim 2, wherein the metal part has a T-shape.   The case has a case hole portion into which the extending portion of the metal part is inserted, and guide portions sandwiched between guide protrusions planted on a wall surface in the case hole portion are arranged on both sides of the extending portion. The liquid crystal display device according to claim 3, wherein the liquid crystal display device is provided on a side.   The metal part has a bent part adjacent to the fastener, and the fastener for connecting the metal part to the conductor wiring of the circuit board has the bent part from the surface plate side to the surface of the circuit board. 5. The liquid crystal display device according to claim 1, further comprising a fastener that is pressed against the metal part to cause the metal part to conduct to the conductor wiring. 6.   6. The liquid crystal display device according to claim 1, wherein a thickness of the sandwiched portion of the metal part is equal to or less than a thickness of the front polarizing plate.

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