CN110032003B - Light emitting diode, backlight module and display device - Google Patents
Light emitting diode, backlight module and display device Download PDFInfo
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- CN110032003B CN110032003B CN201910361914.3A CN201910361914A CN110032003B CN 110032003 B CN110032003 B CN 110032003B CN 201910361914 A CN201910361914 A CN 201910361914A CN 110032003 B CN110032003 B CN 110032003B
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- 230000003287 optical effect Effects 0.000 claims description 13
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- 239000012788 optical film Substances 0.000 claims description 6
- 239000002245 particle Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 23
- 238000002156 mixing Methods 0.000 abstract description 20
- 230000000149 penetrating effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
- 230000001795 light effect Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
-
- 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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
- Led Device Packages (AREA)
Abstract
The invention discloses a light emitting diode, a backlight module and a display device, comprising: the LED chip comprises a base, a side wall and a light-emitting chip; the base and the side wall form an accommodating cavity, and the light-emitting chip is arranged in the accommodating cavity; the thickness of the side wall of the light-emitting diode at one side close to the base is set to be larger than that at one side far away from the base, and some areas of the side wall are set to be light-transmitting areas, so that emergent light of the light-emitting chip can be deflected to one side of the base after penetrating through the light-transmitting areas, the light-emitting range of the light-emitting diode is expanded, and the light mixing effect is improved; in addition, the inner surface and/or the outer surface of the light transmission area are/is provided with the microstructures, and the light emitting angle of the light emitting diode can be adjusted by adjusting the shape and the setting angle of the microstructures.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light emitting diode, a backlight module and a display device.
Background
A Light Emitting Diode (LED) is one of semiconductor diodes, can convert electrical energy into Light energy, has many advantages such as energy saving, environmental protection, long service life, low power consumption, high brightness, and easy dimming, and is widely used in the fields of illumination, display, and backlight.
In the current stage of display devices, a backlight module is usually combined with a transmissive display panel, and a light source in the backlight module may be a light emitting diode. In order to improve the display brightness, the number of the light emitting diodes is increased in the backlight module, so that the distance between the light emitting diodes is reduced, the light mixing effect of the adjacent light emitting diodes is poor, the display effect is directly and finally influenced, and the user experience is reduced.
Disclosure of Invention
The invention provides a light emitting diode, a backlight module and a display device, which are used for improving the light mixing effect of the light emitting diode.
In a first aspect, the present invention provides a light emitting diode comprising: the LED chip comprises a base, a side wall and a light-emitting chip; the base and the side wall form an accommodating cavity, and the light-emitting chip is arranged in the accommodating cavity; wherein,
the thickness of one side of the side wall close to the base is larger than that of one side of the side wall far away from the base;
the side wall comprises a light transmitting area; in the direction that the light-emitting chip points to the side wall, the surface of the side wall, close to the light-emitting chip, corresponding to the light-transmitting area is an inner surface, the surface of the side wall, far away from the light-emitting chip, corresponding to the light-transmitting area is an outer surface, and the inner surface and/or the outer surface are/is provided with microstructures.
In a second aspect, the present invention provides a backlight module, including any one of the light emitting diodes, a housing and an optical film set;
the housing includes: the back plate and the side frame form an accommodating space, the plurality of light emitting diodes and the optical diaphragm group are positioned in the accommodating space, the back plate and the optical diaphragm group are oppositely arranged, and the optical diaphragm group comprises at least one layer of optical diaphragm.
In a third aspect, the present invention provides a display device, including any one of the above backlight modules and a display panel located at a light exit side of the backlight module.
The invention has the following beneficial effects:
the invention provides a light emitting diode, a backlight module and a display device, comprising: the LED chip comprises a base, a side wall and a light-emitting chip; the base and the side wall form an accommodating cavity, and the light-emitting chip is arranged in the accommodating cavity; the thickness of one side of the side wall close to the base is larger than that of one side of the side wall far away from the base; the side wall comprises a light-transmitting area; in the direction of the side wall of the light-emitting chip, the surface of the side wall, close to the side of the light-emitting chip, corresponding to the light-transmitting area is an inner surface, the surface of the side wall, far away from the side of the light-emitting chip, corresponding to the light-transmitting area is an outer surface, and the inner surface and/or the outer surface are/is provided with microstructures. The thickness of the side wall of the light-emitting diode on one side close to the base is set to be larger than that on one side far away from the base, and some areas of the side wall are set to be light-transmitting areas, so that the emergent light of the light-emitting chip can be deflected to one side of the base after penetrating through the light-transmitting areas, the light-emitting range of the light-emitting diode is expanded, and the light mixing effect of the light-emitting diode is improved; in addition, the inner surface and/or the outer surface of the light transmission area are/is provided with the microstructures, and the light emitting angle of the light emitting diode can be adjusted by adjusting the shape and the setting angle of the microstructures.
Drawings
Fig. 1 is a schematic structural diagram of a light emitting diode in the prior art;
FIG. 2 is a diagram of the light mixing effect of a light emitting diode in the prior art;
fig. 3 is a schematic side view of a light emitting diode according to an embodiment of the invention;
fig. 4 is a second schematic side view of a light emitting diode according to an embodiment of the present invention;
fig. 5 is a third schematic side view of an led according to a third embodiment of the present invention;
fig. 6 is a schematic view illustrating a dimming principle of a light-transmitting region according to an embodiment of the present invention;
fig. 7 is a schematic view illustrating a dimming principle of a microstructure according to an embodiment of the present invention;
fig. 8 is a second schematic view illustrating a light-adjusting principle of the microstructure according to the embodiment of the invention;
FIG. 9 is a schematic structural diagram of a bump structure according to an embodiment of the present invention;
FIG. 10 is a second schematic structural diagram of a bump structure according to an embodiment of the present invention;
fig. 11 is a third schematic structural view of a bump structure according to an embodiment of the present invention;
FIG. 12 is a schematic view of a microstructure distribution according to an embodiment of the present invention;
FIG. 13 is a second schematic view of a microstructure distribution according to an embodiment of the present invention;
fig. 14 is a fourth schematic side view of a light emitting diode according to an embodiment of the present invention;
fig. 15 is a schematic view illustrating a light emitting range of a light emitting diode according to an embodiment of the invention;
fig. 16 is a diagram illustrating a light mixing effect of a light emitting diode according to an embodiment of the present invention;
fig. 17 is a fifth schematic side view of a light emitting diode according to an embodiment of the invention;
fig. 18 is a schematic top view illustrating an led according to an embodiment of the present invention;
fig. 19 is a second schematic top view illustrating an led according to an embodiment of the present invention;
fig. 20 is a third schematic view illustrating a top view structure of a light emitting diode according to an embodiment of the invention;
FIG. 21 is a schematic side view illustrating a backlight module according to an embodiment of the present invention;
fig. 22 is a second schematic side view illustrating a backlight module according to an embodiment of the invention;
FIG. 23 is a schematic top view illustrating the backlight module shown in FIG. 22;
fig. 24 is a third schematic side view illustrating a backlight module according to an embodiment of the invention;
FIG. 25 is a fourth schematic diagram of a side view of a backlight module according to an embodiment of the present invention;
FIG. 26 is a schematic top view illustrating the backlight module shown in FIG. 21;
FIG. 27 is a fifth schematic diagram of a side view of a backlight module according to an embodiment of the present invention;
FIG. 28 is a sixth schematic diagram of a side view of a backlight module according to an embodiment of the present invention;
FIG. 29 is a schematic side view of a display device according to an embodiment of the present invention;
fig. 30 is a top view of a display device according to an embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus, a repetitive description thereof will be omitted. The words indicating positions and directions in the present invention are illustrated by way of example in the accompanying drawings, but may be changed as required and are within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.
It should be noted that in the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
As shown in fig. 1, the sidewall J formed during the led package is usually made of an opaque material, so that the light-emitting range of the led is within the range of x. When the leds are closely arranged, as shown in fig. 2, an obvious dark area is generated in the BB area in the light emitting range of the adjacent leds, and when the leds are applied to the backlight module, the problem of uneven light emission is caused, which seriously affects the display effect.
In view of this, embodiments of the present invention provide a light emitting diode, a backlight module and a display device, which are used to solve the problem of light mixing of the light emitting diode, and when the light emitting diode is applied to the backlight module, the light emitted from the backlight module is more uniform, which is beneficial to improving the final display effect.
The embodiments of the present invention are provided below with reference to the accompanying drawings. The thicknesses and shapes of the respective components in the drawings do not reflect the true scale of the display device, and are merely intended to schematically illustrate the present invention.
In a first aspect of the embodiments of the present invention, there is provided a light emitting diode, as shown in fig. 3, the light emitting diode provided in the embodiments of the present invention includes: a base 11, a side wall 12, and a light emitting chip 13; the base 11 and the side wall 12 form an accommodating cavity, and the light-emitting chip 13 is arranged in the accommodating cavity; as shown in fig. 3, the thickness of the sidewall 12 on the side close to the base 11 (i.e., the bottom thickness of the sidewall 12 in fig. 3) is greater than the thickness of the sidewall 12 on the side away from the base 11 (i.e., the top thickness of the sidewall 12 in fig. 3).
In the light emitting diode provided by the embodiment of the present invention, the sidewall 12 includes a light transmissive region 121; in the direction in which the light emitting chip 13 points to the side wall 12, the surface of the side wall corresponding to the light transmitting region 121, which is close to the side of the light emitting chip 13, is an inner surface I, the surface of the side wall corresponding to the light transmitting region 121, which is far from the side of the light emitting chip 13, is an outer surface O, and the inner surface I and/or the outer surface O are/is provided with microstructures 122. As shown in fig. 3, a microstructure 122 may be provided on an outer surface O of the light-transmitting region 121 of the light emitting diode; alternatively, as shown in fig. 4, a microstructure 122 may be disposed on an inner surface I of the light-transmitting region 121 of the led; alternatively, as shown in fig. 5, the microstructures 122 may be disposed on both the inner surface I and the outer surface O of the light-transmitting region 121 of the led.
Since the sidewall of the light emitting diode provided by the embodiment of the present invention has the light transmitting region, the large-angle light emitted from the light emitting chip 13 can be emitted outward from the light transmitting region 121, so that the emitted light at the bottom position of the light emitting diode can be compensated to a certain extent, and the light emitting range of the light emitting diode can be expanded.
Further, the sidewalls of the light emitting diode are configured to have a bottom thickness greater than a top thickness, so that the sidewalls form an inclined surface, as shown in fig. 6, when the emergent light of the light emitting chip 13 enters the light transmitting region 121, a part of the light transmitting region 121 performs a prism-like function, and can perform a certain deflection function on the incident light. Referring to fig. 6 in particular, the incident ray a is refracted into the light-transmitting area 121 after being incident on the sidewall of the light-transmitting area 121, forming a refracted ray b; the refracted ray b enters the outer wall of the light-transmitting area 121 again, and is refracted to form an emergent ray c; and light c is bigger for light a, to the deflection angle of bottom, so, through setting at least partial lateral wall with emitting diode to the light transmission region, just can make the light that incides light transmission region 121 to the bottom deflection outgoing of two luminous tubes, can supply emitting diode wide-angle's emergent light, when making a plurality of emitting diode adjacent row, can have better mixed light effect.
In the light emitting diode provided by the embodiment of the present invention, the microstructures 122 are further disposed on the inner surface I and/or the outer surface O of the sidewall. The material used for the microstructure 122 may be the same as the material of the light-transmitting region 122, and the microstructure on the surface thereof may be formed by injection molding while forming the light-transmitting region 121. The microstructures 122 on the surface of the light-transmitting region 121 may be convex structures, and the light exit angle can be adjusted by adjusting the inclination angle of the surface of the convex structures, as shown in fig. 7 to 8. The inclined surface of the microstructure 122 in fig. 7 is steeper than that of the microstructure in fig. 8, and when a light ray a1 is refracted after being incident on the inner wall of the light-transmitting region to form a refracted light ray b1, and a refracted light ray b1 is incident on the outer wall having the microstructure, the light ray b1 is incident on the inclined surface of the microstructure 122, and due to the existence of the inclined surface, the incident angle of the light ray b1 on the interface is changed, and the refracted light ray is further deflected to the bottom to form an emergent light ray c 1. When the inclination of the microstructure 122 on the surface of the light-transmitting region is reduced, as shown in fig. 8, a light ray a2 incident on the inner wall of the light-transmitting region at the same angle is refracted by the inner wall to form a refracted light ray b2, the incident angle of the refracted light ray b2 incident on the inclined surface of the microstructure 122 is larger, and the emergent light ray c2 is more deviated to the bottom of the light-transmitting region. Therefore, the final emergent angle of the light after the light enters the light-transmitting area can be adjusted by setting the angle of the inclined surface of the microstructure 122, and theoretically, the adjustment of the light within the range of 0-180 degrees can be realized.
In a specific implementation, the inclination angles of the microstructures 122 on the inner surface I and/or the outer surface O of the sidewall corresponding to the light-transmitting region may be uniform or non-uniform, the microstructures 122 with different inclination angles may be alternately disposed, or the microstructures 122 with the same inclination angle may be disposed in an aggregation manner, which is not limited herein.
As described above, the microstructures 122 disposed on the surface of the light-transmitting region may be protruding structures, and in practical applications, as shown in fig. 9, the protruding structures may be conical structures; alternatively, as shown in fig. 10, the convex structures may be provided as pyramid-shaped structures; it is also possible to have both conical and pyramidal structures on the surface of the light-transmitting region. As shown in fig. 11, in order to reduce the difficulty of manufacturing the protrusion structure, the top end of the conical structure may be rounded. In addition, the convex structure can be set as a symmetrical structure or an asymmetrical structure, and the setting of the specific shape can be flexibly adjusted according to the required light emergent angle, which is not limited herein.
As the embodiments provided above, the microstructures are arranged into the protruding structures, which can further increase the angle of the emergent light, and the protruding structures can be cone structures or pyramid structures, or other protruding shapes, so that the design of the protruding structures becomes more flexible, and the design space is increased.
In specific implementation, as shown in fig. 12, the inner surface I and/or the outer surface O of the light-transmitting region of the light-emitting diode include different densities of the protruding structures (122) in different regions. The arrangement density of the convex structures can be set according to the distribution requirement of emergent light, and the convex structures can be arranged more densely at the position which needs to be covered by the light in general. For example, in the embodiment of the invention, the light needs to be deflected to the bottom of the light emitting diodes to improve the light mixing effect between the light emitting diodes. Then, as shown in fig. 13, the inner surface I and/or the outer surface O of the light-transmitting region 121 includes a density of the convex structures (122) in a region close to the base 11 that is greater than a density of the convex structures in a region far from the base 11. Therefore, the light can be deflected to the bottom of the light-emitting diode more, the light distribution of the bottom area of the light-emitting diode is compensated, and the light mixing effect among the light-emitting diodes is improved.
As shown in fig. 14, when the symmetrical positions of the sidewalls 12 of the leds (i.e., the left and right sides in fig. 14) are set as the light-transmitting regions 121, the light-emitting range of the leds can be increased to the y region shown in fig. 15 through the above-mentioned setting, compared to the leds in the prior art shown in fig. 1, the y region has a wider light-covering range than the x region, and there is also light emitted from the bottom of the leds, so when the leds are closely arranged, as shown in fig. 16, the BB region originally generating a dark region is also covered by the light, thereby improving the light mixing effect among the leds, and making the light bottom of the light-emitting surface as a whole more uniform.
To further homogenize the light, scattering particles 123 may also be dispersed in the light-transmitting regions 121 of the sidewalls, as shown in fig. 17. The scattering particles 123 scatter the incident light to reflect the light in all directions, thereby achieving the purpose of light homogenization. In the manufacturing process, scattering particles may be mixed in the liquid transparent material, and the structure of the light-transmitting region 121 may be formed through an injection molding process.
Fig. 18 to 20 show a top view structure of the light emitting diode according to an embodiment of the present invention, in which an orthogonal projection of the sidewall 12 of the light emitting diode on the plane of the base 11 is annular. When the application scenes are different, the light emitting diodes with proper structures can be selected. For example, as shown in fig. 18, the light emitting diode has a circular side wall orthogonal to the plane of the base 11, and is more suitable for use in the field of illumination, direct-type backlight, and the like. When the sidewalls are made of a transparent material, all the sidewalls belong to the transparent region 121, so that the led can be expanded in all-directional light-emitting angles. In another practical manner, as shown in fig. 19, an orthographic projection of the side wall 12 of the light emitting diode on the plane of the base 11 is a rectangular ring shape, and includes four side plates connected to each other, wherein two side plates are disposed opposite to each other, and at least two side plates disposed opposite to each other form the light-transmitting area 121 using a light-transmitting material. Set the relative lateral wall in position to light transmission area 121, can realize enlarging the light-emitting angle of light in the direction in relative light transmission area, if when arranging emitting diode for a row of lamp strip, with adjacent each emitting diode's light transmission area relative setting, can show the mixed light effect that promotes between the emitting diode. When all the regions of the sidewalls are made of light-transmitting material, as shown in fig. 20, all the regions of the sidewalls are light-transmitting regions 121. When the side wall is made of the full-transparent material, the enlarged light-emitting angle of the horizontal dimension and the vertical dimension can be realized, so that the effect of optimizing light mixing can be achieved no matter what arrangement mode is adopted by the light-emitting diode, and the brightness uniformity of the light-emitting meter of the light-emitting diode is improved.
In a second aspect of the embodiment of the present invention, there is provided a backlight module, as shown in fig. 21, the backlight module provided in the embodiment of the present invention includes: the light emitting diode 100, the housing 200 and the optical film set 300 of any of the above structures.
Wherein, the housing 200 includes: the back plate 21 and the side frame 22 form an accommodating space, the plurality of light emitting diodes 100 and the optical diaphragm group 300 are located in the accommodating space, the back plate 21 and the optical diaphragm group 300 are oppositely arranged, and the optical diaphragm group 300 includes at least one layer of optical diaphragm.
The thickness of the side wall of each light-emitting diode adopted by the backlight module provided by the embodiment of the invention at one side close to the base is set to be larger than that at one side far away from the base, and partial area of the side wall is set to be a light-transmitting area, so that the emergent light of the light-emitting chip can be deflected to one side of the base after penetrating through the light-transmitting area, the light-emitting range of the light-emitting diode is expanded, and the light mixing effect of the light-emitting diode is improved; in addition, the inner surface and/or the outer surface of the light transmission area are/is provided with the microstructures, and the light-emitting angle of the light-emitting diode can be adjusted by adjusting the shape and the setting angle of the microstructures.
In specific implementation, the arrangement structure of the backlight module can be selected according to the actual application requirements. In an implementation manner, as shown in the schematic side view structure of the backlight module shown in fig. 22, the light emitting diodes 100 are arranged in a row to form a light bar, and fig. 23 is the schematic top view structure of fig. 22, and an extending direction of the light bar is parallel to a side edge of the light guide plate. As shown in fig. 22 to 23, the optical film includes: the light guide plate 31, the light exit surface of lamp strip intersects with the light exit surface of light guide plate. As shown in fig. 22, the light-emitting surface of the light bar is identical to the light-emitting surface of the light-emitting diode 100, and the light-emitting surface is opposite to the light-entering surface of the light guide plate 31 (in fig. 22, the light-entering surface of the light guide plate is the left side surface), and after the light emitted from the light-emitting diode enters the light guide plate, the light is homogenized by the light guide plate and finally exits to the outside at the light-emitting surface of the light guide plate (i.e., the upper surface of the light guide plate shown in fig. 23).
Because the distance between the light bar and the display area is gradually compressed due to the requirement of the narrow frame of the display device at the present stage, the light mixing distance of the light emitting diode reaching the display area is continuously reduced, the manufacturing process of the light emitting diode is limited, and the gap between the light emitting diodes cannot be infinitely reduced, so that the light which is not completely mixed cannot be completely homogenized by the light guide plate, and the edge position of the display area appears an obvious bright and dark area in front of the light bar, thereby causing the problem of firefly.
In the backlight module provided in the embodiment of the present invention, the sidewalls of the leds may be configured as the structure shown in fig. 19, and include four interconnected side plates, where two side plates are disposed opposite to each other; the two side plates disposed opposite to each other in the arrangement direction of the light emitting diodes are made of a light transmissive material to form a light transmissive region 121. Then, in the extending direction of the light bar, the light-emitting angle of each light-emitting diode is enlarged, more light rays are emitted to the bottom of the light-emitting diode, the light mixing effect between adjacent light-emitting diodes is improved, and the light mixing effect can be seen in fig. 16. After the light mixing effect of the light emitting diode is improved, the problem of an obvious area appearing at the edge of a display area can be reduced, and therefore the firefly phenomenon is avoided.
In order to improve the utilization effect of the light, as shown in fig. 24, the backlight module according to the embodiment of the invention may further include: the reflector 400 is located on the side of the led 100 away from the light incident surface of the light guide plate 31; alternatively, as shown in fig. 25, a reflective coating 400' may be disposed on a surface of the side frame 22 of the backlight module facing the led 100. After the light-emitting range of the light-emitting diode is enlarged, some light rays are emitted to the bottom of the light-emitting diode, the light rays can be incident to the reflector plate 400 or the reflective coating 400 'besides the light mixing effect among the light-emitting diodes is improved, and can be incident to the light-in surface of the light guide plate 31 again after being reflected by the reflective coating 400' of the reflector plate 400, so that more light rays are utilized by the light guide plate, and the utilization efficiency of the light is improved.
In another implementation manner, as shown in the schematic side view structure of the backlight module in fig. 21, the light emitting diodes 100 in the backlight module are distributed in an array to form a light source module, and a top view structure thereof is shown in fig. 26, where the light emitting surface of the light source module is parallel to the light emitting surface of the optical film set 300. The backlight module with the structure is a direct type backlight module, the light emitting angle of the light emitting diodes is limited, and after adjacent light emitting diodes are mixed, bright and dark areas can appear, so that the mixed light effect is poor, and the problem of uneven brightness is caused. When the light emitting diode provided by the embodiment of the invention is adopted, the side wall of the light emitting diode can be made of a light transmitting material, and the light emitting angle of the light emitting diode is increased through the structural arrangement of the light emitting diode provided by the embodiment of the invention, so that the light emitting diode has a better light mixing effect under the condition of smaller space, and the problem of uneven brightness is solved.
Similarly, in order to improve the utilization effect of the light, as shown in fig. 27, the backlight module according to the embodiment of the invention may further include: a reflective sheet 400 positioned between the light emitting diodes 100 and the back plate 21; alternatively, as shown in fig. 28, a reflective coating 400' may be disposed on a surface of the back plate 21 of the backlight module facing the led 100. Because some light rays are emitted to the bottom of the light emitting diode after the light emitting range of the light emitting diode is enlarged, the light rays can be incident to the reflector plate 400 or the reflective coating 400 'besides improving the light mixing effect among the light emitting diodes, and can be incident to the light incident surface of the light guide plate 31 again after being reflected by the reflective coating 400' of the reflector plate 400, so that more light rays are utilized by the light guide plate, and the utilization efficiency of the light is improved.
In a third aspect of the embodiments of the present invention, there is provided a display device, as shown in fig. 29, the display device provided in the embodiments of the present invention, including: any one of the backlight module and the display panel P positioned at the light-emitting side of the backlight module. The display device may be a display device such as a liquid crystal panel, a liquid crystal display, a liquid crystal television, or a mobile terminal device such as a mobile phone, a tablet computer, and an electronic album shown in fig. 30, which is not limited herein. Because the principle of the display device for solving the problems is similar to that of the backlight module, the implementation of the display device can be referred to that of the backlight module, and repeated details are not repeated.
The embodiment of the invention provides a light emitting diode, a backlight module and a display device, which comprise: the LED chip comprises a base, a side wall and a light-emitting chip; the base and the side wall form an accommodating cavity, and the light-emitting chip is arranged in the accommodating cavity; the thickness of one side of the side wall close to the base is larger than that of one side of the side wall far away from the base; the side wall comprises a light-transmitting area; in the direction of the side wall of the light-emitting chip, the surface of the side wall, close to the side of the light-emitting chip, corresponding to the light-transmitting area is an inner surface, the surface of the side wall, far away from the side of the light-emitting chip, corresponding to the light-transmitting area is an outer surface, and the inner surface and/or the outer surface are/is provided with microstructures. The thickness of the side wall of the light-emitting diode at one side close to the base is set to be larger than that at one side far away from the base, and some areas of the side wall are set to be light-transmitting areas, so that emergent light of the light-emitting chip can be deflected to one side of the base after penetrating through the light-transmitting areas, the light-emitting range of the light-emitting diode is expanded, and the light mixing effect of the light-emitting diode is improved; in addition, the inner surface and/or the outer surface of the light transmission area are/is provided with the microstructures, and the light emitting angle of the light emitting diode can be adjusted by adjusting the shape and the setting angle of the microstructures.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (12)
1. A light emitting diode, comprising: the LED chip comprises a base, a side wall and a light-emitting chip; the base and the side wall form an accommodating cavity, and the light-emitting chip is arranged in the accommodating cavity; wherein,
the thickness of one side of the side wall close to the base is larger than that of one side of the side wall far away from the base;
the side wall comprises a light transmitting area; scattering particles are dispersed in the light transmission area of the side wall;
in the direction of the light emitting chip pointing to the side wall, the surface of the side wall, close to the light emitting chip, corresponding to the light transmitting area is an inner surface, the surface of the side wall, far away from the light emitting chip, corresponding to the light transmitting area is an outer surface, and the inner surface and/or the outer surface are/is provided with a microstructure;
the microstructure is a convex structure; the inner surface and/or the outer surface comprises a greater density of the raised structures in a region proximate to the base than in a region distal to the base.
2. The led of claim 1, wherein the raised structures are conical structures or pyramidal structures.
3. The led of claim 1, wherein the sidewall has an annular shape in an orthographic projection of the sidewall in a plane of the base.
4. The led of claim 3, wherein said sidewalls comprise four interconnected side panels, wherein two of said side panels are disposed opposite each other, and at least two of said side panels disposed opposite each other are formed with a light transmissive material to form said light transmissive region.
5. The led of claim 1, wherein all regions of said sidewalls are made of a light transmissive material, and all regions of said sidewalls are said light transmissive regions.
6. A backlight module comprising a plurality of the light emitting diodes according to any one of claims 1 to 5, a housing and an optical film set;
the housing includes: the backlight module comprises a back plate and a side frame, wherein the back plate and the side frame form an accommodating space, a plurality of light emitting diodes and optical diaphragm groups are positioned in the accommodating space, the back plate and the optical diaphragm groups are oppositely arranged, and the optical diaphragm groups comprise at least one layer of optical diaphragm.
7. The backlight module of claim 6, wherein each of the LEDs is arranged in a row to form a light bar;
the optical film includes: and the light emitting surface of the lamp strip is intersected with the light emitting surface of the light guide plate.
8. The backlight module of claim 7, wherein the backlight module further comprises: the reflecting sheet is positioned on one side of the light emitting diode, which is far away from the light incident surface of the light guide plate; or,
and a reflective coating is arranged on the surface of one side of the side frame, which faces the light-emitting diode.
9. The backlight module according to claim 8, wherein the sidewalls of the leds comprise four side plates connected to each other, wherein two of the side plates are disposed opposite to each other;
and the two side plates which are oppositely arranged along the arrangement direction of the light emitting diodes are made of light-transmitting materials to form the light-transmitting area.
10. The backlight module as claimed in claim 6, wherein each of the light emitting diodes is arranged in an array to form a light source module;
the light-emitting surface of the light source component is parallel to the light-emitting surface of the optical diaphragm group.
11. The backlight module of claim 10, wherein the backlight module further comprises: the reflector plate is positioned between the light emitting diode and the back plate; or,
and a reflective coating is arranged on the surface of one side of the back plate facing the light-emitting diode.
12. A display device comprising the backlight module according to any one of claims 6 to 11 and a display panel located at the light exit side of the backlight module.
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| CN201910361914.3A CN110032003B (en) | 2019-04-30 | 2019-04-30 | Light emitting diode, backlight module and display device |
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| CN201910361914.3A CN110032003B (en) | 2019-04-30 | 2019-04-30 | Light emitting diode, backlight module and display device |
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| CN110032003B true CN110032003B (en) | 2022-08-19 |
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