Projection devices and smart wearable devices

Abstract

This application discloses a projection device and a smart wearable device, relating to the field of smart wearable device technology. The projection device includes: an imaging component having a projection area, the projection area having multiple sub-projection areas; a light source module having multiple light source areas corresponding to the multiple sub-projection areas; an image processing circuit having an input terminal for receiving image signals, the image processing circuit being electrically connected to both the imaging component and the light source module; the image processing circuit being used to output image signals to the imaging component; and the image processing circuit being used to control each light source area to be in a light-emitting state or a light-emitting state according to the image signals. This application can effectively control the light source brightness and light source color of the light source area corresponding to each sub-projection area. Furthermore, since both the imaging component and the light source module are partitioned, when the color of any area is black, the light source of the corresponding light source area can be turned off, thereby reducing the power consumption of the light source module and reducing the heat generated by the light source.

Description

Technical Field

[0001] This application relates to the field of smart wearable device technology, and in particular to a projection device and a smart wearable device. Background Technology

[0002] A projection device consists of an imaging component and a light source. The light source employs a series of optical designs, such as collimation and homogenization, to ensure that light is projected evenly onto the imaging component. The imaging component is typically a reflective display screen, which reflects light to predetermined positions through precise adjustment of pixel units, thereby displaying a color image composed of RGB color mixing. However, in existing technologies, the high power consumption of the light source component leads to the generation of a large amount of heat, which can easily cause phenomena such as thermal defocusing, thus negatively impacting image quality. Summary of the Invention

[0003] The main objective of this invention is to provide a projection device that reduces the problem of poor image quality caused by thermal defocusing due to heat generated by the light source.

[0004] To achieve the above objectives, the present invention provides a projection device, the projection device comprising:

[0005] An imaging component, the imaging component having a projection area, the projection area having multiple sub-projection areas;

[0006] A light source module, wherein the light source module is provided with multiple light source areas corresponding to each of the multiple sub-projection areas;

[0007] An image processing circuit, having an input terminal for receiving video signals, is electrically connected to the imaging component and the light source module, respectively.

[0008] The image processing circuit is used to convert the input video signal into an image signal and output it to the imaging component;

[0009] The image processing circuit is further configured to determine, based on the image signal, the light source area to be turned on and the light source area to be turned off in the light source module, control the light source area to be turned on to be in a light-emitting state, and control the light source area to be turned off to remain in a closed state.

[0010] Optionally, the image processing circuit is used to analyze the RGB color threshold of each light source area corresponding to the image signal. When the RGB color thresholds of the light source area corresponding to the image signal are all lower than the preset color threshold, the light source area is controlled to remain in the off state. When at least one of the RGB color thresholds of the light source area corresponding to the image signal is not less than the preset color threshold, the light source area is controlled to be in the light-emitting state.

[0011] Optionally, the imaging component includes:

[0012] A reflective screen, wherein the differential signal terminal of the reflective screen is connected to the first output terminal of the image processing circuit, and the enable output terminal of the reflective screen is connected to the first input terminal of the image processing circuit, or the enable output terminal of the reflective screen is connected to the enable terminal of the light source module, and the reflective screen is used to reflect the light source emitted by the light source module to display the image signal.

[0013] Optionally, the light source module includes M*N multi-element LEDs, each of which is disposed in one of the light source areas. Each multi-element LED includes 3 or 4 LED beads, and each multi-element LED includes at least red, green and blue LED beads.

[0014] Optionally, the light source module further includes:

[0015] A light source driver chip, wherein the controlled terminal of the light source driver chip is connected to the second output terminal of the image processing circuit; and the output terminal of the light source driver chip is electrically connected to each of the multi-element LEDs.

[0016] The light source driver chip is used to drive the multi-element LED to either be in a light-emitting state or remain in a closed state according to the control signal output by the image processing circuit.

[0017] Optionally, the number of output channels of the light source driver chip is not less than the number of lamp beads.

[0018] Optionally, the image processing circuit is further configured to determine the RGB color threshold of the image signal and control the corresponding light source area to be turned on to illuminate the light signal of the corresponding color.

[0019] Optionally, the image processing circuit is further configured to analyze the brightness information of each of the light source areas corresponding to the RGB color threshold of the image signal, and control the current of the light source area in the light-emitting state to control the brightness of the light source area.

[0020] Optionally, the image processing circuit is further configured to determine the RGB color threshold of the image signal and compensate the current signal output to the light source module to improve the contrast of the image signal on the imaging component.

[0021] Optionally, the image processing circuit includes:

[0022] A video signal circuit, wherein the input terminal of the video signal circuit is used to connect to a video signal source;

[0023] An image processing chip, wherein the input terminal of the image processing chip is connected to the output terminal of the video signal circuit, and the output terminal of the image processing chip is electrically connected to the imaging component and the light source module respectively;

[0024] The video signal circuit is used to convert the video signal source into a signal format corresponding to the image processing chip. The image processing chip is used to convert the video signal converted by the video signal circuit into an image signal and output it to the imaging component. The image processing chip is also used to determine the light source area to be turned on and the light source area to be turned off in the light source module according to the image signal, control the light source area to be turned on in the light source module to be in the light-emitting state, and control the light source area to be turned off to remain in the off state.

[0025] Optionally, the video signal circuit includes:

[0026] A video signal conversion chip is provided, wherein the input terminal of the video signal conversion chip is used to connect to a video signal source, the differential output terminal of the video signal conversion chip is connected to the second input terminal of the image processing circuit, and the video signal conversion chip is used to convert the video signal source into the image signal and output it to the image processing circuit.

[0027] Optionally, the projection device further includes:

[0028] A control circuit is electrically connected to the video input device. The control terminal of the control circuit is connected to the controlled terminal of the video signal conversion chip, and the output terminal of the control circuit is connected to the third input terminal of the image processing circuit.

[0029] In addition, to achieve the above objectives, the present invention also provides a smart wearable device, including the projection device described above.

[0030] This invention, through the inclusion of an imaging component and a light source module, which are electrically connected to an image processing circuit, divides the projection area of ​​the imaging component into multiple sub-projection areas. The light source module is configured with multiple light source areas corresponding to each sub-projection area. This allows the image signal to be processed by the image processing circuit and then output to the imaging component. Alternatively, the image processing circuit can control each light source area to be in a light-emitting state or a light-emitting state based on the image signal. This effectively controls the brightness and color of the light source area corresponding to each sub-projection area, achieving accurate image display. Furthermore, since both the imaging component and the light source module are partitioned, when the color of any area is black, the light source of the corresponding area can be turned off, thereby reducing the power consumption of the light source module, reducing heat generation, and minimizing the problem of thermal defocusing leading to poor image quality. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 This is a circuit structure block diagram of a projection device according to an embodiment of the present invention;

[0034] Figure 2 for Figure 1 The circuit structure block diagram of the light source module and imaging components in the image;

[0035] Figure 3 for Figure 1 A schematic diagram illustrating the effect of the image processing circuit controlling the light source module.

[0036] Figure 4 for Figure 1 A schematic diagram showing the effect of the image processing circuit controlling the red LED beads of the light source module to emit light.

[0037] Figure 5 This is a circuit structure block diagram of a projection device according to another embodiment of the present invention;

[0038] Figure 6 This is a circuit structure block diagram of a projection device according to another embodiment of the present invention;

[0039] Figure 7 This is a circuit structure block diagram of a projection device according to another embodiment of the present invention;

[0040] Figure 8 This is a circuit structure block diagram of a projection device according to another embodiment of the present invention;

[0041] Figure 9 This is a circuit structure block diagram of a projection device according to another embodiment of the present invention;

[0042] Figure 10 This is a circuit structure block diagram of a projection device according to another embodiment of the present invention.

[0043] Explanation of icon numbers:

[0044]

[0045] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Well-known modules, units, and their connections, links, communications, or operations are not shown or described in detail. Furthermore, the described features, architectures, or functions can be combined in any way in one or more embodiments.

[0047] A projection device consists of an imaging component and a light source. The light source employs a series of optical designs, such as collimation and homogenization, to ensure that light is projected evenly onto the imaging component. The imaging component is typically a reflective display screen that reflects light to predetermined positions through precise adjustment of pixel units, thereby displaying a color image composed of RGB color mixing. However, existing light source components consume a lot of power, resulting in significant heat generation and thus high costs for heat dissipation design. Improper heat dissipation can also cause phenomena such as thermal defocusing, negatively impacting image quality.

[0048] The main solution of this application embodiment is: by providing an imaging component and a light source module, which are then electrically connected to an image processing circuit, and dividing the projection area of ​​the imaging component to form multiple sub-projection areas, the light source module is provided with multiple light source areas corresponding to the sub-projection areas, so that the image signal is processed by the image processing circuit and then output to the imaging component, or the image processing circuit controls each light source area to be in a light-emitting state or to stop emitting light according to the image signal.

[0049] This application provides a solution that can effectively control the light source brightness and color of the light source area corresponding to each sub-projection area, thereby achieving accurate image display. Since the imaging component and the light source module are both partitioned, when the color of any area is black, the light source of the corresponding light source area can be turned off, thereby reducing the power consumption of the light source module, reducing the heat generated by the light source, and thus reducing the problem of poor image quality caused by thermal defocus.

[0050] It is important to note that the projection device in this embodiment can be used in various smart wearable devices, such as smart glasses and head-mounted displays. By integrating into smart wearable devices, users can enjoy a more convenient and immersive visual experience. For example, in smart glasses, the projection device can project images directly onto the user's retina, providing high-resolution images while maintaining the device's portability and comfort. In head-mounted displays, the projection device can provide a wide field of view and high-definition images, suitable for applications such as gaming, virtual reality (VR), and professional simulation training.

[0051] Reference Figures 1 to 4 In one embodiment of the present invention, the projection device includes an imaging component 10, a light source module 20, and an image processing circuit 30, wherein:

[0052] The imaging component 10 has a projection area, which has multiple sub-projection areas 11; the light source module 20 has multiple light source areas 21 corresponding to the multiple sub-projection areas 11; the image processing circuit 30 has an input terminal for receiving video signals, and the image processing circuit 30 is electrically connected to the imaging component 10 and the light source module 20 respectively; the image processing circuit 30 is used to convert the input video signal into an image signal and output it to the imaging component 10; the image processing circuit 30 is also used to determine the light source areas 21 to be turned on and the light source areas 21 to be turned off in the light source module 20 according to the image signal, control the light source areas 21 to be turned on to be in the light-emitting state, and control the light source areas 21 to be turned off to remain in the closed state.

[0053] In the projection device, the imaging component 10 may include a reflective liquid crystal display panel (LCD) or a digital micromirror device (DMD), and the light source module 20 may use an LED light source or a laser light source. The image processing circuit 30 may integrate image enhancement algorithms to optimize image quality, such as through dynamic contrast adjustment, color correction, and edge sharpening techniques. The image processing circuit 30 may be an FPGA or other dedicated image processing chip 31.

[0054] In the projection device, the imaging component 10 is divided into multiple sub-projection areas 11, and the light source module 20 is divided into multiple light source areas 21 corresponding to the sub-projection areas 11. Each light source area 21 can be independently controlled and adjusted to meet the lighting needs of different areas, thereby achieving the purpose of energy saving and improving image quality. The image processing circuit 30 is electrically connected to the imaging component 10 and the light source module 20, respectively. The image processing circuit 30 converts the input video signal into an image signal and, based on the characteristics of the image signal (e.g., RGB color thresholds), determines the light source areas 21 to be turned on and those to be turned off in the light source module 20. In other words, the multiple light source areas 21 in the light source module 20 are classified into areas to be turned on and areas to be turned off. Generally, the off light source area 21 is a light source area 21 with a black color threshold, while the light source area 21 to be turned on consists of various non-black color areas, formed by mixing the three primary colors (red, green, and blue). This controls the light source area 21 to be turned on to be in a light-emitting state and controls the off light source area 21 to remain in a closed state. Figure 3 As shown, Figure 3The image signal contains color threshold information. Regions A1 and A5 both have RGB colors. When these three colors are superimposed, regions A1 and A5 appear white, while other regions appear black. Regions A1 and A5 are designated as the light source areas 21 to be activated, requiring them to be in a light-emitting state. Regions other than A1 and A5 must remain in a closed state to maintain a black color, thereby reducing the power consumption of the light source module 20, reducing heat generation, and minimizing the problem of thermal defocusing leading to poor image quality. And as... Figure 4 As shown, Figure 4 Only the red LED beads in area A5 are lit, meaning only the color threshold of the R color in area A5 reaches the preset value. At this time, the A5 area of ​​the control light source module 20 is in the light-emitting state and the color is red, while other light source areas 21 outside of area A5 remain in the off state.

[0055] Compared to existing technologies, existing solutions often involve improving the heat sink of the light source module 20. The design cost of the heat sink is often relatively high, and it cannot completely solve the problem of overheating of the light source module 20. However, this embodiment divides the light source module 20 into multiple light source areas 21, which can better control the light source area 21 to be turned on to be in the light-emitting state and control the light source area 21 to be turned off to remain in the off state. This reduces the heat generated by the light source at the source, thereby reducing the problem of poor image quality caused by thermal defocus.

[0056] Optionally, the image processing circuit 30 is used to analyze the RGB color threshold of each light source area 21 corresponding to the image signal. When the RGB color thresholds of the light source area 21 corresponding to the image signal are all lower than the preset color threshold, the light source area 21 is controlled to remain in the off state. When at least one of the RGB color thresholds of the light source area 21 corresponding to the image signal is not less than the preset color threshold, the light source area 21 is controlled to be in the light-emitting state.

[0057] When the image processing circuit 30 controls the light source area 21 to remain in the off state or be in the light-emitting state, it analyzes the RGB color threshold of each light source area 21 corresponding to the image signal. When the RGB color threshold of each pixel in any light source area 21 is low, such as being close to the black threshold, it indicates that the area is dark. The black display can be achieved by turning off the light source of the light source area 21. The black threshold can be set according to actual needs. For example, when the RGB threshold is all below 10, that is, less than (10, 10, 10), it is set to black. It can also be set to (10, 10, 20). The setting of this color threshold can be determined according to the actual situation.

[0058] Optionally, the image processing circuit 30 is also used to determine the RGB color threshold of the image signal and control the corresponding light source area 21 to be turned on to light up the corresponding color light signal.

[0059] When at least one of the RGB color thresholds in the light source area 21 corresponding to the image signal is not less than a preset color threshold, the light source area 21 is controlled to be in a light-emitting state. For example, the preset color threshold for red is 50. When it is not less than 50, the light source area 21 is controlled to be in a light-emitting state. For example, if the color threshold is (50, 0, 0), the corresponding red is displayed. Alternatively, if multiple color thresholds meet the requirements, for example, if the color threshold is (60, 80, 112), the corresponding mixed color is displayed, thereby achieving multi-color display. In this way, the image processing circuit 30 can precisely control the brightness and color of each light source area 21, achieving a more refined image display effect.

[0060] Optionally, the image processing circuit 30 is also used to analyze the brightness information of each light source area 21 corresponding to the RGB color threshold of the image signal, and control the current of the light source area 21 in the light-emitting state to control the brightness of the light source area 21.

[0061] In the brightness control process, the main focus is on controlling the current of the light source in each light source area 21. For example, when the light source is an LED, the current of the LED is controlled to adjust the brightness of the corresponding light source area 21, thereby achieving fine-tuning of the image brightness. For instance, when the brightness information of the light source area 21 corresponding to the image signal indicates that a darker display effect is needed, the image processing circuit 30 will reduce the current passing through the LED in that area to lower the brightness; conversely, if a brighter display effect is needed, the current is increased to increase the brightness. Through this current control method, the brightness of each light source area 21 can be dynamically adjusted to adapt to the display needs of different scenes and content.

[0062] Optionally, the image processing circuit 30 is also used to determine the RGB color threshold of the image signal and to compensate the current signal output to the light source module 20 in order to improve the contrast of the image signal on the imaging component 10.

[0063] In the process of achieving corresponding output of the light source and image signal, to make the output image colors more vibrant, the image processing circuit 30 compensates according to the RGB color thresholds of the image signal to enhance the image's contrast and color saturation. For example, if the image signal displays a region with a high red threshold and low green and blue thresholds, the image processing circuit 30 will correspondingly increase the current output of the red channel while decreasing the current output of the green and blue channels, thereby enhancing the display effect of red and making the image more vivid and clear. This compensation mechanism ensures that even in dim or bright lighting conditions, the projected image maintains high color fidelity and contrast, thus providing a superior visual experience.

[0064] This embodiment of the invention includes an imaging component 10 and a light source module 20, which are electrically connected to an image processing circuit 30. The projection area of ​​the imaging component 10 is divided into multiple sub-projection areas 11. The light source module 20 is provided with multiple light source areas 21 corresponding to each sub-projection area 11. The image signal is input to the image processing circuit 30 for processing and then output to the imaging component 10. Alternatively, the image processing circuit 30 can control each light source area 21 to be in a light-emitting state or a light-emitting state according to the image signal. This can effectively control the light source brightness and light source color of the light source area 21 corresponding to each sub-projection area 11, achieving accurate image display. Since both the imaging component 10 and the light source module 20 are partitioned, when the color of any area is black, the light source of the corresponding light source area 21 can be turned off, thereby reducing the power consumption of the light source module 20, reducing the heat generated by the light source, and thus reducing the problem of poor image quality caused by thermal defocus.

[0065] Optionally, refer to Figure 5 Another embodiment of the present invention provides a projection device based on the above. Figure 1 In the embodiment shown, the imaging component 10 includes a reflective screen 12, wherein:

[0066] The differential signal terminal of the reflective screen 12 is connected to the first output terminal of the image processing circuit 30, and the enable output terminal of the reflective screen 12 is connected to the first input terminal of the image processing circuit 30, or the enable output terminal of the reflective screen 12 is connected to the enable terminal of the light source module 20. The reflective screen 12 is used to reflect the light source emitted by the light source module 20 to display image signals.

[0067] In this embodiment, the reflective screen 12 can be a liquid crystal display panel (LCD) or a digital micromirror device (DMD). The differential signal terminal of the reflective screen 12 receives signals from the image processing circuit 30 to control the reflective characteristics of the screen, while the enable output terminal is used to control the screen's on / off state. When the image processing circuit 30 determines that the image signal of a certain area is black, it can turn off the reflection function of the corresponding area by controlling the enable output terminal, thereby reducing unnecessary light source consumption and effectively reducing power consumption and heat generation. Furthermore, by precisely controlling the reflective characteristics of the reflective screen 12, fine adjustment of image brightness and contrast can be achieved to adapt to different ambient light conditions, providing a clearer and more vivid image display effect.

[0068] Optionally, refer to Figure 6 Another embodiment of the present invention provides a projection device based on the above. Figure 1 In the embodiment shown, the light source module 20 includes M*N multi-element LEDs, wherein:

[0069] Each multi-element LED is set in a light source area 21. Each multi-element LED includes 3 or 4 LED beads, and each multi-element LED includes at least red, green and blue LED beads.

[0070] Light source module 20 Figure 5 As shown, it is divided into M*N groups, and Figure 5 The image shows three LED beads, from left to right: red, green, and blue. In actual use, these three beads are packaged together, meaning... Figure 5 The three partitions shown are stacked one-to-one. Three types of LEDs or four LEDs are packaged to form a multi-element LED. If there are three LEDs, they are RGB LEDs. If there are four LEDs, they can be RGBR LEDs, RGBG LEDs, or RGBB LEDs. In this embodiment, RGBG LEDs are used when there are four LEDs.

[0071] By assigning a one-to-one correspondence between the multi-LEDs and the light source area 21, each multi-LED can be independently controlled, enabling precise adjustment of different colors and brightness. The use of multi-LEDs not only improves the flexibility and adaptability of the light source but also allows for fine-tuning of brightness and color by precisely controlling the current of each LED, thereby achieving energy savings and improved image quality. Furthermore, the multi-LED packaging design helps reduce the overall size of the light source module 20, making the projection device more compact and easier to integrate into various devices, such as smart wearable devices.

[0072] Optionally, refer to Figure 7 In another embodiment of the present invention, a projection device is provided, based on the above... Figure 5In the embodiment shown, the light source module 20 further includes a light source driver chip 22, wherein:

[0073] The controlled terminal of the light source driver chip 22 is connected to the second output terminal of the image processing circuit 30; the output terminal of the light source driver chip 22 is electrically connected to each multi-element LED; the light source driver chip 22 is used to drive the multi-element LED to be in the light-emitting state or to remain in the off state according to the control signal output by the image processing circuit 30.

[0074] The light source driver chip 22 can be a switch driver chip, which can precisely control the current of each multi-element LED according to the instructions of the image processing circuit 30, thereby adjusting its brightness and color. By introducing the light source driver chip 22, the driving capability of the image processing circuit 30 can be significantly improved, enabling the multi-element LEDs to work better. The use of the light source driver chip 22 makes the current control of each multi-element LED more precise, thereby achieving fine adjustment of the light source brightness and color.

[0075] In practical applications, the light source driver chip 22 can independently control each multi-element LED according to the signal output by the image processing circuit 30 to adapt to different image display requirements. For example, when displaying a darker scene, the current of the multi-element LED can be reduced to decrease brightness; while when displaying a bright scene, the current can be increased to increase brightness. Through this dynamic adjustment, the contrast and color saturation of the projected image can be effectively improved.

[0076] Optionally, the number of output channels of the light source driver chip 22 is not less than the number of LED beads.

[0077] The light source driver chip 22 needs to be connected to each of the LED beads packaged in the multi-element LED for control, ensuring that each LED bead can be independently adjusted according to the needs of the image signal. For example, if the multi-element LED contains four LED beads, then the light source driver chip 22 should have at least four output channels, each corresponding to one LED bead. Moreover, it needs to be configured according to the M*N multi-element LEDs of the light source module 20. For example, if the light source module 20 includes M*N multi-element LEDs, and each multi-element LED includes 3 LED beads, then the number of output channels of the light source driver chip 22 should not be less than 3*M*N. If each multi-element LED includes 4 LED beads, then the number of output channels of the light source driver chip 22 should not be less than 4*M*N, and so on for other numbers, to ensure that each LED bead can receive precise current control. This design not only improves the flexibility of the light source module 20, but also enables fine adjustment of the light source brightness and color by precisely controlling the current of each LED, thereby achieving energy saving and improving image quality. This design allows the light source driver chip 22 to perform precise current control on each LED, thereby achieving fine adjustment of the light source brightness and color, in order to achieve energy saving and improve image quality.

[0078] Furthermore, by increasing the number of output channels, the light source driver chip 22 can support a larger number of LED beads, thereby meeting the display needs of different scenarios. The use of the light source driver chip 22 also helps reduce the overall size of the light source module 20, making the projection device more compact and easier to integrate into various devices, such as smart wearable devices. Through this design, the projection device can provide clearer and more vivid image display effects while reducing power consumption and heat generation, effectively avoiding thermal defocusing problems and ensuring image quality.

[0079] Optionally, refer to Figure 8 In another embodiment of the present invention, a projection device is provided, based on the above. Figures 1 to 6 In any of the embodiments shown, the image processing circuit 30 includes a video signal circuit 32 and an image processing chip 31, wherein:

[0080] The input terminal of the video signal circuit 32 is used to connect to a video signal source; the input terminal of the image processing chip 31 is connected to the output terminal of the video signal circuit 32, and the output terminal of the image processing chip 31 is electrically connected to the imaging component 10 and the light source module 20 respectively; the video signal circuit 32 is used to convert the video signal source into a signal format corresponding to the image processing chip 31, and the image processing chip 31 is used to convert the video signal converted by the video signal circuit 32 into an image signal and output it to the imaging component 10; the image processing chip 31 is also used to determine the light source area 21 to be turned on and the light source area 21 to be turned off in the light source module 20 according to the image signal, control the light source area 21 to be turned on in the light source module 20 to be in a light-emitting state, and control the light source area 21 to be turned off to remain in a closed state.

[0081] In the image processing circuit 30, the video signal circuit 32 can be a converter used to convert video signal sources of different formats into signal formats that the image processing chip 31 can process. The image processing chip 31 is responsible for receiving the converted video signal, converting it into an image signal, and then outputting it to the imaging component 10. The image processing chip can employ an FPGA (Field-Programmable Gate Array) chip to achieve efficient image processing and signal conversion. The image processing chip 31 is also responsible for analyzing the image content in the video signal source to determine which areas need to be displayed and which areas can have their light sources turned off, thereby achieving dynamic brightness and color control.

[0082] Through this design, the image processing circuit 30 can respond to changes in the video signal in real time and dynamically adjust the working state of the light source module 20 to achieve optimal image display and energy-saving effects. Furthermore, the image processing circuit 30 can integrate image enhancement algorithms, such as edge enhancement and color correction, to improve image quality and ensure the sharpness and color accuracy of the projected image. With these advanced image processing functions, the projection device can adapt to various complex display environments.

[0083] Optionally, refer to Figure 9 Another embodiment of the present invention provides a projection device based on the above. Figure 7 In the embodiment shown, the video signal circuit 32 includes:

[0084] The video signal conversion chip 321 has an input terminal for connecting to a video signal source and a differential output terminal connected to the second input terminal of the image processing circuit 30. The video signal conversion chip 321 is used to convert the video signal source into an image signal and output it to the image processing circuit 30.

[0085] The video signal conversion chip 321 can be a dedicated format conversion chip used to connect with external video sources, such as computer equipment, and convert the external video sources into MIPI format. Its design purpose is to convert different types of video signal sources into a unified format that the image processing circuit 30 can process. The differential output terminal of the video signal conversion chip 321 is connected to the second input terminal of the image processing circuit 30, ensuring stable signal transmission and high-quality conversion. Through this conversion, the video signal circuit 32 can be compatible with multiple video formats, such as HDMI, VGA, and DVI, enabling the projection device to be widely used in various display devices. The integration of the video signal conversion chip 321 not only simplifies the overall structure of the projection device but also improves signal processing efficiency and image quality.

[0086] Optionally, refer to Figure 10 Another embodiment of the present invention provides a projection device based on the above. Figure 8 In the embodiment shown, the projection device further includes:

[0087] The control circuit 40 is electrically connected to the video input device. The control terminal of the control circuit 40 is connected to the controlled terminal of the video signal conversion chip 321, and the output terminal of the control circuit 40 is connected to the third input terminal of the image processing circuit 30.

[0088] The control circuit 40 can be an MCU, used to receive control signals input by the user and adjust the operating modes of the video signal conversion chip 321 and the image processing circuit 30 according to these signals. For example, the user can select different display modes through the control circuit 40, such as standard mode, cinema mode, or game mode. In each mode, the image processing circuit 30 will adjust the brightness, contrast, and color saturation of the image according to preset parameters to achieve the best viewing effect.

[0089] The present invention also proposes a smart wearable device, which includes a projection device as described in the above embodiments.

[0090] It is worth noting that since the smart wearable device of the present invention is based on the above-mentioned projection device, the embodiments of the smart wearable device of the present invention include all the technical solutions of all the embodiments of the above-mentioned projection device, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0091] Alternatively, smart wearable devices include AR glasses, VR glasses, or MR glasses.

[0092] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A projection device, characterized in that, The projection device includes: An imaging component, the imaging component having a projection area, the projection area having multiple sub-projection areas; A light source module, wherein the light source module is provided with multiple light source areas corresponding to the multiple sub-projection areas, and the light source areas include light source areas to be turned on and light source areas to be turned off; An image processing circuit, having an input terminal for receiving video signals, is electrically connected to the imaging component and the light source module, respectively. The image processing circuit is used to convert the input video signal into an image signal and output it to the imaging component; The image processing circuit is further configured to determine, based on the image signal, the light source area to be turned on and the light source area to be turned off in the light source module, control the light source area to be turned on in the light source module to be in a light-emitting state, and control the light source area to be turned off to remain in a closed state. The image processing circuit is used to analyze the RGB color threshold of each light source area corresponding to the image signal. When the RGB color thresholds of the light source area corresponding to the image signal are all lower than the preset color threshold, the light source area is controlled to remain in the off state. When at least one of the RGB color thresholds of the light source area corresponding to the image signal is not less than the preset color threshold, the light source area is controlled to be in the light-emitting state.

2. The projection device as described in claim 1, characterized in that, The imaging component includes: A reflective screen, wherein the differential signal terminal of the reflective screen is connected to the first output terminal of the image processing circuit, and the enable output terminal of the reflective screen is connected to the first input terminal of the image processing circuit, or the enable output terminal of the reflective screen is connected to the enable terminal of the light source module, and the reflective screen is used to reflect the light source emitted by the light source module to display the image signal.

3. The projection device as described in claim 1, characterized in that, The light source module includes M*N multi-element LEDs, each of which is disposed in one of the light source areas. Each multi-element LED includes 3 or 4 LED beads, and each multi-element LED includes at least red, green and blue LED beads.

4. The projection device as described in claim 3, characterized in that, The light source module also includes: A light source driver chip, wherein the controlled terminal of the light source driver chip is connected to the second output terminal of the image processing circuit; and the output terminal of the light source driver chip is electrically connected to each of the multi-element LEDs. The light source driver chip is used to drive the multi-element LED to either be in a light-emitting state or remain in a closed state according to the control signal output by the image processing circuit.

5. The projection device as described in claim 4, characterized in that, The number of output channels of the light source driver chip is not less than the number of the lamp beads.

6. The projection device according to any one of claims 1 to 5, characterized in that, The image processing circuit is also used to determine the RGB color threshold of the image signal and control the corresponding light source area to be turned on to light up the corresponding color light signal.

7. The projection device according to any one of claims 1 to 5, characterized in that, The image processing circuit is also used to analyze the brightness information of each light source area corresponding to the RGB color threshold of the image signal, and control the current of the light source area in the light-emitting state to control the brightness of the light source area.

8. The projection device according to any one of claims 1 to 5, characterized in that, The image processing circuit is also used to determine the RGB color threshold of the image signal and compensate the current signal output to the light source module to improve the contrast of the image signal on the imaging component.

9. The projection device according to any one of claims 1 to 5, characterized in that, The image processing circuit includes: A video signal circuit, wherein the input terminal of the video signal circuit is used to connect to a video signal source; An image processing chip, wherein the input terminal of the image processing chip is connected to the output terminal of the video signal circuit, and the output terminal of the image processing chip is electrically connected to the imaging component and the light source module respectively; The video signal circuit is used to convert the video signal source into a signal format corresponding to the image processing chip. The image processing chip is used to convert the video signal converted by the video signal circuit into an image signal and output it to the imaging component. The image processing chip is also used to determine the light source area to be turned on and the light source area to be turned off in the light source module according to the image signal, control the light source area to be turned on in the light source module to be in the light-emitting state, and control the light source area to be turned off to remain in the off state.

10. The projection device as claimed in claim 9, characterized in that, The video signal circuit includes: A video signal conversion chip is provided, wherein the input terminal of the video signal conversion chip is used to connect to a video signal source, the differential output terminal of the video signal conversion chip is connected to the second input terminal of the image processing circuit, and the video signal conversion chip is used to convert the video signal source into the image signal and output it to the image processing circuit.

11. The projection device as claimed in claim 10, characterized in that, The projection device further includes: A control circuit is electrically connected to the video input device. The control terminal of the control circuit is connected to the controlled terminal of the video signal conversion chip, and the output terminal of the control circuit is connected to the third input terminal of the image processing circuit.

12. A smart wearable device, characterized in that, The smart wearable device includes a projection device as described in any one of claims 1-11.

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