CN211294505U - Light source module and backlight module - Google Patents
Light source module and backlight module Download PDFInfo
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- CN211294505U CN211294505U CN202020165485.0U CN202020165485U CN211294505U CN 211294505 U CN211294505 U CN 211294505U CN 202020165485 U CN202020165485 U CN 202020165485U CN 211294505 U CN211294505 U CN 211294505U
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Abstract
The utility model relates to a light source module and backlight module, light source module include a plurality of light emitting component, mix light component and optical lens. The light emitting elements are respectively used for emitting light beams. The light mixing element covers the light emitting elements and is positioned on the light path of the light beams. The light mixing element is provided with at least one light outlet opening. The optical lens is arranged on the light path of the light beams, and the light mixing element is positioned between the light emitting elements and the optical lens. The utility model discloses a light source module has good optical quality and good optics adjustability with backlight unit.
Description
Technical Field
The utility model relates to a light source module and backlight module.
Background
In a general lighting product, the light emitting element therein is usually optically designed twice. First, after the light emitting device package is completed, the light emitting device package is optically designed once according to different optical parameters (such as light intensity, luminous flux, color temperature range and distribution), so as to ensure the light emitting quality of each light emitting device package. Then, in order to further satisfy different illumination requirements, it is a common practice to first perform a secondary optical design on the optical lens, and then dispose the optical lens on the light emitting device package to achieve the illumination function. In other words, the secondary optical design is the optical performance of the light after the primary optical design is changed by passing through one optical lens.
However, the optical lens is usually designed for secondary optics only for a single light emitting element, and the color temperature emitted by the single light emitting element is fixed and difficult to adjust, and the applicability is limited.
In order to solve the above-mentioned problems, a direct solution is to use a plurality of light emitting elements in the lighting product, and to dispose an optical lens having a secondary optical design on the optical path of the light emitting elements. However, the optical lens is a secondary optical design with respect to a single light emitting device, and if the optical lens is disposed on the optical path of a plurality of light emitting devices, the light emitting effect is also not good.
The background section is provided to aid in understanding the invention and therefore it is intended that the disclosure in the background section may encompass techniques not forming part of the prior art, which would be known to one of ordinary skill in the art. The disclosure in the "background" section does not represent that item or the problem which is addressed by one or more embodiments of the present invention is known or recognized by those of ordinary skill in the art prior to the filing of the present application.
SUMMERY OF THE UTILITY MODEL
An embodiment of the present invention provides a light source module, which has good optical quality and good optical adjustability.
An embodiment of the present invention provides a backlight module, which has good optical quality and good optical adjustability.
Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention.
An embodiment of the present invention provides a light source module, which includes a plurality of light emitting elements, a light mixing element and an optical lens. The light emitting elements are respectively used for emitting light beams. The light mixing element covers the light emitting elements and is positioned on the light path of the light beams. The light mixing element is provided with at least one light outlet opening. The optical lens is arranged on the light path of the light beams, and the light mixing element is positioned between the light emitting elements and the optical lens.
An embodiment of the present invention provides a backlight module, including a plurality of the above light source modules and a substrate. The light source modules are arranged on the substrate.
Based on the above, in the utility model discloses an among light source module and the backlight unit, because mix the light component and set up between a plurality of light emitting component and optical lens, consequently a plurality of light beams that these light emitting component sent can mix the light back in mixing the light component, and the light-emitting opening light-emitting of rethread mixed the light component is delivered to optical lens. In terms of optical design, the light beam emitted by the light mixing element is similar to the light beam emitted by a single light emitting element, and can be matched with the design of the optical lens, so that the optical lens has good optical quality. In addition, the light source module and the backlight module can readjust different optical parameters of the light-emitting elements to realize different optical changes, so that the light source module and the backlight module have good optical adjustability.
In order to make the aforementioned and other features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
Fig. 1 is a schematic perspective view of a backlight module according to an embodiment of the present invention.
Fig. 2 is an exploded view of the backlight module of fig. 1.
Fig. 3 is a schematic cross-sectional view of the light source module in the backlight module shown in fig. 1 and 2.
Fig. 4 illustrates a coupling relationship between the backlight module controller, the light source module controller, and the first and second light emitting elements.
Fig. 5 is a schematic configuration diagram of a plurality of light emitting elements in a backlight module and a light source module.
Description of the reference numerals
100. 100a to 100 d: light source module
110: light emitting element
112. 112a to 112 d: first light emitting element
114. 114a to 114 d: second light emitting element
120: light mixing element
130: optical lens
140. 140a to 140 d: light source module controller
150: reflective sidewall
200: backlight module
210: substrate
220: backlight module controller
230: optical film layer
EO: light-emitting opening
ES: light emitting surface
IS: light incident surface
HR and HL: height
L: light beam
L1: first color light beam
L2: the second color light beam
Detailed Description
Fig. 1 is a schematic perspective view of a backlight module according to an embodiment of the present invention. Fig. 2 is an exploded view of the backlight module of fig. 1. Fig. 3 is a schematic cross-sectional view of the light source module in the backlight module shown in fig. 1 and 2. Fig. 4 shows a coupling relationship between the backlight module controller, the light source module controller, and the first and second light emitting elements. Fig. 5 is a schematic top view of a plurality of light emitting elements in a backlight module and a light source module.
Referring to fig. 1 to fig. 3, the backlight module 200 includes a plurality of light source modules 100, a substrate 210, a backlight module controller 220, and at least one optical film 230, wherein the number of the light source modules 100 is, for example, 4, but not limited thereto. The light source module 100 includes a plurality of light emitting elements 110, a light mixing element 120, an optical lens 130, a light source module controller 140, and a reflective sidewall 150, but not limited thereto. The above elements will be described in detail in the following paragraphs.
First, the components in the light source module 100 will be described.
The light emitting element 110 is, for example, an element having a light emitting function, and the kind of the light emitting element can be a Light Emitting Diode (LED), a Micro LED (Mini LED), a Micro LED (Micro LED), an Organic LED (Organic LED) or other suitable light emitting elements, which is not limited in the present invention. The light emitting element 110 can emit a light beam L, and the color of the light beam L can be blue light, green light, red light, white light, or other suitable colors, which is not limited in the present invention. Referring to fig. 3, in each light source module 100, the light emitting elements 110 may further include first and second light emitting elements 112 and 114. The first and second light emitting elements 112 and 114 are respectively configured to emit first and second color light beams L1 and L2, wherein a color temperature of the first color light beam L1 is higher than a color temperature of the second color light beam L2, but not limited thereto. In another embodiment, the first and second color light beams L1, L2 may have different colors, which is not limited in the present invention.
The light mixing element 120 has an optical element with a light mixing function, which can mix a plurality of light beams. In the present embodiment, the light mixing element 120 is, for example, a reflective shell having at least one light exit opening EO.
The optical lens 130 IS, for example, an optical element with diopter, and has a light incident surface IS and a light emitting surface ES opposite to each other, wherein the light incident surface IS for receiving the light beam from the light mixing element 120, and the light beam IS emitted out of the optical lens 130 through the light emitting surface ES. Those skilled in the art can design the surface shapes of the light incident surface IS and the light emitting surface ES according to the illumination requirement. In an embodiment, the optical lens 130 may be optically designed to diffuse the light emitting angle of the light beam from the light mixing element 120, but not limited thereto.
The light source module controller 140 (shown in fig. 3 and 4) is coupled to the light emitting elements 110 in the light source module 100 and is configured to selectively control whether any one of the light emitting elements 110 in the light source module 100 emits light or not.
The reflective sidewall 150 is, for example, a sidewall having a reflective function.
Next, elements of the backlight module 200 other than the light source module 100 will be described.
The substrate 210 is, for example, a base for carrying and providing power to the light source modules 100, such as a Printed circuit board (Printed circuit board). In an embodiment, the substrate 210 may also be a reflective substrate with a reflective function, such as a white printed circuit board, or a reflective layer coated or disposed on the printed circuit board.
The backlight module controller 220 (shown in fig. 2 and 4) is coupled to the light source module controllers 140 and is functional to selectively control whether any one of the light emitting elements 110 in the light source modules 100 emits light or not by sending a control signal to the light source module controllers 140.
The optical Film layer 230 is, for example, a material layer with different optical functions, and the material layer is, for example, a Brightness Enhancement Film (BEF), a reflective polarizing Brightness Enhancement Film (DBEF), a diffuser or other suitable optical Film layer. One of ordinary skill in the art can use the optical film 230 with different optical functions according to the lighting requirement, but the invention is not limited thereto.
The arrangement of the above elements will be described in detail in the following paragraphs.
Referring to fig. 2, fig. 3 and fig. 4, the light source modules 100 are disposed on the substrate 210 in an array arrangement of, for example, 2 × 2. The light mixing element 120 covers the light emitting elements 110 in each light source module 100 and is disposed on the optical path of the light beams L. The optical lens 130 is disposed on the optical path of the light beam L, and the light mixing element 120 is located between the light emitting elements 110 and the optical lens 130. The light source module controller 140 (shown in fig. 3) is embedded in the substrate 210, for example, and coupled to the light emitting elements 110 (shown in fig. 4) in the light source module 100. The reflective sidewall 150 is, for example, disposed on the substrate 210 and surrounds the light emitting elements 110, the light mixing element 120 and the optical lens 130. The backlight module controller 220 (shown in fig. 2) is, for example, embedded in the substrate 210, and is coupled to the light source module controllers 140 (shown in fig. 4). The optical film 230 is disposed downstream of the optical lenses 130 in the optical path, wherein the light is transmitted from upstream to downstream of the optical path. Therefore, the optical path downstream of the element can be understood as the optical path portion of the light passing through the element, for example, the optical path downstream of the optical film 230, the optical path portion of the light emitted from the optical film 230, and the optical path downstream of the optical film 230, or from another perspective, wherein the fact that the a element is located downstream of the optical path of the B element means that the light beam passing through the B element is transmitted to the a element. It should be noted that, in the present embodiment, the number of the optical film layers 230 is, for example, one. In other embodiments, one of ordinary skill in the art can select a plurality of optical films according to the optical design requirement, but the invention is not limited thereto.
The optical effects of the light source module 100 and the backlight module 200 will be described in detail in the following paragraphs.
Referring to fig. 3, in the light source module 100 and the backlight module 200 of the present embodiment, since the light mixing element 120 is disposed between the light emitting elements 110 and the optical lens 130, the light beams L emitted by the light emitting elements 110 can be mixed in the light mixing element 120, and then emitted through the light emitting opening EO of the light mixing element 120 and transmitted to the optical lens 130.
In detail, most of the light beam L is reflected by the inner surface of the light mixing element 120 one or more times, and then exits from the light exit opening EO of the light mixing element 120, and a small portion of the light beam L exits directly from the light exit opening EO of the light mixing element 120. In other words, in the light mixing element 120, since the position of the light exit opening EO is fixed, the light beams L exit from the same position. In terms of optical design, the light beam L emitted by the light mixing element 120 after light mixing can be similar to the light beam emitted by a single light emitting element, and can conform to the secondary optical design of the optical lens 130 at the rear end thereof, so that the light source module 100 and the backlight module 200 have good optical quality.
Then, the light beam L emitted from the light mixing element 120 after being mixed enters the optical lens 130 through the light incident surface IS, and exits the optical lens 130 through the light emitting surface ES, and finally, passes through the optical film 230 to output the light beam to the backlight module 200.
Referring to fig. 3 and 4, in the backlight module 200, the backlight module controller 220 can selectively control whether the light emitting elements 110 in the light source module 100 emit light or not by sending a control signal to the light source module controller 140. In the above embodiments, the light source module controller 140 provides current to drive the first and second light emitting elements 112 and 114 simultaneously, for example, to emit the first and second color light beams L1 and L2. In other embodiments, the light source module controller 140 may also provide only current to drive one of the first and second light emitting elements 112, 114. Since the first or second color light beams L1, L2 are emitted from the fixed light-emitting opening EO no matter in the state that only the first or second light-emitting elements 112, 114 emit light, the light beam L emitted after being mixed by the light-mixing element 120 can be similar to the light beam emitted by a single light-emitting element, and can conform to the secondary optical design of the rear optical lens 130.
The following paragraphs will describe different applications of the light source module 100 and the backlight module 200. For convenience of illustration, fig. 5 shows four light source modules 100, the light source modules 100 located at the upper left corner, the upper right corner, the lower left corner and the lower right corner are respectively labeled as 100a, 100b, 100c and 100d, and the rear parts of the element labels thereof are also correspondingly labeled with corresponding english letters.
Referring to fig. 4 and 5, in the backlight module 200, the backlight module controller 220 controls a part of the light source modules 100 to emit light and controls another part of the light source modules 100 not to emit light through the light source module controllers 140, so as to implement Local dimming (Local dimming). For example, in an embodiment, the backlight module controller 220 can control the light source modules 100a and 100d located at the upper left corner and the lower right corner to emit light, and control the light source modules 100c and 100b located at the lower left corner and the upper right corner not to emit light, and the above-mentioned positions of the light source modules 100 to emit light are only for illustration, and the present invention is not limited thereto. That is, the backlight module controller 220 may selectively control the corresponding light source module controller 140 in the light source modules 100 located in different regions to make the corresponding region emit light.
As mentioned above, referring to fig. 3, in the present embodiment, the height HR of the reflective sidewall 150 is designed to be greater than the height HL of the optical lens 130. Since the optical lens 130 functions to diffuse the light emitting angle of the light beam from the light mixing element 130, if the height design is adopted, the light beam diffused by the optical lens 130 can be limited within the range surrounded by the reflective sidewall 130 to achieve the effect of regional backlight control, whereas if the height HL of the optical lens 130 is higher than the height HR of the reflective sidewall 150, the light beam will overflow to the outside of the reflective sidewall 150, and the effect of regional backlight control cannot be achieved.
Referring to fig. 3, 4 and 5, in the backlight module 200, the backlight module controller 220 may also send a control signal to the light source module controllers 140(140a to 140d) of any of the light source modules 100(100a to 100d) to provide different driving currents for the first and second light emitting elements 112 and 114(112a to 112d, 114a to 114d) so as to make the light intensities of the first color light beam L1 and the second color light beam L2 different, and further adjust the color temperature of the light emitted from the light mixing element 120, thereby implementing regional color temperature control.
Referring to fig. 3, fig. 4 and fig. 5, in the backlight module 200, if the color temperature (or the light emitting color) of the light source module 100 in different regions needs to be switched, the backlight module controller 220 may send a control signal to the light source module controller 140 in the light source module 100 that is to be color temperature switched. Then, the light source module controller 140 controls the first and second light-emitting elements 112 and 114 to emit the first and second color light beams L1 and L2 with different color temperatures according to the control signal. For example, assuming that the color temperature emitted from the light source module 100a at the upper left corner in fig. 5 is higher and needs to be switched to a lower color temperature, the backlight module controller 220 sends a control signal to the light source module controller 140a of the light source module 100 a. When the light source module controller 140a receives the control signal, it turns off the first light emitting element 112a capable of emitting light with a higher color temperature and turns on the second light emitting element 114a with a lower color temperature to switch the color temperature, and vice versa.
As described above, the backlight module 200 according to the embodiment of the present invention can provide a light source for a display (not shown) to display an image frame on the display. For example, in the normal mode, the backlight module controller 220 can send out a control signal to all the light source module controllers 140 to control the first light-emitting elements 112 to emit the first color light beam L1 with a higher color temperature and control the second light-emitting elements 114 not to emit the second color light beam L2 with a lower color temperature, so as to provide the display light source at the rear end of the backlight module 200 for the display to display normally (normal mode). Alternatively, in the eye protection mode, the backlight module controller 220 may send a control signal to all the light source module controllers 140 to control the second light-emitting elements 114 to emit the second color light beams L2 with lower color temperature and control the first light-emitting elements 112 not to emit the first color light beams L1 with higher color temperature, so as to provide the display light source located at the rear end of the backlight module 200. Therefore, the backlight module 200 can provide a softer light source to prevent the eyes of the user from being over-stimulated due to the high color temperature. Since the conventional display device may implement the normal mode or the eye protection mode by filtering the proportion of the light beam (e.g., blue light) with a high color temperature through software and an algorithm, the filtering manner may cause a reduction in the light emitting efficiency. Relatively speaking, the light source module 100 and the backlight module 200 according to the embodiment of the present invention can be switched in the above manner, so as to avoid the above mentioned filtering step and improve the problem of poor light emitting efficiency in the prior art.
As mentioned above, in another embodiment, the backlight module 200 of the embodiment of the present invention can also be used as a light source (not shown) of a night vision display. For example, in the daytime mode, the backlight module controller 220 can send a control signal to all the light source module controllers 140 to control the first light-emitting elements 112 to emit the first color light beam L1 (e.g., white light) and control the second light-emitting elements 114 not to emit the second color light beam L2 (e.g., green light), so that the normal display can be performed during the daytime. In the night mode, the backlight module controller 220 can send a control signal to all the light source module controllers 140 to control the second light-emitting elements 114 to emit the second color light beam L2 (e.g., green light), and control the first light-emitting elements 112 not to emit the first color light beam L1 (e.g., white light). Generally, human eyes are most sensitive to green light, so the night vision display using the backlight module 200 of this embodiment can provide an image that is easier to be viewed by human eyes in the night mode, and simultaneously can prevent the red light band in the white light from affecting the receiving of infrared rays by the night vision display.
As can be seen from the above, the backlight module 200 can be adjusted to achieve different applications, and has good optical adjustability.
In summary, in the light source module and the backlight module of the present invention, since the light mixing element is disposed between the plurality of light emitting elements and the optical lens, the plurality of light beams emitted by the light emitting elements can be mixed in the light mixing element, and then emitted from the light outlet opening of the light mixing element and transmitted to the optical lens. In terms of optical design, the light beam emitted by the light mixing element is similar to the light beam emitted by a single light emitting element, and can be matched with the design of the optical lens, so that the optical lens has good optical quality. In addition, the light source module and the backlight module can readjust different optical parameters of the light-emitting elements to realize different optical changes, so that the light source module and the backlight module have good optical adjustability.
The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made according to the claims and the contents of the specification of the present invention are still included in the scope of the present invention. Moreover, it is not necessary for any embodiment or aspect of the invention to achieve all of the objects, advantages, or features disclosed herein. In addition, the abstract and the utility model name are only used to assist the searching of the patent documents, and are not used to limit the scope of the invention. Furthermore, the terms "first", "second", and the like in the description or the claims are used only for naming elements (elements) or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit on the number of elements.
Claims (17)
1. A light source module, characterized in that the light source module comprises a plurality of light emitting elements, a light mixing element and an optical lens, wherein;
the plurality of light-emitting elements are respectively used for emitting light beams;
the light mixing element covers the plurality of light emitting elements and is positioned on the light path of the light beam, and the light mixing element is provided with at least one light outlet opening; and
the optical lens is arranged on the light path of the light beam, and the light mixing element is positioned between the plurality of light emitting elements and the optical lens.
2. The light source module of claim 1, further comprising a light source module controller that selectively controls whether any of the plurality of light emitting elements emits light or not.
3. The light source module of claim 2, wherein the plurality of light emitting elements includes a first light emitting element and a second light emitting element, the first light emitting element is configured to emit a first color light beam, and the second light emitting element is configured to emit a second color light beam, wherein a color temperature of the first color light beam is higher than a color temperature of the second color light beam.
4. The light source module of claim 3, wherein the light source module controller provides different currents to the first light emitting element and the second light emitting element to make the light intensities of the first color light beam and the second color light beam different.
5. The light source module of claim 1, further comprising a reflective sidewall surrounding the plurality of light emitting elements, the light mixing element, and the optical lens.
6. The light source module of claim 5, wherein the height of the reflective sidewall is greater than the height of the optical lens.
7. The light source module of claim 1, wherein the light mixing element further comprises a reflective shell.
8. A backlight module is characterized in that the backlight module comprises a plurality of light source modules and a substrate, wherein the light source modules are arranged in the substrate;
each of the plurality of light source modules includes a plurality of light emitting elements, a light mixing element, and an optical lens, wherein:
the light-emitting elements are respectively used for emitting a light beam;
the light mixing element covers the plurality of light emitting elements and is positioned on the light path of the light beam, and the light mixing element is provided with at least one light outlet opening; and
the optical lens is arranged on the light path of the light beam, the light mixing element is positioned between the plurality of light emitting elements and the optical lens, and the plurality of light source modules are arranged on the substrate.
9. The backlight module according to claim 8, wherein each of the plurality of light source modules further comprises a light source module controller that selectively controls whether any of the plurality of light emitting elements emits light or not.
10. The backlight module of claim 9, further comprising a backlight module controller coupled to the plurality of light source module controllers, the backlight module controller selectively controlling whether any of the plurality of light emitting elements in the plurality of light source modules emits light or not through the plurality of light source module controllers.
11. The backlight module of claim 10, wherein the backlight module controller controls a portion of the plurality of light source modules to emit light and another portion of the plurality of light source modules to not emit light through the plurality of light source module controllers.
12. The backlight module of claim 10, wherein the plurality of light emitting elements in each of the plurality of light source modules comprises a first light emitting element and a second light emitting element, the first light emitting element is configured to emit a first color light beam, and the second light emitting element is configured to emit a second color light beam, wherein a color temperature of the first color light beam is higher than a color temperature of the second color light beam.
13. The backlight module of claim 12, wherein the backlight module controller provides different currents to the corresponding first and second light emitting elements through each of the light source module controllers to make the light intensities of the first and second color light beams different.
14. The backlight module of claim 8, wherein each of the plurality of light source modules further comprises a reflective sidewall surrounding the plurality of light emitting elements, the light mixing element, and the optical lens.
15. The backlight module of claim 14, wherein the height of the reflective sidewall is greater than the height of the optical lens.
16. The backlight module of claim 8, wherein each light mixing element further comprises a reflective shell.
17. The backlight module of claim 8, further comprising at least one optical film layer disposed in an optical path downstream of the plurality of optical lenses.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020165485.0U CN211294505U (en) | 2020-02-13 | 2020-02-13 | Light source module and backlight module |
| TW109201935U TWM597885U (en) | 2020-02-13 | 2020-02-21 | Light source module and backlight module |
| JP2021000228U JP3231471U (en) | 2020-02-13 | 2021-01-26 | Light source module and backlight module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020165485.0U CN211294505U (en) | 2020-02-13 | 2020-02-13 | Light source module and backlight module |
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| CN211294505U true CN211294505U (en) | 2020-08-18 |
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| CN202020165485.0U Active CN211294505U (en) | 2020-02-13 | 2020-02-13 | Light source module and backlight module |
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| JP (1) | JP3231471U (en) |
| CN (1) | CN211294505U (en) |
| TW (1) | TWM597885U (en) |
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|---|---|---|---|---|
| CN115704974B (en) * | 2021-08-05 | 2024-04-02 | 海信视像科技股份有限公司 | Display device |
| US11960684B2 (en) | 2022-07-20 | 2024-04-16 | Chicony Power Technology Co., Ltd. | Light-emitting touch panel |
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- 2020-02-21 TW TW109201935U patent/TWM597885U/en unknown
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| JP3231471U (en) | 2021-04-01 |
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