Backlight unit and optical module
By integrating multiple LED packages of varying sizes and colors with electrical connections, the solution addresses component selection limitations and cost issues in uniform light mixing, achieving cost-effective and flexible backlight units and optical modules.
Patent Information
- Application Number
- CN202422228823.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-11
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-11
AI Technical Summary
In the prior art, in order to ensure the light mixing effect, it is necessary to select suitable components such as polarizers and reinforcement film components, resulting in high selection limitations and high production costs.
A number of LED packets of different colors are arranged in the backlight unit. The areas of multiple LED sub-packets in each LED packet are different. The wavelength bandwidth of the light emitted by each LED packet is changed through series or parallel connection to expand the selection range of components such as polarizers.
The production cost of the backlight unit and optical module is reduced, while ensuring good light mixing effect.
Smart Images
Figure CN223108207U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of optical technologies, and more particularly, to a backlight unit and an optical module. Background Art
[0002] A light-emitting diode (LED) is an electro-luminescent semiconductor electronic component. The core part of the light-emitting diode structure is the PN junction. Through the forward conduction of the PN junction, electrons and holes recombine near the PN junction and release photons, releasing energy in the form of photons, thereby generating visible light. The wavelengths and colors of the light emitted by different light-emitting diodes are different according to the materials of the semiconductors used and their doping characteristics. Therefore, light-emitting diodes are widely used in various fields such as lighting and displays.
[0003] In the prior art, in order to make the component containing the light-emitting diode have a uniform light mixing effect, RGB tri-color LEDs are usually used in combination to form light mixing. Then, the light mixing formed by the combination of RGB tri-color LEDs is projected to the outside through components such as a polarizing plate and an enhancement film assembly. However, each primary-color LED has a different wavelength bandwidth. In order to ensure the light-emitting effect of the light mixing, it is necessary to select suitable components such as a polarizing plate, resulting in problems such as a large limitation in the selection of components such as a polarizing plate and an enhancement film assembly and a high manufacturing cost. Summary of the Utility Model
[0004] This application provides a backlight unit and an optical module to solve the problems that in order to ensure the light-emitting effect of the light mixing, it is necessary to select suitable components such as a polarizing plate and an enhancement film assembly, resulting in problems such as a large limitation in the selection of components such as a polarizing plate and an enhancement film assembly and a high manufacturing cost.
[0005] The embodiments of this application are implemented as follows:
[0006] A backlight unit includes an enhancement film assembly and a light mixing LED encapsulation assembly disposed opposite to each other. The light mixing LED encapsulation assembly includes a first substrate and a plurality of LED encapsulations. The plurality of LED encapsulations at least include a first LED encapsulation, a second LED encapsulation, and a third LED encapsulation. The first LED encapsulation, the second LED encapsulation, and the third LED encapsulation are located on a side of the first substrate close to the enhancement film assembly. The light-emitting colors of the first LED encapsulation, the second LED encapsulation, and the third LED encapsulation are different from each other. The first LED encapsulation, the second LED encapsulation, and the third LED encapsulation each include a plurality of LED sub-encapsulations. The plurality of LED sub-encapsulations within each LED encapsulation are electrically connected to each other, and at least two of the plurality of LED sub-encapsulations within each LED encapsulation have different areas.
[0007] In the backlight unit of the present application, a plurality of LED packages of different colors are simultaneously arranged on one side of the enhancement film assembly, and at least two of the plurality of LED sub-packages in each LED package have different areas. Thus, the wavelength bandwidth of the light emitted by each LED package is changed, so as to expand the selection range of components such as the enhancement film assembly, and reduce the cost of component manufacturing.
[0008] In a possible implementation manner, the areas of the first LED package, the second LED package, and the third LED package are all the same or any two of them are the same.
[0009] In a possible implementation manner, the areas of the first LED package, the second LED package, and the third LED package are all different from each other.
[0010] In a possible implementation manner, the first LED package at least includes a first LED sub-package, a second LED sub-package, and a third LED sub-package, and the ratio of the area of the first LED sub-package to the area of the second LED sub-package is equal to the ratio of the area of the second LED sub-package to the area of the third LED sub-package.
[0011] In a possible implementation manner, the second LED package at least includes a fourth LED sub-package, a fifth LED sub-package, and a sixth LED sub-package, and the ratio of the area of the fourth LED sub-package to the area of the fifth LED sub-package, the ratio of the area of the fifth LED sub-package to the area of the sixth LED sub-package, and the ratio of the area of the first LED sub-package to the area of the second LED sub-package are all the same.
[0012] In a possible implementation manner, the second LED package at least includes a fourth LED sub-package, a fifth LED sub-package, and a sixth LED sub-package, the ratio of the area of the fourth LED sub-package to the area of the fifth LED sub-package is equal to the ratio of the area of the fifth LED sub-package to the area of the sixth LED sub-package, and the ratio of the area of the fourth LED sub-package to the area of the fifth LED sub-package is not equal to the ratio of the area of the first LED sub-package to the area of the second LED sub-package.
[0013] In a possible implementation manner, the first LED sub-package is connected in parallel with the second LED sub-package, and the first LED sub-package and the second LED sub-package are connected in series with the third LED sub-package.
[0014] In a possible implementation, a plurality of the LED sub-packages within each of the LED packages are connected in series and / or in parallel.
[0015] An embodiment of the present application further provides an optical module, including a display component and the backlight unit as described above, where the backlight unit is configured to emit light to the display component.
[0016] In a possible implementation, the display component includes a polarizer, a liquid crystal component, and a lower polarizer arranged in sequence. The lower polarizer is disposed on a side of the liquid crystal component close to the backlight unit. The upper polarizer and the lower polarizer are configured to deflect the light emitted by the backlight unit, and the liquid crystal component is configured to adjust its own light transmittance.
[0017] For the backlight unit and the optical module, a plurality of LED packages of different colors are simultaneously arranged on one side of the enhancement film assembly, and at least two of the LED sub-packages within each LED package have different areas. At the same time, the LED sub-packages within each LED package can be connected in series, in parallel, or in a series-parallel hybrid connection. By changing the wavelength of the light emitted by each LED package, the selection range of components such as the polarizer and the enhancement film assembly is expanded. Thereby, the cost of manufacturing the backlight unit and the optical module is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.
[0019] Figure 1 It is a schematic diagram of the simple structure of the backlight unit according to an embodiment of the present application.
[0020] Figure 2 For Figure 1 it is a schematic diagram of a structure of a plurality of LED sub-packages with different areas within each LED package in
[0021] Figure 3 For Figure 2 it is a schematic diagram of the series connection structure of a plurality of LED sub-packages within the first LED package in
[0022] Figure 4 For Figure 1 it is another schematic diagram of a structure of a plurality of LED sub-packages with different areas within each LED package in
[0023] Figure 5 ForFigure 4 Schematic diagram of the structure in which multiple LED sub-packets in the first LED packet are connected in parallel.
[0024] Figure 6 Graph showing the relationship between current and peak wavelength for blue light-emitting diodes at different emission wavelengths.
[0025] Figure 7 Spectrum characteristic curve graph of blue light-emitting diodes with different areas.
[0026] Figure 8 Schematic diagram of the structure of an optical module according to an embodiment of the present application.
[0027] Description of main component symbols:
[0028] Backlight unit 100
[0029] Enhanced film assembly 10
[0030] First enhanced film 11
[0031] Second enhanced film 12
[0032] Third enhanced film 13
[0033] Mixed light LED packet assembly 30
[0034] First substrate 31
[0035] LED packet 32
[0036] First LED packet 321
[0037] Second LED packet 322
[0038] Third LED packet 323
[0039] LED sub-packet 33
[0040] First LED sub-packet 331
[0041] Second LED sub-packet 332
[0042] Third LED sub-packet 333
[0043] Fourth LED sub-packet 334
[0044] Fifth LED sub-packet 335
[0045] Sixth LED sub-packet 336
[0046] Seventh LED sub-packet 337
[0047] Eighth LED sub-packet 338
[0048] The ninth LED sub-packet 339
[0049] Insulating layer 50
[0050] Optical module 200
[0051] Display component 210
[0052] Upper polarizer 211
[0053] Lower polarizer 212
[0054] Liquid crystal component 220
[0055] Thin film transistor layer 221
[0056] Liquid crystal molecule layer 222
[0057] Filter 230 Detailed implementation manners
[0058] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.
[0059] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may also be a middle element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be a middle element at the same time. When an element is considered to be "disposed on" another element, it can be directly disposed on the other element or there may be a middle element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.
[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the description of the present application herein are only for the purpose of describing specific implementation manners and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.
[0061] Some implementation manners of the present application will be described in detail. Without conflict, the following implementation manners and the features in the implementation manners can be combined with each other.
[0062] Embodiment
[0063] Refer to Figures 1 to 5 , this embodiment provides a backlight unit 100.
[0064] Specifically, please refer to Figure 1 , the backlight unit 100 includes a brightness enhancement film assembly 10 and a light mixing LED package assembly 30 which are oppositely arranged. The light mixing LED package assembly 30 includes a first substrate 31 and a plurality of LED packages 32. The plurality of LED packages 32 at least includes a first LED package 321, a second LED package 322, and a third LED package 323. The first LED package 321, the second LED package 322, and the third LED package 323 are located on one side of the first substrate 31 close to the brightness enhancement film assembly 10. The emitting colors of the first LED package 321, the second LED package 322, and the third LED package 323 are different from each other. Please further combine Figure 2 and Figure 4 , the first LED package 321, the second LED package 322, and the third LED package 323 each include a plurality of LED sub-packages 33. In this embodiment, the LED sub-packages 33 are LED chips. The plurality of LED sub-packages 33 in each LED package 32 are electrically connected to each other, and at least two of the plurality of LED sub-packages 33 in each LED package 32 have different areas. In this embodiment, the first LED package 321, the second LED package 322, and the third LED package 323 respectively emit red light, green light, and blue light. In other embodiments, the first LED package 321, the second LED package 322, and the third LED package 323 may also respectively emit green light, red light, and blue light. The present application does not limit the order in which the three LED packages 32 emit the three primary colors of red, green, and blue. As long as it is ensured that the emitting colors of the three LED packages 32 are different from each other. At the same time, according to the actual light mixing requirements, it is also possible to make a certain LED package 32 among the three LED packages 32 emit light of other colors except red, green, and blue, etc. The present application also does not limit the colors of the light emitted by the three LED packages 32.
[0065] In the light mixing LED package assembly 30 of this embodiment, a plurality of LED packages 32 that emit light of different colors are provided. At least two of the plurality of LED sub-packages 33 in each LED package 32 have different areas, and the plurality of LED sub-packages 33 in each LED package 32 are electrically connected to each other. Thus, the wavelength bandwidth of the light emitted by each LED package 32 becomes wider, so as to increase the selection range of components such as the polarizing plate, and thus, the manufacturing costs of the backlight unit 100 and the light mixing LED package assembly 30 are reduced.
[0066] It should be noted that the setting of the first substrate 31 facilitates the fixing of the positions of the first LED package 321, the second LED package 322, and the third LED package 323. And the first substrate 31 is made of a light-transmitting material to ensure that light can pass through the first substrate 31.
[0067] It should also be noted that in order to ensure the stability of the three LED packages 32 on the first substrate 31, insulating layers 50 are provided on both sides of any one LED package 32. The insulating layer 50 is made of an opaque insulating material to fix each LED package 32 to the first substrate 31.
[0068] To better understand this embodiment, the following explains the influence of the broadening of the wavelength bandwidth of the light emitted by the LED package 32 on the selection range of components such as polarizers:
[0069] Please also refer to Figure 6 , which is a graph showing the relationship between current and peak wavelength for blue light-emitting diodes at different emission wavelengths. Figure 6 In Figure 6 , curves 1, 2, 3, and 4 represent that the areas of the blue light-emitting diodes are 30 microns, 40 microns, 50 microns, and 60 microns respectively. It can be seen from
[0070] that as the current increases, the wavelength bandwidths of blue light-emitting diodes with different areas gradually decrease. And at the same current, the wavelength bandwidth corresponding to a blue light-emitting diode with a smaller area is smaller than that corresponding to a blue light-emitting diode with a larger area.
[0070] Please also refer to Figure 7 , which is a spectral characteristic curve graph of blue light-emitting diodes with different areas. Figure 7 In Figure 7 , curves 1 and 2 represent that the areas of the blue light-emitting diodes are 30 microns and 60 microns respectively. The Mix curve represents the curve obtained after mixing the light emitted by a blue light-emitting diode with an area of 30 microns and the light emitted by a blue light-emitting diode with an area of 60 microns. It can be clearly seen from Figure 7 that the wavelengths corresponding to the two peaks of the Mix curve are 439 nm and 459 nm respectively. Both curves 1 and 2 have only one peak. Therefore, it can be concluded that after mixing the light emitted by blue light diodes with different areas, the distance between the two peaks of the curve of the mixed light is larger. Therefore, the selection range of components such as polarizers can be expanded to select polarizers and other components with lower costs and simpler manufacturing processes. Thus, while reducing the manufacturing cost of the component that emits mixed light, it can also ensure that the component has a good mixed light effect.
[0071] It should be noted that Figure 6 and Figure 7 are described by taking blue light diodes as an example. Red light-emitting diodes and green light-emitting diodes have the same characteristics as blue light-emitting diodes, and are not elaborated in this application.
[0072] Based on Figure 6 and Figure 7It can be seen that since the areas of the multiple LED sub - packets 33 in each LED packet 32 are different from each other. Therefore, the emission wavelengths of each LED sub - packet 33 are also different. After the light emitted by the LED sub - packets 33 with different emission wavelengths is mixed, a mixed curve with multiple peaks in Figure 7 can be obtained, thereby expanding the selection range of components such as polarizers.
[0073] Please combine with Figure 2 and Figure 4 again. In some embodiments, the areas of the first LED packet 321, the second LED packet 322, and the third LED packet 323 are all the same or any two of them are the same.
[0074] In other embodiments, the areas of the first LED packet 321, the second LED packet 322, and the third LED packet 323 are all different from each other.
[0075] In this embodiment, since it is necessary to make the element composed of the backlight unit 100 and components such as the polarizer emit uniform mixed light, one or more of the areas of the first LED packet 321, the second LED packet 322, and the third LED packet 323 can be set to be the same. Or the areas of the three LED packets 32 are all different.
[0076] Specifically, the first LED packet 321 at least includes a first LED sub - packet 331, a second LED sub - packet 332, and a third LED sub - packet 333. Denote the ratio of the area of the first LED sub - packet 331 to the area of the second LED sub - packet 332 as the first ratio, and the ratio of the area of the second LED sub - packet 332 to the area of the third LED sub - packet 333 as the second ratio. The first ratio can be equal to the second ratio. For example, the first ratio can be set to Assume the area of the first LED sub - packet 331 is denoted as A, then the area of the second LED sub - packet 332 is The area of the third LED sub - packet 333 is In other embodiments, the first ratio can also be or This application does not limit the specific value of the first ratio, which can be set according to the actual design requirements.
[0077] When the light emitted by the first LED sub - packet 331 with a certain wavelength needs to have a relatively large proportion in the light emitted by the first LED packet 321, the first ratio can also be not equal to the second ratio. For example, when the first ratio is , the second ratio can be Or This application does not limit the specific values of the first ratio and the second ratio either.
[0078] It should be noted that this embodiment is only described by taking the first LED packet 321 as an example. According to actual design requirements, the relationship between the areas of multiple LED sub-packets 33 in the second LED packet 322 and the relationship between the areas of multiple LED sub-packets 33 in the third LED packet 323 can be set with reference to the relationship between the areas of multiple LED sub-packets 33 in the first LED packet 321.
[0079] Furthermore, the second LED packet 322 at least includes a fourth LED sub-packet 334, a fifth LED sub-packet 335, and a sixth LED sub-packet 336. Denote the ratio of the area of the fourth LED sub-packet 334 to the area of the fifth LED sub-packet 335 as the third ratio, and denote the ratio of the area of the fifth LED sub-packet 335 to the area of the sixth LED sub-packet 336 as the fourth ratio. Similarly, the third ratio can be equal to the fourth ratio, or the third ratio is not equal to the fourth ratio.
[0080] In some embodiments, the third LED packet 323 at least includes a seventh LED sub-packet 337, an eighth LED sub-packet 338, and a ninth LED sub-packet 339. Denote the ratio of the area of the seventh LED sub-packet 337 to the area of the eighth LED sub-packet 338 as the fifth ratio, and denote the ratio of the area of the eighth LED sub-packet 338 to the area of the ninth LED sub-packet 339 as the sixth ratio. Similarly, the fifth ratio can be equal to the sixth ratio, or the fifth ratio is not equal to the sixth ratio.
[0081] In some embodiments, the first ratio, the second ratio, the third ratio, the fourth ratio, the fifth ratio, and the sixth ratio can all be equal, or the first ratio, the second ratio, the third ratio, the fourth ratio, the fifth ratio, and the sixth ratio are all not equal. Or, some of the first ratio, the second ratio, the third ratio, the fourth ratio, the fifth ratio, and the sixth ratio are equal, and the other part is not equal.
[0082] The relationship between the areas of multiple LED sub-packets 33 in each of the above-described LED packets 32. When the current passing through each LED packet 32 is the same, by adjusting the area size of each LED packet 32, the color and intensity of the mixed light emitted by multiple LED packets 32 can be adjusted. Or, by adjusting the areas of multiple LED sub-packets 33 in each LED packet 32, the intensity and wavelength of the light emitted by this LED packet 32 can be adjusted, so that the color and intensity of the mixed light emitted by multiple LED packets 32 also change synchronously.
[0083] It should be noted that as Figures 2 to 5The shape of the multiple LED sub-packages 33 in [it] being quadrilateral is only for illustrative introduction, and the present application does not limit the shape of the LED sub-packages 33.
[0084] In some embodiments, multiple LED sub-packages 33 within each LED package 32 are connected in series and / or in parallel. For example, as Figure 2 and Figure 3 shown, the first LED sub-package 331, the second LED sub-package 332, and the third LED sub-package 333 are connected in series. Or, as Figure 4 and Figure 5 shown, the first LED sub-package 331, the second LED sub-package 332, and the third LED sub-package 333 are connected in parallel.
[0085] It can be understood that in other embodiments, any two of the first LED sub-package 331, the second LED sub-package 332, and the third LED sub-package 333 are connected in series, and the other two of them are connected in parallel. The circuit connection relationship among the first LED sub-package 331, the second LED sub-package 332, and the third LED sub-package 333 is not specifically limited in the present application, and its specific circuit connection relationship can be selected according to actual design requirements.
[0086] In some other embodiments, the first LED sub-package 331 is connected in parallel with the second LED sub-package 332, and the first LED sub-package 331 and the second LED sub-package 332 are connected in series with the third LED sub-package 333.
[0087] Similarly, the fourth LED sub-package 334, the fifth LED sub-package 335, and the sixth LED sub-package 336 can be connected in series. Or, the fourth LED sub-package 334, the fifth LED sub-package 335, and the sixth LED sub-package 336 can also be connected in series. Or, the fourth LED sub-package 334 is connected in parallel with the fifth LED sub-package 335, and the fourth LED sub-package 334 and the fifth LED sub-package 335 are connected in series with the sixth LED sub-package 336.
[0088] The sixth LED sub-package 336, the seventh LED sub-package 337, and the ninth LED sub-package 339 can be connected in series. Or, the sixth LED sub-package 336, the seventh LED sub-package 337, and the ninth LED sub-package 339 can also be connected in series. Or, the sixth LED sub-package 336 is connected in parallel with the seventh LED sub-package 337, and the sixth LED sub-package 336 and the seventh LED sub-package 337 are connected in series with the ninth LED sub-package 339.
[0089] It should be noted that the connection methods of the multiple LED sub-packets 33 in the first LED packet 321, the connection methods of the multiple LED sub-packets 33 in the second LED packet 322, and the connection methods of the multiple LED sub-packets 33 in the third LED packet 323 may be the same or different.
[0090] In some embodiments, the number of LED sub-packets 33 in the first LED packet 321, the number of LED sub-packets 33 in the second LED packet 322, and the number of LED sub-packets 33 in the third LED packet 323 are all the same or partially the same. For example, the number of LED sub-packets 33 in the first LED packet 321, the number of LED sub-packets 33 in the second LED packet 322, and the number of LED sub-packets 33 in the third LED packet 323 may all be 2, 3, or 4. Or, the number of LED sub-packets 33 in the first LED packet 321 and the number of LED sub-packets 33 in the second LED packet 322 may be 2, and the number of LED sub-packets 33 in the third LED packet 323 may be 3.
[0091] In other embodiments, the number of LED sub-packets 33 in the first LED packet 321, the number of LED sub-packets 33 in the second LED packet 322, and the number of LED sub-packets 33 in the third LED packet 323 are not the same. For example, the number of LED sub-packets 33 in the first LED packet 321 may be 2, the number of LED sub-packets 33 in the second LED packet 322 may be 3, and the number of LED sub-packets 33 in the third LED packet 323 may be 4.
[0092] In some embodiments, please also combine Figure 1 , the enhancement film assembly 10 includes a first enhancement film 11, a second enhancement film 12, and a third enhancement film 13 that are sequentially stacked. The first enhancement film 11 is adjacent to the mixed-light LED packet assembly 30. Both the first enhancement film 11 and the second enhancement film 12 are brightness enhancement films (BEF). The first enhancement film 11 is BEFⅠ. The second enhancement film 12 is BEFⅡ. The third enhancement film 13 is a reflective polarizing brightness enhancement film. After the light emitted by the mixed-light LED packet assembly 30 is deflected by the first enhancement film 11, the second enhancement film 12, and the third enhancement film 13, the intensity of the backlight source can be increased. Thereby improving the light output effect of the backlight unit 100.
[0093] In the backlight unit 100, a plurality of LED packages 32 of different colors are simultaneously arranged on the first substrate 31. By adjusting the area sizes and connection modes of the plurality of LED sub-packages 33 in each LED package 32, the intensity and wavelength of the light emitted by each LED package 32 are changed. Thus, on the one hand, the color and intensity of the mixed light emitted by the plurality of LED packages 32 are adjusted. On the other hand, the selection range of components such as the selective polarizer is increased, and the manufacturing cost is reduced.
[0094] Please refer to Figure 1 and Figure 8 As shown, an embodiment of the present application further provides an optical module 200. The optical module 200 includes a display component 210 and a backlight unit 100, and the backlight unit 100 is used to emit light to the display component 210.
[0095] In some embodiments, the display component 210 includes a polarizer 211, a liquid crystal component 220, and a polarizer 212 arranged in sequence. The polarizer 212 is arranged on one side of the liquid crystal component 220 close to the backlight unit 100. The polarizer 211 and the polarizer 212 are used to deflect the light emitted by the backlight unit 100, and the liquid crystal component 220 is configured to adjust its own light transmittance. In this embodiment, the light emitted by the backlight unit 100 first enters the polarizer 212 and then passes through the liquid crystal component 220. The liquid crystal component 220 can adjust a part of the light passing through itself. The part of the light passing through the liquid crystal component 220 is deflected by the polarizer 212 and then emitted to the outside.
[0096] Among them, the liquid crystal component 220 includes a thin film transistor layer 221 and a liquid crystal molecule layer 222 arranged adjacent to each other. The thin film transistor layer 221 is arranged adjacent to the polarizer 212. The thin film transistor layer 221 is used to form an electric field on opposite sides of the liquid crystal molecule layer 222 to change the light transmittance of the liquid crystal molecule layer 222.
[0097] It can be understood that in other embodiments, the liquid crystal component 220 can also adopt other liquid crystal structures, and the diopter of the liquid crystal component 220 is adjusted by changing the arrangement of the liquid crystal molecules in the liquid crystal structure, so as to adapt to different users.
[0098] In some embodiments, a color filter 230 is further arranged between the polarizer 211 and the liquid crystal molecule layer 222. In this embodiment, the color filter 230 is a color filter and is used to filter the light passing through the liquid crystal component 220.
[0099] In the prior art, an optical module generally uses a blue LED layer combined with a yellow phosphor layer to form mixed white light, which is then refracted by a display component and projected to the outside. However, the white light formed by mixing a blue LED with a yellow phosphor has poor color rendering performance and a high color temperature, making it difficult to meet the requirements of high color rendering index and low color temperature lighting. In addition, in the phosphor coating process, the controllability and uniformity of the phosphor coating thickness directly affect the brightness and chromaticity consistency of the light emitted by the optical module 200. When the light is emitted, uneven white light colors will be formed, resulting in the appearance of uneven light spots that are locally yellowish or bluish. When the environmental temperature is too high or the heat dissipation is poor, the conversion efficiency of the yellow phosphor will also decrease.
[0100] To solve this problem, a backlight unit 100 is provided on one side of the display component 210, so that the mixed light emitted by the backlight unit 100 is deflected by the display component 210 to obtain a uniform mixed light effect.
[0101] The above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application.
Claims
1. A backlight unit, comprising an enhancement film assembly and a light mixing LED package assembly disposed opposite to each other, characterized in that, The mixed-light LED encapsulation component includes a first substrate and a plurality of LED encapsulations. The plurality of LED encapsulations at least include a first LED encapsulation, a second LED encapsulation, and a third LED encapsulation. The first LED encapsulation, the second LED encapsulation, and the third LED encapsulation are located on one side of the first substrate close to the enhancement film component. The emission colors of the first LED encapsulation, the second LED encapsulation, and the third LED encapsulation are different from each other. The first LED encapsulation, the second LED encapsulation, and the third LED encapsulation each include a plurality of LED sub-encapsulations. The plurality of LED sub-encapsulations within each LED encapsulation are electrically connected to each other, and at least two of the plurality of LED sub-encapsulations within each LED encapsulation have different areas.
2. The backlight unit according to claim 1, wherein The area of the first LED encapsulation, the area of the second LED encapsulation, and the area of the third LED encapsulation are all the same or any two of them are the same.
3. The backlight unit according to claim 1, characterized in that, The area of the first LED encapsulation, the area of the second LED encapsulation, and the area of the third LED encapsulation are all different from each other.
4. The backlight unit according to claim 1, characterized in that, The first LED encapsulation at least includes a first LED sub-encapsulation, a second LED sub-encapsulation, and a third LED sub-encapsulation. The ratio between the area of the first LED sub-encapsulation and the area of the second LED sub-encapsulation is equal to the ratio between the area of the second LED sub-encapsulation and the area of the third LED sub-encapsulation.
5. The backlight unit according to claim 4, wherein, The second LED encapsulation at least includes a fourth LED sub-encapsulation, a fifth LED sub-encapsulation, and a sixth LED sub-encapsulation. The ratio between the area of the fourth LED sub-encapsulation and the area of the fifth LED sub-encapsulation, the ratio between the area of the fifth LED sub-encapsulation and the area of the sixth LED sub-encapsulation, and the ratio between the area of the first LED sub-encapsulation and the area of the second LED sub-encapsulation are all the same.
6. The backlight unit according to claim 4, wherein The second LED encapsulation at least includes a fourth LED sub-encapsulation, a fifth LED sub-encapsulation, and a sixth LED sub-encapsulation. The ratio between the area of the fourth LED sub-encapsulation and the area of the fifth LED sub-encapsulation is equal to the ratio between the area of the fifth LED sub-encapsulation and the area of the sixth LED sub-encapsulation, and the ratio between the area of the fourth LED sub-encapsulation and the area of the fifth LED sub-encapsulation is not equal to the ratio between the area of the first LED sub-encapsulation and the area of the second LED sub-encapsulation.
7. The backlight unit according to claim 4, wherein, The first LED sub-encapsulation is connected in parallel with the second LED sub-encapsulation, and the first LED sub-encapsulation and the second LED sub-encapsulation are connected in series with the third LED sub-encapsulation.
8. The backlight unit according to claim 1, characterized in that The plurality of LED sub-encapsulations within each LED encapsulation are connected in series and / or in parallel.
9. An optical module, characterized in that, It includes a display component and the backlight unit as described in any one of claims 1 to 8. The backlight unit is used to emit light to the display component.
10. The optical module according to claim 9, wherein, The display component includes a polarizer, a liquid crystal component, and an analyzer disposed in sequence. The analyzer is disposed on a side of the liquid crystal component close to the backlight unit. The polarizer and the analyzer are configured to deflect light emitted by the backlight unit, and the liquid crystal component is configured to adjust its own light transmittance.