TWI412835B - Backlight module, display device and fabricating method thereof - Google Patents

Abstract

A backlight module, a display device and a fabricating method thereof are provided. The backlight module includes a back frame, a light source unit, a light guide plate, a cover and at least a screw. The back frame has a trough and at least a lock-hole. The lock-hole is disposed at the through. The light source unit is disposed on the back frame. The light guide plate having a protruding part and at least a first through hole is disposed on the back frame. Wherein the protruding part is protruded at the edge of the light guide plate, the first through hole is disposed at the protruding part, the protruding part is disposed at the trough and the first through hole is corresponding to the lock-hole. The cover having at least a second through hole is covered on the light guide plate and the light source unit. The screw is inserted into the second through hole and the first through hole and locked on the lock-hole of the back frame, such that the cover, the light source unit and the light guide plate are fastened on the back frame.

Description

Backlight module, display device and assembly method thereof

The present invention relates to a backlight module, a display device, and an assembly method thereof, and more particularly to a backlight module, a display device, and an assembly method thereof.

The backlight module is one of the key components of the liquid crystal display device. Since the liquid crystal itself does not emit light, the function of the backlight module is to supply a sufficient light source with uniform brightness and distribution.

The backlight module is mainly assembled by components such as a back frame, a light source component, and a light guide plate. Generally, the conventional assembly method of the backlight module first locks the light source assembly to the back frame with screws. Then, insert the light guide plate into the corresponding groove in the back frame. However, the light guide plate fixed by the insertion means is inferior in fixability, and thus the chance of the light guide plate being loosened is high. In addition, the inserted light guide plate is also easy to rub against the back frame, and the light guide plate is damaged and an abnormal sound is emitted.

In addition, the light guide plate can also be glued to the back frame. However, in addition to increasing the cost of the glue, this method also requires an increased assembly man-hour. In addition, the light guide plate fixed by the adhesive is also easily rubbed against the lamp housing of the light source assembly to generate an abnormal sound.

The invention relates to a backlight module, a display device and an assembly method thereof. The light guide plate and the protective cover are simultaneously fixed on the back frame by screws, so as to increase the fixing property of the light guide plate and reduce the product cost.

According to a first aspect of the present invention, a method for assembling a backlight module is provided, comprising the following steps. Providing a back frame, the back frame has a groove and at least one locking hole, the locking hole is located in the groove; a light source component is disposed on the back frame; a light guide plate is disposed on the back frame, and the light guide plate has a convexity And a first through hole, the protruding portion protrudes from the edge of the light guide plate, and the first through hole is disposed in the protruding portion, wherein the protruding portion of the light guide plate is disposed in the groove of the back frame, and the first portion The perforation system corresponds to the locking hole; the protective cover is disposed on the light guide plate and the light source assembly, the protection cover has a second through hole, and the second through hole corresponds to the first through hole; and the second through hole is inserted into the second through hole The through hole, the first through hole and the locking hole are locked to the locking hole, so that the protective cover, the light source assembly and the light guide plate are fixed on the back frame.

According to a second aspect of the present invention, a backlight module is provided. The backlight module includes a back frame, a light guide plate, a light source assembly, a protection frame and at least one screw. The back frame has a groove and at least one locking hole, and the locking hole is located in the groove. The light source component is disposed on the back frame. The light guide plate is disposed on the back frame, and the light guide plate has a protruding portion and at least one first through hole. The protruding portion protrudes from the edge of the light guide plate, and the first through hole is disposed in the protruding portion, wherein the protruding portion of the light guide plate is disposed in the groove of the back frame, and the first through hole corresponds to the locking hole. The protective cover covers the light guide plate and the light source assembly, the protective cover has at least one second through hole, and the second through hole is disposed corresponding to the first through hole. The screw is inserted into the second through hole and the first through hole, and is locked in the locking hole of the back frame, so that the protective cover, the light source assembly and the light guide plate are fixed on the back frame.

According to a third aspect of the present invention, an assembly device for a display device is provided law. The assembly method of the display device includes the following steps. A back frame is provided, the back frame has a groove and at least one locking hole, and the locking hole is located in the groove. A light source assembly is disposed on the back frame. A light guide plate is disposed on the back frame, the light guide plate has a protruding portion and a first through hole, the protruding portion protrudes from the edge of the light guide plate, and the first through hole is disposed at the protruding portion, wherein the light guide plate is convex The outlet portion is disposed in the groove of the back frame, and the first through hole corresponds to the locking hole. Covering a protective cover on the light guide plate and the light source assembly, the protective cover has a second through hole, and the second through hole corresponds to the first through hole. The second through hole, the first through hole and the locking hole are inserted into the locking hole by a screw, and the protective cover, the light source assembly and the light guide plate are fixed on the back frame to be combined into a backlight module. A display panel is disposed on the backlight module.

According to a fourth aspect of the invention, a display device is provided. The display device includes a backlight module and a display panel. The backlight module includes a back frame, a light source assembly, a light guide plate, a protective cover and at least one screw. The back frame has a groove and at least one locking hole. The locking hole is located in the groove. The light source assembly is disposed on the back frame. The light guide plate is disposed on the back frame, and the light guide plate has a protruding portion and at least one first through hole. The protruding portion protrudes from the edge of the light guide plate, and the first through hole is disposed in the protruding portion, wherein the protruding portion of the light guide plate is disposed in the groove of the back frame, and the first through hole corresponds to the locking hole . The protective cover covers the light guide plate and the light source assembly, the protective cover has at least one second through hole, and the second through hole is disposed corresponding to the first through hole. The screw is inserted into the second through hole and the first through hole, and is locked in the locking hole of the back frame, so that the protective cover, the light source assembly and the light guide plate are fixed on the back frame. The display panel is disposed on the backlight module.

In order to make the above-mentioned contents of the present invention more comprehensible, the preferred embodiments are described below, and the detailed description is as follows:

Several embodiments are set forth below as illustrative of the invention. However, the method steps and structures set forth in the above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Further, elements that are not necessary in the embodiment have been omitted in the drawings in order to clearly show the technical features of the present invention.

First embodiment

Please refer to both Figure 1 and Figure 2. 1 is a top view of a backlight module 100 according to a first embodiment of the present invention, and FIG. 2 is an exploded view of the backlight module 100 of FIG. 1. As shown in FIG. 1 , the backlight module 100 includes a back frame 110 , a light source assembly 120 , a light guide plate 130 , a protective cover 140 , and at least one screw 150 . As shown in FIG. 2, the back frame 110 has at least one locking hole 110a. The light source assembly 120 is disposed on the back frame 110. The light source assembly 120 includes a light source 122 and a light frame 124. (The light source assembly 120 is shown in FIG. 4, and FIG. 2 only shows the light frame 124 of the light source assembly 120.) . The light guide plate 130 is disposed on the back frame 110, and the light guide plate 130 has at least one first through hole 130a, and the first through hole 130a corresponds to the locking hole 110a. The protective cover 140 is disposed on the light guide plate 130 and the light source assembly 120. The protective cover 140 has at least one second through hole 140a, and the second through hole 140a is disposed corresponding to the first through hole 130a.

Next, the assembly side of the backlight module 100 of the present embodiment will be further described. 3, and FIG. 4, FIG. 3 is a flow chart showing a method for assembling the backlight module 100 according to the preferred embodiment of the present invention, and FIG. 4 is a diagram showing the backlight module 100 of FIG. A section along section line 4-4'.

First, as shown in FIG. 4, in step 301, a back frame 110 is provided. Please refer to FIG. 5A at the same time, which shows a partial enlarged view of the back frame 110 and the light guide plate 130 according to FIG. 2 . As shown in FIG. 5A, the back frame 110 has a recess 110h, and the locking hole 110a of the back frame 110 is disposed at the bottom of the recess 110h. As shown in Fig. 4, the wall of the hole of the locking hole 110a is screwed with the screw 150 so that the screw 150 can be tightly fitted in the locking hole 110a.

Then, as shown in FIG. 4 and FIG. 5B, FIG. 5B is a partial enlarged view of the lamp holder 124 and the protective cover 140 of FIG. In step 302, the light source assembly 120 is disposed on the back frame 110. The light source 122 is disposed on the back frame 110, and the light frame 124 covers the light source 122 and the back frame 110. In the embodiment, in order to increase the fixing between the lamp holder 124 and the back frame 110, a first sleeve hole 124a is preferably disposed on the lamp holder 124. In this way, the lamp holder 124 can be sleeved on the bump 110t of the back frame 110 by the first sleeve hole 124a.

Next, as shown in FIG. 4, in step 303, the light guide plate 130 is disposed on the back frame 110, and the first through hole 130a of the light guide plate 130 corresponds to the locking hole 110a. As shown in FIG. 5A, the light guide plate 130 preferably has a protruding portion 130h, and the protruding portion 130h protrudes from the edge of the light guide plate 130, and the first through hole 130a is disposed on the protruding portion 130h. When the light guide plate 130 is disposed on the back frame 110, the protruding portion 130h of the light guide plate 130 The first through hole 130a of the light guide plate 130 is in communication with the locking hole 110a. As shown in FIG. 4, the depth h2 of the recess 110h of the embodiment is substantially equal to the thickness h1 of the light guide plate 130 and the thickness h0 of the protruding portion. Therefore, the protruding portion 130h of the light guide plate 130 is disposed on the back frame. In the groove 110h of the 110, the total thickness of the entire backlight module 110 can be effectively reduced; moreover, as shown in FIG. 5C, another embodiment according to FIG. 5A is illustrated. In another embodiment, the thickness h0 of the protrusion 130h and the thickness h1 of the light guide plate 130 may not be equal, and the actual needs of the end view design may be appropriately changed.

Then, as shown in FIG. 4 and FIG. 5B, in step 304, the protective cover 140 is covered on the light guide plate 130 and the light source assembly 120, and the second through hole 140a of the protective cover 140 is disposed corresponding to the first through hole 130a. . In this embodiment, the protective cover 140 preferably further defines a second sleeve hole 140b corresponding to the protrusion 110t of the back frame 110. Therefore, when the protective cover 140 covers the light guide plate 130 and the lamp holder 124, the second through hole 140a communicates with the first through hole 130a, and the second set hole 140b is also sleeved on the bump 110t.

Next, as shown in FIG. 4, in step 305, the second through hole 140a, the first through hole 130a and the locking hole 110a are inserted into the locking hole 110a by a screw 150, so as to be the protective cover 140. The light source assembly 120 and the light guide plate 130 are fixed to the back frame 110. In the embodiment, the screw 150 includes an abutting portion 154 and a cylindrical portion 152. The diameter d1 of the abutting portion 154 is larger than the diameter d2 of the second through hole 140a and the first through hole 130a, and the diameter d3 of the cylindrical portion 152 is smaller than the diameter d2 of the second through hole 140a and the first The diameter d2 of the through hole 130a. In this way, the pillar portion 152 does not come into contact with the light guide plate 130, so that the light guide plate 130 is not damaged during the locking process of the screw 150.

Moreover, the length h4 of the pillar portion 152 of the embodiment is substantially greater than the thickness h1 of the light guide plate 130 and the thickness h3 of the protective cover 140, so that the screw 150 can be inserted into the protective cover 140 and the light guide plate 130, and the back The locking hole 110a of the frame 110 is locked.

In addition, the length h4 of the pillar portion 152 is substantially smaller than the thickness h1 of the light guide plate 130, the thickness h3 of the protective cover 140, and the depth h5 of the locking hole 110a, so that the abutting portion 154 can abut against the protective cover 140. The protective cover 140 is fixed to the back frame 110 by the screw 150, and the light guide plate 130 can also be fixed by the protection cover 140 and the back frame 110.

In this way, the light guide plate 130 can be tightly fixed to the back frame 110, and is not easily released from the back frame 110. Therefore, the light guide plate 130 does not rub against the back frame 110 to damage the light guide plate 130 and emit an abnormal sound. Furthermore, the light guide plate 130 and the light source assembly 120 can be fixed to the back frame 110 by the same screw 150 at the same time, which can reduce the product cost and reduce the assembly man-hour.

Second embodiment

Referring to FIG. 6, a top view of a backlight module 200 according to a second embodiment of the present invention is shown. The second embodiment is different from the first embodiment in the number of the protective covers 240 and the number and arrangement positions of the corresponding locking holes 210a, and the rest of the same points will not be repeated.

In this embodiment, the two light source components 220 are respectively disposed on the back frame. The two sides of the back frame 210 and the four corners of the back frame 210 fix the light guide plate 230, the protective cover 240 and the light source assembly 220 on the back frame 210 by the method of the first embodiment.

In the backlight module, the display device and the assembling method thereof disclosed in the above embodiments of the present invention, the protective cover, the light guide plate and the light source assembly are simultaneously fixed to the back frame by screws. In this way, not only can the fixing of the light guide plate and the back frame be increased, but the light guide plate is not easily loosened from the back frame, and the light guide plate and the back frame can be prevented from being rubbed to damage the light guide plate and emit abnormal sound. In addition, the light guide plate and the light source assembly can be fixed to the back frame by the same screw at the same time, which can reduce the product cost and reduce the assembly man-hour.

In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. A person skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

100, 200‧‧‧ backlight module

110, 210‧‧‧ Back frame

110a‧‧‧Lock hole

110h‧‧‧ Groove

110t‧‧‧bump

120, 220‧‧‧Light source components

122‧‧‧Light source

124‧‧‧Light stand

124a‧‧‧First set of holes

130, 230‧‧‧Light guide plate

130a‧‧‧first through hole

130h‧‧‧protrusion

140, 240‧‧‧ protective cover

140a‧‧‧second through hole

140b‧‧‧Second set of holes

150‧‧‧ screws

152‧‧‧Cylinder Department

154‧‧‧Affiliation

H0‧‧‧ Thickness of the projection

H1‧‧‧ thickness of light guide plate

H2‧‧‧Deep depth

h3‧‧‧The thickness of the protective cover

H4‧‧‧The length of the cylinder

h5‧‧‧Deep depth of the locking hole

D1‧‧‧diameter of the abutment

D2‧‧‧ diameter of the first and second through holes

D3‧‧‧diameter of the cylinder

1 is a top view of a backlight module according to a first embodiment of the present invention; FIG. 2 is an exploded view of the backlight module of FIG. 1 , and FIG. 3 is a perspective view of a backlight module according to a preferred embodiment of the present invention; FIG. 4 is a cross-sectional view of the backlight module along the section line 4-4′ in FIG. 1; FIG. 5A is a partial enlarged view of the back frame and the light guide plate in FIG. 2; 5B is a partial enlarged view of the lamp holder and the protective cover in FIG. 2; FIG. 5C is a view showing another embodiment according to FIG. 5A; and FIG. 6 is a second embodiment of the present invention; Top view of the backlight module.

100‧‧‧Backlight module

110‧‧‧ Back frame

110a‧‧‧Lock hole

110h‧‧‧ Groove

120‧‧‧Light source components

124‧‧‧Light stand

124a‧‧‧First set of holes

130‧‧‧Light guide plate

130a‧‧‧first through hole

130h‧‧‧protrusion

140‧‧‧ protective cover

140a‧‧‧second through hole

150‧‧‧ screws

Claims (29)

A method for assembling a backlight module, comprising: providing a back frame, wherein the back frame has a groove and at least one locking hole, wherein the locking hole is located in the groove; and a light source component is disposed on the back frame; a light guide plate is disposed on the back frame, the light guide plate has a protruding portion and a first through hole, the protruding portion protrudes from an edge of the light guide plate, and the first through hole is disposed at the protruding portion. The protruding portion of the light guide plate is disposed in the recess of the back frame, and the first through hole corresponds to the locking hole; covering a protective cover on the light guide plate and the light source assembly, The protective cover has a second through hole, and the second through hole corresponds to the first through hole; and the second through hole of the protective cover, the first through hole of the light guide plate and the first through hole are sequentially inserted into the protective cover with a screw The locking hole of the back frame is locked to the locking hole, so that the protective cover, the light source assembly and the light guide plate are fixed on the back frame, wherein the screw comprises an abutting portion and a cylinder The length of the cylindrical portion is substantially greater than the thickness of the light guide plate and the thickness of the protective cover . The method of assembling a backlight module according to claim 1, wherein the thickness of the protrusion is substantially equal to the thickness of the light guide plate. The method of assembling a backlight module according to claim 1, wherein the thickness of the protruding portion is substantially smaller than the thickness of the light guide plate. The method of assembling a backlight module according to claim 1, wherein in the step of disposing the light source assembly, the light source assembly comprises A light source and a light stand. The method for assembling a backlight module according to claim 1, wherein the step of disposing the light source assembly, the step of setting the light guide plate, the step of covering the protective cover, and the step of locking are in sequence carried out. The method of assembling a backlight module according to claim 1, wherein in the step of locking, the diameter of the abutting portion is larger than a diameter of the second through hole and a diameter of the first through hole, The diameter of the cylindrical portion is smaller than the diameter of the second through hole and the diameter of the first through hole. A backlight module includes: a back frame having a recess and at least one locking hole, wherein the locking hole is located in the recess; a light source assembly is disposed on the back frame; and a light guide plate is disposed on the The light guide plate has a protruding portion and at least one first through hole protruding from an edge of the light guide plate, wherein the first through hole is disposed in the protruding portion, wherein the light guide plate is disposed on the back frame The protruding portion is disposed in the recess of the back frame, and the first through hole corresponds to the locking hole; a protective cover covers the light guide plate and the light source assembly, the protective cover has At least one second through hole, and the second through hole is disposed corresponding to the first through hole; and at least one screw includes an abutting portion and a cylindrical portion, and the screw is sequentially inserted into the protective cover a second through hole and the first through hole of the light guide plate, and is locked in the locking hole of the back frame, so that the protective cover, The light source assembly and the light guide plate are fixed on the back frame, wherein the length of the cylindrical portion is substantially greater than the sum of the thickness of the light guide plate and the thickness of the protective cover. The backlight module of claim 7, wherein the thickness of the protrusion is substantially equal to the thickness of the light guide plate. The backlight module of claim 7, wherein the thickness of the protrusion is substantially smaller than the thickness of the light guide plate. The backlight module of claim 7, wherein the diameter of the abutting portion is larger than the diameter of the second through hole and the diameter of the first through hole, and the diameter of the cylindrical portion is smaller than the second through hole The diameter and the diameter of the first through hole. The backlight module of claim 10, wherein the length of the pillar portion is substantially smaller than a sum of a thickness of the light guide plate, a thickness of the protective cover, and a depth of the locking hole. The backlight module of claim 7, wherein the back frame further has a recess, and the light guide plate has a protruding portion protruding from an edge of the light guide plate, the first The protruding portion is disposed in the protruding portion, and the protruding portion of the light guiding plate is disposed in the groove of the back frame. The backlight module of claim 12, wherein the depth of the groove is substantially equal to the thickness of the light guide plate. The backlight module of claim 12, wherein the locking hole is disposed at a bottom of the groove. The backlight module of claim 7, wherein the back frame has a plurality of locking holes, the light guiding plate has a plurality of first through holes, and the protective cover has a plurality of second through holes, the backlight module Group includes complex And a plurality of screws, each of the screws is inserted into each of the corresponding second through holes and each of the first through holes, and is locked in the corresponding one of the locking holes. A method for assembling a display device, comprising: providing a back frame, the back frame having a groove and at least one locking hole, wherein the locking hole is located in the groove; and a light source assembly is disposed on the back frame; The light guide plate is disposed on the back frame, the light guide plate has a protruding portion and a first through hole, and the protruding portion protrudes from an edge of the light guide plate, wherein the first through hole is disposed in the protruding portion, wherein the light guiding plate has a protruding portion and a first through hole The protruding portion of the light guide plate is disposed in the recess of the back frame, and the first through hole corresponds to the locking hole; covering a protective cover on the light guide plate and the light source assembly, the protection The cover has a second through hole, and the second through hole corresponds to the first through hole; the second through hole of the protective cover, the first through hole of the light guide plate and the back are sequentially inserted by a screw The locking hole of the frame is locked to the locking hole of the back frame, so that the protective cover, the light source assembly and the light guide plate are fixed on the back frame to be combined into a backlight module, wherein the screw comprises An abutting portion and a cylindrical portion, the length of the cylindrical portion being substantially larger than the light guide plate Thickness of the protective cover and the sum; and a display panel disposed on the backlight module on. The method of assembling a display device according to claim 16, wherein the thickness of the protruding portion is substantially smaller than the thickness of the light guide plate. The method of assembling a display device according to claim 16, wherein in the step of disposing the light source assembly, the light source assembly comprises a light source and a light stand. The method of assembling a display device according to claim 16, wherein the step of disposing the light source assembly, the step of setting the light guide plate, the step of covering the protective cover, and the step of locking are performed in sequence . The method of assembling a display device according to claim 16, wherein in the step of locking, the diameter of the abutting portion is larger than a diameter of the second through hole and a diameter of the first through hole, the column The diameter of the body is smaller than the diameter of the second through hole and the diameter of the first through hole. A display device includes: a backlight module, comprising: a back frame having a recess and at least one locking hole, wherein the locking hole is located in the recess; a light source assembly is disposed on the back frame; a light guide plate is disposed on the back frame, and the light guide plate has a protruding portion and at least one first through hole, the protruding portion protrudes from an edge of the light guide plate, and the first through hole is disposed on the convex portion And the protruding portion of the light guide plate is disposed in the recess of the back frame, and the first through hole corresponds to the locking hole; a protective cover covers the light guide plate and the light source The protective cover has at least one second through hole, and the second through hole is disposed corresponding to the first through hole; The at least one screw includes an abutting portion and a cylindrical portion, and the screw is sequentially inserted into the second through hole of the protective cover and the first through hole of the light guide plate, and is locked to the back frame The locking hole, the light source assembly and the light guide plate are fixed on the back frame, wherein the length of the cylindrical portion is substantially greater than the thickness of the light guide plate and the thickness of the protective cover; And a display panel disposed on the backlight module. The display device of claim 21, wherein the thickness of the protrusion is substantially equal to the thickness of the light guide plate. The display device of claim 21, wherein the thickness of the protrusion is substantially smaller than the thickness of the light guide plate. The display device of claim 21, wherein the diameter of the abutting portion is larger than the diameter of the second through hole and the diameter of the first through hole, and the diameter of the cylindrical portion is smaller than the diameter of the second through hole The diameter and the diameter of the first through hole. The display device of claim 21, wherein the length of the cylindrical portion is substantially smaller than a thickness of the light guide plate, a thickness of the protective cover, and a depth of the locking hole. The display device of claim 21, wherein the back frame further has a recess, and the light guide plate has a protrusion protruding from an edge of the light guide plate, the first The through hole is disposed in the protruding portion, and the protruding portion of the light guide plate is disposed in the groove of the back frame. The display device of claim 26, wherein the depth of the groove is substantially equal to the thickness of the light guide plate. The display device of claim 26, wherein the locking hole is disposed at a bottom of the groove. The display device of claim 21, wherein the back frame has a plurality of locking holes, the light guide plate has a plurality of first through holes, and the protective cover has a plurality of second through holes, the backlight module The plurality of screws are inserted into the corresponding second through holes and the first through holes, and are locked in the corresponding locking holes.