CN110542945B - Backlight module - Google Patents
Backlight module Download PDFInfo
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- CN110542945B CN110542945B CN201910837188.8A CN201910837188A CN110542945B CN 110542945 B CN110542945 B CN 110542945B CN 201910837188 A CN201910837188 A CN 201910837188A CN 110542945 B CN110542945 B CN 110542945B
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- 239000002096 quantum dot Substances 0.000 claims description 13
- 230000000007 visual effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 230000008901 benefit Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- KJLLKLRVCJAFRY-UHFFFAOYSA-N mebutizide Chemical compound ClC1=C(S(N)(=O)=O)C=C2S(=O)(=O)NC(C(C)C(C)CC)NC2=C1 KJLLKLRVCJAFRY-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000016776 visual perception Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0055—Reflecting element, sheet or layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0073—Light emitting diode [LED]
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- G—PHYSICS
- G02—OPTICS
- 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
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/009—Positioning aspects of the light source in the package
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Planar Illumination Modules (AREA)
Abstract
A backlight module comprises a light guide plate, a plurality of single-side light-emitting lamp sources and a plurality of multi-side light-emitting lamp sources. The single-side light emitting lamp source is positioned at the light incident side of the light guide plate. The multi-surface light-emitting lamp source is positioned on the light incident side of the light guide plate, and the multi-surface light-emitting lamp source is positioned between the two single-surface light-emitting lamp sources. By arranging the multi-surface light-emitting lamp source between the two single-surface light-emitting lamp sources, the problem of interference of point light sources caused by size limit of a microstructure for scattering light or poor arrangement precision of the traditional LED can be solved, and the backlight module can be applied to a display with a thinned non-display area and provides a good visual effect.
Description
Technical Field
The invention relates to the field of display, in particular to a backlight module.
Background
Because the LED has bright luminance and smaller integral volume, the LED has great benefit for the ultra-thinning of 3C products. However, the LED is a point-shaped light source, and in order to uniformly disperse light, a microstructure, such as a corner post structure or a prism structure, is disposed on the surface of the light guide plate corresponding to the LED, so as to uniformly disperse the light, thereby achieving the effect of a surface light source.
With the design of the display, it is desirable to fully utilize the utilization of the panel to increase the ratio of the display area, and at this time, the non-display area around the display area, such as the frame, must be reduced in area, so that the backlight module must be thinner in design. However, the process of the microstructure faces the limit of the size, and the distance between the light guide plate and the light source is at least more than 4 mm. In addition, if the microstructure is omitted and another structure capable of scattering is used, the problem of optical interference fringes (mura) is easily caused, the visual effect is greatly influenced, and the standard of delivery is difficult to achieve.
In addition, in order to reduce the influence of the microstructure, there is a way to solve the problem of light interference by using a design in which two LEDs are arranged side by side in the prior art. However, the point light sources need to be arranged in a straight line to show the effect of a line light source, and then the technical effect of a surface light source is achieved through the light guide plate. However, when the LED is electrically connected to the circuit board by mounting the LED die on the driving circuit and the circuit board by matching with the mounting technique, the LED is likely to be deviated from the driving circuit, and the actual effect cannot be expected due to the limitation of the mounting accuracy.
Disclosure of Invention
Accordingly, a backlight module is provided. The backlight module comprises a light guide plate, a plurality of single-side light-emitting lamp sources and a plurality of multi-side light-emitting lamp sources. The single-side light emitting lamp source is positioned at the light incident side of the light guide plate. The multi-surface light-emitting lamp source is positioned on the light incident side of the light guide plate, and the multi-surface light-emitting lamp source is positioned between the two single-surface light-emitting lamp sources.
In some embodiments, the multi-sided light source is smaller in size than the single-sided light source.
In some embodiments, the backlight module further includes a flexible circuit board, and the single-sided light emitting lamp source and the multi-sided light emitting lamp source are disposed on the same surface of the flexible circuit board.
In some embodiments, the light incident side of the light guide plate includes a light incident surface and a plurality of extended light guide blocks, the extended light guide plates extend from the light incident surface, and the extended light guide blocks respectively correspond to the multi-surface light emitting lamp sources.
In some embodiments, the light guide block includes a bottom surface and an inclined surface, the bottom surface is substantially perpendicular to the light incident surface and faces the main light emitting surface of the multi-light emitting lamp source, and the inclined surface extends obliquely from the light incident surface to the bottom surface. Furthermore, in some embodiments, the backlight module further comprises a reflective sheet, wherein the reflective sheet is in contact with the light guide plate and the single-sided light emitting lamp source. And the flexible circuit board and the reflector plate are positioned on two opposite surfaces of the light guide plate and the single-side light-emitting lamp source. Still further, in some embodiments, the reflective sheet is further attached to the inclined surface. In some embodiments, the reflective sheet covers a base surface of the light guide plate, the base surface corresponding to a light exit side of the light guide plate. In other embodiments, the reflector plate is disposed on a portion of the light-emitting side of the light guide plate and shields the multi-surface light-emitting lamp source.
In some embodiments, a light-emitting surface of the single-sided light-emitting light source faces the light-entering surface, and a first normal direction of the light-emitting surface is substantially orthogonal to a second normal direction of the main light-emitting surface of each multi-sided light-emitting light source.
In some embodiments, the single-sided light-emitting light source and the multi-sided light-emitting light source are blue LEDs, and quantum dot films are further disposed on the light-incident surface and the bottom surface, respectively, and the blue light emitted by the single-sided light-emitting light source and the multi-sided light-emitting light source excites a plurality of quantum dots in the quantum dot films to be white light.
In some embodiments, a plurality of light guide microstructures are further disposed on the light incident surface.
In some embodiments, the spacing between the multiple light sources is 2.1 to 5.5 mm.
In summary, the multi-surface light emitting lamp source is disposed between the two single-surface light emitting lamp sources, so that the problem caused by the design of thinning the non-display area of the display due to the size limit of the micro-structure for diffusing light or the poor arrangement precision of the conventional LED is solved. And further can be applied to the design of thinning the non-display area of the display to provide good visual perception.
The detailed features and advantages of the present invention are described in detail in the following embodiments, which are sufficient for anyone skilled in the art to understand the technical contents of the present invention and to implement the present invention, and the objectives and advantages related to the present invention can be easily understood by anyone skilled in the art according to the disclosure of the present specification, the claims and the attached drawings.
Drawings
Fig. 1 is a partial top view of a backlight module according to a first embodiment.
Fig. 2 is a partial top view of a backlight module of a second embodiment.
Fig. 3A is a schematic cross-sectional view taken along line a-a of fig. 2.
Fig. 3B is a cross-sectional view taken along line B-B of fig. 2.
FIG. 3C is a cross-sectional view of the third embodiment taken along line B-B of FIG. 2.
Fig. 4 is a partial top view of a backlight module of a fourth embodiment.
FIG. 5A is a cross-sectional view of the fourth embodiment taken along the line A-A in FIG. 4.
FIG. 5B is a cross-sectional view of the fourth embodiment taken along line B-B of FIG. 4.
Fig. 6A is an enlarged cross-sectional view of the fifth embodiment taken along line a-a of fig. 2.
Fig. 6B is an enlarged cross-sectional view of the fifth embodiment taken along the line B-B of fig. 2.
Fig. 7 is an enlarged sectional view of the sixth embodiment taken along the line a-a of fig. 2.
Description of reference numerals:
1 backlight module 10 light guide plate
11 incident light side 111 incident light surface
13 light-emitting side 15 extending light guide block
151 bottom surface 153 slope
155 side 17 base plane
20 single-side light-emitting lamp source 205 light-emitting surface
21 luminous source 23 packaging body
30 multi-surface light emitting lamp source 305 main light emitting surface
40 flexible circuit board 50 reflector plate
60 Quantum dot film 61 Quantum dots
70 light guiding microstructure D1 first normal direction
D2 second normal direction D spacing
Detailed Description
In the drawings, the widths of some of the elements, regions, etc. are exaggerated for clarity. Like reference numerals refer to like elements throughout the specification. It will be understood that when an element such as it is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present.
It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, or sections, these elements, components, regions, and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, or section from another element, component, region, layer, or section. Thus, a "first element," "component," "region," or "portion" discussed below could be termed a second element, component, region, or portion without departing from the teachings herein.
Furthermore, relative terms, such as "lower" or "bottom" and "upper" or "top," may be used herein to describe one element's relationship to another element, as illustrated. It will be understood that relative terms are intended to encompass different orientations of the device in addition to the orientation depicted in the figures. For example, if the device in one of the figures is turned over, elements described as being on the "lower" side of other elements would then be oriented on "upper" sides of the other elements. Thus, the exemplary term "lower" can include both an orientation of "lower" and "upper," depending on the particular orientation of the figure. Similarly, if the device in one of the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "below" or "beneath" can encompass both an orientation of above and below.
Fig. 1 is a partial top view of the backlight module of the first embodiment (the reflective sheet 50 is omitted to describe the relative position). As shown in fig. 1, the backlight module 1 of the first embodiment includes a light guide plate 10, a plurality of single-side light emitting lamp sources 20, and a plurality of multi-side light emitting lamp sources 30. The single-side light emitting lamp source 20 is located at the light incident side 11 of the light guide plate 10. The multiple multi-surface light emitting lamp sources 30 are located on the light incident side 11 of the light guide plate 10, and each multi-surface light emitting lamp source 30 is located between two single-surface light emitting lamp sources 20. Here, the light source may be a Light Emitting Diode (LED).
The multi-sided light source 30 is smaller in size than the single-sided light source 20. For example, the diameter of the single-side light emitting lamp source 20 is 1.5 to 4.2mm, and the dimension of the multi-side light emitting lamp source 30 is less than or equal to 20% of the single-side light emitting lamp source 20. In addition, the single-side light emitting lamp source 20 and the multiple multi-side light emitting lamp sources 30 may be arranged in a zigzag manner, and the single-side light emitting lamp source 20 and the multi-side light emitting lamp sources 30 are not on the same horizontal line. However, this is merely an example, and is not limited thereto.
In addition, referring again to fig. 1, the distance d between the multi-surface light emitting lamp sources 30 is 2.1 to 5.5 mm. In more detail, the spacing d is the distance from the center point of only one of the multi-faceted light sources 30 to the center point of the other multi-faceted light source 30.
In addition, as shown in fig. 1, the backlight module further includes a flexible circuit board 40, and the single-sided light-emitting lamp source 20 and the multi-sided light-emitting lamp source 30 are disposed on a same surface, for example, an upper surface or a lower surface, of the flexible circuit board 40. In addition, the single-side light emitting lamp source 20 and the multi-side light emitting lamp source 30 are located on the same side of the light guide plate 10, i.e. the light incident side 11. Generally, the multi-surface light-emitting lamp source 30 is a point light source with a plurality of light-emitting directions, and the multi-surface light-emitting lamp source 30 is located between two single-surface light-emitting lamp sources 20; therefore, the multi-surface light emitting lamp source 30 can achieve the technical effect of compensating the single-surface light emitting lamp source 20 by emitting light in different directions, so that the light emitted by the whole backlight module 1 has the effect of a surface light source.
Fig. 2 is a partial top view of the backlight module of the second embodiment (the reflective sheet 50 is omitted to describe the relative position). Fig. 3A is a schematic cross-sectional view taken along line a-a of fig. 2. Fig. 3B is a cross-sectional view taken along line B-B of fig. 2. In fig. 2, the reflection sheet 50 covering the plurality of single-sided light emitting lamp sources 20, the plurality of multi-sided light emitting lamp sources 30, and the flexible circuit board 40 is omitted to describe the relative position relationship. As shown in fig. 2, fig. 3A and fig. 3B, the backlight module 1 of the second embodiment includes a light guide plate 10, a plurality of single-sided light emitting lamp sources 20, a plurality of multi-sided light emitting lamp sources 30, and a flexible circuit board 40. Different from the first embodiment, the light incident side 11 of the light guide plate 10 has a light incident surface 111 and a plurality of light guide blocks 15, the light guide blocks 15 extend from the light incident surface 111, and the light guide blocks 15 respectively correspond to the multi-surface light emitting lamp 30. The light guide block 15 may be a square block and has a bottom surface 151. As shown in fig. 3B, a gap is formed between the bottom surface 151 and the flexible circuit board 40, the multi-surface light-emitting lamp source 30 is located in the gap, the bottom surface 151 corresponds to the main light-emitting surface 305 of the multi-surface light-emitting lamp source 30, and the light generated by the multi-surface light-emitting lamp source 30 mainly exits from the main light-emitting surface 305 and enters the bottom surface 151, and then enters the light guide plate 10 through the extending light guide block 15 to be guided to a specific direction.
Generally, the height of the multi-side light-emitting lamp source 30 is lower than that of the single-side light-emitting lamp source 20, and the main light-emitting surface 305 of the multi-side light-emitting lamp source 30 is different from the direction of the light-emitting surface 205 of the single-side light-emitting lamp source 20. Therefore, the extended light guide block 15 has a height compensation effect to maintain the distance between the main light emitting surface 305 and the bottom surface 151 less than or equal to the distance between the light emitting surface 205 and the light incident surface 111.
In addition, the single-side light-emitting lamp source 20 includes a light-emitting source 21 and a package 23, and the package 23 may be a reflective cover, which can reflect and collect the light emitted from the light-emitting source 21 to emit light from the light-emitting surface 205, and is configured to guide the light into the light guide plate 10, so that the light is guided to a specific direction, for example, a viewing direction of a user. In addition, the multi-surface light-emitting lamp source 30 may be a Chip Scale Package (CSP) LED, which has no reflective cover, so that the multi-surface light-emitting lamp source 30 has multiple light-emitting directions, but has the strongest light-emitting intensity from the main light-emitting surface 305.
As shown in fig. 3A and 3B, it can be understood that the light-emitting surface 205 of the single-sided light-emitting lamp source 20 faces the light-entering surface 111, and the light-emitting surface 205 corresponds to the bottom surface 151, so that the first normal direction D1 of the light-emitting surface 205 of the single-sided light-emitting lamp source 20 is substantially orthogonal to the second normal direction D2 of the main light-emitting surface 305 of the multi-sided light-emitting lamp source 30. In other words, in fig. 2, the first normal direction D1 may be a direction from bottom to top, and the second normal direction D2 may be a direction out of the paper, and substantially orthogonal, meaning that there may be some slight angular difference from orthogonal (90 degrees), for example, plus or minus ten degrees.
FIG. 3C is a cross-sectional view of the third embodiment taken along line B-B of FIG. 2. The third embodiment is different from the second embodiment in the shape of the light guide extension block 15, and the structure of the surface on the line a-a is substantially the same, and will not be described herein again. As shown in fig. 3C, in the third embodiment, the light guide extension block 15 includes a bottom surface 151 and an inclined surface 153, the bottom surface 151 is substantially perpendicular to the light incident surface 111 and faces the main light emitting surface 305 of the multi-surface light source 30, and the inclined surface 153 extends obliquely from the light incident surface 111 to the bottom surface 151. Therefore, the light entering the light guide block 15 from the multi-surface light source 30 is reflected or refracted by the inclined surface 153 and guided to the light incident surface 111.
Referring to fig. 3A, fig. 3B and fig. 3C again, in the second and third embodiments, the backlight module 1 further includes a reflective sheet 50, and the reflective sheet 50 is in contact with a portion of the light guide plate 10 and the single-sided light emitting lamp source 20. Here, a surface of the light guide plate 10 facing the second normal direction D2 is defined as a light exit side 13. The flexible circuit board 40 and the reflective sheet 50 are disposed on opposite surfaces of the single-sided light emitting lamp source 20. Further, as shown in fig. 3B, the reflective sheet 50 is positioned on a portion of the light exit side 13 of the light guide plate 10, and a portion of the light guide plate 10 is positioned on the flexible circuit board 40. The reflective sheet 50 may be in a strip shape, and covers the multi-surface light emitting lamp source 30, and the flexible circuit board 40, the multi-surface light emitting lamp source 30, the light guide plate 10 and the reflective sheet 50 are stacked from bottom to top in an area corresponding to the multi-surface light emitting lamp source 30. Further, the reflective sheet 50 is further attached to the side surface 155 of the extended light guide block 15. As shown in fig. 3C, the light guide extension block 15 is further attached to the inclined surface 153 of the light guide extension block 15. The reflective sheet 50 can reflect light back into the light guide plate 10 to be directed in a specific direction, thereby increasing the intensity of the emitted light. Further, as shown in the bottom of fig. 3A, 3B and 3C, in some embodiments, another reflective sheet 50 may be further attached to the bottom of the light guide plate 10. In addition, the flexible circuit board 40 may be white to enhance the effect of reflection.
Fig. 4 is a partial top view of a backlight module according to a fourth embodiment, and fig. 5A is a cross-sectional view of the fourth embodiment taken along the line a-a of fig. 4. FIG. 5B is a cross-sectional view of the fourth embodiment taken along line B-B of FIG. 4. The flexible circuit board 40 is omitted from fig. 4 for clarity of presentation to facilitate description of the relative positions. As shown in fig. 4, 5A and 5B, the fourth embodiment is different from the other embodiments in the positions of the flexible circuit board 40 and the reflective sheet 50. In the fourth embodiment, compared to the third embodiment, the directions of the flexible circuit board 40 and the reflective sheet 50 are reversed, and the reflective sheet 50 covers the entire base surface 17 of the light guide plate 10, so that the single-sided light emitting lamp 20, the multi-sided light emitting lamp 30, and the ambient light are all reflected toward the light emitting surface 205. As shown in fig. 5A, the reflective plate 50 and the flexible circuit board 40 are disposed on opposite surfaces of the single-sided light emitting lamp source 20. As shown in fig. 5B, in the region corresponding to the multi-surface light emitting lamp source 30, the reflective sheet 50, the light guide plate 10, the multi-surface light emitting lamp source 30, and the flexible circuit board 40 are stacked from bottom to top. In addition, a portion of the light guide plate 10 may be located on the flexible circuit board 40 and located on the same side of the single-sided light emitting source 20, and the reflective sheet 50 may also be attached to the inclined surface 153 and a portion of the light guide plate 10.
Fig. 6A is an enlarged cross-sectional view of the fifth embodiment taken along line a-a of fig. 2. Fig. 6B is an enlarged cross-sectional view of the fifth embodiment taken along the line B-B of fig. 2. As shown in fig. 6A and 6B, the fifth embodiment adopts the configuration of fig. 3A and 3C, and only the left side of the fifth embodiment is shown in an enlarged scale, which is different from the previous embodiments in that the single-sided light-emitting lamp source 20 and the multi-sided light-emitting lamp source 30 are blue LEDs. In addition, quantum dot films 60 are provided on the light incident surface 111 and the bottom surface 151, respectively. The single-sided light emitting lamp source 20 and the multi-sided light emitting lamp source 30 are generally white LEDs, and the fifth embodiment uses blue light emitted from the single-sided light emitting lamp source 20 and the multi-sided light emitting lamp source 30 to excite the quantum dots 61 in the quantum dot film 60 to be white light. The wavelengths of the colors are continuous, and the display applied by the backlight module 1 can have higher color saturation. Here, the quantum dots 61 may be quantum dots of yellow or orange phosphor. However, this is merely an example and not intended to be limiting.
Fig. 7 is an enlarged partial cross-sectional view of the sixth embodiment taken along line a-a of fig. 2. As shown in fig. 7, the sixth embodiment adopts the configuration of fig. 3A, and only the left side of the light guide plate 10 is shown in an enlarged manner, which is different from the other embodiments in that a plurality of light guide microstructures 70 are disposed on the light incident surface 111. The light guide microstructures 70 may be diamond lens, etc. the visual effect of the point light source of the single-sided light emitting source 20 can be reduced by the effects of the light guide microstructures 70 and the multi-sided light emitting source 30, and the sixth embodiment is applied under the condition of ensuring the process precision of the light guide microstructures 70, for example, under the condition that the distance between the light guide plate 10 and the single-sided light emitting source 20 is greater than or equal to 4 mm.
In summary, the backlight module 1 mainly arranges the multi-surface light-emitting light source 30 between the two single-surface light-emitting light sources 20, so as to overcome the problem that the non-display area of the display is thinned due to the size limit of the micro-structure for diffusing light or the poor arrangement precision of the conventional LED. Therefore, the backlight module 1 can also be used in thinner displays, providing good visual effects.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes and modifications can be made without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (11)
1. A backlight module comprises:
a light guide plate;
a plurality of single-side light emitting lamp sources positioned at one light incident side of the light guide plate; and
multiple multi-surface light emitting lamp sources located at the light incident side of the light guide plate and between two of the multiple single-surface light emitting lamp sources,
also comprises a flexible circuit board, wherein the plurality of single-side light-emitting lamp sources and the plurality of multi-side light-emitting lamp sources are arranged on the same surface of the flexible circuit board,
the light guide plate comprises a light incident surface and a plurality of extending light guide blocks, wherein the light incident surface of the light guide plate comprises a light incident surface and a plurality of extending light guide blocks, the plurality of extending light guide blocks extend out from the light incident surface, and the plurality of extending light guide blocks respectively correspond to the plurality of multi-surface light emitting lamp sources.
2. The backlight module of claim 1, wherein the plurality of multi-sided light-emitting light sources are smaller in size than the plurality of single-sided light-emitting light sources.
3. The backlight module of claim 1, wherein each of the light guide blocks comprises a bottom surface substantially perpendicular to the light incident surface and facing a main light emitting surface of the multi-surface light source, and an inclined surface extending obliquely from the light incident surface to the bottom surface.
4. The backlight module of claim 3, further comprising a reflector plate contacting the light guide plate and the single-sided light-emitting lamp source, wherein the flexible circuit board and the reflector plate are disposed on two opposite surfaces of the single-sided light-emitting lamp source.
5. The backlight module of claim 4 wherein the reflector plate is further attached to the inclined surface.
6. The backlight module according to any of claims 4 or 5, wherein the reflector plate covers a base surface of the light guide plate, the base surface corresponding to a light-emitting side of the light guide plate.
7. The backlight module according to any of claims 4 or 5, wherein the reflector plate is disposed on a portion of a light-emitting side of the light guide plate and shields the multiple multi-surface light sources.
8. The backlight module of claim 1, wherein a light-emitting surface of the single-sided light-emitting sources faces the light-incident surface, and a first normal direction of the light-emitting surface is substantially orthogonal to a second normal direction of a main light-emitting surface of each of the multiple-sided light-emitting sources.
9. The backlight module of claim 1, wherein the plurality of single-sided light-emitting sources and the plurality of multi-sided light-emitting sources are blue LEDs, each of the extended light guide blocks comprises a bottom surface, and a quantum dot film is further disposed on the light-in surface and the bottom surface, respectively, wherein the blue light emitted from the plurality of single-sided light-emitting sources and the plurality of multi-sided light-emitting sources excites the quantum dots in the quantum dot film to be white light.
10. The backlight module of claim 1, wherein a plurality of light guiding microstructures are further disposed on the light incident surface.
11. The backlight module of claim 1, wherein the spacing between the plurality of multi-faceted light sources is 2.1 to 5.5 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107147534 | 2018-12-27 | ||
| TW107147534A TWI670532B (en) | 2018-12-27 | 2018-12-27 | Back-light module |
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| Publication Number | Publication Date |
|---|---|
| CN110542945A CN110542945A (en) | 2019-12-06 |
| CN110542945B true CN110542945B (en) | 2021-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910837188.8A Active CN110542945B (en) | 2018-12-27 | 2019-09-05 | Backlight module |
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| CN (1) | CN110542945B (en) |
| TW (1) | TWI670532B (en) |
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| CN114667478B (en) * | 2020-10-23 | 2023-09-01 | 瑞仪(广州)光电子器件有限公司 | Light source structure, backlight module and display device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM555059U (en) * | 2017-10-13 | 2018-02-01 | 茂林光電科技股份有限公司 | Backlight module and backlit keyboard |
| TWI643007B (en) * | 2017-08-31 | 2018-12-01 | 友達光電股份有限公司 | Back light module |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2604706Y (en) * | 2003-02-18 | 2004-02-25 | 鸿富锦精密工业（深圳）有限公司 | Back light module block |
| CN2924582Y (en) * | 2005-08-08 | 2007-07-18 | 稳态科技股份有限公司 | Direct type backlight module structure using LED as light source |
| TWI425169B (en) * | 2011-07-07 | 2014-02-01 | Innolux Corp | Lighting apparatus, backlight module and display apparatus |
| CN102818187B (en) * | 2012-07-31 | 2015-02-25 | 京东方科技集团股份有限公司 | Backlight module, display device and method for reducing hot spot phenomenon |
-
2018
- 2018-12-27 TW TW107147534A patent/TWI670532B/en active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI643007B (en) * | 2017-08-31 | 2018-12-01 | 友達光電股份有限公司 | Back light module |
| TWM555059U (en) * | 2017-10-13 | 2018-02-01 | 茂林光電科技股份有限公司 | Backlight module and backlit keyboard |
Also Published As
| Publication number | Publication date |
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| CN110542945A (en) | 2019-12-06 |
| TW202024694A (en) | 2020-07-01 |
| TWI670532B (en) | 2019-09-01 |
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