CN210123508U - Display device - Google Patents

Abstract

The utility model discloses a display device relates to electrical apparatus technical field, under the prerequisite that prevents the prism and drop, reduces the space between through-hole edge and the LED board to improve light utilization ratio, avoided the production of lamp shadow phenomenon. The display device comprises a direct type backlight module, the direct type backlight module comprises a reflector plate, a through hole is formed in the reflector plate, a light source and a prism fixedly connected with the light source are arranged in the through hole, a buffer hole is formed in the position, close to the through hole, of the reflector plate, and the buffer hole is used for enabling the edge of the through hole to be bent and deformed from a punched hole when the edge of the through hole is extruded. The utility model is used for image display.

Description

Display device

Technical Field

The utility model relates to the technical field of electrical apparatus, especially, relate to a display device.

Background

At present, most display devices in the market adopt a backlight module to realize normal display of images, and a reflector plate is an important component in the backlight module and is used for reflecting light emitted by a light source into light vertical to a screen direction. The direct type backlight module has a light source located right behind an LCD (liquid crystal display) panel, and light reflected by a reflector plate is vertically incident into a screen.

As shown in fig. 1, 2 and 3, a plurality of through holes 011 are arranged in an array on a reflective sheet 01 in a direct-type backlight module in the prior art. The LED light source module comprises a plurality of LED boards 02, a plurality of point light sources 03, a plurality of through holes 011, a prism 04 and a reflector plate 01, wherein the LED boards 02 are correspondingly arranged right below the through holes 011 in each transverse row, the point light sources 03 are in one-to-one correspondence with the through holes 011, the prism 04 is fixedly connected to each point light source 03, and the reflector plate 01 is sleeved between the prism 04 and the LED boards 02 through the through holes 011.

However, since the reflective sheet 01 expands in a high-temperature environment or contracts in a low-temperature environment, the reflective sheet 01 touches the prism 04 and generates a large force on the prism 04, so that the prism 04 falls off; therefore, when the aperture of the through hole 011 is designed, the diameter of the prism 04 is used as a reference, and the safety avoidance distance is increased to prevent the prism 04 from falling off due to the fact that the reflector 01 extrudes the prism 04. At this time, the gap between the through hole 011 and the LED board 02 is large, and the light between the through hole 011 and the LED board 02 cannot be reflected and utilized again from the bottom of the prism 04, so that the light utilization rate is low, and the lamp shadow phenomenon is generated.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a display device, under the prerequisite that prevents the prism and drop, reduce the space between through-hole edge and the LED board to improve light utilization rate, avoided the production of lamp shadow phenomenon.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

the utility model provides a display device, includes straight following formula backlight unit, straight following formula backlight unit includes the reflector plate, be equipped with the through-hole on the reflector plate, be equipped with in the through-hole light source and with light source fixed connection's prism, the reflector plate is close to the position of through-hole is equipped with the buffer hole, the buffer hole is used for making follow when the through-hole edge receives the extrusion buffer hole department produces bending deformation.

The utility model discloses display device, including straight following formula backlight unit, straight following formula backlight unit includes the reflector plate, is equipped with the through-hole on the reflector plate, be equipped with the light source in the through-hole and with light source fixed connection's prism, the position that the reflector plate is close to the through-hole is equipped with the buffer hole. In this case, when the prism is pressed by the reflector plate expanding in a high-temperature environment or contracting in a low-temperature environment, the edge of the through hole is bent and deformed from the punched hole by the buffer hole near the through hole, so that the pressing force of the reflector plate on the prism is reduced, and the prism is prevented from falling off; and simultaneously, compared with the prior art, the utility model discloses direct type backlight unit of embodiment has reduced the space between through-hole edge and the LED board to improve light utilization ratio, avoided the production of lamp shadow phenomenon.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the prior art or the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art display device;

FIG. 2 is a schematic diagram of a reflector of a direct-type backlight module of the prior art;

FIG. 3 is a schematic diagram of a partial structure at a through hole of a reflective sheet of a direct-type backlight module in the prior art;

fig. 4 is a schematic structural view of a reflective sheet with a first slit hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 5 is a schematic partial structural view of a through hole of a reflector having a linear first slit hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 6 is a schematic partial structural view of a through hole of a reflective sheet having an arc-shaped first slit hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 7 is a schematic partial structural diagram of a through hole of a reflective sheet having a circular through hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a reflective sheet with second slit holes of a direct-type backlight module according to an embodiment of the present invention;

fig. 9 is a schematic partial structural view of a through hole of a reflective sheet having a second slit hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 10 is a schematic structural view of a reflective sheet having first slit holes and third slit holes of a direct-type backlight module according to an embodiment of the present invention;

fig. 11 is a schematic partial structure diagram of a through hole of a reflective sheet having a first slit-shaped hole and a third slit-shaped hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 12 is a schematic partial structural view of a through hole of a reflective sheet having a first slit-shaped hole and a third slit-shaped hole perpendicular to an edge of the through hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 13 is a schematic partial structure diagram of a through hole of a reflective sheet having a first slit-shaped hole and a third slit-shaped hole parallel to an edge of the through hole of a direct-type backlight module according to an embodiment of the present invention;

fig. 14 is a schematic partial structure diagram of a through hole of a reflective sheet having a first slit hole and a third slit hole arranged in parallel to the edge of the through hole in an array of the direct-type backlight module according to an embodiment of the present invention.

Reference numerals:

01-a reflector plate; 011-through holes; 012-microstructure; 02-LED board; 03-a light source; 04-prism; 05-a display panel; 06-a back plate; 07-an optical module; 1-a reflective sheet; 11-a through hole; 12-a first slit-shaped aperture; 13-a second slit-shaped hole; 131-upper second slit-shaped hole; 132-lower second slot-shaped hole; 14-a third slit-shaped aperture; 2-prism, 3-LED board.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like are used in the orientation or positional relationship indicated in the drawings or the assembly, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

Referring to fig. 1, a display device generally includes a backlight module and a display panel 05, and the backlight module can be divided into a direct type backlight module and a side type backlight module according to the light incident mode of the backlight module. The direct type backlight module does not need to be provided with a light guide plate, and is very popular with consumers due to the advantages of high quality and low price.

As shown in fig. 1, the direct-type backlight module mainly includes a reflector plate 01, a back plate 06 matched with the reflector plate 01, a light source 03, and an optical module 07, wherein the back plate 06 is disposed at one side of the reflector plate 01 and fixed to the reflector plate 01, and the optical module 07 is disposed at the other side of the reflector plate 01 and configured to emit light reflected by the reflector plate 01 to the display panel 05 uniformly. Referring to fig. 2 and 3, a plurality of through holes 011 are arranged in an array on a reflector sheet 01, prisms 04 are arranged in the through holes 011, referring to fig. 1, a light source 03 is arranged below each prism 04, and the prisms 04 are fixed on an LED board 02 through pins; a plurality of triangular-prism-shaped microstructures 012 are disposed at intervals outside each light source 03 of the reflective sheet 01, and each microstructure 012 has a reflective surface facing the light source 03 and is configured to receive and reflect light from the prism 04.

However, the gap between the through hole 011 and the light source 03 of the reflective sheet 01 is large, and the light between the through hole 011 and the light source 03 cannot be reflected and utilized again from the bottom of the prism 04, so that the light utilization rate is low, and the lamp shadow phenomenon is generated.

To the above problem, the embodiment of the utility model provides a display device, under the prerequisite that prevents the prism and drop, reduce the space between through-hole edge and the LED board to improve light utilization ratio, avoided the production of lamp shadow phenomenon.

An embodiment of the utility model provides a pair of display device, refer to fig. 4 and fig. 5, including straight following formula backlight unit, straight following formula backlight unit includes reflector plate 1, is equipped with through-hole 11 on the reflector plate 1, be equipped with in the through-hole 11 the light source and with light source fixed connection's prism 2, the position that reflector plate 1 is close to through-hole 11 is equipped with the buffer hole, the buffer hole is used for making 11 edges of through-hole produce bending deformation from the department of punching a hole when receiving the extrusion.

As can be seen from the above direct type backlight module, referring to fig. 4 and 5, when the reflector sheet 1 expands in a high temperature environment or contracts in a low temperature environment to press the prism 2, the edge of the through hole 11 is bent and deformed from the punched hole by the buffer hole near the through hole 11, so that the pressing force of the reflector sheet 1 on the prism 2 is reduced, and the prism 2 is prevented from falling off; simultaneously, compare with prior art, the utility model discloses direct type backlight unit of embodiment has reduced the space between 11 edges of through-hole and the LED board 3 to improve light utilization ratio, avoided the production of lamp shadow phenomenon.

The position and shape of the buffer hole are various, as shown in fig. 4 and 5, for example: the buffer hole includes a first slit hole 12 formed to extend from inside the through hole 11 in a direction away from the through hole 11. It should be understood that the buffer holes are slit-shaped, and compared with other shapes, the slit-shaped holes have better splitting effect under the condition of the same light transmission amount, so that the edges of the through holes 11 are more prone to bending deformation, and the extrusion acting force of the reflector 1 on the prism 2 is smaller; meanwhile, the through hole 11 is communicated with the first slit-shaped hole 12, so that the edge of the through hole 11 is not a stressed whole any more, the edge of the through hole 11 is easier to bend and deform, and the extrusion acting force of the reflector plate 1 on the prism 2 is further reduced.

It should be noted that the first slit hole may be arc-shaped or straight. For example: when the first slit-shaped hole 12 is arc-shaped, referring to fig. 6, when the prism 2 is pressed by the reflector sheet 1 expanding in a high temperature environment or contracting in a low temperature environment, the edge of the pressed through-hole 11 is bent from the end of the first slit-shaped hole 12 far from the through-hole 11, thereby reducing the pressing force of the reflector sheet 1 to the prism 2. Another example is: when the first slit-shaped hole 12 is linear, referring to fig. 5, the beneficial effect of the linear first slit-shaped hole 12 is the same as that of the arc-shaped first slit-shaped hole 12, which is not described herein again.

It can be understood that the edge of the through hole 11 closer to the first slit hole 12 is more easily bent and deformed, and the pressing force of the reflecting sheet 1 to the prism 2 is smaller when the edge of the through hole 11 closer to the first slit hole 12 is pressed. Since any one of the edges of the through hole 11 may be pressed due to uncertainty in the direction in which the reflective sheet 1 expands or contracts, in order to cause any one of the edges of the through hole 11 to be pressed against the prism 2, the prism 2 is pressed with a small pressing force, as shown in fig. 4 and 5, the number of the first slit holes 12 is plural, and the plural first slit holes 12 are uniformly distributed along the edge of the through hole 11. At this moment, because a plurality of first slot holes 12 are evenly distributed along the edge of the through hole 11, when the reflector plate 1 expands or contracts in any direction to enable the edge of the through hole 11 to be extruded with the prism, the first slot holes 12 are arranged near the extruded edge of the through hole 11, the extruded edge of the through hole 11 preferentially bends and deforms from the nearest first slot hole 12, so that the extrusion acting force applied to the prism 3 is small, and therefore the reflector plate 1 can ensure that the extrusion acting force applied to the prism 2 is small no matter expands or contracts in any direction.

In some embodiments, referring to fig. 5, the through hole 11 is a polygon, and when the reflector 1 expands in a high temperature environment or contracts in a low temperature environment to press the prism 2, one side of the polygon is pressed against the prism 2, and the first slit hole 12 extends along the corner of the through hole 11 in a direction away from the through hole 11 in order to generate a relatively uniform bending deformation of the pressed side as a whole. In this way, when the edge of the through hole 11 is extruded with the prism 2, the whole edge of the extruded through hole 11 is bent and deformed along the first slit-shaped hole 12 at the corner of the through hole 11, compared with the case that the first slit-shaped hole 12 is arranged on the edge of the through hole 11, the whole edge of the through hole contacted with the prism 2 is more easily bent and deformed, the extrusion acting force applied to the prism 2 is reduced, and the extrusion acting force applied to the contact part of the prism 2 and the edge of the through hole 11 is more uniform; meanwhile, the first slit-shaped hole 12 extends along the corner of the through hole 11 to the direction far away from the through hole 11, so that the reflector plate 1 is easy to position and open, and the realization cost is low.

It should be noted that, because there is uncertainty about the direction of expansion or contraction of the reflective sheet 1, any position of the edge of the through hole 11 may be pressed, and when the through hole 11 is circular, referring to fig. 7, when the edge of the through hole 11 is pressed against the prism 2, the pressing force applied to the edge of the through hole 11 is perpendicular to the tangent line of the edge of the through hole 11, and in order to reduce the magnitude of the pressing force, the extending direction of the first slit holes 12 is perpendicular to the tangent line of the edge of the through hole 11. In this case, when the edge of the through hole 11 is pressed against the prism 2, the edge of the pressed through hole 11 is bent along the first slit-shaped hole 12 perpendicular to the edge tangent line, so that the pressing force applied to the prism 2 is small. When the through hole 11 is polygonal, referring to fig. 5, when the edge of the through hole 11 is pressed against the lens 2, the pressing force applied to the edge of the through hole 11 is mainly a force perpendicular to the side of the through hole 11, and in order to reduce the magnitude of the pressing force, the plurality of first slit holes 12 extend in a direction perpendicular to the side of the through hole 11. In this way, when the edge of the through hole 11 is extruded with the lens 2, the edge of the extruded through hole 11 is bent and deformed along the first slit-shaped hole 12 perpendicular to the edge, so that the extrusion acting force on the lens 2 is small; meanwhile, the first slit-shaped hole 12 is perpendicular to the edge of the through hole 11, so that the reflector plate 1 is easy to open, and the realization cost is low.

It should be understood that, referring to fig. 5, when the distance between the end of the first slit-shaped hole 12 far from the through hole 11 and the edge of the prism 2 is less than the expansion length of the reflector 1, when the edge of the through hole 11 presses the prism, the prism 2 is stressed too much, there is a risk of falling off, and in order to avoid the prism 2 falling off, therefore, the distance between the end of the first slit-shaped hole 12 far from the through hole 11 and the edge of the prism 2 is greater than or equal to the expansion length of the reflector 1. When the distance between one end of the first slit-shaped hole 12 far away from the through hole 11 and the edge of the prism 2 is more than the expansion length of the reflector plate 1, the prism 2 can be prevented from being extruded and falling off; however, the opening length is long, the bending deformation length is long, and other problems such as uneven light mixing and the like are caused after bending deformation is easily generated; therefore, preferably, the distance between one end of the first slit-shaped hole 12 far away from the through hole 11 and the edge of the prism 2 is equal to the expansion length of the reflector 1, so that the cost is low, and the problems of uneven light mixing and the like caused by too long bending deformation of the first slit-shaped hole 12 are avoided.

Wherein, because 70 ℃ is the highest temperature that may appear in the reflector plate 1 when the display device works, when the distance between one end of the first slit-shaped hole 12 far away from the through hole 11 and the edge of the prism 2 is equal to the expansion length of the reflector plate 1 at 70 ℃, the expansion length of the reflector plate 1 can be ensured to be less than or equal to the distance between one end of the first slit-shaped hole 12 far away from the through hole 11 and the edge of the prism 2 when the display device works, thereby preventing the prism 2 from falling off due to overlarge stress. The reflector plate 1 with different sizes is tested for multiple times, the expansion length of the reflector plate 1 with different sizes is 1-3 mm at 70 ℃, and therefore the distance between one end of the first slit-shaped hole 12 far away from the through hole 11 and the edge of the prism 2 is 1-3 mm, and the reflector plate 1 cannot extrude and fall off the prism 2 due to expansion or contraction in the actual use process of a user.

The position and shape of the opening of the buffer hole are various, as shown in fig. 8 and 9, for example: the buffer hole includes the second slot hole 13 that sets up around through-hole 11, and second slot hole 13 is relatively independent with through-hole 11, and second slot hole 13 avoids the setting with through-hole 11 promptly, and does not communicate with through-hole 11. It should be understood that, since the second slit-shaped holes 13 are provided on both sides of the through-hole 11, the stiffness of the portion of the reflective sheet 1 provided with the second slit-shaped holes 13 is reduced, so that the edge of the through-hole 11 is easily bent and deformed to reduce the pressing force of the reflective sheet 1 on the prism 2.

When the second slit-shaped hole is only arranged corresponding to one side of the through hole, the stiffness of the side is reduced by the through hole and the other side opposite to the side provided with the second slit-shaped hole due to the fact that the second slit-shaped hole is not arranged, when the side provided with the second slit-shaped hole extrudes the prism, the prism is stressed too much, the risk of falling is existed, and in order to avoid the prism falling, therefore, as shown in fig. 8 and 9, the second slit-shaped hole 13 comprises an upper second slit-shaped hole 131 and a lower second slit-shaped hole 132, the upper second slit-shaped hole 131 and the lower second slit-shaped hole 132 are arranged on the two opposite sides of the through hole 11, and the stiffness of the two opposite sides of the through hole 11 is reduced. Under this condition, when the side extrusion prism of through-hole 11, because the relative both sides of through-hole 11 all are equipped with second slot hole 12 for the stiffness on the relative both sides limit of through-hole 11 descends, so arbitrary limit extrusion prism in the relative both sides of through-hole 11, the extruded side of through-hole 11 all can take place bending deformation, makes the extrusion effort that the prism received reduce, thereby prevents that the prism from droing.

It is understood that, as shown in fig. 8 and 9, when the distance between the second slit hole 13 and the edge corresponding to the prism is less than the expansion length of the reflection sheet 1, when the edge of the through hole 11 presses the prism, the prism is stressed excessively, there is a risk of falling off, and in order to avoid the prism 2 from falling off, therefore, the distance between the second slit hole 13 and the edge corresponding to the prism is greater than or equal to the expansion length of the reflection sheet 1. When the distance between the second slit-shaped hole 13 and the edge of the corresponding prism is larger than the expansion length of the reflector plate 1, the prism 2 can be prevented from being extruded and falling off; however, the longer the distance, the more difficult it is to bend and deform the side line of the second slit hole 13 corresponding to the through hole 11. Therefore, it is preferable that the distance between the second slit-shaped hole 13 and the edge corresponding to the prism is equal to the expansion length of the reflection sheet 1, which not only is low in cost, but also is easy for the side line of the second slit-shaped hole 13 corresponding to the through hole 11 to bend and deform.

Because 70 ℃ is the highest temperature which may occur to the reflecting sheet 1 when the display device works, when the distance between the second slit-shaped hole 13 and the corresponding edge of the prism is equal to the expansion length of the reflecting sheet 1 at 70 ℃, the expansion length of the reflecting sheet 1 when the display device works can be ensured to be smaller than or equal to the distance between the second slit-shaped hole 13 and the corresponding edge of the prism, so that the prism 2 is prevented from falling off due to overlarge stress. The reflector plate 1 with different sizes is tested for multiple times, the expansion length of the reflector plate 1 with different sizes is 1-3 mm at 70 ℃, and therefore the distance between one end of the first slit-shaped hole 12 far away from the through hole 11 and the edge of the prism 2 is 1-3 mm, and the reflector plate 1 cannot extrude and fall off the prism 2 due to expansion or contraction in the actual use process of a user. In addition, since the material of the reflection sheet 1 is soft, the size of the through hole 11 may be slightly smaller than that of the prism when the reflection sheet 1 is fitted around the prism. Specifically, the distance from the edge of the prism to the edge of the through hole 11 is less than or equal to 1mm, so the distance between the upper second slit-shaped hole 131 and the lower second slit-shaped hole 131 and the corresponding edge of the through hole 11 is 1mm to 4 mm; since the edge line of the through hole 11 may be located below the prism, and the horizontal cross section of the prism is generally circular, the second slit hole 13 is formed by controlling the distance between the second slit hole 13 and the edge of the prism or controlling the distance between the second slit hole 13 and the corresponding edge line of the through hole 11, which is difficult, so as to facilitate forming the second slit hole 13 meeting the specification, generally, the specification requirement is designed by the distance between the upper second slit hole 131 and the lower second slit hole 132, that is, the expansion length of the reflective sheet 1 at 70 ℃ and the size of the prism are considered by the distance between the upper second slit hole 131 and the lower second slit hole 132, in the embodiment of the present invention, since the diameter of the prism is 16mm, the distance between the upper second slit hole 131 and the lower second slit hole 132 is 18mm to 22 mm.

It can be understood that the second slit-shaped hole may be an arc slit-shaped hole or a linear slit-shaped hole, and the linear slit-shaped hole is difficult to open, so referring to fig. 8 and 9, the second slit-shaped hole 13 is a linear slit-shaped hole. At this time, if the length of the formed linear slit hole is greater than the maximum diameter of the through hole 11, when the through hole 11 is pressed against the prism, the pressed edge of the through hole 11 is bent from the farthest end of the linear slit hole, because the length of the linear slit hole is greater than the maximum diameter of the through hole 11, the bending deformation of the farthest end of the linear slit hole is more difficult, and the forming difficulty of the portion of the linear slit hole exceeding the maximum diameter of the through hole 11 is very large, therefore, fig. 8 and 9 show that the second slit hole 13 is a linear slit hole, the length of the linear slit hole is less than or equal to the maximum diameter of the through hole 11, when the edge of the through hole 11 is pressed, the edge of the through hole 11 is bent from both ends of the second slit hole 13, because the length of the second slit hole 13 is less than or equal to the maximum diameter of the through hole 11, the projection is toward the through hole 11 along the direction perpendicular to the second slit hole, the second slit-shaped holes 13 are all located in the through hole 11, so that the edge of the through hole 11 is less difficult to bend and deform, the extrusion acting force of the through hole 11 on the prism is less, and meanwhile, the second slit-shaped holes 13 smaller than or equal to the maximum diameter of the through hole 11 are easier to open.

As shown in fig. 8 and 9, the through-hole 11 includes opposite lateral edge sides and opposite longitudinal edge sides, a certain distance is left between an edge line of the lateral edge side of the through-hole 11 and a corresponding prism, the certain distance is a safety avoidance distance, that is, a space is left between the edge line of the lateral edge of the through-hole 11 and the edge of the prism, the space exposes the LED board, there is no safety avoidance distance between the vertical edge of the through-hole 11 and the prism, that is, the edge line of the longitudinal edge side is located below the prism, and the upper second slit-shaped hole 131 and the lower second slit-shaped hole 132 are respectively disposed on both sides of the opposite longitudinal edge sides, so that the stiffness of the upper edge and the lower edge of the through-hole 11 is reduced. At this time, when the reflection sheet 1 expands or contracts in the longitudinal direction, since the stiffness of the upper edge and the lower edge of the through hole 11 is lowered, when the vertical edge of the through hole 11 is pressed against the prism, the upper edge or the lower edge of the through hole 11 is bent and deformed, so that the pressing force of the upper edge or the lower edge of the through hole 11 against the prism is reduced, thereby preventing the prism from falling off. When the reflector plate 1 expands or contracts along the transverse direction, the transverse edge of the through hole 11 cannot extrude the prism due to the safety avoidance distance between the transverse edge of the through hole 11 and the prism, so that the prism is prevented from falling off. Meanwhile, an LED board is correspondingly arranged right below each transverse row of through holes 11, the LED board is usually coated with a coating with a reflection function, and because the vertical edges of the through holes 11 and the prism have no safe avoidance distance, the distance between the vertical edges of the through holes 11 is smaller than or equal to the board width of the LED board, and light rays between the transverse edges of the through holes 11 and the prism can be reflected and utilized by the reflective coating on the LED board. On the basis, on the premise of preventing the prism from falling off, the light between the through hole 11 and the prism 2 is completely reflected and utilized, the light utilization rate is improved, and the generation of a lamp shadow phenomenon is avoided.

In some embodiments, as shown in fig. 10 and 11, the buffer hole includes a first slit hole 11 and a third slit hole 14, and the third slit hole 14 is relatively independent from the through hole 11, i.e., the third slit hole 14 is disposed avoiding the first slit hole 12 and does not communicate with the through hole 11. At this time, when the reflecting sheet 1 expands in a high temperature environment or contracts in a low temperature environment to press the prism 2, the edge of the pressed through hole 11 is bent from one end of the first slit-shaped hole 12 far away from the through hole 11, so that the pressing force of the reflecting sheet 1 on the prism 2 is reduced; meanwhile, as the third slit-shaped hole 14 is further formed in the reflector plate 1, the stiffness of the portion of the reflector plate 1 provided with the third slit-shaped hole 14 is reduced, so that the portion of the reflector plate 1 provided with the third slit-shaped hole 14 is more easily bent and deformed, and the extrusion acting force on the prism 2 when the reflector plate 1 expands or contracts is further reduced.

It should be noted that, for more clearly describing various aspects of the embodiments of the present invention, when the reflector plate of the embodiments of the present invention includes the first slit-shaped hole and the second slit-shaped hole, the second slit-shaped hole is described by the third slit-shaped hole, and the third slit-shaped hole and the second slit-shaped hole have no other difference except for the description.

It can be understood that, because there is uncertainty about the direction of expansion or contraction of the reflector 1, any one of the edges of the through hole 11 may be pressed, and therefore, in order to ensure that the pressing force applied to the prism 2 when any one of the edges of the through hole 11 is pressed against the prism 2 is small, referring to fig. 12 and 14, a plurality of third slit holes 14 are provided, and the plurality of third slit holes 14 are uniformly distributed around the through hole 11. At this moment, because a plurality of third slot holes 14 evenly distributed are around through-hole 11, reflector plate 1 is to arbitrary orientation inflation or shrink extrusion through-hole 11's edge, and through-hole 11 receives the extruded edge and all has third slot holes 14, and through-hole 11 receives the rigidity on extruded edge lower for the extrusion effort that prism 2 received is all less, thereby realizes that reflector plate 1 no matter can guarantee that prism 2 receives extrusion effort less to arbitrary orientation inflation or shrink.

The extending direction of the third slit hole 14 is various, for example: referring to fig. 12, the third slit hole 14 extends in a direction perpendicular to the side of the through hole 11. Another example is: referring to fig. 14, the extension direction of the third slit hole 14 is parallel to the side of the through hole 11.

In some embodiments, as shown in fig. 13 and 14, the through hole 11 has a polygonal shape, and when the edge of the through hole 11 is pressed against the prism 2, the pressing force applied to the edge of the through hole 11 is mainly a force perpendicular to the side of the through hole 11, and in order to reduce the magnitude of such pressing force as much as possible, the plurality of third slit holes 14 extend in a direction parallel to the side of the through hole 11. In this way, when the edge of the through hole 11 is pressed against the prism 2, the reflection sheet 1 is bent and deformed from the portion between the straight lines where the plurality of third slit holes 14 are located and the portion between the straight lines and the edge of the through hole 11, so that the pressing force applied to the prism 2 is small.

Further, referring to fig. 13, when the plurality of third slit holes 14 parallel to the sides of the through hole 11 are randomly arranged, when the edge of the through hole 11 is pressed against the prism 2, the edge of the through hole 11 having the plurality of third slit holes 14 is bent and deformed to a different extent due to the uneven intervals between the plurality of third slit holes 14, and particularly, when the deformation of the region between the third slit holes 14 is severe, the problem of breakage or permanent deformation is likely to occur, and in order to avoid the above-mentioned problem, as shown in fig. 14, the third slit holes 14 are arranged in an array around the through hole 11. In this case, when the edge of the through hole 11 is pressed against the prism 2, the reflective sheet 1 is bent and deformed from the straight line between the straight lines where the plurality of third slit holes 14 are located and the part between the straight line and the edge of the through hole 11, and the interval between every two adjacent third slit holes 14 is uniform, so that the problem that the areas between the part of the third slit holes 14 are subjected to large torsion due to the uneven interval of the plurality of third slit holes 14, and the breakage, permanent deformation and the like are caused is avoided.

It should be noted that the distance between every two adjacent third slit-shaped holes along the direction perpendicular to the third slit-shaped holes is preferably 0.15mm to 0.25mm, and the distance between every two adjacent third slit-shaped holes may be set according to actual conditions.

Considering the expansion or contraction consistency of the reflector plate, the buffer seams arranged around all the through holes on the reflector plate are the same.

The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides a display device, includes straight following formula backlight unit, straight following formula backlight unit includes the reflector plate, be equipped with the through-hole on the reflector plate, be equipped with the light source in the through-hole and with light source fixed connection's prism, its characterized in that, the reflector plate is close to the position of through-hole is equipped with the buffer hole, the buffer hole is used for making follow when the through-hole edge receives the extrusion buffer hole department produces bending deformation.

2. The display device according to claim 1, wherein the buffer hole includes a first slit hole formed to extend from inside the through hole in a direction away from the through hole.

3. The display device according to claim 2, wherein the through hole has a polygonal shape, and the first slit hole extends along a corner of the through hole in a direction away from the through hole.

4. The display device according to claim 2, wherein a distance between one end of the first slit-shaped hole away from the through hole and the edge of the prism is in a range of 1mm to 3 mm.

5. The display device according to claim 1, wherein the buffer hole includes a second slit-shaped hole provided around the through-hole, the second slit-shaped hole being relatively independent from the through-hole.

6. The display device according to claim 5, wherein the second slit-shaped hole comprises an upper second slit-shaped hole and a lower second slit-shaped hole, and the upper second slit-shaped hole and the lower second slit-shaped hole are provided on opposite sides of the through hole.

7. The display device according to claim 5, wherein the second slit-shaped hole is a linear slit-shaped hole having a length less than or equal to a maximum diameter of the through-hole.

8. The display device according to claim 6, wherein a distance between the upper second slit-shaped hole and the lower second slit-shaped hole ranges from 18mm to 22mm, and a distance between each of the upper second slit-shaped hole and the lower second slit-shaped hole and a corresponding side through-hole borderline ranges from 1mm to 4 mm.

9. The display device according to claim 6, wherein the through hole includes a transverse edge side and an opposite longitudinal edge side, the transverse edge side has an edge line spaced from the edge of the prism, the longitudinal edge side has an edge line under the prism, and the upper and lower second slit holes are respectively disposed at two sides of the opposite longitudinal edge side.

10. The display device according to claim 2, wherein the buffer hole further comprises a third slit-shaped hole disposed around the through hole, the third slit-shaped hole is independent from the through hole, the third slit-shaped hole is disposed in plurality, and an extending direction of the plurality of slit-shaped holes is parallel and/or perpendicular to an extending direction of the first slit-shaped hole.

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