CN111474624A - Backlight structure and L CD display module - Google Patents
Backlight structure and L CD display module Download PDFInfo
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- CN111474624A CN111474624A CN202010460358.8A CN202010460358A CN111474624A CN 111474624 A CN111474624 A CN 111474624A CN 202010460358 A CN202010460358 A CN 202010460358A CN 111474624 A CN111474624 A CN 111474624A
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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
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
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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
- G02B6/0066—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 characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Abstract
The invention discloses a backlight structure and an L CD display module, the backlight structure comprises a light guide plate, a plurality of light sources, a first prism sheet, a second prism sheet and a third prism sheet, wherein the first prism sheet is stacked and spaced apart from the light guide plate, the first prism sheet comprises a first substrate and a plurality of first bulges, the second prism sheet is stacked and spaced apart from the first prism sheet, the second prism sheet is positioned on one side of the first prism sheet, which is far away from the light guide plate, the second prism sheet comprises a second substrate and a plurality of second bulges, and a haze layer is arranged on the surface, which is close to the first prism sheet, of the second substrate.
Description
Technical Field
The invention relates to the technical field of L CD display modules, in particular to a backlight structure and a L CD display module.
Background
In the related art, the directional backlight has advantages of adjustable brightness viewing angle and forward brightness, and is increasingly applied to high-brightness display on vehicle, anti-peeping display of notebook computers, and high-brightness display of VR (Virtual Reality technology) in recent years, the inverse prism and the matched L GP (light guide plate) are the most commonly used directional backlight schemes, and often homogenize light by introducing haze and play a role in shielding bad and flaw surfaces of film materials.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a backlight structure which can effectively improve the granular sensation phenomenon of a haze layer after being amplified by an optical system.
The invention further provides an L CD display module, and the L CD display module comprises the backlight structure.
The backlight structure according to the embodiment of the invention comprises: a light guide plate; the light sources are arranged on the side face of the light guide plate and distributed at intervals along the length direction of the corresponding side wall of the light guide plate; the first prism sheet is stacked and spaced apart from the light guide plate, and comprises a first substrate and a plurality of first protrusions, the first protrusions are arranged on one side, far away from the light guide plate, of the first substrate, each first protrusion extends along the arrangement direction of the light sources, and the arrangement direction of the first protrusions is perpendicular to the extension direction of the first protrusions; the second prism sheet and the first prism sheet are arranged in a stacked mode and spaced apart, the second prism sheet is located on one side, far away from the light guide plate, of the first prism sheet, the second prism sheet comprises a second substrate and a plurality of second protrusions, the second protrusions are arranged on one side, far away from the first prism sheet, of the second substrate, the extending direction of each second protrusion is the same as that of the first protrusion, the arrangement direction of the second protrusions is the same as that of the first protrusions, and a haze layer is arranged on the surface, close to the first prism sheet, of the second substrate.
According to the backlight structure provided by the embodiment of the invention, the haze layer is arranged on one side of the second prism sheet close to the first prism sheet, and the haze layer can be positioned on one side of the second prism sheet far away from human eyes, so that the light is better dispersed after passing through the haze layer, the granular sensation phenomenon of the haze layer after being amplified by the optical system can be effectively improved, and the picture quality is improved. In addition, the second protrusions on the second prism sheet are positioned on one side of the second substrate far away from the first prism sheet, so that the arrangement of the haze layer is convenient, the final emergent angle of light can meet the requirement by arranging the first prism sheet and the second prism sheet, and the structure is simple.
According to some embodiments of the invention, the first substrate has a thickness d1, the second substrate has a thickness d2, d1 ≧ 65 μm, and d2 ≧ 65 μm.
In some embodiments of the present invention, d1+ d2 ≦ 250 μm.
In some embodiments of the invention, the thickness of the first substrate and the thickness of the second substrate satisfy: d1 ═ d 2.
According to some embodiments of the present invention, the first protrusions have a triangular cross-section and have one side on a surface of the first substrate away from the light guide plate, and the second protrusions have a triangular cross-section and have one side on a surface of the second substrate away from the first prism sheet.
In some embodiments of the present invention, the first protrusion includes a first surface close to the light source and a second surface far from the light source, the second protrusion includes a third surface close to the light source and a fourth surface far from the light source, the light emitted from the light guide plate enters the first prism sheet, then exits from the second surface and enters the second prism sheet, and then exits from the fourth surface, the first surface has an angle β with the first substrate, the second surface has an angle α with the first substrate, the third surface has an angle α 1 with the second substrate, the third surface has an angle α with the second substrate, the light entering the first prism sheet has an incident angle θ 2, the corresponding refraction angle θ 3, the light exiting angle of the first prism sheet is θ 4, the corresponding refraction angle is θ 5, the light entering the second prism sheet has an incident angle θ 6, the corresponding refraction angle θ 7, the light exiting angle of the second prism sheet is θ 8, the corresponding refraction angle θ 5, the distance between the adjacent first edge and the second edge 82 is set as the set value, and the distance between the first edge is set value 367, the distance between the first edge and the adjacent second edge 82 is set as the distance between the first distance between the second edge.
In some embodiments of the invention, the first set value is 24 μm.
In some embodiments of the present invention, the second predetermined value is 16 to 18 μm.
In some embodiments of the invention, the β is 90 ° - θ 3.
In some embodiments of the invention, the α 1 is 90-theta 7.
In some embodiments of the present invention, the haze layer has a haze of 20% to 40%.
In some embodiments of the invention, the light source is an L ED lamp.
The L CD display module according to the embodiment of the invention comprises the backlight structure.
According to the L CD display module of the embodiment of the invention, the haze layer is arranged on one side of the second prism sheet close to the first prism sheet, so that the haze layer can be arranged on one side of the second prism sheet far away from human eyes, the light is better dispersed after passing through the haze layer, the granular sensation phenomenon of the haze layer after being amplified by an optical system can be effectively improved, and the picture quality is improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a perspective view of a backlight structure according to an embodiment of the invention;
FIG. 2 is a front view of a backlight configuration according to an embodiment of the invention;
fig. 3 is a partial structural schematic view of a first prism sheet of a backlight structure according to an embodiment of the present invention;
fig. 4 is a partial structural schematic view of a second prism sheet of a backlight structure according to an embodiment of the present invention;
FIG. 5 is a front view and a light path diagram of a backlight structure according to an embodiment of the invention;
fig. 6 is a front view and a multi-path view of a backlight structure according to an embodiment of the present invention.
FIG. 7 is a schematic diagram of light rays emitted from a light guide plate of a backlight structure according to an embodiment of the invention;
FIG. 8 is a schematic diagram of light emitted from the first prism sheet of the backlight structure according to the embodiment of the invention;
fig. 9 is a schematic diagram of light emitted from the second prism sheet of the backlight structure according to the embodiment of the invention.
Reference numerals:
the backlight structure 100 is provided with a backlight structure,
a light guide plate (1) is provided,
the light source (2) is arranged in a plane,
the first prism sheet 3, the first substrate 31, the first protrusions 32, the first surface 321, the second surface 322, the first ridge 323,
a second prism sheet 4, a second substrate 41, second protrusions 42, a third surface 421, a fourth surface 422, second ridges 423,
a haze layer 5.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "length", "height", "upper", "lower", "front", "rear", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
A backlight structure 100 according to an embodiment of the invention is described below with reference to fig. 1-6.
As shown in fig. 1 and 2, the backlight structure 100 according to an embodiment of the present invention includes a light guide plate 1, a plurality of light sources 2, a first prism sheet 3, and a second prism sheet 4.
Specifically, as shown in fig. 1 and 2, the plurality of light sources 2 are disposed on the side surface of the light guide plate 1 and are spaced apart along the longitudinal direction of the corresponding side wall of the light guide plate 1, for example, in the example shown in fig. 1, the plurality of light sources 2 are disposed on the left side of the light guide plate 1 and are spaced apart along the longitudinal direction (the front-rear direction shown in fig. 1) of the left side wall of the light guide plate 1. Light rays from the plurality of light sources 2 are incident into the light guide plate 1 from the respective side walls of the light guide plate 1, and the light rays are uniformly emitted from the front surface, as shown in fig. 1, of the light guide plate 1 by the light guide plate 1.
The first prism sheet 3 is stacked and spaced apart from the light guide plate 1, the first prism sheet 3 includes a first substrate 31 and a plurality of first protrusions 32, the plurality of first protrusions 32 are disposed on one side of the first substrate 31 away from the light guide plate 1, each first protrusion 32 extends along the arrangement direction of the plurality of light sources 2, the arrangement direction of the plurality of first protrusions 32 is perpendicular to the extension direction of the first protrusion 32, and the first prism sheet 3 can deflect the light emitted from the light guide plate 1 to a direction perpendicular to the light guide plate 1 by a certain angle. The second prism sheet 4 is stacked and spaced apart from the first prism sheet 3, the second prism sheet 4 is located on one side of the first prism sheet 3 away from the light guide plate 1, the second prism sheet 4 includes a second substrate 41 and a plurality of second protrusions 42, the plurality of second protrusions 42 are disposed on one side of the second substrate 41 away from the first prism sheet 3, an extending direction of each second protrusion 42 is the same as that of the first protrusion 32, an arrangement direction of the plurality of second protrusions 42 is the same as that of the plurality of first protrusions 32, and the second prism sheet 4 can deflect light emitted from the first prism sheet 3 according to a required light direction.
As shown in fig. 1, the surface of the second substrate 41 close to the first prism sheet 3 is provided with the haze layer 5, so that the haze layer 5 is located on the side of the second prism sheet 4 far away from the eyes, and the light is less diverged on a fixed receiving surface relative to the haze layer 5 located on the eye-near side. Therefore, the phenomenon that the light homogenization is insufficient at the near-eye side of the conventional inverse prism haze layer, and the light approaches the profile of the light after passing through the amplifying system, so that the particle roughness of the image quality is caused can be avoided. The haze layer 5 is far away from the human eye side, and the degree of light rays dispersed after passing through the haze layer 5 is good in homogenization effect.
Wherein, the light guide plate 1, the first substrate 31 and the second substrate 32 may be disposed in parallel.
According to the backlight structure 100 of the embodiment of the invention, the haze layer 5 is arranged on the side of the second prism sheet 4 close to the first prism sheet 3, so that the haze layer 5 is arranged on the side of the second prism sheet 4 far away from human eyes, and thus the light is dispersed better after passing through the haze layer 5, the granular sensation phenomenon of the haze layer 5 after being amplified by an optical system can be effectively improved, and the picture quality is improved. In addition, the second protrusions 42 on the second prism sheet 4 are located on the side of the second substrate 41 away from the first prism sheet 3, which facilitates the arrangement of the haze layer 5, and the final emitting angle of light can meet the requirement by arranging the two prism sheets of the first prism sheet 3 and the second prism sheet 4, and the structure is simple.
In some embodiments of the present invention, as shown in FIG. 2, the first substrate 31 has a thickness d1, the second substrate 41 has a thickness d2, d1 ≧ 65 μm, and d2 ≧ 65 μm. Therefore, the light can be deflected better, and the requirement of the light-emitting angle of the backlight structure 100 is met.
Furthermore, d1+ d2 is less than or equal to 250 μm in the related art, L CD for VR is the resolution level of the mainstream, and the thickness of the inverse prism substrate is generally 250um so as not to cause moire patterns visible under a magnifying glass of 10 times.
Alternatively, the thickness of the first substrate 31 and the thickness of the second substrate 41 satisfy: d1 ═ d 2. Therefore, the processing technology of the first substrate 31 and the second substrate 41 can be simplified, and the production efficiency can be improved. Of course, the present invention is not limited thereto, and the thickness of the first substrate 31 and the thickness of the second substrate 41 may also be different, for example, the thickness of the first substrate 31 is greater than the thickness of the second substrate 41, or the thickness of the first substrate 31 is less than the thickness of the second substrate 41.
In some embodiments of the present invention, as shown in fig. 1 and 2, the first protrusions 32 have a triangular cross-section and have one side on the surface of the first substrate 31 away from the light guide plate 1, and the second protrusions 42 have a triangular cross-section and have one side on the surface of the second substrate 41 away from the first prism sheet 3. Thereby facilitating the light to be emitted and deflected through the surfaces of the first protrusions 32 and the second protrusions 42, and thus satisfying the light-emitting angle requirement of the backlight structure 100.
Further, as shown in fig. 2 to 4, the first protrusion 32 includes a first surface 321 close to the light source 2 and a second surface 322 far from the light source 2, the second protrusion 42 includes a third surface 421 close to the light source 2 and a fourth surface 422 far from the light source 2, after the light emitted from the light guide plate 1 enters the first prism sheet 3, the light is emitted from the second surface 322 and enters the second prism sheet 4, and is emitted from the fourth surface 422, the first surface 321 and the first base are present, the plate 62 has an angle β, the second surface 322 has an angle α with respect to the first substrate 31, the angle between the third surface 421 and the second substrate 41 is α 1, the angle between the third surface 421 and the second substrate 41 is α 2, the incident angle of the light entering the first prism sheet 3 is θ 2, the corresponding angle is θ 3, the exit angle of the light emitted from the first prism sheet 3 is θ 4, the corresponding refraction angle is θ 5, the incident angle of the light entering the second prism sheet 4 is θ 6, the corresponding angle is θ 7, the exit angle of the light emitted from the second prism sheet is θ 8, and the exit angle is θ 9,
according to the refraction principle
sinθ3＝sinθ2/n (1)
θ4＝θ3-α (2)
sinθ5＝n*sinθ4 (3)
θ6＝θ5+α (4)
sinθ6＝n*sinθ7 (5)
θ8＝α2-θ7 (6)
sinθ9＝n*sinθ8 (7)
Wherein n is the refractive index of the prism material, α 1 and β are set angles, the ridge between the first face 321 and the second face 322 is a first ridge 323, the ridge between the third face 421 and the fourth face 422 is a second ridge 423, the distance between two adjacent first ridges 323 is a first set value, the distance between two adjacent second ridges 423 is a second set value, the height of the first ridge 323 from the first substrate 31 is a first set height, and the height of the second ridge 423 from the second substrate 41 is a second set height.
The final emergent angle of the light is theta 9, when the theta 9 is α 2, the light is emergent perpendicular to the prism surface, so that the corresponding α 2 can be adjusted according to the required emergent angle direction, and the equivalent non-gradient reverse prism backlight emergent effect and the gradient reverse prism backlight emergent effect are realized.
In addition, after the material of the light guide plate 1 is determined, θ 2 can be determined, α can be obtained through the first set value, the first set height value, β and the above (1) - (7), so that the first protrusion 32 can be reasonably arranged to meet the requirement of the light emitting angle of the backlight structure 100. in addition, in order to avoid too much stray light, as shown in fig. 5, the rightmost light ray is optionally β to θ 3, it can be understood that β can be changed between 90 ° and θ 3, and an angle value between 90 ° and θ 3 can be selected, so that the light emitting angle can be better ensured to meet the requirement.
In addition, α 2 can be obtained according to the second setting value, the second setting height values α 1, α and the above (1) - (7), so that the second protrusion 42 can be reasonably arranged to meet the requirement of the light-emitting angle of the backlight structure 100. in addition, in order to avoid too much stray light, such as the leftmost ray shown in fig. 5, alternatively, α 1 can be 90 degrees to theta 7, it can be understood that α 1 can be changed between 90 degrees and theta 7, and an angle value between 90 degrees and theta 7 can be selected, so that the light-emitting angle can be better ensured to meet the requirement.
Optionally, the first set value is 24 μm. The second setting value is 16-18 μm. Thereby preventing moire phenomenon from being caused. Wherein the second set value may be 16.5 μm, 17 μm, 17.5 μm, or the like.
In addition, when the first set value is 24 μm, the inclination angle α of the prism calculated according to the above formula is about 30 ° so that the heights of the first prism sheet 3 and the second prism sheet 4 are kept the same as the normal inverse prism height, and when emission is performed vertically from α about 30 °, α 2 calculated according to the formulas (1) to (7) is about 56 °.
The appropriate solutions obtained by equations (1) to (7) are all the design ideas of this solution.
Optionally, the haze of the haze layer 5 is 20% to 40%. Therefore, the uniformity of the dispersion of the light after passing through the haze layer 5 can be improved, and the picture quality can be improved.
Optionally, the light source 2 is an L ED lamp, and the L ED lamp has the advantages of energy saving, long service life, capability of operating at a high speed, good shock resistance and the like, so that the service life and the operational reliability of the backlight structure 100 can be improved.
The light deflection of the backlight structure 100 according to the embodiment of the present invention is described below with reference to fig. 7 to 9, in which θ 9 and α 2 are illustrated as the same example.
FIG. 7 shows the following result after the light passes through the light guide plate 1; fig. 8 shows the light-emitting result after the light passes through the first prism sheet 3, and the light emitted from the light guide plate 1 is deflected by a certain angle in the direction perpendicular to the light guide plate 1; fig. 9 shows the light exiting from the second prism sheet 4, and the light exits substantially perpendicular to the light guide plate 1.
According to the L CD display module of the embodiment of the invention, the backlight structure 100 and the L CD display screen are included, the L CD display screen and the backlight structure 100 are stacked, the L CD display screen is located on the side of the second prism sheet 4 far away from the first prism sheet 3, and the backlight structure 100 can provide a light source for the L CD display screen.
According to the L CD display module of the embodiment of the invention, the haze layer 5 is arranged on the side of the second prism sheet 4 close to the first prism sheet 3, so that the haze layer 5 is arranged on the side of the second prism sheet 4 far from human eyes, and the light is dispersed better after passing through the haze layer 5, thereby effectively improving the granular sensation phenomenon of the haze layer 5 after being amplified by an optical system and improving the picture quality.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A backlight structure, comprising:
a light guide plate;
the light sources are arranged on the side face of the light guide plate and distributed at intervals along the length direction of the corresponding side wall of the light guide plate;
the first prism sheet is stacked and spaced apart from the light guide plate, and comprises a first substrate and a plurality of first protrusions, the first protrusions are arranged on one side, far away from the light guide plate, of the first substrate, each first protrusion extends along the arrangement direction of the light sources, and the arrangement direction of the first protrusions is perpendicular to the extension direction of the first protrusions;
the second prism sheet and the first prism sheet are arranged in a stacked mode and spaced apart, the second prism sheet is located on one side, far away from the light guide plate, of the first prism sheet, the second prism sheet comprises a second substrate and a plurality of second protrusions, the second protrusions are arranged on one side, far away from the first prism sheet, of the second substrate, the extending direction of each second protrusion is the same as that of the first protrusion, the arrangement direction of the second protrusions is the same as that of the first protrusions, and a haze layer is arranged on the surface, close to the first prism sheet, of the second substrate.
2. The backlight structure of claim 1, wherein the first substrate has a thickness d1, the second substrate has a thickness d2, d1 ≥ 65 μm, and d2 ≥ 65 μm.
3. The backlight structure of claim 2, wherein d1+ d2 is ≦ 250 μm.
4. The backlight structure according to claim 2, wherein the first substrate and the second substrate have thicknesses satisfying: d1 ═ d 2.
5. The backlight structure of claim 1, wherein the first protrusions have a triangular cross-section and have one side on a surface of the first substrate away from the light guide plate, and the second protrusions have a triangular cross-section and have one side on a surface of the second substrate away from the first prism sheet.
6. The backlight structure according to claim 4, wherein the first protrusion includes a first surface close to the light source and a second surface far from the light source, the second protrusion includes a third surface close to the light source and a fourth surface far from the light source, the light emitted from the light guide plate enters the first prism sheet, is emitted from the second surface and is emitted onto the second prism sheet, and is emitted from the fourth surface, the angle between the first surface and the first substrate is β, the angle between the second surface and the first substrate is α, the angle between the third surface and the second substrate is α, the angle between the third surface and the second substrate is α, the angle of incidence of the light entering the first prism sheet is θ 2, the corresponding angle of refraction is θ 3, the angle of the light emitted from the first prism sheet is θ 4, the corresponding angle of refraction is θ 5, the angle of the light entering the second prism sheet is θ 6, the corresponding angle of refraction is θ 7, the angle of the light emitted from the second prism sheet is θ 4, the corresponding angle of the first prism sheet is θ 5, the distance between the first edge and the adjacent second edge is set as the distance between the first edge 82, and the distance between the second edge between the first edge is set as the distance between the first edge, the distance between the second edge and the second edge, the distance between the second edge is set value, the distance between the first edge is set as a set value, and the distance between the second edge, the distance between the second edge is set as a set value, the distance, the second distance between the second edge is 369, the second edge is set as a distance, the distance between the second edge is set as a distance between the second edge, the second edge is set as a distance, the.
7. The backlight structure according to claim 6, wherein the first setting value is 24 μm.
8. The backlight structure of claim 6, wherein the second predetermined value is 16-18 μm.
9. The backlight structure of claim 6, wherein the β is 90 ° - θ 3.
10. The backlight structure of claim 6, wherein the α 1 is 90- θ 7.
11. The backlight structure according to any of claims 1-10, wherein the haze layer has a haze of 20% to 40%.
12. The backlight structures defined in any one of claims 1-10 wherein the light source is an L ED lamp.
13. An L CD display module comprising the backlight structure of any one of claims 1-12.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010460358.8A CN111474624A (en) | 2020-05-27 | 2020-05-27 | Backlight structure and L CD display module |
| PCT/CN2021/095754 WO2021238906A1 (en) | 2020-05-27 | 2021-05-25 | Backlight structure and lcd display module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010460358.8A CN111474624A (en) | 2020-05-27 | 2020-05-27 | Backlight structure and L CD display module |
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| CN111474624A true CN111474624A (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010460358.8A Pending CN111474624A (en) | 2020-05-27 | 2020-05-27 | Backlight structure and L CD display module |
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| CN (1) | CN111474624A (en) |
| WO (1) | WO2021238906A1 (en) |
Cited By (3)
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| WO2021238906A1 (en) * | 2020-05-27 | 2021-12-02 | 京东方科技集团股份有限公司 | Backlight structure and lcd display module |
| WO2023206858A1 (en) * | 2022-04-28 | 2023-11-02 | 瑞仪(广州)光电子器件有限公司 | Backlight module and display device |
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