JP2014215452A - Liquid crystal module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to ensure heat radiation performance without increasing the number of components.SOLUTION: The invention relates to a liquid crystal module 1 configured so that a liquid crystal panel 3, a light guide plate 4 provided on a back surface of this liquid crystal panel 3, and an LED bar 8 provided on one side of this light guide plate 4 are accommodated in a lower case 11, an upper frame 12 is covered on this lower case 11, and the lower case 11 is fixed to the upper case 12 in a fixing portion 13. The fixing portion 13 includes: a rectangular attachment hole 21 formed in a side surface of the lower case 11; and pressure deformation band portion 22 formed in a side surface of the upper case 11 and depressed and engageable with the rectangular attachment hole 21. At least one side of this pressure deformation band portion 22 is a concave side having two inclined side portions 23a and 23b narrower as being closer to a longitudinal center or two inclined side portions 24a and 24b.

Description

  The present invention relates to a liquid crystal module.

  In recent years, devices (display devices) including a display for display have been used in various fields. In such a device, a liquid crystal module configured in advance is mounted as it is, so that a display device including a display for display can be easily obtained.

  The liquid crystal module described above includes, for example, a light guide that is disposed on the back side of the liquid crystal panel and guides light to the liquid crystal panel, and a light source substrate that is disposed on one side of the light guide. There are some that include a backlight module that is housed in a chassis and the frame is housed in a chassis and fixed by a fixing portion (see, for example, Patent Document 1).

JP2011-253769A

  However, the backlight module described in Patent Document 1 has a structure in which a heat radiating plate is attached to the lower side of the chassis in order to dissipate heat generated by the light source substrate, which increases the number of components. There were problems such as.

  Therefore, an object of the present invention is to solve the above-described problem of heat dissipation.

In order to solve the above problems, the present invention provides:
A liquid crystal panel having an optical sheet on the front surface;
A light guide plate disposed on the back side of the liquid crystal panel to guide light to the liquid crystal panel;
An LED bar disposed on one side of the light guide plate and arranged on a wiring board with a plurality of LEDs arranged in a row, and housed in the lower case,
A liquid crystal module in which the lower case is covered with an upper frame, and the lower case and the upper frame are fixed by a fixing part,
The fixing part is
A rectangular mounting hole formed on a side surface of the lower case;
Formed on the side surface of the upper frame, and has a pressing deformation band part that can be immersed and locked into the rectangular mounting hole,
At least one side of the pressing deformation band portion is formed in a concave shape having two inclined side portions whose width dimension becomes narrower toward the center in the longitudinal direction.

According to the present invention, the following effects can be obtained by the above-described configuration.
That is, the lower case and the upper frame can be fixed by immersing and locking the pressing deformation band portion inside the mounting hole. At this time, at least one side of the pressing deformation band portion is a concave shape having two inclined side portions, so that two inclined side portions of the pressing deformation band portion are two points with respect to one side of the mounting hole. Since the contact pressure between the two points increases at the above two points, the lower case and the upper frame can be fixed without backlash.
In addition, a required size for communicating between the inner and outer sides of the lower case and the upper frame between the mounting hole and the pressing deformation band portion by two concave inclined side portions formed on at least one side of the pressing deformation band portion. The communication hole portion is formed, and the communication hole portion becomes a heat radiating hole or a breathing hole. Therefore, heat dissipation and moisture release can be ensured at the same time without increasing the number of parts.

1 is an overall perspective view of a liquid crystal module according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of FIG. 1. It is a partial longitudinal cross-sectional view of FIG. FIG. 2 is an enlarged side view of a fixing unit in FIG. 1.

Hereinafter, the present embodiment and examples embodying the present embodiment will be described in detail with reference to the drawings.
1 to 4 show examples of this embodiment and modifications thereof.

<Configuration> The configuration will be described below.
For example, some vehicles such as automobiles are provided with a display for display in the front part of the vehicle interior. And the liquid crystal module 1 as shown in the whole perspective view of FIG. 1 is also used for this display for display. The liquid crystal module 1 is disposed on the back side of a liquid crystal panel 3 having an optical sheet 2 on the front surface, as shown in, for example, an exploded perspective view of FIG. 2 and a partially enlarged sectional view of FIG. A light guide plate 4 that guides light to the liquid crystal panel 3, and an LED bar 8 that is arranged on one side of the light guide plate 4 and that is mounted on the wiring board 7 in a row, is arranged in a lower case. 11, the lower case 11 is covered with an upper frame 12, and the lower case 11 and the upper frame 12 are fixed by a fixing portion 13.

Here, a supplementary explanation of the above will be given.
The above-mentioned “liquid crystal module 1” is literally a package component obtained by combining components such as the liquid crystal panel 3, the light guide plate 4, and the LED bar 8 in advance to form a module. It can be made to be a display device provided with

  The above-mentioned “optical sheet 2” is literally a transparent resin sheet having optical characteristics. There are various optical sheets 2 such as a polarizing film, a quarter-wave plate, a decorative film, a low reflection film, and a composite film combining these. Such an optical sheet 2 is attached to the display surface (front surface) of the liquid crystal panel 3 with a special adhesive or the like, for example.

  The above-mentioned “liquid crystal panel 3” is literally a thin display panel that can display an image using liquid crystal. In this case, the liquid crystal panel 3 has a rectangular shape having a required aspect ratio.

  The above-mentioned “light guide plate 4” is literally a plate-like body for guiding the light for illumination to the back side of the liquid crystal panel 3, and is constituted by a transparent resin panel or the like. The light guide plate 4 is substantially the same size as the liquid crystal panel 3 or has a rectangular shape slightly larger than that. On the back side of the light guide plate 4, a reflection sheet 15 or the like is installed as necessary.

  The above-mentioned “one side” is literally one side of the four sides of the rectangular light guide plate 4.

  The “LED 6” described above is a light source (point light source) that generates light for illuminating the liquid crystal panel 3 from the back side. A required clearance is formed between the irradiation surface of the LED 6 and one side of the light guide plate 4 as necessary.

  In this case, the above-mentioned “wiring board 7” is a flexible printed board constituted by an extremely thin flexible insulating film.

  The “LED bar 8” described above attaches a plurality of LEDs 6 to the flexible wiring board 7 as described above at a constant interval, and forms electric wires for supplying power to each LED 6. A band-shaped light emitter (band-shaped light emitter) is used.

  The above-mentioned “lower case 11” is literally a case located on the lower side. The lower case 11 is a shallow rectangular container having a rectangular bottom surface and four side surfaces erected upward from the four sides of the bottom surface. The lower case 11 is made of metal. For mounting the liquid crystal module 1, the light guide plate 4, and the LED bar 8 to the lower case 11, a frame-shaped mounting member 16 or the like is used as necessary.

  The frame-shaped mounting member 16 includes at least a mounting portion 16a for the lower case 11, a mounting portion 16b for the liquid crystal module 1, a mounting portion 16c for the light guide plate 4, a mounting portion 16d for the LED bar 8, and the like. The The mounting portion 16d has a mounting surface for the LED bar 8, an insertion hole for the LED 6, and the like. The LED bar 8 is attached to the mounting portion 16d with a special adhesive or the like, for example. Note that the attachment of the liquid crystal module 1, the light guide plate 4, and the LED bar 8 to the lower case 11 is not limited to the one using the frame-shaped attachment member 16 described above.

  The above-described “upper frame 12” is literally a frame-shaped lid member positioned on the uppermost side of the liquid crystal module 1. The upper frame 12 has a rectangular frame-shaped upper surface having an opening 12a that the liquid crystal panel 3 faces, and four side surfaces that hang downward from the four sides of the upper surface. The upper frame 12 is substantially the same as the lower case 11 or slightly larger than the lower case 11 so that the upper frame 12 can be attached to the lower case 11 from above with almost no gap. The upper frame 12 is made of metal.

  The above-mentioned “fixing part 13” is literally a part or structure for fixing the lower case 11 and the upper frame 12. The fixing unit 13 will be described later.

  In contrast to the above-described configuration, the present embodiment has the following configuration.

(Configuration 1)
The fixing part 13 described above is
A rectangular mounting hole 21 formed on the side surface of the lower case 11;
It is formed on a side surface of the upper frame 12 and has a press deformation band portion 22 that can be inserted and locked into the rectangular attachment hole 21.
Then, as shown in the partially enlarged view of FIG. 4, at least one side of the pressure deformation band portion 22 has two inclined side portions 23a, 23b whose width dimension becomes narrower as it goes to the center in the longitudinal direction, or two inclined sides. A concave shape having side portions 24a and 24b is used.

(Supplementary explanation 1)
Here, the above-described “mounting hole 21” is literally a hole for mounting, and in this case, has a horizontally long rectangular shape extending along the side surface of the lower case 11. The attachment hole 21 has a size that allows a part of the pressing deformation band portion 22 to be immersed.

  The above-mentioned “press deformation band portion 22” is literally a band-shaped portion that is deformed in the out-of-plane direction by pressing. The pressing deformation band portion 22 is formed between two parallel slits, for example. The pressing deformation band portion 22 is deformed into a bridge shape by being pushed inward of the attachment hole 21 and is locked to the attachment hole 21.

  The above-mentioned “one side” is one side of the press deformation band portion 22. More specifically, it is the upper side (upper side portion) or the lower side (lower side portion) of the pressing deformation band portion 22 in the drawing. In this case, there are two upper and lower sides.

The above-mentioned “longitudinal direction” is an extending direction of the press deformation band portion 22.
The above-mentioned “center” refers to the central portion in the longitudinal direction of the pressing deformation band portion 22 or its periphery.
The above-mentioned “width dimension” is a dimension in the width direction (vertical direction in the drawing) of the press deformation band portion 22.

  The above-described “inclined side portions 23 a and 23 b or inclined side portions 24 a and 24 b” are inclined portions formed on the sides of the press deformation band portion 22. In this case, the upper side portion of the pressing deformation band portion 22 is formed in a V shape by the two inclined side portions 23a and 23b. Moreover, the lower side part of the press deformation | transformation belt | band | zone part 22 is made into reverse V shape by the two inclined side parts 24a and 24b.

  The above-mentioned “concave shape” is a shape in which one side of the press deformation band portion 22 is recessed in a concave shape. In this case, it becomes the above-mentioned V-shaped dent. Then, in order to make the above-described two pairs of inclined side portions 23a and 23b and inclined side portions 24a and 24b, two triangular shapes (particularly flat of the same size) whose apexes face each other with respect to the side surface of the upper frame 12 are formed. (A isosceles triangle shape) hole is formed.

(Configuration 2)
As shown in FIG. 3, the rectangular attachment hole 21 constituting the fixing portion 13 is formed on the side of the lower case 11 where the LED bar 8 is provided, on the side opposite to the irradiation surface of the LED 6. It is made to provide so that the board | substrate 7 may face.

(Supplementary explanation 2)
Here, the above-mentioned “surface on the side opposite to the irradiation surface of the LED 6 of the wiring substrate 7” is the back surface or the outer surface of the wiring substrate 7.

(Configuration 3)
Further, the mounting hole 21 is provided at a position overlapping the LED 6.

(Supplementary explanation 3)
Here, the “overlapping position” described above is a position where the LED 6 in the LED bar 8 is provided. However, the mounting holes 21 do not have to correspond to the LEDs 6 on a one-to-one basis, and a plurality of LEDs 6 may overlap the single mounting hole 21. Further, for example, some of the LEDs 6 may be present at a position without the mounting hole 21.

<Operation> The operation of this embodiment will be described below.
The liquid crystal panel 3 (including the optical sheet 2), the light guide plate 4 (including the reflection sheet 15), and the LED bar 8 are accommodated in the lower case 11 via the frame-shaped mounting member 16, and the lower case 11 The liquid crystal module 1 is assembled by covering the upper frame 12 and fixing the lower case 11 and the upper frame 12 by the fixing portion 13.

  At this time, the lower case 11 and the upper frame 12 are locked and fixed by deforming and immersing the pressing deformation belt portion 22 into the rectangular mounting hole 21 (pushing in while bending). The fixing portion 13 may be provided at least on one side of the lower case 11 and the upper frame 12, but may be provided on the other side. Alternatively, for other sides, a stopper, a positioning part, or the like may be provided as appropriate instead of the above-described fixing part 13.

  And by mounting this liquid crystal module 1 on a device as it is, a display device having a display for display can be obtained.

  In the liquid crystal module 1, the back side of the liquid crystal panel 3 can be illuminated (backlight illumination) by causing light from the LED 6 to enter one side of the light guide plate 4.

<Effect> According to this embodiment, the following effects can be obtained.
(Operation effect 1)
The lower case 11 and the upper frame 12 can be fixed by immersing and locking the pressing deformation belt portion 22 into the mounting hole 21. At this time, at least one side of the pressing deformation band portion 22 is formed in a concave shape having two inclined side portions 23a and 23b or two inclined side portions 24a and 24b. Since the two inclined sides 23a and 23b or the two inclined sides 24a and 24b of the pressing deformation band portion 22 hit at two points, and the contact pressure between them increases at the two points, the lower case 11 and the upper frame 12 (with respect to the vertical direction and the horizontal direction) can be fixed without rattling.
Moreover, between the attachment hole 21 and the press deformation | transformation belt | band | zone 22 by the concave two inclined side parts 23a and 23b or two inclination side parts 24a and 24b formed in at least one side of the press deformation | transformation band part 22, A communication hole S having a required size communicating between the inside and outside of the lower case 11 and the upper frame 12 is formed, and the communication hole S becomes a heat radiating hole and a breathing hole, so that without increasing the number of parts, Heat dissipation and moisture release can be ensured at the same time.

(Operation effect 2)
Since the LED bar 8 is a heat source, some heat dissipation means is required. However, by providing the mounting hole 21 on the side of the lower case 11 where the LED bar 8 is provided, a position close to the heat source (the communication hole described above). This is effective because heat can be released from the part S). Furthermore, since the wiring board 7 of the LED bar 8 exists so as to face the mounting hole 21, the light from the part of the mounting hole 21 (the communication hole part S described above) is obtained when the wiring board 7 blocks light from the LED 6. The effect of preventing leakage can also be expected.

(Operation effect 3)
Since the mounting hole 21 is provided at a position overlapping the LED 6, heat is directly radiated from the LED 6, which is a direct heat source in the LED bar 8, through the mounting hole 21 (the communication hole portion S described above). Therefore, heat can be radiated most effectively.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modified examples are disclosed as those of the present invention, it is a matter of course that possible combinations of configurations extending over these are included even if not specifically described. It is. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Liquid crystal module 2 Optical sheet 3 Liquid crystal panel 4 Light guide plate 6 LED
7 Wiring Board 8 LED Bar 11 Lower Case 12 Upper Frame 13 Fixing Part 21 Mounting Hole 22 Pressing Deformation Belt Part 23a Inclined Side Part 23b Inclined Side Part 24a Inclined Side Part 24b Inclined Side Part S Communication Hole Part

Claims (3)

A liquid crystal panel having an optical sheet on the front surface;
A light guide plate disposed on the back side of the liquid crystal panel to guide light to the liquid crystal panel;
An LED bar disposed on one side of the light guide plate and arranged on a wiring board with a plurality of LEDs arranged in a row, and housed in the lower case,
A liquid crystal module in which the lower case is covered with an upper frame, and the lower case and the upper frame are fixed by a fixing part,
The fixing part is
A rectangular mounting hole formed on a side surface of the lower case;
Formed on the side surface of the upper frame, and has a pressing deformation band part that can be immersed and locked into the rectangular mounting hole,
A liquid crystal module characterized in that at least one side of the pressing deformation band portion has a concave shape having two inclined side portions whose width dimension becomes narrower toward the center in the longitudinal direction.   The rectangular mounting hole constituting the fixing portion is provided so that the side of the lower case where the LED bar is provided faces the wiring board on the side opposite to the irradiation surface of the LED. The liquid crystal module according to claim 1.   The liquid crystal module according to claim 2, wherein the mounting hole is provided at a position overlapping the LED.