CN113514917A - Light guide plate, backlight module and display device - Google Patents
Light guide plate, backlight module and display device Download PDFInfo
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- CN113514917A CN113514917A CN202110739672.4A CN202110739672A CN113514917A CN 113514917 A CN113514917 A CN 113514917A CN 202110739672 A CN202110739672 A CN 202110739672A CN 113514917 A CN113514917 A CN 113514917A
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- 235000009537 plain noodles Nutrition 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 description 14
- 239000004973 liquid crystal related substance Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000005286 illumination Methods 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 3
- 239000000306 component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
- G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0016—Grooves, prisms, gratings, scattering particles or rough surfaces
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
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- Optics & Photonics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Planar Illumination Modules (AREA)
Abstract
The application discloses light guide plate, backlight unit and display device, the light guide plate is including going into the plain noodles, going out plain noodles and bottom surface, go into the plain noodles with go out the plain noodles with the bottom surface homonymy is adjoined, the bottom surface with it sets up relatively to go out the plain noodles, it sets up to go into the plain noodles go out the plain noodles with between the bottom surface, on going into the plain noodles, follow the light-emitting surface towards the bottom surface direction is provided with a plurality of recesses. This application promotes light utilization ratio through above mode.
Description
Technical Field
The application relates to the technical field of display, especially, relate to a light guide plate, backlight unit and display device.
Background
Liquid Crystal Displays (LCDs) are popular among users due to their mature technology, relatively low price, high brightness and power saving, and the LCD panel does not emit light and needs a light source provided by a backlight module to normally Display images, so the backlight module becomes one of the key components of the LCD device. The backlight module is to arrange the backlight source such as the light source of the light emitting diode lamp on the back plate behind the liquid crystal panel, and the light is homogenized by the diffusion plate to form the surface light source to be provided for the liquid crystal panel.
The existing backlight can be divided into a side-in type and a direct type, and the side-in type has the advantages of energy saving, light weight and low light utilization rate. As a core component of liquid crystal display, how to improve light utilization rate is a problem that needs to be solved in the field.
Disclosure of Invention
The application aims at providing a light guide plate, a backlight module and a display device to improve light utilization rate.
The application discloses light guide plate, including going into plain noodles, play plain noodles and bottom surface, go into the plain noodles with go out the plain noodles with the bottom surface homonymy is adjoint, the bottom surface with it sets up relatively to go out the plain noodles, it sets up to go into the plain noodles go out the plain noodles with between the bottom surface, go into on the plain noodles, follow the light-emitting surface towards the bottom surface direction is provided with a plurality of recesses.
Optionally, the light guide plate further includes a first side surface and a second side surface, the first side surface and the second side surface are disposed opposite to each other, the first side surface and the second side surface are respectively connected to the light incident surface, the bottom surface and the light emitting surface, and the first side surface and the second side surface are respectively located on two sides of the light incident surface; the groove is formed by recessing the light incident surface, is arranged along the direction of the first side surface extending towards the second side surface, and penetrates through the first side surface and the second side surface.
Optionally, the plurality of grooves are uniformly distributed on the light incident surface.
Optionally, a cross section of the groove in a direction from the light emitting surface to the bottom surface is a zigzag or arc shape.
Optionally, the groove includes a zigzag groove, a cross section of the zigzag groove along a direction from the light emitting surface to the bottom surface is zigzag, and an included angle between each side of the zigzag groove and a horizontal plane ranges from 35 ° to 55 °.
Optionally, a plurality of concave lens structures are arranged on the groove; the plurality of concave lens structures are inner surfaces of the grooves and are formed in an inward concave mode; the concave lens structure is arc-shaped along the cross section parallel to the light emergent surface.
Optionally, the bottom surface is provided with a plurality of scattering dots, the number of the scattering dots is gradually increased from the edge of the bottom surface to the middle, and the area of the scattering dots is gradually increased from the edge of the bottom surface to the middle; and a reflective film layer is arranged on one side of the bottom surface, which is far away from the scattering mesh points.
The application also discloses backlight unit, backlight unit includes foretell light guide plate, light source, the light source sets up the light guide plate go into one side of plain noodles.
Optionally, the opening directions of the plurality of grooves are all arranged opposite to the light source.
The application also discloses a display device, the display device includes: the light guide plate, the backlight module, the display panel, the back plate and the rear shell are arranged in the light guide plate; the display module is arranged above the back plate, and the display panel is arranged above the display module; the rear shell is used for wrapping the back plate.
This application sets up the recess through going into the plain noodles at the light guide plate to the direction of arranging of recess is followed the light-emitting face is to the bottom surface direction sets up, makes and originally has a light guide plate of leveling income plain noodles, improves to become to go into the plain noodles by the recess and form a plurality of surfaces, can make light accomplish more total reflection in the light guide plate more, and the optical density of relative vertical light incidence cross-section light guide plate obtains promoting, can make illuminance, luminance, light utilization ratio and the homogeneity of light guide plate all can obtain promoting.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1 is a schematic diagram of a display device according to an embodiment of the present application;
FIG. 2 is a schematic view of a light guide plate according to a first embodiment of the present application;
FIG. 3 is a schematic cross-sectional view of a light guide plate according to a first embodiment of the present application;
FIG. 4 is a schematic view of a light guide plate according to a second embodiment of the present application;
FIG. 5 is a schematic cross-sectional view of a light guide plate according to a third embodiment of the present application;
fig. 6 is a schematic cross-sectional view of a light guide plate according to a fourth embodiment of the present application.
10, a display device; 100. a backlight module; 110. a light guide plate; 120. a light incident surface; 121. a groove; 122. a fold-line shaped groove; 130. a concave lens structure; 140. a light-emitting surface; 150. a bottom surface; 151. scattering mesh points; 152. a reflective film layer; 160. a first side surface; 170. a second side surface; 180. a light source; 200. a display panel; 300. a back plate; 400. a rear shell.
Detailed Description
It is to be understood that the terminology, the specific structural and functional details disclosed herein are for the purpose of describing particular embodiments only, and are representative, but that the present application may be embodied in many alternate forms and should not be construed as limited to only the embodiments set forth herein.
In the description of the present application, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating relative importance or as implicitly indicating the number of technical features indicated. Thus, unless otherwise specified, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; "plurality" means two or more. The terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that one or more other features, integers, steps, operations, elements, components, and/or combinations thereof may be present or added.
Further, terms of orientation or positional relationship indicated by "center", "lateral", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are described based on the orientation or relative positional relationship shown in the drawings, are simply for convenience of description of the present application, and do not indicate that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, fixed connections, removable connections, and integral connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through both elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The present application is described in detail below with reference to the figures and alternative embodiments.
Fig. 1 is a schematic diagram of a display device according to an embodiment of the present application, and as shown in fig. 1, the present application discloses a display device 10, where the display device 10 includes: a backlight module 100, a display panel 200, a back plate 300 and a rear case 400; the display module is arranged above the backboard 300, and the display panel 200 is arranged above the display module; the rear case 400 is used to wrap the rear plate 300.
The backlight module 100, the back plate 300 and the rear shell 400 are sequentially arranged below the display panel 200, the back plate 300 is arranged below the backlight module 100 and used for supporting the backlight module 100 and the display panel 200, and the rear shell 400 is used as a shell part of the display device 10 to wrap the back plate 300, so that optical devices in the display device 10, the display panel 200, the backlight module 100 and the like are prevented from being damaged due to the influence of external factors.
The display device 10 in the present application is a backlight type liquid crystal display device 10, and the backlight module 100 of the display device 10 can be divided into a side-in type backlight module 100 and a direct type backlight module 100 according to the incident position of the light source 180, and the side-in type backlight module 100 is mainly used for illustration.
As shown in fig. 1, the present application further discloses a backlight module 100, the backlight module 100 includes a light guide plate 110 and a light source 180, and the light source 180 is disposed on one side of the light incident surface 120 of the light guide plate 110.
The backlight module 100 of the present application is to dispose the light source 180 at one side of the light guide plate 110, and the light is provided to the display panel 200 from the side through the light guide plate 110 in the backlight module 100 to form the surface light source 180.
The application is improved on backlight unit 100 to among display device 10, concrete improvement lies in light guide plate 110 among backlight unit 100, make when setting up the light source 180 of backlight unit 100 side and send the side direction light through the improvement to light guide plate 110, through light guide plate 110, light guide plate 110 can be by abundant utilization with the linear light of horizontal incidence, become the facial features light that jets out perpendicularly, provide display panel 200, can effectively promote display panel 200's backlight illumination, luminance, light utilization ratio and homogeneity, display device 10's display effect and product quality have further been promoted.
In the present application, the improvement of the light guide plate 110 is specifically as follows:
fig. 2 is a schematic view of a light guide plate according to a first embodiment of the present application, and as shown in fig. 2, the present application discloses a light guide plate 110, which includes a light incident surface 120, a light emitting surface 140, and a bottom surface 150, wherein the light incident surface 120 is adjacent to the bottom surface on the same side, the bottom surface 150 is opposite to the light emitting surface 140, the light incident surface 120 is disposed between the light emitting surface 140 and the bottom surface 150, and a plurality of grooves 121 are disposed on the light incident surface 120 along the direction from the light emitting surface 140 to the bottom surface 150.
The light incident surface 120 of the light guide plate 110 is provided with the groove 121, and the arrangement direction of the groove 121 is arranged along the direction from the light emitting surface 140 to the bottom surface 150, so that the light guide plate 110 originally provided with the flat light incident surface 120 is improved to be formed into a plurality of surfaces by the groove 121 and the light incident surface 120. In the side-in type backlight module 100, the light source 180 is located in front of the light incident surface 120 of the light guide plate 110, so when the light source 180 emits light after being powered on, the light first contacts with the grooves 121 on the light incident surface 120, the light is refracted for many times through the plurality of surfaces formed by the grooves 121, the light refraction direction is along the direction from the light emitting surface 140 to the bottom surface 150, i.e. continuously extends forward in the vertical direction, and after being continuously refracted, the light is reflected exactly toward the bottom surface 150 of the light guide plate 110, generally, a plurality of scattering dots 151 are arranged on the bottom surface 150 of the light guide plate 110, the light is reflected and adjusted through the scattering dots 151, so that the light is emitted from the light emitting surface 140 of the light guide plate 110, through the design of the light guide plate 110, more light is continuously refracted and enters the light guide plate 110, more light can be exactly refracted onto the scattering dots 151 of the bottom surface 150, just so can make more light utilized by scattering site 151, can make light accomplish more total reflection in light guide plate 110 more, be planar light guide plate for going into the plain noodles, and go into the light guide plate that the recess on the plain noodles was seted up along light guide plate width direction, a plurality of recesses 121 are seted up to bottom surface 150 direction along going out plain noodles 140 that this application provided, the optical density of light guide plate 110 who sets up a plurality of recesses 121 along light guide plate 110 thickness direction promptly obtains promoting, the light utilization efficiency is improved, the loss of light has been reduced, the display effect of display device 10 has further been promoted.
Specifically, as shown in fig. 2, the light guide plate 110 further includes a first side surface 160 and a second side surface 170, the first side surface 160 and the second side surface 170 are disposed opposite to each other, the first side surface 160 and the second side surface 170 are respectively connected to the light incident surface 120, the bottom surface 150 and the light emitting surface 140, and the first side surface 160 and the second side surface 170 are respectively located at two sides of the light incident surface 120; the grooves 121 are formed by recessing the light incident surface 120, are arranged along the direction from the first side surface 160 to the second side surface 170, and penetrate through the first side surface 160 and the second side surface 170.
In this embodiment, the grooves 121 on the light incident surface 120 of the light guide plate 110 are designed to be arranged along the direction from the first side surface 160 to the second side surface 170, and penetrate through the through grooves of the first side surface 160 and the second side surface 170, and the grooves 121 are arranged along the light emitting surface 140 to the bottom surface 150; when a light source in front of the light incident surface 120 emits light, the light firstly passes through the grooves 121 on the light incident surface 120, and is refracted for multiple times through a plurality of surfaces formed by the grooves 121, and is reflected along the light emitting surface 140 to the bottom surface 150, that is, the light is reflected back and forth from the light emitting end in the vertical direction and continuously extends forward, and then enters the inside of the light guide plate 110, and is continuously reflected and refracted at the bottom surface 150 of the light guide plate 110, and through the adjustment inside the light guide plate 110, finally, the light guide plate 110 continuously refracts and reflects the horizontally incident linear light, so that the light can be fully utilized, the light inside the light guide plate 110 is changed into the vertically emitted linear light, and the vertical linear light is emitted from the light emitting surface 140 and is provided for the display panel 200, and the backlight illumination, brightness, the light utilization rate and the uniformity of the display panel 200 can be effectively improved, the display effect and the product quality of the display device 10 are further improved.
Further, fig. 3 is a schematic cross-sectional view of a light guide plate according to a first embodiment of the present disclosure, as shown in fig. 3 and fig. 2, in order to better enable the light guide plate 110 to effectively and fully utilize light rays incident into the light guide plate 110 and achieve the purpose of improving light utilization rate, a bottom surface 150 of the light guide plate 110 in the present disclosure is provided with a plurality of scattering dots 151, the number of the plurality of scattering dots 151 gradually increases from an edge of the bottom surface 150 to a middle portion, and the area of the plurality of scattering dots 151 gradually increases from the edge of the bottom surface 150 to the middle portion; the side of the bottom surface 150 away from the scattering dots 151 is provided with a reflective film layer 152.
When light emitted from the light source 180 enters the light guide plate 110 through the grooves 121 on the light incident surface 120, since the emitted light is processed at the grooves 121 on the light incident surface 120 and is refracted for multiple times and then enters the light guide plate 110, compared with the light guide plate 110 before improvement, more light will continuously reflect to the bottom surface 150 of the light guide plate 110 in the light guide plate 110 after improvement, at this time, a plurality of scattering dots 151 are arranged on the bottom surface 150 of the light guide plate 110, the scattering dots 151 mainly function to convert linear light refracted to the bottom surface 150 into perpendicularly emergent planar light, since the light refracted to the middle part of the bottom surface 150 of the light guide plate 110 is concentrated, and the light on both sides of the bottom surface 150 of the light guide plate 110 is less, the scattering dots 151 are mainly distributed at the middle part of the bottom surface 150 of the light guide plate 110, and the number of the scattering dots 151 from both sides to the middle part is more and more concentrated, the density of the scattering net points 151 in the region where the refracted light is concentrated is improved, so that more light rays refracted from the light incident surface 120 can be received, and the situation that the light utilization rate is reduced because the light rays are not directly emitted through the scattering net points 151 is avoided; meanwhile, the areas of the scattering mesh points 151 arranged from the two sides of the bottom surface 150 to the middle are larger and larger, so that the receiving area of the scattering mesh points 151 in the region where light refraction is concentrated is enlarged, the scattering mesh points 151 can process the light refracted or reflected from the light incident surface 120 as much as possible, the light is fully utilized, the utilization rate of the light is improved, and the illumination and the brightness of the light guide plate 110 are further improved.
Moreover, while the light incident surface 120 of the light guide plate 110 is designed to have the scattering dots 151 by using the grooves 121 to cooperate with the bottom surface 150, the reflective film 152 is disposed on the side of the bottom surface 150 away from the scattering dots 151, so as to increase the range of light reflection, when light is transmitted in the light guide plate 110 and strikes the inner wall of the grooves 121, the light is reflected and continues to be transmitted inside the light guide plate 110, and more light can be totally reflected in the light guide plate 110 by using the scattering dots 151 and the reflective film 152, so that most of the light is processed by the scattering dots 151 and the reflective film 152 and then is output from the light emitting surface 140. The optical density of the light guide plate 110 and the light utilization rate of the light guide plate 110 are improved, and the display effect of the display device 10 is further improved.
Fig. 4 is a schematic view of a light guide plate according to a second embodiment of the present application, and as shown in fig. 4, the embodiment shown in fig. 4 is an improvement of the embodiment shown in fig. 2, and a plurality of grooves 121 are uniformly arranged on a light incident surface 120.
Different from the previous embodiment, in the present embodiment, each groove 121 may not be a through groove transversely penetrating the light incident surface 120, but may be a plurality of small grooves 121 or pits, and the plurality of small grooves 121 or pits may be small grooves 121 or pits formed in a manner of frosting glass on the light incident surface 120 of the light guide plate 110 or in a manner of laser, etching, or the like; the even distribution of a plurality of recesses 121 is on the income plain noodles 120 of light guide plate 110, and when the light that light source 180 sent penetrated into the income plain noodles 120, every position that has recess 121 at the income plain noodles 120 all can all be through same reflection to reach the effect of multiple reflection, like this, the light that reflects out through a plurality of recesses 121 is more even, can effectual promotion light's homogeneity.
Meanwhile, the light incident surface 120 is formed with more surfaces by the uniform arrangement of the grooves 121, such surfaces have a whole surface property, when light emitted from the light source 180 is incident on the light incident surface 120, more refraction can be formed through the grooves 121, fine adjustment of angles is performed on the incident light by using the grooves 121, the light is fully utilized and guided into the light guide plate 110, more total reflection of the light can be completed in the light guide plate 110 by matching the scattering mesh points 151 and the reflective film of the bottom surface 150, and most of the light can be output from the light emitting surface 140 after being processed by the scattering mesh points 151 and the reflective film 152. The optical density of the light guide plate 110 and the light utilization rate of the light guide plate 110 are improved. The display effect of the display device 10 is further improved.
Further, the opening directions of the plurality of grooves 121 are all arranged opposite to the position of the light source 180.
The opening orientations of the plurality of grooves 121 in this embodiment are right opposite to the light source 180, so that light emitted by the light source 180 after being electrified can just irradiate into each groove 121, and thus the light emitted by the light source 180 can be effectively received by the grooves 121, and the light leakage situation cannot occur, or part of the light is not received by the grooves 121 but is directly emitted from other edge parts. Due to the design, each groove 121 can sufficiently reflect and refract the incident light for multiple times, and the light utilization rate of the light guide plate 110 is improved.
In addition, fig. 5 is a schematic cross-sectional view of a light guide plate according to a third embodiment of the present application, and referring to fig. 5 and 3, it can be seen that a cross-section of the groove 121 along the direction from the light emitting surface 140 to the bottom surface 150 is a zigzag or arc shape, if the cross-section of the groove 121 along the direction from the light emitting surface 140 to the bottom surface 150 is a zigzag shape, an overall shape of the groove 121 may be a triangular pyramid shape, and if the cross-section of the groove 121 along the direction from the light emitting surface 140 to the bottom surface 150 is an arc shape, an overall shape of the groove 121 may be a hemispherical shape; utilize a plurality of faces that dogleg shape or arc formed to ensure that light can also realize reflection and refraction many times under the circumstances that can be fully effectual receipt, of course, the shape of recess 121 does not only confine dogleg shape or arc in this application, and other shapes are like trapezoidal, and triangle-shaped can all realize above-mentioned effect, no longer gives unnecessary details one by one here.
As shown in fig. 3, in the present application, specifically, taking the groove 121 as the zigzag groove 122 as an example, the groove 121 includes the zigzag groove 122, a cross section of the zigzag groove 122 along a direction from the light emitting surface 140 to the bottom surface 150 is zigzag, and an included angle α between each side of the zigzag groove 122 and a horizontal plane is in a range of 35 ° to 55 °.
When light rays emitted from the light source 180 positioned at the side of the light guide plate 110 enter the light incident surface 120 of the light guide plate 110, the light rays are refracted at an interface between the light incident surface 120 of the light guide plate 110 and air. If the angle of incidence of a ray is small enough, the refracted ray will be closer to the normal of incidence, which in the most extreme case can be equated with a refracted ray. At this time, if the refracted light ray happens to be totally reflected on the interface between the light incident surface 120 of the light guide plate 110 and the air, the included angle α between each side of the polygonal groove 122 and the horizontal plane ranges from 35 ° to 55 °.
Because most of the incident light is actually located at the right side of the incident normal (because the light source 180 is disposed in front of the light incident surface 120 of the light guide plate 110, most of the light emitted by the light source 180 is located at the right side of the incident normal), at this time, the refracted light deviates from the incident normal, so that the incident angle formed by the actual refracted light and the boundary of the groove 121 is greater than the total reflection critical angle formed by the incident normal and the boundary of the groove 121, that is, after any incident light is refracted into the groove 121, as long as the incident light propagates toward the interface between the groove 121 and the air, the refracted light is inevitably totally reflected and enters the light guide plate 110, and therefore, when the included angle α between each side of the zigzag-shaped groove 122 and the horizontal plane is in the range of 35 ° to 55 °, the light refraction effect is better, and the light utilization rate is higher.
In this embodiment, it is preferable that an included angle between each side of the zigzag groove 122 and the horizontal plane is 45 °, and when an included angle between each side of the zigzag groove 122 and the horizontal plane is 45 °, the refracted light beam, which is emitted from the light source 180 and enters the groove 121 and propagates toward the interface between the groove 121 and the air, is inevitably totally reflected. Can make better realization multiple reflection of light like this, promote the effect of light reflection to guaranteed that most light can both realize multiple reflection, realized recess 121 to the fine setting of light angle, improve light utilization ratio, further promoted display device 10's display effect.
Fig. 6 is a schematic cross-sectional view of a light guide plate according to a fourth embodiment of the present application, as shown in fig. 6, the embodiment shown in fig. 6 is an improvement based on fig. 2; a plurality of concave lens structures are arranged on the groove 121; the plurality of concave lens structures are inner surfaces of the grooves 121, which are formed to be concave; the concave lens structure is arc-shaped along a cross section parallel to the light exit surface 140.
In this embodiment, the concave lens structures 130 are disposed on one side of the groove 121 close to the light source 180, the concave lens structures 130 are distributed on the inner concave surface of the groove 121, when light is emitted from the light source 180, the light can first contact the concave lens structures 130, because the concave lens structures 130 change the originally smooth surface of the groove 121 into a plurality of surfaces, the light can be reflected and refracted for a plurality of times when passing through the plurality of surfaces, at this time, the concave lens structures 130 perform secondary processing on the light emitted from the light source 180 under the condition of being matched with the groove 121, so that the light emitted from the light source 180 with all angles can reach multiple refractions through the concave lens structures 130, thus not only improving the uniformity of the light emitting surface 140, but also improving the light utilization rate, and improving the display effect of the display device 10.
As shown in fig. 6, the concave lens structure 130 has an arc shape, and the center of the concave lens structure 130 is located on the arc surface of the groove 121. The arc-shaped concave lens structures 130 are uniformly arranged in a regular shape, the radius circle center of the concave lens structures 130 is arranged and falls on the curved surface of the groove 121, after the light sources 180 arranged on the lamp panel 130 in an array are powered on, the emitted light firstly passes through the concave lens structures 130 on the groove 121, because the concave lens structures 130 are arc-shaped, the light is reflected and refracted for multiple times on the arc-shaped surface of the concave lens structures 130, the groove 121 and the concave lens structures 130 carry out secondary treatment on the light, the light is guided into the light guide plate 110 through multiple times of refraction and reflection, and finally, the light guide plate 110 continuously refracts and reflects the horizontally incident linear light, so that the light can be fully utilized, the light in the light guide plate 110 is changed into the vertically emitted surface light which is diffused from the light emitting surface 140 and provided for the display panel 200, and the backlight illumination of the display panel 200 can be effectively improved, Brightness, light utilization and uniformity, further improving the display effect and product quality of the display device 10.
Further, the number of the concave lens structures 130 may also affect the refraction effect of the light in the groove 121, and when the number of the concave lens structures 130 is increased, the light emitted from the light source 180 may completely pass through the secondary processing of the concave lens structures 130, so that there is no light leakage.
In addition, the concave lens structure in the present application may be integrally formed with the groove 121, and the concave lens structure may be formed on the groove 121 of the light incident surface 120 by etching; of course, the concave lens structure and the groove 121 may also be formed separately, and the concave lens structure is adhered to the groove 121 of the light incident surface 120 by an adhesion method.
It should be noted that the inventive concept of the present application can form many embodiments, but the present application has a limited space and cannot be listed one by one, so that, on the premise of no conflict, any combination between the above-described embodiments or technical features can form a new embodiment, and after the embodiments or technical features are combined, the original technical effect will be enhanced.
The foregoing is a more detailed description of the present application in connection with specific alternative embodiments, and the specific implementations of the present application are not to be considered limited to these descriptions. For those skilled in the art to which the present application pertains, several simple deductions or substitutions may be made without departing from the concept of the present application, and all should be considered as belonging to the protection scope of the present application.
Claims (10)
1. The utility model provides a light guide plate, includes income plain noodles, goes out plain noodles and bottom surface, go into the plain noodles with go out the plain noodles with the bottom surface homonymy is adjoint, the bottom surface with go out the plain noodles and set up relatively, go into the plain noodles and set up go out the plain noodles with between the bottom surface, its characterized in that, on going into the plain noodles, follow the light-emitting surface towards the bottom surface direction is provided with a plurality of recesses.
2. The light guide plate according to claim 1, further comprising a first side surface and a second side surface, wherein the first side surface and the second side surface are disposed opposite to each other, the first side surface and the second side surface are respectively connected to the light incident surface, the bottom surface and the light emitting surface, and the first side surface and the second side surface are respectively located at two sides of the light incident surface;
the groove is formed by recessing the light incident surface, is arranged along the direction of the first side surface extending towards the second side surface, and penetrates through the first side surface and the second side surface.
3. The light guide plate according to claim 1, wherein the plurality of grooves are uniformly arranged on the light incident surface.
4. The light guide plate according to claim 2, wherein the cross section of the groove along the direction from the light emitting surface to the bottom surface is a zigzag or arc shape.
5. The light guide plate according to claim 4, wherein the groove comprises a zigzag groove, the cross section of the zigzag groove along the direction from the light emitting surface to the bottom surface is zigzag, and each edge of the zigzag groove forms an angle with a horizontal plane ranging from 35 ° to 55 °.
6. The light guide plate according to claim 1, wherein a plurality of concave lens structures are disposed on the groove; the plurality of concave lens structures are inner surfaces of the grooves and are formed in an inward concave mode; the concave lens structure is arc-shaped along the cross section parallel to the light emergent surface.
7. The light guide plate according to claim 1, wherein the bottom surface is provided with a plurality of scattering dots, the number of the scattering dots is gradually increased from the edge to the middle of the bottom surface, and the area of the scattering dots is gradually increased from the edge to the middle of the bottom surface; and a reflective film layer is arranged on one side of the bottom surface, which is far away from the scattering mesh points.
8. A backlight module, comprising the light guide plate of any one of claims 1 to 8, a light source disposed on one side of the light incident surface of the light guide plate.
9. The backlight module according to claim 8, wherein the opening directions of the plurality of grooves are all arranged opposite to the position of the light source.
10. A display device, characterized in that the display device comprises: the light guide plate according to any one of claims 1 to 7 and the backlight module, the display panel, the rear plate and the rear case according to any one of claims 8 to 9; the display module is arranged above the back plate, and the display panel is arranged above the display module; the rear shell is used for wrapping the back plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110739672.4A CN113514917A (en) | 2021-06-30 | 2021-06-30 | Light guide plate, backlight module and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110739672.4A CN113514917A (en) | 2021-06-30 | 2021-06-30 | Light guide plate, backlight module and display device |
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| CN113514917A true CN113514917A (en) | 2021-10-19 |
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| CN202110739672.4A Pending CN113514917A (en) | 2021-06-30 | 2021-06-30 | Light guide plate, backlight module and display device |
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Cited By (1)
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| CN115508940A (en) * | 2022-11-22 | 2022-12-23 | 惠科股份有限公司 | Backlight module and display device |
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Application publication date: 20211019 |