Optical components, optical engines and projectors

Abstract

This application relates to the field of display technology, providing an optical component, an optical engine, and a projector. The optical component includes a first light-transmitting element, a second light-transmitting element, and a display screen. The second light-transmitting element is spaced apart from the first light-transmitting element, and the display screen is sandwiched between the first and second light-transmitting elements. Thus, dust can be defocused to transform its imaged gray points into dark areas, preventing dust from obscuring pixels and affecting the viewing experience.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to an optical component, an optical engine, and a projector. Background Technology

[0002] In related technologies, LCD (Liquid Crystal Display) screens are widely used in the display field, such as monitors and projectors. When dust adheres to the surface of an LCD screen, it affects the display effect. Especially in projectors, the light emitted from the LCD screen changes its path through optical elements and is magnified. During this process, the image of dust is also magnified and will cover the pixels that are originally displaying the image, resulting in large gray spots on the image and affecting the viewing experience. Utility Model Content

[0003] This application provides an optical component, an optical engine, and a projector that can prevent dust from directly adhering to the surface of an LCD screen, thereby at least partially solving the aforementioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, an optical component is provided, comprising:

[0005] First light-transmitting component;

[0006] The second light-transmitting element is disposed at an interval from the first light-transmitting element;

[0007] The display screen is sandwiched between the first light-transmitting element and the second light-transmitting element.

[0008] Optionally, the thickness of the first light-transmitting element is D1, which satisfies: 3 mm ≤ D1 ≤ 7 mm.

[0009] Optionally, the thickness of the second light-transmitting element is D2, which satisfies: 3 mm ≤ D2 ≤ 7 mm.

[0010] Optionally, the optical component further includes:

[0011] A heat sink is disposed between the first light-transmitting element and the display screen, and / or between the second light-transmitting element and the display screen.

[0012] Optionally, the display screen includes a display area and a non-display area surrounding the display area, and the heat sink is configured as a ring and connected to the non-display area.

[0013] Optionally, the optical component further includes:

[0014] The frame, the first light-transmitting element, the second light-transmitting element, the display screen and the heat dissipation element are all disposed within the frame.

[0015] Optionally, the frame is connected with spaced-apart stop members and limiting members, and the first light-transmitting member, the second light-transmitting member, the display screen and the heat dissipation member are disposed between the stop members and the limiting members, wherein the side of the first light-transmitting member away from the display screen abuts against the stop member, and the side of the second light-transmitting member away from the display screen abuts against the limiting member.

[0016] Optionally, the limiting member includes a connecting part and a limiting part arranged at an angle, the connecting part being connected to the frame, and the limiting part abutting against the second light-transmitting member.

[0017] According to a second aspect of this application, an optical engine is provided, including optical components as described above.

[0018] According to a third aspect of this application, a projector is also provided, including the optical engine as described above.

[0019] In the optical components, optical engine, and projector of this application embodiment, a first light-transmitting element and a second light-transmitting element are respectively provided on opposite sides of the display screen, thereby sealing the opposite sides of the display screen by the first and second light-transmitting elements to prevent dust from directly adhering to the display screen. When dust falls onto the outer surface of the first or second light-transmitting element, due to the thickness of the first and second light-transmitting elements themselves, a certain distance can be maintained between the dust and the display screen, so that the dust image forms a blurred focus, and the displayed effect is a dark block. The dark block only changes the sensitivity of reality and does not obscure the pixels. Thus, dust can transform its imaged gray points into dark blocks through blurred focus, preventing dust from obscuring the pixels and affecting the viewing effect.

[0020] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0023] Figure 1 This is one of the side views of the optical components provided in the exemplary embodiments of this application;

[0024] Figure 2This is a second side view of the optical component provided in an exemplary embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the structure of the heat sink provided in an exemplary embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the frame provided in an exemplary embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. First light-transmitting element;

[0029] 2. Second light-transmitting element;

[0030] 3. Display screen;

[0031] 4. Heat dissipation components;

[0032] 5. Frame;

[0033] 6. Stop components;

[0034] 7. Limiting component; 71. Connecting part; 72. Limiting part. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0036] According to the first aspect of this application, referring to Figures 1 to 4 This application provides an optical component. The optical component includes a first light-transmitting element 1, a second light-transmitting element 2, and a display screen 3. The second light-transmitting element 2 is spaced apart from the first light-transmitting element 1, and the display screen 3 is sandwiched between the first light-transmitting element 1 and the second light-transmitting element 2.

[0037] In this embodiment, by providing a first light-transmitting element 1 and a second light-transmitting element 2 on opposite sides of the display screen 3, the opposite sides of the display screen 3 are sealed by the first light-transmitting element 1 and the second light-transmitting element 2, preventing dust from directly adhering to the display screen 3. When dust falls onto the outer surface of the first light-transmitting element 1 or the second light-transmitting element 2, due to the thickness of the first light-transmitting element 1 and the second light-transmitting element 2 themselves, a certain distance can be maintained between the dust and the display screen 3, so that the dust image forms a blurred focus, and the displayed effect is a dark block. The dark block only changes the sensitivity of reality and does not obscure the pixels. Thus, dust can transform its image of gray points into dark blocks through blurred focus, preventing dust from obscuring the pixels and affecting the viewing effect.

[0038] It is understandable that by setting a first light-transmitting element 1 and a second light-transmitting element 2 on both sides of the display screen 3, dust adhering to the first light-transmitting element 1 and / or the second light-transmitting element 2 can be defocused so that the image no longer covers the pixels, thereby improving the viewing experience. The defocusing effect is positively correlated with the thickness of the first light-transmitting element 1 and / or the second light-transmitting element 2. The thicker the first light-transmitting element 1 and / or the second light-transmitting element 2, the larger the dark area image formed by the dust will be, thus diluting and blurring the dust image so that the dust image only affects part of the brightness without affecting the image pattern.

[0039] In related technologies, when dust adheres to the surface of the display screen 3, magnification through a lens causes even very fine dust particles to appear large in the image, making them directly visible to the viewer. In this embodiment, by providing a first light-transmitting element 1 and a second light-transmitting element 2 on both sides of the display screen 3, and due to the thickness of the first and second light-transmitting elements 1 and 2, an optical defocusing effect can be created, thus blurring and out of focus the dust. The dust will no longer appear as a gray dot, but rather as a blurred, small dark area. This dark area is small and has little impact on brightness, thereby improving the user's viewing experience.

[0040] In some embodiments, the display screen 3 is an LCD screen. Both the first light-transmitting element 1 and the second light-transmitting element 2 are made of glass. This results in good light transmittance for both the first light-transmitting element 1 and the second light-transmitting element 2, while also reducing cost. Furthermore, using glass to make the first light-transmitting element 1 and the second light-transmitting element 2 allows for a significantly higher heat dissipation coefficient than the display screen 3, which is beneficial for the overall heat dissipation of the optical components.

[0041] In some embodiments, both the first light-transmitting element 1 and the second light-transmitting element 2 may be provided with a brightness enhancement film. The brightness enhancement film may be deposited on the large surface of the first light-transmitting element 1 and the second light-transmitting element 2. This allows the optical components to meet high-brightness design requirements.

[0042] In some embodiments, the first light-transmitting element 1 is in seamless contact with the display screen 3. The second light-transmitting element 2 is in seamless contact with the display screen 3.

[0043] In some embodiments, the first light-transmitting element 1 and the display screen 3 are sealed together to prevent dust from entering between them from the connection point and adhering to the surface of the display screen 3, thus affecting the imaging effect. For example, a sealant layer or sealing structure is provided at the connection point between the first light-transmitting element 1 and the display screen 3.

[0044] In some embodiments, the second light-transmitting element 2 and the display screen 3 are sealed together to prevent dust from entering between them from the connection point and adhering to the surface of the display screen 3, thus affecting the imaging effect. For example, a sealant layer or sealing structure is provided at the connection point between the second light-transmitting element 2 and the display screen 3.

[0045] like Figure 1 As shown, in some embodiments, the thickness of the first light-transmitting element 1 is D1, which satisfies: 3 mm ≤ D1 ≤ 7 mm.

[0046] Understandably, if the thickness D1 of the first light-transmitting element 1 is less than 3 mm, it will affect the defocusing effect, or even prevent the formation of a defocusing effect, so that dust will still affect the viewing experience. If the thickness D1 of the first light-transmitting element 1 is greater than 7 mm, it will affect the overall thickness of the optical components, making it difficult to install them in the optical engine.

[0047] In some embodiments, the thickness D1 of the first light-transmitting element 1 is set to 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, or any value between the two.

[0048] like Figure 1 As shown, in some embodiments, the thickness of the second light-transmitting element 2 is D2, which satisfies: 3 mm ≤ D2 ≤ 7 mm.

[0049] Understandably, if the thickness D2 of the second light-transmitting element 2 is less than 3 mm, it will affect the defocusing effect, or even prevent defocusing from forming, so that dust will still affect the viewing experience. If the thickness D2 of the second light-transmitting element 2 is greater than 7 mm, it will affect the overall thickness of the optical components, making it difficult to install them in the optical engine.

[0050] In some embodiments, the thickness D2 of the second light-transmitting element 2 is set to 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, or any value between the two.

[0051] like Figure 2 As shown, in some embodiments, the optical component further includes a heat sink 4. The heat sink 4 is disposed between the first light-transmitting element 1 and the display screen 3. And / or, the heat sink 4 is disposed between the second light-transmitting element 2 and the display screen 3.

[0052] It is understandable that the display screen 3 will generate heat when it is working. The heat can be transferred to the first light-transmitting element 1 or the second light-transmitting element 2 through the heat sink 4 to prevent the heat from accumulating on the display screen 3 and affecting the normal operation of the display screen 3.

[0053] In some embodiments, the projector may also be equipped with a fan near the first light-transmitting element 1 or the second light-transmitting element 2. The heat generated by the display screen 3 is transferred to the first light-transmitting element 1 or the second light-transmitting element 2 through the heat sink 4, and the heat can be quickly dissipated by the fan to prevent heat from accumulating on the optical components.

[0054] In some embodiments, the heat sink 4 is made of graphite.

[0055] In some embodiments, the display screen 3 includes a display area and a non-display area surrounding the display area. For example... Figure 3 As shown, the heat sink 4 is designed as a ring and is connected to the non-display area.

[0056] It is understandable that the central area of ​​the display screen 3 is the display area, and the surrounding area is a non-display area. The heat sink 4 is designed as a ring and connected to the non-display area to prevent the heat sink 4 from affecting the imaging effect of the display screen 3.

[0057] In some embodiments, the heat sink 4 completely covers the non-display area, and the shape and size of the heat sink 4 can be set based on the shape and size of the non-display area. For example, if the non-display area is a square ring structure, then the heat sink 4 is also set as a directional ring structure.

[0058] like Figure 4 As shown, in some embodiments, the optical components also include a frame 5. The first light-transmitting element 1, the second light-transmitting element 2, the display screen 3, and the heat sink 4 are all disposed within the frame 5.

[0059] It is understandable that the first light-transmitting element 1, the second light-transmitting element 2, the display screen 3, and the heat sink 4 are all placed inside the frame 5 to enable the subsequent rapid installation of the optical components, allowing the optical components to be quickly installed inside the optical engine and preventing dust from entering the optical components.

[0060] The frame 5 can structurally construct and position the first light-transmitting element 1, the second light-transmitting element 2, the display screen 3, and the heat sink 4. On the other hand, it can also seal the connection between the first light-transmitting element 1 and the display screen 3, as well as the connection between the second light-transmitting element 2 and the display screen 3, further reducing the possibility of dust falling onto the display surface from the connection between the first light-transmitting element 1 and the display screen 3 or the connection between the light-transmitting element and the display screen 3.

[0061] In some embodiments, the process of assembling the first light-transmitting element 1, the second light-transmitting element 2, the display screen 3 and the heat sink 4 into the frame 5 needs to be carried out in a cleanroom to prevent dust from adhering to the surface of the display screen 3 during the assembly process.

[0062] The modular installation is achieved through the setting of the housing 5, which facilitates its quick installation into a closed optical machine or an open optical machine. At the same time, the optical components can also have a high dust-proof level, and the dust-proof reliability is relatively high.

[0063] As Figure 4 shown, in some embodiments, stoppers 6 and limiters 7 are connected to the housing 5 at intervals. The first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4 are disposed between the stopper 6 and the limiter 7. Among them, one side of the first light-transmitting member 1 away from the display screen 3 abuts against the stopper 6. One side of the second light-transmitting member 2 away from the display screen 3 abuts against the limiter 7.

[0064] It can be understood that by setting the stoppers 6 and limiters 7 at intervals on the housing 5, the first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4 can be fixed between the stopper 6 and the limiter 7, realizing the fixation of the positions of the first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4.

[0065] In some embodiments, the stopper 6 can be set in a "hui" shape, and the stopper 6 is integrally formed on the housing 5.

[0066] In some embodiments, the limiter 7 is detachably disposed on the inner surface of the housing �. After sequentially disposing the first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4 in the housing 5 and making the first light-transmitting member 1 abut against the stopper 6, then install the limiter 7 in the housing 5 and make the limiter 7 abut against the second light-transmitting member 2, thereby realizing the reliable fixation of the first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4.

[0067] In some embodiments, the limiter 7 is detachably installed on the housing 5 through fasteners such as screws.

[0068] In some embodiments, the housing 5 is set to be square. At least one limiter 7 is provided on the inner surface of each side of the housing 5.

[0069] As Figure 4 shown, in some embodiments, the limiter 7 includes a connecting portion 71 and a limiting portion 72 arranged at an angle. The connecting portion 71 is connected to the housing 5. The limiting portion 72 abuts against the second light-transmitting member 2.

[0070] It can be understood that the connecting portion 71 is used to realize the connection with the housing 5, and the limiting portion 72 is used to abut against the second light-transmitting member 2, thereby restricting the first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4 within the interval area between the stopper 6 and the limiting portion 72 to ensure the reliable fixation of the first light-transmitting member 1, the second light-transmitting member 2, the display screen 3, and the heat dissipation member 4.

[0071] In some embodiments, the connecting portion 71 and the limiting portion 72 are integrally formed.

[0072] In some embodiments, the connecting portion 71 and the limiting portion 72 are arranged at a right angle. Alternatively, the connecting portion 71 and the limiting portion 72 are arranged at an acute angle. Alternatively, the connecting portion 71 and the limiting portion 72 are arranged at an obtuse angle.

[0073] According to a second aspect of this application, an optical engine is provided, which includes the aforementioned optical components. This optical engine possesses all the beneficial effects of the aforementioned optical components, which will not be elaborated further herein.

[0074] According to a third aspect of this application, a projector is provided that includes the aforementioned optical engine, and the projector has all the beneficial effects of the aforementioned optical engine, which will not be repeated here.

[0075] In some embodiments, the projector further includes a lens. Since a first light-transmitting element 1 and a second light-transmitting element 2 are respectively disposed on opposite sides of the display screen 3, the thickness of the optical components is greater than originally intended. Therefore, the focal length of the lens can be adjusted by changing the lens thickness, or the front-to-back position of the lens can be moved to accommodate changes in the optical components.

[0076] For example, in related technologies, when directly using the display screen 3 for imaging, the focal length f1 of the lens can be set to 70 mm. In this embodiment, after providing the first light-transmitting element 1 and the second light-transmitting element 2 on opposite sides of the display screen 3, the focal length f2 of the lens can be set to 60 mm, thereby adapting to changes in the optical components.

[0077] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0078] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0079] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0080] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. An optical assembly comprising: include: First light-transmitting component (1); The second light-transmitting element (2) is disposed at an interval from the first light-transmitting element (1); The display screen (3) is sandwiched between the first light-transmitting element (1) and the second light-transmitting element (2); The thickness of the first light-transmitting element (1) is D1, which satisfies: 3 mm ≤ D1 ≤ 7 mm; The thickness of the second light-transmitting element (2) is D2, which satisfies: 3 mm ≤ D2 ≤ 7 mm.

2. The optical component according to claim 1, characterized in that, The optical components also include: A heat sink (4) is disposed between the first light-transmitting element (1) and the display screen (3), and / or, is disposed between the second light-transmitting element (2) and the display screen (3).

3. The optical component according to claim 2, characterized in that, The display screen (3) includes a display area and a non-display area surrounding the display area. The heat sink (4) is arranged in a ring shape and connected to the non-display area.

4. The optical component according to claim 2, characterized in that, The optical components also include: The frame (5) is provided with the first light-transmitting element (1), the second light-transmitting element (2), the display screen (3) and the heat dissipation element (4) all disposed within the frame (5).

5. The optical component according to claim 4, characterized in that, The frame (5) is connected with spaced-apart stop members (6) and limit members (7). The first light-transmitting member (1), the second light-transmitting member (2), the display screen (3) and the heat dissipation member (4) are disposed between the stop member (6) and the limit member (7). The side of the first light-transmitting member (1) away from the display screen (3) abuts against the stop member (6), and the side of the second light-transmitting member (2) away from the display screen (3) abuts against the limit member (7).

6. The optical component according to claim 5, characterized in that, The limiting member (7) includes a connecting part (71) and a limiting part (72) arranged at an angle. The connecting part (71) is connected to the frame (5), and the limiting part (72) abuts against the second light-transmitting member (2).

7. An optical engine, characterized in that, Includes the optical components as described in any one of claims 1 to 6.

8. A projector, characterized in that, Including the optical engine as described in claim 7.

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