Display device

Abstract

To provide a display device capable of suppressing malfunction of an indicator because of electromagnetic noise.SOLUTION: A display device includes an indicator, a middle case 50, a circuit board 60, and a ground plate 80 for allowing static electricity charged in a liquid crystal display panel to flow to a ground pattern section 61 of the circuit board 60, an indicator case has a boss section 43 with which a shaft section 92 is threadedly engaged, the middle case 50 has a housing recess 52 for housing the boss section 43 and the ground plate 80, the housing recess 52 has a bottom section 52b positioned between the boss section 43 and the circuit board 60, and an exposed hole section 52c, and the ground plate 80 has a clamped section 81 clamped between the boss section 43 and the bottom section 52b, and a ground contact section 82 that is exposed to the circuit board 60 via the exposed hole section 52c and abuts on the ground pattern section 61. A screw 90 co-fastens the indicator, the circuit board 60, the middle case 50, and the ground plate 80.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present disclosure relates to a display device. [Background technology]

[0002] For example, the display device described in Patent Document 1 includes a display that displays image information, a circuit board disposed behind the display, and a front case and a rear case that house the display and the circuit board. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2011-111056 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration described in Patent Document 1, there is a risk that electromagnetic noise transmitted to the display unit may cause the display unit to malfunction.

[0005] The present disclosure has been made in consideration of the above-described circumstances, and has an object to provide a display device capable of suppressing malfunction of a display due to electromagnetic noise. [Means for solving the problem]

[0006] In order to achieve the above object, the display device according to the present disclosure comprises: a display having a display panel for displaying information and a display case made of a conductive material and housing the display panel; a case member that houses the display unit so as to cover a rear side of the display unit; a circuit board having a ground pattern portion, the circuit board being located on the rear surface side of the case member and having a hole through which a shank of a screw passes; a ground member formed of a conductive material that causes static electricity carried by the display panel to flow from the display case to the ground pattern portion, the display case includes a boss portion that is located on a rear surface side of the display case and into which a shaft portion of the screw is screwed; the case member includes an accommodation portion that accommodates the boss portion and the ground member, The storage section includes: a bottom portion having a hole through which the shank of the screw passes and positioned between the boss portion and the circuit board; an exposure hole portion formed so that an accommodation space of the accommodation portion is connected to a front surface of the circuit board; The ground member is a sandwiched portion sandwiched between the boss portion and the bottom portion; a ground contact portion exposed to the circuit board through the exposure hole portion and in contact with the ground pattern portion, The screws fasten the display, the circuit board, the case member, and the ground member together. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a display device capable of suppressing malfunction of a display due to electromagnetic noise. [Brief description of the drawings]

[0008] [Figure 1] 1 is a schematic front view of a display device according to an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a schematic cross-sectional view taken along line II-II of FIG. 1 according to the embodiment. [Diagram 3] FIG. 3 is a schematic enlarged view of an area surrounded by III in FIG. 2 according to the embodiment. [Figure 4] 4 is a schematic cross-sectional view taken along line IV-IV in FIG. 3 according to the embodiment of the present invention. [Diagram 5] FIG. 2 is a schematic perspective view of the display device according to the embodiment with a lower case removed; [Figure 6] FIG. 2 is a schematic perspective view of the display device according to the embodiment with a lower case and a circuit board removed; [Figure 7] FIG. 7 is a schematic enlarged view of a region surrounded by VI in FIG. 6 according to the embodiment. [Figure 8A] FIG. 4 is a plan view of the ground plate according to the above embodiment. [Figure 8B] FIG. 4 is a side view of the ground plate according to the above embodiment. [Figure 9] FIG. 2 is a schematic perspective view of the display device according to the embodiment, in which an inner case is shown as transparent; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device according to an embodiment of the present disclosure will be described with reference to the drawings. The display device is a vehicle display device that is installed in a vehicle as an instrument.

[0010] As shown in Fig. 1, the display device 10 includes an image display surface 11 and a warning icon lighting section 12. The image display surface 11 is an area where vehicle information such as vehicle speed is displayed. The warning icon lighting section 12 is an area where warning icons are lit up. The warning icon lighting sections 12 are disposed on both the left and right sides of the image display surface 11 as viewed by a viewer.

[0011] As shown in FIG. 2, the display device 10 includes an upper case 15, a mask 20, a dial 30, a display 40, a middle case 50, a circuit board 60, a lower case 70, a plurality of screws 90, and a plurality of ground plates 80. In the following description, the upward direction Ud, downward direction Dd, left direction Ld, and right direction Rd are defined based on the viewpoint of the viewer of the display device 10, the direction toward the viewer is defined as the forward direction Fd, and the direction toward the viewer is defined as the rearward direction Bd.

[0012] The lower case 70 is box-shaped and opens in the forward direction Fd, and houses the dial 30, the display 40, the middle case 50, the circuit board 60, and the ground plate 80. The lower case 70 includes a bottom plate portion 71 and a side wall portion 72 standing on the bottom plate portion 71. The side wall portion 72 stands from the outer circumferential end portion of the bottom plate portion 71 in the forward direction Fd. 3 and 4, the bottom plate portion 71 is formed with a plurality of recesses 71a recessed in the forward direction Fd of the bottom plate portion 71. A through hole 71h through which the shaft portion 92 of the screw 90 passes is formed in the front plate portion 71b of each recess 71a in the forward direction Fd.

[0013] 2, the upper case 15 is a lid that closes the opening of the lower case 70. The upper case 15 includes a side wall portion 16 made of a light-shielding material, and a light-transmitting window portion 17 made of a light-transmitting material that is fitted into the side wall portion 16 in the forward direction Fd.

[0014] The circuit board 60 is a PCB (Printed Circuit Board), and is equipped with a control unit (e.g., a microcontroller) that controls the operation of the display device 10, LEDs (Light Emitting Diodes), and other electronic components. As shown in Figs. 3 and 4, the rear surface of the circuit board 60 is in surface contact with the lower case 70 (more precisely, the surface of the front plate portion 71b in the forward direction Fd). The front surface of the circuit board 60 is in surface contact with the middle case 50 (more precisely, the surface of the bottom portion 52b in the rear direction Bd, which will be described later) and the ground plate 80 (more precisely, the ground contact portion 82, which will be described later). The circuit board 60 is formed with a plurality of through holes 60h through which the shaft portions 92 of the screws 90 pass. 4 and 5, the circuit board 60 includes a plurality of ground pattern portions 61 formed of copper foil on the front surface of the circuit board 60. The ground pattern portions 61 are connected to the ground via a circuit pattern and a connection cable (not shown). As shown in FIG. 8A, the ground pattern portion 61 is formed in a size that includes a ground contact portion 82 (described later) of the ground plate 80 when viewed in the thickness direction (front-rear direction Fd, Bd) of the circuit board 60. The ground pattern portion 61 is formed in a size larger than the ground contact portion 82 and in a similar shape (including not only a completely similar shape but also an approximately similar shape) of the ground contact portion 82. That is, the ground pattern portion 61 has a size and shape that is one size larger than the ground contact portion 82. The size of the ground pattern portion 61 is formed to be larger than the size of the ground contact portion 82 by a margin M so as to include the ground contact portion 82. This makes it easy to maintain the ground contact portion 82 in a conductive state with the ground pattern portion 61 even when the position of the ground contact portion 82 relative to the ground pattern portion 61 is shifted due to dimensional tolerances, assembly errors, loose screws, or the like.

[0015] As shown in FIG. 2, the display 40 includes a liquid crystal display panel 41 and a display case . The liquid crystal display panel 41 receives light from a built-in light source (not shown) and displays an image on the image display surface 11 (see FIG. 1). The display case 42 covers the rear and side surfaces of the liquid crystal display panel 41. The display case 42 is made of metal, which is a conductive material. The display case 42 has a plurality of boss portions 43 (four in this example) disposed on the rear surface of the display case 42. The boss portions 43 are made of metal, which is a conductive material, and are disposed at each corner of the rear surface of the display case 42. As shown in FIGS. 3 and 4, the boss portion 43 has a cylindrical shape and is formed with a screw hole 43h that opens toward the rear direction Bd.

[0016] 2, the dial 30 is disposed on the outer periphery of the surface of the liquid crystal display panel 41 in the forward direction Fd, and has a frame plate shape. The dial 30 lights up a warning icon when it receives light from an LED (not shown) mounted on the front surface of the circuit board 60. The dial 30 is formed by forming a light-shielding layer on a light-transmitting base material except for the shape of the icon. The mask 20 has a frame shape that is placed on the outer periphery of the face of the dial 30 in the forward direction Fd, and functions as a light-blocking parting material.

[0017] The middle case 50 has a box shape that opens toward the front direction Fd, and houses the display device 40 therein. 3, 4, 6 and 7, the inner case 50 has a plurality of accommodating recesses 52 each accommodating a ground plate 80. Each accommodating recess 52 is formed in a concave shape on the bottom surface of the inner case 50. 6, four accommodating recesses 52 are provided, two in each of the left-right directions Ld, Rd and the front-rear directions Fd, Bd. Each accommodating recess 52 has a substantially rectangular box shape that opens in the front direction Fd. As shown in FIGS. 4, 7 and 9, each accommodating recess 52 includes a side wall portion 52a, a bottom portion 52b, an exposure hole portion 52c, a slit portion 52d, and a holding portion 52e.

[0018] The side wall portion 52a is formed so as to surround the bottom portion 52b, the exposure hole portion 52c, and the holding portion 52e. The side wall portion 52a stands on the bottom portion 52b and has a rectangular frame shape when viewed from the front direction Fd. The bottom portion 52b has a rectangular plate shape that comes into surface contact with the front surface of the circuit board 60. A through hole 52h through which the shaft portion 92 of the screw 90 passes is formed in the bottom portion 52b.

[0019] The exposure hole portion 52c is formed as a hole, for example, a rectangular through hole, by hollowing out a part of the bottom portion 52b. The exposure hole portion 52c is formed so as to expose the accommodation space inside the accommodation recess 52 to a part of the front surface of the circuit board 60. The holding portion 52e presses a part of a ground contact portion 82 (described later) of the ground plate 80 against the circuit board 60. The holding portion 52e is plate-shaped and located inside the exposure hole portion 52c on the opposite side to the bottom portion 52b, and is provided at a position in the forward direction Fd from a rear surface 52b1 of the bottom portion 52b, in other words, at a position away from the front surface of the circuit board 60.

[0020] The slit portion 52d is formed at an end of the bottom portion 52b opposite to the holding portion 52e. The slit portion 52d is formed as a long through hole in the up-down direction Ud, Dd, and a tip portion 81b (described later) of the ground plate 80 is positioned therein. The size of the slit portion 52d is such that the slit portion 52d does not come into contact with the tip portion 81b. The slit portion 52d is formed to facilitate the assembly of the ground plate 80 to the receiving recess 52. Even if the ground plate 80 is misaligned with respect to the shaft portion 92 of the screw 90 (misaligned to the right direction Rd in FIG. 4), the tip portion 81b of the ground plate 80 is positioned within the slit portion 52d, so that the ground plate 80 is prevented from falling off.

[0021] 7, the slit portion 52d, the bottom portion 52b, the exposure hole portion 52c, and the holding portion 52e are arranged in the left-right direction Ld, Rd. From the outside to the inside in the left-right direction Ld, Rd, the slit portion 52d, the bottom portion 52b, the exposure hole portion 52c, and the holding portion 52e are provided in this order.

[0022] As shown in FIGS. 4, 8A, and 8B, the ground plate 80 is made of a metal, which is a conductive material that allows static electricity carried by the liquid crystal display panel 41 to flow from the display case 42 to the ground pattern portion 61.

[0023] The ground plate 80 includes a clamped portion 81, a ground contact portion 82, a stepped portion 83, and a screw shaft passing hole portion 84. The clamped portion 81 is a portion that is clamped between the boss portion 43 and the bottom portion 52b. The clamped portion 81 is shaped like a U-shaped plate that surrounds the periphery of the shaft portion 92 of the screw 90. The clamped portion 81 has a boss contact area 81a (see Figs. 8A and 9) on a surface of the clamped portion 81 in the forward direction Fd. The boss contact area 81a is an area that comes into contact with an annular end face of the boss portion 43 in the rear direction Bd, and is located on the inner peripheral edge side of the U-shaped plate-shaped clamped portion 81. The boss contact area 81a extends in the left-right directions Ld, Rd (the longitudinal direction of the ground plate 80) and is formed so as to face each other in the up-down directions Ud, Dd. The held portion 81 has a tip portion 81b which is the end opposite to the step portion 83. The tip portion 81b is inserted into the slit portion 52d of the accommodating recess 52. The tip portion 81b has an outer circumferential surface formed with a curved portion 81c which is rounded into an arc shape.

[0024] The ground contact portion 82 is exposed to the rear surface of the accommodating recess 52 through the exposure hole 52c and comes into contact with the ground pattern portion 61. The ground contact portion 82 has a U-shaped or C-shaped plate shape that opens toward the clamped portion 81. The ground contact portion 82 is located in the rear direction Bd from the clamped portion 81. The ground contact portion 82 is clamped between the holding portion 52e and the circuit board 60. 4, the ground contact portion 82 has a contact surface 82a that comes into contact with the ground pattern portion 61. The contact surface 82a is located on the same plane as the rear surface 52b1 of the bottom portion 52b of each accommodating recess 52. This same plane is a surface that fits along the front surface of the circuit board 60. Therefore, the contact surface 82a and the rear surface 52b1 of the bottom portion 52b are both configured to be able to come into surface contact with the front surface of the circuit board 60. This makes it possible to bring each accommodating recess 52 and the ground contact portion 82 into close contact with the front surface of the circuit board 60 by the fastening force of the screw 90.

[0025] The step portion 83 is located between the clamped portion 81 and the ground contact portion 82 in the longitudinal direction (left-right directions Ld, Rd) of the ground plate 80, and connects the clamped portion 81 and the ground contact portion 82 so that they are at different positions in the thickness direction of the ground plate 80. The step portion 83 is inclined toward the rear direction Bd as it approaches the ground contact portion 82 from the clamped portion 81. The step portion 83 intersects with the clamped portion 81 and the ground contact portion 82 at an obtuse angle. The step portion 83 elastically deforms to absorb the force with which the ground contact portion 82 is clamped between the holding portion 52e and the circuit board 60. This makes it difficult for the force to be transmitted to the clamped portion 81, and prevents the clamped portion 81 from jumping up in the forward direction Fd.

[0026] The screw shaft passing hole 84 penetrates the ground plate 80 in the thickness direction and is formed as an elongated hole in a range covering the clamped portion 81, the ground contact portion 82, and the stepped portion 83 in the longitudinal direction (left-right directions Ld, Rd) of the ground plate 80. In other words, the ground plate 80 has a stepped frame plate shape surrounding the periphery of the screw shaft passing hole 84. A shaft portion 92 of a screw 90 passes through the end of the screw shaft passing hole 84 on the clamped portion 81 side.

[0027] The multiple screws 90 are fastening members that integrate the lower case 70, the circuit board 60, the middle case 50, the display 40 (display case 42), and the ground plate 80 by fastening them together. The fastening force of each screw 90 acts to clamp the clamped portion 81 of the ground plate 80 between the boss portion 43 of the display case 42 and the bottom portion 52b of the middle case 50. As shown in FIGS. 3 and 4, each screw 90 includes a head portion 91 and a shaft portion 92 . The head 91 is located around the through hole 71h and on the surface in the rear direction Bd of the front plate 71b of the lower case 70. The shaft 92 passes from the head 91 side through the through hole 71h of the lower case 70, the through hole 60h of the circuit board 60, the through hole 52h of the middle case 50, and the screw shaft passing hole 84 of the ground plate 80, and is screwed into the screw hole 43h of the boss 43. The held portion 81 of the ground plate 80, the bottom 52b of the accommodating recess 52, the circuit board 60, and the front plate 71b of the lower case 70 are sandwiched between the head 91 and the boss 43.

[0028] Next, there will be described a method for assembling the display device 10. The assembly order below is an example, and the order can be changed as appropriate. Each ground plate 80 is assembled into each accommodating recess 52. Specifically, the tip 81b of the ground plate 80 is passed through the exposure hole 52c and then inserted into the slit 52d. At this time, the curved portion 81c of the tip 81b prevents the tip 81b from being damaged even if it comes into contact with the slit 52d or the like. Then, each boss portion 43 is placed in each accommodating recess 52, the rear surface 52b1 of each accommodating recess 52 is placed on the front surface of the circuit board 60, and the rear surface of the circuit board 60 is brought into contact with the bottom plate portion 71 of the lower case 70. Then, by tightening a plurality of screws 90, a unit is completed in which the lower case 70, the circuit board 60, the middle case 50, the display device 40, and the ground plate 80 are integrated. The display device 10 is completed by attaching the dial 30 and the mask 20 to this unit and then fitting the upper case 15.

[0029] (effect) According to the embodiment described above, the following effects are achieved. (1) The display device 10 includes a display 40 having a liquid crystal display panel 41, which is an example of a display panel that displays information, and a display case 42 formed of a conductive material that houses the liquid crystal display panel 41, an inner case 50, which is an example of a case member that houses the display 40 so as to cover the rear side of the display 40, a circuit board 60 having a ground pattern portion 61, located on the rear side of the inner case 50, and having a through hole 60h through which a shaft portion 92 of a screw 90 passes, and a ground plate 80, which is an example of a ground member formed of a conductive material that flows static electricity carried by the liquid crystal display panel 41 from the display case 42 to the ground pattern portion 61. The display case 42 is located on the rear side of the display case 42 and includes a boss portion 43 into which the shaft portion 92 of the screw 90 is screwed. The inner case 50 includes a plurality of housing recesses 52, which are an example of a housing portion that houses the boss portion 43 and the ground plate 80. The accommodating recess 52 has a through hole 52h through which the shaft 92 of the screw 90 passes, and includes a bottom 52b located between the boss 43 and the circuit board 60, and an exposure hole 52c formed so that the accommodating space of the accommodating recess 52 is connected to the front surface of the circuit board 60. The ground plate 80 includes a clamped portion 81 clamped between the boss 43 and the bottom 52b, and a ground contact portion 82 exposed to the circuit board 60 through the exposure hole 52c and in contact with the ground pattern portion 61. The screw 90 fastens the display 40, the circuit board 60, the inner case 50, and the ground plate 80 together. According to this configuration, the ground plate 80 allows static electricity that has built up on the liquid crystal display panel 41 due to electromagnetic noise from the surroundings to flow from the display case 42 to the ground pattern portion 61. As a result, malfunction of the display 40 can be suppressed. Furthermore, since the display unit 40, the circuit board 60, the inner case 50 and the ground plate 80 are integrated with the screws 90, the assembly of the display device 10 is simple. In addition, since the clamped portion 81 of the ground plate 80 is sandwiched between the boss portion 43 and the bottom portion 52b, a sufficient contact area between the ground plate 80 and the boss portion 43 can be secured, thereby ensuring the earthing function of the ground plate 80.

[0030] (2) The ground plate 80 has a step portion 83 that connects the clamped portion 81 and the ground contact portion 82 such that the ground contact portion 82 is located in the rear direction Bd from the clamped portion 81. The rear surface 52b1 of the accommodating recess 52 facing the circuit board 60 is located on the same plane as the contact surface 82a, which is the rear surface of the ground contact portion 82 facing the circuit board 60, and contacts the front surface of the circuit board 60. With this configuration, the fastening force of the screw 90 can bring the rear surface 52b1 of the accommodating recess 52 into close contact with the front surface of the circuit board 60, so that the ground contact portion 82 can be brought into contact with the ground pattern portion 61 reliably.

[0031] (3) The accommodating recess 52 includes the holding portion 52 e that sandwiches the ground contact portion 82 between itself and the ground pattern portion 61 . According to this configuration, the ground contact portion 82 can be reliably brought into contact with the ground pattern portion 61 in a conductive state.

[0032] (4) The accommodating recess 52 has a slit portion 52d in which the tip portion 81b of the clamped portion 81 opposite the ground contact portion 82 is located. According to this configuration, the ground plate 80 can be easily inserted into the accommodating recess 52 by utilizing the slit portion 52d.

[0033] (5) The display device 10 includes a lower case 70 that houses a display 40, a middle case 50, a circuit board 60, and a ground plate 80. The lower case 70 is located on the rear side of the circuit board 60 and includes a bottom plate portion 71 in which a through hole 71h is formed through which a shaft portion 92 of a screw 90 passes. The screw 90 fastens the display 40, the circuit board 60, the middle case 50, the lower case 70, and the ground plate 80 together. According to this configuration, the display device 10 can be easily assembled since the display unit 40, the circuit board 60, the middle case 50, the lower case 70, and the ground plate 80 are integrated with the screws 90.

[0034] The present invention is not limited to the above-described embodiment and drawings. Modifications (including the deletion of components) can be made as appropriate within the scope of the present invention. An example of a modification will be described below.

[0035] (Modification) In the above embodiment, the screw shaft passing hole portion 84 was formed as a long hole extending through the clamped portion 81, the ground contact portion 82, and the step portion 83, but it may also be formed as a round hole formed in the clamped portion 81.

[0036] In the above embodiment, the display 40 is a type including a liquid crystal display panel 41, but is not limited to this and may be an organic EL (Electro-Luminescence) display panel.

[0037] In the above embodiment, the display device 10 was provided with four sets of boss portions 43, accommodating recesses 52, ground plates 80, and screws 90, but the number of sets is not limited to four, and may be three sets or less, or five sets or more. In the above embodiment, the lower case 70, the circuit board 60, the middle case 50, and the display 40 are fastened together by the screw 90, but the lower case 70 does not have to be fastened together with the circuit board 60, the middle case 50, and the display 40. In this case, the lower case 70 may be fixed to the middle case 50 or the circuit board 60 by a different screw. In the above embodiment, the slit portion 52d of the accommodating recess 52 may be omitted. In the above embodiment, the ground plate 80 may be insert molded in the receiving recess 52 . The through holes 52h, 60h, and 71h may be formed as notches. Similarly, the screw shaft passing hole 84 of the ground plate 80 may be formed as a notch. In the above embodiment, the warning icon lighting unit 12 may be omitted. In the above embodiment, the ground pattern portion 61 is not limited to having a shape similar to that of the ground contact portion 82, and may be formed in a rectangular shape that encompasses the ground contact portion 82 when viewed in the front-rear direction Fd, Bd. In the above embodiment, the step portion 83 may intersect with the clamped portion 81 and the ground contact portion 82 at an angle of 90° or less. In addition, the clamped portion 81, the ground contact portion 82, and the step portion 83 are integrally formed, but this is not limited thereto, and they may be formed separately and connected by a connecting means.

[0038] In the above description, descriptions of well-known technical matters have been omitted as appropriate in order to facilitate understanding of the present disclosure.

[0039] Various embodiments and modifications of the present invention are possible without departing from the broad spirit and scope of the present invention. The above-described embodiments are for the purpose of explaining the present invention and do not limit the scope of the present invention. That is, the scope of the present invention is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and the scope of the invention equivalent thereto are considered to be within the scope of the present invention.

[0040] The above-described embodiment and modified examples disclose, for example, the technical ideas described in the following supplementary notes. (Appendix 1) a display having a display panel for displaying information and a display case made of a conductive material and housing the display panel; a case member that houses the display unit so as to cover a rear side of the display unit; a circuit board having a ground pattern portion, the circuit board being located on the rear surface side of the case member and having a hole through which a shank of a screw passes; a ground member formed of a conductive material that causes static electricity carried by the display panel to flow from the display case to the ground pattern portion, the display case includes a boss portion that is located on a rear surface side of the display case and into which a shaft portion of the screw is screwed; the case member includes an accommodation portion that accommodates the boss portion and the ground member, The storage section includes: a bottom portion having a hole through which the shank of the screw passes and positioned between the boss portion and the circuit board; an exposure hole portion formed so that an accommodation space of the accommodation portion is connected to a front surface of the circuit board; The ground member is a sandwiched portion sandwiched between the boss portion and the bottom portion; a ground contact portion exposed to the circuit board through the exposure hole portion and in contact with the ground pattern portion, The screws fasten the display, the circuit board, the case member, and the ground member together. Display device.

[0041] (Appendix 2) the ground member includes a step portion that connects the clamped portion and the ground contact portion such that the ground contact portion is located rearward of the clamped portion, a rear surface of the housing portion facing the circuit board is located on the same plane as a rear surface of the ground contact portion facing the circuit board and is in contact with a front surface of the circuit board; 2. A display device according to claim 1.

[0042] (Appendix 3) the housing portion includes a holding portion that sandwiches the ground contact portion between the housing portion and the ground pattern portion, 3. The display device according to claim 1 or 2.

[0043] (Appendix 4) The housing portion includes a slit portion in which a tip portion of the clamped portion on a side opposite to the ground contact portion is located. 4. A display device according to any one of claims 1 to 3.

[0044] (Appendix 5) a lower case that accommodates the display, the case member, the circuit board, and the ground member; the lower case is located on a rear side of the circuit board and includes a bottom plate portion having a hole through which the shank of the screw passes; The screws fasten the display, the circuit board, the case member, the lower case, and the ground member together. 5. A display device according to any one of claims 1 to 4. [Explanation of symbols]

[0045] 10: display device, 11: image display surface, 12: warning icon lighting section 15: upper case, 16: side wall, 17: light-transmitting window 20. Mask 30…Dial 40...display, 41...liquid crystal display panel, 42...display case, 43...boss portion, 43h...screw hole 50... middle case, 52... accommodation recess, 52a... side wall portion, 52b... bottom portion, 52b1... rear surface, 52c... exposure hole portion, 52d... slit portion, 52e... holding portion, 52h... through hole 60: circuit board; 60h: through hole; 61: ground pattern portion 70: lower case, 71: bottom plate portion, 71h: through hole, 71a: recess, 71b: front plate portion, 72: side wall portion 80: ground plate, 81: clamped portion, 81a: boss contact area, 81b: tip portion, 81c: curved portion, 82: ground contact portion, 82a: contact surface, 83: step portion, 84: screw shaft passage hole portion 90...screw, 91...head, 92...shaft Ud…upward direction, Dd…downward direction, Ld…leftward direction, Rd…rightward direction, Fd…forward direction, Bd…backward direction M: Extra

Claims

1. a display having a display panel for displaying information and a display case made of a conductive material and housing the display panel; a case member that houses the display unit so as to cover a rear side of the display unit; a circuit board having a ground pattern portion, the circuit board being located on the rear surface side of the case member and having a hole through which a shank of a screw passes; a ground member formed of a conductive material that causes static electricity carried by the display panel to flow from the display case to the ground pattern portion, the display case includes a boss portion that is located on a rear surface side of the display case and into which a shaft portion of the screw is screwed; the case member includes an accommodation portion that accommodates the boss portion and the ground member, The storage section includes: a bottom portion having a hole through which the shank of the screw passes and positioned between the boss portion and the circuit board; an exposure hole portion formed so that an accommodation space of the accommodation portion is connected to a front surface of the circuit board, The ground member is a sandwiched portion sandwiched between the boss portion and the bottom portion; a ground contact portion exposed to the circuit board through the exposure hole portion and in contact with the ground pattern portion, The screws fasten the display, the circuit board, the case member, and the ground member together. Display device.

2. the ground member includes a step portion that connects the clamped portion and the ground contact portion such that the ground contact portion is located rearward of the clamped portion, a rear surface of the housing portion facing the circuit board is located on the same plane as a rear surface of the ground contact portion facing the circuit board and is in contact with a front surface of the circuit board; The display device according to claim 1 .

3. the housing portion includes a holding portion that sandwiches the ground contact portion between the housing portion and the ground pattern portion, The display device according to claim 1 .

4. The housing portion includes a slit portion in which a tip portion of the clamped portion on a side opposite to the ground contact portion is located. The display device according to claim 1 .

5. a lower case that accommodates the display, the case member, the circuit board, and the ground member; the lower case is located on a rear side of the circuit board and includes a bottom plate portion having a hole through which the shank of the screw passes; The screws fasten the display, the circuit board, the case member, the lower case, and the ground member together. The display device according to claim 1 .

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