JP2005017415A - Display device with protective plate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dissipate heat by natural convection by attaching a protective plate to a display panel so that a non-contact part may be formed in the outer peripheral part. <P>SOLUTION: In a display device with a protective plate which has the display panel for information display, an enclosure having an opening formed so as to enable the display panel to be visually recognized, and a transparent protective plate covering the front surface of the display panel, an elastic member holding proper position parts except one or more parts of the peripheral edge of the protective plate is used to attach the protective plate to form a space in one or more parts between the display panel and the peripheral edge of the protective plate, and heat generated in the display panel is dissipated to the outside by natural convection through the space. The elastic member has recessed grooves for storing the end part of the protective plate and is held between the display panel and the enclosure. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display device having a display panel that generates heat, such as a liquid crystal television, a liquid crystal monitor, and a PDP.
[0002]
[Prior art]
Conventionally, the adhesion of foreign matter on the screen of a display device may affect the image quality in some cases, so as a countermeasure, a protective plate is often provided in front of the screen of the display device. For example, Patent Document 1 is disclosed as a conventional technique for providing a protective plate.
Patent Document 1 will be described with reference to FIGS. 6 is a cross-sectional view of the retractable liquid crystal display device, and FIG. 7 is an enlarged cross-sectional view of a portion A in FIG. In Patent Document 1, as shown in FIG. 6 and FIG. 7, a housing 21 having an opening for accommodating a display device on the front surface and a display plate 32 are provided, and the display plate 32 faces forward as described above. The display 30 is inserted and fixed in the housing through the opening, the transparent protective plate 33 covering the display plate 32, and the window 24a for viewing the display plate 32 through the protective plate 4, In an apparatus provided with a front panel 24 that covers the opening of the body, an attachment mechanism 34 that attaches the protective plate to the display so that the space SP between the display plate 32 and the protective plate 33 that covers the display plate 32 is sealed. , 35, and the protective plate 33 is attached to the display 30 via the attachment mechanisms 34, 35 before the display is assembled in the housing. As described above, the space SP between the display plate 32 and the protection plate 33 is sealed, so that dust adheres to the display plate 32 without performing the work of incorporating the display device 30 into the housing 21 in a clean room or the like. This is a proposal that the surface of the display panel 32 can be protected because the display panel 32 is not touched by a finger or the like.
[0003]
[Patent Document 1]
JP-A-8-62587
[Problems to be solved by the invention]
However, conventionally, as described above, there are provided attachment mechanisms 34 and 35 for attaching the protective plate to the display so that the space SP between the display plate 32 and the protective plate 33 covering the display plate 32 is sealed. Since the protection plate 33 is attached to the display 30 via the attachment mechanism before the device 30 is assembled in the housing, the heat generated by the display plate 32 cannot be released. As described above, when heat cannot be radiated due to complete sealing, the temperature of the display 30 itself rises, and depending on the material of the protective plate 33, the deformation may occur, and the reliability of the operation of the display 30 itself is reduced. Was also considered.
Therefore, an object of the present invention is to provide an attachment structure that can dissipate heat without completely sealing when attaching a protective plate to a display panel. It is another object of the present invention to provide a display device with a protective plate that can be easily attached / detached to / from the protective plate mounting mechanism, so that only the protective plate can be replaced even when the protective plate is damaged.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention attaches an appropriate outer periphery of the protective plate to the front surface of the display panel via an elastic member, and forms a gap between the display panel and the peripheral edge of the protective plate. In the display device with a protection plate having a display panel for displaying information, a housing having an opening formed so that the display panel can be visually recognized, and a transparent protection plate covering the front surface of the display panel, By attaching the protection plate using an elastic member that sandwiches an appropriate position excluding one or more positions on the periphery of the protection plate, one or more gaps are provided between the display panel and the periphery of the protection plate. It is formed.
According to the present invention, in the above invention, the elastic member has a concave groove that accommodates an end of the protective plate, and is sandwiched between the display panel and the casing.
According to the present invention, in the above invention, the display panel has an ear for mounting, the housing has a boss to which the ear is fixed, and the boss is inserted into the elastic member. It has a hole.
In the invention, the thickness of the elastic member on the housing side is a thickness that forms a gap between the protective plate and the housing.
In the invention, it is preferable that the elastic member has a first concave groove that accommodates an end portion of the protective plate and a second concave groove that accommodates an end portion of the display device main body. And
In the invention, the elastic member is mechanically fixed to the display device body on the back surface of the display device body.
In the invention, the elastic member is provided so as to form a gap between the display panel and the protective plate at two places in the horizontal direction, the vertical direction, or the diagonal direction of the display panel. It is characterized by.
The elastic member that sandwiches the protective plate is attached around the protective plate. However, the elastic member does not cover the entire periphery of the protective plate, but does not cover a certain portion. As a result, the protective plate and the display panel are not hermetically sealed and a gap is formed, and natural convection is generated by the gap and heat can be released. Further, the protective plate and the elastic member can be fitted together by forming a concave groove for attaching the protective plate to the elastic member. As a result, the protective plate can be easily attached and detached.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment in which the present invention is applied to a liquid crystal display device will be described with reference to FIGS.
1 to 3 show a first embodiment of the present invention, FIG. 1 shows a liquid crystal display device of the present invention, (a) is a cross-sectional view of the liquid crystal display device, and (b) is a liquid crystal display device. FIG. In FIG. 1, 1 is a front case of the liquid crystal display device, 2 is a back case of the display device, 3 is a liquid crystal panel, 4 is a protective plate, 5 is an elastic protective plate mounting frame that is an elastic member, 6 Is a boss provided on the housing 1, and 7 is a mounting screw.
[0007]
FIG. 2 is a front view showing only the protection plate 4 and the protection plate mounting frame 5 in FIG. FIG. 3 shows the protective plate mounting frame 5, (a) is a side view, and (b) is a front view. As shown in the figure, the protective plate 4 with the protective plate attachment frame 5 attached is sandwiched between the front case 1 and the liquid crystal panel 3, and the liquid crystal panel 3 and the protective plate attachment frame 5 are provided on the front case 1. Fasten with screws 7. As shown in FIG. 3, the protection plate mounting frame 5 is formed in a U-shape and uses an elastic member such as silicon rubber. A concave groove 8 for fitting the protective plate 4 is provided in the middle of the thickness direction of the protective plate mounting frame 5. The protection plate attachment frame 5 is attached to the left and right of the protection plate 4 as shown in FIG. The protection plate mounting frame 5 is not attached and fixed by an adhesive or the like but is fitted so that the protection plate 4 can be easily removed.
[0008]
Further, as can be seen from FIG. 2, the entire periphery of the protective plate 4 is not covered. In the illustrated example, the intermediate portions of the upper side and the lower side of the protection plate 4 are not covered. As a result, when the front housing 1, the protective plate 4, and the liquid crystal panel 3 are assembled, the liquid crystal panel 3 and the protective plate 4 are not sealed, but gaps are formed in the upper and lower sides, and the liquid crystal is generated by natural convection generated therebetween. The generated heat of the panel 3 can be released. In FIG. 2, the protective plate mounting frame 5 is arranged on the left and right sides of the protective plate 4 so as to generate natural convection from the lower gap to the upper gap. It may be arranged vertically or diagonally according to the above. Further, as shown in FIG. 3, a hole in which the boss 7 is fitted to the protective plate mounting frame 5 so that the protective plate mounting frame 5 can be fastened to the boss 6 of the liquid crystal panel 3 and the front housing 1 with screws 7. 9 is provided.
[0009]
Next, a method for attaching the liquid crystal panel 3 to the front housing 1 will be described. The protective plate mounting frames 5 are fitted on the left and right sides of the protective plate 4, and in this state, the holes 9 of the protective plate mounting frame 5 are fitted to the bosses 6 of the front housing 1. Next, screw fixing holes formed in the ears at both ends of the liquid crystal panel 3 are aligned with the positions of the bosses 6 and tightened with screws 7. At this time, the front casing 1, the protection plate 4, and the liquid crystal panel 3 are fixed through the protection plate attachment frame 5 without being in contact with each other. By fixing in this way, the protective plate 4 protects the surface of the liquid crystal panel 3 from adhesion of foreign substances, and a heat radiation path is formed in the upper and lower portions of the liquid crystal panel 3, and a speaker that generates vibration in the front housing 1 is also provided. When installed, the vibration is prevented from being transmitted to the protection plate 4 and the liquid crystal panel 3.
[0010]
Next, a second embodiment of the present invention will be described with reference to FIGS. 4 is a front view of the liquid crystal display device, and FIG. 5 is a cross-sectional view of the liquid crystal display device in a top view. In the figure, 11 is a front case of the liquid crystal display device, 12 is a rear case of the display device, 13 is a liquid crystal panel, 14 is a protective plate, 15 is an elastic protective plate mounting frame, and 16 is an elastic member. A boss provided on the housing 11, 17 is a screw for fastening, and 18 is a boss provided on the rear housing 12. As shown in FIG. 5, the protective plate mounting frame 15 has a first concave groove that fits with the liquid crystal display device and a second concave groove that fits with the protective plate 14. For the positioning of the protective plate 14, a process is provided such that a protrusion is provided at the lower end of the second concave groove, or the lower end of the second concave groove is closed.
[0011]
Next, a method for attaching the protective plate attachment frame 15 will be described. After the liquid crystal panel 13 or an internal chassis (not shown) is attached to the front casing 11, the boss 16 of the front casing 11 and the boss 18 of the rear casing 12 are brought into contact with each other. In the state where the front housing 11 and the rear housing 12 are combined, the first concave groove of the protection plate mounting frame 15 is fitted, and the screw 17 is used to connect the front housing 11 via the boss 18 of the rear housing 12. The space between the bosses 16 is fixed. After fixing the protective plate mounting frame 15, the protective plate 14 is inserted into the second concave groove from the top surface direction of the display device. Thus, by fixing the liquid crystal panel 13 and the protective plate 14 via the front case 11 and the protective plate mounting frame 15, the surface of the liquid crystal panel 13 is protected from adhesion of foreign matters such as fingerprints, and The heat dissipation path of the liquid crystal panel 13 can be secured at this portion. Furthermore, when the foreign matter adheres to the protective plate 14 violently or is damaged, the protective plate 14 can be removed for easy cleaning and replacement. In the above-described embodiment, a display device using a liquid crystal panel has been described. However, the present invention can also be applied to a display device using a PDP.
[0012]
【The invention's effect】
As described above, in the present invention, by providing a gap between the protective plate and the display panel, natural convection is generated through the gap and the heat dissipation efficiency of the display panel can be improved. In addition, by protecting the protective plate, display panel, and front case through elastic members and keeping them in a non-contact manner, the vibration is protected when a speaker that generates vibration is installed in the front case. It is also possible to prevent transmission to the board and the display panel. In addition, by forming a concave groove to attach the protective plate to the elastic member, the protective plate can be removed from the concave groove for easy cleaning and replacement when the protective plate is heavily adhered or damaged. It becomes possible.
[Brief description of the drawings]
1A and 1B are a front view and a cross-sectional view of a liquid crystal display device according to a first embodiment of the present invention.
FIG. 2 is a front view of a protection plate and a protection plate mounting frame according to the first embodiment of the present invention.
FIGS. 3A and 3B are a front view and a cross-sectional view of the protective plate mounting frame according to the first embodiment of the present invention. FIGS.
FIG. 4 is a front view of a liquid crystal display device according to a second embodiment of the present invention.
FIG. 5 is a cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention.
FIG. 6 is a cross-sectional view of a conventional liquid crystal display device.
FIG. 7 is an enlarged cross-sectional view of a liquid crystal display device in the prior art.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front housing | casing 2 Back housing | casing 3 Liquid crystal panel 4 Protection board 5 Protection board attachment frame 6 Boss 7 Screw 8 Recessed groove 9 Attachment hole 11 Front case 12 Rear case 13 Liquid crystal panel 14 Protection board 15 Protection board attachment frame 16 Boss 17 Screw 18 Boss

Claims (8)

A display device with a protective plate, wherein an appropriate portion of the outer periphery of the protective plate is attached to the front surface of the display panel through an elastic member, and a gap is formed between the display panel and a peripheral portion of the protective plate. In a display device with a protective plate having a display panel for displaying information, a housing having an opening formed so that the display panel can be visually recognized, and a transparent protective plate covering the front surface of the display panel,
One or more gaps are formed between the display panel and the peripheral portion of the protective plate by attaching the protective plate using an elastic member that holds an appropriate position excluding one or more peripheral portions of the protective plate. A display device with a protective plate, characterized in that is formed. The protective plate according to claim 1, wherein the elastic member has a concave groove that accommodates an end portion of the protective plate, and is sandwiched between the display panel and the housing. Display device. The display panel has an ear for mounting, the housing has a boss to which the ear is fixed, and the elastic member has a hole for inserting the boss. Item 4. A display device with a protective plate according to Item 2 or Item 3. The thickness of the said housing | casing side of the said elastic member is a thickness which forms a space | gap between the said protective plate and the said housing | casing, The protective plate attached in any one of Claim 2 thru | or 4 Display device. The said elastic member has the 1st ditch | groove which accommodates the edge part of the said protective plate, and the 2nd ditch | groove which accommodates the edge part of a display apparatus main body, The Claim 1 thru | or 5 characterized by the above-mentioned. A display device with a protective plate according to 1. The display device with a protective plate according to claim 1, wherein the elastic member is mechanically fixed to the display device main body on a back surface of the display device main body. The said elastic member is provided so that a space | gap may be formed between the said display panel and the said protective plate in two places of the left-right direction or the up-down direction, or a diagonal direction of the said display panel. Item 8. A display device with a protective plate according to any one of Items 7 to 9.

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