CN110967875A - Vehicle-mounted direct type backlight module and display device - Google Patents
Vehicle-mounted direct type backlight module and display device Download PDFInfo
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- CN110967875A CN110967875A CN201911423314.1A CN201911423314A CN110967875A CN 110967875 A CN110967875 A CN 110967875A CN 201911423314 A CN201911423314 A CN 201911423314A CN 110967875 A CN110967875 A CN 110967875A
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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
- G02F1/133605—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
Abstract
The invention discloses a vehicle-mounted direct type backlight module and a display device, wherein the vehicle-mounted direct type backlight module comprises a plurality of light sources, a substrate, a frame, light cups, a diffusion plate, a diffusion film, a lower light enhancement film, an upper light enhancement film, a brightness enhancement film and a light shielding film, wherein the light sources are arranged on the substrate, the light cups are arranged in the frame, the vehicle-mounted direct type backlight module also comprises a control device, the light sources are divided into a plurality of light source groups, the control device is used for controlling the light sources in the same light source group to simultaneously change brightness, each light cup is formed by enclosing a plurality of partition plates, each light cup comprises a cavity formed by enclosing the partition plates, and the light source is arranged. According to the vehicle-mounted direct type backlight module and the display device, the light sources are controlled in a grouping mode, the lamp cups surrounded by the partition plates are arranged in a matching mode, when different areas of brightness appear due to the fact that different light source groups are controlled in a grouping mode, the partition plates can block wide-angle light of light sources in a bright area from illuminating a dark area, the image sharpness of the display device is clearer, and the display effect of the display device can be improved.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle-mounted direct type backlight module and a display device.
Background
With the improvement of living standard of people, automobiles gradually enter thousands of households and become necessities of families of all levels of the society. With the advancement of science and technology, in order to more intuitively display and control various information of the vehicle, such as the speed, the oil consumption, the battery capacity, the cruising kilometer number, the navigation, the music information, the network information, the driving recording image, the transfer information and the like, various vehicle-mounted instruments are increasingly present in the vehicle, and the various vehicle-mounted instruments comprise a vehicle-mounted central control display, a vehicle-mounted driving recorder, a vehicle-mounted navigator, a vehicle-mounted driving platform integrated display screen, a vehicle-mounted streaming media rearview mirror, a vehicle seat headrest display and the like. As can be seen, the market demand for in-vehicle display devices is increasing.
In order to improve the display effect, the brightness of the display device is generally increased in the current vehicle-mounted display device. However, due to the over-high brightness, when the whole picture is a black picture, the whole picture cannot be completely black, a dark gray background color can be presented, and the feeling that the contrast is not high enough, the layering is not strong, and the picture is not real enough is provided for people; in addition, when the vehicle is driven at night, the light pollution is caused by the over-high brightness, so that the sight of a driver is disturbed, safety accidents are easily caused, and the rest of passengers in the vehicle is influenced.
Disclosure of Invention
The invention aims to provide a vehicle-mounted direct type backlight module and a display device, which enable an image of the display device to be clear and have a better display effect.
The invention provides a vehicle-mounted direct type backlight module, which comprises a plurality of light sources, a base plate, a frame, lamp cups, a diffusion plate, a diffusion film, a lower brightness enhancement film, an upper brightness enhancement film, a brightness enhancement film and a light shielding film, wherein the base plate, the frame, the diffusion plate, the diffusion film, the lower brightness enhancement film, the upper brightness enhancement film, the brightness enhancement film and the light shielding film are sequentially overlapped, the light sources are arranged on the base plate, the lamp cups are arranged in the frame, the vehicle-mounted direct type backlight module also comprises a control device, the light sources are divided into a plurality of light source groups, each light source group comprises one, two or more than two light sources, the control device is used for controlling the light sources in the same light source group to simultaneously change in brightness, each lamp cup is formed by enclosing a plurality of partition plates, each lamp cup comprises a cavity formed by enclosing the partition plates, the light source is arranged in each cavity.
In one embodiment, the plurality of light sources surround to form a plurality of annular structures, the annular structures surrounded by the light sources sequentially surround from small to large, and the distances between every two adjacent annular structures are equal; a plurality of the light sources are disposed along an edge of the substrate.
In one embodiment, the transmission axis direction of the third polarizer is perpendicular to the transmission axis direction of the fourth polarizer; and/or the transmission axis direction of the first polarizing plate is perpendicular to the transmission axis direction of the second polarizing plate.
In one embodiment, the frame includes a bottom plate and side plates, the side plates are perpendicularly disposed at edges of the bottom plate to form an accommodating cavity, the bottom plate has a plurality of openings, the light sources are exposed from the openings, and the lamp cup, the diffuser plate, the diffuser film, the lower brightness enhancement film, the upper brightness enhancement film, the brightness enhancement film and the light shielding film are all accommodated in the accommodating cavity.
In one embodiment, the side plate of the frame is further provided with a clamping block protruding towards the accommodating cavity; the side plate of the frame is also provided with heat dissipation holes, and the partition plate extends and is attached to the inner walls of the heat dissipation holes.
In one embodiment, a plurality of transverse partition plates and a plurality of longitudinally arranged partition plates are arranged at intervals in an intersecting manner to form a plurality of lamp cups, two ends of each partition plate are respectively connected to the frame, and the light sources in each cavity form one light source group.
In one embodiment, each side of each partition board facing the cavity is provided with a reflecting surface, the reflecting surfaces are inclined surfaces, so that the cavity forms a structure with a large top and a small bottom, and a certain distance is reserved between the top of the lamp cup and the bottom of the diffusion plate.
In one embodiment, the distance from the intersection point of the outermost large-angle light rays of the light sources on two sides of the same partition to the bottom of the diffusion plate is L1, and the distance from the intersection point of the outermost large-angle light rays of the light sources on two sides of the same partition to the top of the light sources is L2, then L1: L2 is substantially 2: 3; or setting the distance from the top of the light source to the top of the partition board to be L, and setting the area from the position L/2 away from the top of the light source to the top of the reflecting surface to be the reflecting area of the reflecting surface; or, setting the light emitting angle of the light source to be A, the included angle B between the reflecting surface and the horizontal direction should be less than 180-A.
In one embodiment, dots are arranged on one side of the diffusion plate facing the lamp cup, the center of the diffusion plate is the corresponding position of each light source, and the density of the dots on the diffusion plate is gradually reduced from the center to the periphery.
In one embodiment, the light shielding film is attached to the peripheral edge of the brightness enhancement film, and the light shielding film is provided with the slots.
The invention also discloses a display device, which comprises a display panel and the vehicle-mounted direct type backlight module, wherein the display panel is arranged on one side of the vehicle-mounted direct type backlight module close to the shading film, and the control device is used for controlling the brightness of the light source of each light source group according to the image signal of the display panel of the display device.
According to the vehicle-mounted direct type backlight module and the display device, the light sources are controlled in a grouping mode, the lamp cups surrounded by the partition plates are arranged in a matching mode, when different areas of brightness appear due to the fact that different light source groups are controlled in a grouping mode, the partition plates can block wide-angle light of light sources in a bright area from illuminating a dark area, the image sharpness of the display device is clearer, and the display effect of the display device can be improved.
Drawings
Fig. 1 is an exploded view of a vehicular direct-type backlight module according to an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view of the vehicle-mounted direct type backlight module shown in fig. 1.
FIG. 3 is a schematic view of light source distribution of the direct-type backlight module shown in FIG. 1.
FIG. 4 is a schematic diagram of a diffuser plate of the direct-type backlight module shown in FIG. 1.
FIG. 5 is a schematic view of a light shielding film of the direct-type backlight module shown in FIG. 1.
FIG. 6 is a partial cross-sectional view of another embodiment of the vehicle-mounted direct type backlight module shown in FIG. 1.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Referring to fig. 1 and fig. 2, a vehicle-mounted direct-type backlight module according to an embodiment of the present invention includes a plurality of light sources 11, a substrate 12, a frame 13, a lamp cup 15, a diffuser 17, a diffuser 18, a lower brightness enhancement film 19, an upper brightness enhancement film 20, a brightness enhancement film 21, and a light shielding film 23. The substrate 12, the frame 13, the diffusion plate 17, the diffusion film 18, the lower brightness enhancement film 19, the upper brightness enhancement film 20, the brightness enhancement film 21, and the light shielding film 23 are sequentially stacked, the light source 11 is disposed on the substrate 12, and the lamp cup 15 is disposed in the frame 13.
In this embodiment, the light sources 11 may be uniformly disposed on the substrate 12, so as to facilitate the uniform emission of light. Specifically, the light source 11 may be an LED (light emitting diode) lamp bead. In this embodiment, the vehicle-mounted direct-type backlight module further includes a control device (not shown), the light sources 11 are divided into a plurality of light source groups, each light source group may include one, two, or more than two light sources 11, and the control device is configured to control the light sources 11 in the same light source group to change brightness and darkness at the same time. Specifically, the control device is used for controlling the brightness of the light sources 11 of each light source group according to the image signal of the display panel of the display device. By setting the light source 11 to be in group control, the full-picture any area can dynamically follow the brightness of an image signal and automatically follow the brightness change, namely, the liquid crystal screen displays a bright scene, the backlight illumination of the corresponding area is full bright, the liquid crystal screen displays a dark scene, and the backlight illumination of the corresponding area automatically reduces the brightness or is closed, so that the bright part maintains the original high brightness, the dark part directly reduces the brightness to be close to 0, the contrast is the brightest divided by the darkest value, the ultrahigh contrast is obtained, and the display effect is good; and because the display device is not always in a full-bright state, and a plurality of areas are semi-bright or not bright, the power consumption can be greatly reduced, and the energy conservation is realized.
Referring to fig. 3, the plurality of light sources 11 surround to form a plurality of ring structures, and the ring structures surrounded by the light sources 11 sequentially surround from small to large, that is, the light sources diffuse from the center to the periphery, and the distances between every two adjacent ring structures are equal. In the present embodiment, the ring structure is rectangular, and it is understood that the ring structure may also be circular. When the ambient brightness is reduced (e.g. at night), it is usually necessary to turn the brightness of the display device down to avoid over-dazzling, which is that the control device can control to turn off one ring of light sources 11 or dim the brightness of one ring of light sources 11 every other ring. Therefore, the light emitted by all the light sources can be ensured to be more uniform.
In this embodiment, the substrate 12 may be an aluminum substrate. The substrate 12 is provided with a circuit, and each light source 11 is electrically connected to the circuit on the substrate 12 to supply power to the light source 11. The circuit of the substrate 12 is also electrically connected to the control device to control each light source 11. Specifically, a plurality of light sources 11 are arranged along the edge of the substrate 12, so that the problem of low edge brightness of the whole vehicle-mounted direct type backlight module is avoided.
In this embodiment, the frame 13 includes a bottom plate 130 and a side plate 131, the side plate 131 vertically surrounds the edge of the bottom plate 130 to form an accommodating cavity, the bottom plate 130 is provided with a plurality of openings 132, and the plurality of light sources 11 are exposed from the openings 132 to emit light to the upper side of the frame 13. The frame 13 may be a rubber frame or an iron frame. The lamp cup 15, the diffusion plate 17, the diffusion film 18, the lower brightness enhancement film 19, the upper brightness enhancement film 20, the brightness enhancement film 21 and the light shielding film 23 can be accommodated in the accommodating cavity. Specifically, the frame 13 may be attached to the substrate 12 by a double-sided tape. The side plates 131 of the frame 13 are further provided with latch blocks 134 protruding toward the accommodating cavity, so that the lamp cup 15, the diffusion plate 17, the diffusion film 18, the lower brightness enhancement film 19, the upper brightness enhancement film 20, the brightness enhancement film 21 and the light shielding film 23 are prevented from being separated from the frame 13.
In this embodiment, each lamp cup 15 is surrounded by a plurality of partition plates 152, each lamp cup 15 includes a cavity 154 surrounded by the partition plates 152, and the opening 132 is disposed corresponding to the position of the cavity 154, so that the light source 11 is exposed to the cavity 154. Specifically, each cavity 154 is correspondingly provided with a plurality of openings 132, that is, a plurality of light sources 11 are arranged in each cavity 154; it will be appreciated that in other embodiments, such as that shown in FIG. 2, only one light source 11 may be disposed within each cavity 154. Specifically, a plurality of transverse partitions 152 and a plurality of longitudinally disposed partitions 152 are alternately arranged to intersect to form a plurality of lamp cups 15, and both ends of each partition 152 are respectively connected to the frame 13. Due to the arrangement of the lamp cup 15, when the brightness of different light source groups is controlled in a grouping manner and different areas with different brightness appear, the partition plate 152 can block the large-angle light of the light source 11 in the bright area to illuminate the dark area, so that the image sharpness of the display device is clearer, and the display effect can be improved. Specifically, the light sources 11 in each cavity 154 are grouped into a group of light sources, thereby avoiding light crosstalk of the light sources 11 in the same cavity 154 due to the absence of the barrier of the partition 152.
Each partition 152 has a reflective surface 156 on a side facing the cavity 154, and the reflective surface 156 is a slope surface so that the cavity 154 has a structure with a large top and a small bottom. The inclined reflective surface 156 can reflect the light emitted from the light source 11, so that the light of the adjacent light sources 11 is mixed, and the light is more uniform, as shown in fig. 2, the light t1 with large angle at the outermost side of the light source 11 is reflected by the reflective surface 156 and then emitted as the emergent light t2, and then is intersected and mixed with the emergent light t2 of the adjacent light source 11. Further, the top of the lamp cup 15 is spaced from the bottom of the diffusion plate 17, so that the light emitted from the light sources 11 on both sides of the same partition 152 can be mixed after intersecting, and the light is more uniform. Specifically, the distance from the intersection point of the outermost large-angle light rays of the light sources 11 on both sides of the same partition 152 to the bottom of the diffusion plate 17 is L1, the distance from the intersection point of the outermost large-angle light rays of the light sources 11 on both sides of the same partition 152 to the top of the light sources 11 is L2, and the ratio of L1 to L2 is about 2: 3. Specifically, the distance from the top of the light source 11 to the top of the partition 152 is set to L, and the area of the reflective surface 156 from the top L/2 of the light source 11 to the top of the reflective surface 156 is set to be the reflective area of the reflective surface 156 for reflecting the light of the light source 11 adjacent to the reflective surface 156, that is, the reflective surface 156 of the reflective surface 156 below the top L/2 of the light source 11 does not reflect the light, so that the brightness of the light mixing area between two adjacent light sources 11 is close to the brightness of the direct projection area of the light source 11, the light is uniform, and the display effect of the display device is uniform. The light emitting angle of the light source 11 is set to be a, and in order to ensure the light mixing area, the included angle B between the reflecting surface 156 and the horizontal direction should be smaller than 180 ° -a.
Specifically, in the present embodiment, the light emitting angle of the light source 11 is 120 °, the spacing S2 between adjacent light sources 11 is 7.61mm, the width S1 of the partition 152 is 5.21mm, the L1 is 2.16mm, and the L2 is 3.06 mm.
In another embodiment, the side plate 131 of the frame 13 may further have heat dissipation holes (not shown), and the partition 152 extends and is attached to the inner walls of the heat dissipation holes. Therefore, heat generated by the light source 11 is radiated to the partition plate 152, the partition plate 152 can radiate the heat from the radiating holes, the temperature of the vehicle-mounted direct type backlight module is reduced, the working environment of each optical film is improved, the condition of thermal expansion deformation caused by high temperature is further improved, and the display effect of the display device is improved.
In this embodiment, as shown in fig. 4, the dots 172 are disposed on one side of the diffuser 17 facing the lamp cup 15, and the density of the dots 172 on the diffuser 17 decreases gradually from the center to the periphery with the corresponding position of each light source 11 as the center. Through setting up the site 172, can further help diffuser plate 17 to break up the light of the direct light of light source 11, make the lamp cup 15 correspond regional luminance more even, cooperate the reflection of the plane of reflection 156 of lamp cup 15 to act on, can be better prevent that light cluster from reaching adjacent region, make holistic display effect more even, the demonstration contrast during regional illumination is also higher.
In this embodiment, the light shielding film 23 is attached to the peripheral edge of the brightness enhancement film 21 to shield the edge of the vehicle-mounted direct-type backlight module, thereby preventing light leakage of the vehicle-mounted direct-type backlight module. Specifically, the light shielding film 23 is a ring-shaped structure.
As shown in fig. 5, the light shielding film 23 may have a slot 232, so that heat generated by the light source 11 of the on-board direct-type backlight module is dissipated through the slot 232, the temperature of the on-board direct-type backlight module is reduced, the working environment of each optical film is improved, the thermal expansion deformation caused by high temperature is improved, and the display effect of the display device is improved.
In this embodiment, as shown in fig. 6, in another embodiment, the on-vehicle direct-type backlight module further includes a reflective plate 25, and the reflective plate 25 is disposed on a side of the substrate 12 where the light source 11 is disposed. The reflector 25 is used to reflect part of the light upward, so that on one hand, all the light is fully utilized to improve the brightness, and on the other hand, the light is further uniform. Further, the reflection plate 25 may include a plurality of inclined surfaces inclined toward the adjacent reflection surface 156 to reflect light toward the reflection surface 156.
The present invention further provides a display device, which comprises a display panel (not shown) and the above-mentioned vehicle-mounted direct type backlight module, wherein the display panel is disposed on one side of the vehicle-mounted direct type backlight module close to the shading film 23. Specifically, the display panel may be a liquid crystal display panel.
In the vehicle-mounted direct type backlight module and the display device, the light sources 11 are controlled in groups, and the lamp cups 15 surrounded by the partition plates 152 are arranged in a matched mode, so that when the brightness of different light source groups is controlled in groups and areas with different brightness appear, the partition plates 152 can block large-angle light of the light sources 11 in a bright area from illuminating a dark area, the image sharpness of the display device is clearer, and the display effect of the display device can be improved.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The vehicle-mounted direct type backlight module is characterized by comprising a plurality of light sources (11), a substrate (12), a frame (13), a lamp cup (15), a diffusion plate (17), a diffusion film (18), a lower brightness enhancement film (19), an upper brightness enhancement film (20), a brightness enhancement film (21) and a light shielding film (23), wherein the substrate (12), the frame (13), the diffusion plate (17), the diffusion film (18), the lower brightness enhancement film (19), the upper brightness enhancement film (20), the brightness enhancement film (21) and the light shielding film (23) are sequentially stacked, the light sources (11) are arranged on the substrate (12), the lamp cup (15) is arranged in the frame (13), the vehicle-mounted direct type backlight module further comprises a control device, the light sources (11) are divided into a plurality of light source groups, each light source group comprises one, two or more than two light sources (11), the control device is used for controlling the light sources (11) in the same light source group to change in brightness at the same time, each lamp cup (15) is formed by surrounding a plurality of partition plates (152), each lamp cup (15) comprises a cavity (154) surrounded by the partition plates (152), and the light sources (11) are arranged in each cavity (154).
2. The vehicular direct type backlight module according to claim 1, wherein a plurality of the light sources (11) enclose a plurality of ring-shaped structures, and the ring-shaped structures enclosed by the light sources (11) are sequentially surrounded from small to large, and distances between every two adjacent ring-shaped structures are equal; a plurality of the light sources (11) are provided along an edge of the base plate (12).
3. The vehicular direct type backlight module according to claim 1, wherein the frame (13) includes a bottom plate (130) and side plates (131), the side plates (131) are vertically disposed around an edge of the bottom plate (130) to define a receiving cavity, the bottom plate (130) has a plurality of openings (132), the light sources (11) are exposed from the openings (132), and the lamp cup (15), the diffuser plate (17), the diffuser film (18), the bottom light-adding film (19), the top light-adding film (20), the brightness-increasing film (21), and the light-shielding film (23) are all received in the receiving cavity.
4. The vehicular direct type backlight module according to claim 3, wherein the side plate (131) of the frame (13) is further provided with a latch (134) protruding toward the receiving cavity; the side plates (131) of the frame (13) are also provided with heat dissipation holes, and the partition plates (152) extend and are attached to the inner walls of the heat dissipation holes.
5. The vehicular direct type backlight module according to claim 1, wherein a plurality of transverse partitions (152) and a plurality of longitudinal partitions (152) are arranged in a crossed manner at intervals to form a plurality of the lamp cups (15), two ends of each partition (152) are respectively connected to the frame (13), and the light sources (11) in each cavity (154) form one light source group.
6. The vehicular direct type backlight module according to claim 1, wherein each of the partitions (152) has a reflective surface (156) on a side facing the cavity (154), and the reflective surface (156) is a slope surface such that the cavity (154) has a structure with a large top and a small bottom, and a distance is provided between a top of the lamp cup (15) and a bottom of the diffuser plate (17).
7. The vehicular direct type backlight module according to claim 6, wherein a distance from an intersection point of outermost large-angle light rays of the light sources (11) on both sides of the same partition (152) to a bottom of the diffuser plate (17) is L1, and a distance from an intersection point of outermost large-angle light rays of the light sources (11) on both sides of the same partition (152) to a top of the light sources (11) is L2, then L1: l2 is substantially 2: 3; or setting the distance from the top of the light source (11) to the top of the partition (152) to be L, and setting the area of the reflecting surface (156) from the position L/2 of the top of the light source (11) to the top of the reflecting surface (156) to be the reflecting area of the reflecting surface (156); or setting the light emitting angle of the light source (11) to be A, the included angle B between the reflecting surface (156) and the horizontal direction should be less than 180-A.
8. The vehicular direct type backlight module according to claim 1, wherein a side of the diffuser plate (17) facing the lamp cup (15) is provided with dots (172), and a density of the dots (172) on the diffuser plate (17) decreases gradually from center to periphery with a center corresponding to each light source (11).
9. The vehicular direct type backlight module according to claim 1, wherein the light shielding film (23) is attached to the peripheral edge of the brightness enhancement film (21), and the light shielding film (23) is provided with the slots (232).
10. A display device comprising a display panel and a direct backlight module as claimed in any one of claims 1 to 9, wherein the display panel is disposed on a side of the direct backlight module adjacent to the light shielding film (23), and the control device is configured to control the brightness of the light source (11) of each light source group according to an image signal of the display panel of the display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911423314.1A CN110967875A (en) | 2019-12-30 | 2019-12-30 | Vehicle-mounted direct type backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911423314.1A CN110967875A (en) | 2019-12-30 | 2019-12-30 | Vehicle-mounted direct type backlight module and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110967875A true CN110967875A (en) | 2020-04-07 |
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| CN201911423314.1A Pending CN110967875A (en) | 2019-12-30 | 2019-12-30 | Vehicle-mounted direct type backlight module and display device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759605A (en) * | 2021-09-10 | 2021-12-07 | 昆山龙腾光电股份有限公司 | Backlight module and display device thereof |
| CN114187838A (en) * | 2021-12-14 | 2022-03-15 | 深圳市瀚达美电子有限公司 | Direct type energy-saving vehicle-mounted backlight module with active driving device and driving method |
| CN114566092A (en) * | 2022-03-10 | 2022-05-31 | 武汉华星光电技术有限公司 | Backlight module and display device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040024955A (en) * | 2002-09-18 | 2004-03-24 | 주식회사 송산 | Light diffusing plate |
| CN201093370Y (en) * | 2007-07-05 | 2008-07-30 | 上海三思电子工程有限公司 | LED non-homogeneous placement structure of LED array light source for lighting |
| CN102798043A (en) * | 2012-08-02 | 2012-11-28 | 青岛海信电器股份有限公司 | Direct-lighting type backlight module |
| CN203115912U (en) * | 2013-01-07 | 2013-08-07 | 厦门华联电子有限公司 | Heat radiation structure of array LED light source panel |
| CN203731289U (en) * | 2013-12-31 | 2014-07-23 | 京东方光科技有限公司 | LED lamp strips, backlight module and display device |
| CN204554536U (en) * | 2015-04-16 | 2015-08-12 | 深圳Tcl新技术有限公司 | Down straight aphototropism mode set and liquid crystal indicator |
| CN105242455A (en) * | 2015-10-27 | 2016-01-13 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN107869672A (en) * | 2017-10-18 | 2018-04-03 | 安徽芯瑞达科技股份有限公司 | Down straight aphototropism mode set based on compound reflecting bowl |
| CN208172454U (en) * | 2018-05-18 | 2018-11-30 | 深圳市瀚达美电子有限公司 | A kind of backlight module and the backlight module for automobile display screen |
| CN211403042U (en) * | 2019-12-30 | 2020-09-01 | 深圳市瀚达美电子有限公司 | Vehicle-mounted direct type backlight module and display device |
-
2019
- 2019-12-30 CN CN201911423314.1A patent/CN110967875A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040024955A (en) * | 2002-09-18 | 2004-03-24 | 주식회사 송산 | Light diffusing plate |
| CN201093370Y (en) * | 2007-07-05 | 2008-07-30 | 上海三思电子工程有限公司 | LED non-homogeneous placement structure of LED array light source for lighting |
| CN102798043A (en) * | 2012-08-02 | 2012-11-28 | 青岛海信电器股份有限公司 | Direct-lighting type backlight module |
| CN203115912U (en) * | 2013-01-07 | 2013-08-07 | 厦门华联电子有限公司 | Heat radiation structure of array LED light source panel |
| CN203731289U (en) * | 2013-12-31 | 2014-07-23 | 京东方光科技有限公司 | LED lamp strips, backlight module and display device |
| CN204554536U (en) * | 2015-04-16 | 2015-08-12 | 深圳Tcl新技术有限公司 | Down straight aphototropism mode set and liquid crystal indicator |
| CN105242455A (en) * | 2015-10-27 | 2016-01-13 | 深圳市华星光电技术有限公司 | Backlight module and display device |
| CN107869672A (en) * | 2017-10-18 | 2018-04-03 | 安徽芯瑞达科技股份有限公司 | Down straight aphototropism mode set based on compound reflecting bowl |
| CN208172454U (en) * | 2018-05-18 | 2018-11-30 | 深圳市瀚达美电子有限公司 | A kind of backlight module and the backlight module for automobile display screen |
| CN211403042U (en) * | 2019-12-30 | 2020-09-01 | 深圳市瀚达美电子有限公司 | Vehicle-mounted direct type backlight module and display device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113759605A (en) * | 2021-09-10 | 2021-12-07 | 昆山龙腾光电股份有限公司 | Backlight module and display device thereof |
| CN113759605B (en) * | 2021-09-10 | 2023-07-25 | 昆山龙腾光电股份有限公司 | Backlight module and display device thereof |
| CN114187838A (en) * | 2021-12-14 | 2022-03-15 | 深圳市瀚达美电子有限公司 | Direct type energy-saving vehicle-mounted backlight module with active driving device and driving method |
| CN114187838B (en) * | 2021-12-14 | 2022-07-15 | 深圳市瀚达美电子有限公司 | Direct type energy-saving vehicle-mounted backlight module with active driving device and driving method |
| CN114566092A (en) * | 2022-03-10 | 2022-05-31 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN114566092B (en) * | 2022-03-10 | 2024-03-08 | 武汉华星光电技术有限公司 | Backlight module and display device |
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