CN113867047B - Special-shaped backlight module and control method - Google Patents
Special-shaped backlight module and control method Download PDFInfo
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- CN113867047B CN113867047B CN202111145885.0A CN202111145885A CN113867047B CN 113867047 B CN113867047 B CN 113867047B CN 202111145885 A CN202111145885 A CN 202111145885A CN 113867047 B CN113867047 B CN 113867047B
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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
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133605—Direct backlight including specially adapted reflectors
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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
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
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- 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
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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
- G02F1/133611—Direct backlight including means for improving the brightness uniformity
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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
- G02F1/133628—Illuminating devices with cooling means
Abstract
The invention relates to the technical field of backlight sources, in particular to a special-shaped backlight source module and a control method. The LED lamp comprises a fixed frame body, a light guide plate and a cold cathode lighting unit, wherein the light guide plate comprises a light guide plate body and an LED lamp limiting mechanism, the light guide plate body is installed in the fixed frame body, an LED lamp clamping groove is formed in one side wall of the light guide plate body, and the LED lamp limiting mechanism comprises a limiting plate body; the limiting plate body is located in the LED lamp clamping groove, a lamp tube clamping groove is formed in one side wall far away from the opening, a heat dissipation frame is arranged in the lamp tube clamping groove, one side wall of the heat dissipation frame is attached to the shell of the cold cathode lighting unit, and the other side wall of the heat dissipation frame abuts against the inner wall of the other side of the limiting plate body. The invention can lead the cold cathode lighting unit to freely select the number of the cold cathode lamp bodies according to the length of the light guide plate, thereby improving the compatibility of the cold cathode lighting unit.
Description
Technical Field
The invention belongs to the technical field of backlight sources, and particularly relates to a special-shaped backlight source module and a control method.
Background
At present, because the liquid crystal display panel in the liquid crystal display device does not have a light emitting characteristic, in order to adjust the brightness of the liquid crystal display device, a backlight module for emitting light needs to be provided for the liquid crystal display panel in the liquid crystal display device. The backlight source module is mainly used for realizing light emission through the cold cathode lighting unit.
Along with social development, more and more special-shaped backlight source modules appear in the market, and the backlight source modules with curved surface structures are most representative. Traditional cold cathode fluorescent lamp can't use on the backlight module of curved surface structure because of the limitation of its self structure. This requires a freely bendable cold cathode strip to complete the illumination. However, the light bar is mostly a whole and cannot be extended or shortened, so that the light bar is difficult to be applied to backlight modules with different shapes and different angles, and the compatibility of the light bar is reduced.
Disclosure of Invention
In order to solve the problems, the invention provides a special-shaped backlight source module which comprises a fixed frame body, a light guide plate and a cold cathode lighting unit, wherein the light guide plate comprises a light guide plate body and an LED lamp limiting mechanism; the limiting plate body is positioned in the LED lamp clamping groove, a lamp tube clamping groove is formed in one side wall far away from the opening, a heat dissipation frame is arranged in the lamp tube clamping groove, one side wall of the heat dissipation frame is attached to the shell of the cold cathode lighting unit, and the other side wall of the heat dissipation frame abuts against the inner wall of the other side of the limiting plate body;
the cold cathode lighting unit comprises a plurality of groups of cold cathode lamp bodies which are sequentially connected end to end; the cold cathode lamp body comprises a cold cathode lamp shell and a lamp shell clamping mechanism, and the cold cathode lamp shell is arranged on the side wall of the light guide plate; a plurality of groups of cold cathode lamp beads are distributed on one side wall of the cold cathode lamp shell at equal intervals; the lamp shell clamping mechanisms are arranged on one side wall of the cold cathode lamp shell, which is perpendicular to the cold cathode lamp beads, and the two adjacent groups of cold cathode lamp shells are movably clamped through the lamp shell clamping mechanisms;
the light guide plate is provided with a light collecting plate, and the light collecting plate is provided with an LCD panel.
Furthermore, a reflecting plate is fixedly arranged on the inner wall of the bottom of the fixed frame body, and the light guide plate is fixedly arranged above the reflecting plate;
the light guide plate is fixedly provided with a lower diffusion plate, and the top of the lower diffusion plate is fixedly connected with the light collecting plate.
Furthermore, an upper diffusion plate is fixedly installed on the light collecting plate, and the top of the upper diffusion plate is fixedly connected with the LCD panel.
Further, a lamp housing connecting clamping groove is formed in one side wall, perpendicular to the cold cathode lamp bead, of the cold cathode lamp housing, and a lamp housing connecting clamping block is installed on one side wall, away from the lamp housing connecting clamping groove, of the cold cathode lamp housing; a spring is arranged on the inner wall of the lamp shell connecting clamping block, the other end of the spring penetrates through the outside of the lamp shell connecting clamping block, and a spring connecting plate is arranged on the other end of the spring; a lamp housing clamping block is arranged on the other side wall of the spring connecting plate; the lamp shell clamping blocks can be movably clamped in the lamp shell connecting clamping grooves on the adjacent cold cathode lamp shells.
Furthermore, the light guide plate body is installed on the reflecting plate, and a plurality of groups of light guide holes are evenly distributed on the light guide plate body.
Furthermore, a plurality of groups of lamp bead fixing grooves are formed in the inner wall of the LED lamp clamping groove at equal intervals; and the shell of the cold cathode lighting unit is movably clamped in the LED lamp clamping groove.
Furthermore, two groups of sliding grooves are symmetrically formed in the inner walls of the upper side and the lower side of the LED lamp clamping groove, and a group of sliding blocks are connected in the two groups of sliding grooves in a sliding manner; and the upper end and the lower end of the limiting plate body are fixedly connected with the two groups of sliding blocks respectively.
Furthermore, a plurality of groups of cold cathode lamp beads are respectively clamped in a group of lamp bead fixing grooves corresponding to the cold cathode lamp beads.
A control method for a special-shaped backlight source module comprises the following steps:
adjusting the length of the cold cathode lighting unit according to the length of the light guide plate, and mounting the cold cathode lighting unit on the side wall of the light guide plate;
the light guide plate, the light collecting plate and the LCD panel are sequentially arranged in the fixed frame body from bottom to top;
and switching on the power supply to ensure that the whole backlight source module starts to normally work and the control work of the backlight source module is finished.
Further, the installation work of the cold cathode lighting unit includes:
selecting the number of cold cathode lamp bodies according to the length of the light guide plate body;
clamping the lamp shell fixture blocks on one group of cold cathode lamp shells in the lamp shell connecting clamping grooves on the adjacent group of cold cathode lamp shells, and repeating the steps until all the cold cathode lamp shells are connected in sequence;
installing a plurality of groups of connected cold cathode lamp bodies in the lamp tube clamping grooves, then clamping the limiting plate body in the LED lamp clamping grooves, and clamping each group of cold cathode lamp beads in a group of bead fixing grooves corresponding to the cold cathode lamp beads;
and connecting the power lines of the cold cathode lamp bodies of all groups in series, and finishing the installation work of the cold cathode lighting unit.
The beneficial effects of the invention are:
1. the cold cathode lighting unit divides the inherent cold cathode lamp tubes or lamp strips into a plurality of groups of cold cathode lamp bodies, and the cold cathode lamp bodies of each group can be freely separated by utilizing the movable clamping relation between the lamp shell connecting clamping grooves and the lamp shell clamping blocks, and the number of the cold cathode lamp bodies can be freely selected according to the length of the light guide plate, so that the compatibility of the cold cathode lighting unit is improved. And when the cold cathode lamp body is installed, a plurality of groups of cold cathode lamp bodies which are connected are directly clamped in the lamp tube clamping grooves, and then the lamp tube clamping grooves are clamped in the LED lamp clamping grooves, so that the installation work of the cold cathode lighting unit can be completed. The installation process is fast and convenient, the cold cathode lighting unit can be protected, and the heat dissipation performance of the cold cathode lighting unit is guaranteed.
2. Through the elasticity of a plurality of groups of springs, the angle between two sets of adjacent cold cathode lamp bodies can be freely adjusted, no matter how the tortuous angle of light guide plate body is, the elasticity of all accessible springs makes each group of cold cathode lamp bodies that end to end in proper order firmly joint in the LED lamp draw-in groove. The use requirement of the cold cathode lighting unit in the special-shaped curved surface backlight source module is met.
3. After the face light source shines on the collection board body, can distribute a plurality of groups light collecting prism on collection board body upper and lower both sides face through the rectangle array and evenly gather the area source, recycle the polygon characteristic of salient piece, improve light collecting prism's light collection efficiency and light radiation efficiency for the light intensity that is used in last diffuser plate is higher, has reduced light and has broken down the rate.
4. Each group of cold cathode lamps are connected in series, when one group of cold cathode lamps breaks down, the cold cathode lamps only need to be taken down, and therefore all the cold cathode lamps do not need to be replaced, and later-stage maintenance cost is reduced.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is an exploded view of a backlight module according to an embodiment of the invention;
fig. 2 illustrates a schematic structural view of a light guide plate according to an embodiment of the present invention;
FIG. 3 is a schematic view showing the connection of a light guide plate to a cold cathode lighting unit according to an embodiment of the present invention;
FIG. 4 shows an enlarged schematic view within circle A of FIG. 3 according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an LED lamp limiting mechanism according to an embodiment of the invention;
FIG. 6 shows a left side cross-sectional schematic view of an LED lamp spacing mechanism according to an embodiment of the invention;
fig. 7 shows a schematic structural diagram of a cold cathode lighting unit according to an embodiment of the invention;
FIG. 8 is a schematic cross-sectional view showing the connection of two adjacent sets of cold cathode lamp envelopes according to an embodiment of the invention;
fig. 9 shows a schematic structural view of a light collector sheet according to an embodiment of the present invention;
fig. 10 shows a schematic left view of a light collector sheet according to an embodiment of the invention.
In the figure: 100. fixing the frame body; 110. a reflective plate; 120. a light modulation hole; 200. a light guide plate; 210. a light guide plate body; 220. a light guide hole; 230. an LED lamp clamping groove; 240. a lamp bead fixing groove; 250. the LED lamp limiting mechanism; 251. the limiting plate body; 252. a heat dissipation frame; 253. a lamp tube clamping groove; 254. a lamp tube clamping block; 255. a heat conduction hole; 260. a chute; 270. a slider; 300. a cold cathode lighting unit; 310. a cold cathode lamp envelope; 320. a cold cathode lamp bead; 330. the lamp shell is connected with the clamping groove; 340. the lamp shell is connected with the clamping block; 350. a spring connecting plate; 360. a lamp housing clamping block; 370. a spring; 400. a lower diffuser plate; 500. a light collecting plate; 510. a light collecting plate body; 520. a light-collecting prism; 600. an upper diffuser plate; 700. an LCD panel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a special-shaped backlight source module. Includes a fixing frame 100, a reflection plate 110, a light guide plate 200, a light collecting plate 500, and an LCD panel 700. For example, as shown in fig. 1, the reflection plate 110 is fixedly installed in the fixed frame 100, and a plurality of groups of light adjusting holes 120 are distributed on the reflection plate 110 in a rectangular array. The reflective plate 110 increases the light availability ratio and improves the working efficiency of the light guide plate 200 by using the principle of diffuse reflection.
The light guide plate 200 is fixedly installed in the fixing frame 100 and is located on the reflection plate 110. The light guide plate 200 serves to convert point light sources and line light sources having a limited radiation area into surface light sources, so that light transmission is more uniform.
The cold cathode lighting unit 300 is fixedly mounted on a sidewall of the light guide plate 200. The cold cathode lighting unit 300 is used to provide a light source for the module.
A lower diffuser 400 is installed on a side wall of the light guide plate 200 away from the reflective plate 110, and the lower diffuser 400 is located in the fixing frame 100. The lower diffusion plate 400 serves to uniformly diffuse the light from the light guide plate 200.
The light collecting plate 500 is installed on a sidewall of the lower diffuser plate 400 far from the light guide plate 200, and the light collecting plate 500 is located in the fixing frame 100. The light collecting plate 500 is used to concentrate the scattered light to a certain angle range for emitting, thereby improving the image or light definition.
An upper diffusion plate 600 is installed on a side wall of the light collecting plate 500 far from the lower diffusion plate 400, and the upper diffusion plate 600 is located in the fixing frame 100. The upper diffusion plate 600 serves to uniformly diffuse the light from the light collection plate 500.
The LCD panel 700 is mounted on a sidewall of the upper diffuser 600 away from the light collector plate 500, and the LCD panel 700 is located in the fixing frame 100. The LCD panel 700 serves to provide protection for components within the set frame 100.
In the embodiment of the present invention, the fixing frame 100, the reflective plate 110, the light guide plate 200, the lower diffuser plate 400, the light collecting plate 500, the upper diffuser plate 600 and the LCD panel 700 all adopt, but are not limited to, a wave-shaped curved surface structure, as shown in fig. 1. The fixing frame 100, the reflective plate 110, the light guide plate 200, the lower diffuser plate 400, the light collector plate 500, the upper diffuser plate 600, and the LCD panel 700 may also adopt other irregular plate surface structures, which are not described herein.
The light guide plate 200 includes a light guide plate body 210 and an LED lamp position limiting mechanism 250. For example, as shown in fig. 2, 3 and 4, the light guide plate body 210 is fixedly mounted on the reflection plate 110, and the light guide plate body 210 is located in the fixing frame 100. The light guide plate body 210 is evenly distributed with a plurality of groups of light guide holes 220. An LED lamp clamping groove 230 is formed in one side wall of the light guide plate body 210 in the length direction, both ends of the LED lamp clamping groove 230 are open structures, and a plurality of sets of lamp bead fixing grooves 240 are formed in the inner wall of the LED lamp clamping groove 230 at equal intervals. The housing of the cold cathode lighting unit 300 is movably clamped in the LED lamp clamping groove 230. Two sets of chutes 260 are symmetrically formed in the inner walls of the upper side and the lower side of the LED lamp clamping groove 230, and a set of sliding blocks 270 are connected in the chutes 260 in a sliding mode. The upper end and the lower end of the LED lamp limiting mechanism 250 are fixedly connected with the two groups of sliding blocks 270 respectively, and the cold cathode lighting unit 300 is movably clamped on the LED lamp limiting mechanism 250.
The LED lamp limiting mechanism 250 includes a limiting plate body 251 and a heat dissipating frame 252. For example, as shown in fig. 5 and fig. 6, the upper end and the lower end of the position limiting plate body 251 are respectively and fixedly connected to the two sets of sliders 270, a lamp slot 253 is formed in a side wall of the position limiting plate body 251, which is close to the lamp bead fixing slot 240, and the housing of the cold cathode lighting unit 300 is movably clamped in the lamp slot 253. The heat dissipation frame 252 is disposed in the lamp slot 253, and a sidewall of the heat dissipation frame 252 is attached to the housing of the cold cathode lighting unit 300, and another sidewall of the heat dissipation frame abuts against an inner wall of the limiting plate body 251 away from the lamp post fixing slot 240. A plurality of sets of heat conduction holes 255 are formed on a sidewall of the heat dissipation frame 252 away from the cold cathode lighting unit 300. A sidewall of the limiting plate body 251 away from the lamp post fixing groove 240 is an open structure. A lamp clamping block 254 is disposed at a joint between the housing of the cold cathode lighting unit 300 and the inner wall of the lamp clamping groove 253.
The housing of the cold cathode lighting unit 300 is first clamped in the lamp clamping groove 253, and then the cold cathode lighting unit 300 is clamped into the LED lamp clamping groove 230, so as to prevent the cold cathode lighting unit 300 from falling off due to shaking. The cold cathode lighting unit 300 is installed in an embedded manner, so that the overall size of the module is saved, and the cold cathode lighting unit 300 can be protected by the light guide plate 200.
The cold cathode lighting unit 300 includes a plurality of groups of cold cathode lamps connected end to end in sequence. Illustratively, as shown in fig. 7 and 8, the cold cathode lamp body includes a cold cathode lamp housing 310, and the cold cathode lamp housing 310 is movably clamped in the lamp slot 253. A plurality of groups of cold cathode lamp beads 320 are equidistantly distributed on one side wall of the cold cathode lamp shell 310, and each group of cold cathode lamp beads 320 can be movably clamped in a group of corresponding bead fixing grooves 240. A lamp housing connecting clamping groove 330 is formed in one vertical side wall of the cold cathode lamp housing 310 and the cold cathode lamp bead 320, and a lamp housing connecting clamping block 340 is fixedly mounted on one side wall of the cold cathode lamp housing 310 away from the lamp housing connecting clamping groove 330. One side wall of the lamp housing connecting clamping block 340 far away from the cold cathode lamp housing 310 is of an open structure, a plurality of groups of springs 370 are fixedly mounted on one side wall of the lamp housing connecting clamping block 340 far away from the opening, the other ends of the springs 370 penetrate through the opening to the outside of the lamp housing connecting clamping block 340, and a spring connecting plate 350 is fixedly mounted on the other side wall of the lamp housing connecting clamping block 340. A lamp housing clamping block 360 is fixedly mounted on a side wall of the spring connecting plate 350 away from the spring 370. The lamp housing fixture blocks 360 can be movably clamped in the lamp housing connecting clamp grooves 330 on the adjacent group of cold cathode lamp housings 310.
When the cold cathode lighting unit 300 is installed, the number of cold cathode lamps is selected according to the length of the light guide plate body 210, and then a plurality of groups of cold cathode lamps are sequentially connected end to end. The connection method comprises the following steps: firstly, the lamp housing fixture block 360 on one group of cold cathode lamp housings 310 is clamped in the lamp housing connecting clamping groove 330 on the adjacent group of cold cathode lamp housings 310, and so on until all cold cathode lamp housings 310 are connected in sequence. Then, several groups of connected cold cathode lamps are clamped in the lamp slot 253, and each group of cold cathode lamp beads 320 can be clamped in a corresponding group of bead fixing slots 240.
The cold cathode lamp tube or the lamp strip which is inherent in the past is divided into a plurality of groups of cold cathode lamp bodies, and the groups of cold cathode lamp bodies can be freely separated by utilizing the movable clamping relation between the lamp shell connecting clamping groove 330 and the lamp shell clamping block 360, so that the cold cathode lighting unit 300 can freely select the number of the cold cathode lamp bodies according to the length of the light guide plate 200, and the compatibility of the cold cathode lighting unit is improved. When the cold cathode lamp body is installed, the connected multiple groups of cold cathode lamp bodies are directly clamped in the lamp clamping grooves 253, and then the lamp clamping grooves 253 are clamped in the LED lamp clamping grooves 230, so that the installation work of the cold cathode lighting unit 300 can be completed. Not only the installation process is swift convenient, can also provide the protection to cold cathode lighting unit 300, has also guaranteed its thermal diffusivity. And each group of cold cathode lamp bodies are in series connection, when one group of cold cathode lamp bodies breaks down, the group of cold cathode lamp bodies only need to be taken down, and therefore, the whole cold cathode lamp bodies are not required to be replaced, and the later maintenance cost is reduced.
Through the elasticity of a plurality of groups of springs 370, the angle between two adjacent groups of cold cathode lamp bodies can be freely adjusted, and no matter how the zigzag angle of the light guide plate body 210 is, all the groups of cold cathode lamp bodies connected end to end in sequence are firmly clamped in the LED lamp clamping groove 230 through the elasticity of the springs 370. The use requirements of the cold cathode lighting unit 300 in the special-shaped curved surface backlight source module are met.
The light collector sheet 500 includes a light collector sheet body 510. For example, as shown in fig. 9 and 10, the light collecting plate body 510 is fixedly installed on the lower diffuser plate 400, and the light collecting plate body 510 is located in the fixing frame 100. A plurality of groups of convex blocks are distributed on the outer walls of the upper end and the lower end of the light collecting plate body 510 in a rectangular array manner, the convex blocks are in a polygonal structure, and light collecting prisms 520 are fixedly mounted on the outer walls of the convex blocks.
After the light source shines on the light-collecting plate body 510, can distribute a plurality of groups light-collecting prism 520 on the both sides face is even with the area source gather about the light-collecting plate body 510 through the rectangular array, recycle the polygon characteristic of salient piece, improve light collection efficiency and the light radiation efficiency of light-collecting prism 520 for the light intensity that is used in last diffuser plate 600 is higher, has reduced light and has broken down the rate.
And then the power lines of all the groups of cold cathode lamps are connected in series, and the power lines after being connected in series are electrically connected with an external power supply, so that the cold cathode lamps start to work and emit bright light. After the point light sources emitted from each set of cold cathode fluorescent lamps 320 enter the light guide plate body 210, the light sources are amplified by the high transmittance of the light guide plate body 210, and the light sources uniformly irradiate the lower diffusion plate 400 through each set of light guide holes. The point light sources are then converted into surface light sources by the lower diffusion plate 400. Later the area light source can shine on light collection board body 510, then distribute a plurality of groups light collecting prism 520 on light collection board body 510 upper and lower both sides face through the rectangular array and evenly gather the area light source, recycle the polygon characteristic of convex block, improve light collecting prism 520's light collection efficiency and light radiation efficiency for the light intensity that is used in last diffuser plate 600 is higher, has reduced light the breakage rate. Finally, the point light sources dispersed on the surface of the upper diffusion plate 600 are diffused into a surface light source, thereby realizing the overall working efficiency of the module.
On the basis of the special-shaped backlight source module, the embodiment of the invention also provides a control method of the special-shaped backlight source module. The control method comprises the following steps:
adjusting the length of the cold cathode lighting unit according to the length of the light guide plate, and mounting the cold cathode lighting unit on the side wall of the light guide plate;
the light guide plate, the light collecting plate and the LCD panel are sequentially arranged in the fixed frame body from bottom to top;
and switching on the power supply to ensure that the whole backlight source module starts to normally work and the control work of the backlight source module is finished.
Illustratively, the installation work of the cold cathode lighting unit includes:
selecting the number of cold cathode lamp bodies according to the length of the light guide plate body;
clamping the lamp shell fixture blocks on one group of cold cathode lamp shells in the lamp shell connecting clamping grooves on the adjacent group of cold cathode lamp shells, and repeating the steps until all the cold cathode lamp shells are connected in sequence;
installing a plurality of groups of connected cold cathode lamp bodies in the lamp tube clamping grooves, then clamping the limiting plate body in the LED lamp clamping grooves, and clamping each group of cold cathode lamp beads in a group of bead fixing grooves corresponding to the cold cathode lamp beads;
and connecting the power lines of the cold cathode lamp bodies of all groups in series, and finishing the installation work of the cold cathode lighting unit.
Illustratively, the operation of the backlight module comprises:
connecting each group of power lines after series connection with a power supply, and starting the power supply to enable each group of cold cathode lamps to start to emit light;
after point light sources emitted by each group of cold cathode lamp beads enter the light guide plate body, amplifying the light sources through the high light transmittance of the light guide plate body;
the light source uniformly irradiates the lower diffusion plate through each group of light guide holes, and then the point light source is converted into a surface light source through the lower diffusion plate;
then the surface light source can irradiate on the light collecting plate body, and then the surface light source is uniformly collected through a plurality of groups of light collecting prisms which are distributed on the upper side surface and the lower side surface of the light collecting plate body in a rectangular array;
the light collecting prisms on the top of the light collecting plate body convert the surface light source into a point light source with higher brightness, and finally, the point light sources dispersed on the surface of the light collecting prism are diffused into the surface light source by the upper diffusion plate, and the control step of the backlight source module is completed.
Each group of cold cathode lamps are connected in series, when one group of cold cathode lamps breaks down, the cold cathode lamps only need to be taken down, and therefore all the cold cathode lamps do not need to be replaced, and later-stage maintenance cost is reduced.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. The utility model provides a dysmorphism backlight module which characterized in that: the LED lamp comprises a fixed frame body (100), a light guide plate (200) and a cold cathode lighting unit (300), wherein the light guide plate (200) comprises a light guide plate body (210) and an LED lamp limiting mechanism (250), the light guide plate body (210) is installed in the fixed frame body (100), an LED lamp clamping groove (230) is formed in one side wall of the light guide plate body, and the LED lamp limiting mechanism (250) comprises a limiting plate body (251); the limiting plate body (251) is positioned in the LED lamp clamping groove (230), a lamp tube clamping groove (253) is formed in one side wall far away from the opening, a heat dissipation frame (253) is arranged in the lamp tube clamping groove (253), one side wall of the heat dissipation frame (253) is attached to a shell of the cold cathode lighting unit (300), and the other side wall of the heat dissipation frame is abutted to the inner wall of the other side of the limiting plate body (251);
the cold cathode lighting unit (300) comprises a plurality of groups of cold cathode lamp bodies which are sequentially connected end to end; the cold cathode lamp body comprises a cold cathode lamp shell (310) and a lamp shell clamping mechanism, and the cold cathode lamp shell (310) is arranged on the side wall of the light guide plate (200); a plurality of groups of cold cathode lamp beads (320) are distributed on one side wall of the cold cathode lamp shell (310) at equal intervals; the lamp shell clamping mechanisms are arranged on one side wall of the cold cathode lamp shell (310) perpendicular to the cold cathode lamp beads (320), and the two adjacent groups of cold cathode lamp shells (310) are movably clamped through the lamp shell clamping mechanisms; a lamp shell connecting clamping groove (330) is formed in one side wall, perpendicular to the cold cathode lamp bead (320), of the cold cathode lamp shell (310), and a lamp shell connecting clamping block (340) is arranged on one side wall, away from the lamp shell connecting clamping groove (330), of the cold cathode lamp shell (310); a spring (370) is mounted on the inner wall of the lamp shell connecting clamping block (340), the other end of the spring (370) penetrates through the outside of the lamp shell connecting clamping block (340), and a spring connecting plate (350) is mounted on the spring connecting clamping block; a lamp shell clamping block (360) is arranged on the other side wall of the spring connecting plate (350); the lamp shell clamping blocks (360) are movably clamped in the lamp shell connecting clamping grooves (330) on the adjacent groups of cold cathode lamp shells (310);
the light guide plate (200) is provided with a light collecting plate (500), and the light collecting plate (500) is provided with an LCD panel (700).
2. The profiled backlight module of claim 1, wherein: a reflecting plate (110) is fixedly arranged on the inner wall of the bottom of the fixed frame body (100), and the light guide plate (200) is fixedly arranged above the reflecting plate (110);
the light guide plate (200) is fixedly provided with a lower diffusion plate (400), and the top of the lower diffusion plate (400) is fixedly connected with the light collecting plate (500).
3. The profiled backlight module of claim 2, wherein: an upper diffusion plate (600) is fixedly installed on the light collection plate (500), and the top of the upper diffusion plate (600) is fixedly connected with the LCD panel (700).
4. The profiled backlight module of claim 2, wherein: the light guide plate is characterized in that the light guide plate body (210) is arranged on the reflecting plate (110), and a plurality of groups of light guide holes (220) are evenly distributed on the light guide plate body (210).
5. The profiled backlight module of claim 4, wherein: a plurality of groups of lamp bead fixing grooves (240) are formed in the inner wall of the LED lamp clamping groove (230) at equal intervals; the shell of the cold cathode lighting unit (300) is movably clamped in the LED lamp clamping groove (230).
6. The profiled backlight module of claim 5, wherein: two groups of sliding grooves (260) are symmetrically formed in the inner walls of the upper side and the lower side of the LED lamp clamping groove (230), and a group of sliding blocks (270) are connected in the two groups of sliding grooves (260) in a sliding mode; the upper end and the lower end of the limiting plate body (251) are fixedly connected with the two groups of sliding blocks (270) respectively.
7. The profiled backlight module according to claim 1 or 6, wherein: the cold cathode lamp beads (320) of a plurality of groups are respectively clamped in the corresponding bead fixing grooves (240).
8. The method for controlling the special-shaped backlight source module according to any one of claims 1 to 7, wherein the method comprises the following steps: the control method comprises the following steps:
adjusting the length of the cold cathode lighting unit according to the length of the light guide plate, and mounting the cold cathode lighting unit on the side wall of the light guide plate;
the light guide plate, the light collecting plate and the LCD panel are sequentially arranged in the fixed frame body from bottom to top;
and switching on the power supply to ensure that the whole backlight source module starts to normally work and the control work of the backlight source module is finished.
9. The method for controlling the profiled backlight module according to claim 8, wherein: the installation work of the cold cathode lighting unit includes:
selecting the number of cold cathode lamp bodies according to the length of the light guide plate body;
clamping the lamp shell fixture blocks on one group of cold cathode lamp shells in the lamp shell connecting clamping grooves on the adjacent group of cold cathode lamp shells, and repeating the steps until all the cold cathode lamp shells are connected in sequence;
installing a plurality of groups of connected cold cathode lamp bodies in the lamp tube clamping grooves, then clamping the limiting plate body in the LED lamp clamping grooves, and clamping each group of cold cathode lamp beads in a group of bead fixing grooves corresponding to the cold cathode lamp beads;
and connecting the power lines of all the groups of cold cathode lamps in series, and finishing the installation work of the cold cathode lighting unit.
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