JP7095517B2 - Display device - Google Patents

Description

The present invention relates to a display device mounted on a vehicle or the like.

Patent Document 1 discloses a vehicle information providing device 100 having a circuit board 301 located on the back side of the vehicle information providing device 100 and an exciter 223 located on the front side of the vehicle information providing device 100. .. The exciter 223 is connected to the circuit board 301 by electric cords 223a and 223b. The electric cords 223a and 223b are routed from the back surface of the circuit board 301 to the exciter 223 arranged on the back surface of the fluoroscopic panel 307 through the outside of the facing member 306.

Japanese Unexamined Patent Publication No. 2006-23204

As in Patent Document 1, when the electric cord connected to the circuit board is routed around the outside of the return member, there is a problem that the length of the electric cord becomes long. Further, when the electric cord is exposed to the outside of the facing member, there is a problem that the workability is lowered when the display device is attached to the vehicle.

The present invention has been made in consideration of such circumstances, and an object of the present invention is to provide a display device capable of improving the arrangement efficiency of parts.

In order to solve the above-mentioned problems, the display device according to the present invention has an outer case, a circuit board housed inside the outer case, and a circuit board housed inside the outer case and connected to the circuit board by a cord. With a notch that supports the circuit board on one of the front side and the rear side, supports the electronic component on the other side of the front side and the rear side, and delivers the cord in the front-rear direction. A case is provided, and the notch is formed continuously from an inlet end located on the peripheral edge of the middle case and guiding the cord to the notch, an end of the notch, and the inlet end to the end. It has a plurality of guide paths through which the cord is passed, and a plurality of guide paths in which continuous guide paths are formed in different directions.

In the display device according to the present invention, the efficiency of arranging parts can be improved.

An exploded perspective view of a display device as an embodiment of the display device according to the present invention. The perspective view which shows the main circuit board and the middle case from the rear side. Rear view of the display device with the lower case removed. Explanatory drawing which shows the main circuit board and the middle case from the front side. Enlarged view of the notch.

An embodiment of the display device according to the present invention will be described with reference to the accompanying drawings. The display device according to the present invention is mounted on a vehicle such as an automobile or a two-wheeled vehicle, a ship, an agricultural machine, or a construction machine.

FIG. 1 is an exploded perspective view of a display device 1 as an embodiment of the display device according to the present invention.
FIG. 2 is a perspective view showing the main circuit board 20 and the middle case 33 from the rear side.
FIG. 3 is a rear view of the display device 1 from which the lower case 32 is removed.
FIG. 4 is an explanatory view showing the main circuit board 20 and the middle case 33 from the front side.
FIG. 5 is an enlarged view of the notch 60.

In the present embodiment, an example will be described in which the electronic components are an external light sensor 41 for detecting the illuminance of external light (external light) for controlling the brightness of the display panel 10, and a sensor circuit board 42.

In the following description, "front (front)", "rear (rear)", "top", "bottom", "right", and "left" are the definitions "Fr.", "Fr." Follow "Re.", "To.", "Bo.", "R", and "L".

The display device 1 mainly includes a display panel 10, a main circuit board 20, a case 30, and an external light sensor unit 40.

The display panel 10 is a TFT (Thin Film Transistor) type liquid crystal display panel (the display image portion emits light (illumination color) and the background portion blocks light (black)). The display panel 10 is connected to the main circuit board 20 by a flexible printed circuit board. The display panel 10 displays an image by being illuminated from the rear side by a light source for a backlight provided on the main circuit board 20. The display panel 10 displays, for example, an image related to a vehicle state such as a vehicle speed.

The main circuit board 20 (circuit board) includes a light source 21, a control unit including a display panel 10 and a driver for the light source 21, and a connector 22 for receiving the detection result of the external light sensor 41 from the external light sensor unit 40. Mainly has.

The light source 21 is an LED (Light Emitting Diode), and is provided at a plurality of locations on the front surface 20a of the main circuit board 20. The light source 21 has a light source 21a for the design 35c and a light source (not shown) for the backlight of the display panel 10. A plurality of light sources 21a for the design 35c are provided according to the number and position of the design 35c of the display device 1. The light source for the backlight is provided at a required position on the rear side of the display panel 10, for example.

The control unit has a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like, and executes predetermined arithmetic processing according to, for example, a program written in the ROM. The control unit acquires various vehicle information from, for example, an ECU (Electronic Control Unit) of the vehicle. The control unit controls the display panel 10 and turns on the light source 21 based on the acquired information. Further, the control unit controls the brightness of the display panel 10 based on the information regarding the external light acquired from the external light sensor 41.

The connector 22 is provided on the back surface 20b of the main circuit board 20. The connector 22 has an insertion port facing downward (direction parallel to the plane of the circuit board 20), and is connected to the rear connector 44b of the cord 43 extending from the lower side to the upper side.

The external light sensor unit 40 detects the illuminance of the external light of the display device 1 and transmits it to the main circuit board 20. The external light sensor unit 40 includes an external light sensor 41, a sensor circuit board 42, and a cord 43. The external light sensor 41 and the sensor circuit board 42 are examples of electronic components housed inside the outer case and connected to the circuit board (main circuit board 20) by a cord (code 43).

The external light sensor 41 is, for example, a photodiode, and detects the illuminance of external light. The sensor circuit board 42 mounts the external light sensor 41, and transmits the information acquired by the external light sensor 41 to the main circuit board 20. The sensor circuit board 42 has a connector 45 on the back surface. The sensor circuit board 42 has a screw hole 46 for being screwed to the middle case 33 by a screw 50. The connector 45 has an insertion port facing rearward, and is connected to the front connector 44a of the cord 43 extending from the rear to the front at the time of arrangement. The cord 43 is a bundle of a required number of cords, one end of which is connected to the sensor circuit board 42 via the front connector 44a and the other end of which is connected to the main circuit board 20 via the rear connector 44b.

The case 30 has an upper case 31, a lower case 32, and a middle case 33.

The upper case 31 (outer case) is a light-shielding resin (for example, black ABS resin). The upper case 31 has a box shape with an open rear side, and is a front surface of the display device 1 and side surfaces on the left, right, top, and bottom. The upper case 31 has a panel 35 provided by insert molding on the front surface 31a. The panel 35 is a smoke-colored translucent resin (for example, PMMA (Polymethylcrylic)). The panel 35 has a light-shielding printing layer 36a and a smoke printing layer 36b.

The light-shielding printing layer 36a is a layer having a light-shielding property provided on the back surface (or front surface) of the panel 35, and is formed by printing with black ink. The light-shielding printing layer 36a is formed in a region other than the display region 35a of the display panel 10, the sensor window 35b of the external light sensor 41, and the design 35c, which are regions to be shielded from light in the panel 35, that is, regions to be transmitted. As a result, the display area 35a makes the viewer visually recognize the image displayed on the display panel 10 via the panel 35. Further, the sensor window 35b takes in external light to the external light sensor 41 via the panel 35. Further, in the design 35c, a region formed in a character shape according to the shape of the design 35c is illuminated by the light of the light source 21a, thereby indicating necessary information (in the example of FIG. 1, the state of the direction indicator). Arrow) lights up.

The smoke printing layer 36b is a semi-transparent layer provided on the back surface (or front surface) of the sensor window 35b, and is formed by printing with smoke-colored ink. The smoke printing layer 36b is printed with ink having a color darker than the smoke color of the panel 35 itself in order to shield the external light sensor 41 from being visually recognized by the viewer through the panel 35.

The lower case 32 (outer case) is a light-shielding resin (for example, black polypropylene). The lower case 32 covers the rear side of the main circuit board 20 and is fitted with the upper case 31 to be an external component on the back side of the display device 1.

The middle case 33 is a light-shielding resin (for example, white polypropylene) and supports the display panel 10, the main circuit board 20, and the external light sensor unit 40 inside the upper case 31. Specifically, the middle case 33 supports the main circuit board 20 on the rear side and the external light sensor unit 40 on the front side. The middle case 33 has a partition wall 33a, a sensor support recess 37, a notch 60, and a cord support portion 38.

The partition wall 33a surrounds each light source 21a to form a partition 33b. The partition wall 33a is a tubular wall extending in the front-rear direction that divides the illumination (emission) region of the light source 21a, and the light of the light source 21a passes through the partition 33b from the rear side to the front side. The partition wall 33a has a rear opening end 33c and a front opening end 33d. The rear opening end 33c is an opening end located on the rear side and is in contact with the main circuit board 20. The front opening end 33d is an opening end located on the front side and is in contact with the panel 35 of the upper case 31.

The sensor support recess 37 is provided on the front surface of the middle case 33 at a position where the sensor circuit board 42 is arranged (FIG. 4). The sensor support recess 37 is a recess in the back direction that accommodates the sensor circuit board 42, which corresponds to the shape of the sensor circuit board 42. Further, the sensor support recess 37 has a screw hole 37a for screwing the sensor circuit board 42.

The notch 60 passes the cord 43 in the front-rear direction. The notch 60 has an inlet end 61, an end 62, two (plural) guide paths 65, 66, and a convex portion 67.

The entrance end 61 is located on the peripheral edge 33e of the middle case 33, is connected to the notch 60 (guide path 65) of the cord 43, and serves as an entrance to the notch 60. The end 62 is the end of the notch 60 (guideway 66) with respect to the inlet end 61.

The plurality of guide paths 65 and 66 are continuously formed between the inlet end 61 and the end 62, and serve as a path for the cord 43 (passing the cord 43). The continuous guide paths 65 and 66 are formed in different directions. That is, the guide path 65 (hereinafter, simply referred to as "upper and lower guide paths 65") is formed from the bottom to the top, and the guide path 66 (hereinafter, simply referred to as "left and right guide paths 66") is formed from the left to the right. As a result, the guide paths 65 and 66 are formed in a continuous abbreviation (substantially L-shaped) intersecting each other at a substantially right angle.

The convex portion 67 protrudes from the inner wall 60a of the notch 60 toward the left and right guide paths 66 in the vicinity of the entrance of the left and right guide paths 66 to which the end 62 belongs (one end becomes the end 62), and the cord 43 is pulled out. It is a pair of convex shapes for stopping. The pair of convex portions 67 forms a gap smaller than the diameter of the cord 43 between the tips thereof. Specifically, the pair of convex portions 67 has a gap such that the cord 43 inserted from the inlet end 61 can pass through the convex portion 67, and the cord 43 that has passed through the convex portion 67 is a left and right guide path. The 66 is formed so as to have a gap so as not to return to the inlet end 61 side. Therefore, the position where the convex portion 67 is provided may be on the inlet end 61 side of the left and right guide paths 66 with respect to the position where the cord 43 is finally supported.

The cord support portion 38 is inserted into the left and right guide paths 66 and supports the cord 43 extending in the front-rear direction with respect to the middle case 33. The cord support portion 38 is a tubular member extending substantially perpendicular to the back surface 20b of the circuit board 20 toward the rear side with respect to the back surface 33f of the middle case 33.

Next, a procedure for attaching the external light sensor unit 40 to the main circuit board 20 will be described.

First, the code 43 of the external light sensor unit 40 is inserted into the notch 60 of the middle case 33 to which the main circuit board 20 is fixed. Specifically, the cord 43 is inserted into the vertical guide path 65 from the entrance end 61, and is passed from the bottom to the top along the vertical guide path 65. At the connecting portion between the vertical guide path 65 and the left and right guide paths 66, the traveling direction of the code 43 changes by about 90 degrees, and the code 43 advances from left to right along the left and right guide paths 66. At this time, the cord 43 advances along the left and right guide paths 66 while being lightly press-fitted into the gap of the convex portion 67 provided near the entrance of the left and right guide paths 66. When the cord 43 exceeds the convex portion 67, the convex portion 67 becomes a stopper for the left and right guide paths 66, and the cord 43 is supported at that position. The cord 43 is arranged in the front-rear direction with respect to the middle case 33 while being supported by the cord support portion 38.

Next, the front connector 44a of the cord 43 and the connector 45 of the sensor circuit board 42 are connected, and the sensor circuit board 42 is arranged in the sensor support recess 37. The sensor circuit board 42 is screwed into the sensor support recess 37 by the screws 50 inserted into the screw holes 37a and 46. After that, the rear connector 44b of the cord 43 and the connector 22 of the main circuit board 20 are connected. As a result, the external light sensor unit 40 is attached to the main circuit board 20.

In such a display device 1, the external light sensor unit 40 arranged on the front side and the main circuit board 20 arranged on the rear side can be connected by a cord 43 passing through the notch 60 of the middle case 33, so that the cord 43 can be connected. It is possible to improve the arrangement efficiency of parts as compared with the case of passing through the outside of the middle case 33. Further, since the display device 1 can shorten the physical distance of the code 43, it is possible to reduce the amount of parts and improve the efficiency of the internal space.

In particular, since the cord 43 can be routed in the front-rear direction of the middle case 33, the external light sensor unit 40 as an electronic component can be suitably arranged on the front side of the display device 1. If the cord 43 cannot be routed in the front-rear direction of the middle case 33, the external light sensor unit 40 is arranged near the main circuit board 20, that is, behind the middle case 33. In this case, the external light in the vicinity of the panel 35 is received by the light guide arranged behind the sensor window 35b, and the external light is guided to the external light sensor 41 by the light guide. Therefore, the detection accuracy of the external light is lowered, and it becomes difficult to appropriately control the brightness of the display panel 10 and the like. On the other hand, the display device 1 in the present embodiment can accurately detect the illuminance of the external light by the external light sensor 41 arranged immediately after the sensor window 35b of the panel 35, and performs suitable luminance control. Can be done.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, in the above embodiment, the example in which the middle case supports the circuit board on the rear side and supports the electronic component on the front side has been described, but the circuit board is supported on the front side and the electronic component is supported on the rear side. May be good.

The cut is not limited to the case where it has two guide paths having a substantially right angle shape, and it is sufficient that the continuous guide paths have a plurality of guide paths formed in different directions. The shape and number of pieces do not matter. That is, the cord does not have to come out of the notch, and a plurality of guide paths may be formed in a crank shape, a maze shape, or a curved shape. Further, if the cord does not come out only by the shape of the notch, the convex portion for preventing the cord from coming off may be omitted.

The circuit board for the sensor may be fixed to the middle case with a hook.

1 Display device 10 Display panel 20 Main circuit board (circuit board)
20a Front 20b Back 21 Light source 21a Light source 22 Connector 30 Case 31 Upper case (outer case)
31a Front 32 Lower case (outer case)
33 Medium case 33a Partition wall 33b Section 33c Rear opening end 33d Front opening end 33e Peripheral 33f Back 35 Panel 35a Display area 35b Sensor window 35c Design 36a Light-shielding printing layer 36b Smoke printing layer 37 Sensor support recess 37a Screw hole 38 Part 40 External light sensor unit 41 External light sensor (electronic component)
42 Sensor circuit board (electronic component)
43 Cord 44a Front connector 44b Rear connector 45 Connector 46 Screw hole 50 Screw 60 Cut 60a Inner wall 61 Inlet end 62 End 65 Vertical guide (guide)
66 Left and right guideways (guideways)
67 Convex part

Claims (4)

With the outer case
The circuit board housed inside the outer case and
Electronic components housed inside the outer case and connected to the circuit board with a cord,
The circuit board is supported on one of the front side and the rear side, the electronic component is supported on the other side of the front side and the rear side, and a middle case having a notch for passing the cord in the front-rear direction is provided.
The notch is located on the peripheral edge of the middle case and is formed continuously from the inlet end for guiding the cord to the notch, the end of the notch, and the inlet end to the end, and the cord is passed through the cut. A display device having a plurality of guide paths in which continuous guide paths are formed in different directions. The display device according to claim 1, wherein the plurality of guide paths are two guide paths formed in a substantially right angle shape. The display device according to claim 1, wherein the notch has a convex portion for preventing the cord from coming off, which protrudes toward the guide path to which the end belongs. The middle case supports the circuit board on the rear side and the electronic component on the front side.
The electronic component is an external light sensor and a sensor circuit board having the external light sensor.
The display device according to claim 1, wherein the outer case has a sensor window for taking in external light into the external light sensor.

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