CN109188773B - Backlight module, display device and control method of backlight module - Google Patents
Backlight module, display device and control method of backlight module Download PDFInfo
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- CN109188773B CN109188773B CN201811276071.9A CN201811276071A CN109188773B CN 109188773 B CN109188773 B CN 109188773B CN 201811276071 A CN201811276071 A CN 201811276071A CN 109188773 B CN109188773 B CN 109188773B
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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
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0083—Details of electrical connections of light sources to drivers, circuit boards, or the like
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
-
- 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
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- 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
- G02F1/133612—Electrical details
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention provides a backlight module, a display device and a control method of the backlight module, wherein the backlight module comprises: a light guide plate; and a light source component arranged at the light incident side of the light guide plate; the light source part includes: the lamp panel comprises a mounting surface which faces the light incident side of the light guide plate; the LED lamp comprises a light guide plate, a plurality of LED lamps and a plurality of LED lamps, wherein the light emitting surface of each LED lamp is arranged towards the light incident side of the light guide plate, each LED lamp can perform steering motion on the lamp plate, the steering angle of the LED lamps is changed, and the relative angle between the light emitting surface and the light incident side of the light guide plate is changed; and the control structure is used for controlling the LED lamp to perform steering motion. The backlight module can enlarge the light emitting angle of the point light source, so that the light provided by the backlight module is more uniform, the light mixing height is reduced, and the thinner or narrow-frame design of a product is facilitated.
Description
Technical Field
The invention relates to the technical field of display, in particular to a backlight module, a display device and a control method of the backlight module.
Background
In a liquid crystal display module, a backlight module is a key component related to the display effect. The backlight module mainly comprises a side-in type backlight module and a direct type backlight module. In the prior art, an LED lamp is generally used as a light source in a backlight module, and the LED lamp is a point light source, which is limited by the light emitting angle of the LED lamp, and if the image quality with uniform height is desired, the light mixing height of the LED lamp needs to be increased, so that for a side-in backlight source, the frame width of the display module is sacrificed, which is not beneficial to the narrow frame design of the product; for the direct type backlight source, the thickness of the display module can be increased, so that the visual effect of the whole machine is heavier, and the thin design of the product is not facilitated.
Disclosure of Invention
The invention aims to provide a backlight module, a display device and a control method of the backlight module, which can enlarge the light emitting angle of a point light source, enable the light provided by the backlight module to be more uniform, reduce the light mixing height and be more beneficial to thinner or narrow-frame design of products.
The technical scheme provided by the invention is as follows:
a backlight module includes: a light guide plate; and a light source component arranged at the light incident side of the light guide plate; the light source part includes:
the lamp panel comprises a mounting surface which faces the light incident side of the light guide plate;
the LED lamp comprises a light guide plate, a plurality of LED lamps and a plurality of LED lamps, wherein the light emitting surface of each LED lamp is arranged towards the light incident side of the light guide plate, each LED lamp can perform steering motion on the lamp plate, the steering angle of the LED lamps is changed, and the relative angle between the light emitting surface and the light incident side of the light guide plate is changed;
and the control structure is used for controlling the LED lamp to perform steering motion.
Further, the LED lamp includes:
the LED lamp body comprises a back surface arranged opposite to the light-emitting surface;
the spherical universal rotating body is arranged on the back surface of the LED lamp body;
be equipped with the recess on the installation face of lamp plate, the internal surface of recess be with the spherical curved surface of the surface matching of universal rotor, universal rotor embedding in the recess, and can the recess internal rotation, in order to drive the LED lamp body turns to.
Furthermore, a first electrode and a second electrode are arranged on the LED lamp body;
the inner surface of the groove is provided with a first electrode contact area and a second electrode contact area which are insulated from each other;
at least one part of the universal rotating body is an insulation area;
the first electrode penetrates through the insulating region and is in contact connection with the first electrode contact region;
the second electrode penetrates through the insulating region and is in contact connection with the second electrode contact region,
wherein the first electrode and the second electrode are arranged in the insulating region in an insulated manner.
Further, the first electrode and the second electrode penetrate through the inner part of the universal rotating body; alternatively, the first electrode and the second electrode are disposed on an outer surface of the universal rotating body.
Furthermore, the universal rotating body is of a magnet structure and is provided with at least one pair of magnetic poles, each pair of magnetic poles comprises a first magnetic pole and a second magnetic pole with opposite polarities, and the first magnetic pole and the second magnetic pole are respectively arranged on two sides of the universal rotating body;
control structure includes at least one magnetic field and produces the unit, magnetic field produce the unit set up in on the lamp plate, and can produce magnetic field around universal rotor, and produced magnetic field with predetermined frequency transform magnetic field direction, attract or repel alternately universal rotor, so that universal rotor carries out steering motion.
Further, the magnetic field generating unit includes:
the first coil is arranged on the lamp panel and positioned on one side of the first magnetic pole, an input current signal on the first coil changes, and a magnetic acting force generated between the first coil and the first magnetic pole changes to attract or repel the universal rotating body;
the second coil is arranged on the lamp panel and positioned on one side of the second magnetic pole, an input current signal on the second coil changes, and a magnetic acting force generated between the second coil and the second magnetic pole changes to attract or repel the universal rotating body;
and a current control part for inputting a current signal varying at a predetermined frequency to the first coil and the second coil, and connected to the first coil and the second coil.
Further, universal rotor has two at least pairs of magnetic poles, just two at least pairs of magnetic poles are in follow on the universal rotor the circumference of a predetermined circular cross section of universal rotor carries out circumference and distributes, and first magnetic pole and second magnetic pole are located respectively in every pair of magnetic pole the relative both sides of universal rotor, wherein predetermined circular cross section does the light emitting area of LED lamp with when relative angle between the light guide plate is reference angle, universal rotor with the parallel circular cross section of the income light side of light guide plate.
Furthermore, the backlight module is a straight-in type backlight module, the light incident side of the light guide plate is arranged opposite to the light emergent side of the light guide plate, and the plurality of LED lamp arrays are distributed on the mounting surface of the lamp panel;
or, the backlight module is a side-in type backlight module, the light incident side of the light guide plate is adjacently arranged with the light emergent side of the light guide plate, and the plurality of LED lamps are arranged on the mounting surface of the lamp panel at intervals along the extension direction of the transition edge between the light incident side and the light emergent side.
A display device comprises the backlight module.
A control method of a backlight module is applied to the backlight module, and the method comprises the following steps:
and controlling each LED lamp to perform steering motion on the lamp panel.
Further, control each the LED lamp is in turn to the motion on the lamp plate, specifically include:
current signals varying at a predetermined frequency are input to the first coil and the second coil to alternately attract or repel the first magnetic pole and the second magnetic pole to cause the universal rotating body to perform a rotational motion.
The beneficial effects brought by the invention are as follows:
in the above scheme, the light source part that sets up in backlight unit, each LED lamp can turn to the motion on the lamp plate, and the LED lamp is turning to the motion, when turning to the angle change, the relative angle between the light emitting area of LED lamp and the income light side of light guide plate changes, therefore, the light that the LED lamp was emergent can be at different regions of the income light side of light guide plate of incidence when turning to the angle, compare with the specific area that the light of LED lamp emergent among the prior art can only fix the income light side of light guide plate, the LED lamp turns to the motion and can enlarge the luminous angle of LED lamp, thereby can reach and reduce the mixed light height, reach the even purpose of mixed light, be favorable to the narrow frame or the slim design of product.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of another embodiment of a backlight module provided in the embodiment of the invention;
fig. 3 is a schematic view illustrating a connection structure between an LED lamp and a lamp panel in a backlight module according to an embodiment of the present invention when the LED lamp is rotated at a first rotation angle;
fig. 4 is a schematic view illustrating a connection structure between an LED lamp and a lamp panel when the LED lamp in the backlight module provided in the embodiment of the present invention is at a second turning angle.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Aiming at the technical problem that the backlight module in the prior art is not beneficial to narrowing the frame and thinning the product due to the fact that the backlight module is limited by the light-emitting angle of an LED lamp, the embodiment of the invention provides the backlight module, the display device and the control method of the backlight module, the light-emitting angle of a point light source can be enlarged, light provided by the backlight module is more uniform, the light mixing height is reduced, and the design of narrowing the frame or thinning the product is facilitated.
As shown in fig. 1 to 4, the backlight module provided in the embodiment of the present invention includes:
a light guide plate 100;
a light source part disposed at a light incident side of the light guide plate 100, the light source part including: the lamp panel 201, the lamp panel 201 includes a mounting surface 2011 facing the light incident side of the light guide plate 100; the plurality of LED lamps 202 are disposed on the mounting surface 2011, a light emitting surface of each LED lamp 202 faces to the light incident side of the light guide plate 100, and each LED lamp 202 can perform steering motion on the lamp panel 201, wherein a steering angle of the LED lamp 202 changes, and a relative angle between the light emitting surface and the light incident side of the light guide plate 100 changes;
and a control structure for controlling the LED lamp 202 to perform steering movement.
In the above solution, each LED lamp 202 can perform a turning motion on the lamp panel 201 in the light source component disposed in the backlight module, and when the turning angle of the LED lamp 202 changes during the turning motion, the relative angle between the light emitting surface of the LED lamp 202 and the light incident side of the light guide plate 100 changes, so that the light emitted from the LED lamp 202 can be incident on different areas of the light incident side of the light guide plate 100 when the turning angle is different, as shown in fig. 3, which is a schematic diagram when the relative angle between the light emitting surface of the LED lamp 202 and the light incident side of the light guide plate 100 is a first angle, the first angle can be 0 °, and as shown in fig. 4, which is a schematic diagram when the relative angle between the light emitting surface of the LED lamp 202 and the light incident side of the light guide plate is a second angle, compared with the prior art in which the LED lamp is fixedly disposed, the emitted light can only be incident on a specific area of the light incident side of the light guide plate, the LED lamp performs the turning motion, the luminous angle can be enlarged, so that the purposes of reducing the light mixing height and enabling the light mixing to be more uniform can be achieved, and the narrow frame or thin design of the product is facilitated.
In the above solution, the purpose of the turning motion of the LED lamp 202 is to expand the light emitting angle of the light emitted from the light emitting surface of the LED lamp 202, and the turning motion may be: the LED lamp 202 performs vertical swing motion (for example, a swing angle of 120 degrees) in a direction perpendicular to the mounting surface 2011 of the lamp panel 201 with a straight line perpendicular to the mounting surface 2011 of the lamp panel 201 as a center line, which may also be: LED lamp 202 is around a perpendicular to the straight line of the installation face 2011 of lamp plate 201 rotates for the rotation axis, and is at the perpendicular to in the rotation process go up and down swing motion in the installation face 2011 direction of lamp plate 201, in the motion process, the light emitting area of LED lamp 202 and the contained angle between the income light side of light guide plate 100 can change to, LED lamp 202 can turn to the motion with predetermined frequency, and this predetermined frequency can be preset, is greater than the distinguishable frequency of people's eye the best.
In addition, when each LED lamp 202 performs a turning motion, the turning frequency of each LED lamp 202 is the same, and each LED lamp 202 may move synchronously, that is, the turning angles of each LED lamp 202 are consistent at any time; alternatively, the turning angles of two adjacent LED lamps 202 in each LED lamp 202 are different.
In addition, the LED lamp 202 performs a turning motion on the lamp panel 201, which can be implemented in various ways, and is not limited in the embodiments of the present invention, and the following only provides a preferred embodiment:
in the embodiment provided by the present invention, as shown in fig. 3 and 4, the LED lamp 202 includes:
an LED lamp body 2021, the LED lamp body 2021 including a back surface disposed opposite the light emitting surface;
a spherical universal rotating body 2022 arranged on the back of the LED lamp body 2021;
be equipped with recess 2012 on the installation face 2011 of lamp plate 201, the internal surface of recess 2012 be with the spherical curved surface that the surface of universal rotor 2022 matches, universal rotor 2022 imbeds in the recess 2012, and can the recess 2012 internal rotation, in order to drive LED lamp body 2021 turns to.
Adopt above-mentioned scheme, LED lamp body 2021 can be the LED encapsulation piece, sets up globular universal rotor 2022 in the back one side of this LED lamp body 2021, and this universal rotor 2022 imbeds in the recess 2012 of lamp plate 201 to can rotate in this recess 2012, like this, when universal rotor 2022 rotates, can drive LED lamp body 2021 and turn to. This kind of simple structure only needs to set up universal rotor 2022 on LED lamp 202, and it can to open recess 2012 on lamp plate 201, and can satisfy the various angle demands that turn to of LED lamp 202.
It should be understood that, in practical applications, the purpose of the LED lamp 202 to perform the turning motion on the lamp panel 201 may also be achieved by other manners, for example, a mounting bracket may also be disposed on the mounting surface 2011 of the lamp panel 201, the LED lamp 202 is mounted on the mounting bracket through a rotating shaft disposed parallel to the mounting surface 2011, and the rotating shaft is driven to rotate on the mounting bracket to drive the LED lamp 202 to turn; and so on. The specific structure of the LED lamp 202 for performing the turning motion is not listed here.
In addition, in the above-mentioned solution, in order to ensure the steering flexibility of the LED lamp 202, as shown in the figure, a rotating shaft 2023 is disposed on the back surface of the LED lamp body 2021, the universal rotating body 2022 is disposed at one end of the rotating shaft 2023 far from the LED lamp body 2021, and the shaft diameter of the rotating shaft 2023 is smaller than the outer diameter of the sphere of the universal rotating body 2022.
In addition, in the embodiment provided by the present invention, as shown in fig. 3 and fig. 4, the LED lamp body 2021 is provided with a first electrode 210 and a second electrode 220; the inner surface of the groove 2012 is provided with a first electrode contact area 230 and a second electrode contact area 240 which are insulated from each other; at least one part of the universal rotating body 2022 is an insulation region; the first electrode 210 passes through the insulating region and is in contact connection with the first electrode contact region 230; the second electrode 220 penetrates the insulating region, and is in contact with the second electrode contact region 240, wherein the first electrode 210 and the second electrode 220 are insulated from each other in the insulating region.
Two electrodes, namely a first electrode 210 and a second electrode 220, are arranged on the LED lamp 202, the first electrode 210 can be a positive electrode, the second electrode 220 can be a negative electrode, and the first electrode 210 and the second electrode 220 need to be connected with a circuit on the lamp panel 201 to ensure normal power-on luminescence of the LED lamp 202. Because the LED lamp 202 can turn, in the above scheme, the inner surface of the groove 2012 is provided with the first electrode contact area 230 and the second electrode contact area 240, the first electrode contact area 230 and the second electrode contact area 240 are connected to a circuit, and the coverage of the first electrode contact area 230 enables the first electrode 210 to be always in contact connection with the first electrode contact area 230 during the turning process of the LED lamp 202, and the coverage of the second electrode contact area 240 enables the second electrode 220 to be always in contact connection with the second electrode contact area 240 during the turning process of the LED lamp 202, so as to ensure the normal power on of the LED lamp 202.
It should be noted that, in the above solution, the coverage of the first electrode contact area 230 and the second electrode contact area 240 may be determined according to the turning movement range of the LED lamp 202, and the first electrode contact area 230 and the second electrode contact area 240 are required to enable the inner surface of the groove 2012 on the lamp panel 201 and the universal rotating body 2022 to rotate freely. For example, as shown in fig. 3 and 4, the first electrode contact region 230 and the second electrode contact region 240 are formed directly on the inner surface of the groove 2012, and are both arc-shaped smooth curved surfaces flush with the inner surface of the groove 2012; alternatively, in other embodiments, the first electrode contact area 230 and the second electrode contact area 240 may be slightly recessed on the inner surface of the groove 2012, and accordingly, the first electrode 210 and the second electrode 220 are protruded on the outer surface of the gimbal rotator 2022.
In addition, in the above-mentioned solution, in order to ensure that the first electrode 210 and the second electrode 220 are insulated from each other on the universal rotating body 2022, an insulating region may be provided on the universal rotating body 2022, and the insulating region may be formed by an insulating material provided on the universal rotating body 2022 alone, or the entire universal insulator may be made of an insulating material.
In an exemplary embodiment, the first electrode 210 and the second electrode 220 pass through the interior of the gimbal rotor 2022 and are in contact with a first electrode contact region 230 and a second electrode contact region 240, respectively.
In another exemplary embodiment, the first electrode 210 and the second electrode 220 are disposed on an outer surface of the gimbal rotor 2022.
It should be understood that, in other embodiments, the first electrode 210 and the second electrode 220 may also be powered with the lamp panel 201 in other manners, for example, the first electrode 210 and the second electrode 220 on the LED lamp body 2021 may also be connected with a circuit on the lamp panel 201 by using a connection wire, however, when the LED lamp 202 turns for a long time, the problem of wire breakage and the like is likely to occur, and by using the manner of providing the electrode contact region on the inner surface of the groove 2012, the product life is longer, and the connection is more secure.
In addition, it should be noted that the specific arrangement positions of the first electrode contact area 230 and the second electrode contact area 240 in the groove 2012 are not limited, and are preferably arranged at the bottom position of the groove 2012.
Furthermore, as shown in fig. 3 and 4, in the embodiment of the present invention, the universal rotating body 2022 is a magnetic structure, and has at least one pair of magnetic poles, each pair of magnetic poles includes a first magnetic pole 300 and a second magnetic pole 400 with opposite polarities, and the first magnetic pole 300 and the second magnetic pole 400 are respectively disposed on two sides of the universal rotating body 2022;
the control structure includes at least one magnetic field generating unit, the magnetic field generating unit set up in on the lamp plate 201, and can be in the magnetic field is produced around universal rotating body 2022, and produced magnetic field with predetermined frequency transform magnetic field direction, in order to attract alternately or repel universal rotating body 2022, so that universal rotating body 2022 carries out steering motion.
In the above solution, the universal rotating body 2022 uses the attraction and repulsion of the magnetic field to realize the rotation. Specifically, the universal rotating body 2022 is a magnetic magnet structure (which may be a magnetic structure entirely or partially), and at least one pair of magnetic poles with opposite polarities is provided on the universal rotating body 2022, so that by generating a magnetic field around the universal rotating body 2022 and changing the direction of the magnetic field at a predetermined frequency, an attractive force or a repulsive force can be alternately generated between the pair of magnetic poles on the universal rotating body 2022, thereby driving the universal rotating body 2022 to rotate to realize the steering motion of the LED lamp 202.
It should be noted that there may be a pair of magnetic poles on the universal rotating body 2022, and accordingly there is one magnetic field generating unit acting on the pair of magnetic poles, and the magnetic pole direction of the pair of magnetic poles determines the turning direction of the universal rotating body 2022, and at this time, the positions on both sides of the pair of magnetic poles on the universal rotating body 2022 will swing up and down to turn the LED lamp 202.
There can also be two at least pairs of magnetic poles on the universal rotor 2022, just two at least pairs of magnetic poles are in follow on the universal rotor 2022 the circumference of a predetermined circular cross section of universal rotor 2022 carries out circumference and distributes, and first magnetic pole 300 and second magnetic pole 400 are located respectively in every pair of magnetic pole the relative both sides of universal rotor 2022, wherein predetermined circular cross section does the light emitting area of LED lamp 202 with when relative angle between the light guide plate 100 is reference angle, universal rotor 2022 with a parallel circular cross section in light incident side of light guide plate 100.
With the above scheme, when the universal rotating body 2022 has at least two pairs of magnetic poles, correspondingly, the magnetic field generating units have at least two magnetic poles, and one magnetic field generating unit acts on a corresponding pair of magnetic poles, so as to change the magnetic field direction of each magnetic field generating unit according to a specific frequency to alternately act on each pair of magnetic poles for attraction or repulsion, thereby achieving the purpose that the universal rotating body 2022 drives the LED lamp body 2021 to swing up and down in at least two directions.
In the embodiment provided by the present invention, as shown in fig. 3 and 4, the magnetic field generating unit includes:
a first coil 500 disposed on the lamp panel 201 and located at one side of the first magnetic pole 300, wherein a current signal input to the first coil 500 changes, and a magnetic acting force generated between the first coil 500 and the first magnetic pole 300 changes to attract or repel the universal rotator 2022;
the second coil 600 is arranged on the lamp panel 201 and located on one side of the second magnetic pole 400, a current signal is input to the second coil 600 to change, and a magnetic acting force generated between the second coil 600 and the second magnetic pole 400 is changed to attract or repel the universal rotating body 2022;
and a current control part for inputting a current signal varying at a predetermined frequency to the first coil 500 and the second coil 600, and connected to the first coil 500 and the second coil 600.
By adopting the above scheme, the magnetic field generating unit is implemented by using two sets of coils, namely the first coil 500 and the second coil 600, which are respectively and correspondingly arranged at the positions of the two magnetic poles, wherein when the input current signal on the first coil 500 changes, an attraction or repulsion force can be generated between the first coil and the first magnetic pole 300, when the input current signal on the second coil 600 changes, an attraction or repulsion force can be generated between the second coil and the second magnetic pole 400, and the universal rotating body 2022 can rotate by using the magnetic acting force generated between the two magnetic poles and the two coils to change alternately. The current signal may comprise a current direction or a current magnitude, etc. For example, a positive current is input to the first coil 500 to generate an attractive force with the first magnetic pole 300, a negative current is input to the second coil 600 at this time, a repulsive force is generated between the second coil 600 and the second magnetic pole 400, and the universal rotating body 2022 is subjected to different magnetic forces on the left and right sides where the first magnetic pole 300 and the second magnetic pole 400 are disposed, so as to generate a moment, and deflects to the side where the first magnetic pole 300 is located; then, a negative current is input to the first coil 500 to generate a repulsive force with the first magnetic pole 300, a positive current is input to the second coil 600 to generate an attractive force with the second magnetic pole 400, and the universal rotating body 2022 is subjected to different magnetic forces on the left and right sides where the first magnetic pole 300 and the second magnetic pole 400 are arranged to generate a moment to deflect to the side where the second magnetic pole 400 is located; as such, positive and negative currents are alternately input to the first and second coils 500 and 600 at a predetermined frequency to achieve the steering motion of the LED lamp 202.
It should be noted that, in other embodiments, the magnetic field generating unit may also be implemented by other structures, not limited to a coil, for example, the magnetic field generating unit may also be implemented by a permanent magnet, and the change of the magnetic field direction may be implemented by moving the permanent magnet, for example, rotating the permanent magnet, so that two magnetic poles thereof alternately change positions, thereby alternately generating an attractive force or a repulsive force with the first magnetic pole 300 and the second magnetic pole 400 to drive the universal rotating body 2022 to rotate, so as to implement the steering of the LED lamp 202.
Compared with a mode of generating a magnetic field by adopting a permanent magnet, the mode of generating the magnetic field by adopting the coil can realize the steering motion of the LED lamp by controlling the change of an input current signal, has simple structure and easier control of steering frequency, and generates the magnetic field by adopting the moving permanent magnet, so that the structure is more complicated and the motion frequency is more difficult to control.
In addition, it should be noted that, in the embodiment provided by the present invention, when the universal rotating body 2022 has at least two pairs of magnetic poles, correspondingly, the number of the magnetic field generating units is at least two, and one magnetic field generating unit includes the first coil 500 and the second coil 600, which can act on the corresponding pair of magnetic poles, respectively, and the purpose of driving the LED lamp body 2021 to perform the up-and-down swinging motion in at least two directions by changing the magnetic field direction of each magnetic field generating unit according to a specific frequency so as to alternately act on the attraction or repulsion of each pair of magnetic poles is achieved. Wherein, in order to avoid the interference between adjacent coils, a magnetic field shielding structure can be arranged between the adjacent coils.
In addition, the backlight module provided in the embodiment of the present invention may be a direct-in type backlight module, in which the light incident side of the light guide plate 100 is opposite to the light exiting side of the light guide plate 100, and the plurality of LED lamps 202 are distributed in an array on the mounting surface 2011 of the lamp panel 201. For the direct-in type backlight module, because the LED lamp 202 can perform steering motion on the lamp panel 201, the light emitting angle can be enlarged, and the light mixing height can be reduced, so that the thickness of the backlight module can be reduced, and the thin design of a display product can be realized.
In addition, the backlight module provided in the embodiment of the present invention may also be a side-in type backlight module, the light incident side of the light guide plate 100 is disposed adjacent to the light exiting side of the light guide plate 100, and the plurality of LED lamps 202 are arranged on the mounting surface 2011 of the lamp panel 201 at intervals along the extending direction of the transition edge between the light incident side and the light exiting side. For the side-in type backlight module, because the LED lamp 202 can perform steering motion on the lamp panel 201, the light emitting angle can be enlarged, and the light mixing height can be reduced, so that the frame width of the backlight module can be reduced, and the narrow frame design of a display product is facilitated.
In addition, the embodiment of the present invention further provides a display device, including the backlight module provided in the embodiment of the present invention, and obviously, the display device provided in the embodiment of the present invention can also bring the beneficial effects brought by the backlight module provided in the embodiment of the present invention, and details thereof are not repeated.
In addition, the embodiment of the invention also provides a control method of the backlight module, which is applied to the backlight module provided by the embodiment of the invention, and the method comprises the following steps:
and controlling each LED lamp 202 to perform steering movement on the lamp panel 201.
In the above scheme, when the backlight module provides a light source for the display screen, each LED lamp 202 is controlled to perform steering motion on the lamp panel 201, and when the steering angle of the LED lamp 202 changes, the relative angle between the light emitting surface of the LED lamp 202 and the light incident side of the light guide plate 100 changes, so that the light emitted from the LED lamp 202 can be incident to different areas of the light incident side of the light guide plate 100 when the steering angle is different, and compared with the prior art in which the LED lamp 202 is fixed, and the light emitted from the LED lamp 202 can only be incident to a specific area of the light incident side of the light guide plate 100, the light emitting angle of the LED lamp 202 can be enlarged by the steering motion of the LED lamp 202, so that the light mixing height can be reduced, the purpose of uniform light mixing can be achieved, and the narrow-frame or thin design of a product is facilitated.
In the method provided by the present invention, further, the controlling each LED lamp 202 to perform a turning motion on the lamp panel 201 specifically includes:
the magnetic field generated around the universal rotating body 2022 is controlled to change the direction of the magnetic field at a predetermined frequency to alternately attract or repel the universal rotating body 2022, so that the universal rotating body 2022 performs a steering motion.
Further, the controlling generates a magnetic field around the universal rotating body 2022, and the generated magnetic field changes the direction of the magnetic field at a predetermined frequency to alternately attract or repel the universal rotating body 2022, so as to make the universal rotating body 2022 perform steering motion, specifically comprising:
current signals varying at a predetermined frequency are input to the first coil 500 and the second coil 600 to alternately attract or repel the first magnetic pole 300 and the second magnetic pole 400, so that the universal rotating body 2022 performs a rotational motion.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A backlight module includes: a light guide plate; and a light source component arranged at the light incident side of the light guide plate; characterized in that the light source part includes:
the lamp panel comprises a mounting surface which faces the light incident side of the light guide plate;
the LED lamp comprises a light guide plate, a plurality of LED lamps and a plurality of LED lamps, wherein the light emitting surface of each LED lamp is arranged towards the light incident side of the light guide plate, each LED lamp can perform steering motion on the lamp plate, the steering angle of the LED lamps is changed, and the relative angle between the light emitting surface and the light incident side of the light guide plate is changed;
the control structure is used for controlling the LED lamp to perform steering motion;
the LED lamp includes:
the LED lamp body comprises a back surface arranged opposite to the light-emitting surface;
the spherical universal rotating body is arranged on the back surface of the LED lamp body;
be equipped with the recess on the installation face of lamp plate, the internal surface of recess be with the spherical curved surface of the surface matching of universal rotor, universal rotor embedding in the recess, and can the recess internal rotation, in order to drive the LED lamp body turns to.
2. The backlight module according to claim 1,
the LED lamp body is provided with a first electrode and a second electrode;
the inner surface of the groove is provided with a first electrode contact area and a second electrode contact area which are insulated from each other;
at least one part of the universal rotating body is an insulation area;
the first electrode penetrates through the insulating region and is in contact connection with the first electrode contact region;
the second electrode penetrates through the insulating region and is in contact connection with the second electrode contact region,
wherein the first electrode and the second electrode are arranged in the insulating region in an insulated manner.
3. The backlight module according to claim 2,
the first electrode and the second electrode penetrate through the inner part of the universal rotating body; alternatively, the first electrode and the second electrode are disposed on an outer surface of the universal rotating body.
4. The backlight module according to claim 1,
the universal rotating body is of a magnet structure and is provided with at least one pair of magnetic poles, each pair of magnetic poles comprises a first magnetic pole and a second magnetic pole with opposite polarities, and the first magnetic pole and the second magnetic pole are respectively arranged on two sides of the universal rotating body;
control structure includes at least one magnetic field and produces the unit, magnetic field produce the unit set up in on the lamp plate, and can produce magnetic field around universal rotor, and produced magnetic field with predetermined frequency transform magnetic field direction, attract or repel alternately universal rotor, so that universal rotor carries out steering motion.
5. The backlight module according to claim 4,
the magnetic field generating unit includes:
the first coil is arranged on the lamp panel and positioned on one side of the first magnetic pole, an input current signal on the first coil changes, and a magnetic acting force generated between the first coil and the first magnetic pole changes to attract or repel the universal rotating body;
the second coil is arranged on the lamp panel and positioned on one side of the second magnetic pole, an input current signal on the second coil changes, and a magnetic acting force generated between the second coil and the second magnetic pole changes to attract or repel the universal rotating body;
and a current control part for inputting a current signal varying at a predetermined frequency to the first coil and the second coil, and connected to the first coil and the second coil.
6. The backlight module according to claim 5,
universal rotor has two at least pairs of magnetic poles, just two at least pairs of magnetic poles are in follow on the universal rotor the circumference of a predetermined circular cross section of universal rotor carries out circumference and distributes, and first magnetic pole and second magnetic pole are located respectively in every pair of magnetic pole the relative both sides of universal rotor, wherein predetermined circular cross section does the light emitting area of LED lamp with when relative angle between the light guide plate is reference angle, universal rotor with the parallel circular cross section of the income light side of light guide plate.
7. The backlight module according to any of claims 1 to 6,
the backlight module is a straight-in type backlight module, the light inlet side of the light guide plate is arranged opposite to the light outlet side of the light guide plate, and the LED lamp arrays are distributed on the mounting surface of the lamp panel;
or, the backlight module is a side-in type backlight module, the light incident side of the light guide plate is adjacently arranged with the light emergent side of the light guide plate, and the plurality of LED lamps are arranged on the mounting surface of the lamp panel at intervals along the extension direction of the transition edge between the light incident side and the light emergent side.
8. A display device comprising the backlight module according to any one of claims 1 to 7.
9. A method for controlling a backlight module according to any one of claims 1 to 7, the method comprising:
and controlling each LED lamp to perform steering motion on the lamp panel.
10. The method according to claim 9, applied to the backlight module according to claim 5, wherein the controlling of each of the LED lamps to perform a turning motion on the lamp panel specifically comprises:
current signals varying at a predetermined frequency are input to the first coil and the second coil to alternately attract or repel the first magnetic pole and the second magnetic pole to cause the universal rotating body to perform a rotational motion.
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| CN201811276071.9A CN109188773B (en) | 2018-10-30 | 2018-10-30 | Backlight module, display device and control method of backlight module |
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| CN201811276071.9A CN109188773B (en) | 2018-10-30 | 2018-10-30 | Backlight module, display device and control method of backlight module |
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| CN109188773B true CN109188773B (en) | 2022-04-19 |
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| CN110032002B (en) * | 2019-04-12 | 2022-03-01 | 深圳康佳电子科技有限公司 | Lamp strip rotation type backlight unit and display device |
| CN110596954B (en) * | 2019-09-25 | 2022-04-12 | 京东方科技集团股份有限公司 | Backlight module, display panel and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6315432B1 (en) * | 1999-12-13 | 2001-11-13 | Hon Hai Precision Ind. Co., Ltd. | Light-emitting diode (LED) device |
| CN1700071A (en) * | 2005-06-29 | 2005-11-23 | 上海中策工贸有限公司 | Rotary type backlight lamp of LCDs |
| JP2008034267A (en) * | 2006-07-29 | 2008-02-14 | Citizen Electronics Co Ltd | Illumination device, and liquid crystal display device |
| CN100582559C (en) * | 2006-12-19 | 2010-01-20 | 财团法人工业技术研究院 | Illuminating device capable of adjusting beam angle |
| CN101315491A (en) * | 2008-06-26 | 2008-12-03 | 上海广电光电子有限公司 | Scanning back light module unit |
| CN101344234B (en) * | 2008-08-22 | 2010-09-08 | 友达光电股份有限公司 | Display equipment and its adjustable illuminating module |
| CN102913816B (en) * | 2012-09-28 | 2015-11-11 | 京东方科技集团股份有限公司 | Side-light backlight module and liquid crystal indicator |
| CN105158978B (en) * | 2015-10-22 | 2018-06-29 | 京东方科技集团股份有限公司 | Backlight and display device |
| CN205227026U (en) * | 2015-10-23 | 2016-05-11 | 深圳市雷川照明电器有限公司 | LED magnet shot -light head |
| CN105522588A (en) * | 2016-03-02 | 2016-04-27 | 郭嘉辉 | Magnetic ball-joint robot |
| CN206557507U (en) * | 2017-03-22 | 2017-10-13 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
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