JP6711026B2 - Display device and method of manufacturing display device - Google Patents

Description

The present invention relates to a display device including a case in which a display unit is housed and a method for manufacturing the display device.

Conventionally, various display devices in which a display unit is housed in a case have been proposed, and disclosed in, for example, Patent Document 1. The display device includes a display unit and a case in which the display unit is housed. The display unit includes a display element called a TFT type, a backlight device that illuminates the display element, a display element, and a display element. A holder made of synthetic resin for holding the backlight device, a metal holding frame for fixing the display element and the backlight device to the holder, and an electronic device arranged behind the holder for driving the display element and turning on the light source. It is equipped with a circuit board on which components are mounted and a shield case made of steel.

In such a display device, a clearance (gap) is formed in the middle case in which the display unit is arranged in order to suppress dust generation due to abrasion of the middle case due to contact between the display unit and the middle case.

JP, 11-268557, A

However, if there is a gap between the middle case and the display area of the display unit and the opening formed in the display plate or the like that defines the visible area of the display device, there is a risk that product quality may deteriorate. A positioning structure was required to prevent the displacement of the unit.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a display device and a display device manufacturing method that can accurately position the visible region of the display device and have good commercial characteristics.

In order to achieve the above object, the present invention provides
A display unit containing a liquid crystal display element that displays an image in a shield case that forms a mounting portion for screw tightening ,
A middle case for accommodating the display unit, having a through hole corresponding to the position of the mounting portion, and an accommodating wall facing a side surface of the display unit ,
A circuit board arranged on the back side of the middle case, having a through hole corresponding to the position of the through hole of the middle case;
A screw that penetrates the through hole of the middle case and the through hole of the circuit board, and fixes the middle case and the circuit board to the mounting portion of the display unit,
The storage wall has a recessed portion that is recessed in a direction opposite to the side surface.

Also, the present invention provides a rod-shaped pin, a step of positioning and arranging the display unit with the pin in an arrangement space formed by the pin, and a middle case is arranged from the back side of the display unit to position the pin in the recess. And a step of fixing the display unit and the middle case, and a step of removing the pin from the middle case.

According to the present invention, it is possible to accurately position the visible region of a display device, and to provide a display device and a method of manufacturing the display device that have good commercial properties.

1 is a perspective view showing an inner case of a display device showing an embodiment of the present invention. FIG. 3 is an exploded perspective view of the display device.

An embodiment in which the present invention is applied to a display device for a vehicle will be described based on FIGS. 1 and 2.

The display unit 1 is a unit in which a TFT type liquid crystal display element, a holder for accommodating the liquid crystal display element, and an illuminating member for illuminating the liquid crystal display element are housed in a shield case 5.

The case 2 includes a middle case 2A formed of, for example, white synthetic resin and a lower case 2B formed of, for example, black synthetic resin.

In the present embodiment, the shield case 5 of the display unit 1 is made of a metal material and is arranged so as to cover the outer peripheral side of the liquid crystal display element. Although not shown, a flexible wiring member (FPC) is extended from the liquid crystal display element and connected to the circuit board 8 located behind it. Further, the shield case 5 is integrally formed with a plurality of mounting portions 51 to which screws 10 to be described later are screwed.

The mounting portion 51 includes a first mounting portion 51A to which only the middle case 2A is mounted, a second mounting portion 51B to which the circuit board 8 and the lower case 2B are mounted, and a third mounting portion to which the middle case 2A and the lower case 2B are mounted. 51C and a fourth mounting portion 51D which penetrates the middle case 2A and to which the circuit board 8 is mounted.

The first mounting portion 51A is screwed with a screw 10 inserted through an insertion hole 2A2 formed in the middle case 2A.

After the screw 10 inserted from the insertion hole 2B2 formed in the lower case 2B penetrates the through hole 81 of the circuit board 8 and the through hole 2A1 of the middle case 2A, the second mounting portion 51B is connected to the second board 51B. , The lower case 2B is screwed.

A through hole 2A1 and an insertion hole 2A2 are formed in the middle case 2A. The middle case 2A has a through hole 2A3 through which the screw 10 inserted into the third mounting portion 51C penetrates and a through hole 2A4 through which the fourth mounting portion 51D into which the screw 10 is inserted penetrates. ing.

Further, the middle case 2A is formed with a recess 2A6 in which the pin J is arranged in the assembling step described later. The recess 2A6 is formed by recessing the storage wall 2A51, which is the side surface of the storage portion 2A5, in the direction opposite to the side surface 1a side of the display unit 1 (the side where the display unit 1 is stored). It is desirable that the recesses 2A6 are formed at a total of four places on the storage walls 2A51 having two pairs of surfaces facing each other, but if they are formed at least at three places, the positioning effect can be expected. That is, the display unit 1 can be positioned by positioning two opposite sides of the four sides and pressing the display unit 1 against the remaining one side. The recess 2A6 is preferably a recess corresponding to the shape of the pin J, and in the present embodiment, the recess 2A6 is recessed in a semi-columnar shape in which the columnar pin J is partially arranged. It should be noted that FIG. 1B shows a state in which the pin J is positioned in the recess 2A6 of the middle case 2A.

Insertion holes 2B2 and 2B3 for inserting the screw 10 into the second mounting portion 51B and the third mounting portion 51C are formed in the lower case 2B.

As shown in FIG. 2, the circuit board 8 has an area smaller than that of the middle case 2A, and has through holes 81 and 82 for inserting the screws 10 into the second mounting portion 51B and the fourth mounting portion 51D. It is formed on the circuit board 8.

A process of assembling the display unit 1 to the middle case 2A and the lower case 2B will be described.
A plurality of rod-shaped pins J, a step of arranging the display unit 1 in the arrangement space S formed by the pins J, a step of arranging the middle case 2A from the back side of the display unit 1, the display unit 1 and the middle case 2A. And a step of arranging the circuit board 8 on the back side of the middle case 2A, a step of fixing the circuit board 8 to the middle case 2A and the display unit 1, and a lower case on the back side of the circuit board 8. The step of disposing 2B, the step of fixing the lower case 2B to the middle case 2A, and the step of pulling out the pin J from the middle case 2A will be described.

In this embodiment, four pins J are arranged on the jig 100. The four pins J are arranged so as to face each side of the display unit 1 having a rectangular outer shape. The display unit 1 is arranged in the arrangement space S formed by the pins J so that the front surface (display surface side) faces downward. Next, the middle case 2A is turned upside down so that the pin J is located in the recess 2A6 of the middle case 2A. At this time, the display unit 1 is positioned in the middle case 2A by the pin J.

The display unit 1 is housed so that the second mounting portion 51B and the fourth mounting portion 51D of the mounting portion 51 formed on the shield case 5 of the display unit 1 penetrate the through holes 2A1 and 2A4 of the middle case 2A. Store in part 2A5. The first mounting portion 51A is screwed with the screw 10 inserted from the insertion hole 2A2 of the middle case 2A.

The circuit board 8 is arranged on the back side of the middle case 2A so that the fourth mounting portion 51D passes through the through hole 2A4 of the middle case 2A and contacts the circuit board 8. The fourth mounting portion 51D is screwed after the screw 10 inserted from the insertion hole 82 of the circuit board 8 penetrates the through hole 2A4 of the middle case 2A.

The second mounting portion 51B is screwed by the screw 10 inserted from the insertion hole 2B2 of the lower case 2B. The second mounting portion 51B comes into contact with the circuit board 8, and the screw 10 is inserted from the insertion hole 2B2 formed in the lower case 2B so as to correspond to the second mounting portion 51B, and the second mounting portion 51B and the lower case 2B are connected. Tighten the screw.

The third mounting portion 51C is screwed after the screw 10 inserted from the insertion hole 2B3 formed in the lower case 2B penetrates the through hole 2A3 of the middle case 2A, and is then screwed to the display unit 1, the middle case 2A, the circuit board. 8 and the lower case 2B are fixed by screws 10.

Finally, the pin J for positioning the display unit 1 is in a state in which the pin J is pulled out from the middle case 2A and the display unit 1 is reliably positioned and fixed in the storage portion 2A5 of the middle case 2A.

Thus, the display unit 1 for displaying an image and the middle case 2A for accommodating the display unit 1 are provided, and the middle case 2A has a storage wall 2A51 facing the side surface 1a of the display unit 1, and the storage wall 2A51 has a recess 2A6 which is recessed in the direction opposite to the side surface 1a, so that when the display unit 1 is placed in the placement space S formed by the pin J, the middle case 2A is turned over and assembled. Since the pins J and the display unit 1 can be housed together, the display unit 1 can be reliably positioned with respect to the middle case 2A. By forming the concave portion 2A6 that is recessed so as to avoid the pin J in the middle case 2A, it is possible to avoid contact between the pin J and the middle case 2A and prevent damage to the middle case 2A.

In addition, a rod-shaped pin J, a step of positioning the display unit 1 in the placement space S formed by the pin J by the pin J, a step of arranging the middle case 2A from the back side of the display unit 1, and the display unit 1 The assembly of the display unit 1 to the middle case 2A is completed by the steps of fixing the middle case 2A and the middle case 2A and the step of removing the pin J from the middle case 2A, and the display area of the display unit 1 is surely attached to the middle case 2A. Can be positioned.

The present invention is not limited to this embodiment, and various modifications can be made. For example, in the present embodiment, the pin has a cylindrical shape, but it may have a prismatic shape. When the pin has a prismatic shape, the recess may also have a prismatic shape, following the pin shape.

In the present embodiment, the display unit 1, the middle case 2A, the circuit board 8 and the lower case 2B are the constituent elements, but the present invention is not limited to this embodiment, and the circuit board 8, It is also possible to remove one or both of the lower cases 2B from the components.

1 Display Unit 1a Side Surface 2A Middle Case 2A1 Through Hole 2A2 Insertion Hole 2A3 Through Hole 2A4 Through Hole 2A5 Storage Section 2A51 Storage Wall 2A6 Recess 2B Lower Case
2B2 insertion hole
2B3 insertion hole 5 shield case 8 circuit board 10 screw 51 mounting portion 51A first mounting portion 51B second mounting portion 51C third mounting portion 51D fourth mounting portion 13 display element J pin S arrangement space

Claims (2)

A display unit containing a liquid crystal display element that displays an image in a shield case that forms a mounting portion for screw tightening ,
A middle case for accommodating the display unit, having a through hole corresponding to the position of the mounting portion, and an accommodating wall facing a side surface of the display unit ,
A circuit board arranged on the back side of the middle case, having a through hole corresponding to the position of the through hole of the middle case;
A screw that penetrates the through hole of the middle case and the through hole of the circuit board, and fixes the middle case and the circuit board to the mounting portion of the display unit,
Equipped with
The display device, wherein the storage wall has a recessed portion that is recessed in a direction opposite to the side surface. A method of manufacturing a display device according to claim 1, wherein
Positioning the display unit by the pin in an arrangement space formed by a plurality of rod-shaped pins,
Arranging the middle case from the back side of the display unit to position the pin in the recess,
Fixing the display unit and the middle case,
And a step of pulling out the pin from the middle case.

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