CN213399142U - Display device - Google Patents
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- CN213399142U CN213399142U CN202022825588.8U CN202022825588U CN213399142U CN 213399142 U CN213399142 U CN 213399142U CN 202022825588 U CN202022825588 U CN 202022825588U CN 213399142 U CN213399142 U CN 213399142U
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Abstract
The utility model discloses a display device, including display panel and backlight unit, backlight unit includes: the backplate, a plurality of miniature emitting diode lamp plate and a plurality of reflector plate, first concatenation seam between two adjacent miniature emitting diode lamp plates and the second concatenation seam between two adjacent reflector plates are each other not overlapped, the second concatenation seam of reflector plate falls on the reflector layer of miniature emitting diode lamp plate upper surface, stagger with the first concatenation seam between miniature emitting diode lamp plate, the reflector layer has the nature that carries out the reflection to the light, therefore when the light that miniature emitting diode sent out passes through the second concatenation seam of reflector plate, light is through the reflector layer reflection reuse, avoid producing the shadow, improve the luminous efficiency who is shaded, improve display device's display effect.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a display device.
Background
The micro Light Emitting Diode (Mini LED) has become a current hot spot in the Light Emitting Diode (LED) display as the backlight, and a huge amount of Mini LED crystal grains are applied to the backlight field of the module as the backlight source, so that not only can the thinning of the backlight be realized, but also the more refined dynamic control can be realized, and the dynamic contrast of the liquid crystal display can be improved.
The maximum range of a die bonder used for manufacturing the mini LED lamp panel is 500mm, and the printed circuit board of the mini LED lamp panel is too large in size, so that the problems of serious expansion and shrinkage of the board, low precision of a bonding pad and the like can occur, and therefore, a lamp panel splicing mode is mostly adopted for large-size display devices; when the backlight reflector is manufactured, the number of punched holes on the reflector is huge, and the process is more complicated than that of a common LED backlight reflector, so that the large-size mini LED backlight lamp panel cannot be attached to the reflector in a whole mode, and the reflector can be processed according to the size of a single lamp panel. However, due to the design mode, the splicing position of the reflector plate in the Mini LED backlight can be caused, and light at the splicing position of the Mini LED lamp panel can not be reflected again and reused to cause dark lines, so that the brightness of the display area of the backlight module is uneven, and the display effect of the display device is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model discloses in some embodiments, display device includes display panel and backlight unit, and backlight unit includes: the backplate, a plurality of miniature emitting diode lamp plate and a plurality of reflector plate, first concatenation seam between two adjacent miniature emitting diode lamp plates and the second concatenation seam between two adjacent reflector plates are each other not overlapped, the second concatenation seam of reflector plate falls on the reflector layer of miniature emitting diode lamp plate upper surface, stagger with the first concatenation seam between miniature emitting diode lamp plate, the reflector layer has the nature that carries out the reflection to the light, therefore when the light that miniature emitting diode sent out passes through the second concatenation seam of reflector plate, light is through the reflector layer reflection reuse, avoid producing the shadow, improve the luminous efficiency who is shaded, improve display device's display effect.
The utility model discloses in some embodiments, miniature emitting diode lamp plate includes: the LED comprises a circuit board, a micro LED, a reflecting layer and a packaging layer; the surface of the circuit board is coated with a reflective layer with reflective property, and the reflective layer is an insulating protective layer and has the function of protecting the circuit board. The position of the bonding pad for welding the micro light-emitting diode is exposed by the reflecting layer through the processes of etching and the like, and an opening for exposing the micro light-emitting diode is formed.
In some embodiments of the present invention, the reflective layer is made of white ink, and the reflectivity of the white ink is greater than or equal to 85%.
The utility model discloses in some embodiments, the reflectivity of reflector plate is greater than or equal to 94%, and miniature emitting diode is to the light of backplate one side outgoing, perhaps reflects the light of backplate one side by the component among the backlight unit, can be reflected to light-emitting one side again by the reflector plate of high reflectivity, improves the utilization efficiency of light source from this.
The utility model discloses in some embodiments, the reflector plate is greater than the width of miniature emitting diode lamp plate at least in the ascending width of one side in first direction and second direction, can guarantee first concatenation seam and second concatenation seam mutually not overlap to reduce the quantity of second concatenation seam as far as possible, set up the reflector plate of still less quantity.
The utility model discloses in some embodiments, the width of reflector plate on the first direction is greater than the width of miniature emitting diode lamp plate on the first direction, the width of reflector plate on the second direction equals the width of miniature emitting diode lamp plate on the second direction, can guarantee like this that the second concatenation seam that the reflector plate was arranged at the first direction staggers with the first concatenation seam that miniature emitting diode lamp plate was arranged at the first direction, the light that miniature emitting diode sent out this moment is when the second concatenation seam of reflector plate, light is utilized once more through the reflector layer reflection, avoid producing the shadow, improve the luminous efficiency who is shaded, improve display device's display effect.
The utility model discloses in some embodiments, when being applied to small-size display device, backlight unit includes three miniature emitting diode lamp plate, and three miniature emitting diode lamp plate is arranged along the first direction, so, can set up two reflectors, and the width of reflector on the first direction is 1.5 times of miniature emitting diode lamp plate width on the first direction to make the size of two reflectors and three miniature emitting diode lamp plate sizes the same.
The utility model discloses in some embodiments, the width of reflector plate on the first direction is greater than the width of miniature emitting diode lamp plate on the first direction, and the width of reflector plate on the second direction is different with the width of miniature emitting diode lamp plate on the second direction. Therefore, the first splicing seams in the first direction and the second direction can be guaranteed to be completely shielded by the reflector plate to the maximum extent, the second splicing seams arranged in the first direction of the reflector plate are staggered with the first splicing seams arranged in the first direction of the micro light-emitting diode lamp plate, the second splicing seams arranged in the second direction of the reflector plate are staggered with the first splicing seams arranged in the second direction of the micro light-emitting diode lamp plate, light emitted by the micro light-emitting diode passes through the second splicing seams of the reflector plate at the moment, the light is reflected by the reflecting layer to be reused, the generation of a shadow is avoided, the backlight light-emitting efficiency is improved to the maximum extent, and the display effect of the display device is improved.
The utility model discloses in some embodiments, the quantity of reflector plate is less than miniature emitting diode lamp plate quantity, sets up the quantity that can reduce second concatenation seam like this, makes more light reflected by the reflector plate of high reflectivity, improves the luminous efficiency that is shaded to improve display device's display effect.
The utility model discloses in some embodiments, miniature emitting diode's size is below 500 mu m, is favorable to sending out light control to littleer subregion with backlight unit's developments, can realize the dynamic control more that becomes more meticulous, promotes display device's dynamic contrast.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below 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 cross-sectional structure diagram of a display device according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a backlight module according to an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of a backlight module in the prior art;
FIG. 4 is a partial top view of a backlight module in the prior art;
fig. 5 is a partial top view of a backlight module according to an embodiment of the present invention;
fig. 6 is a second partial top view of the backlight module according to the embodiment of the present invention.
The LED backlight module comprises a backlight module 100, a display panel 200, a back panel 11, a miniature LED lamp panel 12, a reflector 13, a diffuser 14, an optical diaphragm 15, a diffuser bracket 16, a circuit board 121, a miniature LED 122, a light reflecting layer 123, a packaging layer 124, a first splicing seam S1 and a second splicing seam S2.
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words for expressing the position and direction described in the present invention are all the explanations given by taking the drawings as examples, but can be changed according to the needs, and the changes are all included in the protection scope of the present invention. The drawings of the present invention are only for illustrating the relative positional relationship and do not represent true proportions.
The liquid crystal display mainly comprises a backlight module and a liquid crystal display panel. The liquid crystal display panel does not emit light, and brightness display needs to be realized by a light source provided by the backlight module.
The display principle of the liquid crystal display is that liquid crystal is placed between two pieces of conductive glass, and the electric field effect of liquid crystal molecule distortion is caused by the driving of an electric field between two electrodes so as to control the transmission or shielding function of a backlight source, thereby displaying an image. If a color filter is added, a color image can be displayed.
Fig. 1 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present invention.
Referring to fig. 1, the display device includes: a backlight module 100 and a display panel 200.
The display panel 200 is located at the light emitting side of the backlight module 100, the shape and size of the display panel are generally matched with those of the backlight module, and the display panel 200 may be configured as a rectangle in general, including a top side, a bottom side, a left side and a right side, where the top side is opposite to the bottom side, the left side is opposite to the right side, the top side is connected to one end of the left side and one side of the right side, and the bottom side is connected to the other end of the left side and the other end of the right side.
The display panel 200 is a transmissive display panel, which can modulate the transmittance of light, but does not emit light by itself. The display panel 200 has a plurality of pixel units arranged in an array, and each pixel unit can independently control the transmittance and color of light incident to the pixel unit from the backlight module 100, so that the light transmitted by all the pixel units forms a displayed image.
The backlight module 100 is generally disposed at the bottom of the display device, and has a shape and size corresponding to those of the display device. When applied to the field of televisions or mobile terminals, the backlight module generally takes a rectangular shape.
The embodiment of the utility model provides an in backlight unit adopt straight following formula backlight unit for even light that sends in whole light-emitting surface provides sufficient and the even light that distributes of luminance for display panel, so that display panel can normally show the image.
Fig. 2 is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention.
Referring to fig. 2, the backlight assembly includes: the backlight module comprises a back plate 11, a micro light emitting diode lamp panel 12, a reflector plate 13, a diffusion plate 14, an optical film 15 and a diffusion plate support 16.
The back plate 11 is located at the bottom of the backlight module and has supporting and bearing functions. The back plate 11 is typically a rectangular structure, the shape of which is adapted to the shape of the display device when applied to a contoured display device. The back panel 11 includes a top side, a bottom side, a left side, and a right side. Wherein the antenna side is opposite to the ground side, the left side is opposite to the right side, the antenna side is connected with one end of the left side and one side of the right side respectively, and the ground side is connected with the other end of the left side and the other end of the right side respectively.
The material of the back plate 11 is aluminum, iron, aluminum alloy or iron alloy. The back plate 11 is used for fixing the edge positions of the miniature led lamp panel 12 and supporting and fixing the components such as the reflector 13, the diffuser plate 14 and the optical diaphragm 15, and the back plate 11 also plays a role in heat dissipation of the miniature led lamp panel 12.
In the embodiment of the present invention, the backlight module is a direct type backlight module, and the micro led lamp panel 12 is used as the backlight source. The micro led lamp panel 12 is located on the back panel 11.
In general, the entirety of the micro led lamp panel 12 may be square or rectangular. The micro light-emitting diode lamp panel 12 comprises a plurality of micro light-emitting diode light sources, due to the limitation of the range of the die bonder, the problems of serious expansion and contraction of the board, low precision of the bonding pad and the like can also occur when the circuit board is too large in size, and the size of the micro light-emitting diode lamp panel 12 is not suitable to be too large. When applied to a large-sized display device, a plurality of micro led lamp panels 12 are usually spliced to provide backlight.
According to the size of display device can set up a plurality of miniature emitting diode lamp plates 12, for example, 75 inches' S TV can adopt and provide backlight jointly through the concatenation mode between 2 x 8 miniature emitting diode lamp plates 12, and at this moment, the concatenation seam between two adjacent miniature emitting diode lamp plates 12 is first concatenation seam S1.
Specifically, referring to fig. 2, the micro led lamp panel 12 specifically includes: a circuit board 121, micro light emitting diodes 122, a light reflecting layer 123 and an encapsulation layer 124.
The circuit board 121 is located on the back plate 11, and the shape of the circuit board 121 is the same as the overall shape of the micro led lamp panel 12. In general, the circuit board 121 has a plate shape, and has a rectangular or square shape as a whole.
The circuit board 121 is used for providing a driving electrical signal for the micro light emitting diode 122. The micro light emitting diode 122 and the circuit board 121 are separately manufactured, the surface of the circuit board 121 includes a plurality of bonding pads for soldering the micro light emitting diode 122, the micro light emitting diode 122 is transferred to the bonding pads after the manufacturing, and the micro light emitting diode 122 is soldered on the circuit board 121 through processes such as reflow soldering, so that the micro light emitting diode 122 can be driven to emit light by controlling an input signal of the circuit board 121.
In the embodiment of the present invention, the Circuit Board 121 may be a Printed Circuit Board (Printed Circuit Board, PCB for short), the PCB includes a substrate and a conductive layer, the conductive layer is plated and deposited on the substrate through a conductive material, and then a Circuit is formed by etching the Circuit as required, and the material of the conductive layer may be copper.
The substrate of the circuit board 121 may be made of FR4, aluminum base, or glass. Alternatively, the substrate or the substrate base plate of the circuit board 121 may be made of a flexible material to form a flexible display device.
The micro light emitting diodes 122 are located on the circuit board. The electrodes of the micro leds 122 are soldered to the exposed pads of the circuit board 121, so as to electrically connect the two.
The micro light emitting diode 122 is different from a general light emitting diode, and is specifically referred to as a micro light emitting diode chip. Because the size of the micro light emitting diode 122 is very small, the dynamic light emitting of the backlight module is controlled to be in a smaller partition, more refined dynamic control can be realized, and the dynamic contrast of the display device is improved. In the embodiment of the present invention, the size of the micro light emitting diode 122 is below 500 μm.
The micro led lamp panel 12 may include only one color of micro leds 122, and may also include multiple colors of micro leds 122, which is not limited herein.
The reflective layer 123 is located on the surface of the circuit board 121 near the micro led 122, and is an insulating protective layer, which has a function of protecting the circuit board. In the embodiment of the present invention, the reflective layer 123 is coated on the surface of the circuit board 121 by a material having reflective property, and the position of the pad for welding the micro light emitting diode 122 is exposed by etching or the like, so as to form the opening for exposing the micro light emitting diode 122.
In the embodiment of the present invention, the material used for the reflective layer 123 is white ink with a property of reflecting light, and the reflectivity of the white ink is greater than or equal to 85%, which is not limited herein.
The encapsulation layer 124 is a protective adhesive covering the surface of the micro light emitting diode 122 facing away from the circuit board 121. The encapsulation layer 124 is used for encapsulating and protecting the micro light emitting diode 122 and blocking foreign matters from entering the interior of the micro light emitting diode 122. In the embodiment of the present invention, the encapsulation layer 124 can be made of transparent colloid material, such as silica gel, modified silica gel or epoxy resin with better permeability.
The embodiment of the utility model provides an in, the encapsulated layer 124 can adopt the mode preparation of whole layer coating, bar coating and point coating, and wherein the encapsulated layer 124 adopts whole layer coating mode preparation simple process, because the encapsulated layer 124 is glued for transparent protection, light still can see through encapsulated layer 124 and reachs reflector layer 123 during whole layer coating, and reflector layer 123 is to the light reflection. The encapsulation layer 124 can also be formed by bar coating and spot coating, wherein the spot coating can save the encapsulation material and reduce the cost.
The reflector 13 is located above the micro led lamp panel 12, and is usually configured to be rectangular or square. The embodiment of the utility model provides a reflector plate 13's reflectivity is more than or equal to 94%, because the metal has higher reflectivity, consequently can adopt metal material to make reflector plate 13. For example, the alloy is made of one or more of silver, magnesium, aluminum, platinum and copper.
The reflective sheet 13 includes a plurality of openings for exposing the micro light emitting diodes 122. The reflector 13 is disposed on the micro led lamp panel 12 to expose each micro led, so as to ensure that the micro led can emit light smoothly. The reflector 13 has the property of reflecting light, so that light emitted by the micro light emitting diode to the back plate 11 side or light reflected by elements in the backlight module to the back plate side can be reflected by the reflector 13 to the light emitting side again, thereby improving the utilization efficiency of the light source.
The reflector plate is because of the quantity of punching that needs is many, and the more ordinary LED backlight reflector plate of technology is complicated, when consequently being applied to jumbo size display device, can't adopt the attached mode of a whole reflector plate, the embodiment of the utility model provides an in, process the size of reflector plate 13 according to the size of miniature emitting diode lamp plate 12 to set up a plurality of reflector plates 13 on miniature emitting diode lamp plate 12 through the concatenation mode, the concatenation seam between two adjacent reflector plates 13 is second concatenation seam S2.
The diffusion plate 14 is located on the light-emitting side of the micro led lamp panel 12, and has a certain distance from the reflector 13, and the shape of the diffusion plate 14 is the same as that of the micro led lamp panel 12. The diffuser plate 14 may be provided in a rectangular or square shape in a general case.
The diffuser plate 14 functions to scatter incident light, making the light passing through the diffuser plate 14 more uniform. The diffusion plate 14 is provided with scattering particle materials, and light incident to the scattering particle materials can be refracted and reflected continuously, so that the effect of scattering the light is achieved, and the effect of light homogenization is achieved.
The diffusion plate 14 has higher haze and more uniform effect, and can be processed by an extrusion process, and the material of the diffusion plate 14 is generally selected from at least one of polymethyl methacrylate (PMMA), Polycarbonate (PC), polystyrene material (PS), and polypropylene (PP).
The optical film 15 is located on a side of the diffusion plate 14 away from the reflection sheet 13, and the optical film 15 is disposed in a whole layer, and has the same shape as the micro led lamp panel 12, and may be generally disposed in a rectangular or square shape.
The optical film 15 can make the backlight module suitable for various practical applications.
In the embodiment of the present invention, the micro light emitting diode in the micro light emitting diode lamp panel 12 can be blue light micro light emitting diode, and the optical film 15 includes a quantum dot layer or a fluorescent layer.
The quantum dot layer comprises a red quantum dot material and a green quantum dot material, the red quantum dot material emits red light under the excitation of blue light, the green quantum dot material emits green light under the excitation of the blue light, and the red light, the green light and the transmitted blue light which are emitted by excitation are mixed to form white light for emitting.
The fluorescent layer comprises fluorescent materials which are stimulated to emit red light and green light, and the stimulated red light, the green light and the transmitted blue light are mixed into white light to be emitted.
In addition, the optical film 15 may further include a prism sheet, which can change the exit angle of light, thereby changing the viewable angle of the display device.
The optical film 15 may further include a reflective polarizer, which is a brightness enhancement film, and can improve the brightness of the backlight module, improve the utilization efficiency of light, and make the emergent light have polarization property, thereby omitting the use of the polarizer under the liquid crystal display panel.
The diffuser 14 is required to cover all the area where the micro led lamp panel 12 is located, and has a relatively large size, and is easily subject to collapse, warping and deformation, which deteriorates the optical characteristics of the backlight module, and even damages the micro leds 122, so the diffuser bracket 16 is usually disposed between the reflector 13 and the diffuser 14 for supporting the diffuser 14.
The diffuser plate holder 16 is typically made of polycarbonate PC.
In practical implementation, the diffuser plate holder 16 may be in the shape of a triangle, a trapezoid, a cone, etc., which are simple in shape, and is not limited herein.
Fig. 3 is a schematic cross-sectional view of a backlight module in the prior art. FIG. 4 is a partial top view of a backlight module in the prior art.
Referring to fig. 3 and 4, in the prior art, the shape of the reflector 13 is the same as that of the micro led lamp panel 12, and the reflector 13 is disposed on the micro led lamp panel 12 by splicing. Wherein first concatenation seam S1 between two adjacent miniature emitting diode lamp plates 12 and the coincidence of second concatenation seam S2 between two adjacent reflector plates 13, such design can lead to the second concatenation seam S2 position of reflector plate 13 among the backlight unit, and the light that is also the first concatenation seam S1 position of miniature emitting diode lamp plate 12 can't be reeflected and recycled and the dark line appears equally, leads to backlight unit display area luminance inhomogeneous, thereby influence display device' S display effect.
In view of this, as shown in fig. 2, in the display device provided in the embodiment of the present invention, the first splicing seam S1 and the second splicing seam S2 are disposed in a direction perpendicular to the back plate 11 and do not overlap with each other. Second concatenation seam S2 of reflector plate 13 falls on the reflector layer 123 of miniature emitting diode lamp plate 12 upper surface, stagger with first concatenation seam S1 between miniature emitting diode lamp plate 12, reflector layer 123 has the nature of carrying out the reflection to light, consequently, the light that miniature emitting diode 122 sent out passes through reflector plate 13 'S second concatenation seam S2 time, light is utilized once more through reflector layer 123 reflection, avoid producing the shadow, improve the luminous efficiency who is shaded, improve display device' S display effect.
Fig. 5 is a partial top view of a backlight module according to an embodiment of the present invention.
Referring to fig. 5, the embodiment of the present invention provides a backlight module in which the micro led lamp panel 12 and the reflector plate 13 both include a side edge extending along the first direction x and the second direction y, the first direction x and the second direction y are perpendicular to each other, and for ensuring that the first splicing seam S1 and the second splicing seam S2 do not overlap each other, and the number of the second splicing seams S2 is reduced as much as possible (less number of reflector plates 13 are provided), in an embodiment of the present invention, the width of the reflector plate 13 in at least one direction of the first direction x and the second direction y is greater than the width of the micro led lamp panel 12.
As shown in fig. 5, the width of the reflector 13 in the first direction x is greater than the width of the micro led lamp panel 12 in the first direction x, and the width of the reflector 13 in the second direction y is equal to the width of the micro led lamp panel 12 in the second direction y, so that it can be ensured that the second splicing seams S2 arranged in the first direction x of the reflector 13 are staggered with the first splicing seams S1 arranged in the first direction x of the micro led lamp panel 12, and at this time, when light emitted from the micro led 122 passes through the second splicing seams S2 of the reflector 13, the light is reflected by the reflective layer 123 and reused, thereby avoiding generating shadows, improving the light extraction efficiency of backlight, and improving the display effect of the display device.
Referring to fig. 5, the embodiment of the present invention provides a backlight module applicable to a small display device, which includes three micro led lamp panels 12, the three micro led lamp panels 12 are arranged along the first direction x, so that two reflectors 13 can be disposed, specifically, the width of the reflector 13 on the first direction x is 1.5 times the width of the micro led lamp panel 12 on the first direction x, so that the two reflectors 13 have the same size as the three micro led lamp panels 12.
Fig. 6 is a second partial top view of the backlight module according to the embodiment of the present invention.
Referring to fig. 6, an embodiment of the present invention provides a backlight module in which the width of the reflector plate 13 in the first direction x is greater than the width of the micro led lamp panel 12 in the first direction x, and the width of the reflector plate 13 in the second direction y is different from the width of the micro led lamp panel 12 in the second direction y. Therefore, the first splicing seams S1 in the first direction x and the second direction y can be guaranteed to be completely shielded by the reflector plate 13 to the maximum extent, the second splicing seams S2 of the reflector plate 13 arranged in the first direction x are staggered with the first splicing seams S1 of the miniature light-emitting diode lamp panel 12 arranged in the first direction x, the second splicing seams S2 of the reflector plate 13 arranged in the second direction y are staggered with the first splicing seams S1 of the miniature light-emitting diode lamp panel 12 arranged in the second direction y, at the moment, when light emitted by the miniature light-emitting diode 122 passes through the second splicing seams S2 of the reflector plate 13, the light is reflected by the reflective layer 123 and reused, the generation of dark shadows is avoided, the backlight light extraction efficiency is improved to the maximum extent, and the display effect of the display device is improved.
Comparing fig. 5 and 6, the backlight module shown in fig. 6 can be applied to a large-size display device, and the micro light emitting diode lamp panels 12 are arranged in an array in the first direction x and the second direction y. Then, the micro led lamp panel 12 may generate a first splicing seam S1 in both the first direction x and the second direction y, and in order to make the second splicing seam S2 generated by the reflector 13 and the first splicing seam S1 dislocated with each other, as shown in fig. 6, the width of the reflector 13 in the first direction x may be set to be larger than the size of the micro led lamp panel 12, and the width of the reflector in the second direction y may be smaller than the width of the micro led lamp panel 12.
The embodiment of the utility model provides a quantity of reflector plate 13 is less than miniature emitting diode lamp plate 12 quantity, sets up the quantity that can reduce second concatenation seam S2 like this, makes more light reflected by reflector plate 13 of high reflectivity, improves the light-emitting efficiency who is shaded to improve display device' S display effect.
The size and specification of each reflector plate 13 are the same, and a plurality of dies are not needed for processing, so that the cost can be reduced.
According to the first utility model discloses think about, backlight unit includes the backplate, a plurality of miniature emitting diode lamp plates and a plurality of reflector plate, first concatenation seam between two adjacent miniature emitting diode lamp plates and the second between two adjacent reflector plates splice seam mutually not overlapping, the second of reflector plate splices the seam and falls on the reflector layer of miniature emitting diode lamp plate upper surface, stagger with the first concatenation seam between miniature emitting diode lamp plate, the reflector layer has the nature that carries out the reflection to the light, therefore the light that miniature emitting diode sent out is when the second of reflector plate splices the seam, light is through reflector layer reflection reuse, avoid producing the shadow, improve the luminous efficiency who is shaded, improve display device's display effect.
According to the second utility model design, miniature emitting diode lamp plate includes: the LED comprises a circuit board, a micro LED, a reflecting layer and a packaging layer; the surface of the circuit board is coated with a reflective layer with reflective property, and the reflective layer is an insulating protective layer and has the function of protecting the circuit board. The position of the bonding pad for welding the micro light-emitting diode is exposed by the reflecting layer through the processes of etching and the like, and an opening for exposing the micro light-emitting diode is formed. The reflective layer is made of white ink, and the reflectivity of the white ink is greater than or equal to 85%.
According to the third utility model discloses think about, the reflector plate is greater than the width of miniature emitting diode lamp plate at least in the ascending width of one side in first direction and second direction, can guarantee first concatenation seam and second concatenation seam mutually not overlapping to reduce the quantity of second concatenation seam as far as possible, set up the reflector plate of still less quantity.
According to the fourth utility model discloses think about, the width of reflector plate on the first direction is greater than the width of miniature emitting diode lamp plate on the first direction, the width of reflector plate on the second direction equals the width of miniature emitting diode lamp plate on the second direction, can guarantee like this that the second concatenation seam that the reflector plate was arranged at the first direction staggers with the first concatenation seam that miniature emitting diode lamp plate was arranged at the first direction, the light that miniature emitting diode sent out this moment is when the second concatenation seam of reflector plate, light is utilized once more through the reflector layer reflection, avoid producing the shadow, improve the luminous efficiency who is shaded, improve display device's display effect.
According to the fifth novel concept, when being applied to a small display device, the backlight module comprises three micro light-emitting diode lamp panels, the three micro light-emitting diode lamp panels are arranged along the first direction, so that two reflectors can be arranged, specifically, the width of the reflector in the first direction is 1.5 times of the width of the micro light-emitting diode lamp panel in the first direction, and therefore the size of the two reflectors is the same as that of the three micro light-emitting diode lamp panels.
According to the sixth utility model discloses think about, the width of reflector plate on the first direction is greater than the width of miniature emitting diode lamp plate on the first direction, and the width of reflector plate on the second direction is different with the width of miniature emitting diode lamp plate on the second direction. Therefore, the first splicing seams in the first direction and the second direction can be guaranteed to be completely shielded by the reflector plate to the maximum extent, the second splicing seams arranged in the first direction of the reflector plate are staggered with the first splicing seams arranged in the first direction of the micro light-emitting diode lamp plate, the second splicing seams arranged in the second direction of the reflector plate are staggered with the first splicing seams arranged in the second direction of the micro light-emitting diode lamp plate, light emitted by the micro light-emitting diode passes through the second splicing seams of the reflector plate at the moment, the light is reflected by the reflecting layer to be reused, the generation of a shadow is avoided, the backlight light-emitting efficiency is improved to the maximum extent, and the display effect of the display device is improved.
According to the seventh utility model discloses think, the quantity of reflector plate is less than miniature emitting diode lamp plate quantity, sets up the quantity that can reduce the second concatenation seam like this, makes more light reflected by the reflector plate of high reflectivity, improves the luminous efficiency that is shaded to improve display device's display effect.
According to the eighth utility model, the reflector plate size is the same with the specification, does not need a plurality of mould processing, can reduce cost.
According to the ninth utility model, the size of the micro light emitting diode is below 500 μm, which is beneficial to controlling the dynamic light emitting of the backlight module to a smaller partition, thereby realizing more refined dynamic control and improving the dynamic contrast of the display device.
According to the tenth utility model, the reflectivity of reflector plate is greater than or equal to 94%, and the light of miniature emitting diode to backplate one side outgoing, perhaps by the component reflection in the backlight unit back to the light of backplate one side, can be reflected to light one side again by the reflector plate of high reflectivity, improves the utilization efficiency of light source from this.
While the preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the appended claims be interpreted as including the preferred embodiment and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A display device, comprising:
a display panel for image display;
the backlight module is positioned at the light incidence side of the display panel and used for providing backlight;
the backlight module includes:
the back plate has supporting and bearing functions;
the miniature light-emitting diode lamp panels are positioned on one side of the backboard; the miniature light-emitting diode lamp panels are spliced with one another, and a splicing seam between every two adjacent miniature light-emitting diode lamp panels is a first splicing seam;
the plurality of reflector plates are positioned on one side of the miniature light-emitting diode lamp panel, which deviates from the back plate; the reflector plates are spliced with one another, and a splicing seam between every two adjacent reflector plates is a second splicing seam;
the first splicing seam and the second splicing seam are not overlapped with each other.
2. The display device of claim 1, wherein the micro light emitting diode lamp panel comprises:
the circuit board is positioned on the back plate and used for providing a driving signal;
a micro light emitting diode on the circuit board;
the light reflecting layer is positioned on one side of the circuit board close to the micro light-emitting diode; the light reflecting layer comprises an opening for exposing the micro light-emitting diode;
the packaging layer is positioned on the surface of the micro light-emitting diode and used for packaging and protecting the micro light-emitting diode; the packaging layer is provided with dot matrix patterns corresponding to the micro light-emitting diodes one by one;
the reflector plate is positioned on one side of the light reflecting layer, which is far away from the back plate, and the reflector plate comprises an opening used for exposing the micro light-emitting diode.
3. The display device according to claim 2, wherein the reflective layer is made of white ink;
the white ink has a reflectance of greater than or equal to 85%.
4. The display device according to claim 3, wherein a reflectance of the reflective sheet is 94% or more.
5. The display device of claim 1, wherein the micro light emitting diode lamp panel and the reflector plate are square or rectangular in shape, and each of the micro light emitting diode lamp panel and the reflector plate includes sides extending in a first direction and a second direction; the first direction and the second direction intersect; the width of reflector plate in one of first direction and second direction at least is greater than the width of miniature emitting diode lamp plate.
6. The display device of claim 5, wherein a width of the reflector plate in the first direction is greater than a width of the micro light emitting diode lamp panel in the first direction, and a width of the reflector plate in the second direction is equal to the width of the micro light emitting diode lamp panel in the second direction.
7. The display device of claim 6, wherein a width of the reflector sheet in the first direction is 1.5 times a width of the micro light emitting diode lamp panel in the first direction.
8. The display device of claim 5, wherein a width of the reflector plate in the first direction is greater than a width of the micro light emitting diode lamp panel in the first direction, and a width of the reflector plate in the second direction is different from the width of the micro light emitting diode lamp panel in the second direction.
9. The display device as claimed in claim 5, wherein the number of the reflectors is smaller than the number of the micro light emitting diode lamp panels.
10. The display device of claim 2, wherein the micro light emitting diodes are less than 500 μm in size.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022825588.8U CN213399142U (en) | 2020-11-30 | 2020-11-30 | Display device |
| PCT/CN2021/081640 WO2021190399A1 (en) | 2020-03-25 | 2021-03-18 | Display device |
| PCT/CN2021/081681 WO2022088590A1 (en) | 2020-10-29 | 2021-03-19 | Display device |
| US17/656,965 US11822183B2 (en) | 2020-03-25 | 2022-03-29 | Display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022825588.8U CN213399142U (en) | 2020-11-30 | 2020-11-30 | Display device |
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| CN213399142U true CN213399142U (en) | 2021-06-08 |
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| CN202022825588.8U Active CN213399142U (en) | 2020-03-25 | 2020-11-30 | Display device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448123A (en) * | 2021-06-21 | 2021-09-28 | Tcl华星光电技术有限公司 | Backlight module and display device |
| CN113628548A (en) * | 2021-07-23 | 2021-11-09 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN114265237A (en) * | 2021-12-22 | 2022-04-01 | 绵阳惠科光电科技有限公司 | Backlight module and display device |
| CN114624808A (en) * | 2022-03-16 | 2022-06-14 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| WO2024000638A1 (en) * | 2022-07-01 | 2024-01-04 | 苏州华星光电技术有限公司 | Light-emitting substrate and display apparatus |
| WO2024103223A1 (en) * | 2022-11-14 | 2024-05-23 | Caspol Visual Technologies Limited | Display panel and manufacturing method thereof |
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2020
- 2020-11-30 CN CN202022825588.8U patent/CN213399142U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113448123A (en) * | 2021-06-21 | 2021-09-28 | Tcl华星光电技术有限公司 | Backlight module and display device |
| WO2022267110A1 (en) * | 2021-06-21 | 2022-12-29 | Tcl华星光电技术有限公司 | Backlight module and display apparatus |
| US11977253B2 (en) | 2021-06-21 | 2024-05-07 | Tcl China Star Optoelectronics Technology Co., Ltd. | Backlight module including overlapped reflective sheets and display device including the same |
| CN113628548A (en) * | 2021-07-23 | 2021-11-09 | 深圳市华星光电半导体显示技术有限公司 | Display panel and preparation method thereof |
| CN114265237A (en) * | 2021-12-22 | 2022-04-01 | 绵阳惠科光电科技有限公司 | Backlight module and display device |
| CN114624808A (en) * | 2022-03-16 | 2022-06-14 | 广州华星光电半导体显示技术有限公司 | Backlight module and display device |
| WO2024000638A1 (en) * | 2022-07-01 | 2024-01-04 | 苏州华星光电技术有限公司 | Light-emitting substrate and display apparatus |
| WO2024103223A1 (en) * | 2022-11-14 | 2024-05-23 | Caspol Visual Technologies Limited | Display panel and manufacturing method thereof |
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