High-color-gamut projector light source and assembly thereof
By adding green and red LED chips to the projector light source and optimizing the component design, the problem of insufficient color gamut was solved, resulting in a significant improvement in color and maintenance of brightness.
Patent Information
- Application Number
- CN202520018604.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing LCD projectors have a problem with insufficient color gamut in color reproduction, resulting in color deviation, especially in the green and red light components.
It adopts a high color gamut projector light source, including a substrate and a yellow phosphor encapsulation layer. The substrate is equipped with blue, green and red LED chip groups. The number of green and red LED chips is increased by connecting them in series and controlling them with different circuits. Combined with the component design of heat sink, Fresnel lens, heat insulation glass and LCD screen, the color output of the light is improved.
While maintaining the same brightness, the color gamut of the projector has been significantly improved, resulting in more vibrant colors. The color gamut has been increased by 10-40%, and there is no light decay even after long-term use.
Smart Images
Figure CN223745208U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a projector technical field, especially a kind of high color gamut projector light source and its assembly. BACKGROUND
[0002] The color of LCD screen is divided into R, G, B three colors, the existing LCD projector backlight generally uses integrated COB light source, and the traditional blue light LED chip is wide after encapsulating fluorescent powder Green light half peak, and red light is basically missing, so the integrated COB light source is weak in green and red part in spectrum, which leads to deviation in color restoration after projection, in other words, LCD projector sacrifices color gamut to improve brightness. SUMMARY
[0003] The utility model solves technical problem: provide a kind of high color gamut projector light source and high color gamut projector light source assembly.
[0004] To solve the above technical problem, the technical scheme of the utility model is as follows: a high color gamut projector light source, including substrate and yellow fluorescent powder encapsulating adhesive layer, the substrate is equipped with chip group, the yellow fluorescent powder encapsulating adhesive layer is located on the substrate and covers the chip group, the chip group includes blue light LED chip, green light LED chip and red light LED chip, wherein the number of the blue light LED chip is multiple, and the multiple blue light LED chips are arranged into a plurality of first chip strings, and each blue light LED chip in each first chip string is connected in series.
[0005] In an embodiment, at least one of the first chip string is connected in series with the green light LED chip and / or the red light LED chip.
[0006] In an embodiment, the green light LED chip and / or the red light LED chip are connected in series in each first chip string.
[0007] In an embodiment, the number of green light LED chips in the chip group is multiple, and the multiple green light LED chips are arranged into a plurality of second chip strings, each green light LED chip in each second chip string is connected in series, and the first chip string and the second chip string are controlled by different conduction circuits; or, the first chip string and the second chip string share the same positive electrode of the conduction circuit; or, the first chip string and the second chip string share the same negative electrode of the conduction circuit.
[0008] In an embodiment, the extension direction of the second chip string is the same as or perpendicular to the extension direction of the first chip string.
[0009] In an embodiment, the number of the red light LED wafer in the wafer group is multiple, the multiple red light LED wafers are arranged into a plurality of third wafer strings, each red light LED wafer in each third wafer string is connected in series, and the first wafer string and the third wafer string are controlled to be powered on by different conduction circuits; or, the first wafer string and the third wafer string share the same positive electrode of the conduction circuit; or, the first wafer string and the third wafer string share the same negative electrode of the conduction circuit.
[0010] In an embodiment, the extending direction of the third wafer string is the same as or perpendicular to the extending direction of the first wafer string.
[0011] In an embodiment, a plurality of green light LED wafers and a plurality of red light LED wafers are connected in series to form a fourth wafer string, and the first wafer string and the fourth wafer string are controlled to be powered on by different conduction circuits; or, the first wafer string and the fourth wafer string share the same positive electrode of the conduction circuit; or, the first wafer string and the fourth wafer string share the same negative electrode of the conduction circuit.
[0012] In an embodiment, the extending direction of the fourth wafer string is the same as or perpendicular to the extending direction of the first wafer string.
[0013] To solve the above technical problems, the technical scheme two of the utility model adopts: a high color gamut projector light source assembly, including radiator, fish mirror, heat insulation glass, LCD liquid crystal screen and above-mentioned high color gamut projector light source, the radiator is located in the side of the substrate away from the wafer group, the fish mirror, heat insulation glass and LCD liquid crystal screen are all located on the light emitting direction of the wafer group, the heat insulation glass is located between the fish mirror and the LCD liquid crystal screen and the fish mirror is located on the side of the heat insulation glass close to the substrate;
[0014] Still include light funnel, the light funnel is located between the fish mirror and the substrate, and the light funnel is used to refract the light emitted by the wafer group to make light converge on the fish mirror;Or,
[0015] Still include aspheric condenser lens, the aspheric condenser lens is located between the fish mirror and the substrate, and the aspheric condenser lens is used to converge the light emitted by the wafer group to the fish mirror.
[0016] The utility model discloses the beneficial effect lies in: high color gamut projector light source adopts mixed light mode, equivalent to increasing red light, green light LED wafer that is not excited by fluorescent powder on the basis of original cold white integrated COB light source, cooperate with the enhancement of color output of LCD screen, keep the original brightness while improving the color gamut, make the color more gorgeous. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.
[0018] Figure 1 The first arrangement mode schematic view of the wafer group on the substrate in the high color gamut projector light source;
[0019] Figure 2 The second arrangement mode schematic view of the wafer group on the substrate in the high color gamut projector light source;
[0020] Figure 3 The third arrangement mode schematic view of the wafer group on the substrate in the high color gamut projector light source;
[0021] Figure 4 The fourth arrangement mode schematic view of the wafer group on the substrate in the high color gamut projector light source;
[0022] Figure 5 The fifth arrangement mode schematic view of the wafer group on the substrate in the high color gamut projector light source;
[0023] Figure 6 The sixth arrangement mode schematic view of the wafer group on the substrate in the high color gamut projector light source;
[0024] Figure 7 The structure simplified schematic view of the first high color gamut projector light source assembly;
[0025] Figure 8 The structure simplified schematic view of the second high color gamut projector light source assembly.
[0026] The embodiment of the present application is one…….
[0027] Explanation of the reference signs:
[0028] 1, blue light LED wafer; 2, green light LED wafer; 3, red light LED wafer; 4, first wafer string; 5, second wafer string; 6, third wafer string; 7, fourth wafer string;
[0029] 10, high color gamut projector light source; 20, heat sink; 30, Fresnel lens; 40, heat insulation glass; 50, LCD liquid crystal screen; 60, light funnel; 70, aspheric condenser lens. DETAILED DESCRIPTION
[0030] The purpose, function characteristics and advantages of the present application will be further described with reference to the embodiments and the drawings.
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.
[0032] It should be noted that if the embodiments of the present application involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture, such as shown in the drawings. If the specific posture changes, the directional indications also change accordingly.
[0033] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features.
[0034] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. Taking "and / or" as an example, it includes scheme, or scheme, or and simultaneously satisfied scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the scope of protection required by the present application.
[0035] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0036] Please refer to Figures 1 to 8The utility model discloses an embodiment is: a high color gamut projector light source, including substrate and yellow phosphor encapsulation adhesive layer, yellow phosphor encapsulation adhesive layer is the mixed colloid that yellow phosphor mixes with encapsulation adhesive, be equipped with wafer group and be the on -off circuit of wafer group power supply on the substrate, yellow phosphor encapsulation adhesive layer is located on the substrate and covers wafer group, wafer group includes blue light LED wafer 1, green light LED wafer 2 and red light LED wafer 3, wherein the quantity of blue light LED wafer 1 is multiple, the blue light LED wafer 1 of multiple quantity is arranged into several first wafer strings 4, and each blue light LED wafer 1 in first wafer string 4 is all in series.
[0037] The high color gamut projector light source is equivalent to adding green light LED wafer 2 and green light LED wafer 2 in the original cold white integrated COB light source, and green light and red light can penetrate yellow phosphor encapsulation adhesive layer without exciting yellow phosphor, therefore, green light and red light can penetrate LCD liquid crystal screen 50, and since LCD liquid crystal screen 50 has a color filter film, the light source color can not interfere with each other, red light can only penetrate a red region color point, and green light can only penetrate a green region color point, finally, the effect of improving the color gamut of the projector light source is achieved. Through experiments, the color gamut of the existing LCD projector is only between 30-45%, and the color gamut of the high color gamut projector light source is improved by 10-40% compared with the existing LCD projector. The high color gamut projector light source can maintain the existing brightness and performance without loss, and will not have light attenuation after long-term use.
[0038] In one or more embodiments, at least one of the first wafer strings 4 is connected in series with the green light LED wafer 2 and / or the red light LED wafer 3. As a first arrangement of the wafer group on the substrate in the embodiment, as shown in Figure 1 , the green light LED wafer 2 and the red light LED wafer 3 are connected in series in each of the first wafer strings 4. In other embodiments, the green light LED wafer 2 is connected in series in each of the first wafer strings 4, or the red light LED wafer 3 is connected in series in each of the first wafer strings 4, which is also possible.
[0039] In one or more embodiments, the number of green light LED wafers 2 in the wafer group is multiple, and the multiple green light LED wafers 2 are arranged into several second wafer strings 5, each green light LED wafer 2 in each second wafer string 5 is connected in series, and the first wafer string 4 and the second wafer string 5 share the same positive electrode of the on-off circuit. As a second arrangement of the wafer group on the substrate in the embodiment, as shown in Figure 2 , the first wafer string 4 and the second wafer string 5 are controlled to be powered on by different on-off circuits.
[0040] The extending direction of the second wafer string 5 is the same as or perpendicular to the extending direction of the first wafer string 4.
[0041] In one or more embodiments, the number of the red light LED wafer 3 in the wafer group is multiple, and the multiple red light LED wafer 3 is arranged into several third wafer strings 6, and each red light LED wafer 3 in each third wafer string 6 is connected in series; or, the first wafer string 4 and the third wafer string 6 share the same positive electrode of the conduction circuit; or, the first wafer string 4 and the third wafer string 6 share the same negative electrode of the conduction circuit. As a second arrangement of the wafer group on the substrate in the embodiment, as shown in FIG. 4, the first wafer string 4 and the third wafer string 6 are controlled by different conduction circuits. Figure 2
[0042] The extending direction of the third wafer string 6 is the same as or perpendicular to the extending direction of the first wafer string 4.
[0043] In one or more embodiments, several green light LED wafer 2 and several red light LED wafer 3 are connected in series to form a fourth wafer string 7, as a third arrangement of the wafer group on the substrate in the embodiment, as shown in FIG. 5, the first wafer string 4 and the fourth wafer string 7 are controlled by different conduction circuits; or, as a fourth arrangement of the wafer group on the substrate in the embodiment, as shown in FIG. 6, the first wafer string 4 and the fourth wafer string 7 share the same positive electrode of the conduction circuit; or, as a fifth arrangement of the wafer group on the substrate in the embodiment, as shown in FIG. 7, the first wafer string 4 and the fourth wafer string 7 share the same negative electrode of the conduction circuit. Figure 3 Figure 4 Figure 5
[0044] In other embodiments, the extending direction of the fourth wafer string 7 is the same as the extending direction of the first wafer string 4, as a sixth arrangement of the wafer group on the substrate in the embodiment, as shown in FIG. 8, the extending direction of the fourth wafer string 7 is perpendicular to the extending direction of the first wafer string 4. Figure 6
[0045] It should be noted that the arrangement of the wafer group on the substrate is not limited to the above-mentioned several cases, and the number of the blue light LED wafer 1, the green light LED wafer 2 and the red light LED wafer 3 can be selected according to actual needs, and is not limited to the number shown in the figure.
[0046] The embodiment also provides a high color gamut projector light source assembly, which comprises a heat sink 20, a field lens 30, heat insulation glass 40, an LCD liquid crystal screen 50 and the high color gamut projector light source 10, the heat sink 20 is arranged on the side of the substrate away from the wafer group, the field lens 30, the heat insulation glass 40 and the LCD liquid crystal screen 50 are located on the light emitting direction of the wafer group, the heat insulation glass 40 is located between the field lens 30 and the LCD liquid crystal screen 50, and the field lens 30 is located on the side of the heat insulation glass 40 close to the substrate.
[0047] As shown in the first high color gamut projector light source assembly structure in the embodiment, Figure 7 The high color gamut projector light source assembly also comprises a light funnel 60, the light funnel 60 is located between the field lens 30 and the substrate, and the light funnel 60 is used for refracting the light emitted by the wafer group to condense the light on the field lens 30; the light funnel 60 refracts and condenses the light to convert parallel light on the field lens 30, then to the heat insulation glass 40, and then to the LCD liquid crystal screen 50.
[0048] As shown in the second high color gamut projector light source assembly structure in the embodiment, Figure 8 The high color gamut projector light source assembly also comprises an aspheric condenser lens 70, the aspheric condenser lens 70 is located between the field lens 30 and the substrate, and the aspheric condenser lens 70 is used for condensing the light emitted by the wafer group on the field lens 30 to convert parallel light, then to the heat insulation glass 40, and then to the LCD liquid crystal screen 50. The aspheric condenser lens 70 can make the color mixing more uniform.
[0049] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the inventive concept of the utility model and according to the contents of the utility model specification and drawings are included in the patent protection range of the utility model.
Claims
1. A high color gamut projector light source characterized by: The application relates to a high color gamut projector light source, which comprises a substrate and a yellow fluorescent powder encapsulating adhesive layer, the substrate is provided with a wafer group, the yellow fluorescent powder encapsulating adhesive layer is arranged on the substrate and covers the wafer group, the wafer group comprises blue light LED wafers, green light LED wafers and red light LED wafers, the number of the blue light LED wafers is multiple, the multiple blue light LED wafers are arranged into a plurality of first wafer strings, and each blue light LED wafer in each first wafer string is connected in series.
2. The high color gamut projector light source of claim 1, wherein: At least one of the first wafer strings is connected in series with the green light LED wafer and / or the red light LED wafer.
3. The high color gamut projector light source of claim 2, wherein: Each first wafer string is connected in series with the green light LED wafer and / or the red light LED wafer.
4. The high color gamut projector light source of claim 1, wherein: The number of the green light LED wafers in the wafer group is multiple, the multiple green light LED wafers are arranged into a plurality of second wafer strings, each green light LED wafer in each second wafer string is connected in series, the first wafer string and the second wafer string are controlled to be electrified by different conduction circuits; or the first wafer string and the second wafer string share the same positive electrode of the conduction circuit; or the first wafer string and the second wafer string share the same negative electrode of the conduction circuit.
5. The high color gamut projector light source of claim 4, wherein: The extension direction of the second wafer string is the same as or perpendicular to the extension direction of the first wafer string.
6. The high color gamut projector light source of claim 1, wherein: The number of the red light LED wafers in the wafer group is multiple, the multiple red light LED wafers are arranged into a plurality of third wafer strings, each red light LED wafer in each third wafer string is connected in series, the first wafer string and the third wafer string are controlled to be electrified by different conduction circuits; or the first wafer string and the third wafer string share the same positive electrode of the conduction circuit; or the first wafer string and the third wafer string share the same negative electrode of the conduction circuit.
7. The high color gamut projector light source of claim 6, wherein: The extension direction of the third wafer string is the same as or perpendicular to the extension direction of the first wafer string.
8. The high color gamut projector light source of claim 1, wherein: A plurality of green light LED wafers and a plurality of red light LED wafers are connected in series to form a fourth wafer string, the first wafer string and the fourth wafer string are controlled to be electrified by different conduction circuits; or the first wafer string and the fourth wafer string share the same positive electrode of the conduction circuit; or the first wafer string and the fourth wafer string share the same negative electrode of the conduction circuit.
9. The high color gamut projector light source of claim 8, wherein: The extension direction of the fourth wafer string is the same as or perpendicular to the extension direction of the first wafer string.
10. A high color gamut projector light source assembly, characterized by: The application further relates to a high color gamut projector light source, which comprises a heat sink, a field lens, heat insulation glass, an LCD liquid crystal screen and the high color gamut projector light source according to any one of claims 1 to 9, the heat sink is arranged on the side of the substrate away from the wafer group, the field lens, the heat insulation glass and the LCD liquid crystal screen are located on the light emitting direction of the wafer group, the heat insulation glass is located between the field lens and the LCD liquid crystal screen, and the field lens is located on the side of the heat insulation glass close to the substrate. The application further relates to a high color gamut projector light source, which comprises a heat sink, a field lens, heat insulation glass, an LCD liquid crystal screen and the high color gamut projector light source according to any one of claims 1 to 9, the heat sink is arranged on the side of the substrate away from the wafer group, the field lens, the heat insulation glass and the LCD liquid crystal screen are located on the light emitting direction of the wafer group, the heat insulation glass is located between the field lens and the LCD liquid crystal screen, and the field lens is located on the side of the heat insulation glass close to the substrate. Also included is an aspheric condenser lens located between the field lens and the substrate, the aspheric condenser lens for condensing light rays emitted by the wafer set onto the field lens.