CN107247366B - Backlight module and display device - Google Patents
Backlight module and display device Download PDFInfo
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- CN107247366B CN107247366B CN201710647596.8A CN201710647596A CN107247366B CN 107247366 B CN107247366 B CN 107247366B CN 201710647596 A CN201710647596 A CN 201710647596A CN 107247366 B CN107247366 B CN 107247366B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- G—PHYSICS
- G02—OPTICS
- 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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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- 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)
Abstract
The invention provides a backlight module and a display device comprising the backlight module, wherein the backlight module comprises a light guide plate and an LED lamp bar, and the LED lamp bar comprises a printed circuit board and a plurality of LEDs which are arranged on the printed circuit board and electrically connected with the printed circuit board; a plurality of LEDs include first LED, are located the printed circuit board both ends, first LED includes main light emitting area and a side light emitting area, main light emitting area is on a parallel with the income plain noodles of light guide plate, the side light emitting area orientation printed circuit board with the one end that the side light emitting area is neighbouring will first LED's partial light shines the corner of light guide plate, the effectual backlight unit corner dark space problem that leads to that contracts in having avoided LED lamp strip, simple structure to display device's display quality has been improved.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a backlight module and a display device including the backlight module.
Background
The display device in the existing market is mainly a backlight type liquid crystal display device, which includes a housing, a liquid crystal panel and a backlight module, wherein the liquid crystal panel is arranged in the housing, and the backlight module is one of the key components of the display device because the liquid crystal panel does not emit light and needs a light source provided by the backlight module to normally display images. The backlight module is divided into a side-in type backlight module and a direct type backlight module according to different light source placing positions. The edge of the backlight module behind the liquid crystal panel is provided with the LED lamp strip, and the side-in backlight module is relatively provided with the direct-type backlight module, so that the side-in backlight module is more favorable for narrowing the frame of the display device and meets the requirement of people on the lightness and thinness of the display device at present, and therefore, the side-in backlight module becomes a mainstream backlight module.
In the current lateral backlight module, because of the requirement of the narrow frame, two sides of the LED light bar usually need to be retracted into the display area, and therefore a certain dark area is left at the corner of the light guide plate. Especially, the existing display device such as a mobile phone is not limited to square and regular screen display, but pursues larger screen ratio and fresher appearance, so that the display panel is chamfered and cut, and the corresponding backlight module also needs to be chamfered, so that the two ends of the LED lamp strip are retracted, corner light rays can be reduced, and a dark area is formed. Although the method of moving the LED light bars to the display area and the left and right sides is adopted, the light rays at the corners can be increased, but the light mixing area of the backlight module is reduced, the processing difficulty of the light guide plate of the backlight factory is greatly increased, and the mass production is affected.
Disclosure of Invention
The invention aims to provide a backlight module and a display device comprising the backlight module, which can irradiate part of light rays of an LED lamp at the end part of an LED lamp strip to the corner of a light guide plate, and solve the problem of a dark corner of the backlight module.
The invention provides a backlight module, which comprises a light guide plate and an LED light bar, wherein the LED light bar comprises a printed circuit board and a plurality of LEDs which are arranged on the printed circuit board and electrically connected with the printed circuit board; the plurality of LEDs comprise first LEDs and are located at two ends of the printed circuit board, each first LED comprises a main light emitting surface and a side light emitting surface, the main light emitting surface is parallel to the light incoming surface of the light guide plate, and the side light emitting surfaces face towards one ends, adjacent to the side light emitting surfaces, of the printed circuit board and irradiate partial light rays of the first LEDs to corners of the light guide plate.
In an embodiment of the invention, the LEDs further include a second LED located in the middle of the printed circuit board, and a light emitting surface of the second LED is parallel to the light incident surface of the light guide plate.
In one embodiment of the present invention, the first LED is a twin parallel LED, including: the light reflecting cup comprises a main opening positioned at the upper side of the light reflecting cup and a side opening positioned at one end of the light reflecting cup, and is respectively used for forming a main light emitting surface and a side light emitting surface of the first LED; the first LED wafer is positioned in the die bonding area at one end, close to the side opening, of the reflection cup; and the second LED wafer is positioned in the die bonding area at one end of the reflection cup, which is far away from the side opening.
In an embodiment of the present invention, a partition wall is disposed in the reflective cup, the partition wall and the reflective cup are integrally formed of the same material, and the partition wall is located between the first LED chip and the second LED chip.
In one embodiment of the present invention, the reflector cup includes an inclined bottom surface located between the partition wall and the side opening, and a height of the inclined bottom surface on a side close to the side opening is smaller than a height of the inclined bottom surface on a side away from the side opening.
In an embodiment of the present invention, the backlight module further includes a rubber frame disposed around the light guide plate, and the LED light bar is located between the rubber frame and the light incident surface of the light guide plate; the corners of the rubber frame close to the two ends of the LED lamp strip are designed to be chamfered.
In an embodiment of the invention, corners of the light guide plate near two ends of the LED light bar are designed to be chamfered.
In an embodiment of the invention, the light guide plate includes a special-shaped light guide portion, and the special-shaped light guide portion is located between an end of the LED light bar and the plastic frame.
In one embodiment of the present invention, the rubber frame includes a first chamfer, and the light guide plate includes a second chamfer; the backlight module also comprises a reflecting layer which is arranged between the section of the second chamfer and the section adjacent to the first chamfer and is used for reflecting the light rays irradiated to the corners into the light guide plate.
In an embodiment of the present invention, the reflective layer is a reflective coating layer, and the reflective coating layer is formed on a tangent plane of the first chamfer or the second chamfer.
In addition, the invention also provides a display device which comprises a display panel and the backlight module.
In an embodiment of the invention, the display panel includes an irregular area, and the irregular area corresponds to a chamfering position of the plastic frame.
Compared with the prior art, the technical scheme provided by the invention has the following advantages: the invention provides a backlight module and a display device comprising the backlight module, wherein the backlight module comprises a light guide plate and an LED lamp bar, and the LED lamp bar comprises a printed circuit board and a plurality of LEDs which are arranged on and electrically connected with the printed circuit board; a plurality of LED lamps include first LED, are located the printed circuit board both ends, first LED includes main light emitting area and a side light emitting area, main light emitting area is on a parallel with the income plain noodles of light guide plate, the side light emitting area orientation printed circuit board with the adjacent one end of side light emitting area will the partial light of first LED lamp shines the corner of light guide plate, the effectual backlight unit corner dark space problem that contracts in having avoided LED lamp strip among the prior art and lead to, simple structure to display device's demonstration quality has been improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
fig. 1 is a schematic front view of a backlight module according to an embodiment of the invention;
FIG. 2 is a schematic view of a corner of the backlight module shown in FIG. 1;
FIG. 3 is a schematic view of a corner of the backlight module shown in FIG. 1;
FIG. 4 is a schematic view of another backlight module according to an embodiment of the present invention;
FIG. 5 is a schematic view of another backlight module according to an embodiment of the present invention;
FIG. 6 is a schematic view of another backlight module according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a first LED in the backlight module shown in FIG. 6;
FIG. 8 is a cross-sectional view of the first LED of FIG. 7 taken along the direction A-A';
FIG. 9 is a schematic view of a backlight module according to another embodiment of the present invention;
FIG. 10 is a schematic diagram of a first LED in the backlight module shown in FIG. 9;
fig. 11 is a schematic diagram of a display device according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
First, the present invention provides a backlight module, as shown in fig. 1, 2 and 3, fig. 1 is a schematic front view of a backlight module according to an embodiment of the present invention, fig. 2 is a schematic view of one corner of the backlight module shown in fig. 1, and fig. 3 is a schematic view of one corner of the backlight module shown in fig. 1, in this embodiment, the backlight module includes a rubber frame 03, a reflective film layer (not shown) disposed in the rubber frame 03, a light guide plate 02 and an optical film 04, and an LED light bar 01 disposed between one side of the rubber frame 03 and a light incident surface 21 of the light guide plate 02, and the light guide plate 02 is disposed between the reflective film layer and the optical film 04. The LED light bar 01 includes a printed circuit board (not shown) and a plurality of LEDs mounted on and electrically connected to the printed circuit board, in this embodiment, the plurality of LEDs include two first LEDs 11 respectively located at two ends of the printed circuit board, and each first LED includes a main light emitting surface 111 and a side light emitting surface 112, wherein the main light emitting surface 111 is parallel to the light incident surface 21 of the light guide plate 02, and irradiates light emitted from the main light emitting surface 111 into the light guide plate 02; the side light emitting surface 112 faces one end of the printed circuit board adjacent to the side light emitting surface 112, and irradiates part of the light of the first LED11 to a corner of the light guide plate 02 adjacent to the first LED11, so as to eliminate a corner dark area caused by retraction of two ends of the LED light bar.
Further, the LEDs further include a plurality of second LEDs 12 located in the middle of the printed circuit board, that is, between the first LEDs 11 located at the two ends, and light emitting surfaces of the second LEDs 12 are parallel to the light incident surface 21 of the light guide plate 02, and are configured to irradiate light rays emitted by the second LEDs into the light guide plate.
Further, in this embodiment, for the heterotypic design of cooperation display device or in order to increase the display area of display screen and account for the ratio, this backlight unit is close to the corner of LED lamp strip one side and is the chamfer design, and correspondingly, the corner of gluing the both ends that are close to LED lamp strip 01 of frame 03 is the chamfer design.
Further, in the present embodiment, corners of the light guide plate 02 near two ends of the LED light bar 01 are designed to be chamfered. Wherein, glue the frame and include first chamfer 31, be located two corners that are close to the both ends of LED lamp strip of gluing the frame respectively, the light guide plate includes second chamfer 22, be located two corners that are close to the both ends of LED lamp strip of light guide plate respectively, and the shape and the size of second chamfer 22 can be with the shape and the size phase-match of first chamfer 31 that is close to with it, in order to reduce the light guide plate and glue the gap between the frame, the light-emitting area of increase light guide plate, the display area proportion of increase display screen, promote the display effect.
Fig. 4 is a schematic view of another backlight module according to an embodiment of the present invention, in which the structure of the backlight module according to the embodiment is similar to that of the backlight module shown in fig. 1-3, the LED light bar includes first LEDs at two ends thereof, each of the first LEDs includes a main light-emitting surface parallel to the light-incident surface of the light guide plate and a side light-emitting surface, the side light-emitting surface is disposed toward an end of the LED light bar adjacent to the side light-emitting surface, and a portion of the light of the first LED is irradiated to a corner of the light guide plate adjacent to the first LED to eliminate a corner dark area of the backlight module. The difference lies in, light guide plate 02 still includes the dysmorphism light guide part 23 of two corners departments, dysmorphism light guide part 23 sets up with light guide plate 02 integrated into one piece, in the gap between the income plain noodles protrusion of light guide plate and the tip that stretches into LED lamp strip and glue frame 03, can be better with the leading-in to the light guide plate of the light that first LED's side light emitting area sent, increase the utilization ratio of the newly-increased side light emitting area emergent light of first LED at both ends about LED lamp strip, further improve the corner dark space problem.
Further, in this embodiment, the corners of the glue frame and the light guide plate near the two ends of the LED light bar are chamfered, and the special-shaped light guide portion is disposed between the chamfer of the light guide plate and the first LED.
Fig. 5 is a schematic diagram of another backlight module according to an embodiment of the present invention, in which the structure of the backlight module is similar to that of the backlight module shown in fig. 1-3, the LED light bar includes first LEDs at two ends thereof, each of the first LEDs includes a main light-emitting surface parallel to the light-incident surface of the light guide plate and a side light-emitting surface, the side light-emitting surface is disposed toward an end of the LED light bar adjacent to the side light-emitting surface, and a portion of the light of the first LED is irradiated to a corner of the light guide plate adjacent to the first LED to eliminate a corner dark area of the backlight module. And the corner of this backlight unit, be close to LED lamp strip one side is the chamfer design, and is corresponding, glues the corner that is close to the both ends of LED lamp strip of frame 03 and light guide plate 02 and designs for the chamfer to increase display screen's display area accounts for the ratio. The difference is that, in this embodiment, the backlight module further includes a reflective layer 05 disposed between the rubber frame 03 and the light guide plate 02, specifically, between the section of the second chamfer and the section of the first chamfer adjacent thereto, for reflecting the light irradiated thereto into the light guide plate, so as to increase the utilization rate of the light emitted from the newly added side light emitting surfaces of the first LEDs at the left and right ends of the LED light bar, and further improve the problem of corner dark areas.
In this embodiment, the reflective layer 05 is a reflective coating layer, a silver-coated lamp, or the like, which is coated on the second chamfered section formed on the light guide plate. Certainly, in other embodiments, the reflective coating may be formed on the section of the first chamfer on the rubber frame by coating, or the reflective coating 05 may be a reflective sheet attached to the section of the first chamfer or the second chamfer, and the reflective surface of the reflective sheet faces the light guide plate, so as to reflect the light irradiated to the section into the light guide plate, increase the utilization rate of the emergent light of the newly added side light emitting surfaces of the first LEDs at the left end and the right end of the LED light bar, and further improve the problem of the dark area in the corner.
Fig. 6 is a schematic view of another backlight module according to an embodiment of the present invention, fig. 7 is a schematic view of a structure of first LEDs in the backlight module shown in fig. 6, and fig. 8 is a cross-sectional view of the first LEDs shown in fig. 7 along a direction a-a', the structure of the backlight module provided in this embodiment is similar to that of the backlight module shown in fig. 1-3, in which an LED light bar includes first LEDs at two ends thereof, each of the first LEDs includes a main light emitting surface parallel to a light incident surface of a light guide plate and a side light emitting surface, wherein the side light emitting surface is disposed toward an end of the LED light bar adjacent to the side light emitting surface, and a portion of light of the first LEDs is irradiated to a corner of the light guide plate adjacent to the first LEDs to eliminate a corner dark area of the backlight module. The difference is that the first LED11 is a twin-crystal parallel LED, which includes a concave reflective cup 100, a first LED chip 103a, a second LED chip 103b, a first conductive pin 104a, and a second conductive pin 104 b.
Specifically, the reflective cup 100 is formed by injection molding of an insulating reflective resin, for example, and the inner wall of the reflective cup has a reflective effect, and the reflective cup 100 includes a main opening 101 located at the upper side of the reflective cup 100 and a side opening 102 located at one end of the reflective cup 100, which are respectively used for forming a main light emitting surface and a side light emitting surface of the first LED 11; a first LED chip 103a located at one end of the reflective cup 100 close to the side opening 102 and mounted in the die attach region on the bottom surface of the reflective cup 100; a second LED chip 103b located at one end of the reflective cup 100 far from the side opening 102 and mounted in the die attach region on the bottom surface of the reflective cup 100, wherein the first LED chip 103a is connected in parallel with the second LED chip 103 b; the first conductive pin 104a and the second conductive pin 104b are integrally formed with the reflective cup 100 by insert molding.
The first LED chip 103a and the second LED chip 103b are connected in parallel, most of the light emitted by the first LED chip 103a enters the corner position of the backlight module, most of the light emitted by the second LED chip 103b enters the non-corner position of the backlight module, so that the two LED chips of the first LED11 can be separately controlled, the voltage of the first LED chip 103a can be independently adjusted according to the size of the corner dark area of the backlight module, the brightness setting of the positions outside the corners of the backlight module can not be influenced while the light of the corner dark area is adjusted, and the corner position and the non-corner position of the display device can simultaneously reach a better brightness state.
Further, in this embodiment, a partition wall 105 may be further disposed in the reflective cup 100, and the partition wall 105 is located between the first LED chip 103a and the second LED chip 103b, so as to prevent mutual interference between light emitted from the first LED chip 103a and light emitted from the second LED chip 103b, and when the corner dark area is adjusted by adjusting the voltage of the first LED chip 103a, the display brightness at the non-corner position is not affected, and when the display brightness at the non-corner position is adjusted by adjusting the voltage of the second LED chip 103b, the corner position brightness is not affected. In the present embodiment, the partition walls 105 may be formed integrally with the reflective cup 100, for example, without adding additional manufacturing steps.
Fig. 9 is a schematic view of another backlight module according to an embodiment of the present invention, and fig. 10 is a schematic view of first LEDs in the backlight module shown in fig. 9, in which the structure of the backlight module provided in this embodiment is similar to that of the backlight module shown in fig. 6-8, an LED light bar of the backlight module includes first LEDs at two ends thereof, each first LED includes a main light emitting surface parallel to a light incident surface of a light guide plate and a side light emitting surface, wherein the side light emitting surface is disposed toward an end of the LED light bar adjacent to the side light emitting surface, and a part of light of the first LED is irradiated to a corner of the light guide plate adjacent to the first LED, and the first LED11 is a twin parallel LED to eliminate a corner dark area of the backlight module. The difference is that the reflector cup 100 of the twin crystal parallel LED further includes an inclined bottom surface 106 between the partition wall 105 and the side opening at one end, a height of the inclined bottom surface 106 on a side close to the side opening is smaller than a height of the inclined bottom surface 106 on a side away from the side opening, where the height is a height between an upper surface of the inclined bottom surface and a lower surface of the reflector cup, the first LED chip 103a is mounted on the upper surface of the inclined bottom surface, and the lower surface of the reflector cup is in contact with the printed circuit board when the first LED is mounted on the printed circuit board.
The first LED chip 103a is mounted on the die attach area on the inclined bottom 106, and has a substantially same inclination angle with the inclined bottom 106, under the combined action of the inclined bottom 106, the partition 105 and other reflective inner walls of the reflective cup, all light emitted from the first LED chip 103a can illuminate the corner of the light guide plate, so that the light utilization rate of the newly added side light emitting surfaces of the first LEDs at the left and right ends of the LED light bar can be increased while the corner dark area is improved, the brightness of the non-corner position of the light guide plate can not be affected by the light emitted from the first LED chip 103a, and the voltage of the first LED chip 103a can be freely adjusted according to the requirement of the corner dark area, so as to achieve the best status.
In addition, referring to fig. 11, fig. 11 is a schematic view of a display device according to an embodiment of the present invention, where the display device includes a display panel and a backlight module having a chamfered design according to an embodiment of the present invention, in this embodiment, the display panel includes an irregular area 200, and a chamfered position of the backlight module corresponds to the irregular area 200 and is matched with the irregular area 200 in shape, so that the display device has a larger screen area and a smaller bezel. It should be understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a mobile phone, a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The backlight module may adopt any one of the backlight modules with the chamfer design provided in the embodiments of the present invention, and the beneficial effects of the backlight module provided in the embodiments of the present invention can be obtained by referring to the specific description of the backlight module in the above embodiments, and the details of the embodiment are not repeated herein.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A backlight module comprises a light guide plate and an LED light bar,
the LED light bar comprises a printed circuit board and a plurality of LEDs which are arranged on the printed circuit board and electrically connected to the printed circuit board;
the LEDs comprise first LEDs which are positioned at two ends of the printed circuit board, each first LED comprises a main light-emitting surface and a side light-emitting surface, the main light-emitting surface is parallel to the light incident surface of the light guide plate, the side light-emitting surfaces face one end, adjacent to the side light-emitting surfaces, of the printed circuit board, and part of light rays of the first LEDs are irradiated to corners of the light guide plate;
the first LED is a twin parallel LED comprising:
the light reflecting cup comprises a main opening positioned at the upper side of the light reflecting cup and a side opening positioned at one end of the light reflecting cup, and is respectively used for forming a main light emitting surface and a side light emitting surface of the first LED;
the first LED wafer is positioned in the die bonding area at one end, close to the side opening, of the reflection cup;
and the second LED wafer is positioned in the die bonding area at one end of the reflection cup, which is far away from the side opening.
2. The backlight module of claim 1, wherein the plurality of LEDs further comprises a second LED positioned in the middle of the printed circuit board, and a light emitting surface of the second LED is parallel to the light incident surface of the light guide plate.
3. The backlight module as claimed in claim 1, wherein a spacer is disposed in the reflective cup, the spacer and the reflective cup are integrally formed, and the spacer is located between the first LED chip and the second LED chip.
4. The backlight module according to claim 3, wherein the reflector cup comprises an inclined bottom surface between the partition wall and the side opening, and a height of the inclined bottom surface near the side opening is smaller than a height of the inclined bottom surface away from the side opening.
5. The backlight module according to claim 4, further comprising a plastic frame disposed around the light guide plate, wherein the LED light bar is located between the plastic frame and the light incident surface of the light guide plate;
the corners of the rubber frame close to the two ends of the LED lamp strip are designed to be chamfered.
6. The backlight module as claimed in claim 5, wherein corners of the light guide plate near two ends of the LED light bars are chamfered.
7. The backlight module according to claim 6, wherein the light guide plate comprises a shaped light guide portion, and the shaped light guide portion is located between an end of the LED light bar and the plastic frame.
8. The backlight module according to claim 6 or 7, wherein the adhesive frame comprises a first chamfer and the light guide plate comprises a second chamfer;
the backlight module also comprises a reflecting layer which is arranged between the section of the second chamfer and the section adjacent to the first chamfer and is used for reflecting the light rays irradiated to the corners into the light guide plate.
9. The backlight module as claimed in claim 8, wherein the reflective layer is a reflective coating formed on a tangent plane of the first or second chamfer.
10. A display device comprising a display panel and the backlight module according to any one of claims 5-9.
11. The display device according to claim 10, wherein the display panel comprises an irregular area corresponding to a chamfered position of the bezel.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647596.8A CN107247366B (en) | 2017-08-01 | 2017-08-01 | Backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710647596.8A CN107247366B (en) | 2017-08-01 | 2017-08-01 | Backlight module and display device |
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| CN107247366A CN107247366A (en) | 2017-10-13 |
| CN107247366B true CN107247366B (en) | 2020-04-24 |
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|---|---|---|---|---|
| KR102421777B1 (en) * | 2017-10-19 | 2022-07-18 | 삼성전자주식회사 | Display apparatus |
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