CN106226951B - Side-in backlight module and display device - Google Patents
Side-in backlight module and display device Download PDFInfo
- Publication number
- CN106226951B CN106226951B CN201610642456.7A CN201610642456A CN106226951B CN 106226951 B CN106226951 B CN 106226951B CN 201610642456 A CN201610642456 A CN 201610642456A CN 106226951 B CN106226951 B CN 106226951B
- Authority
- CN
- China
- Prior art keywords
- light
- guide plate
- light guide
- light source
- backlight module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a side-in type backlight module and a display device. Therefore, the light incident surface of the light guide plate is arranged to be the inclined surface, the light source is also inclined along the inclined surface, and the light guide plate is subjected to oblique cutting type design and forming by utilizing the principle that the hypotenuse of the right-angled triangle is the longest, so that the thickness of the light guide plate adopting the inclined surface is smaller under the condition that the light incident surface of the light guide plate has the same area, and the light and thin lateral entering type backlight module is realized. Moreover, the area of the light incident surface is increased by the inclined surface, light rays obliquely emitted by the light source can be effectively shielded, the problem of light incident side bright bands in the traditional side-in backlight module is solved, and a black edge is not required to be printed by silk screen.
Description
Technical Field
The invention relates to the field of liquid crystal display, in particular to a side-in type backlight module and a display device.
Background
in a conventional side-in backlight module, as shown in fig. 1, the light guide plate 100 and the LED light bar 200 are designed to be centered, and a gap of 0.3-0.5mm is generally designed between the light guide plate and the LED light bar. Most of the light energy of the LED light bar 200 can enter the light guide plate 100 in the forward direction, but due to the longitudinal light emitting angle of the LED light bar 200, a small portion of the light is emitted obliquely from the gap between the light guide plate 100 and the LED light bar 200 to form a bright band. At present, the problem of bright bands of the side-entry backlight module cannot be thoroughly improved from a design end, and the problem of the bright bands can be solved only by using a black light absorption principle and by silk-screening the black edge 400 on one side of the diaphragm 300 close to the LED light bar 200, so that the method is high in cost and low in reliability.
Due to the existence of the bright band problem, in the design of the side-in type backlight module, the thickness of the light guide plate generally selected is larger than the height of the light bar so as to ensure the feasibility and stability of the design (shielding the light rays obliquely emitted by the LED as much as possible). In the prior art, because of the existence of the longitudinal light-emitting angle of the LED, the light incident side often has a bright band phenomenon, and the silk-screen black edge diaphragm used for solving the problem of the bright band has high cost and low reliability; and because of the existence of the bright band problem, the thickness of the light guide plate must be greater than or equal to the height of the LED, which restricts the development of the lateral backlight module to be light and thin.
Thus, the prior art has yet to be improved and enhanced.
Disclosure of Invention
in view of the above disadvantages of the prior art, an object of the present invention is to provide a side-in type backlight module and a display device, which effectively solve the problem of bright band on the light incident side in the conventional side-in type backlight module, and achieve the lightness and thinness of the side-in type backlight module.
In order to achieve the purpose, the invention adopts the following technical scheme:
the side-in type backlight module comprises a light guide plate and a light source, wherein the light incident surface of the light guide plate is an inclined surface, the light source is arranged in an inclined mode, and the light emergent surface of the light source is opposite to the light incident surface of the light guide plate.
in the side-in type backlight module, the light incident surface of the light guide plate is parallel to the light emergent surface of the light source.
In the side-in type backlight module, an included angle a between the light incident surface of the light guide plate and the horizontal plane satisfies a formula:Wherein H is the thickness of the light guide plate,d is the distance from the light emitting surface of the light source to the light incident surface of the light guide plate, and b is the light emitting angle of the light source.
In the side-in type backlight module, an included angle a between the light incident surface of the light guide plate and the horizontal plane satisfies a formula:Wherein, H is the thickness of the light guide plate, d is the distance from the light emitting surface of the light source to the light incident surface of the light guide plate, b is the light emitting angle of the light source, and L is the width of the light source.
in the side-in backlight module, an included angle between the light incident surface of the light guide plate and the horizontal plane is less than or equal to 74 degrees.
in the side-in type backlight module, the included angle between the light incident surface of the light guide plate and the horizontal plane is 45 degrees.
in the side-in type backlight module, the length of the top surface of the light guide plate is longer than that of the bottom surface of the light guide plate, and a reflecting layer for reflecting light is arranged on the part, exceeding the bottom surface of the light guide plate, of the top surface of the light guide plate.
in the side-in type backlight module, the length of the bottom surface of the light guide plate is longer than that of the top surface of the light guide plate, and the bottom surface of the light guide plate is provided with a reflecting sheet.
In the side-in type backlight module, the side-in type backlight module further comprises a back plate, the light guide plate is arranged at the bottom of the back plate, the light source is arranged on the side edge of the back plate, and the side edge of the back plate, on which the light source is arranged, inclines along the inclination direction of the light incident surface.
A display device comprises the lateral entrance type backlight module.
Compared with the prior art, in the lateral backlight module and the display device provided by the invention, the lateral backlight module comprises the light guide plate and the light source, the light incident surface of the light guide plate is an inclined surface, the light source is arranged in an inclined manner, and the light emergent surface of the light source is opposite to the light incident surface of the light guide plate. Therefore, the light incident surface of the light guide plate is arranged to be the inclined surface, the light source is also inclined along the inclined surface, and the light guide plate is subjected to oblique cutting type design and forming by utilizing the principle that the hypotenuse of the right-angled triangle is the longest, so that the thickness of the light guide plate adopting the inclined surface is smaller under the condition that the light incident surface of the light guide plate has the same area, and the light and thin lateral entering type backlight module is realized. Moreover, the area of the light incident surface is increased by the inclined surface, light rays obliquely emitted by the light source can be effectively shielded, the problem of light incident side bright bands in the traditional side-in backlight module is solved, and a black edge is not required to be printed by silk screen.
Drawings
FIG. 1 is a schematic cross-sectional view of a conventional edge-type backlight module;
FIG. 2 is a cross-sectional view of a side-entry backlight module according to a first embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view illustrating a side-entry backlight module according to a first embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a light guide plate in the edge-type backlight module according to the present invention;
Fig. 5 is a cross-sectional view of a side-entry backlight module according to a second embodiment of the present invention.
Detailed Description
The invention provides a side-in type backlight module and a display device. In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
the invention provides a display device, which comprises a side-in type backlight module, namely, the display device is provided with a backlight source by the side-in type backlight module and comprises a liquid crystal display, a liquid crystal television, an advertising machine and the like.
Fig. 2 and 3 are schematic diagrams of longitudinal sections of the side-in type backlight module, the longitudinal sections being relative to the light source, namely, the longitudinal direction of the light source. The side-in type backlight module comprises a light guide plate 10 and a light source 20, wherein a light incident surface 110 of the light guide plate 10 is an inclined surface, the light source 20 is arranged in an inclined manner, in other words, a certain included angle is formed between a light emergent surface of the light source 20 and a horizontal plane, the light emergent surface of the light source 20 is opposite to the light incident surface 110 of the light guide plate, in other words, light emitted by the light source 20 directly enters the light incident surface 110 of the light guide plate.
Therefore, the light incident surface 110 of the light guide plate is set to be an inclined surface, the light source 20 is also inclined along the inclined surface, and the light guide plate is obliquely designed and molded by utilizing the principle that the hypotenuse of the right triangle is the longest, so that the thickness of the light guide plate adopting the inclined surface is smaller under the condition that the light incident surface 110 of the light guide plate has the same area, and the light-weight and thin side-entering type backlight module is realized. Moreover, the area of the light incident surface is increased due to the inclined design of the edge of the light guide plate, light rays obliquely emitted by the light source can be effectively shielded, the problem of light incident side bright bands in the traditional side-in type backlight module is solved, a black edge is not required to be silk-screened or a shading adhesive tape is not required to be pasted, and the cost is saved.
Preferably, the light incident surface 110 of the light guide plate is parallel to the light emergent surface of the light source 20, so that the light emitted from the light source 20 is perpendicularly incident into the light guide plate, and the light loss is reduced. The light source is preferably an LED light bar. The light source includes an LED chip 210 and a PCB board 220.
Referring to fig. 4, H is the thickness of the light guide plate 10, d is the distance from the light emitting surface of the light source 20 to the light incident surface of the light guide plate, and b is the light emitting angle of the light source 20. According to the sine theorem, the width a = H/sina of the light incident surface 110 of the light guide plate, and the width a of the light incident surface of the light guide plate is greater than the thickness H of the light guide plate, in other words, the light guide plate of the edge-type backlight module provided by the invention is thinner than that of the light guide plate in the prior art under the condition that the areas of the light incident surfaces of the light guide plate are equal. In order to prevent the light emitted from the central position of the light source 20 from exceeding the light incident surface 110 of the light guide plate, an included angle a between the light incident surface 110 of the light guide plate and a horizontal plane needs to satisfy formula (1):(ii) a I.e. the thickness of the guide rail plateThe minimum of which can be taken. When the light guide plate is the smallest in thickness, the light emitted from the light source 20 just does not exceed the light incident surface of the light guide plate. If the method shown in FIG. 1 is adoptedIn the prior art, the thickness of the guide rail plate is thick under the condition of no light leakageIt is obvious that the minimum thickness of the light guide plate in the prior art is larger than that of the present invention. The smaller the included angle a between the light incident surface 110 of the light guide plate and the horizontal plane is, the smaller the minimum thickness of the light guide plate is. Taking the example that the thickness H =2mm of the light guide plate, the distance d =0.6mm from the light emitting surface of the light source 20 to the light incident surface of the light guide plate, and the longitudinal light emitting angle b of the light source is 120 °, the constants are substituted into the formula (1), and a is calculated to be less than or equal to 74 °, in other words, the included angle a between the light incident surface of the light guide plate and the horizontal plane is less than or equal to 74 °. In other words, in the case that a is less than or equal to 74 degrees in design theory, the light energy of the LED can be prevented from leaking out longitudinally. In practice, of course, the design values of H, b, d are variable. Generally, the distance d from the light emitting surface of the light source 20 to the light incident surface of the light guide plate is between 0.4mm and 0.6 mm.
In the above case, it is considered that the light rays at the center of the light source 20 do not exceed the light incident surface 110 of the light guide plate, and under the condition that the light rays at the two ends of the light source 20 do not exceed the light incident surface 110 of the light guide plate, the above formula (1) becomes:equation (2), where L is the width of the light source 20. If the width L =2mm of the light source 20, the distance d =0.4mm from the light exit surface of the light source 20 to the light entrance surface of the light guide plate, and the other data are as described above, the included angle a between the light entrance surface of the light guide plate and the horizontal plane is less than or equal to 36.2 °. That is, under the condition that the thickness of the light guide plate is the same as the width of the light source, the included angle a is set to be less than or equal to 36.2 degrees to ensure that the backlight module does not leak light; when the distance d =0.6mm from the light emitting surface of the light source 20 to the light incident surface of the light guide plate and other data are as described above, the included angle a between the light incident surface of the light guide plate and the horizontal plane is less than or equal to 29 °. That is, under the condition that the thickness of the light guide plate is the same as the width of the light source, the included angle a is set to be less than or equal to 29 degrees to ensure that the backlight module does not leak light; in the prior art, under the condition that the thickness of the light guide plate is the same as the width of the light source, if the black edge is not printed in a silk screen manner, light leakage inevitably occurs.therefore, the light incident surface of the light guide plate is arranged to be the inclined surface, and the light backlight module can be thinned only by adjusting the included angle a between the light incident surface 110 of the light guide plate and the horizontal plane and the thickness H of the light guide plate, and light leakage (bright band) can be avoided. In view of the angle of the overall design, the light leakage and the dimensional balance of the components, the light guide plate beveling angle a (the included angle a) is preferably in the range of 29 ° to 36 °, i.e. 29 ° ≦ a ≦ 36 °, and in this embodiment, the light guide plate beveling angle a is preferably 30 °.
of course, in other embodiments, if consideration is given to factors such as the FPC assembly between the light guide plate and the existing LCD panel, the included angle a between the light incident surface of the light guide plate and the horizontal plane is preferably between 40 ° or more and 74 ° or less, and is preferably about 45 °, such as 41 °, 42 °, 43 °, 44 °, 45 °, 46 °, 47 °, 48 °, and 49 °. As shown in table 1 below, the optical data of the chamfered light guide plate (i.e. the light guide plate of the side-entry backlight module of the present invention) and the conventional light guide plate are compared on four side-entry models with main stream sizes of 40, 43, 49 and 55 inches, respectively, under the following test conditions: testing an instrument: CA-310, test temperature: testing aging time at 25 +/-2 ℃: 30 mins; the test items are: center luminance Lc, x, y color coordinates. The angle a used in the test was 45 °. As can be seen from table 1, under the same conditions, the brightness of the oblique-cut light guide plate is improved by 3% to 5% compared to the conventional light guide plate, and the oblique-cut light guide plate does not affect the backlight color point data.
table 1.
The side-in type backlight module further comprises a back plate 30, the light guide plate 10 is arranged at the bottom of the back plate 30, the light source 20 is arranged on the side edge of the back plate 30, and the side edge of the back plate, on which the light source is arranged, is inclined along the inclination direction of the light incident surface. That is, the back plate 30 is bent at a side where the light source is fixed, so as to form an inclined plane adapted to the light incident surface 110 of the light guide plate, and the light source 20 is fixed at a side of the back plate 30.
The bottom of the back plate 30 is also provided with (bent) a heat dissipation groove 310. Preferably, the number of the heat dissipation grooves 310 is two, which facilitates heat dissipation.
Further, the lateral backlight module further includes a heat dissipation aluminum bar 40, an optical film 50 and a reflector 60. The optical film 50, the light guide plate 10, the reflector 60 and the heat dissipation aluminum strip 40 are sequentially stacked at the bottom of the back plate 30, that is, the reflector is disposed on the bottom surface of the light guide plate 10. The light source 20 is disposed on the inner sidewall of the heat dissipation aluminum strip 40, and the outer sidewall of the heat dissipation aluminum strip 40 is disposed on the back plate 30. The heat dissipation aluminum strip 40 is disposed between the light guide plate 10 and the back plate 30, and is beneficial to heat dissipation of the light source 20.
Fig. 2 and 3 show a first embodiment of the present invention, in which the length of the top surface of the light guide plate 10 is longer than the length of the bottom surface of the light guide plate 10, and the corresponding back plate 30 and the heat dissipation aluminum strip 40 are bent to make the side edge inclination angle equal to the angle a. A portion of the top surface of the light guide plate 10 exceeding the bottom surface of the light guide plate 10 is provided with a reflective layer 70 for reflecting light. Specifically, the reflective layer 70 extends from an end of the optical film 50 adjacent to the light source to an end of the light guide plate adjacent to the light source. The reflective layer 70 mainly functions to return the scattered light to the light guide plate 10, thereby improving the utilization rate of the module to light energy.
Fig. 5 is a second embodiment of the present invention, in the second embodiment, the length of the bottom surface of the light guide plate 10 is longer than the length of the top surface of the light guide plate 10, and the corresponding back plate 30 and the heat dissipation aluminum strip 40 are bent to realize the same side edge inclination angle and angle a, so that the light of the LED can be irradiated from top to bottom.
In summary, the lateral-entrance backlight module provided by the invention utilizes the longest hypotenuse of the right triangle to implement the oblique-cut design of the light guide plate, so as to enlarge the area of the light incident surface of the light guide plate and eliminate the problem of bright bands on the light incident side of the lateral-entrance backlight module from the design end. The cutting angle of the oblique-cutting light guide plate is variable, and a thinner light guide plate can be used for matching under the condition that the LED scheme is not changed, so that the side-entering type backlight module is light and thin. The edge part of the light-emitting surface of the lower oblique light guide plate needs to be attached with a reflecting layer to improve the utilization rate of the system to light energy, and the reflecting layer takes a silver reflecting layer as the best reflecting layer. The oblique light guide plate can improve the utilization rate of the backlight module system to the light energy of the LED, and can improve the average brightness of the light emitting surface by 3-5%.
it should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (5)
1. A side-in type backlight module comprises a light guide plate and a light source, and is characterized in that the light incident surface of the light guide plate is an inclined surface, the light source is arranged in an inclined manner, and the light emergent surface of the light source is opposite to the light incident surface of the light guide plate;
the light incident surface of the light guide plate is parallel to the light emergent surface of the light source;
The length of the top surface of the light guide plate is longer than that of the bottom surface of the light guide plate, and a reflecting layer for reflecting light is arranged on the part, exceeding the bottom surface of the light guide plate, of the top surface of the light guide plate;
The side-in type backlight module also comprises a back plate, the light guide plate is arranged at the bottom of the back plate, the light source is arranged at the side edge of the back plate, and the side edge of the back plate, provided with the light source, is inclined along the inclination direction of the light incident surface;
The side-in backlight module further comprises: the device comprises a heat dissipation aluminum strip, an optical membrane and a reflector plate; the optical diaphragm, the light guide plate, the reflector plate and the heat dissipation aluminum strip are sequentially stacked and arranged at the bottom of the back plate;
The included angle a between the light incident surface of the light guide plate and the horizontal plane satisfies the formula:H is the thickness of the light guide plate, d is the distance from the light emitting surface of the light source to the light incident surface of the light guide plate, b is the light emitting angle of the light source, L is the width of the light source, and the thickness of the light guide plate is the same as the width of the light source;
The corresponding back plate and the corresponding heat dissipation aluminum strip are bent to realize that the side edge inclination angle is the same as the angle a.
2. A side-in type backlight module comprises a light guide plate and a light source, and is characterized in that the light incident surface of the light guide plate is an inclined surface, the light source is arranged in an inclined manner, and the light emergent surface of the light source is opposite to the light incident surface of the light guide plate;
The light incident surface of the light guide plate is parallel to the light emergent surface of the light source;
The length of the bottom surface of the light guide plate is longer than that of the top surface of the light guide plate, and a reflecting sheet is arranged on the bottom surface of the light guide plate;
The side-in type backlight module also comprises a back plate, the light guide plate is arranged at the bottom of the back plate, the light source is arranged at the side edge of the back plate, and the side edge of the back plate, provided with the light source, is inclined along the inclination direction of the light incident surface;
the side-in backlight module further comprises: the device comprises a heat dissipation aluminum strip, an optical membrane and a reflector plate; the optical diaphragm, the light guide plate, the reflector plate and the heat dissipation aluminum strip are sequentially stacked and arranged at the bottom of the back plate;
The included angle a between the light incident surface of the light guide plate and the horizontal plane satisfies the formula:h is the thickness of the light guide plate, d is the distance from the light emitting surface of the light source to the light incident surface of the light guide plate, b is the light emitting angle of the light source, L is the width of the light source, and the thickness of the light guide plate is the same as the width of the light source;
The corresponding back plate and the corresponding heat dissipation aluminum strip are bent to realize that the side edge inclination angle is the same as the angle a.
3. the edge-type backlight module of claim 1 or 2, wherein an angle between the light incident surface of the light guide plate and a horizontal plane is less than or equal to 74 °.
4. the edge-type backlight module of claim 1 or 2, wherein an angle between the light incident surface of the light guide plate and a horizontal plane is 45 °.
5. A display device, comprising the lateral backlight module of any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610642456.7A CN106226951B (en) | 2016-08-08 | 2016-08-08 | Side-in backlight module and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610642456.7A CN106226951B (en) | 2016-08-08 | 2016-08-08 | Side-in backlight module and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106226951A CN106226951A (en) | 2016-12-14 |
| CN106226951B true CN106226951B (en) | 2019-12-10 |
Family
ID=57548600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610642456.7A Active CN106226951B (en) | 2016-08-08 | 2016-08-08 | Side-in backlight module and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106226951B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107589591A (en) * | 2017-08-30 | 2018-01-16 | 惠科股份有限公司 | A kind of liquid crystal display device |
| CN107589567A (en) * | 2017-08-30 | 2018-01-16 | 惠科股份有限公司 | A kind of manufacture method of liquid crystal display device |
| CN107422534B (en) * | 2017-08-30 | 2020-04-24 | 惠科股份有限公司 | Liquid crystal display device |
| CN109541847A (en) * | 2018-12-21 | 2019-03-29 | 武汉华星光电技术有限公司 | Backlight module and display device |
| CN110147011B (en) * | 2019-07-04 | 2022-04-19 | 京东方科技集团股份有限公司 | Display device |
| CN110488537A (en) * | 2019-08-27 | 2019-11-22 | 深圳市泰坦士科技有限公司 | A kind of backlight module |
| CN114624810B (en) * | 2022-05-17 | 2022-08-16 | 深圳市北泰显示技术有限公司 | Backlight unit light source inclined touch screen |
| CN114624811B (en) * | 2022-05-17 | 2022-08-16 | 深圳市北泰显示技术有限公司 | Production method of display screen backlight module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011238448A (en) * | 2010-05-10 | 2011-11-24 | Hitachi Consumer Electronics Co Ltd | Backlight, its manufacturing method, and liquid crystal display |
| CN102434824A (en) * | 2011-11-09 | 2012-05-02 | 友达光电（苏州）有限公司 | Backlight module |
| CN202791686U (en) * | 2012-09-29 | 2013-03-13 | 东莞市亚星半导体有限公司 | Backlight unit of ultrathin liquid crystal screen |
| CN203444211U (en) * | 2013-09-11 | 2014-02-19 | Tcl通力电子（惠州）有限公司 | Display device and backlight module thereof |
| CN104421770A (en) * | 2013-09-11 | 2015-03-18 | 联想(北京)有限公司 | Backlight module and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100769922B1 (en) * | 2001-03-26 | 2007-10-24 | 삼성전자주식회사 | Backlight assembly and liquid crystal display device having the same |
-
2016
- 2016-08-08 CN CN201610642456.7A patent/CN106226951B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011238448A (en) * | 2010-05-10 | 2011-11-24 | Hitachi Consumer Electronics Co Ltd | Backlight, its manufacturing method, and liquid crystal display |
| CN102434824A (en) * | 2011-11-09 | 2012-05-02 | 友达光电（苏州）有限公司 | Backlight module |
| CN202791686U (en) * | 2012-09-29 | 2013-03-13 | 东莞市亚星半导体有限公司 | Backlight unit of ultrathin liquid crystal screen |
| CN203444211U (en) * | 2013-09-11 | 2014-02-19 | Tcl通力电子（惠州）有限公司 | Display device and backlight module thereof |
| CN104421770A (en) * | 2013-09-11 | 2015-03-18 | 联想(北京)有限公司 | Backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106226951A (en) | 2016-12-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106226951B (en) | Side-in backlight module and display device | |
| US9971081B1 (en) | Lighting device and display device | |
| US8672528B2 (en) | Planar illumination device and display device provided with the same | |
| US9268081B2 (en) | Light guide assembly, backlight module and liquid crystal display | |
| US10302850B2 (en) | Backlight module and liquid crystal display | |
| US20130128190A1 (en) | Backlight Module and LCD Device | |
| US7553061B2 (en) | Side type backlight module | |
| US20160266440A1 (en) | Lampshade, backlight module and display apparatus | |
| CN115176197B (en) | Optical film, backlight module and display device | |
| US10627676B2 (en) | Transparent display device and transparent exhibition apparatus having the same | |
| US20150022756A1 (en) | Backlight module and corresponding liquid crystal display device | |
| US9377572B2 (en) | Backlight unit and display apparatus having the same | |
| CN102620205B (en) | Edge-lighting type backlight module and liquid crystal display comprising same | |
| US11340494B2 (en) | Backlight module and display device | |
| CN103953893A (en) | Dimming unit, backlight module and display device | |
| US10067281B2 (en) | Backlight module and liquid crystal display | |
| US20160209571A1 (en) | Backlight module and display device | |
| US8958029B2 (en) | Liquid crystal display device | |
| US11036081B2 (en) | Display device | |
| CN210514876U (en) | Backlight module and display panel | |
| CN114141164A (en) | Electronic device | |
| JP2022023207A (en) | Display device | |
| US9632354B2 (en) | Backlight module and light source assembly of the backlight module | |
| KR101746675B1 (en) | Multi-light guide sheet and liquid crystal display device including the same | |
| KR20170033478A (en) | Double-sided Display Device and Backlight Unit therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210706 Address after: Room 821, No. 333, jiufo Jianshe Road, Zhongxin Guangzhou Knowledge City, Huangpu District, Guangzhou, Guangdong 510000 Patentee after: Skyworth Group Intelligent Technology Co., Ltd Address before: 510530 No.99, Kaida Road, Science City, Guangzhou Economic and Technological Development Zone, Guangdong Province Patentee before: GUANGZHOU SKYWORTH FLAT DISPLAY TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right |