JP2012123338A - Lcd module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of an LCD module by reducing the number of components used for fixing an LED bar.SOLUTION: An LCD module 1 comprises a liquid crystal panel 2, an LED bar 5 having an LED 4 mounted on a circuit board 3, a light guide plate 6 for guiding light emitted from the LED 4 to the liquid crystal panel 2, a front frame 7 supporting the liquid crystal panel 2, a rear frame 8 supporting the LED bar 5 and the light guide plate 6, a cell guide 9 for fixing the liquid crystal panel 2 and the light guide plate 6, and a stopper 10 for fixing the LED bar 5. The stopper 10 is integrally formed with the cell guide 9, and fixes the LED bar 5 between the stopper 10 and a side wall 8b of the rear frame 8 by pressing the circuit board 3 of the LED bar 5 toward the side wall 8b of the rear frame 8. Thus, the LED bar 5 can be fixed to the rear frame 8 without the use of an adhesive tape or a screw.

Description

  The present invention relates to an LCD (Liquid Crystal Display) module that displays an image on a liquid crystal panel.

  Conventionally, in an LCD module, light emitted from an LED (Light Emitting Diode) is guided to a liquid crystal panel by a light guide plate, and the light is used as a backlight to display an image on the liquid crystal panel. (For example, see Patent Documents 1 to 5).

  Further, as such an LCD module, there is one shown in FIGS. The LCD module 50 guides light emitted from the LEDs 51 to the liquid crystal panel 53 by the light guide plate 52 and displays an image on the liquid crystal panel 53 using the light as a backlight.

  The light guide plate 52 is disposed between the rear wall 56 a of the rear frame 56 and the guide wall 57 a of the cell guide 57, and a part of the light guide plate 52 overlaps the light guide opening 57 c of the cell guide 57. . The light guide plate 52 is fixed to the rear wall 56 a of the rear frame 56 by being pressed against the rear wall 56 a of the rear frame 56 by the guide wall 57 a of the cell guide 57.

  The liquid crystal panel 53 is disposed between the front wall 58 a of the front frame 58 and the guide wall 57 a of the cell guide 57, and a part of the liquid crystal panel 53 overlaps the light guide opening 57 c of the cell guide 57. At the same time, it faces the display opening 58c of the front frame 58. The liquid crystal panel 53 is fixed to the front wall 58 a of the front frame 58 by being pressed against the front wall 58 a of the front frame 58 by the guide wall 57 a of the cell guide 57.

  A plurality of LEDs 51 are mounted on the circuit board 54. An assembly in which the plurality of LEDs 51 are mounted on the circuit board 54 is referred to as an LED bar 55. The LED bar 55 is disposed between the side wall 56 b of the rear frame 56 and the light guide plate 52, and the light emission direction of the LED 51 is directed to the direction in which the light guide plate 52 is disposed. The LED bar 55 is fixed to the side wall 56 b of the rear frame 56 using an adhesive tape 59. That is, the LED bar 55 is fixed to the side wall 56 b of the rear frame 56 by bonding the circuit board 54 to the side wall 56 b of the rear frame 56 with the adhesive tape 59.

  In order to dissipate heat generated by the LED 51, the rear frame 56 is made of metal, and the tape material and the adhesive of the adhesive tape 59 are excellent in heat conduction. Also, the LED bar 55 is fixed to the side wall 56b of the rear frame 56 by attaching the circuit board 54 of the LED bar 55 to the side wall 56b of the rear frame 56 using screws instead of the adhesive tape 59. There is also.

JP 2005-173302 A JP 2006-49098 A JP 2009-3081 A JP 2010-103355 A Special table 2010-515220 gazette

  By the way, in the above-mentioned conventional LCD module, since the adhesive tape or the screw is used to fix the LED bar, the number of parts is large and the cost is increased. Even if the contents disclosed in Patent Document 1 to Patent Document 3 described above are applied, the above problem cannot be solved.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an LCD module capable of reducing the number of parts for fixing the LED bar and reducing the cost.

  In order to achieve the above object, the invention of claim 1 includes a liquid crystal panel, an LED bar having an LED mounted on a circuit board, a light guide plate for guiding light emitted from the LED to the liquid crystal panel, an LED bar, In an LCD module including a rear frame that supports a light guide plate and a cell guide that fixes the light guide plate to the rear wall of the rear frame, the LED bar provided integrally with the cell guide is fixed to the side wall of the rear frame. The stopper is provided.

  According to a second aspect of the present invention, in the LCD module according to the first aspect, the stopper presses the circuit board of the LED bar against the side wall of the rear frame, whereby the LED bar is placed between the stopper and the side wall of the rear frame. It is to be fixed.

  According to a third aspect of the present invention, in the LCD module according to the first or second aspect, the rear frame has a fitting hole into which the tip of the stopper is fitted in the rear wall, and the stopper has a tip of the rear frame. It is inserted into the insertion hole.

  According to a fourth aspect of the present invention, in the LCD module according to the third aspect, the stopper has an engaging portion for preventing the stopper from coming off from the fitting hole of the rear frame.

  According to a fifth aspect of the present invention, in the LCD module according to any one of the first to fourth aspects, the LED bar has a plurality of LEDs mounted on its circuit board, and the stopper has a plurality of LEDs. It is provided so that it may be located between each LED.

  According to a sixth aspect of the present invention, in the LCD module according to any one of the first to fifth aspects, the rear frame is made of metal, and the cell guide is made of resin.

  The invention of claim 7 is the LCD module according to any one of claims 1 to 6, further comprising a front frame that supports the liquid crystal panel, and the cell guide includes the liquid crystal panel and the front frame. It is fixed between the front wall.

  According to invention of Claim 1 thru | or 7, LED bar is fixed to a rear frame by the stopper provided integrally with the cell guide. Accordingly, the LED bar can be fixed to the rear frame without using an adhesive tape or a screw, and the number of parts for fixing the LED bar can be reduced to reduce the cost.

  According to the invention of claim 3, when the tip of the stopper is fitted into the fitting hole of the rear frame, the stopper is regulated so as not to be displaced, and the LED bar can be more reliably fixed.

  According to the invention of claim 4, the stopper is prevented from coming off from the fitting hole of the rear frame, and the LED bar can be more securely fixed.

  According to the invention of claim 5, the LED bar can be more reliably fixed by the stopper being positioned between the LEDs of the plurality of LEDs.

  According to the invention of claim 6, since the rear frame is made of metal, the heat generated by the LED can be efficiently radiated.

(A) is a perspective view which shows schematic structure of the LCD module which concerns on one Embodiment of this invention, (b) is a disassembled perspective view of the LCD module. (A) is sectional drawing to which the LCD module was expanded partially, (b) is the sectional view on the AA line of (a). (A) is sectional drawing to which the conventional LCD module was expanded, (b) is the BB sectional drawing of (a).

  Hereinafter, an LCD module according to an embodiment of the present invention will be described with reference to the drawings. FIGS. 1A and 1B and FIGS. 2A and 2B show the configuration of the LCD module according to the present embodiment.

  The LCD module 1 supports and accommodates the liquid crystal panel 2, the LED bar 5 in which the LEDs 4 are mounted on the circuit board 3, the light guide plate 6 that guides the light emitted from the LEDs 4 to the liquid crystal panel 2, and the liquid crystal panel 2. A front frame 7 that supports and houses the LED bar 5 and the light guide plate 6, a cell guide 9 that fixes the liquid crystal panel 2 and the light guide plate 6, and a stopper 10 that fixes the LED bar 5. Etc. The LCD module 1 guides light emitted from the LEDs 4 to the liquid crystal panel 2 by the light guide plate 6 and displays an image on the liquid crystal panel 2 using the light as a backlight.

  The LED bar 5 has a plurality of LEDs 4 mounted on its circuit board 3. The circuit board 3 has rigidity and is formed in an elongated shape extending straight with a substantially constant thickness. The plurality of LEDs 4 are mounted on the circuit board 3 in a line at equal intervals.

  The rear frame 8 is made of metal and has a rear wall 8a and a side wall 8b. The rear wall 8a is formed in a substantially rectangular shape. The side wall 8b protrudes substantially perpendicularly from the support surface 8c of the rear wall 8a at the outer peripheral portion of the rear wall 8a.

  The front frame 7 is made of metal and has a front wall 7a and a side wall 7b. The front wall 7 is formed in a substantially rectangular shape, and a display opening 7c is formed in the center of the front wall 7a. The side wall 7b protrudes substantially perpendicularly from the support surface 7d of the front wall 7a at the outer peripheral portion of the front wall 7a.

  The cell guide 9 is made of resin and has a guide wall 9a and a side wall 9b. The guide wall 9a is formed in a substantially rectangular shape, and a light guide opening 9c is formed in the center of the guide wall 9a. The side wall 9b protrudes substantially perpendicularly from the front guide surface 9d of the guide wall 9a at the outer peripheral portion of the guide wall 9a, and substantially from the rear guide surface 9e (surface opposite to the front guide surface 9d) of the guide wall 9a. Projects vertically. That is, the side wall 9b includes a front side wall 9f protruding from the front guide surface 9d of the guide wall 9a and a rear side wall 9g protruding from the rear guide surface 9e.

  The stopper 10 is made of resin, is provided integrally with the cell guide 9, and protrudes substantially vertically from the rear guide surface 9 e of the guide wall 9 a of the cell guide 9. A plurality of stoppers 10 are provided.

  The LED bar 5 and the light guide plate 6 are disposed at a position (on the support surface 8c of the rear wall 8a) surrounded by the rear wall 8a and the side wall 8b of the rear frame 8. The cell guide 9 is supported by the guide wall 9a and the rear side wall 9g on the support surface 8c side of the rear wall 8a of the rear frame 8 (a position surrounded by the rear wall 8a and the side wall 8b of the rear frame 8) and the rear frame 8. The rear frame 8 is mounted so as to cover the side wall 8b. That is, the rear frame 8 faces the guide wall 9a and the rear side wall 9g of the cell guide 9 with the support surface 8c side of the rear wall 8a of the rear frame 8 facing the guide wall 9a of the cell guide 9 toward the rear guide surface 9e. It is placed in an enclosed position. Therefore, the LED bar 5 and the light guide plate 6 are located between the rear wall 8 a of the rear frame 8 and the guide wall 9 a of the cell guide 9. A part of the light guide plate 6 overlaps the light guide opening 9 c of the cell guide 9. The circuit board 3 of the LED bar 5 is located between the stopper 10 and the side wall 8 b of the rear frame 8. The light emission direction of the LED 4 of the LED bar 5 faces the direction in which the light guide plate 6 is located.

  The liquid crystal panel 2 is disposed at a position surrounded by the guide wall 9a and the front side wall 9f of the cell guide 9 (position on the front guide surface 9d of the guide wall 9a). The front frame 7 includes a front wall 7a and a side wall 7b. The front guide surface 9d side of the guide wall 9a of the cell guide 9 (a position surrounded by the guide wall 9a and the front side wall 9f of the cell guide 9) and the cell guide 9 Is attached to the cell guide 9 so as to cover the side wall 9b (the front side wall 9f and the rear side wall 9g). That is, the cell guide 9 is surrounded by the front wall 7a and the side wall 7b of the front frame 7 with the front guide surface 9d side of the guide wall 9a of the cell guide 9 facing the support surface 7d side of the front wall 7a of the front frame 7. It is arranged at the position. Therefore, the liquid crystal panel 2 is located between the front wall 7 a of the front frame 7 and the guide wall 9 a of the cell guide 9. A part of the liquid crystal panel 2 overlaps the light guide opening 9 c of the cell guide 9 and faces the display opening 7 c of the front frame 7.

  The cell guide 9 fixes the light guide plate 6 between the guide wall 9a of the cell guide 9 and the rear wall 8a of the rear frame 8 by pressing the light guide plate 6 against the rear wall 8a of the rear frame 8 by the guide wall 9a. ing. Further, the cell guide 9 presses the liquid crystal panel 2 against the front wall 7a of the front frame 7 by the guide wall 9a, so that the liquid crystal panel 2 is placed between the guide wall 9a of the cell guide 9 and the front wall 7a of the front frame 7. It is fixed.

  The stopper 10 fixes the LED bar 5 between the stopper 10 and the side wall 8 b of the rear frame 8 by pressing the circuit board 3 of the LED bar 5 against the side wall 8 b of the rear frame 8. As described above, a plurality of stoppers 10 are provided. The plurality of stoppers 10 are provided at equal intervals in one row so as to be positioned between the LEDs 4 of the plurality of LEDs 4. That is, the plurality of stoppers 10 press the circuit board 3 of the LED bar 5 against the side wall 8 b of the rear frame 8 at the position between the LEDs 4 of the plurality of LEDs 4.

  Further, the rear frame 8 has a fitting hole 8d into which the tip of the stopper 10 is fitted in the rear wall 8a, and the tip of the stopper 10 is fitted into the fitting hole 8d in the rear wall 8a of the rear frame 8. Yes. Further, the stopper 10 has an engaging portion 10a for preventing the rear frame 8 from coming off from the fitting hole 8d at the tip thereof, and the engaging portion 10a passes through the fitting hole 8d and passes through the rear frame 8. The rear wall 8a is engaged with the rear wall 8a of the rear frame 8 from the outer surface (surface opposite to the support surface 8c) side.

  When the cell guide 9 is attached to the rear frame 8, the stopper 10 and the fitting hole 8d press the circuit board 3 of the LED bar 5 against the side wall 8b of the rear frame 8 and the tip of the stopper 10 is fitted into the fitting hole 8d. The engagement portion 10a of the stopper 10 is designed to be engaged with the rear wall 8a of the rear frame 8.

  Next, a method for assembling the LCD module 1 will be described. The LCD module 1 is assembled as follows.

  First, the light guide plate 6 is placed at a predetermined position (on the support surface 8c of the rear wall 8a) surrounded by the rear wall 8a and the side wall 8b of the rear frame 8. Further, the LED bar 5 is placed at a predetermined position (on the support surface 8c of the rear wall 8a) surrounded by the rear wall 8a and the side wall 8b of the rear frame 8, and the light emission direction of the LED 4 is the direction of the light guide plate 6. Place it on the side. Then, with the cell guide 9 facing the rear guide surface 9e side of the guide wall 9a toward the support surface 8c side of the rear wall 8a of the rear frame 8, the rear frame 8 is moved from the support surface 8c side of the rear wall 8a of the rear frame 8. It is attached to the rear frame 8 so as to cover it. At this time, the front ends of the plurality of stoppers 10 are fitted into the fitting holes 8d of the rear wall 8a of the rear frame 8, and the engaging portions 10a are arranged on the outer surface of the rear wall 8a of the rear frame 8 (surface opposite to the support surface 8c). ) Is engaged with the rear wall 8a of the rear frame 8 from the side.

  Thereby, the cell guide 9 is in a state where the light guide plate 6 is pressed against the rear wall 8a of the rear frame 8 by the guide wall 9a, and the light guide plate 6 is connected to the guide wall 9a of the cell guide 9 and the rear wall 8a of the rear frame 8. Fixed between. In addition, the plurality of stoppers 10 are in a state where the circuit board 3 is pressed against the side wall 8b of the rear frame 8 at positions between the LEDs 4 of the plurality of LEDs 4, and the LED bar 5 is connected to the side walls of the plurality of stoppers 10 and the rear frame 8. 8b.

  Subsequently, the liquid crystal panel 2 is placed at a position surrounded by the guide wall 9a and the front side wall 9f of the cell guide 9 (position on the front guide surface 9d of the guide wall 9a). Then, the front frame 7 is arranged so as to cover the cell guide 9 from the front guide surface 9d side of the cell guide 9 with the support surface 7d side of the front wall 7a facing the front guide surface 9d side of the guide wall 9a of the cell guide 9. The cell guide 9 is attached.

  As a result, the cell guide 9 is in a state where the liquid crystal panel 2 is pressed against the front wall 7a of the front frame 7 by the guide wall 9a, and the liquid crystal panel 2 is connected to the guide wall 9a of the cell guide 9 and the front wall 7a of the front frame 7. Fixed between. Thereby, the LCD module 1 is completed. The LCD module 1 is assembled in this way.

  According to the LCD module 1 configured as described above, the LED bar 5 is pressed against the side wall 8b of the rear frame 8 by the stopper 10 provided integrally with the cell guide 9 on the circuit board 3 of the LED bar 5. The rear frame 8 is fixed. Accordingly, the LED bar 5 can be fixed to the rear frame 8 without using an adhesive tape or a screw, and the number of parts for fixing the LED bar 5 can be reduced to reduce the cost.

  In addition, when the tip of the stopper 10 is fitted into the fitting hole 8d of the rear frame 8, the stopper 10 is regulated so as not to be displaced, and the LED bar 5 can be more reliably fixed. Further, the engaging portion 10a at the tip of the stopper 10 is engaged with the rear wall 8a of the rear frame 8, so that the stopper 10 is prevented from coming off from the fitting hole 8d of the rear frame 8, and the LED bar 5 is more reliably secured. Can be fixed to.

  Further, the plurality of stoppers 10 can more securely fix the LED bar 5 by pressing the circuit board 3 of the LED bar 5 against the side wall 8b of the rear frame 8 at a position between the LEDs 4 of the plurality of LEDs 4. it can.

  Further, since the rear frame 8 is made of metal, heat generated by the LEDs 4 of the LED bar 5 can be efficiently radiated. Moreover, the plurality of stoppers 10 press the circuit board 3 of the LED bar 5 against the side wall 8b of the rear frame 8 at a position between the LEDs 4 of the plurality of LEDs 4, so that the LED bar 5 can be rear-ranged over a wide range. 8 can be contacted. Thereby, the heat generated in the LED 4 can be efficiently transmitted to the rear frame 8, and the heat generated in the LED 4 can be radiated more efficiently.

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible. For example, the stopper is not limited to each LED, and may be provided for every other LED or every two LEDs. Further, the stopper does not have to have an engaging portion. Further, the stopper may not be configured to be fitted into the fitting hole of the rear frame.

1 LCD module 2 Liquid crystal panel 3 Circuit board 4 LED
5 LED bar 6 Light guide plate 7 Front frame 7a Front wall 7b Side wall 7c Display opening 7d Support surface 8 Rear frame 8a Rear wall 8b Side wall 8c Support surface 8d Insertion hole 9 Cell guide 9a Guide wall 9b Side wall 9c Light guide opening 9d Front Guide surface 9e Rear guide surface 9f Front side wall 9g Rear side wall 10 Stopper 10a Engagement part

Claims (7)

A liquid crystal panel; an LED bar having an LED mounted on a circuit board; a light guide plate for guiding light emitted from the LED to the liquid crystal panel; a rear frame supporting the LED bar and the light guide plate; In an LCD module comprising a cell guide for fixing a light guide plate to the rear wall of the rear frame,
Provided with a stopper for fixing the LED bar to the side wall of the rear frame, provided integrally with the cell guide;
An LCD module characterized by that. The stopper fixes the LED bar between the stopper and the side wall of the rear frame by pressing the circuit board of the LED bar against the side wall of the rear frame.
The LCD module according to claim 1. The rear frame has a fitting hole in which a tip of the stopper is fitted on the rear wall,
The stopper has a tip fitted into the fitting hole of the rear frame.
The LCD module according to claim 1, wherein the LCD module is a liquid crystal display module. The stopper has an engagement portion at the tip thereof for preventing the rear frame from coming off from the fitting hole.
The LCD module according to claim 3. The LED bar has a plurality of LEDs mounted on its circuit board,
The stopper is provided so as to be positioned between the LEDs of the plurality of LEDs.
The LCD module according to claim 1, wherein the LCD module is a liquid crystal display. The rear frame is made of metal, and the cell guide is made of resin.
The LCD module according to claim 1, wherein the LCD module is a liquid crystal display. A front frame for supporting the liquid crystal panel;
The cell guide fixes the liquid crystal panel between the cell guide and a front wall of the front frame.
The LCD module according to claim 1, wherein the LCD module is an LCD module.

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