CN115373179B - Backlight module and display device with same - Google Patents
Backlight module and display device with same Download PDFInfo
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- CN115373179B CN115373179B CN202210962503.1A CN202210962503A CN115373179B CN 115373179 B CN115373179 B CN 115373179B CN 202210962503 A CN202210962503 A CN 202210962503A CN 115373179 B CN115373179 B CN 115373179B
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- lamp panel
- bottom wall
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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
- G02F1/133603—Direct backlight with LEDs
-
- 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
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
-
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
-
- 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
- G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Liquid Crystal (AREA)
Abstract
The invention provides a backlight module and a display device with the backlight module, the backlight module comprises: the backboard comprises a bottom wall and side walls, each side wall and the bottom wall jointly enclose an optical cavity, and the cross section of the bottom wall comprises an arc shape; the lamp panel is arranged on the bottom wall; the light-emitting sources are arranged on the lamp panel; an optical film positioned above the plurality of light sources; the light source comprises a back plate, a light source, an optical film, a plurality of luminous light sources, a plurality of optical films, a plurality of light-emitting light sources, a plurality of light-emitting light source and a plurality of optical films, wherein the section of the light plate is provided with at least two parts with inconsistent thickness, the distance between the luminous light sources and one side of the optical film, which is close to the back plate, is the effective light-mixing distance. By adopting the lamp panels with different local thicknesses, the effective light mixing distances of the luminous light sources are consistent, and the luminous light sources can emit light rays at the same height, so that the homogenization of the emergent light rays is facilitated, the problem of uneven display of the panel is solved on the basis of not changing the existing framework, and the requirement of the picture taste of the display panel is improved.
Description
[ field of technology ]
The invention relates to the technical field of display, in particular to a backlight module and a display device with the backlight module.
[ background Art ]
With the improvement of the living standard of people, the products of the Mini LED curved surface module are more and more sought after by consumers, the Mini LED curved surface module adopts more dense chip arrangement to reduce the light mixing distance, an ultrathin light source assembly and multiple partitions are realized, meanwhile, small-size chip products are utilized, the products of the organic light emitting diodes are comparable in the practical effect, and the materials cost can be more competitive than the products of the organic light emitting diodes, so that the Mini LED curved surface module is proposed for use.
However, the conventional Mini LED curved surface module is firstly applied to the hard lamination of a liquid crystal display panel by the TP hot bending technology, then is combined with a curved backlight, and the backlight is directly molded by adopting a curvature mold, but because the curved surface module has curvature, the lamp panel is flat, when the lamp panel is laminated with the bottom wall of the curved surface module, the stress at the middle part is maximum, and the problem that the lamp panel is deformed due to overlarge stress, so that the uneven display (mura) of the panel is caused exists.
Accordingly, the prior art has drawbacks and needs to be improved and developed.
[ invention ]
The invention provides a backlight module and a display device with the backlight module, which can improve the problem of uneven display of a panel.
In order to solve the above problems, the present invention provides a backlight module, comprising: the backboard comprises a bottom wall and side walls, each side wall and the bottom wall jointly enclose an optical cavity, and the cross section of the bottom wall comprises an arc shape; the lamp panel is arranged on the bottom wall; the light-emitting sources are arranged on the lamp panel; an optical film positioned above the plurality of light sources; the light source comprises a back plate, a light source, an optical film, a plurality of luminous light sources, a plurality of optical films, a plurality of light-emitting light sources, a plurality of light-emitting light source and a plurality of optical films, wherein the section of the light plate is provided with at least two parts with inconsistent thickness, the distance between the luminous light sources and one side of the optical film, which is close to the back plate, is the effective light-mixing distance.
The lamp panel is provided with a recess in part, and the luminous light source is positioned in the corresponding recess.
The part of the lamp panel is provided with a bulge, and the luminous light source is positioned on the corresponding bulge.
The lamp panel further comprises a heightening layer, and the protrusions are formed on the lamp panel through the heightening layer.
The lamp panel comprises a dark area and a bright area, the backlight module further comprises a light reflecting component, and the light reflecting component is located in the dark area.
The light reflecting component comprises a lamp panel copper layer or a white glue layer.
The luminous light source comprises a Mini LED luminous device.
Wherein, optical film includes:
a lower diffusion plate arranged above the luminous light source;
a quantum dot film layer on the lower diffusion plate;
the light enhancement sheet is positioned on the quantum dot film layer; the method comprises the steps of,
and an upper diffusion plate positioned on the brightness enhancement film.
In order to solve the above problems, the present invention provides a display device, which includes a backlight module as described in any one of the above, and a display panel adapted to the backlight module.
The display panel is a liquid crystal display panel.
The beneficial effects of the invention are as follows: compared with the prior art, the invention provides a backlight module and a display device with the backlight module, wherein the backlight module comprises: the backboard comprises a bottom wall and side walls, each side wall and the bottom wall jointly enclose an optical cavity, and the cross section of the bottom wall comprises an arc shape; the lamp panel is arranged on the bottom wall; the light-emitting sources are arranged on the lamp panel; an optical film positioned above the plurality of light sources; the light source comprises a back plate, a light source, an optical film, a plurality of luminous light sources, a plurality of optical films, a plurality of light-emitting light sources, a plurality of light-emitting light source and a plurality of optical films, wherein the section of the light plate is provided with at least two parts with inconsistent thickness, the distance between the luminous light sources and one side of the optical film, which is close to the back plate, is the effective light-mixing distance. By adopting the lamp panels with different local thicknesses, the effective light mixing distances of the luminous light sources are consistent, and the luminous light sources can emit light rays at the same height, so that the homogenization of the emergent light rays is facilitated, the problem of uneven display of the panel is solved on the basis of not changing the existing framework, and the requirement of the picture taste of the display panel is improved.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a backlight module according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of a display device provided in the prior art;
FIG. 3 is a schematic diagram of a backlight module with a deformed lamp panel in the prior art;
FIG. 4 is a diagram showing a mura generated by a backlight module according to the prior art;
FIG. 5 is a display image after the backlight module is improved according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a backlight module according to a second embodiment of the present invention.
[ detailed description ] of the invention
The invention is described in further detail below with reference to the drawings and examples. It is specifically noted that the following examples are only for illustrating the present invention, but do not limit the scope of the present invention. Likewise, the following examples are only some, but not all, of the examples of the present invention, and all other examples, which a person of ordinary skill in the art would obtain without making any inventive effort, are within the scope of the present invention.
Furthermore, the terms first, second, third and the like in accordance with the present invention may be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first may be referred to as a second, and similarly, a second may be referred to as a first, without departing from the scope of the invention. Accordingly, the terminology used is for the purpose of describing and understanding the invention and is not intended to be limiting of the invention. In the various drawings, like elements are designated by like reference numerals. For clarity, the various features of the drawings are not drawn to scale. Furthermore, some well-known portions may not be shown in the drawings.
In addition, in the respective drawings, units having similar structures are denoted by the same reference numerals. When an element is referred to as being "connected to" another element, it can be directly connected or be indirectly connected to the other element through an intervening element.
The present invention will be described in further detail with reference to the accompanying drawings, in order to make the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 1, a schematic structural diagram of a backlight module according to an embodiment of the present invention includes: the back plate 110, the back plate 110 includes a bottom wall 111 and side walls 112, each side wall 112 and the bottom wall 111 enclose an optical cavity together, the cross-sectional shape of the bottom wall 111 includes an arc; a lamp panel 120 disposed on the bottom wall 111; a plurality of light sources 130 disposed on the light panel 120; an optical film 140 positioned above the plurality of light emitting sources 130; the thicknesses of different parts of the light plate 120 are different, the distance between the light emitting sources 130 and the optical film 140 near the back plate 110 is an effective light mixing distance H, and the effective light mixing distances H of the light emitting sources 130 are consistent.
In addition, it should be noted that fig. 1 only shows the structure related to the embodiment of the present invention, and the backlight module of the present invention may further include other components and/or structures for implementing the complete functions of the backlight module.
Specifically, the backlight module includes a back plate 110 and a plurality of light sources 130, wherein the back plate 110 includes a bottom wall 111 and side walls 112, and each side wall 112 and the bottom wall 111 together define an optical cavity. Typically, the back plate 110 is composed of one bottom wall 111 and four side walls 112, i.e. the optical cavity is formed by one bottom wall 111 and four side walls 112 surrounding the bottom wall 111. The back plate 110 may be made of an opaque material, so as to realize a light shielding effect and avoid light leakage of the backlight module. The back plate 110 may also be made of a material with good thermal conductivity, so as to facilitate heat dissipation of the backlight module and reduce heat accumulation. The back plate 110 may also be made of a metal material, such as aluminum, aluminum alloy, stainless steel, etc. In addition, the backlight module may further include a glue frame 160, where the glue frame 160 is attached to the side wall 112 of the back plate 110.
As shown in fig. 2, a schematic structure of a display device provided in the prior art is shown, wherein a cover 410 (cover lens) is hard-attached to a display panel 420 by applying a TP hot bending technology, and then combined with a backlight module 430, so as to match the cover 410 and the display panel, and therefore, the backlight module is a curved surface module. The backlight module may be formed by using a curvature mold, but since the backlight module is a curved module, for example, the cross-sectional shape of the bottom wall 311 of the back plate 310 includes an arc shape, for example, the cross-sectional shape of the bottom wall 311 is an arc shape, that is, the bottom wall 311 has a certain curvature, and the lamp panel 320 is a flat plate. Based on this, when the flat light panel 320 is attached to the bottom wall 311 of the back plate 310, the bottom wall 311 is generally an iron shell, so that the deformation is small, the stress in the middle of the light panel 320 is maximum, and there is an excessive stress to deform the light panel 320 as shown in fig. 3, at this time, the distances between the plurality of light emitting sources 330 disposed on the deformed light panel 320 and the optical film 340 above are different from each other near the side of the back plate 310, so that there is a problem of uneven display (mura) in the middle area of the panel as shown in fig. 4.
Specifically, as shown in fig. 3, the backlight module of the prior art includes: the back plate 310, the back plate 310 comprises a bottom wall 311 and side walls 312, and each side wall 312 and the bottom wall 311 jointly enclose an optical cavity; the lamp panel 320 is disposed on the bottom wall 311; a plurality of light sources 330 disposed on the light plate 320; the optical film 340 is located above the plurality of light sources 330. The thickness of the light plate 320 is consistent, and the light plate 320 needs to be attached to the bottom wall 311 with curvature, so that the light plate 320 is easy to deform, and the effective light mixing distances H of the light emitting sources 330 are inconsistent. As shown in fig. 3, the effective light mixing area is located in the right area A1 of fig. 3, and the effective light mixing distances H of the plurality of light emitting sources 330 are not uniform. When the effective light mixing distances H of the plurality of light emitting sources 330 are not uniform, there is a problem in that display unevenness (mura) is present in the middle area of the display panel as shown in fig. 4.
Specifically, various marks due to uneven brightness appear on the display screen, collectively referred to as uneven display, from japanese "mottled" pronunciation, i.e., mura. The expression forms are mainly 3 types: first, a white screen sees a slightly dark display portion; secondly, a little white display part is visible on the dark picture; thirdly, the middle gray-scale picture is visible. When the effective light mixing distances H of the light emitting sources 330 in the backlight module are not uniform, the light provided to the panel is different in different areas, so that the display panel is prone to display unevenness (mura).
Based on this, by adopting the backlight module of the embodiment of the invention, the local thickness of the lamp panel 120 is adjusted to make the local thickness of the lamp panel 120 different, so that the effective light mixing distances H of the plurality of light emitting sources 130 on the lamp panel 120 are consistent, and the light emitting sources 130 are better ensured to emit light rays at the same height, thereby being beneficial to homogenizing the emergent light rays, improving the problem of uneven display of the panel on the basis of not changing the existing architecture, and improving the requirements of the picture taste of the display panel. The method for adjusting the local thickness of the light panel 120 may include, but is not limited to, reducing the local thickness of the light panel 120 or increasing the local thickness of the light panel 120, so long as the local thicknesses of the light panel 120 can be made different, so that the effective light mixing distances H of the plurality of light emitting sources 130 on the light panel 120 are consistent.
Fig. 5 shows a display image after the backlight module is improved in the embodiment of the invention. As can be seen from fig. 5, after the backlight module according to the embodiment of the invention is adopted, the display image is effectively improved, for example, mura problem in the middle area of the panel is improved, and uniformity of brightness in the middle area and the edge area is substantially uniform.
Wherein, part of the lamp panel 120 has protrusions (not shown in the drawings), and the light emitting sources 130 are positioned on the corresponding protrusions.
Specifically, as can be seen from the above, the local thickness of the light panel 120 can be adjusted to make the local thickness of the light panel 120 different, so that the effective light mixing distances H of the plurality of light emitting sources 130 on the light panel 120 are consistent. The effective light mixing distance H of the light emitting sources 130 on the lamp panel 120 may be uniform by locally providing the lamp panel 120 with protrusions, i.e., increasing the local thickness of the lamp panel 120. The manner of increasing the local thickness of the light panel 120 may be to use an integral light panel 120 having different local thicknesses, or to add some film layers to the local of the light panel 120, which is not particularly limited, so long as the local thickness of the light panel 120 is increased, so that the effective light mixing distances H of the plurality of light emitting sources 130 on the light panel 120 are consistent.
The lamp panel 120 further includes a raised layer 150, and the raised layer 150 is used to form a bump on the lamp panel 120.
Fig. 1 is a schematic structural diagram of a backlight module according to a first embodiment of the present invention. As can be seen from fig. 1, the effective light mixing distance H of the plurality of light emitting sources 130 on the lamp panel 120 is uniform by adding the raised layer 150 to the part of the lamp panel 120 and adding the local thickness of the lamp panel 120 to the raised layer 150.
Specifically, the material of the pad layer 150 may include copper or tin. The material of the lamp board 120 may be a glass fiber epoxy resin copper-clad plate (FR 4) or Polyimide (PI). The light emitting sources 130 may be welded to the light panel 120 by means of welding, and the thickness of the light panel 120 is increased by adding a welding material such as copper or tin to a part of the light panel 120, so as to compensate for the problem that the effective light mixing distances H of the light emitting sources 130 are inconsistent due to deformation of the light panel 120, thereby enabling the effective light mixing distances H of the light emitting sources 130 on the light panel 120 to be consistent.
The lamp panel 120 includes a dark area (not shown in the drawing) and a bright area (not shown in the drawing), and the backlight module further includes a light reflecting member 170, where the light reflecting member 170 is located in the dark area.
Specifically, the lamp panel 120 is divided into a dark area and a bright area (not shown in the drawing) according to the magnitude of brightness, wherein the brightness of the dark area is smaller than that of the bright area. By adding the light reflecting component 170 in the dark area of the lamp panel 120, the brightness of the dark area is increased through the reflection of the light reflecting component 170, the difference of the brightness of the dark area and the brightness of the bright area is reduced, the homogenization of the emergent light is facilitated, and the problem of uneven display of the panel is solved on the basis of not changing the existing framework. The reflecting member may be any structure having a function of reflecting light, and is not particularly limited.
Wherein, the light reflecting component 170 comprises a lamp panel copper layer or a white glue layer.
Specifically, the light reflecting component 170 may be a light panel copper layer or a white glue layer, where the light panel copper layer or the white glue layer has a light reflecting function, and the light emitted by the light emitting source 130 partially irradiates the light panel 120, and reflects through the light panel copper layer or the white glue layer, so as to increase the brightness of a dark area, reduce the difference between the brightness of the dark area and the brightness area, facilitate the homogenization of the light emitting light, and improve the uneven display problem of the panel on the basis of not changing the existing architecture. Wherein, the white glue layer can be formed by coating white oil or pasting white glue.
Wherein the light emitting source 130 comprises a Mini LED light emitting device.
Specifically, the light emitting source 130 may be a Mini LED light emitting device, such as a Mini LED light bead. By adopting the Mini LED light-emitting device, more dense chip arrangement can be adopted to reduce the light mixing distance, ultrathin light source components and multiple partitions are realized, meanwhile, small-size chip products are utilized, the product is comparable to the organic light-emitting diode products in the practical effect, and the material cost is more competitive than the organic light-emitting diode products. By employing Mini LED light emitting devices as the light emitting sources 130, the picture taste is improved without increasing the density of the light emitting sources 130 (such as beads).
Wherein, optical film 140 includes:
a lower diffusion plate 141 disposed above the light emitting source 130;
a quantum dot film layer 142 on the lower diffusion plate 141;
a light enhancement sheet 143 on the quantum dot film layer 142; the method comprises the steps of,
an upper diffusion plate 144 on the light enhancement sheet 143.
As shown in fig. 1, the optical film 140 may be a lower diffusion plate 141 disposed above the light emitting source 130; a quantum dot film layer 142 on the lower diffusion plate 141; a light enhancement sheet 143 on the quantum dot film layer 142; and an upper diffusion plate 144 on the light enhancement sheet 143. The backlight module may be a direct type, the light source 130 may be laid in the light cavity of the back plate 110, and the light emitted by the light source 130 is diffused by the lower diffusion plate 141, then the brightness of the light is increased by the incremental film, and then the light is diffused by the upper diffusion plate 144, and then the light is used as a backlight source. In addition, the optical film 140 may further include other functional film layers, such as an upper polarizer, a lower polarizer, etc., which are not described in detail herein. In addition, the light increasing sheet 143 may include an upper light increasing sheet 143 and a lower light increasing sheet 143, and in general, the light increasing sheet 143 further has a plurality of prism structures to further reduce loss of light, thereby increasing brightness of the light.
Unlike the backlight module according to the first embodiment of the present invention, in the backlight module according to the second embodiment of the present invention, the lamp panel 220 has the recess 250 at a portion thereof, and the light emitting source 230 is located in the corresponding recess 250.
Specifically, as can be seen from the above, the local thickness of the light panel 220 can be adjusted to make the local thickness of the light panel 220 different, so as to make the effective light mixing distances H of the plurality of light emitting sources 230 on the light panel 220 uniform. The effective light mixing distance H of the light emitting sources 230 on the light panel 220 can be uniform by locally providing the recess 250 on the light panel 220, i.e. reducing the thickness of the light panel 220. Wherein, a portion of the lamp panel 220 may be removed by an etching process to form a recess 250 at a portion of the lamp panel 220.
Fig. 6 is a schematic structural diagram of a backlight module according to a second embodiment of the invention. As shown in fig. 6, the backlight module includes: the back plate 210, the back plate 210 includes a bottom wall 211 and side walls 212, each side wall 212 and the bottom wall 211 enclose an optical cavity together, the cross-section shape of the bottom wall 211 includes an arc; a lamp panel 220 disposed on the bottom wall 211; a plurality of light emitting sources 230 disposed on the lamp panel 220; an optical film 240 positioned above the plurality of light emitting sources 230; the thicknesses of different parts of the light plate 220 are different, the distance between the light emitting sources 230 and the optical film 240 near the back plate 210 is the effective light mixing distance H, and the effective light mixing distances H of the light emitting sources 230 are identical. The lamp panel 220 has a recess 250 in a portion thereof, and the light emitting source 230 is disposed in the corresponding recess 250. In addition, the backlight module may further include an adhesive frame 260, where the adhesive frame 260 is adhered to the sidewall 212 of the back plate 210.
In addition, it should be noted that fig. 6 only shows the structure related to the embodiment of the present invention, and the backlight module according to the embodiment of the present invention may further include other components and/or structures for implementing the complete functions of the backlight module.
In the backlight module according to the second embodiment of the present invention, by adopting the backlight module according to the present invention, the local thickness of the lamp panel 220 is reduced, so that the local thickness of the lamp panel 220 is different, the effective light mixing distances H of the plurality of light emitting sources 230 on the lamp panel 220 are consistent, and it is better to ensure that each light emitting source 230 emits light at the same height, thereby facilitating the homogenization of the emitted light, improving the problem of uneven display of the panel without changing the existing architecture, and improving the requirements of the display panel for the picture taste.
The backlight module according to the embodiment of the invention further includes a light reflecting member 270, where the light reflecting member 270 includes a copper layer or a white glue layer of the lamp panel.
Specifically, the light reflecting component 270 may be a light panel copper layer or a white glue layer, where the light panel copper layer or the white glue layer has a light reflecting function, and the light emitted by the light emitting source 230 partially irradiates on the light panel 220, and is reflected by the light panel copper layer or the white glue layer, so as to increase brightness of a dark area, reduce brightness difference between the dark area and the bright area, facilitate homogenization of light emitting light, and improve uneven display of the panel on the basis of not changing the existing architecture. Wherein, the white glue layer can be formed by coating white oil or pasting white glue.
Wherein the light emitting source 230 comprises a Mini LED light emitting device.
Specifically, the light emitting source 230 may be a Mini LED light emitting device. By adopting the Mini LED light-emitting device, more dense chip arrangement can be adopted to reduce the light mixing distance, ultrathin light source components and multiple partitions are realized, meanwhile, small-size chip products are utilized, the product is comparable to the organic light-emitting diode products in the practical effect, and the material cost is more competitive than the organic light-emitting diode products. By employing Mini LED light emitting devices as the light emitting sources 230, the picture taste is improved without increasing the density of the light emitting sources 230 (such as beads).
In an embodiment of the present invention, as shown in fig. 6, the optical film 240 includes:
a lower diffusion plate 241 disposed above the light emitting source 230;
a quantum dot film layer 242 on the lower diffusion plate 241;
a light enhancement sheet 243 on the quantum dot film 242; the method comprises the steps of,
an upper diffusion plate 244 on the brightness enhancing sheet 243.
It should be understood that the various limitations of the backlight module according to the first embodiment of the present invention are also applicable to the backlight module according to the second embodiment of the present invention, so as to improve the uneven display of the panel and increase the requirements of the display panel.
Based on the backlight module described in the embodiments of the present invention, the present invention further provides a display device, where the display device includes the backlight module according to any one of the above embodiments, and a display panel adapted to the backlight module.
In the display device of the embodiment of the invention, by adopting the backlight module of any one of the above-mentioned, the lamp panels with different local thicknesses are adopted, so that the effective light mixing distances of a plurality of luminous light sources are consistent, and the luminous light sources can emit light rays at the same height, thereby being beneficial to providing the light rays for the display panel matched with the backlight module uniformly, improving the problem of uneven display of the panel on the basis of not changing the existing framework, and improving the requirements of the picture taste of the display panel. The display panel includes a display module (Open Cell) with a display function, and a cover plate (cover lens) disposed on the display module.
The display panel is a liquid crystal display panel.
In particular, the liquid crystal display panel (Liquid Crystal Display, LCD) is widely used in various electronic devices such as a mobile phone, a tablet computer, a digital camera, a computer, a notebook computer, and the like. A conventional liquid crystal display panel generally comprises an array substrate (TFT substrate), a color film substrate (CF substrate), and a liquid crystal layer disposed between the array substrate and the color film substrate. The color film substrate comprises an array substrate, a color film substrate and a common electrode, wherein the pixel electrode is arranged on one side of the array substrate, which is close to the color film substrate, and the common electrode is arranged on one side of the color film substrate, which is close to the array substrate. The working principle of the liquid crystal display panel is as follows: and applying voltage to the pixel electrode of the array substrate and the common electrode of the color film substrate, so as to control the deflection of liquid crystal molecules of the liquid crystal layer, and further refract light rays emitted from the backlight module to generate picture display. In a display device with a liquid crystal display panel, light emitted by a light emitting source in a backlight module is homogenized by an optical film and then provided for a liquid crystal layer in the liquid crystal display panel to realize picture display.
The array substrate has a Gate Line (Gate Line) extending in a horizontal direction, a data Line (Source Line) extending in a vertical direction, and a switching thin film transistor (Thin Film Transistor, TFT) having a Gate electrode connected to the Gate Line, a Source electrode connected to the data Line, and a drain electrode connected to the pixel electrode. The display device according to the embodiment of the invention can be widely used for various display panels, such as Twisted Nematic (TN) display panels, in-Plane Switching (IPS) display panels, vertical alignment (Vertical Alignment, VA) display panels, multi-quadrant vertical alignment (Multi-Domain Vertical Alignment, MVA) display panels, and the like.
In view of the foregoing, the present invention provides a backlight module and a display device having the same, the backlight module includes: the backboard comprises a bottom wall and side walls, each side wall and the bottom wall jointly enclose an optical cavity, and the cross section of the bottom wall comprises an arc shape; the lamp panel is arranged on the bottom wall; the light-emitting sources are arranged on the lamp panel; an optical film positioned above the plurality of light sources; the light source comprises a back plate, a light source, an optical film, a plurality of luminous light sources, a plurality of optical films, a plurality of light-emitting light sources, a plurality of light-emitting light source and a plurality of optical films, wherein the section of the light plate is provided with at least two parts with inconsistent thickness, the distance between the luminous light sources and one side of the optical film, which is close to the back plate, is the effective light-mixing distance. By adopting the lamp panels with different local thicknesses, the effective light mixing distances of the luminous light sources are consistent, and the luminous light sources can emit light rays at the same height, so that the homogenization of the emergent light rays is facilitated, the problem of uneven display of the panel is solved on the basis of not changing the existing framework, and the requirement of the picture taste of the display panel is improved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (7)
1. A backlight module, comprising:
the back plate comprises a bottom wall and side walls, each side wall and the bottom wall jointly enclose an optical cavity, and the cross section of the bottom wall comprises an arc shape;
the lamp panel is arranged on the bottom wall, and the section shape of the lamp panel comprises an arc shape;
the light-emitting sources are arranged on the lamp panel;
an optical film positioned above the plurality of light sources;
the light source comprises a back plate, a light source, a plurality of luminous light sources, an optical film, a light source and a light source, wherein the section of the light plate is provided with at least two parts with inconsistent thickness, the distance between the luminous light source and one side of the optical film, which is close to the back plate, is an effective light mixing distance, and the effective light mixing distances of the luminous light sources are consistent;
the lamp panel is characterized in that a part of the lamp panel is provided with a bulge, the luminous light sources are located on the corresponding bulges, the lamp panel further comprises a heightening layer, the bulges are formed on the lamp panel through the heightening layer, the heights of the heightening layer in the direction close to the optical film layer are different, and the distances from each position of each luminous light source to the optical film are equal.
2. The backlight module of claim 1, wherein the lamp panel comprises a dark area and a bright area, and the backlight module further comprises a light reflecting member, wherein the light reflecting member is positioned in the dark area.
3. The backlight module according to claim 2, wherein the light reflecting member comprises a lamp panel copper layer or a white glue layer.
4. The backlight module of claim 1, wherein the light-emitting light source comprises a Mini LED light-emitting device.
5. The backlight module of claim 1, wherein the optical film comprises:
a lower diffusion plate disposed above the light-emitting source;
a quantum dot film layer on the lower diffusion plate;
the light increasing sheet is positioned on the quantum dot film layer; the method comprises the steps of,
and an upper diffusion plate positioned on the light enhancement sheet.
6. A display device comprising a backlight module according to any one of claims 1 to 5 and a display panel adapted to the backlight module.
7. The display device of claim 6, wherein the display panel is a liquid crystal display panel.
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