High-color-gamut LED light source module and display

Abstract

The utility model discloses a high-color-gamut LED light source module and a display. The high-color-gamut LED light source module comprises at least one LED wafer and a light-emitting part, and the light-emitting part is installed in the light-emitting direction of the LED wafer. The LED wafer comprises a first quantum well layer, a second quantum well layer and a third quantum well layer; the first quantum well layer is respectively connected with the second quantum well layer and the third quantum well layer; the first quantum well layer is electroluminescent, and the second quantum well layer and the third quantum well layer are photoluminescent. In the high-color-gamut LED light source module, a first quantum well layer is electrified to emit blue light, a second quantum well layer is excited to emit green light, a third quantum well layer is excited to emit red light, and the finally emitted blue light, red light and green light form a white light spectrum; according to the high-color-gamut LED light source module, the light spectrum totally emitted by the LED wafer can excite the light-emitting part, the light-emitting spectrum of the LED wafer can be supplemented, the high-color-gamut LED light source module has a wider color gamut, a quantum film and a quantum dot diffusion plate do not need to be additionally arranged, and the overall cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of LED technology, and in particular to a high color gamut LED light source module and a display. Background Art

[0002] Color gamut is a method of encoding colors to represent a color range or area. Color gamut is mainly used to indicate the screen's ability to truly restore colors. Simply put, the wider the color gamut of a display device, the brighter the colors, the higher the color restoration, and the richer and more realistic the images seen by the human eye. With the continuous improvement of LCD display technology, OLED display technology, and LED display technology, high color gamut panels have become a key selling point of products.

[0003] The LCD panel itself does not emit light, and must be illuminated by a backlight source to display content normally. The backlight sources of LCD panels mainly include fluorescent lamps and LED light sources. LED has become the mainstream backlight source for LCD screens because of its excellent luminous efficiency, long life, small size, energy saving and environmental protection, and fast response. Since most LED white light is formed by using blue LED chips to excite phosphors, and the half-wave width of the phosphor is relatively wide, the NTSC color gamut of the display device generally does not exceed 72% under normal circumstances. Even if KSF phosphors with a narrow half-wave width are used, their color gamut generally does not exceed 90%.

[0004] OLED panels and LED panels are self-luminous and self-displaying, and do not require a backlight source. The mainstream LED panel display technologies are Mini-LED and Micro-LED. With the rapid development of Mini-LED and Micro-LED, LED panel display technology is becoming more and more mature. However, due to the insufficient purity of the original LED light spectrum, its color gamut is generally low.

[0005] In order to improve the color gamut, existing devices add low-concentration quantum dot diffusion plates and quantum films inside, but the cost of low-concentration quantum dot diffusion plates and quantum films is relatively high, resulting in an increase in the overall cost of the product. Utility Model Content

[0006] The technical problem to be solved by the present application is that in order to improve the color gamut, the existing devices use LEDs in combination with low-concentration quantum dot diffusion plates or LED light sources in combination with quantum films to achieve high color gamut, but the low-concentration quantum dot diffusion plates and quantum films are relatively expensive, resulting in an increase in the overall cost of the product.

[0007] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a high color gamut LED light source module and a display.

[0008] In a first aspect, the utility model discloses a high color gamut LED light source module, which includes at least one LED chip and a light-emitting element, wherein the light-emitting element is installed in the light-emitting direction of the LED chip;

[0009] The LED chip includes a first quantum well layer, a second quantum well layer, and a third quantum well layer; the first quantum well layer is respectively connected to the second quantum well layer and the third quantum well layer;

[0010] The first quantum well layer is electroluminescent, and the second quantum well layer and the third quantum well layer are photoluminescent.

[0011] Preferably, the light-emitting element wraps the LED chip;

[0012] Or the LED chips are arranged in an array, and the light-emitting components are suspended above the light-emitting surfaces of the LED chips.

[0013] Preferably, the spectrum emitted by the first quantum well layer is ultraviolet light or blue light, the emission wavelength is 310-490 nm, the CIE-1931 chromaticity coordinate X value is 0.05-0.25, and the CIE-1931 chromaticity coordinate Y value is 0.01-0.2.

[0014] Preferably, the spectrum emitted by the second quantum well layer is green light, the emission wavelength is 510-560 nm, the CIE-1931 chromaticity coordinate X value is 0.01-0.4, and the CIE-1931 chromaticity coordinate Y value is 0.3-0.9.

[0015] Preferably, the spectrum emitted by the third quantum well layer is red light, the emission wavelength is 610-680 nm, the CIE-1931 chromaticity coordinate X value is 0.3-0.8, and the CIE-1931 chromaticity coordinate Y value is 0.1-0.5.

[0016] Preferably, the light-emitting component comprises glue, green powder and red powder, and the red powder and the green powder are mixed with the glue.

[0017] Preferably, the green powder comprises green quantum dot phosphor and green base powder;

[0018] The particle diameter of the green quantum dot phosphor is 1nm-30nm, the particle diameter of the green base powder is 1um-50um, and the green quantum dot phosphor and the green base powder are photoluminescent;

[0019] The green base powder is any one of β-SiAlON phosphor, silicate phosphor, aluminate phosphor and perovskite phosphor.

[0020] Preferably, the red powder comprises red quantum dot fluorescent powder and red base powder;

[0021] The diameter of the red quantum dot phosphor particles is 1nm-30nm, the diameter of the red base powder particles is 1um-50um, and the red quantum dot phosphor and the red base powder are photoluminescent;

[0022] The red base powder is any red phosphor selected from nitride phosphor, nitrogen oxide phosphor, KSF phosphor, sulfide phosphor and perovskite phosphor.

[0023] Preferably, it comprises a substrate or a bracket, wherein the bracket or the substrate is connected to the LED chip, and the bracket or the substrate is used to carry the LED chip.

[0024] In a second aspect, the utility model discloses a display, which includes the high color gamut LED light source module described in any one of the above items.

[0025] The above technical solution provided by this application has the following advantages compared with the prior art:

[0026] The high color gamut LED light source module and display provided by the present application, in the high color gamut LED light source module, the first quantum well layer emits blue light when energized, stimulates the second quantum well layer to emit green light, and stimulates the third quantum well layer to emit red light, and the blue light, red light, and green light finally emitted constitute a white light spectrum; the overall spectrum emitted by the LED chip will stimulate the light-emitting component, which can supplement the light-emitting spectrum of the LED chip, so that the high color gamut LED light source module has a wider color gamut, and there is no need to add quantum films and quantum dot diffusion plates, thereby reducing overall costs.

[0027] In addition, the display uses a high color gamut LED light source module. Since it uses LED chips and light-emitting components inside to emit white light, it not only has a high color gamut but also avoids the use of quantum films and quantum dot diffusion plates, thereby reducing overall costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present utility model, and together with the description, are used to explain the principles of the present utility model.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 A schematic diagram of the structure of a high color gamut LED light source module provided in this application;

[0031] Figure 2 A schematic diagram of the structure of a high color gamut LED light source module provided in this application.

[0032] Description of reference numerals;

[0033] 1. High color gamut LED light source module;

[0034] 11. LED chip; 111. first quantum well layer; 112. second quantum well layer; 113. third quantum well layer;

[0035] 12. Luminous part; 121. Glue; 122. Green powder; 123. Red powder. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] First, see Figure 1-2 The utility model discloses a high color gamut LED light source module 1, which includes at least one LED chip 11 and a light-emitting component 12, wherein the light-emitting component 12 is installed in the light-emitting direction of the LED chip 11; specifically, the LED chip 11 is used to excite the light source, and the light-emitting component 12 is installed in the light-emitting direction of the LED chip 11. The light emitted by the LED chip 11 can excite the light-emitting component 12 to emit light, and the light emitted by the light-emitting component 12 can supplement the missing spectrum of the LED chip 11.

[0038] Optionally, the high color gamut LED light source module 1 further includes a substrate or a bracket, the bracket or the substrate is connected to the LED chip 11, the bracket or the substrate is used to carry the LED chip 11, and the light source module can choose whether to install the substrate or the bracket according to the packaging method. In addition, the material used for the supporting substrate or bracket includes but is not limited to copper, aluminum, iron, ceramic, glass fiber, and glass.

[0039] Optionally, the light emitting element 12 may be coated on the LED chip 11, that is, the light emitting element 12 is in direct contact with the LED chip 11. In this case, the light emitting element 12 may wrap one LED chip or multiple LED chips. In addition, the LED chip 11 is mounted on the substrate or bracket at equal distances, the light emitting element 12 is mounted on the LED chip 11, and the edge of the light emitting element 12 is mounted on the substrate or bracket. In this case, the light emitting element 12 is not in direct contact with the LED chip 11, which can increase the installation methods of the light emitting element 12 and make the structure of the light source module more diverse.

[0040] In particular, if the CSP (Chip Scale Package) packaging method, i.e., chip-level packaging, is used in the light source module, it can be used without a carrier substrate or bracket, or a carrier substrate or bracket can be installed. If the SMD (Surface Mounted Devices) packaging method, i.e., surface mount packaging, is used, a carrier substrate or bracket needs to be installed.

[0041] The LED chip 11 includes a first quantum well layer 111, a second quantum well layer 112, and a third quantum well layer 113; the first quantum well layer 111 is connected to the second quantum well layer 112 and the third quantum well layer 113 respectively, the first quantum well layer 111 is electroluminescent, and the second quantum well layer 112 and the third quantum well layer 113 are photoluminescent.

[0042] Specifically, the first quantum well layer 111 emits ultraviolet light or blue light when energized, which stimulates the second quantum well layer 112 to emit green light and the third quantum well layer 113 to emit red light. The LED chip 11 emits blue light, red light, and green light to form a white light spectrum. The overall spectrum emitted by the LED chip 11 will stimulate the light-emitting component 12 coated on the surface of the LED, which can supplement the light-emitting spectrum of the LED chip 11, so that the high color gamut LED light source module 1 has a wider color gamut, and there is no need to add quantum films and quantum dot diffusion plates, thereby reducing the overall cost.

[0043] Among them, the second quantum well layer 112 and the third quantum well layer 113 are respectively arranged on two opposite surfaces of the first quantum well layer 111, that is, the electroluminescent first quantum well layer 111 is arranged in the middle position, and the second quantum well layer 112 and the third quantum well layer 113 are respectively installed above and below the first quantum well layer 111. This arrangement can facilitate the first quantum well layer 111 to emit light, while the second quantum well layer 112 and the third quantum well layer 113 are affected by the light emitted by the first quantum well layer 111, so that the second quantum well layer 112 and the third quantum well layer 113 themselves emit light.

[0044] In particular, the LED chip includes a substrate, a quantum well layer is arranged on the substrate, and the quantum well layer is constructed based on the substrate. The substrate includes silicon-based (Si), gallium nitride-based (GaN), silicon carbide-based (SiC), and sapphire-based (Al2O3).

[0045] The spectrum emitted by the first quantum well layer 111 is ultraviolet light or blue light, with an emission wavelength of 310-490nm, a CIE-1931 chromaticity coordinate X value of 0.05-0.25, and a CIE-1931 chromaticity coordinate Y value of 0.01-0.2. The spectrum emitted by the second quantum well layer 112 is green light, with an emission wavelength of 510-560nm, a CIE-1931 chromaticity coordinate X value of 0.01-0.4, and a CIE-1931 chromaticity coordinate Y value of 0.3-0.9. The spectrum emitted by the third quantum well layer 113 is red light, with an emission wavelength of 610-680nm, a CIE-1931 chromaticity coordinate X value of 0.3-0.8, and a CIE-1931 chromaticity coordinate Y value of 0.1-0.5. The peak wavelength of the blue light spectrum is greater than 50 nm away from the peak wavelength of the green light spectrum; the peak wavelength of the green light spectrum is greater than 70 nm away from the peak wavelength of the red light spectrum.

[0046] The LED chips 11 need to maintain consistent structure, consistent optical properties, and consistent electrical properties. Among them, the consistent structure of each LED chip 11 means that all LED chips 11 in the same LED light source have the same chip structure. That is, the physical dimensions of any of the three structures of upright structure LED, flip-chip structure LED, and vertical structure LED can be completely consistent or inconsistent. Each LED chip 11 has the same or similar emission spectrum distribution, and the spectral peak wavelengths of each LED chip 11 are similar. The peak wavelengths of the blue light spectrum differ by no more than 10nm, and the peak wavelengths of the green light spectrum differ by no more than 10nm, thereby ensuring the consistency of the optical properties of the LED chips 11. In addition, under the rated operating current, the operating voltage of the LED chips 11 on the substrate is consistent, and the electrical properties need to be consistent.

[0047] The light emitting element 12 includes glue 121, green powder 122 and red powder 123, and the red powder 123 and the green powder 122 are mixed by the glue 121. Specifically, the glue 121 mixes the red powder 123 and the green powder 122, and then directly covers the LED chip 11 in a single-surface or multi-surface covering manner, or the light emitting element 12 is made into a film, and the edge of the film is installed on a substrate or a bracket, so as to achieve non-contact installation between the light emitting element 12 and the LED chip 11.

[0048] The green powder 122 includes green quantum dot phosphor and green base powder; the particle diameter of the green quantum dot phosphor is 1nm-30nm, the particle diameter of the green base powder is 1um-50um, the green quantum dot phosphor and the green base powder are photoluminescent; the green base powder is any one of β-SiAlON phosphor, silicate phosphor, aluminate phosphor, and perovskite phosphor.

[0049] Specifically, the green quantum dot phosphor is excited by the LED chip 11, and the emission peak wavelength after excitation is between 510-560nm, and the half-width wavelength of its emission spectrum does not exceed 20nm. The green base powder is excited by the LED chip 11, and the emission peak wavelength after excitation is between 510-560nm. The green powder 122 is excited by the LED light source and the final emission spectrum peak wavelength is between 510-560nm; the half-width wavelength of its emission spectrum does not exceed 80nm.

[0050] The red powder 123 includes red quantum dot phosphor and red base powder; the red quantum dot phosphor particle diameter is 1nm-30nm, the red base powder particle diameter is 1um-50um, the red quantum dot phosphor and the red base powder are photoluminescent; the red base powder is any one of nitride phosphor, nitrogen oxide phosphor, KSF phosphor, sulfide phosphor, and perovskite phosphor.

[0051] Specifically, the red quantum dot phosphor is excited by the LED chip 11, and the emission peak wavelength after excitation is between 610-660nm, and the half-width wavelength of its emission spectrum does not exceed 20nm. The red base powder is excited by the LED chip 11, and the emission peak wavelength after excitation is between 610-660nm. The red powder 123 is excited by the LED light source and the final emission spectrum peak wavelength is between 610-660nm; the half-width wavelength of its emission spectrum does not exceed 80nm.

[0052] The LED chip 11 cooperates with the luminescent material to emit blue light, green light and red light to form a white light spectrum. The CIE-1931 chromaticity coordinate X value is 0.15-0.45, and the CIE-1931 chromaticity coordinate Y value is 0.15-0.4.

[0053] In the second aspect, the utility model discloses a display, which includes the above-mentioned high color gamut LED light source module 1. Specifically, the display is equipped with a high color gamut LED light source module 1, which uses an LED chip 11 and a light-emitting element 12 to emit white light. While having a high color gamut, it also avoids using a quantum film and a quantum dot diffusion plate, thereby reducing the overall cost.

[0054] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0059] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0060] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include these modifications and variations.

[0061] The above is a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A high color gamut LED light source module, characterized in that: It comprises at least one LED chip and a light-emitting element, wherein the light-emitting element is installed in the light-emitting direction of the LED chip; The LED chip includes a first quantum well layer, a second quantum well layer, and a third quantum well layer; the first quantum well layer is respectively connected to the second quantum well layer and the third quantum well layer; The first quantum well layer is electroluminescent, and the second quantum well layer and the third quantum well layer are photoluminescent.

2. The high color gamut LED light source module according to claim 1, characterized in that: The light-emitting element wraps the LED chip; Or the LED chips are arranged in an array, and the light-emitting components are suspended above the light-emitting surfaces of the LED chips.

3. The high color gamut LED light source module according to claim 1, characterized in that: The spectrum emitted by the first quantum well layer is ultraviolet light or blue light, the emission wavelength is 310-490 nm, the CIE-1931 chromaticity coordinate X value is 0.05-0.25, and the CIE-1931 chromaticity coordinate Y value is 0.01-0.

2.

4. The high color gamut LED light source module according to claim 1, characterized in that: The spectrum emitted by the second quantum well layer is green light, the emission wavelength is 510-560 nm, the CIE-1931 chromaticity coordinate X value is 0.01-0.4, and the CIE-1931 chromaticity coordinate Y value is 0.3-0.

9.

5. The high color gamut LED light source module according to claim 1, characterized in that: The spectrum emitted by the third quantum well layer is red light, the emission wavelength is 610-680 nm, the CIE-1931 chromaticity coordinate X value is 0.3-0.8, and the CIE-1931 chromaticity coordinate Y value is 0.1-0.

5.

6. The high color gamut LED light source module according to claim 1, characterized in that: It comprises a substrate or a bracket, wherein the bracket or the substrate is connected to the LED chip, and the bracket or the substrate is used to carry the LED chip.

7. A display, characterized in that: A high color gamut LED light source module comprising any one of claims 1 to 6.

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