JP3001011U - Liquid crystal display mounting structure - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a mounting structure of a liquid crystal display device, which enables mounting without mounting screws when mounting the liquid crystal display device and the digitizer, and prevents the structure from being complicated by wiring. With the goal. [Structure] A stopper 14 is provided on the outer peripheral portion of the panel of the liquid crystal display device.
Is provided, a hook 16 is provided on the inner peripheral portion of the case 12 to which the panel 10 is mounted, and the stopper 1 is provided.
A holder 18 made of a leaf spring, one end of which covers the surface of the stopper 14 and the other end of which is engaged with the hook, is inserted between the hook 4 and the hook 16.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a mounting structure for a liquid crystal display device.

[0002]

[Prior art]

 As a conventional mounting structure of a liquid crystal display device, the liquid crystal display device is mounted on a lower case, and a mounting portion provided on an outer peripheral portion of the liquid crystal display device is fastened to a boss portion of the lower case using a set screw. For example, as shown in FIG. 10, reference numeral 11 denotes an upper case, and a stopper portion 14 ′ provided on the outer peripheral portion of the liquid crystal display device 10 is provided on the boss portion 13 of the lower case 12 and is fastened using a set screw 15. Has been done. Further, in the structure shown in FIG. 11, the insert nut 17 is inserted and attached to the boss portion 13, and the stop portion 14 ′ is fastened by using the set screw 15 screwed into the insert nut 17. As shown in FIGS. 10 and 11, as the liquid crystal display device 10 is made thinner, the height of the boss portion 13 and the height of the insert nut 17 cannot be ensured to the required dimensions, and it becomes difficult to fasten a sufficient screw. ing.

Further, a lead wire which is fastened together with a lug terminal (not shown) is connected to the stopper portion 14 ′ so as to be grounded. further. The liquid crystal display device 10 is adhered together with a digitizer using double-sided tape or the like, and neither of these connection methods and the adhering method can cope with the slimming down of the liquid crystal display device, and the connection is made by using lead wires. This complicates the configuration, makes it difficult to shorten the time for assembly work, and makes maintenance work difficult.Furthermore, since the digitizer is bonded to the liquid crystal display device, peeling does not occur. This was not easy and could make the digitizer replacement work difficult.

Further, a pressure-sensitive tablet is provided on the front surface of the panel of the liquid crystal display device of the pen-input personal computer, but since the tablet portion is not provided with a shield measure against electromagnetic waves, electromagnetic wave leakage may occur, In addition, since it is not an airtight structure, if a liquid substance adheres to it, it may penetrate into the interior and cause a short circuit, or dust may easily enter. Further, in a backlight-illuminated liquid crystal display device, a transparent light guide plate is installed on the back surface of the liquid crystal display device, and a light source such as a fluorescent tube is provided on one or both sides of the light guide plate. Then, the liquid crystal display device is irradiated. However, since the light sources are provided on both sides of the light guide plate, not only the power consumption is increased as compared with the case of one side, but there is a fear that the irradiation over the entire surface of the liquid crystal display device cannot be made uniform.

[0005]

[Problems to be solved by the device]

 The present invention has been made to solve the problems of the prior art.When mounting a liquid crystal display device and a digitizer, it is possible to mount the liquid crystal display device by omitting screw fastening, and use a lead wire. It is possible to prevent complication of the configuration by electrically conducting without using it, and to facilitate the replacement of the digitizer, to prevent the shield of the pressure-sensitive tablet and to prevent the intrusion of liquid substances and dust, and the backlight. It is an object of the present invention to provide an excellent liquid crystal display device mounting structure capable of reducing the power consumption of the device and uniformizing the irradiation over the entire surface.

[0006]

[Means for Solving the Problems]

 In order to achieve such an object, in the liquid crystal display device mounting structure of the present invention, a stop portion is provided on an outer peripheral portion of a panel of the liquid crystal display device, and a hook is provided on an inner peripheral portion of a case to which the panel is mounted. At the same time, a holder made of a leaf spring, one end of which covers the surface of the stopper and the other end of which is engaged with the hook, is inserted between the stopper and the hook. Is. The other end of the holder is engaged with the hook, and a part of the holder in the width direction is an extended terminal piece. This terminal piece is a ground terminal of the printed circuit board arranged in the case. It is characterized in that it is configured to be pressed against. Further, one end of the holder is a bent piece having a substantially L shape. In addition, the ground pattern part is exposed over almost the entire circumference of the base substrate of the pressure-sensitive tablet disposed in front of the panel of the liquid crystal display device, and the metal plating part formed on the inner surface of the case and the above-mentioned ground pattern part. It is characterized in that a packing made of a conductive rubber is sandwiched between and. Further, a transparent light guide plate is sandwiched between the lower surface of the panel of the liquid crystal display device and the reflection plate, a light source is provided on one side of the light guide plate, and a plastic fiber is provided along the lower surface of the light guide plate. A part of the incident light from the light source is directly transmitted through the light guide plate and is irradiated to the panel of the liquid crystal display device through the plastic fiber and the light guide plate.

[0007]

[Action]

 With this configuration, the liquid crystal display device can be securely attached to the case by the holder under the elastic force, and can be detachably attached. Since the holder is formed as a ground terminal, it is connected to the ground terminal on the printed circuit board without using a lead wire. The substantially L-shaped bent piece of the holder allows the liquid crystal display device and the digitizer to be mechanically and securely fixed, and is removable, so that the adhesive method can be avoided.

Electromagnetic wave leakage due to the packing made of conductive rubber sandwiched between the ground pattern portion of the pressure-sensitive tablet provided on the liquid crystal display device such as a pen input personal computer and the metal plating portion of the case Can be effectively prevented, short-circuit accidents due to intrusion of liquid substances, and intrusion of dust can be prevented. In addition, since a part of the incident light from the light source provided on one side of the liquid crystal display device is directly transmitted through the light guide plate, and the remaining part is transmitted through the plastic fiber and reaches the inside of the light guide plate again, Irradiation can be made uniform over the entire surface of the liquid crystal display device, and the display quality can be improved.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an overall configuration showing an embodiment of the present invention, FIG. 2 is a sectional view of a main part taken along AA in FIG. 1, and FIG. 3 is a sectional view of a main part taken along BB in FIG. 4 is a perspective view showing an essential part of another embodiment of the present invention, FIG. 5 is a sectional view of an essential part of FIG. 4, FIG. 6 is a perspective view showing another embodiment of the present invention, and FIG. 8 is a partial sectional perspective view showing an embodiment of the present invention, FIG. 8 is a sectional view of a main portion of FIG. 7, and FIG. 9 is a sectional view of a backlight portion showing another embodiment of the present invention. 1 to 3, the liquid crystal display device 10 has, on the outer periphery thereof, stoppers 14 formed of short pieces at, for example, four locations, and the inner periphery of the inner surface of the lower case 12 in which the liquid crystal display device 10 is mounted. The hooks 16 are provided at four positions, and the liquid crystal display device 10 is configured to be fixed on the lower case 12 by the stoppers 14 and the hooks 16.

The hook 16 is arranged so as to surround each of the stoppers 14 by a hook member 16a in the length direction and hook members 16b, 16b in the width direction, and protrudes inside the upper part of the hook member 16a. The portion 16A is formed. A holder 18 is inserted between the stopper portion 14 and the hook 16, and the holder 18 is made of a leaf spring or the like and is molded so that one end of the holder 18 is on the surface of the stopper portion 14. That is, it is bent so as to cover the upper surface and the lower surface, and the other end is bent in a U shape so that the end is engaged with the protruding portion 16A of the hook 16 along the hook member 16a. ing. In this way, the liquid crystal display device 10 is surely attached to the lower case 12 under the elastic force of the holder 18. When the liquid crystal display device 10 is detached from the lower case 12, it can be easily detached by releasing the engagement with the hook 16 by pressing the holder 18.

4 and 5, parts different from the embodiment shown in FIGS. 1 to 3 will be described. Reference numeral 20 denotes a printed circuit board arranged in the lower case 12. One end of the holder 18 'is bent so as to cover the surface of the stopper portion 14, and the other end is bent in a U shape to form a U-shaped portion 18a, which contacts the hook member 16a. The end portions are engaged with the protruding portion 16A of the hook 16. The other end is extended in the width direction and further bent to form a terminal piece 18b, which comes into contact with the printed circuit board 20 and is electrically connected to the ground.

In FIG. 6, parts different from the embodiment shown in FIGS. 1 to 5 will be described. Reference numeral 22 denotes a digitizer provided on the upper surface of the liquid crystal display device 10. One end of the holder 18 ″ is bent so as to cover the surface of the stopper portion 14, and the other end thereof is bent into a U shape and abuts along the hook member 16a. Then, one end is extended in the height direction and further bent to form an L-shaped bent piece 18c, and the liquid crystal display device 10 and the digitizer 22 are both held in the holder 18 ″. It is configured so that it can be mechanically fixed by.

7 and 8 are views showing another embodiment of the present invention. Reference numeral 11 denotes an upper case made of plastic resin, and a pressure sensitive tablet 24 is arranged on the front surface of the liquid crystal display device 10 via a base substrate 26 so as to form a pen input personal computer. The base substrate 26 is in the shape of a rectangular half surface, and the ground pattern portion 28 is exposed at the outer peripheral edge portion over almost the entire circumference with a required width dimension. A recess is formed on the inner surface of the upper case 11, and a metal-plated portion 30 formed by metal plating is formed on the surface of the recess. A packing 32 made of conductive rubber and having a substantially rectangular cross section is hermetically sandwiched between the metal plating part 30 and the ground pattern part 28 in the recess over the entire circumference. By electrically connecting the ground pattern portion 28 and the metal plating portion 30 with the packing 32 in this manner, the leakage of electromagnetic waves generated near the liquid crystal display device 10 can be reduced equally. Further, the packing 32 is formed in a seamless structure and has airtightness, so that it is possible to prevent liquid substances, dusts, and the like from entering the inside, and effectively prevent a short-circuit accident or the like.

In FIG. 9, a transparent light guide plate 38 made of, for example, a flat acrylic resin plate is sandwiched between the lower surface of the liquid crystal display device 10 and the reflection plate 34. One side of the light guide plate 38 is an orthogonal surface 38a, a light source 40 is provided adjacent to the orthogonal surface 38, and the other side is an end surface 38b made of a bent surface having an inclined surface. It is in close contact with the reflector 36.

A fluorescent tube or the like is suitable as the light source 40. A plurality of plastic fibers 42 having a length substantially equal to the width of the light guide plate 38 are arranged along the lower surface of the light guide plate 38, and a part of the incident light from the light source 40 is part of the light guide plate 38. The light is directly transmitted through the inside as shown by an arrow A and is irradiated to the liquid crystal display device 10 along with the reflection of the reflection plate 34, while the rest of the incident light passes through the inside of the plastic fiber 42 and is reflected by the bending reflection portion 36. Then, the liquid crystal display device 10 is irradiated again from the end face 38b to the inside of the light guide plate 38 and reflected by the reflection plate 34 as shown by an arrow B, and is irradiated from the light source 40 provided only on one side of the liquid crystal display device 10. All of the incident light is applied to the liquid crystal display device 10 and the irradiation can be made uniform over the entire surface, so that the display quality can be improved.

As described above, in the liquid crystal display device mounting structure of the present invention, the panel outer periphery of the liquid crystal display device is provided with the stopper, and the panel is mounted on the inner periphery of the case. The holder is composed of a leaf spring whose one end covers the surface of the stopper and the other end engages with the hook between the stopper and the hook. It is a feature. The other end of the holder is engaged with the hook, and a part of the holder in the width direction is an extended terminal piece. This terminal piece is a ground terminal of the printed circuit board arranged in the case. It is characterized in that it is configured to be pressed against. Further, one end of the holder is a bent piece having a substantially L shape. In addition, the ground pattern part is exposed over almost the entire circumference of the base substrate of the pressure-sensitive tablet disposed in front of the panel of the liquid crystal display device, and the metal plating part formed on the inner surface of the case and the above-mentioned ground pattern part. It is characterized in that a packing made of a conductive rubber is sandwiched between and. Further, a transparent light guide plate is sandwiched between the lower surface of the panel of the liquid crystal display device and the reflection plate, a light source is provided on one side of the light guide plate, and a plastic fiber is provided along the lower surface of the light guide plate. A part of the incident light from the light source is directly transmitted through the light guide plate and is irradiated to the panel of the liquid crystal display device through the plastic fiber and the light guide plate.

[0017]

[Effect of device]

 As described above, according to the present invention, the liquid crystal display device can be made thin, and when mounting the liquid crystal display device and the digitizer, screw fastening can be omitted, and the liquid crystal display device can be attached and detached. It can be made simple. Also, by using a holder, electrical connection can be simplified, and assembly time can be shortened and maintenance work and digitizer replacement can be facilitated. Electromagnetic wave leakage of the pressure-sensitive tablet, prevention of internal short accidents, dust prevention, etc. are effectively performed, power consumption of the backlight is reduced, irradiation of the entire liquid crystal display device can be made uniform, and display quality is improved. It has a great effect such as being able to.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall structure of a mounting structure of a liquid crystal display device showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part taken along the line AA of FIG.

FIG. 3 is a cross-sectional view of main parts taken along line BB of FIG.

FIG. 4 is a perspective view showing a main part of another embodiment of the present invention.

5 is a cross-sectional view of the main parts of FIG.

FIG. 6 is a perspective view showing another embodiment of the present invention.

FIG. 7 is a partial sectional perspective view showing another embodiment of the present invention.

8 is a cross-sectional view of the main parts of FIG.

FIG. 9 is a cross-sectional view showing another embodiment of the present invention.

FIG. 10 is a cross-sectional view of a main part of a conventional liquid crystal display device mounting structure.

11 is a cross-sectional view of a main part showing a modified example of FIG.

[Explanation of symbols]

 10 Liquid Crystal Display 12 Lower Case (Case) 14 Hook 18 Hook 18 Holder 20 Printed Circuit Board 22 Digitizer 24 Pressure Sensitive Tablet 26 Base Base 28 Ground Pattern 30 Metal Plating 32 Packing 34 Reflector 36 Bending Reflector 38 Light Guide 40 Light source 42 Plastic fiber

Claims (5)

[Scope of utility model registration request] 1. A liquid crystal display panel is provided with a stopper on the outer periphery thereof, a hook is provided on the inner periphery of a case to which the panel is mounted, and one end is provided between the stopper and the hook. A mounting structure for a liquid crystal display device, wherein a holder made of a leaf spring that covers the surface of the stopper portion and has the other end engaged with a hook is inserted. 2. The other end of the holder is engaged with the hook and a part of the holder in the width direction is an extended terminal piece, and the terminal piece is a printed circuit board arranged in the case. The mounting structure for a liquid crystal display device according to claim 1, wherein the mounting structure is configured to be in pressure contact with the ground terminal. 3. The mounting structure for a liquid crystal display device according to claim 1, wherein one end of the holder is a substantially L-shaped bent piece. 4. A ground pattern part is exposed over substantially the entire circumference of a base base of a pressure-sensitive tablet disposed on the front surface of a panel of a liquid crystal display device, and a metal plating part formed on the inner surface of the case and the ground. A mounting structure for a liquid crystal display device, characterized in that a packing made of conductive rubber is sandwiched between the pattern part and the pattern part. 5. A transparent light guide plate is sandwiched between a lower surface of a panel of a liquid crystal display device and a reflection plate, a light source is provided on one side of the light guide plate, and the light guide plate is provided along the lower surface of the light guide plate. Mounting of a liquid crystal display device, characterized in that a plastic fiber is provided, and a part of the incident light from the light source is directly transmitted through the light guide plate and is irradiated to the panel of the liquid crystal display device through the plastic fiber and the light guide plate. Construction.