CN112180640A - Backlight module and manufacturing method of light guide film - Google Patents
Backlight module and manufacturing method of light guide film Download PDFInfo
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- CN112180640A CN112180640A CN202011109446.XA CN202011109446A CN112180640A CN 112180640 A CN112180640 A CN 112180640A CN 202011109446 A CN202011109446 A CN 202011109446A CN 112180640 A CN112180640 A CN 112180640A
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- light
- film
- backlight module
- light guide
- guiding film
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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
- 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
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
-
- 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
Abstract
A backlight module includes a light guide film, an optical structure layer and a plurality of light sources. The light guide film has a light emitting surface, a first side and a second side, the first side and the second side of the light guide film are opposite to each other, the light emitting surface of the light guide film is connected between the first side and the second side, the first side of the light guide film has surface roughness, and the range of the surface roughness is between about SA0.06 and about SA 0.075. The optical structure layer is arranged on the light emergent surface. The light emitting source is located on the first side of the light guide film and configured to emit light rays towards the second side through the first side of the light guide film, and the light rays entering the light guide film emit to the optical structure layer through the light emitting surface. The backlight module can make the brightness of the edge display area more uniform, thereby improving the quality of the brightness provided by the backlight module.
Description
Technical Field
The invention relates to a backlight module and a manufacturing method of a light guide film used in the backlight module.
Background
With the increasing living standard of people, the application of electronic products has become an integral part of life, and among them, electronic products with display function are becoming more and more popular. In contrast, with the technology changing day by day, the demand and the expectation of electronic products are higher and higher.
Therefore, it is an important development direction for manufacturers to improve the quality of electronic products in addition to reducing the production cost of the electronic products.
Disclosure of Invention
An objective of the present invention is to provide a backlight module, which can make the brightness of the edge display region more uniform, thereby improving the quality of the brightness provided by the backlight module.
According to an embodiment of the present invention, a backlight module includes a light guiding film, an optical structure layer, and a plurality of light sources. The light guide film has a light emitting surface, a first side and a second side, the first side and the second side of the light guide film are opposite to each other, the light emitting surface of the light guide film is connected between the first side and the second side, the first side of the light guide film has surface roughness, and the range of the surface roughness is between about SA0.06 and about SA 0.075. The optical structure layer is arranged on the light emergent surface of the light guide film. The light emitting source is located on the first side of the light guide film and configured to emit light rays towards the second side through the first side of the light guide film, and the light rays entering the light guide film emit to the optical structure layer through the light emitting surface.
In one or more embodiments of the present invention, the light source is a light emitting diode.
In one or more embodiments of the present invention, the light guiding film has a plurality of micro-structures, the micro-structures are formed on the first side, and the micro-structures define a surface roughness.
In one or more embodiments of the present invention, the micro-structure is at least partially a protruding structure.
In one or more embodiments of the present invention, the micro-structure is at least partially a recessed structure.
In one or more embodiments of the present invention, the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light emitting surface of the light guiding film, and the first side and the second side of the light guiding film are respectively connected to the corresponding long sides.
In one or more embodiments of the present invention, the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light emitting surface of the light guiding film, and the first side and the second side of the light guiding film are respectively connected to the corresponding short sides.
One objective of the present invention is to manufacture a light guiding film, which can make the brightness of the edge display region of the backlight module more uniform, thereby improving the quality of the brightness provided by the backlight module.
According to an embodiment of the present invention, a method for manufacturing a light guide film includes: (1) providing a light guide film, wherein the light guide film is provided with a light emitting surface, a first side and a second side, the first side and the second side of the light guide film are opposite to each other, the light emitting surface of the light guide film is connected between the first side and the second side, and the first side of the light guide film is configured to allow light rays to pass through and to be emitted into the light guide film; and (2) cutting and polishing the first side of the light directing film to provide the first side of the light directing film with a face roughness in a range between about SA0.06 and about SA 0.075.
In one or more embodiments of the present invention, the step of cutting and polishing the first side of the light guiding film comprises: a plurality of microstructures are formed on the first side of the light guide film, and the microstructures define the surface roughness of the first side of the light guide film.
In one or more embodiments of the present invention, the micro-structure is at least partially a protruding structure.
In one or more embodiments of the present invention, the micro-structure is at least partially a recessed structure.
In one or more embodiments of the present invention, the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light emitting surface of the light guiding film, and the first side and the second side of the light guiding film are respectively connected to the corresponding long sides.
In one or more embodiments of the present invention, the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light emitting surface of the light guiding film, and the first side and the second side of the light guiding film are respectively connected to the corresponding short sides.
The above embodiments of the invention have at least the following advantages:
(1) the first side of the light guiding film has a surface roughness ranging between about SA0.06 and about SA 0.075, so that when the light emitted from the light source passes through the first side of the light guiding film, the light can be refracted more, and the uniformity of the light entering the light guiding film can be improved. Therefore, the brightness provided by the light in the edge display area can be more uniform, namely, the quality of the brightness provided by the backlight module is improved.
(2) According to the actual situation, the user can choose to cut and polish the side of the light guiding film connected with the long edge to achieve a surface roughness ranging between about SA0.06 and about SA 0.075, or the user can choose to cut and polish the side of the light guiding film connected with the short edge to achieve a surface roughness ranging between about SA0.06 and about SA 0.075. Therefore, the method for processing the light guide film by the manufacturing method has considerable flexibility.
Drawings
FIG. 1 is a schematic cross-sectional view illustrating a backlight module according to an embodiment of the invention.
Fig. 2 is a schematic cross-sectional view taken along line a-a of fig. 1.
Fig. 3 is a schematic side view illustrating an application of the backlight module shown in fig. 1.
Fig. 4 is a partially enlarged view illustrating a range B of fig. 2, in which the microstructure is a protruding structure.
Fig. 5 is a partially enlarged view of the range B of fig. 2, wherein the microstructure is a recessed structure.
Fig. 6 is a partially enlarged view of the area B of fig. 2, in which a portion of the microstructures are protruded structures, and a portion of the microstructures are recessed structures.
FIG. 7 is a flowchart illustrating a method of manufacturing a light guiding film according to an embodiment of the present invention.
FIG. 8 is a top view of the light directing film of FIG. 1 during processing.
FIG. 9 is a top view of a light guiding film and a light source according to another embodiment of the present invention.
Reference numerals:
100 backlight module 110 light guide film
111: first side 112: second side
113 light exit surface 114 microstructure
114a, convex structures 114b, concave structures
115 long side 116 short side
120 optical structure layer 130 light emitting source
300 polishing machine 310 working platform
320, stop 330, polishing tool bit
340 sliding rail 500 and manufacturing method
510 to 520,521, step A-A, line segment
B range DW machine direction
EA effective display area EE edge display area
X is distance
Detailed Description
In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, for the sake of simplicity, certain conventional structures and elements are shown in simplified schematic form in the drawings, and the same reference numerals will be used to refer to the same or like elements throughout the drawings. And features of different embodiments may be applied interchangeably, if possible.
Unless defined otherwise, all words (including technical and scientific terms) used herein have their ordinary meaning as is understood by those skilled in the art. Furthermore, the definitions of the above-mentioned words and phrases in general and in common use throughout this specification should be read in a manner consistent with the context of the present invention. Unless specifically defined otherwise, these terms are not to be interpreted in an idealized or overly formal sense.
Please refer to fig. 1-2. FIG. 1 is a schematic cross-sectional view illustrating a backlight module 100 according to an embodiment of the invention. Fig. 2 is a schematic cross-sectional view taken along line a-a of fig. 1. In the present embodiment, as shown in fig. 1-2, the backlight module 100 includes a light guiding film 110, an optical structure layer 120, and a plurality of light sources 130. The light guide film 110 has a light exit surface 113, a first side 111 and a second side 112, the first side 111 and the second side 112 of the light guide film 110 are opposite to each other, and the light exit surface 113 of the light guide film 110 is connected between the first side 111 and the second side 112. The optical structure layer 120 is disposed on the light exit surface 113 of the light guide film 110. The light source 130 is located on the first side 111 of the light guiding film 110 and configured to emit light through the first side 111 of the light guiding film 110 toward the second side 112, that is, the light source 130 is configured to emit light into the light guiding film 110 through the first side 111 of the light guiding film 110, and after the light enters the light guiding film 110, at least a portion of the light exits the light guiding film 110 through the light exit surface 113 of the light guiding film 110 and is emitted to the optical structure layer 120, so that the light guiding film 110 can provide brightness to the optical structure layer 120. In practical applications, the Light emitting source 130 may be a Light Emitting Diode (LED), but the invention is not limited thereto.
Please refer to fig. 3. Fig. 3 is a schematic side view illustrating an application of the backlight module 100 of fig. 1. In practical applications, as shown in fig. 3, the backlight module 100 has an effective display area EA. Specifically, the effective display area EA is located on the brightness display surface of the optical structure layer 120 away from the light guide film 110. More specifically, the effective display area EA has a distance X from the first side 111 in the arrangement direction of the first side 111 and the second side 112.
Furthermore, as shown in fig. 3, the effective display area EA of the backlight module 100 is divided into 16 equal parts on average, and a part closest to the light source 130 is named as the edge display area EE for illustration. It is noted that, in the present embodiment, the first side 111 of the light guiding film 110 has a surface roughness, and the surface roughness ranges from about SA0.06 to about SA 0.075, so that when the light emitted from the light source 130 passes through the first side 111 of the light guiding film 110, the light can be more refracted, and the uniformity of the light entering the light guiding film 110 can be improved. Therefore, the brightness provided by the light in the edge display area EE can be more uniform, i.e. the quality of the brightness provided by the backlight module 100 is also improved. For example, the difference between the brightest luminance and the darkest luminance of the edge display area EE may be less than 18.9.
In practical applications, for example, the surface roughness of the first side 111 of the light guiding film 110 may be SA 0.060, SA 0.061, SA 0.062, SA 0.063, SA 0.064, SA 0.065, SA 0.066, SA 0.067, SA 0.068, SA 0.069, SA 0.070, SA 0.071, SA 0.072, SA 0.073, SA 0.074, or SA 0.075, but the invention is not limited thereto.
Further, the surface roughness represents the arithmetic mean deviation of the area topography and is used to characterize the roughness of the two-dimensional profile of the object surface, and the calculation formula of the surface roughness is as follows:
wherein Sa is a roughness evaluation parameter based on the area morphology, Z is the distance from a point on the contour of the surface area of the object to a reference plane, and M, N are the number of sampling points in two directions perpendicular to each other in the evaluation area respectively.
Please refer to fig. 4. Fig. 4 is a partially enlarged view of the range B in fig. 2, wherein the microstructure 114 is a protruding structure 114 a. In the present embodiment, the light guiding film 110 has a plurality of microstructures 114, the microstructures 114 are formed on the first side 111, and the size of the microstructures 114 is measured in microns to define the surface roughness. For example, as shown in fig. 4, at least a portion of the microstructure 114 is a protrusion structure 114a to refract the light emitted from the light source 130 and passing through the first side 111, but the invention is not limited thereto.
Please refer to fig. 5. Fig. 5 is a partially enlarged view of the range B in fig. 2, wherein the microstructure 114 is a recessed structure 114B. In the present embodiment, as shown in fig. 5, at least a portion of the microstructure 114 of the light guiding film 110 may be a concave structure 114b according to actual conditions to refract the light emitted from the light emitting source 130 and passing through the first side 111, but the invention is not limited thereto.
Please refer to fig. 6. Fig. 6 is a partially enlarged view of the area B of fig. 2, in which a portion of the microstructure 114 is a protruding structure 114a, and a portion of the microstructure 114 is a recessed structure 114B. According to the actual situation, as shown in fig. 6, a portion of the micro-structures 114 may be the protruding structures 114a, and a portion of the micro-structures 114 may be the recessed structures 114b, so as to refract the light emitted from the light source 130 and passing through the first side 111, but the invention is not limited thereto.
Please refer to fig. 7. FIG. 7 is a flowchart illustrating a method 500 of manufacturing a light guiding film 110 according to an embodiment of the invention. In this embodiment, as shown in fig. 7, the manufacturing method 500 comprises the following steps (it should be understood that the steps mentioned in some embodiments, except the sequence specifically mentioned, can be performed in a sequence before and after the steps, or even simultaneously or partially simultaneously, according to actual needs):
(1) providing the light guiding film 110, as mentioned above, the light guiding film 110 has the light emitting surface 113, the first side 111 and the second side 112 of the light guiding film 110 are opposite to each other, the light emitting surface 113 of the light guiding film 110 is connected between the first side 111 and the second side 112, and the first side 111 of the light guiding film 110 is configured to allow the light to pass through and enter the light guiding film 110 (step 510).
(2) First side 111 of light directing film 110 is cut and polished to provide first side 111 of light directing film 110 with a face roughness in a range between about SA0.06 and about SA 0.075, as described above (step 520).
Please refer to fig. 8. Fig. 8 is a top view illustrating a process of manufacturing the light guiding film 110 of fig. 1. In a practical application, a user may perform a cutting and polishing process on the light guiding film 110 using the polishing machine 300, for example. In general, as shown in FIG. 8, the polisher 300 includes a work platform 310, a stop 320, a polishing head 330, and a slide 340. The platform 310 is used for supporting the light guide film 110, and the stopper 320 is located on the platform 310 and is used for fixing the position of the light guide film 110 relative to the platform 310. The work platform 310 together with the stopper 320 is movable on the slide rails 340 in the machine direction DW. Correspondingly, the burnishing head 330 is stationary relative to the slide 340.
Specifically, as shown in fig. 8, in the processing process of the light guiding film 110, the light guiding film 110 may be disposed on a working platform 310 of a polishing machine 300, two opposite sides of the light guiding film 110 are fixed along a processing direction DW by a stopper 320 of the polishing machine 300, and a user may abut a polishing tool bit 330 of the polishing machine 300 against one side of the light guiding film 110 parallel to the processing direction DW, and slide the working platform 310 along a slide rail 340 parallel to the processing direction DW relative to the polishing tool bit 330, so that the polishing tool bit 330 moves relative to one side of the light guiding film 110, thereby cutting and polishing one side of the light guiding film 110. In practical applications, depending on the characteristics of different surface roughness of first side 111 of light directing film 110, for example, to achieve a specific surface roughness of first side 111 of light directing film 110 in SA 0.060, SA 0.061, SA 0.062, SA 0.063, SA 0.064, SA 0.065, SA 0.066, SA 0.067, SA 0.068, SA 0.069, SA 0.070, SA 0.071, SA 0.072, SA 0.073, SA 0.074, or SA 0.075, a user may select a suitable polishing tool tip 330. After one side (e.g., the first side 111) of the light guide film 110 is finished, the user may rotate the placing direction of the light guide film 110 by 90 degrees with respect to the working platform 310 of the polishing machine 300 in sequence and adjust the position of the polishing tool bit 330, so as to cut and polish the remaining three sides of the light guide film 110 one by one according to the above-mentioned operation process, so as to remove burrs or edge scraps located on the remaining three sides of the light guide film 110.
Further, the step of cutting and polishing the first side 111 of the light guiding film 110 (i.e., step 520) further comprises: a plurality of microstructures 114 are formed on the first side 111 of the light guiding film 110 (step 521). More specifically, the size of the microstructures 114 is in microns and defines the surface roughness of the first side 111. As described above, the micro-structures 114 may be at least partially protruding structures 114a (as shown in fig. 4), or at least partially recessed structures 114b (as shown in fig. 5), or, according to the actual situation, a portion of the micro-structures 114 may be protruding structures 114a, and a portion of the micro-structures 114 may be recessed structures 114b (as shown in fig. 6), so as to better refract the light passing through the first side 111, but the invention is not limited thereto.
In addition, please refer back to FIG. 2. In this embodiment, the processed light guiding film 110 has two opposite long sides 115 and two opposite short sides 116, and the long sides 115 and the short sides 116 are connected to each other to define the light emitting surface 113 of the light guiding film 110. In other words, the light guiding film 110 is substantially rectangular. In the present embodiment, the first side 111 and the second side 112 of the light guiding film 110 are connected to the corresponding long sides 115. That is, the first side 111 with a surface roughness between about SA0.06 and about SA 0.075 is connected to the long side 115, and the light emitting source 130 is also located on the long side 115 of the light guiding film 110, that is, the light emitting source 130 corresponds to the long side 115 of the light guiding film 110 in position, but the invention is not limited thereto.
Please refer to fig. 9. FIG. 9 is a top view of a light guiding film 110 and a light source 130 according to another embodiment of the invention. In practical applications, as shown in fig. 9, the light guiding film 110 is substantially rectangular, and the first side 111 and the second side 112 of the light guiding film 110 are respectively connected to the corresponding short edges 116. That is, according to the actual situation, the first side 111 with the surface roughness between about SA0.06 and about SA 0.075 is connected to the short side 116, and the light emitting source 130 is also located on the short side 116 of the light guiding film 110, that is, the light emitting source 130 corresponds to the short side 116 of the light guiding film 110 in position, but the invention is not limited thereto. Thus, according to the actual situation, the user can choose to cut and polish the side of light guiding film 110 connected to long side 115 to achieve a surface roughness in the range between about SA0.06 and about SA 0.075, or the user can choose to cut and polish the side of light guiding film 110 connected to short side 116 to achieve a surface roughness in the range between about SA0.06 and about SA 0.075. Therefore, the method of manufacturing the light guide film 110 by the method 500 has considerable flexibility.
In summary, the technical solutions disclosed in the above embodiments of the present invention have at least the following advantages:
(1) the first side of the light guiding film has a surface roughness ranging between about SA0.06 and about SA 0.075, so that when the light emitted from the light source passes through the first side of the light guiding film, the light can be refracted more, and the uniformity of the light entering the light guiding film can be improved. Therefore, the brightness provided by the light in the edge display area can be more uniform, namely, the quality of the brightness provided by the backlight module is improved.
(2) According to the actual situation, the user can choose to cut and polish the side of the light guiding film connected with the long edge to achieve a surface roughness ranging between about SA0.06 and about SA 0.075, or the user can choose to cut and polish the side of the light guiding film connected with the short edge to achieve a surface roughness ranging between about SA0.06 and about SA 0.075. Therefore, the method for processing the light guide film by the manufacturing method has considerable flexibility.
Claims (13)
1. A backlight module, comprising:
a light directing film having a light exit surface, a first side and a second side, the first side and the second side opposing each other, the light exit surface connected between the first side and the second side, the first side having a surface roughness, the surface roughness ranging between SA0.06 and SA 0.075;
the optical structure layer is arranged on the light emergent surface; and
and the plurality of light emitting sources are positioned on the first side and are configured to emit light rays towards the second side through the first side, and the light rays entering the light guide film are emitted to the optical structure layer through the light emitting surface.
2. The backlight module of claim 1, wherein the light sources are light emitting diodes.
3. The backlight module of claim 1, wherein the light guiding film has a plurality of micro-structures formed on the first side, the micro-structures defining the surface roughness.
4. The backlight module of claim 3, wherein the micro-structures are at least partially protruding structures.
5. The backlight module of claim 3, wherein the micro-structures are at least partially recessed structures.
6. The backlight module of claim 1, wherein the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light exit surface, and the first side and the second side are respectively connected to the corresponding long sides.
7. The backlight module of claim 1, wherein the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light exit surface, and the first side and the second side are respectively connected to the corresponding short sides.
8. A method of making a light directing film, comprising:
providing a light guide film, wherein the light guide film is provided with a light emitting surface, a first side and a second side, the first side and the second side are opposite to each other, the light emitting surface is connected between the first side and the second side, and the first side is configured to allow light rays to pass through and enter the light guide film; and
subjecting the first side to a cutting and polishing process to provide the first side with a face roughness in a range between SA0.06 and SA 0.075.
9. The method of claim 8, wherein cutting and polishing the first side comprises:
forming a plurality of microstructures on the first side, the microstructures defining the surface roughness.
10. The method of claim 9, wherein the microstructures are at least partially protruding structures.
11. The method of claim 9, wherein the microstructures are at least partially recessed structures.
12. The method of claim 8, wherein the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light exit surface, and the first side and the second side are respectively connected to the corresponding long sides.
13. The method of claim 8, wherein the light guiding film has two opposite long sides and two opposite short sides, the long sides and the short sides are connected to each other to define the light exit surface, and the first side and the second side are respectively connected to the corresponding short sides.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011109446.XA CN112180640A (en) | 2020-10-16 | 2020-10-16 | Backlight module and manufacturing method of light guide film |
| TW109136978A TWI747573B (en) | 2020-10-16 | 2020-10-23 | Backlight module and manufacturing method of light guiding film |
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| CN202011109446.XA CN112180640A (en) | 2020-10-16 | 2020-10-16 | Backlight module and manufacturing method of light guide film |
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| CN112180640A true CN112180640A (en) | 2021-01-05 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112946811A (en) * | 2021-02-04 | 2021-06-11 | 东莞市元立电子科技有限公司 | Light guide plate and full-automatic numerical control optical edge polishing process thereof |
| CN115431155A (en) * | 2022-09-16 | 2022-12-06 | 星源电子科技(深圳)有限公司 | Method for solving problem of yellowing of light inlet side of backlight source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112946811A (en) * | 2021-02-04 | 2021-06-11 | 东莞市元立电子科技有限公司 | Light guide plate and full-automatic numerical control optical edge polishing process thereof |
| CN115431155A (en) * | 2022-09-16 | 2022-12-06 | 星源电子科技(深圳)有限公司 | Method for solving problem of yellowing of light inlet side of backlight source |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202217374A (en) | 2022-05-01 |
| TWI747573B (en) | 2021-11-21 |
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