JP2009036963A - Liquid crystal module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To save a troublesome work of selecting screws for use in a fixing operation of a cell guide so as to reduce the time and cost for manufacturing, and to prevent a problem of screwing a wrong kind of screws. <P>SOLUTION: A liquid crystal module (A) is provided, which comprises: a rear frame 1 having a back part 11, a connection part 121, and a supporting part 122 parallel to the back part 11 and folded outward; a lamp frame 31; and a cell guide 43 in a rectangular frame state pressing a circumference part of a diffusion plate 41 and a diffusion sheet 42. The rear frame 1 has a fixing part 14 formed by cutting and bending a part of the frame, where the lamp frame 31 is placed to cover the fixing part 14, and the cell guide 43 and the lamp frame 31 are fastened together to the fixing part 14. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a liquid crystal module capable of stably fixing a cell guide.

  The liquid crystal module is characterized by being thin, lightweight, and low power consumption, and is widely used as a display device for displaying images such as notebook PCs, PC monitors, TV receivers, and the like.

  A conventional liquid crystal module will be described with reference to the drawings. FIG. 6 is an exploded perspective view of a conventional liquid crystal module. The liquid crystal module B includes a rear frame 91, a reflection sheet 92, a lamp 93, a diffusion plate 941 and a diffusion sheet 942 for diffusing light from the lamp 93, a cell guide 943 that is a rectangular frame, and a rectangular shape. Liquid crystal cell 95 filled with liquid crystal between a pair of glass substrates and a bezel 96 as a support frame on the front side. The lamp 93 is supported by a lamp frame 931, and the lamp frame 931 is fixed to the rear frame 91.

  The diffusion plate 941 and the diffusion sheet 942 are disposed on the front side of the rear frame 91 and the lamp frame 931, and are pressed and fixed by the cell guide 943 from the front side. Further, the liquid crystal cell 95 is disposed on the front side of the cell guide 943 and is fixed by being pressed by the bezel 96 from the front side (see Japanese Patent Laid-Open No. 2001-174789).

  The lamp frame 931 is fixed to the rear frame 91 with screws. The cell guide 943 is fixed to the rear frame 91 and the lamp frame 931 using screws. The bezel 96 is fixed to the rear frame 91 using screws. A part of the screw fixing the bezel 96 penetrates the cell guide 943 and fastens the cell guide 943 together.

  FIG. 7 is a sectional view of the conventional cell guide and the rear frame in a fixed state, and FIG. 8 is a sectional view of the conventional cell guide and the lamp frame in a fixed state. The rear frame 91 is formed by cutting a metal plate, and the lamp frame 931 and the cell guide 943 are resin molded products.

  As shown in FIG. 7, the rear frame 91 has a rectangular back surface portion 911, a rising portion 912 that stands upright from the long side portion of the back surface portion 911, and a front end portion of the rising portion 912 that is parallel to the back surface portion 911. And a support portion 913 formed by being bent. The diffusion plate 941 and the diffusion sheet 942 are disposed in contact with the support portion 913 and are pressed and fixed by the cell guide 943. A female screw hole 914 is formed in the support portion 913, and a through hole 9431 is formed in the cell guide 943, and a screw penetrating the through hole 9431 is screwed into the female screw hole 914, whereby the cell guide 943 is fixed to the rear frame 91.

  As shown in FIG. 8, the diffusion plate 941 and the diffusion sheet 942 are disposed in contact with the lamp frame 931 and are pressed and fixed by the cell guide 943. A female screw hole 932 is formed in the lamp frame 931, and a through hole 9432 is formed in the cell guide 943, and a screw penetrating the through hole 9432 is screwed into the female screw hole 932, whereby the cell guide 943 is fixed to the rear frame 91.

JP 2001-174789 A

  However, since the rear frame 91 is formed by bending a metal plate, and the lamp frame 931 is a resin molded body, the screw to be screwed with the rear frame 91 is for metal, and the screw with the lamp frame 931 is screwed. The screw to be used must be for resin. That is, to attach the cell guide 943, a metal screw and a resin screw must be prepared, and the number of parts increases.

  Further, since the metal screw and the resin screw are different in screw size and shape and have different tightening torques, they are often tightened using different tightening tools. In this case, the manufacturer has to change different types of tools in order to fix the cell guide 943 to the rear frame 91 and the lamp frame 931 folded on the rear frame 91. Work becomes complicated.

  Further, there may be a mistake that a screw for metal is screwed into the lamp frame 931 or a screw for resin is screwed into the rear frame 91. When screwing together with the wrong type of screw in this way, the screw thread will be crushed and the screw will not be able to be removed (it will be difficult to remove), or the screw will not be tightened sufficiently and the screw will come off while using the LCD module. There is a high possibility of problems such as mishaps.

  Therefore, an object of the present invention is to provide a liquid crystal module in which a cell guide is stably fixed.

  Another object of the present invention is to save the trouble of using different screws during the cell guide fixing operation.

  Furthermore, an object of the present invention is to suppress the occurrence of a problem that a wrong type of screw is screwed in a cell guide fixing operation.

  In order to achieve the above object, the present invention is formed by cutting and bending a metal plate, a rectangular rear part, a connection part erected obliquely from both long sides of the rear part, and the connection part. A rear frame provided with a support portion that is parallel to the back portion and bent outward, a lamp frame that holds the lamp on the back side, and an outer peripheral portion disposed in contact with the support portion and the lamp frame; A rectangular diffusion plate for diffusing light, a rectangular diffusion sheet for diffusing light disposed on the diffusion plate, and an outer peripheral portion of the diffusion plate and the diffusion sheet with the support portion and the lamp frame A rectangular frame-shaped cell guide that sandwiches the rear frame, the rear frame has a fixed portion formed by cutting a part thereof, and the lamp frame is disposed so as to cover the fixed portion, In front of the front A through hole is provided at a position overlapping with the fixing portion, and the cell guide has a locking hole at a position overlapping with the through hole of the lamp frame, and the locking hole of the cell guide and the lamp frame are passed through. A hole is penetrated by a screw, and a screw hole formed in the fixed portion is screwed with the screw.

  According to this configuration, when the cell guide is fixed to the rear frame and the lamp frame, a metal screw can be used instead of a resin screw. This means that when assembling the liquid crystal module, the resin screw can be eliminated, thereby reducing the number of parts.

  Moreover, since it is not necessary to use two or more types of screws having different shapes, tightening torques, etc., it is not necessary to change the tool, and it is possible to save labor for manufacturing. Further, by using two different types of screws, it is possible to reduce mistakes in screw misplacement that occur, and it is possible to reduce the occurrence of problems due to screw mistakes.

  In the above configuration, the rear frame includes a frame portion formed by bending a short side of the back surface, and the fixing portion is formed by cutting a part of the frame portion. Also good. At this time, the lamp frame may be disposed so as to contact the frame portion, and may have a concave portion in which the fixing portion is disposed on a surface facing the frame portion.

In the above configuration, the cell guide connects four L-shaped members formed so that a long part forming a part of the long side part and a short part forming a part of the short side part are orthogonal to each other. And
At least one of the joint fastening through holes may be formed in the short side portion of each L-shaped member.

  In the above configuration, the cell guide is fixed by screwing the long portion to the support portion of the rear frame, and the long portion is fixed to the support portion and the short portion is fixed to the fixed portion. Fixing may be performed using screws having the same shape.

  According to this configuration, since only one type of screw having the same shape is used when fixing the cell guide, it is possible to save the trouble of searching for and changing the screw and simplify the manufacturing process. it can. In addition, since the manufacturing process is simplified, it is possible to manufacture a product with high accuracy in a short time without causing mistakes.

  According to the present invention, it is possible to provide a liquid crystal module in which metal screws are all used as screws used for fixing the cell guide and the cell guide is stably fixed.

  Further, according to the present invention, it is possible to save time and labor for using the screws during the cell guide fixing operation, and to reduce the manufacturing effort and cost accordingly.

  Furthermore, according to the present invention, it is possible to suppress the occurrence of a problem that the wrong type of screw is screwed in the cell guide fixing operation.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view of a liquid crystal module according to the present invention. As shown in FIG. 1, the liquid crystal module A includes at least a rear frame 1, a reflection sheet 2, a lamp 3, a lamp frame 31, a light diffusion member 4, a liquid crystal cell 5, and a bezel 6.

  The rear frame 1 is formed by bending a metal plate, and includes a rectangular back surface portion 11, a rising portion 12 erected from a pair of long sides of the back surface portion 11, and a pair of short sides of the back surface portion 11. A frame portion 13 that is more upright. The rising portion 12 is connected to the connection portion 121 rising from the back surface portion 11, the connection portion 121, the support portion 122 that supports the long side of the liquid crystal panel 4, and the outer frame that is connected to the support portion 122 and faces the connection portion 121. Part 123.

  The reflection sheet 2 is disposed on the front side of the rear frame 1 and is attached in close contact with the back surface portion 11 and the connection portion 121 of the rear frame 1. On the front side of the rear frame 1, a reflecting sheet 2 is disposed, and then a lamp 3 used as a backlight is disposed. The lamp 3 is a cathode tube formed in a U-shape, and lamp holders 30 are attached to both ends thereof. The lamp holder 30 is fixed in contact with the back surface portion 11, the connection portion 121 and the frame portion 13. An electric wire (not shown) is connected to the lamp holder 30, and electric power for driving the lamp 3 is supplied from the electric wire.

  A lamp frame 31 is provided on the short side of the rear frame 1 from the front side, and holds the lamp holder 30 of the lamp 3 and the folded portion. The lamp frame 31 is formed in a trapezoidal shape and is disposed so as to contact the back surface portion 11 and the connection portion 121 of the rear frame 1. In addition, the lamp frame 31 includes a support portion 311 disposed on the same plane as the support portion 122 of the rear frame 1 in a state where the lamp frame 31 is disposed on the short side of the rear frame 1 in contact with the frame portion 13.

  The light diffusion member 4 includes a diffusion plate 41 and a diffusion sheet 42 for diffusing the light emitted from the lamp 3 and the light reflected by the reflection sheet 2, and a cell guide 43. The diffusing plate 41 is supported at the outer peripheral portion by the support portion 122 of the rear frame 1 and the support portion 311 of the lamp frame 31, and two diffusion sheets 42 are disposed on the upper portion thereof. The cell guide 43 is a rectangular frame that presses the four sides of the diffusion plate 41 and the diffusion sheet 42 toward the support portion 122 of the rear frame 1 and the support portion 311 of the lamp frame 31 from the upper surface side. The cell guide 43 is divided into four L-shaped members including each corner.

  A liquid crystal cell 5 is placed on the cell guide 43. The liquid crystal cell 5 includes a liquid crystal panel 51, a source driver 52 connected to the liquid crystal panel 51, and a gate driver 53. The liquid crystal panel 51 includes two glass substrates 511 and 512 arranged in parallel, and a liquid crystal layer 513 filled between the glass substrates 511 and 512.

  In the liquid crystal cell 5, the glass substrate 511 is provided with a transparent electrode (common electrode: not shown) formed in an image area where an image is formed. The glass substrate 512 is provided with a transparent electrode (pixel electrode: not shown) formed independently for each pixel, and a switching element (transistor: not shown) is attached to the pixel electrode. Note that the common electrode and the pixel electrode may be formed on the other glass substrate.

  The bezel 6 is a metal frame that can cover the front side of the support portion 122 of the rear frame 1 and the support portion 311 of the lamp frame 31. The bezel 6 has an opening 60 on the front side so that the image display unit of the liquid crystal cell 5 can be seen from the outside. The bezel 6 has an L-shaped cross section. The bezel 6 includes a front portion 61 that faces the support portion 122 of the rear frame 1 and the support portion 311 of the lamp frame 31, and a side surface portion 62 that contacts the outer frame portion 123 and the frame portion 13 of the rear frame 1. Yes. The bezel 6 is fixed to the outer frame portion 123 and the frame portion 13 of the rear frame 1 by screwing.

  The lamp frame 31 and the cell guide 43 are fixed to the rear frame 1 with a partly common screw. A structure for fixing the cell guide 43 to the rear frame 1 will be described below with reference to the drawings. FIG. 2 is a plan view of the rear frame of the liquid crystal module according to the present invention, and FIG. 3 is a cross-sectional view of the rear frame shown in FIG. Screw holes 124 are formed in the support portion 122 of the rear frame 1 at equal intervals.

  As shown in FIGS. 2 and 3, the rear frame 1 has a fixing portion 14 formed by bending a part of the frame portion 13. As shown in FIGS. 2 and 3, the fixing portion 14 includes a base portion 141 projecting from the inside of the frame portion 13 so as to be parallel to the back surface portion 11 of the rear frame 1, and the frame portion 13 of the base portion 141. From the intersecting sides, a rectangular rising portion 142 protruding from the opposite side of the back surface portion 11, a pedestal portion 143 protruding from the tip of the rising portion 142, and a screw formed inside the pedestal portion 143 And a hole 144. As shown in FIG. 2, two fixing portions 14 are formed on one frame portion 13.

  The light diffusing member 4 is disposed on the rear frame 1 on which the lamp frame 31 is disposed. 4 is a plan view of a state in which the light diffusing member is attached to the rear frame, and FIG. 5 is a YY sectional view of the rear frame and the light diffusing member shown in FIG.

  As shown in FIG. 4, the lamp frame 31 is attached so as to contact the frame portion 13 of the rear frame 1. As shown in FIG. 5, a concave groove 312 is formed in a portion of the lamp frame 31 that overlaps with the fixing portion 14 on the surface facing the frame portion 13 when arranged on the rear frame 1. In the lamp frame 31, a through hole 313 that penetrates from the support portion 311 to the concave groove 312 is formed at a portion corresponding to the concave groove 312 of the support portion 311. As shown in FIG. 4, two concave grooves 312 and through holes 313 are formed in the lamp frame 31. However, the present invention is not limited to this, and is formed in accordance with the fixing portion 14.

  As shown in FIG. 4, the cell guide 43 is divided into four L-shaped members. In this L-shaped member, those arranged on the diagonal line have the same shape. The cell guide 43 is formed by combining two first divided portions 431 and two second divided portions 432. In the cell guide 43 shown in FIG. 4, the first dividing portion 431 is arranged at the upper right and lower left in the drawing, and the second dividing portion 432 is arranged at the upper left and lower right in the drawing. Here, for convenience, the state fixed to the short side on the left side of the liquid crystal cell A will be described, but the short side on the right side in the figure also has the same configuration and is fixed in the same manner.

  As shown in FIG. 4, the first dividing portion 431 has a short portion 4311 and a long portion 4312, and the second dividing portion 432 has a short portion 4321 and a long portion 4322. The short part 4311 of the first divided part 431 and the short part 4321 of the second divided part 432 have a locking hole 433. The locking hole 433 is formed so as to overlap with the through hole 313 when the short part 4311 and the short part 4321 are arranged in the support part 311. The long portion 4312 of the first divided portion 431 and the long portion 4322 of the second divided portion 432 have a locking hole 434. The locking hole 434 is formed so as to overlap with the screw hole 124 formed in the support portion 122 of the rear frame 1.

  The lamp frame 31 is disposed on the rear frame 1 so as to be in contact with the frame portion 13 and so that the fixing portion 14 is accommodated in the concave groove 312. At this time, a reflection sheet 2 and a lamp 3 are attached to the rear frame 1 in advance. The diffusing plate 41 and the diffusing sheet 42 are arranged such that the long sides are in contact with the support portion 122 of the rear frame 1 and the short sides are in contact with the support portion 311 of the lamp frame 31. The diffusion plate 41 and the diffusion sheet 42 are positioned by convex portions (not shown) formed on the support portion 122 and the support portion 311.

  As described above, the cell guide 43 is formed by assembling the first divided portion 431 and the second divided portion 432. The cell guide 43 is disposed so as to contact the support portion 122 of the rear frame 1 and the support portion 311 of the lamp frame 31. In a state where the cell guide 43 is arranged, the screw Bt is passed through the locking hole 433 and the through hole 313 from the cell guide 43 side, and is screwed into the screw hole 144 of the base portion 143. Similarly, the screw Bt passes through the locking hole 434 from the cell guide 43 side and is screwed into the screw hole 124.

  In this way, the cell guide 43 is fixed to the rear frame 1 while sandwiching the peripheral portions of the diffusion plate 41 and the diffusion sheet 42 with the support portion 122 of the rear frame 1 and the support portion 311 of the lamp frame 31. At this time, the screw Bt is disposed so as not to contact the diffusion plate 41 and the diffusion sheet 42.

  Thus, both the screw hole 124 and the screw hole 144 into which the screw Bt is screwed are formed in the rear frame 1. Therefore, at least when the cell guide 43 is fixed to the rear frame 1, the screw Bt used can be unified with a metal screw. Further, the length of the screw and the diameter of the screw can be unified, and the lamp holder 31 and the cell guide 43 can be fixed to the rear frame 1 with one type of screw.

  Accordingly, it is not necessary to use a plurality of types of screws as compared with the conventional case in which the cell guide 43 is fixed to the resin with screws, and accordingly, the types of components can be reduced and the cost can be reduced. In addition, since it is not necessary to use different screws, the labor of manufacturing can be saved. By eliminating the manufacturing effort, manufacturing time can be reduced and costs can be reduced, and mistakes in making the wrong type of screw (using a metal screw for the resin or vice versa) can be reduced. Therefore, it is possible to suppress the problem that the screwing is insufficient or the screw is overtightened and the member is easily detached or the screw is crushed and cannot be disassembled.

  As mentioned above, although embodiment of invention was described concretely, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary.

  The present invention can be employed in a liquid crystal module.

It is a disassembled perspective view of the liquid crystal module concerning this invention. It is a top view of the rear frame of the liquid crystal module concerning the present invention. FIG. 3 is a cross-sectional view of the rear frame shown in FIG. 2 taken along line XX. It is a top view of the state which attached the light-diffusion member to the rear frame. FIG. 5 is a YY sectional view of the rear frame and the light diffusing member shown in FIG. 4. It is a disassembled perspective view of the conventional liquid crystal module. It is sectional drawing of the fixed state of the conventional cell guide and a rear frame. It is sectional drawing of the fixed state of the conventional cell guide and a lamp frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rear frame 11 Back part 12 Rising part 121 Connection part 122 Support part 123 Outer frame part 13 Frame part 14 Fixing part 2 Reflection sheet 3 Lamp 31 Lamp frame 4 Light diffusion member 41 Cell guide 42 Diffusion plate 43 Diffusion sheet 5 Liquid crystal cell 51 Liquid crystal panel 52 Source driver 53 Gate driver 6 Bezel

Claims (5)

Formed by cutting and bending a metal plate, a rectangular back surface, a connection portion erected obliquely from both long sides of the back surface portion, and parallel to the back surface portion from the connection portion and outward A rear frame with a bent support, and
A lamp frame that holds the lamp on the back side;
A rectangular diffuser plate in which an outer peripheral portion is disposed in contact with the support portion and the lamp frame, and diffuses light;
A rectangular diffusion sheet for diffusing the light placed on the diffusion plate; and
A rectangular frame-shaped cell guide that sandwiches the outer peripheral portion of the diffusion plate and the diffusion sheet with the support portion and the lamp frame;
The rear frame has a fixed part formed by cutting and bending a part thereof,
The lamp frame is disposed so as to cover the fixed portion, and has a through hole at a position overlapping the fixed portion on the front side,
The cell guide has a locking hole at a position overlapping the through hole of the lamp frame;
The liquid crystal module according to claim 1, wherein a locking hole of the cell guide and a through hole of the lamp frame are penetrated by a screw, and a screw hole formed in the fixing portion is screwed with the screw. The rear frame has a frame portion formed by bending the short side of the back surface,
The liquid crystal module according to claim 1, wherein the fixing portion is formed by cutting and bending a part of the frame portion.   The liquid crystal module according to claim 2, wherein the lamp frame is disposed so as to be in contact with the frame portion, and a concave portion in which the fixing portion is disposed is formed on a surface facing the frame portion. The cell guide is formed by connecting four L-shaped members formed so that a long part forming a part of the long side part and a short part forming a part of the short side part are orthogonal to each other. Yes,
4. The liquid crystal module according to claim 1, wherein at least one through-tightening through hole is formed in a short side portion of each L-shaped member. The cell guide is fixed by screwing a long portion to the support portion of the rear frame,
The liquid crystal module according to claim 4, wherein the fixing of the long part to the support part and the fixing of the short part to the fixing part are performed using screws having the same shape.

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