CN109407403B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN109407403B CN109407403B CN201811558484.6A CN201811558484A CN109407403B CN 109407403 B CN109407403 B CN 109407403B CN 201811558484 A CN201811558484 A CN 201811558484A CN 109407403 B CN109407403 B CN 109407403B
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- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 15
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- 239000002390 adhesive tape Substances 0.000 description 6
- 239000004973 liquid crystal related substance Substances 0.000 description 6
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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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a backlight module and a display device, which relate to the technical field of display and comprise: a reflective sheet and a plurality of LEDs; the reflector comprises a groove body, a special-shaped edge, a first edge and a second edge, wherein the first edge is opposite to the special-shaped edge, the second edge is adjacent to the special-shaped edge, the special-shaped edge protrudes towards the first edge to form the groove body, and the LED is positioned on one side, far away from the groove body, of the second edge; the reflector plate comprises a main body area and a first area adjacent to the main body area, the area of the first area is smaller than that of the main body area, and the first area is also adjacent to the groove body and is positioned on one side, far away from the LED, of the groove body; the reflectivity of the part of the reflector plate positioned in the first area is larger than that of the part of the reflector plate positioned in the body area. The reflectivity of the reflector plate in the area with weak brightness is improved, the light density of the area with weak brightness is enhanced, and the phenomenon that a display screen has a dark shadow is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module and a display device.
Background
In a conventional display device, such as a monitor, a television, a mobile phone, a tablet computer, etc., a display area of the display device is generally a regular rectangle, and a plurality of sub-pixels are disposed in the display area in an array.
In recent years, with the development of science and technology, the display device with the display panel has more and more extensive applications, so that the requirements of people on the display panel are more and more diversified, the requirements are not only met with the conventional performance indexes of the display panel, such as large size, high definition and the like, but also the requirements on the appearance of the display panel are more diversified, and therefore, the special-shaped display panel appears.
The appearance of the special-shaped display panel breaks through the limitation of a single rectangular structure of the display panel, not only is the display effect more diversified, but also the application way of the display panel is more and more extensive, and the special-shaped display panel is successfully applied to wearable electronic designs such as watches, glasses or intelligent bracelets.
Since liquid crystal does not emit light, an external backlight module and a display device are required to realize a display function in various liquid crystal display devices such as a liquid crystal display screen and a liquid crystal television. When the special-shaped display panel is applied to the liquid crystal display device, the corresponding backlight module also presents a special-shaped structure, and the appearance of the special-shaped backlight module can cause the display panel to have a phenomenon of local shadows and influence the display effect of the display device.
Disclosure of Invention
In view of this, the present invention provides a backlight module and a display device, so as to improve the reflectivity of a reflector corresponding to an area where a shadow may appear in the backlight module, facilitate to improve the light uniformity of the backlight module, and improve the phenomenon that a display screen of the display device with an irregular structure has a local shadow, thereby facilitating to improve the display effect of the display device.
In a first aspect, the present application provides a backlight module, comprising: a reflective sheet and a plurality of LEDs;
the reflector plate comprises a groove body, a special-shaped edge, a first edge and a second edge, wherein the first edge is opposite to the special-shaped edge, the second edge is adjacent to the special-shaped edge, the special-shaped edge protrudes towards the first edge to form the groove body, and the LED is positioned on one side, far away from the groove body, of the second edge;
the reflector plate comprises a main body area and a first area adjacent to the main body area, the area of the first area is smaller than that of the main body area, and the first area is also adjacent to the groove body and is positioned on one side, far away from the LED, of the groove body;
the reflectivity of the part of the reflector plate positioned in the first area is larger than that of the part of the reflector plate positioned in the body area.
In a second aspect, the present application provides a display device, including a display panel, where the display panel is the display panel provided in the present application.
Compared with the prior art, the backlight module and the display device provided by the invention at least realize the following beneficial effects:
in the backlight module and the display device provided by the application, the reflector plate in the backlight module comprises a main body area and a first area adjacent to the main body area, wherein the area of the first area is smaller than that of the main body area, and the first area is also adjacent to the groove body and is positioned on one side of the groove body away from the LED; because the sheltering from of cell body, the light quantity that can propagate the first district is less, leads to the area source homogeneity that backlight unit provided to be relatively poor, easily leads to its applied display device's region to appear the shadow phenomenon, influences display device's display effect. Therefore, the reflectivity of the reflector corresponding to the area where the shadow possibly appears in the backlight module is improved, namely, the reflectivity of the reflector corresponding to the first area is improved, so that the reflectivity of the part, located in the first area, of the reflector is larger than that of the part, located in the main body area, of the reflector, the improvement of the reflectivity of the area is beneficial to improving the reflectivity of light emitted to the first area by the LED, namely, the reflectivity of the first area is improved, the brightness of the first area is beneficial to improving, and the brightness difference between the first area and the main body area is beneficial to reducing. Therefore, promote the reflectivity of the part that the reflector plate is located the first district among the backlight unit of this application, the reflectivity that is equivalent to the reflector plate with the less weak district of luminance among the prior art improves, make it can reflect more light, thereby increase the luminance in this region, it is more even to make backlight unit be the area source that display device provided, thereby be favorable to improving the phenomenon that display device appears the shadow, promote display device's luminance homogeneity, and then be favorable to promoting display device's display effect.
Of course, it is not necessary for any product in which the present invention is practiced to achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a top view of a backlight module provided in the prior art;
fig. 2 is a top view of a backlight module according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a first region on a reflector in a backlight module according to an embodiment of the present disclosure;
FIG. 4 is an AA' cross-sectional view of the backlight module provided in FIG. 2;
fig. 5 is a schematic view of a reflector in a backlight module according to an embodiment of the present disclosure;
fig. 6 is a schematic view of a second reflective sheet in the backlight module according to the embodiment of the present disclosure;
fig. 7 is another schematic view of a second reflective sheet in the backlight module according to the embodiment of the disclosure;
FIG. 8 is a schematic view illustrating a backlight module according to an embodiment of the present disclosure, in which a reflector is fixed on a substrate;
fig. 9 is a structural diagram of a display device provided in an embodiment of the present application;
fig. 10 is a BB' cross-sectional view of the display device provided in the embodiment of the present application.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For the phenomenon that the appearance of the special-shaped backlight module can cause the display panel to have local shadows, the inventor carries out the following research on the backlight module provided by the prior art:
fig. 1 is a top view of a backlight module provided in the prior art, in which the backlight module 100 is a side-in type backlight module, that is, an LED101 lamp is located at one side of a reflector 102, the reflector 102 has a special-shaped structure, and a side edge 105 of the reflector is recessed into the reflector to form a notch 103 under the viewing angle shown in fig. 1. When the LED101 lamp emits light, the first region 104 above the notch 103 of the reflective sheet 102 is far from the LED101 lamp, and the light emitted from the LED101 is blocked by the notch 103, so that the brightness is low. This causes the light provided by the backlight module 100 to the display device to be non-uniform, and the display device may have a dark shadow during the display process, thereby reducing the display effect.
In view of this, the present invention provides a backlight module and a display device, so as to improve the reflectivity of a reflector corresponding to an area where a shadow may appear in the backlight module, facilitate to improve the light uniformity of the backlight module, and improve the phenomenon that a display screen of the display device with an irregular structure has a local shadow, thereby facilitating to improve the display effect of the display device.
The following description is made in connection with the accompanying drawings and the specific embodiments.
Fig. 2 is a top view of a backlight module according to an embodiment of the present disclosure, which provides a backlight module 200 including: a reflective sheet 201 and a plurality of LEDs 202;
the reflective sheet 201 comprises a slot 203, a shaped edge 204, a first edge 205 disposed opposite the shaped edge 204, and a second edge 206 disposed adjacent to the shaped edge 204, the shaped edge 204 protrudes toward the first edge 205 to form the slot 203, and the LED202 is disposed on a side of the second edge 206 away from the slot 203;
the reflective sheet 201 comprises a body region 208 and a first region 207 adjacent to the body region 208, the area of the first region 207 is smaller than that of the body region 208, and the first region 207 is also adjacent to the slot 203 and located on a side of the slot 203 away from the LED 202;
the reflectivity of the portion of the reflective sheet 201 located in the first region 207 is greater than that of the portion located in the body region 208.
It should be noted that fig. 2 only schematically shows a structure in which the backlight module 200 includes one slot 203, the position of the slot 203 may be flexibly set according to actual requirements, and the number of the slots 203 may also be two or more, which is not described in detail in the embodiment of the present invention. The shape and size of the slot 203 can also be designed according to specific practical requirements, and the embodiment is not particularly limited. In addition, fig. 2 also shows only a few LEDs 202 located at the side of the reflective sheet 201, and does not represent actual size and number.
Specifically, with reference to fig. 2, in this embodiment, the reflective sheet 201 in the backlight module 200 is divided into two regions, including a main body region 208 and a first region 207 adjacent to the main body region 208, the area of the first region 207 is far smaller than that of the main body region 208, and the first region 207 is also adjacent to the slot 203 and is located on a side of the slot 203 away from the LED 202; after the appearance of the special-shaped display panel, the corresponding reflective sheet 201 in the backlight module 200 may also present a special-shaped structure, and due to the shielding of the slot 203, the amount of light that can be transmitted to the first region 207 is small, which results in poor uniformity of the surface light source provided by the backlight module, and easily results in the occurrence of a shadow phenomenon in the region of the display device to which the backlight module is applied, thereby affecting the display effect of the display device. The reflectivity of the portion of the reflective sheet 201 located in the first region 207 is set to be greater than the reflectivity of the portion of the reflective sheet 201 located in the body region 208, and the reflectivity of light in the first region 207 is improved by improving the reflection efficiency of the reflective sheet 201 of the first region 207 where the shadow is likely to appear. It should be noted that the reflectivity of the reflective sheet 201 in the first region 207 may be uniform or non-uniform, and this embodiment is not limited in particular. When the reflectivity of the reflective sheet 201 in the first region 207 is not uniform, the reflectivity of the portion of the reflective sheet 201 in the first region 207 is greater than the reflectivity of the portion of the reflective sheet 201 in the body region 208, which means that the reflectivity of any portion of the reflective sheet 201 in the first region 207 is greater than the reflectivity of the portion of the reflective sheet 201 in the body region 208. Compared with the prior art, the luminance of first district 207 can be promoted to be favorable to reducing the luminance difference between first district 207 and the second district 208, make backlight unit 200's luminance more even, make it can provide more even area light source for display panel, be favorable to improving the phenomenon that display device appears the shadow, promote display device's luminance homogeneity, improve display device's display effect.
Optionally, referring to fig. 3, fig. 3 is a schematic view of a first region on a reflector in a backlight module provided in the present embodiment, in the backlight module 200 provided in the present embodiment, the first region 207 includes a first sub-region 301 and at least one second sub-region 302, the first sub-region 301 is adjacent to the slot 203, and the second sub-region 302 is located on a side of the first sub-region 301 away from the slot 203;
the reflectivity of the portion of the reflective sheet 201 located in the first sub-zone 301 is greater than the reflectivity of the portion located in the second sub-zone 302.
Specifically, the first region 207 on the reflective sheet 201 includes a first sub-region 301 and at least one second sub-region 302, that is, the first region 207 may be divided into two or more sub-regions, which is not limited in this embodiment of the present invention, and the number of the first regions 207 may be divided according to actual situations, and fig. 3 only illustrates that the first region 207 includes one first sub-region 301 and one second sub-region 302. In the first region 207 of the reflective sheet 201, the first sub-region 301 is adjacent to the groove 203, the second sub-region 302 is located on the side of the first sub-region 301 away from the groove 203, because the groove 203 has different blocking effects on the light emitted from the LED202 to the first region 207, in the first region 207, the degree of the dark shadow is stronger near the side of the groove 203 away from the LED202, and is relatively weakened away from this region, that is, when the reflectivity of the reflective sheet 201 is not adjusted, the brightness of the first sub-region 301 is darker than that of the second sub-region 302, so when the reflectivity of the part of the first sub-region 301 is set to be greater than that of the part of the reflective sheet located in the second sub-region 302, it is beneficial to improve the reflectivity of the first sub-region 301, reduce the brightness difference between the first sub-region 301 and the second sub-region 302, and because the reflectivity of the part of the reflective sheet 201 located in the first sub-region 301 and the second sub-region 302 is greater than that, therefore, the brightness difference between the first region 207 and the main body region 208 can be reduced, and thus, the reflectivity of the reflector 201 of the first region 207 is correspondingly improved according to the difference of the degree of the dark shadow, so that the brightness of the backlight module 200 is more uniform, the brightness uniformity of the display device is improved, and the phenomenon of the dark shadow of the display device is improved.
Optionally, referring to fig. 4, fig. 4 is an AA' cross-sectional view of the backlight module provided in fig. 2, in the backlight module 200 provided in the embodiment of the present application, the reflector 201 is integrally formed, the backlight module 200 further includes a reflective material 209 disposed on a side of the reflector 201 facing the light emitting surface of the backlight module 200, and the reflective material 209 is located in the first region 207.
Specifically, referring to fig. 2 and fig. 4, the reflective sheet 201 in the backlight module 200 is divided into the body region 208 and the first region 207, and optionally, the first region 207 is further divided into the first sub-region 301 and the second sub-region 302, and the reflective sheet 201 is integrally formed during manufacturing, so that the manufacturing process of the reflective sheet 201 is simplified, and the reflective sheet 201 is conveniently produced integrally in practical applications. The backlight module 200 further includes a reflective material 209 disposed on a side of the reflective sheet 201 facing the light-emitting surface of the backlight module 200, the reflective material 209 is disposed in the first region 207, and the reflective material 209 disposed in the first region 207 is used to change the reflectivity of the first region 207 on the reflective sheet 201, on this basis, the reflectivity of the first sub-region 301 and the second sub-region 302 corresponding to the first region 207 can be set to be the same by adding the reflective material 209, and the reflectivity of the first sub-region 301 can also be set to be greater than the reflectivity of the second sub-region 302, so as to differentially increase the reflectivity of the first region 207 on the reflective sheet 201, so that the backlight module 200 can provide a more uniform surface light source for the display device, and improve the phenomenon of the display device appearing dark shadows.
Optionally, with reference to fig. 4, in the backlight module 200 provided in the embodiment of the present application, the light reflective material 209 is white oil or white glue.
Specifically, the reflective material 209 disposed in the first region 207 of the reflector 201 may be made of white oil or white glue, the white oil has chemical inertness and good light stability, the white glue has good stability and is not easy to age, the white oil or white glue is used as the reflective material 209, the light reflectivity of the first region 207 may be effectively improved, the light emitted from the LED202 to the first region 207 is reflected by the white oil or white glue, most of the light may be reflected to the light-emitting surface of the backlight module 200, thereby increasing the reflectivity of the first region 207, and reducing the brightness difference between the first region 207 and the main body region 208 in the backlight module 200, thereby facilitating the backlight module 200 to provide a more uniform surface light source for the display device, and further effectively improving the phenomenon of the display device appearing dark shadow.
Optionally, referring to fig. 5, fig. 5 is a schematic view of a reflector plate in the backlight module provided in the embodiment of the present application; in the backlight module 200 provided in the embodiment of the application, the reflective sheet 201 includes a first reflective sheet 402 and a second reflective sheet 401 that are spliced with each other, the first reflective sheet 402 is located in the body region 208, the second reflective sheet 401 is located in the first region 207, and the reflectivity of the second reflective sheet 401 is greater than the reflectivity of the first reflective sheet 402.
Specifically, please refer to fig. 5, the reflective sheet 201 is composed of a first reflective sheet 402 and a second reflective sheet 401 spliced with each other, the first reflective sheet 402 is located in the main body region 208, and the reflectivity of the first reflective sheet 402 is smaller than the reflectivity of the second reflective sheet 401, the second reflective sheet 401 is located in the first region 207, and the amount of light that can be transmitted to the first region 207 is relatively small due to the shielding of the slot 203, therefore, the second reflective sheet 401 with higher reflectivity is disposed in the first region 207, so that the second reflective sheet 401 can reflect more light to the light-emitting surface of the backlight module 200, and the first reflective sheet 402 and the second reflective sheet 401 are disposed respectively according to different positions and different reflectivity requirements, and the first reflective sheet 402 and the second reflective sheet 401 with different reflectivity are spliced to form an integral reflective sheet 201, so as to purposefully improve the brightness of the first region 207 with weaker light, the uniformity of the light emitted by the backlight module 200 is improved, thereby being beneficial to improving the display effect of the display device. It should be noted that, in order to distinguish the first reflective sheet 402 from the second reflective sheet 401 more clearly, in fig. 5, there is a certain gap between the first reflective sheet 402 and the second reflective sheet 401, and in fact, there is no gap between the first reflective sheet 402 and the second reflective sheet 401. The first reflector plate 402 and the second reflector plate 401 can be spliced in a seamless splicing mode without using any bonding material, so that the assembly process during the production of the backlight module is simplified, and the efficiency of batch production is improved. Of course, if necessary, the first reflective sheet 402 and the second reflective sheet 401 may be bonded by an optical adhesive, which is not particularly limited in this application.
Optionally, with reference to fig. 5, in the backlight module 200 provided in the embodiment of the present application, the reflective sheet 201 includes a second reflective sheet 401.
Specifically, in order to facilitate manufacturing of the reflective sheet 201 according to different requirements, the reflective sheet 201 includes a second reflective sheet 401, the second reflective sheet 401 is located in the first region 207 with a weaker brightness, the first reflective sheet 402 is located in the body region 208, and the reflectivity of the second reflective sheet 401 is greater than the reflectivity of the first reflective sheet 402, so as to improve the reflectivity of light emitted from the LEDs 202 to the first region 207, increase the reflectivity of the first region 207, and further improve the brightness of the first region 207, so that the brightness of the first region 207 is approximately the same as the brightness of the body region 208, thereby facilitating improvement of the phenomenon of occurrence of a dark shadow in the display device. It should be noted that, while increasing the brightness of the first region 207, in order to make the brightness of the first region 207 more uniform, the reflectivity of the second reflective sheet 401 located in the first region 207 may be gradually changed, for example, the reflectivity of the second reflective sheet 401 is gradually decreased from a side close to the trough 203 to a side far away from the trough 203.
Fig. 5 shows a case where a second reflector 401 is disposed in the first area 207, and in addition to this structure, optionally, referring to fig. 6, fig. 6 is a schematic view of a second reflector in the backlight module provided in this embodiment of the present disclosure, in the backlight module 200 provided in this embodiment of the present disclosure, the second reflector 401 includes a second reflector 501 and at least one second diethyl reflector 502, the second reflector 501 is located in the first sub-area 301, the second diethyl reflector 502 is located in the second sub-area 302, and a reflectivity of the second reflector 501 is greater than a reflectivity of the second diethyl reflector 502.
Specifically, the second reflective sheet 401 may be divided into a second reflective sheet 501 and one or more second reflective sheets 502 according to different degrees of shadows appearing in actual situations, which is not specifically limited in this embodiment, and may be changed accordingly according to requirements of actual situations; the second reflector 501 is arranged in the first sub-area 301 which generates the darkest shadow region and the second reflector 502 is arranged in the second sub-area 302 which has higher brightness than the first sub-area 301 and weaker brightness than the main body area 208, the first sub-area 301 is adjacent to the groove 203 and receives less light considering that the first sub-area 301 and the second sub-area 302 in the first area 207 can receive more light compared with the first sub-area 301, so that the second reflector 501 and the second reflector 502 with different reflectivity are respectively arranged in the first sub-area 301 and the second sub-area 302, the manufacture is convenient according to different requirements of the second reflector, and then the second reflector 401 is formed into a whole by splicing, wherein the second reflector 501 can reflect more light due to the higher reflectivity of the second reflector 501, therefore, the brightness difference between the first sub-area 301 and the second sub-area 302 is reduced, so that the brightness of the first area 207 with weaker brightness is improved in a targeted manner, the brightness uniformity of light emitted by the backlight module 200 is improved, and the display effect of the display device is improved.
Optionally, referring to fig. 7, fig. 7 is another schematic view of a second reflective sheet in the backlight module provided in the embodiment of the present application, in the backlight module 200 provided in the embodiment of the present application, the reflectivity of the same second reflective sheet 502 is the same; the reflectance of the different second reflective sheets 502 decreases from the side close to the tank 203 to the side away from the tank 203.
Specifically, taking the embodiment shown in fig. 7 as an example, the second reflective sheet 401 includes a second reflective sheet 501 and two second reflective sheets 502, namely a second reflective sheet 5021 and a second reflective sheet 5022, and the reflectivities of the same second reflective sheet are the same; from the side close to the slot 203 to the side far away from the slot 203, the degree of occurrence of dark areas is different due to different blocking amounts of the light emitted by the LED202 by the slot 203, and the reflectivity of the second reflective sheet 502 in different areas is set to be a decreasing trend. Compare second diethyl reflection piece 5021, second diethyl reflection piece 5022 is far away from cell body 203, the light that second diethyl reflection piece 5021 corresponds the region is darker, consequently the reflectivity that is greater than second diethyl reflection piece 5022 that sets up the reflectivity of second diethyl reflection piece 5021, make the region that corresponds second diethyl reflection piece 5021 can reflect more light, with the luminance difference between reducing second diethyl reflection piece 5021 and second diethyl reflection piece 5022, be favorable to reducing the luminance difference between each region in first region 207, and then be favorable to reducing the luminance difference between first region 207 and the second region 208, consequently, be favorable to promoting the homogeneity of the light that backlight unit 200 provided to display device more, thereby be favorable to improving the phenomenon that the display device appears the shadow, promote display device's display effect.
Optionally, referring to fig. 8, fig. 8 is a schematic view illustrating a backlight module 200 according to an embodiment of the present disclosure, in which a second reflective sheet 401 has a thickness equal to that of a first reflective sheet 402.
Specifically, the thickness of the second reflective sheet 401 is the same as the thickness of the first reflective sheet 402, so that when the first reflective sheet 402 and the second reflective sheet 401 are attached to the substrate 601 of the backlight module 200, the overall flatness of the reflective sheet 201 can be maintained, a flat reflective film is provided for light, and the light is emitted from the same horizontal plane of the reflective sheet 201 to the light emitting surface of the backlight module 200.
Optionally, with reference to fig. 8, the backlight module 200 according to the embodiment of the present disclosure further includes a substrate 601, and the first reflective sheet 402 and the second reflective sheet 401 are fixed on a side of the substrate 601 facing the light emitting surface of the backlight module 200.
Specifically, the backlight module 200 includes a substrate 601 for fixing the reflector 201, and the first reflector 402 and the second reflector 401 are fixed on a side of the substrate 601 facing the light emitting surface of the backlight module 200, so that the reflector 201 can be stably fixed at a necessary position in the backlight module and faces the light emitting surface of the backlight module, thereby facilitating to efficiently reflect the emitted light to the light emitting surface of the backlight module, enabling the display device to efficiently receive the light reflected by the reflector 201, and facilitating to improve the display effect of the display device. The specific positions at which the first reflective sheet 402 and the second reflective sheet 401 are fixed on the substrate 601 are determined by actual conditions, and may be adjusted appropriately according to different conditions, and this embodiment is not specifically defined herein.
Optionally, referring to fig. 8, in the backlight module 200 provided in the embodiment of the present disclosure, the first reflective sheet 402 and the substrate 601, and the second reflective sheet 401 and the substrate 601 are adhered by the double-sided tape 602.
Specifically, the first reflective sheet 402 and the substrate 601, and the second reflective sheet 401 and the substrate 601 are adhered by the double-sided adhesive tape 602, the double-sided adhesive tape 602 has a negligible thickness, and the light transmittance of the double-sided adhesive tape 602 is high, so that any influence on the light reflection efficiency of the reflective sheet 201 can be avoided, and the first reflective sheet 402 and the second reflective sheet 401 are stably fixed on the substrate 601, which is beneficial to maintaining the stability of the light reflection effect of the reflective sheet 201, and further, the display effect of the display device is improved. It should be noted that in the backlight module provided in the embodiment of the present application, the entire surface of the double-sided adhesive tape 602 may be covered on the substrate 601, and then the first reflective sheet 402 and the second reflective sheet 401 are fixed on the double-sided adhesive tape 602, so that the entire surface of the reflective sheet is more flat; of course, in some other embodiments of the present application, the double-sided adhesive tape may be disposed only in a region where the first reflective sheet 402 and the second reflective sheet 401 interface, and this is not particularly limited in this application.
Based on the same inventive concept, the present application further provides a display device 700, please refer to fig. 9 and fig. 10, fig. 9 is a structural diagram of the display device provided in the embodiment of the present application, fig. 10 is a BB' cross-sectional view of the display device provided in the embodiment of the present application, the display device 700 includes a display panel 701 and a backlight module 200, the backlight module 200 is any one of the backlight modules 200 provided in the embodiments of the present application, and the display panel 701 is a liquid crystal display panel. Specifically, the display panel 701 is located on a side of the backlight module 200 facing a light emitting surface of the display device 700, and it should be noted that fig. 9 only schematically shows a relative position relationship between the display panel 701 and the backlight module 200, and does not represent an actual film structure. It should be noted that, in the embodiment of the display device 700 provided in the present application, reference may be made to the embodiment of the backlight module 200, and repeated descriptions are omitted. The display device 700 provided by the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like.
Optionally, referring to fig. 9, the display device of the present invention is provided with a slot 203 for installing a camera 702 and/or an optical sensor 703, so as to meet the requirement of the consumer on the display device in social development and also facilitate to improve the practicability of the display device. In addition, set up camera and/or optical sensor in the cell body, still be favorable to realizing the display effect of full face screen, be favorable to display device's high integration.
By the embodiment, the backlight module and the display device provided by the invention at least realize the following beneficial effects:
in the backlight module and the display device provided by the application, the reflector plate in the backlight module comprises a main body area and a first area adjacent to the main body area, wherein the area of the first area is smaller than that of the main body area, and the first area is also adjacent to the groove body and is positioned on one side of the groove body away from the LED; because the sheltering from of cell body, the light quantity that can propagate the first district is less, leads to the area source homogeneity that backlight unit provided to be relatively poor, easily leads to its applied display device's region to appear the shadow phenomenon, influences display device's display effect. Therefore, the reflectivity of the reflector corresponding to the area where the shadow possibly appears in the backlight module is improved, namely, the reflectivity of the reflector corresponding to the first area is improved, so that the reflectivity of the part, located in the first area, of the reflector is larger than that of the part, located in the main body area, of the reflector, the improvement of the reflectivity of the area is beneficial to improving the reflectivity of light emitted to the first area by the LED, namely, the reflectivity of the first area is improved, the brightness of the first area is beneficial to improving, and the brightness difference between the first area and the main body area is beneficial to reducing. Therefore, promote the reflectivity of the part that the reflector plate is located the first district among the backlight unit of this application, the reflectivity that is equivalent to the reflector plate with the less weak district of luminance among the prior art improves, make it can reflect more light, thereby increase the luminance in this region, it is more even to make backlight unit be the area source that display device provided, thereby be favorable to improving the phenomenon that display device appears the shadow, promote display device's luminance homogeneity, and then be favorable to promoting display device's display effect.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A backlight module, comprising: a reflective sheet and a plurality of LEDs;
the reflector plate comprises a groove body, a special-shaped edge, a first edge and a second edge, wherein the first edge is opposite to the special-shaped edge, the second edge is adjacent to the special-shaped edge, the special-shaped edge protrudes towards the first edge to form the groove body, and the LED is positioned on one side, far away from the groove body, of the second edge;
the reflector plate comprises a main body area and a first area adjacent to the main body area, the area of the first area is smaller than that of the main body area, and the first area is also adjacent to the groove body and is positioned on one side, far away from the LED, of the groove body;
the reflectivity of the part of the reflector plate positioned in the first area is greater than that of the part of the reflector plate positioned in the body area;
the first area comprises a first sub-area and at least one second sub-area, the first sub-area is adjacent to the trough body, and the second sub-area is positioned on one side, away from the trough body, of the first sub-area;
the reflectivity of the part of the reflector plate positioned in the first sub-area is larger than that of the part of the reflector plate positioned in the second sub-area;
the backlight module also comprises a reflective material, and the reflective material is positioned in the first area;
or,
the reflective sheet includes a second reflective sheet located in the first region.
2. The backlight module as claimed in claim 1, wherein the reflector plate is integrally formed, and the light-reflecting material is disposed on a side of the reflector plate facing the light-emitting surface of the backlight module.
3. The backlight module as claimed in claim 2, wherein the light reflecting material is white oil or white glue.
4. The backlight module as claimed in claim 1, wherein the reflective sheet comprises a first reflective sheet mutually connected with a second reflective sheet, the first reflective sheet is located in the body region, and the reflectivity of the second reflective sheet is greater than that of the first reflective sheet.
5. A backlight module according to claim 4, wherein the reflector plate comprises one of the second reflector plates.
6. The backlight module as claimed in claim 4, wherein the second reflector comprises a second reflector and at least a second diethyl reflector, the second reflector is located in the first sub-region, the second diethyl reflector is located in the second sub-region, and the reflectivity of the second reflector is greater than that of the second diethyl reflector.
7. The backlight module as claimed in claim 6, wherein the same second reflective film has the same reflectivity; the reflectivity of different second diethyl reflection sheets decreases from one side close to the groove body to one side far away from the groove body.
8. The backlight module as claimed in claim 4, wherein the second reflective sheet has a thickness equal to that of the first reflective sheet.
9. The backlight module as claimed in claim 4, further comprising a substrate, wherein the first and second reflective sheets are fixed on a side of the substrate facing the light emitting surface of the backlight module.
10. The backlight module according to claim 9, wherein the first reflective sheet and the substrate and the second reflective sheet and the substrate are adhered by a double-sided adhesive.
11. A display device comprising the backlight module of any one of claims 1 to 10.
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| CN201811558484.6A CN109407403B (en) | 2018-12-19 | 2018-12-19 | Backlight module and display device |
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| CN201811558484.6A CN109407403B (en) | 2018-12-19 | 2018-12-19 | Backlight module and display device |
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| CN109407403A CN109407403A (en) | 2019-03-01 |
| CN109407403B true CN109407403B (en) | 2021-07-16 |
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| CN109979392B (en) * | 2019-04-30 | 2021-03-02 | 京东方科技集团股份有限公司 | Time sequence control method, time sequence control module and display device |
| CN110471217B (en) * | 2019-07-23 | 2022-01-14 | 厦门天马微电子有限公司 | Display module and display device |
| CN114355668A (en) * | 2021-12-27 | 2022-04-15 | 广州华星光电半导体显示技术有限公司 | Backlight module and display module |
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| WO2017061312A1 (en) * | 2015-10-05 | 2017-04-13 | シャープ株式会社 | Illumination device and display device |
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| CN108873129A (en) * | 2018-06-25 | 2018-11-23 | 深圳市华星光电技术有限公司 | Reflector plate, side entrance back module and liquid crystal display |
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| WO2017061312A1 (en) * | 2015-10-05 | 2017-04-13 | シャープ株式会社 | Illumination device and display device |
| CN207034834U (en) * | 2017-07-31 | 2018-02-23 | 北京京东方茶谷电子有限公司 | A kind of backlight module and display device |
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