JP4393246B2 - Liquid crystal display device and manufacturing method thereof - Google Patents

Description

  The present invention relates to a liquid crystal display device and a manufacturing method thereof.

  Conventionally, in a liquid crystal display device such as a mobile phone terminal and an in-vehicle electronic device, a glass member is generally arranged in the display opening of the front panel of the casing, and a liquid crystal panel is arranged on the back side of the glass member. (For example, see Patent Document 1). Accordingly, the user of the device can visually recognize information including the operation state of the device through the liquid crystal panel. Hereinafter, the structure of the conventional liquid crystal display device 101 will be described with reference to FIG.

  As shown in FIG. 5, the conventional liquid crystal display device 101 fixes the glass member 105 to the back surface side of the front panel 103 where the display opening 102 is formed using a double-sided tape 104. A liquid crystal panel 106 is disposed on the back side of the glass member 105, and a cushion 108 is disposed between the glass holder 105 and the panel holder 107 that holds the liquid crystal panel 106. The cushion 108 is in close contact with the glass member 105 and the panel holder 107, and prevents dust from entering the liquid crystal panel 106 side. The printed circuit board 109 of the liquid crystal panel 106 is fixed by screws 110 to a holding portion 103 a that is formed to extend on the back surface side of the front panel 103.

In this liquid crystal display device 101, a liquid crystal module having a liquid crystal panel 106, a panel holder 107 and a printed board 109, and a front panel module having a front panel 103 and a glass member 105 are separately configured. It is manufactured by assembling the liquid crystal module using the screws 110.
JP 2002-108238 A

  However, in the liquid crystal display device 101, since the liquid crystal panel 106 side is sealed when the modules are assembled with each other, when the intrusion of dust into the liquid crystal panel 106 side is found in the factory production line, the liquid crystal module is already a front panel module. It will be in the state built in. Therefore, when dust has entered, it is necessary to remove the liquid crystal module from the front panel module and perform dust removal work. At this time, since the glass member 105 is fixed to the front panel 103 and cannot be separated, the dust removing operation is extremely complicated, and a heavy burden is imposed on the operator.

  Further, the glass member 105 is handled together with the surface panel 103 during the dust removing operation, and the surface panel 103 or the glass member 105 is often damaged during the operation. That is, when the dust enters, the entire surface module is replaced, and there is a problem that the manufacturing cost increases.

  The present invention has been made in view of the above circumstances, and the purpose of the present invention is to detect dust intrusion at a factory production line at an early stage, and that dust has entered the liquid crystal panel side. It is another object of the present invention to provide a liquid crystal display device capable of easily and easily removing dust and a method for manufacturing the same.

In order to achieve the above object, according to the first aspect of the present invention, a glass member disposed in the display opening of the front panel, a liquid crystal panel disposed on the back side of the glass member, and a panel holding the liquid crystal panel A liquid crystal display device in which a display state of the liquid crystal panel is visually recognized from the outside through the glass member, the glass member includes a surface portion formed along an inner periphery of the display opening, A projection having a predetermined gap between the back surface of the front panel and a larger opening than the display opening, and a screw hole for fastening with the panel holder. fixing the member, by fastened to the panel holder side using the inserted screws into the threaded hole, the glass member, the panel holder side independently of the front panel Characterized in that was.

The invention according to claim 2 comprises a glass member disposed in a display opening of a front panel, a liquid crystal panel disposed on the back side of the glass member, and a panel holder for holding the liquid crystal panel, In the liquid crystal display device in which the display state of the liquid crystal panel is visually recognized from the outside through the glass member, the glass member has a surface portion formed along the inner periphery of the display opening, and the back surface side of the surface panel The mounting bracket is fixed to a mounting bracket that is fixed to a holding portion that is formed to extend, and the mounting bracket has a predetermined gap with the back side surface of the front panel and is formed to be larger than the display opening. A screw hole for fastening with the panel holder is formed, and the mounting member is fastened and fixed to the panel holder side by using a screw inserted into the screw hole. The front panel independently, characterized in that fixed to said panel holder side.

According to a third aspect of the invention, in manufacturing the liquid crystal display device according to the first aspect, the glass member is fixed to the panel holder side, and the liquid crystal panel, the panel holder, and the glass member have the glass member. After the module is configured, the liquid crystal module is incorporated into the front panel so that the glass member is disposed in the display opening of the front panel.

According to a fourth aspect of the present invention, in manufacturing the liquid crystal display device according to the second aspect , the glass member is fixed to the panel holder side, and the liquid crystal panel, the panel holder , the mounting bracket and the glass are fixed. After the liquid crystal module having the member is configured, the liquid crystal module is incorporated into the front panel so that the glass member is disposed in the display opening of the front panel.

  According to the present invention, dust intrusion can be detected at an early stage in a factory production line, and even if dust enters the liquid crystal panel side, dust can be easily removed.

  1 to 3 show a first embodiment of the present invention. FIG. 1 is an external perspective view of an in-vehicle audio apparatus, FIG. 2 is a side sectional view of a display unit, and FIG. 3 is a liquid crystal module as a front panel. It is explanatory drawing at the time of incorporating.

  As shown in FIG. 1, this liquid crystal display device 1 is an in-vehicle audio device incorporated in an instrument panel of a vehicle, and an occupant in a vehicle compartment is displayed by displaying the liquid crystal panel 6 through a front glass 5 as a glass member. This allows the user to visually recognize the performance state, operation state, and other information. In the present embodiment, the front glass 5, the liquid crystal panel 6, and the like are incorporated in a display unit 21 that can freely slide and rotate with respect to the chassis body 20. The display unit 21 includes a surface panel 3 that forms an outer shell, and a front glass 5 is disposed in the display opening 2 formed in the surface panel 3.

  As shown in FIG. 2, the liquid crystal display device 1 includes a panel holder 7 that holds the liquid crystal panel 6 in addition to the above-described front glass 5 and liquid crystal panel 6.

  The front glass 5 has a surface portion 5 a formed along the inner periphery of the display opening 2, and the surface portion 5 a occupies a space formed by the display opening 2. The front glass 5 has a protruding portion 5b formed larger than the display opening 2 on the back side of the front panel 3, and a screw hole 5c for fastening with the panel holder 7 is formed in the protruding portion 5b. The As shown in FIG. 2, the front glass 5 is fixed to the panel holder 7 independently of the front panel 3. In the present embodiment, a gap is formed between the front panel 3 and the front glass 5.

  The liquid crystal panel 6 is disposed on the back surface side of the front glass 5 and is installed so as to be substantially parallel to the front panel 3. The structure of the liquid crystal panel 6 is the same as that conventionally known.

  The panel holder 7 holds the liquid crystal panel 6 and the front glass 5 is fastened and fixed. The panel holder 7 is erected on the printed circuit board 9 in which the liquid crystal panel 6 is incorporated so as to protrude toward the front panel 3. The panel holder 7 is formed with an abutting portion 7a that abuts the protruding portion 5b of the front glass 5, and the abutting portion 7a is formed with a screw hole 7b corresponding to the screw hole 5c. The screw hole 7 b is screwed with a fixing screw 22 inserted through the screw hole 5 c of the windshield 5.

  The printed circuit board 9 is disposed so as to be substantially parallel to the front panel 3, and is fixed to the holding portion 3 a formed to extend on the back surface side of the front panel 3 with the fastening screw 10.

A method for manufacturing the liquid crystal display device 1 configured as described above will be described.
First, the front glass 5 is fixed using the fixing screw 22 in a state where the liquid crystal panel 6 and the panel holder 7 are incorporated in the printed circuit board 9. Thereby, as shown in FIG. 3, the liquid crystal module 23 which has the liquid crystal panel 6, the panel holder 7, the printed circuit board 9, and the front glass 5 is comprised. At this time, the liquid crystal panel 6 is sealed by the front glass 5, the panel holder 7, and the printed board 9.

  Thereafter, as shown in FIG. 3, the liquid crystal module 23 is incorporated into the front panel 3 so that the front glass 5 is disposed in the display opening 2 of the front panel 3. In the present embodiment, the liquid crystal module 23 is incorporated into the front panel 3 by fastening the printed circuit board 9 to the holding portion 3 a of the front panel 3 with the fastening screw 10.

  As described above, according to the present embodiment, since the front glass 5 is fixed to the panel holder 7 independently of the front panel 3, the liquid crystal panel 6 is installed at a stage before the printed circuit board 9 is incorporated into the front panel 3. The sealed state is realized. That is, at this stage, the intrusion of dust into the liquid crystal panel 6 side can be checked, and the intrusion of dust can be detected at an early stage on the factory production line. Thereby, the quality of the liquid crystal panel 6 can be assured accurately.

Moreover, after the product is assembled, a complicated operation of disassembling each part does not occur, and the number of man-hours required for the operator to remove dust can be reduced, and the burden on the operator can be reduced. Furthermore, since the dust removal operation can be performed independently of the front panel 3, the dust removal operation is simple and easy. That is, the dust removal operation does not become difficult unlike the conventional one in which the front panel 3 and the front glass 5 form an integral module. Furthermore, the surface panel 3 or the front glass 5 is not damaged during the work, and even if dust enters, parts replacement is not necessary, so that the manufacturing cost can be reduced.
Furthermore, since the cushion conventionally interposed between the front glass 5 and the panel holder 7 can be omitted, the number of parts can be reduced, thereby reducing the manufacturing cost.

  Further, in the present embodiment, since the front glass 5 is fixed to the panel holder 7 using the fixing screw 22, the workability of removing the front glass 5 is good, and this also makes it easy to remove dust. It can be carried out.

  FIG. 4 is a side cross-sectional view of a display unit showing a second embodiment of the present invention. In the second embodiment, a mounting bracket 24 is interposed between the front glass 5 and the panel holder 7, the front glass 5 is fixed to the mounting bracket 24, and the mounting bracket 24 is connected to the front panel 3 to print. The point which made the board | substrate 9 independent from the surface panel 3 differs greatly from 1st Embodiment. Hereinafter, with reference to FIG. 4, the same reference numerals are given to the same components and the like as in the first embodiment, and the second embodiment will be described. The liquid crystal display device 31 is also an in-vehicle audio device, and is not different from the liquid crystal display device 31 shown in FIG.

  As shown in FIG. 4, the point that the front glass 5 is fixed to the panel holder 7 independently of the front panel 3 is the same as in the first embodiment. Also in the present embodiment, a gap is formed between the front panel 3 and the front glass 5.

  The front glass 5 is formed along the inner periphery of the display opening 2 and occupies the space formed by the display opening 2. A mounting bracket 24 is interposed between the front glass 5 and the panel holder 7, and the front glass 5 is fixed to the mounting bracket 24 with a double-sided tape 25. A screw hole 24 a for fastening with the panel holder 7 is formed in the mounting bracket 24.

  The panel holder 7 holds the liquid crystal panel 6 and the mounting bracket 24 is fastened and fixed. That is, in this embodiment, the contact portion 7 a of the panel holder 7 contacts the mounting bracket 24, and the screw hole 7 b of the contact portion 7 a is formed corresponding to the screw hole 24 a of the mounting bracket 24. That is, the screw hole 7 b is screwed with the fixing screw 22 inserted through the screw hole 24 a of the mounting bracket 24.

  Further, the mounting bracket 24 is fixed to the holding portion 13 a formed to extend on the back surface side of the front panel 3 by the fastening screw 10. That is, the printed circuit board 9 is not fastened to the front panel 3 and is independent from the front panel 3.

A method for manufacturing the liquid crystal display device 31 configured as described above will be described.
First, the front glass 5 is fixed to the mounting bracket 24 using the double-sided tape 25. Then, in a state where the liquid crystal panel 6 and the panel holder 7 are incorporated in the printed board 9, the front glass 5 is fixed together with the mounting bracket 24 using the fixing screw 22. As a result, a liquid crystal module having the liquid crystal panel 6, the panel holder 7, the printed circuit board 9, and the front glass 5 is configured. At this time, the liquid crystal panel 6 is sealed by the front glass 5, the mounting bracket 24, the panel holder 7 and the printed board 9.

  Thereafter, the liquid crystal module is incorporated into the front panel 3 so that the front glass 5 is disposed in the display opening 2 of the front panel 3. In the present embodiment, the liquid crystal module is incorporated into the front panel 3 by fastening the mounting bracket 24 to the holding portion 13 a of the front panel 3 with the fastening screw 10.

  As described above, according to the present embodiment, since the front glass 5 is fixed to the panel holder 7 independently of the front panel 3, the liquid crystal panel 6 is installed at a stage before the printed circuit board 9 is incorporated into the front panel 3. The sealed state is realized. That is, at this stage, the intrusion of dust into the liquid crystal panel 6 side can be checked, and the intrusion of dust can be detected at an early stage on the factory production line. Thereby, the quality of the liquid crystal panel 6 can be assured accurately.

  Moreover, after the product is assembled, a complicated operation of disassembling each part does not occur, and the number of man-hours required for the operator to remove dust can be reduced, and the burden on the operator can be reduced. Furthermore, since the dust removal operation can be performed independently of the front panel 3, the dust removal operation is simple and easy. That is, the dust removal operation does not become difficult unlike the conventional one in which the front panel 3 and the front glass 5 form an integral module. Furthermore, the surface panel 3 or the front glass 5 is not damaged during the operation, and even if dust enters, parts replacement is not necessary, so that the manufacturing cost can be reduced.

  Further, in the present embodiment, the mounting bracket 24 to which the front glass 5 is fixed is fixed to the panel holder 7 using the fixing screw 22, so that the workability of removing the front glass 5 is good, and this also causes dust. Can be easily and easily removed.

  Furthermore, according to this embodiment, since the front glass 5 and the panel holder 7 are reinforced by the mounting bracket 24, the rigidity and strength against the external force applied to the front glass 5 can be improved. Further, static electricity charged on the front panel 3, the panel holder 7, etc. can be guided to the mounting bracket 24, which is extremely advantageous in practical use.

  Further, according to the present embodiment, since the mounting bracket 24 is connected to the front panel 3, the printed circuit board 9 can be made independent from the front panel 3, and a load is applied to the printed circuit board 9 due to distortion of the front panel 3 or the like. There is no. Furthermore, distortion and the like of the front panel 3 are suppressed by the mounting bracket 24, which contributes to improving the rigidity of the front panel 3.

  In the first and second embodiments, the present invention is applied to an in-vehicle audio device. However, for example, if a liquid crystal display unit is provided on a surface panel such as a mobile phone terminal, other Of course, the present invention can also be applied to liquid crystal display devices.

  Further, in each of the above embodiments, the front glass 5 or the mounting bracket 24 is fixed to the panel holder 7 by using the fixing screw 22, but the front glass 5 is independent of the front panel 3 and the panel holder 7 side. If it is fixed to, for example, you may make it fix using things other than screws, such as a clip and a fitting nail | claw. Furthermore, the shapes of the panel holder 7 and the front panel 3 are arbitrary, and it is needless to say that specific detailed structures and the like can be appropriately changed.

1 is an external perspective view of an in-vehicle audio device showing a first embodiment of the present invention. It is side surface sectional drawing of a display part. It is explanatory drawing at the time of incorporating a liquid crystal module in a surface panel. It is side surface sectional drawing of the display part which shows the 2nd Embodiment of this invention. It is side surface sectional drawing of the display part which shows a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal display device 2 Display opening part 3 Front panel 5 Front glass 6 Liquid crystal panel 7 Panel holder 9 Printed circuit board 22 Fixing screw 23 Liquid crystal module 24 Mounting bracket 31 Liquid crystal display device

Claims (4)

A glass member disposed in the display opening of the front panel; a liquid crystal panel disposed on the back side of the glass member; and a panel holder for holding the liquid crystal panel, wherein the display state of the liquid crystal panel is the glass member In liquid crystal display devices that are visible from the outside through
The glass member is
A surface portion formed along the inner periphery of the display opening;
A protrusion having a predetermined gap between the back side surface of the front panel and a larger opening than the display opening, and a screw hole for fastening with the panel holder;
Have
The glass member, by fastening fixed to the panel holder side using the inserted screws into the threaded hole, and wherein said glass member and independently of the said surface panel fixed to the panel holder side LCD device to be used. A glass member disposed in the display opening of the front panel, a liquid crystal panel disposed on the back side of the glass member, and a panel holder for holding the liquid crystal panel, wherein the display state of the liquid crystal panel is the glass member In liquid crystal display devices that are visible from the outside through
The glass member is
It has a surface portion formed along the inner periphery of the display opening, and is fixed to a mounting bracket that is fixed to a holding portion that is formed to extend on the back surface side of the front panel,
The mounting bracket is
A predetermined gap is formed between the back surface of the front panel and the display opening, and a screw hole for fastening with the panel holder is formed.
It said mounting bracket, by fastening fixed to the panel holder side using the inserted screws into the threaded hole, and wherein said glass member and independently of the said surface panel fixed to the panel holder side LCD device to be used. In manufacturing the liquid crystal display device according to claim 1,
After fixing the glass member on the panel holder side and configuring the liquid crystal panel, the panel holder and the liquid crystal module having the glass member,
A method of manufacturing a liquid crystal display device, wherein the liquid crystal module is incorporated into the front panel so that the glass member is disposed in a display opening of the front panel. In manufacturing the liquid crystal display device according to claim 2,
After fixing the glass member on the panel holder side and configuring the liquid crystal panel having the liquid crystal panel, the panel holder, the mounting bracket and the glass member,
A method of manufacturing a liquid crystal display device, wherein the liquid crystal module is incorporated into the front panel so that the glass member is disposed in a display opening of the front panel.

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