CN113296309A - Display device - Google Patents
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- CN113296309A CN113296309A CN202010110727.0A CN202010110727A CN113296309A CN 113296309 A CN113296309 A CN 113296309A CN 202010110727 A CN202010110727 A CN 202010110727A CN 113296309 A CN113296309 A CN 113296309A
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- light
- light emitting
- opening
- circuit board
- reflecting layer
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Images
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
Abstract
The invention discloses a display device, comprising: the backlight module is used for providing backlight; the display panel is positioned on the light emitting side of the backlight module and used for displaying images; the backlight module includes: the back plate has supporting and bearing functions; the light bar is positioned on the back plate; the reflector plate is positioned on one side of the light bar, which is far away from the back plate; wherein, lamp strip includes: a circuit board for providing a driving signal; a light emitting device on the circuit board; the width of the light-emitting device in the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board in the direction perpendicular to the extending direction of the light bar; the reflective sheet includes: a plurality of openings for exposing the light emitting devices, the size of the openings being larger than that of the light emitting devices; the back plate exposed from the opening is provided with a first light reflecting layer. The first reflecting layer has the function of reflecting light, and the light can be reflected to the light-emitting side by the first reflecting layer even if the light is incident on the back plate in the opening, so that the loss of the light can be avoided, and the optical efficiency is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device.
Background
The lcd panel is a non-self-luminous type of display panel, and needs to be matched with a backlight module to provide backlight to display images. The backlight module is divided into a direct type backlight module and a side type backlight module according to the structural form. The direct type backlight module is widely applied to the liquid crystal display television due to the advantages of good light-emitting visual angle, high utilization rate, simple structure, low cost and the like.
In order to increase the utilization rate of the light source, a reflective sheet is usually disposed on the light exit side of the light source in the direct-type backlight module, and the light source is exposed by an opening on the reflective sheet. Therefore, the light emitted by the light source is reflected after being incident to the optical film layer on the light emitting side, and can be reflected to the light emitting side again by the reflecting sheet, so that the utilization efficiency of the light source is improved. However, the opening of the reflector plate is generally larger than the light source, which results in that the light reflected between the light source and the reflective opening can not be reflected to the light-emitting side any more, resulting in light loss and affecting the optical efficiency.
Disclosure of Invention
The invention provides a display device for improving the optical efficiency of a backlight module.
The present invention provides a display device including:
the backlight module is used for providing backlight;
the display panel is positioned on the light emitting side of the backlight module and used for displaying images;
the backlight module includes:
the back plate has supporting and bearing functions;
the light bar is positioned on the back plate;
the reflector plate is positioned on one side of the light bar, which is far away from the back plate;
wherein, the lamp strip includes:
a circuit board for providing a driving signal;
a light emitting device on the circuit board;
the width of the light-emitting device in the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board in the direction perpendicular to the extending direction of the light bar;
the reflective sheet includes: a plurality of openings for exposing the light emitting devices, the openings having a size larger than that of the light emitting devices;
a first light reflecting layer is arranged on the back plate exposed out of the opening.
In some embodiments of the present disclosure, in the display device provided in the present disclosure, a second reflective layer is disposed on the circuit board exposed by the opening.
In some embodiments of the present application, the first light reflecting layer and the second light reflecting layer are made of the same material.
In some embodiments of the present application, the material of the first light reflecting layer and the second light reflecting layer is white ink.
In some embodiments of the present application, the first light reflecting layer and the second light reflecting layer have a reflectivity of greater than 90% in the display device provided by the present invention.
In some embodiments of the present application, in the display apparatus provided by the present invention, the light emitting device includes:
the light emitting diode is positioned on the circuit board;
the lens is positioned on the light emitting side of the light emitting diode;
the width of the lens along the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board along the direction perpendicular to the extending direction of the light bar; the size of the opening is larger than the size of the lens.
In some embodiments of the present application, the display device provided by the present invention has a central symmetrical shape of the lens and the opening.
In some embodiments of the present application, in the display device provided by the present invention, a shape of the opening is the same as a shape of the lens;
the difference between the aperture of the opening and the aperture of the lens is greater than or equal to 5 mm.
In some embodiments of the present application, in the display device provided by the present invention, the opening has a circular shape;
the first light reflecting layer is rectangular, circular, semicircular or fan-shaped.
In some embodiments of the present application, in the display device provided in the present invention, the backlight module further includes:
the diffusion plate is positioned on one side, away from the light bar, of the reflection sheet, and a set distance is reserved between the diffusion plate and the reflection sheet;
and the optical membrane is positioned on one side of the diffusion plate, which is far away from the reflection sheet.
The invention has the following beneficial effects:
the present invention provides a display device including: the backlight module is used for providing backlight; the display panel is positioned on the light emitting side of the backlight module and used for displaying images; the backlight module includes: the back plate has supporting and bearing functions; the light bar is positioned on the back plate; the reflector plate is positioned on one side of the light bar, which is far away from the back plate; wherein, lamp strip includes: a circuit board for providing a driving signal; a light emitting device on the circuit board; the width of the light-emitting device in the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board in the direction perpendicular to the extending direction of the light bar; the reflective sheet includes: a plurality of openings for exposing the light emitting devices, the size of the openings being larger than that of the light emitting devices; the back plate exposed from the opening is provided with a first light reflecting layer. The first reflecting layer has the function of reflecting light, and the light can be reflected to the light-emitting side by the first reflecting layer even if the light is incident on the back plate in the opening, so that the loss of the light can be avoided, and the optical efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed 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 it is obvious for those skilled in the art that other drawings can be obtained according to the 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 top view of a backlight module according to an embodiment of the present invention;
fig. 3 is a second schematic top view of a backlight module according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a light-emitting device provided in an embodiment of the present invention;
FIG. 5 is a partial enlarged view of an opening provided in an embodiment of the present invention;
FIG. 6 is a second enlarged view of the opening of the container according to the embodiment of the present invention;
FIG. 7 is a third enlarged view of a portion of the opening according to the embodiment of the present invention;
fig. 8 is a schematic cross-sectional structure view of a backlight module according to an embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is 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 expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.
The liquid crystal display panel is a non-self-luminous panel and needs to be matched with a backlight module for use. The direct type backlight module is widely applied to the liquid crystal display device due to the advantages of good light-emitting visual angle, high utilization rate, simple structure, low cost and the like. In order to reduce the cost of the backlight module, the width of the light bar in the backlight module is usually made to be narrow as much as possible, so that after the light bar is covered with the reflecting sheet, more back plates are exposed outside in the opening of the reflecting sheet, and the exposed back plates are not covered by the reflecting sheet, so that the reflecting efficiency is greatly reduced, light is lost, and the optical efficiency is influenced.
In view of this, embodiments of the present invention provide a display device for improving the optical efficiency of a backlight module.
Fig. 1 is a schematic cross-sectional structure diagram of a display device according to an embodiment of the present invention, and as shown in fig. 1, the display device according to the embodiment of the present invention includes:
a backlight module 100 for providing backlight; the backlight module 100 can uniformly emit light in the whole light emitting surface, and is used for providing light with sufficient brightness and uniform distribution for the display panel, so that the display panel can normally display images.
The display panel 200 is located on the light emitting side of the backlight module 100 for displaying images. 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 display device provided by the embodiment of the invention can be a display device such as a liquid crystal display screen, a liquid crystal display, a liquid crystal television and the like, and can also be a mobile terminal such as a mobile phone, a tablet personal computer, an intelligent photo album and the like. The display device adopts the backlight module to provide backlight, and the display panel modulates the light emitted by the backlight module to realize image display. The backlight module provided by the embodiment of the invention can be used for partitioning and independently dimming the light source in each partition, thereby realizing more refined dynamic control and improving the dynamic contrast of liquid crystal display.
Fig. 2 is a schematic top view of a backlight module according to an embodiment of the present invention, and as shown in fig. 2, the backlight module according to the embodiment of the present invention includes:
and the back plate 11 has supporting and bearing functions.
The back plate 11 of the backlight module is used for carrying various optical components thereon, and has a heat dissipation function, and can be generally made of a metal material. As shown in fig. 2, the backlight module provided in the embodiment of the invention is a direct-type backlight module, so that when the back plate is manufactured, the periphery of the back plate can be tilted upward to form an inclined surface, which is beneficial to receiving the wide-angle light emitted from the light source and reflecting the light to the light-emitting side of the backlight module, thereby improving the utilization efficiency of the light source.
And the light bar 12 is positioned on the back plate 11.
The backlight module usually uses the light bars 12 as a backlight source, and in the direct type backlight module, the light bars 12 can be arranged in parallel to provide a light source.
And the reflector 13 is positioned on one side of the light bar 12, which faces away from the back plate 11.
A reflector is arranged on one side of the light bar 12, which is far away from the back plate 11, and an opening is arranged on the reflector 13 to expose the position of the light source. The reflector 13 can reflect the light reflected by the optical film or the like back to the light bar 12 side of the backlight module to the light emitting side again, thereby improving the utilization efficiency of the light source.
As shown in fig. 2, the light bar 12 provided by the embodiment of the present invention includes: a circuit board 121 and a light emitting device 122.
And a circuit board 121 for providing a driving signal.
The circuit board 121 is used to provide a driving electrical signal for the light emitting device 122. The light emitting device 122 may be electrically connected to the circuit board 121 by soldering. The Circuit Board 121 may be a Printed Circuit Board (PCB for short), the backlight module may include a plurality of light bars, each light bar includes a strip-shaped PCB, and the light emitting device 122 is soldered on the PCB. And each lamp strip is according to the direction parallel arrangement who sets for, through the interval between the control lamp strip to and the interval between the last light emitting device 122 of every circuit board 121, can design the backlight unit who is used for different scene display device, through the use quantity of control light emitting device 122, also can control backlight unit's cost.
And a light emitting device 122 on the circuit board 121.
The light emitting device 122 is used as a light source to emit light, the light emitting device 122 is soldered on the circuit board 121, and the circuit board 121 provides a driving signal for the light emitting device 122. The brightness of the backlight module can be adjusted by adjusting the spacing between the light bars 12 and the number of the light emitting devices 122 on each light bar 12. The light emitting devices 122 on the light bar 12 can be partitioned, and the light emitting devices in each partition can be independently controlled, so that the display effect of the display device can be optimized by matching with the local dimming technology.
In the backlight module provided in the embodiment of the invention, as shown in fig. 2, the width of the light emitting device 122 along the direction perpendicular to the extending direction of the light bar 12 is greater than the width of the circuit board 121 along the direction perpendicular to the extending direction of the light bar.
In order to reduce the cost of the circuit board 121, the width of the circuit board 121 may be reduced without affecting the driving circuit of the circuit board, which makes the width of the circuit board 121 smaller than the width of the light emitting device 122, so that a portion of the back plate 11 is exposed at the two side edges of the light emitting device 122.
As shown in fig. 2, the reflector 13 according to an embodiment of the present invention includes: a plurality of openings k for exposing the light emitting devices 122, the size of the openings k being greater than that of the light emitting devices 122.
The size of the opening k of the reflector 13 needs to be slightly larger than the size of the light emitting device 122, so that when the circuit board is displaced or stretched during installation or use, the edge of the opening k does not collide with the light emitting device 122, and the opening k can completely expose the light emitting device 122.
Since the size of the opening k of the reflective sheet 13 is larger than the size of the light emitting device 122, and the size of the light emitting device 122 is larger than the width of the circuit board 121, a part of the back plate 11 is inevitably exposed at the opening k, the reflectivity of the back plate 11 is far lower than that of the reflective sheet 13, and when light is incident to the back plate 11 in the opening k, the reflectivity is reduced, so that the light incident to the part of the back plate 11 is lost, and the light efficiency is lost.
Therefore, the first reflective layer 14 is disposed on the back plate 11 exposed by the opening k in the embodiment of the invention. The first light reflecting layer 14 has a function of reflecting light. The back plate is matched with parameters such as the size and the position of the light bar during manufacturing, so that the position of each light emitting device 122 on the light bar 12 mounted on the back plate can be determined after the back plate is manufactured, before the light bar 12 is mounted, a first reflective layer 14 is firstly coated on the corresponding position of the back plate 11 corresponding to the light emitting device 122, and the edge of the first reflective layer 14 can slightly exceed the edge of the opening k of the reflector 13. After the first reflective layer 14 is coated, the light bar 12 and the reflective sheet 13 are mounted such that the first reflective layer 14 is disposed on the rear panel 11 exposed in the opening k of the reflective sheet 13. Even if the light enters the back plate in the opening k, the light can be reflected to the light-emitting side by the first light-reflecting layer 14, so that the light can be prevented from being lost, and the optical efficiency is improved.
Fig. 3 is a third schematic view of a top view structure of the backlight module according to the embodiment of the present invention, and as shown in fig. 3, a second reflective layer 15 is further disposed on the circuit board 121 exposed by the opening k of the backlight module according to the embodiment of the present invention.
The circuit board 121 is manufactured to expose the pads for soldering the light emitting devices 122, so that the position of each light emitting device 122 can be determined after the circuit board 121 is manufactured, before the light emitting devices 122 are soldered, a second light reflecting layer 15 may be coated at a position corresponding to the edge of the light emitting device 122, and the edge of the second light reflecting layer 15 may slightly exceed the edge of the opening k of the reflector 13. After the second light reflecting layer 15 is applied, the light emitting device 122 is soldered such that the second light reflecting layer 15 is disposed on the circuit board 121 exposed in the opening k of the reflector 13. Even if the light enters the circuit board in the opening k, the light can be reflected to the light-emitting side by the second light-reflecting layer 15, so that the light can be prevented from being lost, and the optical efficiency can be further improved.
In order to ensure that the first light reflecting layer 14 and the second light reflecting layer 15 in the opening have consistent reflectivity, the first light reflecting layer 14 and the second light reflecting layer 15 may be made of the same material in the embodiment of the present invention. Therefore, the light can be ensured to have the same reflectivity at any position of the incident light into the opening k, and the uneven brightness caused by the inconsistent reflectivity at different positions is avoided.
In specific implementation, white ink may be used as the material of the first reflective layer 14 and the second reflective layer 15. The white ink contains titanium dioxide as a component with light reflection property, the titanium dioxide and a colloid material can be mixed with each other, and then the colloid material is coated on the back plate 11 and the circuit board 121 in the opening k.
The purpose of adjusting the reflectivity can be achieved by adjusting the proportion of the titanium dioxide, and in order to avoid light loss in the opening, in the embodiment of the invention, the reflectivity of the first light-emitting layer 14 and the second light-emitting layer 15 can be adjusted to be larger than 90%, so that light incident into the opening can be effectively reflected, and the optical efficiency is improved.
Fig. 4 is a schematic structural diagram of a light emitting device according to an embodiment of the present invention, and as shown in fig. 4, a light emitting device 122 according to an embodiment of the present invention includes:
and the light emitting diode 1221 is positioned on the circuit board 121.
The light emitting diode 1221 uses a solid semiconductor chip as a light emitting material, and compared with a conventional lamp, the light emitting diode is energy-saving, environment-friendly, and has better color rendering and response speed, and is widely used as a light source in a backlight module. However, the intensity of light emitted from the led 1221 is concentrated in a small emission angle, and a lens 1222 may be disposed on the light emitting side of the led 1221 to make the emitted light more uniform.
And a lens 1222 positioned at a light emitting side of the light emitting diode 1221.
The lens 1222 may be a free-form lens, for example, as shown in fig. 4, the lens 1222 may be a refractive lens having a receiving cavity on a side facing the led 1221, the led 1221 being located in the receiving cavity. The refractive lens may have a central symmetrical shape, and may homogenize light emitted from the light emitting diode 1221 in all directions.
In the embodiment of the present invention, the size of the led 1221 is small, and in the micrometer range, the led 1221 is soldered on the circuit board 121 through the electrodes, so the size of the led 1221 is generally smaller than the width of the circuit board 121. And the lens 1222 diffuses the light emitted from the led 1221 to expand the emitting angle of the light. In order to facilitate the design of the lens, in the embodiment of the present invention, the width of the lens 1222 in the direction perpendicular to the extending direction of the light bar 12 is greater than the width of the circuit board 121 in the direction perpendicular to the extending direction of the light bar 12; and the size of the opening k is larger than the size of the lens 1222. That is, the lens 1222 determines the maximum size of the light emitting device 122, and the edge of the lens 1222 may exceed the edge of the circuit board 121.
Fig. 5 is a partial enlarged view of the opening k according to an embodiment of the present invention, and as shown in fig. 5, the lens 1222 and the opening k are both shaped in a central symmetrical pattern. Taking fig. 5 as an example, the lens 1222 may be designed to be circular, and the opening k of the reflective sheet 13 may be designed to be square. In practical applications, the lens 1222 is generally designed to be circular, and the center of the lens 1222 coincides with the light emitting center of the led 1221, so as to adapt to the shape of the lens 1222, the opening k on the reflector 13 may also be designed to be centrosymmetric, and the center of the opening k coincides with the light emitting center of the led 1221. This simplifies the machining and makes it easier to align the components during installation.
Besides, the shape of the opening k may also be designed to be the same as that of the lens 1222, fig. 6 is a second partial enlarged view of the opening provided by the embodiment of the present invention, and as shown in fig. 6, the lens 1222 and the opening k may be both provided in a circular shape. The aperture of the lens 1222 is usually set to about 15mm, and the aperture of the opening k of the reflection sheet 13 may be set to at least about 20 mm. This ensures that the edges of the opening k are at a distance from the lens to prevent collision with each other. Then it is ensured that the difference between the aperture of the opening k and the aperture of the lens 1222 is greater than or equal to 5mm in design.
As shown in fig. 6, the opening k of the reflector 13 and the lens 1222 are both circular, so that the first reflective layer 14 on the back plate can be rectangular, and the second reflective layers 15 on both sides of the circuit board leds 1221 can also be rectangular. In addition, the first light reflecting layer 14 and the second light reflecting layer 15 may be provided in a circular shape, which is not limited herein.
When the first reflective layer 14 and the second reflective layer 15 are arranged, the edge of the first reflective layer 14 only needs to slightly exceed the edge of the back plate exposed in the opening k, and the edge of the second reflective layer 15 only needs to slightly exceed the edge of the circuit board exposed in the opening k, and the first reflective layer 14 and the second reflective layer 15 do not need to be excessively large in size, so that the production cost is saved.
Fig. 7 is a third enlarged view of the opening provided in the embodiment of the present invention, and as shown in fig. 7, the opening k is configured to be circular, so that the first light reflecting layer 14 can also be designed to match the shape of the circular edge. As shown in fig. 7, the first reflective layer 14 may be configured in two semi-circles, which are respectively located at the upper and lower sides of the circuit board; in addition, the first reflective layer 14 can be set into two sectors respectively located at the upper and lower sides of the circuit board, so that the exposed back plate in the opening k has high reflectivity, and the loss of light is avoided.
Fig. 8 is a schematic cross-sectional structure view of a backlight module according to an embodiment of the present invention, and as shown in fig. 8, the backlight module according to the embodiment of the present invention further includes:
and the diffusion plate 16 is positioned on one side of the reflection sheet 13, which is far away from the light bar, and is away from the reflection sheet 13 by a set distance.
The distance from the light emitting device 122 to the diffusion plate 16 satisfies the light mixing distance of the light emitting device 122. A sufficient distance is provided between the light emitting devices 122 and the diffuser 16 to sufficiently mix the emergent light rays of the adjacent light emitting devices 122, so that the brightness near the light emitting center of the light emitting device 122 is substantially the same as the brightness at the boundary position between the adjacent light emitting devices 122.
The diffuser 16 serves to further homogenize the light emitted from the light emitting device 122. The diffusion plate 16 is usually provided with a scattering particle material, and after the light enters the diffusion plate, the scattering particle material continuously refracts and reflects the light, so as to achieve the effect of scattering the light, and further achieve the effect of light uniformization. The material of the diffuser plate is generally at least one selected from the group consisting of polymethyl methacrylate (PMMA), Polycarbonate (PC), polystyrene-based material (PS), and polypropylene (PP), but not limited thereto.
And the optical film 17 is positioned on the side of the diffusion plate 16, which faces away from the reflection sheet 13.
The optical film 17 may include a quantum dot film, a prism film, a reflective polarizer, and the like, which are not limited herein.
The quantum dot film can be matched with a monochromatic light emitting device to meet higher color gamut requirements. The light emitting device 122 may emit blue light, and the quantum dot film layer may include red and green quantum dot materials therein. The red quantum dot material emits red light under excitation of blue light, and the green quantum dot material emits green light under excitation of blue light. The red light and the green light emitted by the quantum dot film layer are combined with the transmitted blue light to be mixed into white light, so that backlight is provided for the display panel.
The prism sheet can change the emergent angle of the light, for example, the emergent light can be converged to a front view angle, so that the light emitted by the backlight module is relatively collimated.
The reflective polarizer can improve the utilization rate of light, and simultaneously, the emergent light has polarization property, thereby omitting the use of the polarizer under the liquid crystal display panel.
The present invention provides a display device including: the backlight module is used for providing backlight; the display panel is positioned on the light emitting side of the backlight module and used for displaying images; the backlight module includes: the back plate has supporting and bearing functions; the light bar is positioned on the back plate; the reflector plate is positioned on one side of the light bar, which is far away from the back plate; wherein, lamp strip includes: a circuit board for providing a driving signal; a light emitting device on the circuit board; the width of the light-emitting device in the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board in the direction perpendicular to the extending direction of the light bar; the reflective sheet includes: a plurality of openings for exposing the light emitting devices, the size of the openings being larger than that of the light emitting devices; the back plate exposed from the opening is provided with a first light reflecting layer. The first reflecting layer has the function of reflecting light, and the light can be reflected to the light-emitting side by the first reflecting layer even if the light is incident on the back plate in the opening, so that the loss of the light can be avoided, and the optical efficiency is improved.
While 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. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments 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 in the present invention 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 of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A display device, comprising:
the backlight module is used for providing backlight;
the display panel is positioned on the light emitting side of the backlight module and used for displaying images;
the backlight module includes:
the back plate has supporting and bearing functions;
the light bar is positioned on the back plate;
the reflector plate is positioned on one side of the light bar, which is far away from the back plate;
wherein, the lamp strip includes:
a circuit board for providing a driving signal;
a light emitting device on the circuit board;
the width of the light-emitting device in the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board in the direction perpendicular to the extending direction of the light bar;
the reflective sheet includes: a plurality of openings for exposing the light emitting devices, the openings having a size larger than that of the light emitting devices;
a first light reflecting layer is arranged on the back plate exposed out of the opening.
2. The display device of claim 1, wherein a second light reflecting layer is disposed on the circuit board exposed by the opening.
3. The display device of claim 2, wherein the first light reflecting layer and the second light reflecting layer are the same material.
4. The display device of claim 3, wherein the material of the first light reflecting layer and the second light reflecting layer is white ink.
5. The display device of claim 4, wherein the first light reflecting layer and the second light reflecting layer have a reflectivity of greater than 90%.
6. The display apparatus according to claim 1, wherein the light emitting device comprises:
the light emitting diode is positioned on the circuit board;
the lens is positioned on the light emitting side of the light emitting diode;
the width of the lens along the direction perpendicular to the extending direction of the light bar is larger than the width of the circuit board along the direction perpendicular to the extending direction of the light bar; the size of the opening is larger than the size of the lens.
7. The display device of claim 6, wherein the lens and the opening are each shaped in a centrosymmetric pattern.
8. The display device according to claim 7, wherein a shape of the opening is the same as a shape of the lens;
the difference between the aperture of the opening and the aperture of the lens is greater than or equal to 5 mm.
9. The display device of claim 8, wherein the opening is circular in shape;
the first light reflecting layer is rectangular, circular, semicircular or fan-shaped.
10. The display device according to any one of claims 1 to 9, wherein the backlight module further comprises:
the diffusion plate is positioned on one side, away from the light bar, of the reflection sheet, and a set distance is reserved between the diffusion plate and the reflection sheet;
and the optical membrane is positioned on one side of the diffusion plate, which is far away from the reflection sheet.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010110727.0A CN113296309A (en) | 2020-02-24 | 2020-02-24 | Display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010110727.0A CN113296309A (en) | 2020-02-24 | 2020-02-24 | Display device |
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