CN111679506A - Backlight module and electronic equipment - Google Patents
Backlight module and electronic equipment Download PDFInfo
- Publication number
- CN111679506A CN111679506A CN202010606844.6A CN202010606844A CN111679506A CN 111679506 A CN111679506 A CN 111679506A CN 202010606844 A CN202010606844 A CN 202010606844A CN 111679506 A CN111679506 A CN 111679506A
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- Prior art keywords
- light
- guide plate
- light guide
- light emitting
- backlight module
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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
-
- 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
- G02B6/0023—Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
- G02B6/0031—Reflecting element, sheet or layer
Abstract
The application discloses backlight unit and electronic equipment belongs to electronic equipment and shows technical field. The backlight module comprises a light guide plate, a first reflecting part and a light emitting part; in a direction perpendicular to the light guide plate (110), the light guide plate (110) and the light emitting member (300) are stacked, the light guide plate includes a first surface, a second surface, and a side surface, the first surface and the second surface are disposed opposite to each other in a thickness direction of the light guide plate, the side surface is connected between the first surface and the second surface, the light emitting member (300) faces the first surface, the first reflection portion (200) is disposed on one side of the light guide plate (110), and light emitted by the light emitting member (300) can be reflected from the side surface into the light guide plate (110) through the first reflection portion (200). The screen of the electronic equipment can be solved by the scheme, and the problem of small screen occupation is solved.
Description
Technical Field
The application belongs to the technical field of electronic equipment display, and particularly relates to a backlight module and electronic equipment.
Background
A Liquid Crystal Display (LCD) module is commonly used as a display module of an electronic device such as a smart phone or a computer, and the LCD module has the advantages of thin body, power saving, no radiation, and the like. However, the liquid crystal display material itself does not have a light emitting property, and therefore, the backlight module is disposed in the electronic device, and the backlight module can provide a light source for the display module, so that the liquid crystal display module can normally operate.
In the related art, the backlight module includes a light guide plate and a light emitting element, the light emitting element is disposed at one end of the light guide plate, a light emitting surface of the light emitting element is disposed opposite to a side surface of the light guide plate, and light emitted from the light emitting element enters the light guide plate through the side surface of the light guide plate in parallel.
In the process of implementing the present invention, the inventor finds that in the related art, the black edge of the backlight module is formed by the edge of the carrying frame, the light emitting element and the light mixing area of the backlight module, and at this time, the black edge of the backlight module is large, which causes the black edge of the electronic device to be large, resulting in a small screen occupation ratio of the electronic device.
Disclosure of Invention
The embodiment of the application aims to provide a backlight module and electronic equipment, and the problem that the screen of the electronic equipment occupies a small area can be solved.
In order to solve the technical problem, the present application is implemented as follows:
the embodiment of the application provides a backlight module, which comprises a light guide plate, a first reflecting part and a light emitting part;
in the perpendicular to in the direction of light guide plate, the light guide plate with the illuminating part superpose, the illuminating part orientation the first face of light guide plate, first reflection part set up in one side of light guide plate, the light guide plate includes first face, second face and side, first face with the second face is in the thickness direction of light guide plate is carried on the back mutually and is set up, the side is connected first face with between the second face, the light accessible that the illuminating part sent first reflection part from the side reflection of light guide plate extremely in the light guide plate.
The embodiment of the application provides electronic equipment, which comprises the backlight module.
In this embodiment, light guide plate and illuminating part are arranged along backlight unit's thickness direction, illuminating part launches light and passes first face, get into the light guide plate from the side of light guide plate after the reflection of first reflection part, in this scheme, light guide plate and illuminating part superpose, at this moment, backlight unit's black limit is the marginal width of bearing frame and the width of mixed light region, and then reduced illuminating part's width, the installation space that illuminating part took in backlight unit's width direction is less, make backlight unit's black limit reduce, and then make electronic equipment's black limit less, make electronic equipment's screen account for than great.
Drawings
Fig. 1 is a schematic structural diagram of a backlight module disclosed in an embodiment of the present application;
fig. 2 is a partial cross-sectional view of a backlight module disclosed in an embodiment of the present application;
fig. 3 is a schematic view of a carrier frame and a light emitting element in a backlight module disclosed in an embodiment of the present application.
Description of reference numerals:
110-light guide plate, 120-bearing frame, 121-containing space, 130-shading part, 131-first shading layer, 132-second shading layer, 140-brightening film, 141-first brightening film, 142-second brightening film, 150-second reflecting part, 160-shading part, 170-diffusion film,
200-a first reflection part,
300-a light emitting member,
400-circuit board,
500-light emitting area.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.
The backlight module provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.
Referring to fig. 1 to 3, an embodiment of the present application discloses a backlight module applied to an electronic device, wherein a light emitting side of the backlight module faces a display module of the electronic device, the backlight module has a light emitting region 500, and the light emitting region 500 is opposite to a display region of the display module, so as to provide a light source for the display module. The disclosed backlight module includes a light guide plate 110, a first reflection part 200, and a light emitting member 300.
The light guide plate 110 is overlapped with the light emitting members 300 in a direction perpendicular to the light guide plate 110, and the light emitted from the light emitting members 300 is scattered by the light guide plate 110 to form a surface light source to achieve uniformity of the luminance of the backlight module. The light guide plate 110 includes a first surface, a second surface and a side surface, the first surface and the second surface are arranged opposite to each other in the thickness direction of the light guide plate 110, the side surface is connected between the first surface and the second surface, the first surface deviates from the light-emitting side of the backlight module, the second surface faces the light-emitting side of the backlight module, the light-emitting member 300 faces the first surface, the first reflection portion 200 is arranged on one side of the light guide plate 110, and light emitted by the light-emitting member 300 can be reflected into the light guide plate 110 from the side surface through the first reflection portion 200.
In a specific operation process, the light emitting member 300 emits light, and the light passes through the first surface, is reflected by the first reflecting portion 200, and enters the light guide plate 110 from the side surface of the light guide plate 110 (the propagation direction of the light is shown as X in fig. 2).
Alternatively, the light emitted from the light emitting member 300 may be vertically incident on the first surface or may be obliquely incident on the first surface. The first reflection part 200 may be parallel to the side surface, the first reflection part 200 may intersect the side surface, the first reflection part 200 and the light emitting member 300 may be disposed only to reflect light into the light guide plate 110, and the specific disposition positions of the first reflection part 200 and the light emitting member 300 are not limited herein.
In the embodiment disclosed in the present application, the light guide plate 110 and the light emitting element 300 are arranged along the thickness direction of the backlight module, and the light emitted from the light emitting element 300 passes through the first surface and is reflected by the reflective sheet to enter the light guide plate 110 from the side surface of the light guide plate 110. Compare in light-emitting member 300 and set up in the side of light guide plate 110, in the backlight unit disclosed in this application, light guide plate 110 and light-emitting member 300 superpose, and at this moment, backlight unit's black limit is the width of the marginal width of bearing frame 120 and the regional width of mixing light, and then can avoid light-emitting member 300 to the influence of black limit width for backlight unit's black limit width reduces, and then makes electronic equipment's black limit less, makes electronic equipment's screen account for than great.
In the above embodiments, the fixing member of the first reflection portion 200 may be disposed in the backlight module to fix the first reflection portion 200, however, the fixing member easily occupies the installation space of the backlight module, and further easily increases the black edge width of the backlight module. In an alternative embodiment, the first reflective portion 200 is attached to the side surface, and at this time, no fixing component is required to be disposed in the backlight module, so that the structure formed by the first reflective portion 200 and the light guide plate 110 occupies a smaller width direction of the backlight module, and further the black edge width of the backlight module is smaller, which further reduces the black edge of the electronic device. Specifically, the first reflective portion 200 may be a reflective film layer, a reflective coating layer, or a reflective plating layer disposed on the side surface.
In another alternative embodiment, at least a portion of the projection profile of the light emitting element 300 is located within the projection profile of the first reflective portion 200 in a direction perpendicular to the projection direction of the light guide plate 110, and most of the light emitted by the light emitting element 300 can enter the first reflective portion 200, so that the utilization rate of the light is improved, and the light loss of the light emitting element 300 is reduced.
In the above embodiments, the angle between the first surface and the side surface can affect the reflection angle of the light, and thus the optical performance of the light guide plate 110. In an optional embodiment, an included angle between the first surface and the side surface may be 45 °, at this time, the included angle between the first surface and the first reflection portion 200 is 45 °, in this scheme, the light emitted by the light emitting element 300 may perpendicularly enter the first surface, the first reflection portion 200 is inclined by 45 °, so that a larger portion of the light emitted by the light emitting element 300 can be reflected as parallel light, so that the light can enter the light guide plate 110 in parallel, the brightness of the light guide plate 110 is more uniform, the optical performance of the light guide plate 110 is more excellent, and further the light emitting effect of the backlight module is more excellent. Of course, the included angle between the first face and the side face may be other angles, and is not limited herein.
The backlight module disclosed in the present application may further include a carrier frame 120, the carrier frame 120 provides an installation basis for other components of the backlight module, both the light guide plate 110 and the light emitting element 300 may be disposed on the carrier frame 120, and the light emitting element 300 may be disposed between the carrier frame 120 and the light guide plate 110.
In an alternative embodiment, the carrying frame 120 may be provided with an accommodating space 121, and at least a portion of the light emitting element 300 may be located in the accommodating space 121. In this scheme, at least a portion of the light emitting element 300 may be hidden in the accommodating space 121, so that the stacking thickness of the light emitting element 300, the light guide plate 110 and the carrying frame 120 is smaller, and further the thickness of the backlight module is smaller, so that the thickness of the electronic device is smaller, and further the user experience is improved.
Alternatively, the accommodating space 121 may be an accommodating hole or an accommodating groove, and the specific structure of the accommodating space 121 is not limited herein.
The backlight module disclosed in the embodiment of the application may further include a circuit board 400, wherein the circuit board 400 is electrically connected to the light emitting element 300, so as to control the light emitting element 300 to emit light and supply power to the light emitting element 300, however, a portion of the circuit board 400 needs to be attached to the inside of the carrying frame 120, and therefore a carrying structure for attaching the circuit board 400 needs to be disposed at an edge of the carrying frame 120.
In order to further reduce the width of the black edge of the backlight module, in another alternative embodiment, the circuit board 400 may be disposed on a side of the carrying frame 120 away from the light emitting side of the light emitting element 300, the accommodating space 121 may be disposed with a first opening and a second opening that are disposed opposite to each other, the first opening is a light emitting port, the circuit board 400 covers the second opening, at this time, the accommodating space 121 is a through hole, the circuit board 400 covers the opening on the side of the through hole, the light emitting element 300 may extend out of the second opening and be connected to the circuit board 400, at this time, the circuit board 400 may be disposed on an outer side of the carrying frame 120, and then the carrying structure of the circuit board 400 inside the carrying frame 120 may be cancelled, so that the width of the edge of the carrying frame 120 is smaller, and.
In addition, the circuit board 400 is disposed outside the carrying frame 120, so that the circuit board 400 and the light emitting element 300 are conveniently connected, and further the structure of the backlight module is simple, which makes the design difficulty of the backlight module smaller.
Alternatively, in the embodiment of the present application, the circuit board 400 may be a rigid circuit board or a circuit board having flexibility. For example, the circuit board 400 may be a printed circuit board, a rigid-flex board, or the circuit board 400 includes a flexible circuit board and a stiffener that are attached to each other. Of course, other structures may be used and are not limited herein.
In the above embodiment, the bezel 120 may include a rubber frame portion and a metal frame portion, the rubber frame portion is connected to the metal frame portion, and the metal frame portion has a relatively high rigidity and may damage the circuit board 400, so that the circuit board 400 may be attached to the rubber frame portion. Alternatively, the circuit board 400 may be attached to the frame portion by a double-sided adhesive tape, although other adhesive materials may also be used, and the disclosure is not limited thereto.
In an optional embodiment, the backlight module disclosed in the embodiment of the present application may further include a light shielding portion 130, where the light shielding portion 130 is disposed around the light emitting region. The light blocking part 130 is connected to the carrier frame 120, and the light blocking part 130 covers a portion of the light guide plate 110, the light emitting member 300, and the first reflection part 200. In this embodiment, the width of the light shielding portion 130 is the width of the black edge of the backlight module, and the light shielding portion 130 is used for shielding the light emitting member 300 and the first reflecting portion 200, thereby preventing the first reflecting portion 200 and the light emitting member 300 from leaking.
The light emitted from the light emitting member 300 leaks out of the backlight module, which easily affects the display performance of the display module. Therefore, the light shielding portion 130 can also prevent light leakage of the backlight module, so that the backlight module is not easy to affect the display performance of the display module.
Alternatively, the light shielding portion 130 may be made of PET (Polyethylene terephthalate), plastic, and other materials, and of course, other light shielding materials may also be used, which is not limited herein.
In the above embodiments, light leakage is easily caused at the connection between the light shielding portion 130 and the bezel 120, and therefore, a specific structure of the light shielding portion 130 is disclosed herein, but other structures are also possible, and the disclosure is not limited herein. In an alternative embodiment, the light shielding portion 130 may include a first light shielding layer 131 and a second light shielding layer 132, the first light shielding layer 131 and the second light shielding layer 132 intersect, the first light shielding layer 131 is located on a side of the light guide plate 110 facing away from the light emitting member 300, and the second light shielding layer 132 extends from the side of the first light shielding layer 131 toward the light emitting member 300. In this embodiment, the second light-shielding layer 132 extends to the side surface of the bezel 120, and the light-shielding portion 130 is a wrapped structure, so that light is not easy to leak from the gap between the bezel 120 and the light-shielding portion 130, and the light leakage prevention performance of the backlight module is improved.
In addition, the light shielding portion 130 with such a structure can also improve the bonding strength with the carrier frame 120, so that the carrier frame 120 and the light shielding portion 130 are connected more tightly.
In another alternative embodiment, the backlight module disclosed in the embodiment of the present application may further include a brightness enhancement film 140, a diffusion film 170, and a second reflection part 150, wherein the brightness enhancement film 140, the diffusion film 170, the light guide plate 110, and the second reflection part 150 are sequentially stacked. Specifically, the second reflection part 150 may be a reflection film.
In a specific operation process, after the light enters the light guide plate 110, the light is diffused by the diffusion film 170, so that the uniformity of the light can be improved, and the brightness of the backlight module is improved after the light is brightened by the brightness enhancement film 140, so that the light emitting effect of the backlight module is better.
In addition, a part of the light in the light guide plate 110 is easy to exit the light guide plate 110 from the first surface, which may cause a low light utilization rate of the backlight module, for this reason, the first surface of the light guide plate 110 may be provided with a second reflection portion 150, and at this time, the light may be reflected back to the light guide plate 110 again, thereby improving the light utilization rate of the backlight module.
Alternatively, the brightness enhancement film 140 may generally have a two-layer structure, and the brightness enhancement film 140 may include a first brightness enhancement film 141 and a second brightness enhancement film 142, wherein the first brightness enhancement film 141, the second brightness enhancement film 142, and the diffuser film 170 are sequentially stacked.
In the above embodiment, light leakage may occur at the gap between the light shielding part 130 and the diffusion film 170, so that the performance of the backlight module is poor, in an optional embodiment, the light shielding member 160 is disposed at the edge of the diffusion film 170, the light shielding member 160, the diffusion film 170 and the light guide plate 110 are sequentially stacked, the light shielding member 160 covers the edge of the first surface close to the first reflection part 200, at this time, the light shielding member 160 is located at the gap between the diffusion film 170 and the light shielding part 130, so that the light shielding member 160 blocks part of the gap, thereby preventing light leakage at the gap between the light shielding part 130 and the diffusion film 170, and further improving the performance of the backlight module.
In another alternative embodiment, the light shielding member 160 may be a reflective sheet, and the light shielding member 160 may reflect the leaked light into the light guide plate 110.
The embodiment of the application further discloses electronic equipment, and the disclosed electronic equipment comprises a display module and the backlight module, wherein the light emitting side of the backlight module faces the display module, so that a light source is provided for the display module. The Display module may be a Liquid Crystal Display (LCD) module.
The electronic device disclosed in the embodiment of the present application may be a smart phone, a tablet computer, an electronic book reader, a wearable device (e.g., a smart watch), an electronic game machine, and the like, and the specific kind of the electronic device is not limited in the embodiment of the present application.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A backlight module is characterized by comprising a light guide plate (110), a first reflecting part (200) and a light emitting piece (300);
the light guide plate (110) and the light emitting member (300) are stacked in a direction perpendicular to the light guide plate (110), the light guide plate (110) includes a first surface, a second surface and a side surface, the first surface and the second surface are disposed opposite to each other in a thickness direction of the light guide plate (110), the side surface is connected between the first surface and the second surface, the light emitting member (300) faces the first surface, the first reflection portion (200) is disposed at one side of the light guide plate (110), and light emitted from the light emitting member (300) can be reflected from the side surface into the light guide plate (110) through the first reflection portion (200).
2. The backlight module according to claim 1, wherein the first reflective portion (200) is attached to the side surface, and at least a portion of a projection profile of the light emitting member (300) is located within a projection profile of the first reflective portion (200) in a direction perpendicular to a projection direction of the light guide plate (110).
3. A backlight module according to claim 2, wherein the angle between the first face and the side face is 45 °.
4. The backlight module according to claim 1, further comprising a carrying frame (120), wherein the light guide plate (110) and the light emitting element (300) are disposed on the carrying frame (120), the carrying frame (120) defines an accommodating space (121), and at least a portion of the light emitting element (300) is disposed in the accommodating space (121).
5. The backlight module according to claim 4, further comprising a circuit board (400), wherein the circuit board (400) is electrically connected to the light emitting element (300), the circuit board (400) is disposed on a side of the carrying frame (120) away from the light emitting side of the light emitting element (300), the accommodating space (121) is provided with a first opening and a second opening opposite to each other, the first opening is a light emitting opening, and the circuit board (400) covers the second opening.
6. The backlight module according to claim 4, further comprising a light shielding part (130), wherein the light shielding part (130) is connected to the carrier frame (120), and the light shielding part (130) covers a portion of the light guide plate (110), the light emitting member (300) and the first reflecting part (200).
7. The backlight module according to claim 6, wherein the light shielding part (130) comprises a first light shielding layer (131) and a second light shielding layer (132), the first light shielding layer (131) and the second light shielding layer (132) intersect, the first light shielding layer (131) is located on a side of the light guide plate (110) facing away from the light emitting member (300), and the second light shielding layer (132) extends from the side of the first light shielding layer (131) toward the light emitting member (300).
8. The backlight module according to claim 1, further comprising a brightness enhancement film (140), a diffusion film (170), and a second reflection part (150), wherein the brightness enhancement film (140), the diffusion film (170), the light guide plate (110), and the second reflection part (150) are sequentially stacked.
9. The backlight module as claimed in claim 8, wherein a light shielding member (160) is disposed at an edge of the diffusion film (170), the light shielding member (160), the diffusion film (170) and the light guide plate (110) are stacked in sequence, and the light shielding member (160) covers an edge of the first surface close to the first reflection portion (200).
10. An electronic device comprising a display module and the backlight module of claims 1-9, wherein the light-emitting side of the backlight module faces the display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606844.6A CN111679506A (en) | 2020-06-29 | 2020-06-29 | Backlight module and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010606844.6A CN111679506A (en) | 2020-06-29 | 2020-06-29 | Backlight module and electronic equipment |
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| CN111679506A true CN111679506A (en) | 2020-09-18 |
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| CN202010606844.6A Pending CN111679506A (en) | 2020-06-29 | 2020-06-29 | Backlight module and electronic equipment |
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| CN109613754A (en) * | 2018-12-28 | 2019-04-12 | 厦门天马微电子有限公司 | Backlight module and display device |
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