CN116841088B - Side-in type backlight structure, display and local backlight dimming method - Google Patents
Side-in type backlight structure, display and local backlight dimming method Download PDFInfo
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- CN116841088B CN116841088B CN202311108305.XA CN202311108305A CN116841088B CN 116841088 B CN116841088 B CN 116841088B CN 202311108305 A CN202311108305 A CN 202311108305A CN 116841088 B CN116841088 B CN 116841088B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 39
- 229920002799 BoPET Polymers 0.000 claims description 17
- 238000005286 illumination Methods 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 12
- 238000013016 damping Methods 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 7
- 239000013589 supplement Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 6
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- 239000004020 conductor Substances 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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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
-
- 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
- G02F1/133504—Diffusing, scattering, diffracting elements
-
- 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
- G02F1/133553—Reflecting elements
-
- 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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention relates to the technical field of displays, in particular to a side-in type backlight structure, a display and a local backlight dimming method, wherein the side-in type backlight structure comprises a controller, a light guide plate, a plurality of light reflecting plates and a lamp frame arranged around the light reflecting plates; a plurality of lighting modules are arranged in the lamp frame, and the reflecting plate is matched with the lighting modules for use; the display comprises a side-in backlight structure, an outer frame, a rear shell, a liquid crystal display module and a front frame, wherein the liquid crystal display module is arranged between the front frame and the light guide plate; the local backlight dimming method comprises the following steps: s1, dividing a light guide plate into M multiplied by N areas; s2, turning off the first LED lamps positioned on the upper side and the lower side of the row of the region Xi to be adjusted; s3, turning on a plurality of second LED lamps, adjusting the angles of the second LED lamps, and reflecting light to the corresponding areas of the light guide plate through the reflecting plate; s4, controlling the power-off of the reflector after the corresponding area. The backlight structure is matched with the dimming method, so that the effect of the display when displaying black is improved, and the stable display brightness is ensured.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a side-in backlight structure, a display and a local backlight dimming method.
Background
The side-in backlight is characterized in that a dot light source is arranged on the side edge of a specially designed light guide plate and used as an LED backlight source, the number of LEDs is small, and a display adopting the side-in backlight structure can be made thinner. When the side-in type backlight is used for local dimming, one or more groups of LED light sources on two sides or one side of the light guide plate are usually turned off, and the problem exists here that the brightness of the light guide plate is possibly reduced because the side-in type backlight is formed by a relatively uniform area light source after the LED light sources enter the light guide plate from the side surface; in addition, in the prior art, a light reflecting plate is installed at the rear of the light guiding plate, so that light scattered from the light guiding plate is reflected back into the light guiding plate, which has a problem that even if the corresponding LED lamp is turned off, the reflected light can still be reflected to the corresponding dimming area due to the reflecting effect of the light reflecting plate, and the dimming effect is affected.
Disclosure of Invention
The present invention is directed to a side-in backlight structure, a display and a local backlight dimming method, so as to solve the above-mentioned problems in the prior art.
In order to achieve the above purpose, the present invention provides the following technical solutions: a side-in backlight structure comprises a controller, a light guide plate, a plurality of light reflecting plates and a lamp frame arranged around the light reflecting plates; the lamp frame is internally provided with a plurality of lighting modules, each lighting module comprises a first lighting component and a second lighting component, the reflecting plate is matched with the lighting module for use, light emitted by the second lighting component irradiates a certain area of light guide through the reflecting plate to provide illumination for the area, and the controller is connected with the lighting module.
The utility model provides a display, includes a side income formula backlight structure, still includes frame, backshell, liquid crystal display module, preceding frame, reflector panel and backshell surface connection, liquid crystal display module sets up between preceding frame and light guide plate, preceding frame is connected with the shell, the controller is connected with the frame outside surface, the controller is connected with liquid crystal display module.
Preferably, a partition board is arranged between the two connected lighting modules in the lamp frame.
Preferably, the first lighting component comprises a first LED lamp, the first LED lamp is connected with the inner wall of the lamp frame, the second lighting component comprises a shading box, a second LED lamp and a connecting box arranged on one side of the shading box, a connecting shaft is arranged at the lower part of the connecting box, and the lower part of the connecting shaft is rotationally connected with a corresponding partition plate.
Preferably, the illumination assembly II further comprises a spatial filter assembly matched with the LED lamp II, the spatial filter assembly is arranged inside the shading box, the spatial filter assembly comprises a mutually matched condensing objective lens and a pinhole, the shading box is made of opaque materials, an opening is formed in one side of the shading box, the pinhole is arranged in the opening, and light rays emitted by the LED lamp II are emitted out of the shading box after passing through the condensing objective lens and the pinhole.
Preferably, a permanent magnet is arranged on the inner side of the connecting box, an electromagnet I and an electromagnet II are further arranged on the inner side of the lamp frame, the polarities of the electromagnet I and the electromagnet II facing to one side surface of the shading box are opposite, and the electromagnet I and the electromagnet II are respectively connected with the controller.
Preferably, the lighting module further comprises an angle adjusting assembly, the angle adjusting assembly comprises an angle sensor, a damping block, an electromagnet III, an electromagnet IV, a cushion block and a U-shaped conducting tube, the angle sensor is arranged on the lower side of the partition plate, a rotating shaft is arranged on the upper portion of the connecting box, the upper portion of the rotating shaft penetrates through the damping block to be connected with the angle sensor, the electromagnet III and the electromagnet IV are arranged on two sides of the rotating shaft, the cushion block is arranged on one side of the electromagnet IV, the electromagnet IV is connected with the inner side of the lamp frame through the cushion block, the damping block is connected with the inner side surface of the lamp frame, and the electromagnet III and the electromagnet IV are respectively connected with the controller; the U-shaped conductive tube is arranged on the inner side of the rotating shaft, the rotating shaft is of a hollow structure, a wire guide is formed in one side of the rotating shaft, and the U-shaped conductive tube is connected with the controller.
Preferably, the reflecting plate comprises a reflecting film, a liquid crystal film, a transparent film, two ITO-PET films and two EVA films, wherein two sides of the liquid crystal film are connected with the ITO-PET films, the reflecting film and the transparent film are positioned at two sides of the liquid crystal film, the reflecting film and the transparent film are respectively combined with the ITO-PET films through the EVA films, and the ITO-PET films are connected with the controller.
A local backlight dimming method uses a display, and specifically comprises the following steps:
s1, dividing a light guide plate into M multiplied by N areas, wherein each area is set as Xi, and simultaneously, correspondingly dividing the liquid crystal plate into M multiplied by N areas, wherein M=m and N=n;
s2, turning off the first LED lamps positioned on the upper side and the lower side of the row of the region Xi to be adjusted;
s3, turning on a plurality of second LED lamps, adjusting the angles of the second LED lamps, and reflecting light to the corresponding areas of the light guide plate through the reflecting plate to supplement light;
s4, controlling the power-off of the reflector after the corresponding area.
Preferably, in the step S2, the LED lamps on the left and right sides of the row where the region Xi to be adjusted is located may be turned off simultaneously; in step S3, the number of the LED lamps two may be selected according to the size of the display screen, and the corresponding area of the light guide plate refers to the middle of the row or column where the area Xi to be adjusted is located.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the structure of the reflecting plate can reflect light when the LED lamp is electrified, the fog-like specific reference is made to the principle of the electric fog glass when the LED lamp is powered off, the light emitted by the LED lamp II can irradiate the reflecting film after being processed by the spatial filtering component in the electrified state, the light is reflected, the emergent angle of the reflected light can be controlled by controlling the angle of the LED lamp II, so that the target area irradiated by the light is controlled, in some embodiments, the corresponding reflecting plate at the rear part of X2 is powered off, so that the light cannot reach the reflecting film, scattering occurs in the liquid crystal film, the illumination intensity at the rear part of the X area of the light guide plate is reduced, and a relatively dark area is formed at the rear part of the X area of the light guide plate, so that the black display effect is better; one reflector beside the powered-off reflector is powered on and used for reflecting light rays emitted by the LED lamp II.
According to the invention, in order to prevent the display brightness from being reduced due to the fact that the first LED lamp is turned off, the brightness needs to be supplemented, the second LED lamp positioned on the left side of the X can be rotated out of the lamp frame, and light rays emitted by the second LED lamp are reflected by the reflecting plate and then irradiated to the subarea on the lower side of the X, so that the influence of insufficient illumination caused to other areas of the row where the X is positioned after the first LED lamp is turned off is reduced, and the display brightness of the area is prevented from being darkened after dimming.
According to the invention, the electromagnet III and the electromagnet IV are electrified through the controller, the U-shaped conductive tube is simultaneously connected, current flows in from one end of the U-shaped conductive tube and flows out from the other end of the U-shaped conductive tube, so that the current directions of straight line parts at two sides of the U-shaped conductive tube are opposite, the U-shaped conductive tube rotates under the action of the force applied by an electrified conductor in a magnetic field to drive the rotating shaft to rotate, the rotating shaft drives the shading box at the lower part of the U-shaped conductive tube to rotate, the space filtering component in the shading box and the LED lamp II rotate along with each other, the rotating shaft rotating angle is measured through the angle sensor, the angle information is transmitted to the controller, the controller cuts off the power of the electromagnet III and the electromagnet IV after the set angle is reached, and simultaneously cuts off the current in the U-shaped conductive tube, and the rotating shaft is kept stable by using the friction resistance of the damping block.
Drawings
FIG. 1 is a schematic diagram of an overall structure of a display according to the present invention;
FIG. 2 is an exploded view of a display structure according to the present invention;
FIG. 3 is a schematic diagram of a side-entry backlight according to the present invention;
FIG. 4 is a schematic elevational view of the structure of FIG. 3 in accordance with the present invention;
FIG. 5 is a cross-sectional view in the B-B direction of FIG. 4 in accordance with the present invention;
FIG. 6 is a schematic view of an illumination module mounting structure according to the present invention;
FIG. 7 is a schematic elevational view of the structure of FIG. 6 in accordance with the present invention;
FIG. 8 is a schematic side view of the structure of FIG. 6 in accordance with the present invention;
FIG. 9 is a cross-sectional view taken along the direction A-A of FIG. 8 in accordance with the present invention;
FIG. 10 is a schematic diagram of the positional relationship and structure of the second lighting assembly, the first electromagnet, the second electromagnet, the third electromagnet and the fourth electromagnet;
FIG. 11 is a front view of FIG. 10 in accordance with the present invention;
FIG. 12 is a top view of FIG. 10;
FIG. 13 is a schematic diagram of a local backlight dimming method according to the present invention;
FIG. 14 is a schematic diagram of a local backlight dimming method according to the second embodiment of the present invention;
FIG. 15 is a schematic view of a reflector structure according to the present invention;
fig. 16 is a block diagram illustrating steps of a local backlight dimming method according to the present invention.
In the figure: the controller 1, the light guide plate 2, the light reflecting plate 3, the lamp frame 4, the lighting module 5, the lighting module one 51, the lighting module two 52, the outer frame 6, the rear case 7, the liquid crystal display module 8, the front frame 9, the partition board 10, the electromagnet one 11, the electromagnet two 12, the LED lamp one 5101, the light shielding case 5201, the LED lamp two 5202, the connection case 5203, the connection shaft 5204, the spatial filter module 5205, the permanent magnet 5206, the condenser objective 52051, the pinhole 52052, the angle adjusting module 53, the angle sensor 5301, the damping block 5302, the electromagnet three 5303, the electromagnet four 5304, the cushion 5305, the U-shaped conductive tube 5306, the rotation shaft 5307, the reflective film 301, the liquid crystal film 302, the transparent film 303, the ITO-PET film 304, and the EVA film 305.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
Referring to fig. 1-7 and fig. 13-15, the present invention provides a technical solution: a side-in type backlight structure comprises a controller 1, a light guide plate 2, a plurality of light reflecting plates 3 and a lamp frame 4 arranged around the light reflecting plates 3; a plurality of lighting modules 5 are arranged in the lamp frame 4, the lighting modules 5 comprise a first lighting component 51 and a second lighting component 52, the reflector plate 3 is matched with the lighting modules 5 for use, light rays emitted by the second lighting components 52 irradiate a certain area of light guide after passing through the reflector plate 3, illumination is provided for the area, and the controller 1 is connected with the lighting modules 5.
The utility model provides a display, includes a side income formula backlight structure, still includes frame 6, backshell 7, liquid crystal display module 8, preceding frame 9, reflector panel 3 and backshell 7 surface connection, and liquid crystal display module 8 installs between preceding frame 9 and light guide plate 2, and preceding frame 9 is connected with the shell, and controller 1 is connected with frame 6 outside surface, and controller 1 is connected with liquid crystal display module 8.
A partition board 10 is arranged between two connected lighting modules 5 in the lamp frame 4.
The first lighting component 51 comprises a first LED lamp 5101, the first LED lamp 5101 is connected with the inner wall of the lamp frame 4, the second lighting component 52 comprises a shading box 5201, a second LED lamp 5202 and a connecting box 5203 arranged on one side of the shading box 5201, a connecting shaft 5204 is arranged on the lower portion of the connecting box 5203, and the lower portion of the connecting shaft 5204 is rotationally connected with the corresponding partition board 10.
The illumination subassembly two 52 still include with LED lamp two 5202 complex spatial filter subassembly 5205, spatial filter subassembly 5205 installs inside hiding the light box 5201, spatial filter subassembly 5205 includes spotlight objective 52051 and pinhole 52052 mutually supporting, and the preparation of opaque material is adopted to shading box 5201, and the opening has been seted up to shading box 5201's one side, and pinhole 52052 installs in the opening, and the light that LED lamp two 5202 sent passes through spotlight objective 52051 and pinhole 52052 after the effluvium shading box 5201.
The permanent magnet 5206 is installed to the inboard of connection box 5203, and lamp frame 4 inboard still installs electro-magnet 11 and electro-magnet two 12, and electro-magnet 11 and electro-magnet two 12 face the shading box 5201 one side surface polarity opposite, and electro-magnet 11 and electro-magnet two 12 are connected with controller 1 respectively.
The reflector 3 comprises a reflector film 301, a liquid crystal film 302, a transparent film 303, two ITO-PET films 304 and two EVA films 305, wherein two sides of the liquid crystal film 302 are connected with the ITO-PET films 304, the reflector film 301 and the transparent film 303 are positioned at two sides of the liquid crystal film 302, the reflector film 301 and the transparent film 303 are combined with the ITO-PET films 304 through the EVA films 305 respectively, and the ITO-PET films 304 are connected with the controller 1.
A local backlight dimming method, a display used, the concrete steps are as follows:
s1, dividing the light guide plate 2 into M multiplied by N areas, wherein each area is set as Xi, and simultaneously, correspondingly dividing the liquid crystal plate into M multiplied by N areas, wherein M=m and N=n;
s2, turning off LED lamps one 5101 positioned on the upper side and the lower side of the row where the region Xi to be adjusted is positioned;
s3, turning on a plurality of second LED lamps 5202, adjusting the angle of the second LED lamps 5202, and reflecting light to the corresponding area of the light guide plate 2 through the reflecting plate to supplement light;
s4, the reflector 3 is powered off after the corresponding area is controlled in a matching mode.
In step S2, the LED lamps one 5101 on the left and right sides of the row where the region Xi to be adjusted is located can be turned off simultaneously; in step S3, the number of the LED lamps two 5202 may be selected according to the size of the display screen, and the corresponding area of the light guide plate 2 refers to the middle of the row or column where the area Xi to be adjusted is located.
When the LED lamp one 5101 is used as a backlight source, the light reflecting plate positioned at the rear part of the area to be regulated is powered off during dimming, so that the quantity of light entering the area of the light guiding plate is reduced.
Example two
Referring to fig. 1-16, the present invention further provides a technical solution:
a side-in type backlight structure comprises a controller 1, a light guide plate 2, a plurality of light reflecting plates 3 and a lamp frame 4 arranged around the light reflecting plates 3; a plurality of lighting modules 5 are arranged in the lamp frame 4, the lighting modules 5 comprise a first lighting component 51 and a second lighting component 52, the reflector plate 3 is matched with the lighting modules 5 for use, light rays emitted by the second lighting components 52 irradiate a certain area of light guide after passing through the reflector plate 3, illumination is provided for the area, and the controller 1 is connected with the lighting modules 5.
The utility model provides a display, includes a side income formula backlight structure, still includes frame 6, backshell 7, liquid crystal display module 8, preceding frame 9, reflector panel 3 and backshell 7 surface connection, and liquid crystal display module 8 installs between preceding frame 9 and light guide plate 2, and preceding frame 9 is connected with the shell, and controller 1 is connected with frame 6 outside surface, and controller 1 is connected with liquid crystal display module 8.
A partition board 10 is arranged between two connected lighting modules 5 in the lamp frame 4.
The first lighting component 51 comprises a first LED lamp 5101, the first LED lamp 5101 is connected with the inner wall of the lamp frame 4, the second lighting component 52 comprises a shading box 5201, a second LED lamp 5202 and a connecting box 5203 arranged on one side of the shading box 5201, a connecting shaft 5204 is arranged on the lower portion of the connecting box 5203, and the lower portion of the connecting shaft 5204 is rotationally connected with the corresponding partition board 10.
The illumination subassembly two 52 still include with LED lamp two 5202 complex spatial filter subassembly 5205, spatial filter subassembly 5205 installs inside hiding the light box 5201, spatial filter subassembly 5205 includes spotlight objective 52051 and pinhole 52052 mutually supporting, and the preparation of opaque material is adopted to shading box 5201, and the opening has been seted up to shading box 5201's one side, and pinhole 52052 installs in the opening, and the light that LED lamp two 5202 sent passes through spotlight objective 52051 and pinhole 52052 after the effluvium shading box 5201.
The permanent magnet 5206 is installed to the inboard of connection box 5203, and lamp frame 4 inboard still installs electro-magnet 11 and electro-magnet two 12, and electro-magnet 11 and electro-magnet two 12 face the shading box 5201 one side surface polarity opposite, and electro-magnet 11 and electro-magnet two 12 are connected with controller 1 respectively.
The lighting module 5 further comprises an angle adjusting component 53, the angle adjusting component 53 comprises an angle sensor 5301, a damping block 5302, an electromagnet three 5303, an electromagnet four 5304, a cushion block 5305 and a U-shaped conductive tube 5306, the angle sensor 5301 is arranged on the lower side of the partition board 10, a rotating shaft 5307 is arranged on the upper portion of the connecting box 5203, the upper portion of the rotating shaft 5307 penetrates through the damping block 5302 to be connected with the angle sensor 5301, the electromagnet three 5303 and the electromagnet four 5304 are arranged on two sides of the rotating shaft 5307, the cushion block 5305 is arranged on one side of the electromagnet four 5304, the electromagnet four 5304 is connected with the inner side of the lamp frame 4 through the cushion block 5305, the damping block 5302 is connected with the inner side surface of the lamp frame 4, and the electromagnet three 5303 and the electromagnet four 5304 are respectively connected with the controller 1.
The U-shaped conductive tube 5306 is mounted inside the rotating shaft 5307, the rotating shaft 5307 is hollow, a wire hole is formed in one side of the rotating shaft 5307, and the U-shaped conductive tube 5306 is connected with the controller 1.
The reflector 3 comprises a reflector film 301, a liquid crystal film 302, a transparent film 303, two ITO-PET films 304 and two EVA films 305, wherein two sides of the liquid crystal film 302 are connected with the ITO-PET films 304, the reflector film 301 and the transparent film 303 are positioned at two sides of the liquid crystal film 302, the reflector film 301 and the transparent film 303 are combined with the ITO-PET films 304 through the EVA films 305 respectively, and the ITO-PET films 304 are connected with the controller 1.
A local backlight dimming method uses a display, and specifically comprises the following steps:
s1, dividing the light guide plate 2 into M multiplied by N areas, wherein each area is set as Xi, and simultaneously, correspondingly dividing the liquid crystal plate into M multiplied by N areas, wherein M=m and N=n;
s2, turning off LED lamps one 5101 positioned on the upper side and the lower side of the row where the region Xi to be adjusted is positioned;
s3, turning on a plurality of second LED lamps 5202, adjusting the angle of the second LED lamps 5202, and reflecting light to the corresponding area of the light guide plate 2 through the reflecting plate to supplement light;
s4, controlling the power-off of the reflector 3 in the corresponding area.
In step S2, the LED lamps one 5101 on the left and right sides of the row where the region Xi to be adjusted is located can be turned off simultaneously; in step S3, the number of the LED lamps two 5202 may be selected according to the size of the display screen, and the corresponding area of the light guide plate 2 refers to the middle of the row or column where the area Xi to be adjusted is located.
The first LED lamp 5101 serves as a backlight source. The LED lamp two 5202 is used as a light supplementing light source, the light guide plate 2 can be supplemented with light, the overall display brightness of the display is maintained, and meanwhile, when the LED lamp one 5101 is damaged, the LED lamp one 5101 is replaced to be used as a backlight light source.
Working principle: as shown in fig. 2, a plurality of strip-shaped light reflecting plates 3 are mounted at the rear part of the lamp frame 4, the width of each light reflecting plate 3 is matched with the width of the lighting module 5, the primary light source of the display of the LED lamp one 5101 in the lighting module 5, the light emitted by the LED lamp one 5101 enters into the light guide plate 2 to provide backlight for the liquid crystal display module 8, and the liquid crystal display module 8 can comprise a liquid crystal plate, a polarizing plate one, a polarizing plate two and a color filter plate.
In the process of carrying out local backlight adjustment on a display, particularly when black is displayed, the direct type backlight source can be realized by turning off LED lamps in different areas in an LED array at the back of the display;
for side-entry backlights, this can be achieved by turning off the LED lights on the top and bottom and/or left and right sides of the adjustment area. In this scheme, the light guide plate 2 is divided into m×n areas, and the liquid crystal panel is correspondingly divided into m×n areas, where m=m, n=n; m is the same as the number of lighting modules 5 in the upper part of the lamp frame 4, N is the same as the number of lighting modules 5 in the side of the lamp frame 4; if it is desired to dim X2 to the shaded area in the figure, the LED light one 5101 on the upper and lower sides of the column where X2 is located can be turned off by the controller 1,
the structure of the reflector 3 makes it possible to reflect light during power-on and make it possible to control the outgoing angle of the reflected light by controlling the angle of the LED lamp two 5202, so as to control the target area irradiated by light. In this embodiment, the corresponding reflector 3 at the rear of the light guide plate 2X2 is powered off, so that light cannot reach the reflective film 301, and light is scattered in the liquid crystal film 302, so that the illumination intensity of the rear of the light guide plate 2X2 region is reduced, and a relatively darker region dark area is formed at the rear of the light guide plate 2X2 region, so that the black display effect is better.
If the X2 and Xi areas need to be dimmed at the same time, the first 5101 and the second 5202 LED lamps on the upper side and the lower side of the row where the X2 is located can be turned off, the corresponding reflective plates 3 at the rear parts of the X2 and the Xi are powered off, so that light cannot reach the reflective film 301, scattering occurs in the liquid crystal film 302, the illumination intensity at the rear part of the area of the light guide plate 2X2 is reduced, a dark area is formed at the rear part of the area of the light guide plate 2X2, and meanwhile, the reflective plate 3 is powered on for reflecting light;
then turning off the first 5101 and second 5202 LED lamps on the two sides of the row where X2 and Xi are located; then, a plurality of second LED lamps 5202 on the upper side of the light guide plate 2 are unscrewed and electrified to supplement the illumination intensity of the row where the X2 is located, the unscrewed second LED lamps 5202 are located between the X2 and the Xi area, the number of the unscrewed second LED lamps 5202 is not less than one, and the number of the unscrewed second LED lamps 5202 can be selected according to the number of the areas spaced between the X2 and the Xi; and the second LED lamp 5202 on the two sides of the light guide plate 2 is unscrewed and electrified to supplement the illumination intensity of other areas of the columns where the X2 and the Xi are positioned, wherein the quantity of the second unscrewed LED lamps 5202 is not less than one, and the second LED lamp 5202 positioned in the middle of the lower area is preferably selected.
Because the first LED lamp 5101 and the second LED lamp 5202 are arranged in the same module, when one first LED lamp 5101 fails, the second LED lamp 5202 arranged on the lower side of the first LED lamp 5101 can replace the failure lamp.
Meanwhile, the space filtering module is installed, noise and an expensive mode in the light beam of the LED lamp II 5202 are adjusted through the focusing objective lens and the pinhole 52052, so that light spots are more concentrated, a set area can be accurately irradiated, dimming is more accurate and controllable, interference to other dimming areas due to the fact that the light spot range is too large and exceeds a defined dimming area is avoided, and therefore an expected display effect cannot be achieved.
In order to prevent the display brightness from being reduced due to the fact that the first LED lamp 5101 is turned off, the brightness needs to be supplemented, the second LED lamp 5202 positioned on the left side of the X2 can be rotated out of the lamp frame 4, light emitted by the second LED lamp 5202 is reflected by the reflecting plate and then irradiates the subarea on the lower side of the X2, so that the influence of insufficient illumination caused to other areas of the row where the X2 is positioned after the first LED lamp 5101 is turned off is reduced, and the display brightness of the area is prevented from being darkened after dimming.
How to rotate the LED lamp II 5202 out of the lamp frame 4 comprises the following specific processes:
the method comprises the steps that the electromagnet III 5303 and the electromagnet IV 5304 of the controller 1 are electrified, the U-shaped conductive tube 5306 is simultaneously connected, current flows in from one end of the U-shaped conductive tube 5306 and flows out from the other end of the U-shaped conductive tube 5306, the current directions of straight line parts on two sides of the U-shaped conductive tube 5306 are opposite, according to the principle that an electrified conductor is acted by force in a magnetic field, the U-shaped conductive tube 5306 rotates under the action of the force to drive the rotating shaft 5307 to rotate, the rotating shaft 5307 drives the shading box 5201 on the lower portion of the rotating shaft 5307 to rotate, the space filtering component 5205 in the shading box 5201 and the LED lamp II 5202 follow rotation, the rotating angle of the rotating shaft 5307 is measured through the angle sensor 5301, the angle information is transmitted to the controller 1, after the set angle is reached, the controller 1 cuts off the electricity of the electromagnet III 5303 and the electromagnet IV 5304, and keeps the rotating shaft 5307 stable by friction resistance of the damping block 5302;
when the LED lamp II 5202 is unscrewed, if the rotating shaft 5307 stays at a position which enables the plane of the U-shaped conductive tube 5306 to be perpendicular to the plane of the electromagnet III 5303, the U-shaped tube is balanced in stress and cannot continue to rotate to unscrew or retract; for this reason, the first electromagnet 11 and the second electromagnet 12 are electrified through the controller 1, so that the first electromagnet 11 and the permanent magnet 5206 repel each other, and the second electromagnet 12 and the permanent magnet 5206 attract each other, so that the light shielding box 5201 is pushed to rotate, the light shielding box 5201 drives the rotating shaft 5307 to rotate for a certain angle, and the rotating shaft 5307 can continue to rotate; in the recycling process of the second LED lamp 5202, the polarities of the first electromagnet 11 and the second electromagnet 12 can be changed, so that the force direction of the permanent magnet 5206 is matched with the rotation direction of the rotating shaft 5307.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides a side income formula backlight structure, includes controller (1), light guide plate (2), a plurality of reflector panel (3), lamp frame (4) that set up around reflector panel (3), its characterized in that: a plurality of lighting modules (5) are arranged in the lamp frame (4), each lighting module (5) comprises a first lighting component (51) and a second lighting component (52), each second lighting component (52) comprises a light shielding box (5201), an LED lamp (5202) and a connecting box (5203) arranged on one side of the corresponding light shielding box (5201), the corresponding light reflecting plate (3) is matched with the corresponding lighting module (5), light emitted by each second lighting component (52) irradiates a certain area of light guide after passing through the corresponding light reflecting plate (3) to provide illumination for the corresponding area, and the controller (1) is connected with the corresponding lighting module (5);
the light reflecting plate (3) comprises a light reflecting film (301), a liquid crystal film (302), a transparent film (303), two ITO-PET films (304) and two EVA films (305), wherein two sides of the liquid crystal film (302) are connected with the ITO-PET films (304), the light reflecting film (301) and the transparent film (303) are positioned at two sides of the liquid crystal film (302), the light reflecting film (301) and the transparent film (303) are combined with the ITO-PET films (304) through the EVA films (305) respectively, and the ITO-PET films (304) are connected with the controller (1);
the lighting module (5) further comprises an angle adjusting assembly (53), the angle adjusting assembly (53) comprises an angle sensor (5301), a damping block (5302), an electromagnet three (5303), an electromagnet four (5304), a cushion block (5305) and a U-shaped conductive tube (5306), the angle sensor (5301) is arranged at the lower side of the partition plate (10), a rotating shaft (5307) is arranged at the upper part of the connecting box (5203), the upper part of the rotating shaft (5307) penetrates through the damping block (5302) to be connected with the angle sensor (5301), the electromagnet three (5303) and the electromagnet four (5304) are arranged at two sides of the rotating shaft (5307), the cushion block (5305) is arranged at one side of the electromagnet four (5304), the electromagnet four (5304) is connected with the inner side surface of the lamp frame (4) through the cushion block (5305), and the electromagnet three (5303) and the electromagnet four (5304) are respectively connected with the controller (5301);
the U-shaped conductive tube (5306) is arranged on the inner side of the rotating shaft (5307), the rotating shaft (5307) is of a hollow structure, a wire guide is formed in one side of the rotating shaft (5307), and the U-shaped conductive tube (5306) is connected with the controller (1).
2. A side entry backlight structure according to claim 1, wherein: a partition board (10) is arranged between the two lighting modules (5) in the lamp frame (4).
3. A side entry backlight structure according to claim 2, wherein: the first lighting assembly (51) comprises a first LED lamp (5101), the first LED lamp (5101) is connected with the inner wall of the lamp frame (4), a connecting shaft (5204) is arranged at the lower part of the connecting box (5203), and the lower part of the connecting shaft (5204) is rotationally connected with a corresponding partition board (10).
4. A side entry backlight structure according to claim 3, wherein: the illumination assembly II (52) further comprises a spatial filtering assembly (5205) matched with the LED lamp II (5202), the spatial filtering assembly (5205) is arranged inside the light shielding box (5201), the spatial filtering assembly (5205) comprises a mutually matched condensing objective (52051) and a pinhole (52052), the light shielding box (5201) is made of opaque materials, an opening is formed in one side of the light shielding box (5201), the pinhole (52052) is arranged in the opening, and light rays emitted by the LED lamp II (5202) are emitted out of the light shielding box (5201) after passing through the condensing objective (52051) and the pinhole (52052).
5. A side entry backlight structure as defined in claim 4, wherein: the inside of connection box (5203) is provided with permanent magnet (5206), lamp frame (4) inboard still sets up electro-magnet (11) and electro-magnet two (12), electro-magnet one (11) and electro-magnet two (12) are opposite towards shading box (5201) one side surface polarity, electro-magnet one (11) and electro-magnet two (12) are connected with controller (1) respectively.
6. A display comprising a side entry backlight structure as defined in claim 5, wherein: still include frame (6), backshell (7), liquid crystal display module (8), preceding frame (9), reflector panel (3) and backshell (7) surface connection, liquid crystal display module (8) set up between preceding frame (9) and light guide plate (2), preceding frame (9) are connected with the shell, controller (1) are connected with frame (6) outside surface, controller (1) are connected with liquid crystal display module (8).
7. A method of local backlight dimming using a display as claimed in claim 6, characterized in that: the method comprises the following specific steps:
s1, dividing a light guide plate (2) into M multiplied by N areas, wherein each area is set as Xi, and simultaneously, correspondingly dividing the liquid crystal plate into M multiplied by N areas, wherein M=m and N=n;
s2, turning off LED lamps one (5101) positioned on the upper side and the lower side of the row where the region Xi to be adjusted is positioned;
s3, turning on a plurality of LED lamps II (5202), adjusting the angles of the LED lamps II (5202), and reflecting light to the corresponding areas of the light guide plate (2) through the reflecting plate to supplement light;
s4, controlling the power-off of the reflector (3) in the corresponding area.
8. The local backlight dimming method as claimed in claim 7, wherein: in the step S2, the LED lamps one (5101) on the left and right sides of the row where the region Xi to be adjusted is located can be turned off simultaneously; in the step S3, the number of the LED lamps two (5202) may be selected according to the size of the display screen, and the corresponding area of the light guide plate (2) refers to the middle of the row or column where the area Xi to be adjusted is located.
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| JP4865082B1 (en) * | 2010-11-16 | 2012-02-01 | 株式会社東芝 | Liquid crystal display device and backlight module |
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