CN216870979U

CN216870979U - Backlight module casing

Info

Publication number: CN216870979U
Application number: CN202220735826.2U
Authority: CN
Inventors: 欧士铭
Original assignee: AU Optronics Corp
Current assignee: AU Optronics Corp
Priority date: 2021-11-26
Filing date: 2022-03-31
Publication date: 2022-07-01
Anticipated expiration: 2032-03-31
Also published as: TWM624216U

Abstract

The utility model provides a backlight module shell. The backlight module shell comprises a back plate and a frame piece. The back plate comprises a back plate body, a back plate side wall and a clamping piece. The side wall of the back plate extends out from the edge of the back plate body to the direction far away from the back plate body. The clamping piece extends outwards from the top end of the side wall of the back plate. The frame piece is arranged opposite to the back plate and comprises a frame piece body, a frame piece side wall and a clamping part. The frame body is opposite to the back plate body. The frame side wall extends out from the edge of the frame body to the direction far away from the frame body and is positioned at the outer side of the back plate side wall. The clamping part is arranged on the side wall of the frame piece and clamped with the clamping piece.

Description

Backlight module casing

Technical Field

The utility model relates to a backlight module shell.

Background

The liquid crystal display has a small thickness, a light weight, and a convenient portability, and has an advantage of low radiation compared to a CRT display, so that the demand in recent years is rapidly increasing. Especially for large-sized machines, in order to achieve differentiation and reduce manufacturing cost to reduce selling price, a direct type lamp source design is generally adopted, and the thickness is properly widened to reduce the number of lamp sources or optical films. However, narrow-frame models are currently the mainstream in the market, and even in low-cost models, it is desirable to achieve a narrow frame to promote sales.

The backlight module is one of the main components of the lcd, and its structure has a key influence on whether the lcd can achieve a narrow frame. In a conventional backlight module, a rivet is driven into a housing through a sidewall of a back plate to fix the back plate to a frame member, and further to clamp and fix a panel and an optical film. The method has the defects of light leakage caused by broken holes, easy dust invasion, necessity of additionally using an outer frame as an appearance piece and the like. Another common way is to form a hook on the sidewall of the back plate in a protruding manner for fixing the adhesive tape and the frame. In this way, in order to form the hook with sufficient mechanical strength, the sidewall of the back plate needs to have a certain thickness (for example, more than 1 mm), which is not favorable for reducing the overall thickness of the back plate to save the cost. The backlight module shell has room for improvement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a backlight module shell, which can reduce the frame thickness of a display using the backlight module shell.

Another objective of the present invention is to provide a backlight module casing, which can reduce light leakage.

Another object of the present invention is to provide a backlight module casing, which can reduce the thickness of the backlight module casing.

Another object of the present invention is to provide a backlight module casing, which can be used as an appearance member of a display using the backlight module casing, and reduce the number of parts.

The backlight module shell comprises a back plate and a frame piece. The back plate comprises a back plate body, a back plate side wall and a clamping piece. The side wall of the back plate extends out from the edge of the back plate body to the direction far away from the back plate body. The clamping piece extends outwards from the top end of the side wall of the back plate. The frame piece is arranged opposite to the back plate and comprises a frame piece body, a frame piece side wall and a clamping part. The frame body is opposite to the back plate body. The frame side wall extends out from the edge of the frame body to the direction far away from the frame body and is positioned at the outer side of the back plate side wall. The clamping part is arranged on the side wall of the frame piece and clamped with the clamping piece.

According to one embodiment of the present invention, the back plate further comprises a positioning member disposed at a position other than the engaging member at the top end of the side wall of the back plate; the frame further comprises a positioning part which is arranged at the position of the frame body close to the side wall of the frame and is clamped with the positioning part.

According to one embodiment of the present invention, the positioning member includes a protruding portion protruding toward the frame member, and the positioning portion includes a recessed portion having a shape corresponding to the positioning member and recessed toward the interior of the frame member body.

According to one embodiment of the present invention, the engaging member is disconnected from the top end of the back plate sidewall except for the portion connected to the top end of the back plate sidewall.

According to one embodiment of the present invention, the engaging member is a flap that forms an angle of 90 ° with the sidewall of the back panel and is bent from the top end of the sidewall of the back panel.

According to one embodiment of the present invention, the engaging member is a flap overlapping with the sidewall of the back panel.

According to one embodiment of the present invention, a protruding structure is further included between the engaging member and the sidewall of the back plate.

According to one embodiment of the present invention, the engaging member comprises: the first folding piece is formed by reversely folding the top end of the side wall of the back plate and is overlapped with the side wall of the back plate; and a second folded sheet which is formed by bending outwards from the other end connected with the top end of the side wall of the back panel and the first folded sheet, and forms an included angle of 90 degrees with the first folded sheet, and the clamping piece is clamped with the clamping part through the second folded sheet.

According to one embodiment of the present invention, the protruding distance of the engaging member from the outer side of the sidewall of the back plate is 0.4mm to 0.6 mm.

According to one embodiment of the present invention, the engaging portion is a concave portion.

According to one embodiment of the present invention, the engaging portion is a hole.

According to one embodiment of the present invention, the frame further includes an inner wall extending from the frame body in a direction away from the frame body and located on the other side of the back plate sidewall opposite to the frame sidewall.

According to one embodiment of the present invention, the backlight module casing is used for a display device, and the frame member is disposed at an outermost side of the display device.

The optical module shell has the beneficial effects that the optical module shell comprises the back plate and the frame piece. The backboard comprises a backboard body, a backboard side wall and a clamping piece, wherein the backboard side wall extends out from the edge of the backboard body to the direction far away from the backboard body, the clamping piece extends outwards from the top end of the backboard side wall, the frame piece is arranged opposite to the backboard and comprises a frame piece body, a frame piece side wall and a clamping part, and the frame piece body is opposite to the backboard body. The frame piece accessible reduces broken hole and prevents the light leak and avoid the dust invasion.

Drawings

Fig. 1 is an exploded view of a backlight module housing according to an embodiment of the utility model.

Fig. 2 is a schematic view of an embodiment of a backlight module housing according to the utility model.

Fig. 3A is a schematic cross-sectional view of a backlight module housing according to an embodiment of the utility model.

FIG. 3B is a cross-sectional view of a backlight module housing according to another embodiment of the present invention.

Fig. 4A is a schematic view of an embodiment of the engaging member engaging with the engaging portion in the backlight module housing according to the utility model.

Fig. 4B to 7B are schematic diagrams of different embodiments of the fastening member and the fastening portion in the backlight module housing according to the utility model.

FIG. 8 is a schematic view of an embodiment of the backlight module casing further comprising a convex structure between the engaging member and the sidewall of the back plate.

The reference numbers are as follows:

a back plate

A back plate body

A back plate sidewall

End of 120a

130

A first flap

End of 131a

132

End 133

Positioning member

160

200

A frame body

A frame member side wall

230

Positioning part

250

800

X

Y

Z

Detailed Description

The advantages and effects of the present invention will be understood by those skilled in the art from the disclosure of the present specification, which is described below with reference to specific embodiments and accompanying drawings. However, the following disclosure is not intended to limit the scope of the utility model, and those skilled in the art can implement the utility model in other different embodiments based on different viewpoints and applications without departing from the spirit of the present invention. In the drawings, the thickness of layers, films, panels, regions, etc. have been exaggerated for clarity. Like reference numerals refer to like elements throughout the specification. It will be understood that when an element such as a layer, film, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connections. Further, "electrically connected" or "coupled" may mean that there are additional elements between the elements.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a "first element," "component," "region," "layer" or "portion" discussed below could be termed a second element, component, region, layer or portion without departing from the teachings herein.

Furthermore, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used herein to describe one element's relationship to another element, as illustrated. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "lower" can encompass both an orientation of "lower" and "upper," depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as "below" or "beneath" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "beneath" can encompass both an orientation of above and below.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable range of deviation of the specified value as determined by one of ordinary skill in the art, taking into account the measurement in question and the specified amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" may mean within one or more standard deviations of the stated value, or within ± 30%, ± 20%, ± 10%, ± 5%. Further, as used herein, "about", "approximately" or "substantially" may be selected based on optical properties, etch properties, or other properties, with a more acceptable range of deviation or standard deviation, and not all properties may be applied with one standard deviation.

As shown in the exploded view of fig. 1, the backlight module housing 800 of the present invention includes a back plate 100 and a frame member 200. The backplate 100 includes a backplate body 110, backplate sidewalls 120, and engaging members 130. The back plate sidewall 120 extends from the edge of the back plate body 110 to a direction away from the back plate body 110, i.e. extends upward along the Z-axis direction shown in fig. 1. The engaging member 130 is formed to extend outward from the top end 120A of the back plate sidewall 120, i.e., extends outward along the X-axis direction shown in fig. 1. Specifically, in an embodiment, the back plate body 110 is a metal sheet, and the edge of the back plate body 110 is bent upwards to form the back plate sidewall 120 by using a metal plate folding or winding method, and then the opposite end of the back plate sidewall 120 connected to the back plate body 110 is bent outwards to form the engaging member 130. Accordingly, the engaging piece 130 is disconnected from the back plate sidewall 120 except for the portion connected to the top end 120A of the back plate sidewall 120. Viewed from different angles, there is a gap between the engaging member 130 and the sidewall 120 of the back plate. The engaging member 130 may be disposed on each or a portion of the back plate sidewall 120 as required. Viewed from different angles, the back plate sidewall 120 surrounds and stands on the edge of the back plate body 110, and forms a concave portion together with the back plate body 110 for accommodating display devices such as a display panel, an optical film, a liquid crystal module, and a light source module.

As shown in the exploded view of fig. 1, the frame 200 is opposite to the backplate body 110, for example, disposed above the backplate 100, and includes a frame body 210, a frame sidewall 220 and a locking portion 230. The frame body 210 is located above the backplate 100. The frame sidewall 220 extends from the edge of the frame body 210 away from the frame body 210, i.e., downward along the Z-axis as shown in fig. 1. The engaging portion 230 is disposed on the frame sidewall 220. Specifically, in one embodiment, the frame 200 is a plastic injection member, and the frame body 210, the frame sidewall 220 and the engaging portion 230 are integrally formed. The engaging portion 230 may be disposed on each or a portion of the frame sidewall 220 as required. Viewed from different angles, the frame sidewall 220 surrounds and stands on the edge of the frame body 210, and forms an inner recess together with the frame body 210 for accommodating the aforementioned display device and at least a portion of the back plate 100.

Further, as shown in fig. 2, in the backlight module housing 800 of the present invention, the frame member 200 can be sleeved outside the back plate 100, that is, the frame member 200 and the back plate 100 can move along the Z-axis direction shown in fig. 2 to be sleeved. When the frame 200 is engaged with the backplate 100, the frame sidewall 220 is located outside the backplate sidewall 120, the engaging portion 230 engages with the engaging member 130, the movement of the frame 200 and the backplate 100 along the XY plane is restricted by the engagement therebetween, and the movement of the frame 200 and the backplate 100 along the Z-axis direction is restricted by the engagement between the engaging portion 230 and the engaging member 130. Accordingly, the back plate 100 can be fastened and fixed with the frame member 200 without using a rivet or other elements, and the frame thickness of a display using the backlight module casing 800 can be reduced. In addition, the thickness of the engaging member 130 formed by extending from the sidewall 120 of the back plate can be thinner, for example, as thin as about 0.4mm, compared to the conventional hook formed by protruding the back plate. In other words, the backlight module casing 800 of the present invention can use the back plate 100 with a thinner thickness to save cost.

On the other hand, as shown in fig. 3A, the cross section AA' in fig. 2 further includes a positioning member 140 disposed at a position other than the engaging member 130 of the top end 120A of the back plate sidewall 120 of the back plate 100 to reduce the movement of the back plate 100 and the frame member 200 in the Y direction and to stabilize the engagement therebetween. The frame 200 further includes a positioning portion 240 disposed at the bottom of the frame body 210 and engaged with the positioning member 140. Accordingly, the movement of the frame member 200 and the back plate 100 in the Y-axis direction is further restricted. In the embodiment shown in fig. 3A, the positioning element 140 is a convex block protruding toward the frame element 200, and the positioning portion 240 is a concave portion recessed into the frame element body 210 and corresponding in shape. However, in different embodiments, the positioning element 140 and the positioning portion 240 may be changed according to different requirements to achieve the positioning and fastening effect. In a different embodiment shown in fig. 3B, the positioning element 140 is a slot and the positioning element 240 is a rib.

In different embodiments, the engaging member 130 can be varied according to the design, manufacture or use requirements. As shown in fig. 2 and fig. 4A, the engaging member 130 is a flap having an angle of 90 ° with the sidewall 120 of the back panel. The distance between the engaging member 130 and the outer side of the back panel sidewall 120 is preferably 0.4mm to 0.6mm, so as to obtain a better engaging effect and prevent the frame member 200 from separating from the back panel 100. On the other hand, as shown in the embodiment of fig. 4B, the engaging portion 230 is a broken hole, and the frame 200 further includes an inner wall 250 extending downward from the frame body 210 and located on the other side of the back-plate sidewall 120 opposite to the frame sidewall 220. In other words, the top end 120A of the back plate sidewall 120 is sandwiched between the inner wall 250 and the frame sidewall 220. Therefore, light leakage caused by light emitted from a light source (not shown) disposed inside the sidewall 120 of the backplate from the engaging portion 230 can be reduced, dust intrusion can be avoided, and the tightness of the engagement between the engaging member 130 and the engaging portion 230 can be increased. On the other hand, as shown in the embodiment of fig. 4A and 4B, the inner side of the frame sidewall 220 may protrude inward to abut against the back plate sidewall 120, and further forms a slope for guiding the engaging member 130 into the engaging portion 230.

In the embodiment shown in fig. 5A and 5B, the engaging member 130 is a flap overlapped with the back panel sidewall 120. More specifically, in one embodiment, the engaging member 130 includes a first flap 131 and a second flap 132. The first flap 131 is formed by folding back, i.e. bending outward and downward, the top end 120 of the back panel sidewall 120 and overlaps with the back panel sidewall 120. In other words, the first flap 131 and the back panel sidewall 120 are parallel to each other. The second flap 132 is formed by bending outward the other end 131A of the first flap 131 connected to the top end 120A of the sidewall 120 of the back panel, and forms an included angle of 90 ° with the first flap 131. The engaging member 130 is engaged with the engaging portion 230 via the second flap 132. Further, since the inner side of the second flap 132 is substantially covered by the first flap 131, light leakage caused by light emitted from a light source (not shown) disposed inside the sidewall 120 of the back panel from the engaging portion 230 can be reduced, thereby preventing dust from entering. The inner side of the frame sidewall 220 can be partially retracted to accommodate the first flap 131. In addition, as shown in fig. 5B, the frame 200 may also be provided with an inner wall 250, such that the first flap 131 and the back-panel sidewall 120 are sandwiched between the inner wall 250 and the frame sidewall 220, thereby securing the back-panel 100 and the frame 200. In one embodiment, as shown in fig. 5A and 5B, the inner side of the frame sidewall 220 can protrude inward to abut against the back panel sidewall 120, and a slope can be further formed to guide the second flap 132 into the engaging portion 230.

In various embodiments, the frame member 200 can prevent light leakage and dust intrusion by reducing the number of holes. As shown in fig. 6A and 6B, the engaging portion 230 is a concave portion, and the engaging member 130 is engaged with the engaging portion 230 via the second flap 132. Further, the second flap 132 extends into the engaging portion 230 formed as a recess without passing through the frame sidewall 220. Since the frame sidewall 220 has no broken hole, light leakage caused by light emitted from a light source (not shown) disposed inside the back plate sidewall 120 through the frame sidewall 220 can be reduced, thereby preventing dust intrusion. In addition, as shown in fig. 6B, the frame 200 may also be provided with an inner wall 250 to make the engagement between the back plate 100 and the frame 200 more stable.

In the embodiment shown in fig. 7A and 7B, the engaging member 130 is bent outward and downward from the top end 120 of the back plate sidewall 120 and overlaps with the back plate sidewall 120. The engaging portion 230 is a flange formed inward inside the frame sidewall 220 and can abut against the other end 133 of the first flap 131 connected to the top end 120A of the back panel sidewall 120. Thus, the engaging piece 130 can engage with the engaging portion 230. In addition, as shown in fig. 7B, the frame 200 may also be provided with an inner wall 250 to make the engagement between the back plate 100 and the frame 200 more stable.

Further, in the embodiment shown in fig. 6A to 7B, the frame sidewall 220 does not form a broken hole due to the arrangement of the engaging portion 230, and the integrity of the outer surface is not affected. Therefore, when the backlight module casing 800 is used for a display device, the casing can be arranged at the outermost side of the display device and also used as an appearance piece, and the appearance piece does not need to be arranged additionally, so that the number of parts can be reduced. In addition, since the thickness of the engaging member 130 formed by extending from the back plate sidewall 120 can be thinner, the depth of the concave portion formed as the engaging portion 230 on the frame sidewall 220 can be shallower. In other words, the frame sidewall 220 does not need to be increased in thickness to form the recess serving as the engaging portion 230, which is more advantageous for designing a narrow bezel. On the other hand, in the embodiment shown in fig. 8, in the embodiment where the engaging member 130 forms a flap to overlap with the back panel sidewall 120, a protruding structure 160 is further included between the engaging member 130 and the back panel sidewall 120, so as to engage the engaging member 130 and the back panel sidewall 120, thereby improving the deformation resistance of the engaging member 130.

The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. It must be noted that the disclosed embodiments do not limit the scope of the utility model. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A backlight module housing, comprising:

a backing plate, comprising:

a back plate body;

the backboard side wall extends out from the edge of the backboard body to the direction far away from the backboard body; and

a clamping piece formed by extending outwards from the top end of the side wall of the back plate; and

a frame disposed opposite the back plate, comprising:

a frame body opposite to the back plate body;

a frame side wall extending from the edge of the frame body in a direction away from the frame body and located outside the back plate side wall; and

a clamping part which is arranged on the side wall of the frame part and is clamped with the clamping part.

2. The backlight module casing of claim 1,

the back plate further comprises a positioning piece which is arranged at the position of the top end of the side wall of the back plate except the clamping piece;

the frame further comprises a positioning part which is arranged at the position of the frame body close to the side wall of the frame and is clamped with the positioning part.

3. The backlight module casing as claimed in claim 2, wherein the positioning member includes a protrusion protruding toward the frame member, and the positioning portion includes a recess corresponding to the positioning member and recessed toward the inside of the frame member body.

4. The backlight module casing as claimed in claim 1, wherein the engaging member is disconnected from the sidewall of the back plate except for the portion connected to the top end of the sidewall of the back plate.

5. The backlight module casing as claimed in claim 1, wherein the engaging member is a flap bent from the top of the sidewall of the back plate and having an angle of 90 ° with the sidewall of the back plate.

6. The backlight module casing of claim 1, wherein the engaging member is a flap folded with the sidewall of the back plate.

7. The backlight module casing of claim 6, wherein the engaging member and the sidewall of the back plate further comprise a convex structure therebetween.

8. The backlight module casing of claim 6, wherein the engaging member comprises:

the first folding piece is formed by reversely folding the top end of the side wall of the back plate and is overlapped with the side wall of the back plate; and

the second folding sheet is formed by bending outwards from the other end connected with the top end of the side wall of the back panel, an included angle of 90 degrees is formed between the second folding sheet and the first folding sheet, and the clamping piece is clamped with the clamping part through the second folding sheet.

9. The backlight module casing of claim 1, wherein the engaging member protrudes from the outer side of the sidewall of the back plate by a distance of 0.4mm to 0.6 mm.

10. The backlight module casing of claim 1, wherein the engaging portion is a concave portion.

11. The backlight module casing of claim 1, wherein the engaging portion is a hole.

12. The backlight module casing as claimed in claim 1, wherein the frame further comprises an inner wall extending from the frame body in a direction away from the frame body and located on the other side of the back plate sidewall opposite to the frame sidewall.

13. The backlight module casing as claimed in claim 1, wherein the backlight module casing is for a display device, and the frame member is disposed at an outermost side of the display device.