CN108957853B - Backlight module and liquid crystal display device - Google Patents
Backlight module and liquid crystal display device Download PDFInfo
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- CN108957853B CN108957853B CN201810792854.6A CN201810792854A CN108957853B CN 108957853 B CN108957853 B CN 108957853B CN 201810792854 A CN201810792854 A CN 201810792854A CN 108957853 B CN108957853 B CN 108957853B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 35
- 230000007246 mechanism Effects 0.000 claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims abstract description 23
- 239000012788 optical film Substances 0.000 claims description 4
- 208000008918 voyeurism Diseases 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 15
- 230000000007 visual effect Effects 0.000 abstract description 7
- 230000001795 light effect Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 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
- G02F1/133602—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
- G02F1/1323—Arrangements for providing a switchable viewing angle
-
- 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
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Liquid Crystal (AREA)
Abstract
The utility model provides a backlight module, includes backplate and an at least group lamp strip group, every group lamp strip group is including a plurality of lamp strips, the backplate includes the bottom plate, but a plurality of lamp strips set up the top at the bottom plate relatively the bottom plate with rotating, be equipped with on every lamp strip from the driving wheel, the drive belt is around locating a plurality of follow driving wheels, backlight module still include with one of them from the pushing mechanism who is connected of driving wheel transmission, pushing mechanism orders about from the driving wheel rotation, and then drive lamp strip rotates. The backlight module can change the light-emitting angle, so that the liquid crystal display device achieves the effect of switching the wide and narrow visual angles; the rotation of the lamp strip can adjust the diameter of the driven wheel according to the light effect so as to achieve different light-emitting angles and achieve the best light-gathering effect with a narrow visual angle. The invention also relates to a liquid crystal display device.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a backlight module and a liquid crystal display device.
Background
Liquid Crystal Displays (LCDs) are not only light, thin, and small, but also have the advantages of low power consumption, no radiation, and relatively low manufacturing cost, and thus dominate the Display field. The liquid crystal display comprises a backlight module and a display panel, wherein the backlight module provides a light source for the display panel.
With the progress of science and technology, computers have become a necessity for people to work and live. People often use computers to read, learn, or communicate information during business, or other idle hours. However, due to the existence of people around, the content displayed on the computer may be peeped, so that information leakage is caused, privacy is known by others, and peeping prevention safety is poor.
In the existing peep-proof liquid crystal display, some peep-proof sheets are arranged on a display device to reduce the display visual angle, so that the privacy of a user is protected, the contrast of a large visual angle is reduced mainly by left and right light leakage of liquid crystal molecules, a narrow visual angle is realized, but the peep-proof effect is not good enough, and under certain conditions, people around the peep-proof liquid crystal display can see the content displayed on a computer easily.
Disclosure of Invention
In view of this, the present invention provides a backlight module, which can change the light-emitting angle of the backlight module, so that the display device achieves the effect of switching between wide and narrow viewing angles.
The utility model provides a backlight module, including backplate and an at least group lamp strip group, every group lamp strip group is including a plurality of lamp strips, the backplate includes the bottom plate, the top of bottom plate is located to a plurality of lamp strips, a plurality of lamp strips can set up with rotating relatively the bottom plate, be equipped with on every lamp strip from the driving wheel, the drive belt is around locating a plurality of follow driving wheels, backlight module still include with wherein at least one from the pushing mechanism who is connected of driving wheel transmission, pushing mechanism orders about from the driving wheel rotation, and then drive lamp strip rotates.
Preferably, the pushing mechanism is a gear and rack transmission mechanism, the pushing mechanism comprises a first gear and a sliding rod capable of moving up and down relative to the bottom plate, a rack is arranged on the sliding rod to be meshed with the first gear, and the first gear and one of the driven wheels are relatively fixedly arranged.
Preferably, the pushing mechanism comprises two first gears, racks are respectively arranged on two sides of the sliding rod, the two first gears are respectively meshed with the racks on two sides of the sliding rod, and a group of lamp strip groups are respectively arranged on two sides of the sliding rod.
Preferably, the driven wheel is a chain wheel, and the transmission belt is a chain; or the driven wheel is a belt pulley and the transmission belt is a belt.
Preferably, the driven wheels arranged on the lamp strips in each group of lamp strips are equal in diameter.
Preferably, the diameters of the driven wheels arranged on the light bars in each group of light bar groups gradually increase or decrease along the length direction or the width direction of the backlight module.
Preferably, the pushing mechanism is a worm gear and worm transmission mechanism, the pushing mechanism comprises a worm gear and a worm which are meshed with each other, the worm can rotate freely, and the worm gear and one of the driven wheels are fixedly arranged relatively.
Preferably, the backlight module further comprises a bearing frame and an optical diaphragm group, the bearing frame is located between the back plate and the optical diaphragm group, the bearing frame is used for bearing the optical diaphragm group, the back plate further comprises a side wall vertically and upwards extending from the bottom plate, the bottom plate and the side wall jointly enclose an accommodating space, and the light bar is arranged in the accommodating space of the back plate.
Preferably, the both ends of lamp strip all are equipped with the support frame, and the support frame is fixed on the backplate, and lamp strip movably installs on the support frame.
The invention also provides a liquid crystal display device which comprises the backlight module.
The backlight module comprises a back plate and at least one group of lamp strip groups, wherein each group of lamp strip groups comprises a plurality of lamp strips, the back plate comprises a bottom plate, the plurality of lamp strips are arranged above the bottom plate and can be rotatably arranged relative to the bottom plate, each lamp strip is provided with a driven wheel, a driving belt is wound on the plurality of driven wheels, the backlight module further comprises a pushing mechanism in transmission connection with at least one driven wheel, and the pushing mechanism drives the driven wheels to rotate so as to drive the lamp strips to rotate. The sliding rod of the backlight module can enable the light bar to rotate, so that the light emitting angle of the backlight module is changed, and the liquid crystal display device achieves the effect of switching wide and narrow visual angles; the rotation of the lamp strip can adjust the diameter of the driven wheel according to the light effect so as to achieve different light-emitting angles and achieve the best light-gathering effect with a narrow visual angle; utilize first gear, follow driving wheel, drive belt or worm gear mechanism to make the lamp strip rotate, its simple structure, convenient operation.
Drawings
Fig. 1 is a schematic structural view of a liquid crystal display device according to a first embodiment of the present invention.
Fig. 2 is a partial sectional structural view of fig. 1.
Fig. 3 is a schematic structural view of the liquid crystal display device shown in fig. 1 when switched to a narrow viewing angle.
Fig. 4 is a schematic structural view of the liquid crystal display device shown in fig. 1 when switched to a wide viewing angle.
Fig. 5 is a schematic view showing a structure in which the diameter of the driven pulley is gradually reduced along both sides of the sliding rod according to the first embodiment of the present invention.
Fig. 6 is a schematic structural view showing that the diameter of the driven wheel is gradually increased along both sides of the sliding rod according to the first embodiment of the present invention.
Fig. 7 is a schematic structural view of a liquid crystal display device according to a second embodiment of the present invention.
Fig. 8 is a schematic structural view of a liquid crystal display device according to a third embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of a liquid crystal display device according to a first embodiment of the present invention. Fig. 2 is a partial sectional structural view of fig. 1. As shown in fig. 1 and 2, the liquid crystal display device 100a includes a backlight module 10 and a display panel 20, and the backlight module 10 is disposed below the display panel 20.
Specifically, the backlight module 10 includes a back plate 13, two light bar sets 14, a carrying frame 15, an optical film set 16 and a pushing mechanism 17.
The back panel 13 includes a bottom panel 130 and a side wall 131 extending upward and vertically from the bottom panel 130, the bottom panel 130 and the side wall 131 together enclose an accommodating space, the light bar group 14 is disposed in the accommodating space of the back panel 13, that is, on the bottom panel 130, and the bearing frame 15 is mounted on the side wall 131 of the back panel.
Each light bar group comprises a plurality of light bars 140, the plurality of light bars 140 are arranged above the bottom plate 130, each light bar 140 is provided with a driven wheel 141, the driving belt 18 is wound on the plurality of driven wheels 141, namely, the plurality of driven wheels 141 are connected through the driving belt 18, the two ends of each light bar 140 are provided with supporting frames (not shown), the supporting frames are fixed on the bottom plate 130 of the back plate 13, and the light bars 140 are movably arranged on the supporting frames. In this embodiment, the driven pulley 141 is a sprocket, and the transmission belt 18 is a chain; in other embodiments, the driven pulley 141 can be a pulley, and the transmission belt 18 can be a belt, but not limited thereto.
A carrier frame 15 is mounted on top of the back plate 13 for carrying an optical membrane stack 16.
The pushing mechanism 17 is a gear and rack transmission mechanism, the gear and rack transmission mechanism includes two first gears 171 and a sliding rod 172, racks are respectively disposed on two sides of the sliding rod 172, the two first gears 171 are respectively engaged with the racks on two sides of the sliding rod 172, the two light bar groups 14 are respectively located on two sides of the sliding rod 172, and the two first gears 171 are respectively and fixedly disposed opposite to one driven wheel 141 adjacent to one light bar group 14. In the present embodiment, the two first gears 171 and the sliding bar 172 are located in the middle of the length or width of the backlight module 10, and the two first gears 171 are disposed on the adjacent light bars 140; the light bar groups 14 on the two sides of the sliding rod 172 rotate in opposite directions, the rotation directions of all the light bars 140 in each light bar group 14 are the same, that is, the light bars rotate toward the middle of the display panel 20, and a protrusion or a groove is further formed on the sliding rod 172, so that the sliding rod 172 is convenient to push. The sliding rod 172 can move up and down to drive the two first gears 171 to rotate, so as to drive the corresponding driven wheels 141 to rotate, and all the driven wheels 141 are driven to rotate under the action of the transmission belt 18, so as to drive all the light bars 140 to rotate, thereby changing the orientation of the light bars 140.
Fig. 3 is a schematic structural view of the liquid crystal display device shown in fig. 1 when switched to a narrow viewing angle. As shown in fig. 3, the working principle of the present embodiment is roughly: the sliding rod 172 moves downward and drives the two first gears 171 to rotate, and the two first gears 171 rotate in opposite directions, i.e., toward the middle of the display panel 20. Since the two first gears 171 are fixed on the light bars 140 and further drive the corresponding driven wheels 141 to rotate, the light bars 140 and the driven wheels 141 rotate simultaneously, and at this time, all the driven wheels 141 are driven to rotate under the action of the driving belt 18, so that all the light bars 140 are driven to rotate, and the orientation of the light bars 140 is changed. The light rays of the light bars 140 at the two sides of the sliding rod 172 all illuminate the middle part of the display panel 20, and the light rays at the two sides of the display panel 20 are reduced, so that the pictures at the two sides of the display panel 20 become blurred, and the narrow-view-angle peep-proof display of the liquid crystal display device 100a is realized.
Fig. 4 is a schematic structural view of the liquid crystal display device shown in fig. 1 when switched to a wide viewing angle. As shown in fig. 4, when the peep-proof mode is not required, the sliding rod 172 is reset, the light bar 140 returns to the flat illumination angle, all light rays are normally scattered, the liquid crystal display device 100a normally displays, and the wide viewing angle effect is achieved. In the embodiment, the diameters of the driven wheels 141 are all equal, so the rotation angles of all the light bars 140 are equal, and the light-emitting angles of the light rays emitted by all the light bars 140 are equal, but not limited thereto.
Fig. 5 is a schematic view showing a structure in which the diameter of the driven pulley is gradually reduced along both sides of the sliding rod according to the first embodiment of the present invention. Fig. 6 is a schematic structural view showing that the diameter of the driven wheel is gradually increased along both sides of the sliding rod according to the first embodiment of the present invention. As shown in fig. 5 and 6, the diameter of the driven wheel 141 gradually decreases or increases along the horizontal direction of the two sides of the sliding rod 172, so that the light bars 140 have different rotation angles, and the light bars 140 generate different light-emitting angles, thereby further improving the peeping-proof effect of the display panel 20.
The backlight module 10 of the embodiment rotates the light bar 140 by the up-and-down movement of the sliding rod 172, so that the light emitting angle of the backlight module 10 is changed, the liquid crystal display device 100a achieves the effect of switching between wide and narrow viewing angles, and the amount of up-and-down movement of the sliding rod 172 is adjusted to adjust the rotation angle of the light bar 140, so that light can be well concentrated in the middle of the display panel 20, and the best peep-proof effect is achieved; utilize first gear 171, follow driving wheel 141 and drive belt 18 to drive lamp strip 140 and rotate, its simple structure sets up the convenience.
Fig. 7 is a schematic structural view of a liquid crystal display device according to a second embodiment of the present invention. As shown in fig. 7, the liquid crystal display device 100b of the present embodiment has substantially the same structure as the liquid crystal display device 100a of the first embodiment, except that the positions of the sliding rod 172 and the first gear 171 of the present embodiment are different, and there is only one first gear 171, the backlight module includes only one light bar set 14, and the light bar set 14 includes a plurality of light bars 140.
Specifically, the sliding bar 172 and the first gear 171 of the present embodiment are located at one end of the backlight module 10, and all the light bars 140 are located at the same side of the sliding bar 172. Only one side of the sliding rod 172 is provided with a rack, the rack of the sliding rod 172 is meshed with the first gear 171, and the first gear 171 is fixedly arranged opposite to one adjacent driven wheel 141 in the lamp strip group. The up-and-down movement of the sliding rod 172 enables the first gear 171 to rotate, and further enables the adjacent light bars 140 to rotate, and further drives the corresponding driven wheels 141 to rotate, all the driven wheels 141 are driven to rotate under the action of the transmission belt 18, so that all the light bars 140 are driven to rotate, the orientation of the light bars 140 is changed, all the light bars 140 are driven to rotate towards the left or the right, light on one side of the display panel is reduced, and the peep-proof effect is achieved. In the present embodiment, only one set of light bars 14 is included, so the plurality of light bars 140 all have the same rotation direction.
Fig. 8 is a schematic structural view of a liquid crystal display device according to a third embodiment of the present invention. As shown in fig. 8, the liquid crystal display device 100c of the present embodiment has substantially the same structure as the liquid crystal display device 100b of the second embodiment, except that the pushing mechanism 17 of the present embodiment is a worm gear transmission mechanism.
Specifically, the worm and gear transmission mechanism includes a worm wheel 173 and a worm 174 which are engaged with each other, the worm 174 is freely rotatable, the worm wheel 173 is fixedly disposed relative to one of the driven wheels 141, all the driven wheels 141 are connected by the transmission belt 18, and the working principle of the embodiment is roughly: the worm 174 is rotated, the worm 174 rotates to drive the worm wheel 173 to rotate, the worm wheel 173 and one of the driven wheels 141 are relatively fixedly arranged, and the driven wheel 141 is fixed on the light bar 140, so that the driven wheel 141 and the light bar 140 rotate simultaneously, and all the light bars 140 can rotate towards one direction under the driving of the driving belt 18, so that the light emitting angle of the original light bar 140 is changed, and the purpose of improving the peep-proof effect is achieved. In this embodiment, the worm gear transmission mechanism can be arranged to make the light-emitting angle of the light bar 140 face the middle of the display panel 20, so as to achieve a better peep-proof effect.
The backlight module 10 of the present invention includes a back panel 13 and at least one light bar group 14, each light bar group 14 includes a plurality of light bars 140, the back panel 13 includes a bottom plate 130, the plurality of light bars 140 are disposed above the bottom plate 130, the plurality of light bars 140 are rotatably disposed relative to the bottom plate 130, each light bar 140 is provided with a driven wheel 141, the plurality of driven wheels 141 are connected by a transmission belt 18, the backlight module 10 further includes a pushing mechanism 17 in transmission connection with one of the driven wheels 141, and the pushing mechanism 17 drives the driven wheel 141 to rotate, so as to drive all the light bars 140 to rotate. The sliding rod 172 of the backlight module 10 of the invention can rotate the light bar 140, so that the light-emitting angle of the backlight module 10 is changed, and the liquid crystal display device can achieve the effect of switching between wide and narrow viewing angles; the rotation of the light bar 140 can adjust the diameter of the driven wheel 141 according to the light effect so as to achieve different light emitting angles, so as to achieve the best light gathering effect with a narrow viewing angle; the first gear 171, the driven wheel 141, the transmission belt 18 or the worm and gear mechanism are used for rotating the lamp strip 140, and the lamp strip is simple in structure and convenient to operate.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention. The various features described in the foregoing detailed description may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
Claims (8)
1. A liquid crystal display device comprises a backlight module (10) and a display panel (20), wherein the backlight module (10) is arranged below the display panel (20), the liquid crystal display device is characterized in that the backlight module (10) comprises a back plate (13) and at least one group of lamp strip groups (14), each group of lamp strip group (14) comprises a plurality of lamp strips (140), the back plate (13) comprises a bottom plate (130), the plurality of lamp strips (140) are arranged above the bottom plate (130), the plurality of lamp strips (140) can be rotatably arranged relative to the bottom plate (130), each lamp strip (140) is provided with a driven wheel (141), a transmission belt (18) is wound on the plurality of driven wheels (141), the backlight module (10) further comprises a pushing mechanism (17) in transmission connection with at least one driven wheel (141), the pushing mechanism (17) drives the driven wheel (141) to rotate, and then drives the lamp strips (140) to rotate, the pushing mechanism (17) comprises a first gear (171) and a sliding rod (172) capable of moving up and down relative to the bottom plate (130), a rack is arranged on the sliding rod (172) to be meshed with the first gear (171), the first gear (171) and one driven wheel (141) are fixedly arranged relatively, when the peeping prevention mode is adopted, the pushing mechanism (17) changes the orientation of the light bar (140), the light bar (140) illuminates the middle of the display panel (20) in a concentrated mode, the picture in the middle of the display panel (20) is clear, and the pictures on two sides of the display panel (20) are fuzzy.
2. The lcd apparatus of claim 1, wherein the pushing mechanism (17) comprises two first gears (171), two sides of the sliding rod (172a) are respectively provided with a rack, the two first gears (171) are respectively engaged with the racks on the two sides of the sliding rod (172), and two sides of the sliding rod (172) are respectively provided with a group of light bar groups (14).
3. A liquid crystal display device as claimed in claim 1, characterized in that the driven pulley (141) is a sprocket wheel and the drive belt (18) is a chain; alternatively, the driven pulley (141) is a pulley, and the transmission belt (18) is a belt.
4. The lcd apparatus of claim 1, wherein the driven wheels (141) disposed on the light bars (140) in each of the light bar groups (14) are of equal diameter.
5. The lcd apparatus of claim 1, wherein the driven wheels (141) disposed on the light bars (140) in each set of light bars (14) have diameters gradually increasing or decreasing along a length direction or a width direction of the backlight module (10).
6. A liquid crystal display device as claimed in claim 1, characterized in that the pushing mechanism (17) is a worm gear, the pushing mechanism (17) comprising a worm wheel (173) and a worm (174) which are in engagement with each other, the worm (174) being freely rotatable, the worm wheel (173) being arranged stationary relative to one of the driven wheels (141).
7. The lcd apparatus of claim 1, wherein the backlight module (10) further comprises a supporting frame (15) and an optical film set (16), the supporting frame (15) is disposed between the back plate (13) and the optical film set (16), the supporting frame (15) is used for supporting the optical film set (16), the back plate (13) further comprises a sidewall (131) vertically extending upward from the bottom plate (130), the bottom plate (130) and the sidewall (131) jointly define an accommodating space, and the light bar (140) is disposed in the accommodating space of the back plate (13).
8. The LCD device as claimed in claim 7, wherein the light bar (140) has a support frame at each end, the support frame is fixed on the back plate (13), and the light bar (140) is movably mounted on the support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810792854.6A CN108957853B (en) | 2018-07-18 | 2018-07-18 | Backlight module and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810792854.6A CN108957853B (en) | 2018-07-18 | 2018-07-18 | Backlight module and liquid crystal display device |
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| CN108957853A CN108957853A (en) | 2018-12-07 |
| CN108957853B true CN108957853B (en) | 2021-04-27 |
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| CN201810792854.6A Active CN108957853B (en) | 2018-07-18 | 2018-07-18 | Backlight module and liquid crystal display device |
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| CN116300208B (en) * | 2023-03-30 | 2024-05-03 | 惠科股份有限公司 | Backlight module, display device and driving method thereof |
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| CN117374192B (en) * | 2023-10-14 | 2024-03-26 | 东莞市触美电子科技有限公司 | Visual angle adjustable backlight module and display device |
| CN117374059B (en) * | 2023-10-14 | 2024-05-07 | 东莞市触美电子科技有限公司 | Peep-proof display device |
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