Projection device and intelligent wearable equipment

Abstract

The invention provides a projection device and intelligent wearable equipment, and relates to the technical field of intelligent wearable equipment, and the projection device comprises an imaging assembly which is provided with a projection area, and the projection area is provided with a plurality of sub-projection areas; the light source module is provided with a plurality of light source areas corresponding to the plurality of sub-projection areas one by one; the image processing circuit is provided with an input end for accessing an image signal, and the image processing circuit is electrically connected with the imaging component and the light source module respectively; the image processing circuit is used for outputting an image signal to the imaging assembly; the image processing circuit is further used for controlling each light source area to be in a light emitting state or a light emitting stopping state according to the image signal. The light source brightness and the light source color of the light source area corresponding to each sub-projection area can be effectively controlled, and because the imaging assembly and the light source module are arranged in different areas, when the color of any area is black, the light source of the corresponding light source area can be turned off, so that the power consumption of the light source module can be reduced, and the heat generated by the light source can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of smart wearable devices, and in particular to a projection device and a smart wearable device. Background Art

[0002] The projection device is composed of an imaging component and a light source, wherein the light source is processed through a series of optical designs, such as collimation and uniform light treatment, to ensure that the light can be evenly projected to the imaging component. The imaging component is usually a reflective display screen, which reflects light to a predetermined position through precise adjustment of pixel units, thereby presenting a color image composed of a mixture of RGB colors. However, in the prior art, due to the high power consumption of the light source component, it generates a lot of heat, which easily causes phenomena such as thermal defocusing, thereby having a negative impact on the imaging quality. Summary of the invention

[0003] The main purpose of the present invention is to provide a projection device, aiming to reduce the problem of poor imaging quality caused by thermal defocusing due to heat generated by a light source in the projection device.

[0004] To achieve the above object, the present invention provides a projection device, comprising: An imaging component, wherein the imaging component has a projection area, and the projection area has a plurality of sub-projection areas; A light source module, wherein the light source module is provided with a plurality of light source areas corresponding to the plurality of sub-projection areas in a one-to-one correspondence; An image processing circuit, the image processing circuit having an input terminal for receiving a video signal, the image processing circuit being 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 also used to determine the light source areas to be turned on and the light source areas to be turned off in the light source module according to the image signal, control the light source areas to be turned on in the light source module to be in a light emitting state, and control the turned off light source areas to remain in a turned off state.

[0005] Optionally, the image processing circuit is used to analyze the RGB color threshold of each of the light source areas corresponding to the image signal, and when the RGB color thresholds of the light source areas corresponding to the image signals are all lower than preset color thresholds, the light source areas are controlled to remain in a closed state; when at least one of the RGB color thresholds of the light source areas corresponding to the image signals is not less than a preset color threshold, the light source areas are controlled to be in a light emitting state.

[0006] Optionally, the imaging component comprises: A reflective screen, wherein the differential signal end of the reflective screen is connected to the first output end of the image processing circuit, the enable output end of the reflective screen is connected to the first input end of the image processing circuit, or the enable output end of the reflective screen is connected to the enable end 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.

[0007] Optionally, the light source module includes M*N multiple LEDs, each of the multiple LEDs is arranged in a corresponding light source area, each of the multiple LEDs includes 3 LED lamp beads or 4 LED lamp beads, and each of the multiple LEDs includes at least red, green and blue lamp beads.

[0008] Optionally, the light source module further includes: A light source driving chip, wherein a controlled end of the light source driving chip is connected to the second output end of the image processing circuit; and an output end of the light source driving chip is electrically connected to each of the multiple LEDs respectively; The light source driving chip is used to drive the multiple LEDs to be in a light emitting state or remain in an off state according to a control signal output by the image processing circuit.

[0009] Optionally, the number of output channels of the light source driving chip is not less than the number of the lamp beads.

[0010] Optionally, the image processing circuit is further 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 a light signal of a corresponding color.

[0011] Optionally, the image processing circuit is further used 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.

[0012] Optionally, the image processing circuit is further 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.

[0013] Optionally, the image processing circuit includes: A video signal circuit, wherein the input end of the video signal circuit is used to access a video signal source; An image processing chip, wherein the input end of the image processing chip is connected to the output end of the video signal circuit, and the output end 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, and 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 a light emitting state, and control the turned-off light source area to remain in a turned-off state.

[0014] Optionally, the video signal circuit includes: A video signal conversion chip, wherein the input end of the video signal conversion chip is used to access a video signal source, the differential output end of the video signal conversion chip is connected to the second input end 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.

[0015] Optionally, the projection device further includes: A control circuit is electrically connected to the video input device, a control end of the control circuit is connected to a controlled end of the video signal conversion chip, and an output end of the control circuit is connected to a third input end of the image processing circuit.

[0016] In addition, to achieve the above-mentioned purpose, the present invention also provides a smart wearable device, including the projection device as described above.

[0017] The embodiment of the present invention is provided with an imaging component and a light source module, which are electrically connected to the image processing circuit respectively, and the projection area of ​​the imaging component is divided to form a plurality of sub-projection areas. The light source module is provided with a plurality of light source areas corresponding to the sub-projection areas one by one, so that the image signal is connected to the image processing circuit for processing 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 stop emitting light state according to the image signal, thereby effectively controlling the light source brightness and light source color of the light source area corresponding to each sub-projection area to achieve accurate image display, and since the imaging component and the light source module are both arranged in partitions, 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 imaging quality caused by thermal defocus. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative labor.

[0020] Figure 1 is a circuit structure block diagram of a projection device according to an embodiment of the present invention; Figure 2 for Figure 1 A circuit structure diagram of the light source module and imaging component; Figure 3 for Figure 1 A schematic diagram of the effect of the image processing circuit controlling the light source module; Figure 4 for Figure 1 A schematic diagram showing the effect of the image processing circuit controlling the red lamp beads of the light source module to emit light; Figure 5 is a circuit structure block diagram of a projection device according to another embodiment of the present invention; Figure 6 A circuit structure block diagram of a projection device according to another embodiment of the present invention; Figure 7 A circuit structure block diagram of a projection device according to another embodiment of the present invention; Figure 8 A circuit structure block diagram of a projection device according to another embodiment of the present invention; Fig. 9 is a circuit structure block diagram of a projection device according to another embodiment of the present invention; Fig.10 FIG. 4 is a circuit structure block diagram of a projection device according to another embodiment of the present invention.

[0021] Description of Figure Numbers:

[0022] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0023] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, and well-known modules, units and their connections, links, communications or operations are not shown or described in detail. Moreover, the described features, architectures or functions can be combined in any way in one or more embodiments.

[0024] The projection device is composed of an imaging component and a light source, wherein the light source is processed through a series of optical designs, such as collimation and uniform light treatment, to ensure that the light can be evenly projected to the imaging component. The imaging component is usually a reflective display screen, which reflects light to a predetermined position through precise adjustment of the pixel unit, thereby presenting a color image composed of a mixture of RGB colors. However, the power consumption of the light source component in the prior art is high, which causes it to generate a lot of heat, which makes the cost of the heat dissipation design high. If the heat dissipation problem is not handled properly, it may also cause phenomena such as thermal defocusing, which has a negative impact on the imaging quality.

[0025] The main solution of the embodiment of the present application is: by providing an imaging component and a light source module, and then electrically connecting them to the image processing circuit respectively, and dividing the projection area of ​​the imaging component to form a plurality of sub-projection areas, the light source module is provided with a plurality of light source areas corresponding to the sub-projection areas one by one, so that the image signal is connected to the image processing circuit for processing 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 stop emitting light state according to the image signal.

[0026] The present application provides a solution that can effectively control the light source brightness and light source color of the light source area corresponding to each sub-projection area to achieve accurate image display. Moreover, 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 and the heat generated by the light source, thereby reducing the problem of poor imaging quality caused by thermal defocus.

[0027] It should be noted that the projection device of this embodiment can be used in various smart wearable devices, such as smart glasses, head-mounted displays, etc. 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 keeping the device light and comfortable. In head-mounted displays, the projection device can provide a wide field of view and high-definition images, which is suitable for application scenarios such as games, virtual reality (VR), and professional simulation training.

[0028] 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: The imaging component 10 has a projection area, and the projection area has multiple sub-projection areas 11; the light source module 20 is provided with multiple light source areas 21 corresponding to the multiple sub-projection areas 11; the image processing circuit 30 has an input end for accessing the video signal, 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 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 turned off light source area 21 to remain in a turned off state.

[0029] 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 be integrated with an image enhancement algorithm to optimize the image quality, such as through dynamic contrast adjustment, color correction, and edge sharpening. The image processing circuit 30 may be an FPGA or other dedicated image processing chip 31.

[0030] In the projection device, the imaging component 10 is divided into a plurality of sub-projection areas 11, and the light source module 20 is correspondingly divided into a plurality of light source areas 21 arranged corresponding to the sub-projection areas 11, and 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. And it is electrically connected to the imaging component 10 and the light source module 20 respectively through the image processing circuit 30. The image processing circuit 30 can convert the received video signal into an image signal, and according to the characteristics of the image signal, it can be an RGB color threshold, so as 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, that is, the multiple light source areas 21 in the light source module 20 are classified into the light source area 21 to be turned on and the light source area 21 to be turned off. Generally, the light source area 21 to be turned off is the light source area 21 with a color threshold of black, and the light source area 21 to be turned on is a variety of non-black color areas, and is formed by mixing the three primary colors of red, green and blue, so as to 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. Figure 3 As shown, Figure 3is the color threshold information corresponding to the image signal, where the A1 and A5 areas have RGB colors, and the three are superimposed, so that the A1 and A5 areas are white, and other areas are black. Then the A1 and A5 areas are the light source areas 21 to be turned on, and they need to be controlled to be in the light emitting state, while other areas except A1 and A5 need to remain in the closed state to maintain the black state, thereby reducing the power consumption of the light source module 20 and the heat generated by the light source, thereby reducing the problem of poor imaging quality caused by thermal defocus. Figure 4 As shown, Figure 4 Only the red LED beads in the A5 area are lit, that is, only the color threshold of the R color in the A5 area reaches the preset value. At this time, the A5 area of ​​the light source module 20 is controlled to be in a light-emitting state, and the color is red, and other light source areas 21 outside the A5 area remain in the off state.

[0031] Compared with the prior art, the prior art solutions often improve the heat sink of the light source module 20, and the design cost of the heat sink is often relatively high, and the problem of overheating of the light source module 20 cannot be completely solved. However, the present embodiment divides the light source module 20 into a plurality of light source areas 21, so as to better control the light source area 21 to be turned on to be in a light emitting state, and control the light source area 21 to be turned off to remain in a turned off state, thereby reducing the heat generated by the light source at the root, thereby reducing the problem of poor imaging quality caused by thermal defocus.

[0032] Optionally, the image processing circuit 30 is used to analyze the RGB color thresholds 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 thresholds, 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.

[0033] When the image processing circuit 30 controls the light source area 21 to remain in the off state or in the light emitting state, the RGB color threshold value of each light source area 21 corresponding to the image signal is analyzed. When the RGB color threshold values ​​of each pixel in any light source area 21 are low, for example, closer to the black threshold value, it means that the area is darker, and the black display can be achieved by turning off the light source of the light source area 21. The black threshold value can be set according to actual needs. For example, when the RGB threshold values ​​are all set to be lower than 10, that is, less than (10, 10, 10), they are set to black, or they can be set to (10, 10, 20). The setting of the color threshold value can be determined according to actual conditions.

[0034] Optionally, the image processing circuit 30 is further 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 light signal of the corresponding color.

[0035] When at least one color threshold value among the RGB color threshold values ​​of the light source area 21 corresponding to the image signal is not less than the preset color threshold value, the light source area 21 is controlled to be in a light-emitting state, for example, the red threshold value, whose preset color threshold value is 50, is not less than 50, the light source area 21 is controlled to be in a light-emitting state, for example, the color threshold value is (50, 0, 0), and the corresponding red color is displayed, or multiple color threshold values ​​meet the requirements, for example, the color threshold value is (60, 80, 112), and the corresponding mixed color is displayed, thereby realizing multi-color display. In this way, the image processing circuit 30 can accurately control the brightness and color of each light source area 21 to achieve a more sophisticated image display effect.

[0036] Optionally, the image processing circuit 30 is further 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 .

[0037] In the process of brightness control, the current of the light source in each light source area 21 is mainly controlled. For example, when the light source is an LED lamp bead, the current of the LED lamp bead is controlled to adjust the brightness of the corresponding light source area 21, so as to achieve fine adjustment of the image brightness. For example, when the brightness information of the light source area 21 corresponding to the image signal indicates that a darker display effect is required, the image processing circuit 30 will reduce the current passing through the LED lamp bead in this area to reduce the brightness; conversely, if a brighter display effect is required, 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 meet the display requirements of different scenes and content.

[0038] Optionally, the image processing circuit 30 is further used to determine the RGB color threshold of the image signal and compensate the current signal output to the light source module 20 to improve the contrast of the image signal on the imaging component 10 .

[0039] In the process of realizing the corresponding output of the light source and the image signal, in order to make the output image color more vivid, the image processing circuit 30 will compensate according to the RGB color threshold of the image signal to enhance the contrast and color saturation of the image. For example, if the image signal shows that the red threshold of a certain area is higher, while the green and blue thresholds are lower, the image processing circuit 30 will increase the current output of the red channel accordingly, while reducing the current output of the green and blue channels, so as to enhance the display effect of red and make the image more vivid and bright. This compensation mechanism can ensure that the projected image can maintain a high color reproduction and contrast even in a dark or bright environment, thereby providing a better visual experience.

[0040] The present embodiment is provided with an imaging component 10 and a light source module 20, which are electrically connected to an image processing circuit 30 respectively, and the projection area of ​​the imaging component 10 is divided to form a plurality of sub-projection areas 11. The light source module 20 is provided with a plurality of light source areas 21 corresponding to the sub-projection areas 11, so that an image signal is connected to the image processing circuit 30 for processing and then output to the imaging component 10, or the image processing circuit 30 controls each light source area 21 to be in a light emitting state or stop emitting light according to the image signal, thereby effectively controlling the light source brightness and light source color of the light source area 21 corresponding to each sub-projection area 11, and realizing accurate image display. Moreover, since the imaging component 10 and the light source module 20 are both arranged in partitions, 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 imaging quality caused by thermal defocus.

[0041] Optionally, refer to Figure 5 Another embodiment of the present invention provides a projection device, based on the above Figure 1 In the illustrated embodiment, the imaging assembly 10 includes a reflective screen 12, wherein: The differential signal end of the reflective screen 12 is connected to the first output end of the image processing circuit 30, the enable output end of the reflective screen 12 is connected to the first input end of the image processing circuit 30, or the enable output end of the reflective screen 12 is connected to the enable end 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 the image signal.

[0042] In this embodiment, the reflective screen 12 can be a liquid crystal display panel (LCD) or a digital micromirror device (DMD). The differential signal end of the reflective screen 12 receives a signal from the image processing circuit 30 to control the reflective characteristics of the screen, and the enable output end is used to control the enabled state of the screen. When the image processing circuit 30 determines that the image signal of a certain area is black, the reflective function of the corresponding area can be turned off by controlling the enable output end, thereby reducing unnecessary light source consumption, and can better reduce power consumption and heat generation. In addition, by accurately 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 and provide a clearer and more vivid image display effect.

[0043] 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: Each multi-element LED is correspondingly arranged in a light source area 21 , each multi-element LED includes 3 LED lamp beads or 4 LED lamp beads, and each multi-element LED includes at least red, green and blue lamp beads.

[0044] The light source module 20 is as follows Figure 5 As shown in , it is divided into M*N, and Figure 5 The picture shows three LED lamp beads, from left to right they are red, green and blue. In actual use, the three lamp beads are packaged together, that is, Figure 5 The three partitions shown are overlapped one by one, and three lamp beads or four lamp beads are packaged to form a multi-element LED. If there are three lamp beads, they are RGB lamp beads, and if there are four lamp beads, they can be RGBR lamp beads, RGBG lamp beads or RGBB lamp beads. In this embodiment, RGBG lamp beads are used when there are four lamp beads.

[0045] By setting the multi-element LED and the light source area 21 in a one-to-one correspondence, each multi-element LED can be independently controlled to achieve precise adjustment of different colors and brightness. The use of multi-element LEDs not only improves the flexibility and adaptability of the light source, but also can achieve fine adjustment of the brightness and color of the light source by accurately controlling the current of each LED lamp bead, thereby achieving energy saving and improving image quality. In addition, the packaging design of the multi-element LED helps to reduce the volume of the overall light source module 20, making the projection device more compact and easy to integrate into various devices, such as smart wearable devices.

[0046] Optionally, refer to Figure 7 Another embodiment of the present invention provides a projection device, based on the above Figure 5In the embodiment shown, the light source module 20 further includes a light source driver chip 22, wherein: The controlled end of the light source driver chip 22 is connected to the second output end of the image processing circuit 30; the output end of the light source driver chip 22 is electrically connected to each multi-element LED respectively; the light source driver chip 22 is used to drive the multi-element LED to be in a light-emitting state or remain in an off state according to the control signal output by the image processing circuit 30.

[0047] The light source driver chip 22 may be a switch driver chip, which can accurately control the current of each multi-element LED according to the instruction 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 improved to drive the multi-element LED to work better. The use of the light source driver chip 22 makes the current control of each multi-element LED more accurate, thereby achieving fine adjustment of the brightness and color of the light source.

[0048] 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 meet different image display requirements. For example, when a darker scene needs to be displayed, the current of the multi-element LED can be reduced to reduce the brightness; and when a bright scene needs to be displayed, the current is increased to increase the brightness. Through this dynamic adjustment, the contrast and color saturation of the projected image can be effectively improved.

[0049] Optionally, the number of output channels of the light source driving chip 22 is not less than the number of lamp beads.

[0050] The light source driver chip 22 needs to be connected one by one with the LED lamp beads packaged in the multi-element LED for control, to ensure that each LED lamp bead can be independently adjusted according to the needs of the image signal. For example, if the multi-element LED contains four LED lamp beads, then the light source driver chip 22 should have at least four output channels, and each channel corresponds to an LED lamp bead. Moreover, it is necessary to set it corresponding to the M*N multi-element LEDs of the light source module 20. For example, the light source module 20 includes M*N multi-element LEDs, and each multi-element LED includes 3 LED lamp beads. Then the number of output channels of the light source driver chip 22 is not less than 3*M*N. If each multi-element LED includes 4 LED lamp beads, then the number of output channels of the light source driver chip 22 is not less than 4*M*N. The same is true for other numbers, to ensure that each LED lamp bead can obtain accurate current control. This design not only improves the flexibility of the light source module 20, but also can achieve fine adjustment of the brightness and color of the light source by accurately controlling the current of each LED lamp bead, 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 lamp bead, thereby achieving fine adjustment of the brightness and color of the light source, thereby achieving energy saving and improving image quality.

[0051] In addition, by increasing the number of output channels, the light source driver chip 22 can support a larger number of LED lamp beads, thereby meeting the display requirements in different scenarios. And due to the use of the light source driver chip 22, it also helps to reduce the volume of the overall light source module 20, making the projection device more compact and easy to integrate into various devices, such as smart wearable devices. Through this design, the projection device can provide a clearer and more vivid image display effect, while reducing power consumption and heat generation, effectively avoiding the problem of thermal defocus, and ensuring imaging quality.

[0052] Optionally, refer to Figure 8 Another embodiment of the present invention provides a projection device, based on the above Figures 1 to 6 In any of the illustrated embodiments, the image processing circuit 30 includes a video signal circuit 32 and an image processing chip 31, wherein: The input end of the video signal circuit 32 is used to connect to the video signal source; the input end of the image processing chip 31 is connected to the output end of the video signal circuit 32, and the output end 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 turned off light source area 21 to remain in a turned off state.

[0053] In the image processing circuit 30, the video signal circuit 32 can be a converter for converting video signal sources of different formats into a signal format that can be processed by the image processing chip 31. The image processing chip 31 is responsible for receiving the converted video signal and converting it into an image signal, which is then output to the imaging component 10. Among them, the image processing chip can use 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 turn off the light source, thereby achieving dynamic brightness and color control.

[0054] 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 the best image display effect and energy saving effect. In addition, the image processing circuit 30 can also integrate image enhancement algorithms, such as edge enhancement, color correction, etc., to improve image quality and ensure the clarity and color accuracy of the projected image. Through these advanced image processing functions, the projection device can adapt to various complex display environments.

[0055] Optionally, refer to Fig. 9 Another embodiment of the present invention provides a projection device, based on the above Figure 7 In the illustrated embodiment, the video signal circuit 32 includes: The video signal conversion chip 321 has an input end for connecting to a video signal source, and a differential output end of the video signal conversion chip 321 is connected to a second input end 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.

[0056] The video signal conversion chip 321 can be a dedicated format conversion chip for connecting to an external video source, such as a computer device, and converting the external video source into a MIPI format. The purpose of its design is to convert different types of video signal sources into a unified format that can be processed by the image processing circuit 30. The differential output terminal of the video signal conversion chip 321 is connected to the second input terminal of the image processing circuit 30 to ensure stable transmission and high-quality conversion of the signal. Through this conversion, the video signal circuit 32 can be compatible with a variety of video formats, such as HDMI, VGA, DVI, etc., so that the projection device can be widely used in various display devices. The integration of the video signal conversion chip 321 not only simplifies the structure of the entire projection device, but also improves the efficiency of signal processing and image quality.

[0057] Optionally, refer to Fig.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 comprises: The control circuit 40 is electrically connected to the video input device, the control end of the control circuit 40 is connected to the controlled end of the video signal conversion chip 321 , and the output end of the control circuit 40 is connected to the third input end of the image processing circuit 30 .

[0058] The control circuit 40 may be an MCU, which is used to receive control signals input by the user and adjust the working 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, such as standard mode, cinema mode or game mode, through the control circuit 40. 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.

[0059] The present invention also provides a smart wearable device, which includes the projection device according to the above embodiment.

[0060] 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 technical solutions of all embodiments of the above-mentioned projection device, and the technical effects achieved are also exactly the same, which will not be repeated here.

[0061] Optionally, the smart wearable device includes AR glasses, VR glasses or MR glasses.

[0062] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A projection device, characterized in that: The projection device comprises: An imaging component, wherein the imaging component has a projection area, and the projection area has a plurality of sub-projection areas; A light source module, wherein the light source module is provided with a plurality of light source areas corresponding to the plurality of sub-projection areas in a one-to-one correspondence; An image processing circuit, the image processing circuit having an input terminal for receiving a video signal, the image processing circuit being 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 also used to determine the light source areas to be turned on and the light source areas to be turned off in the light source module according to the image signal, control the light source areas to be turned on in the light source module to be in a light emitting state, and control the turned off light source areas to remain in a turned off state.

2. The projection device according to claim 1, characterized in that: 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 a closed state; when at least one color threshold 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 a light emitting state.

3. The projection device according to claim 1, characterized in that: The imaging assembly comprises: A reflective screen, wherein the differential signal end of the reflective screen is connected to the first output end of the image processing circuit, the enable output end of the reflective screen is connected to the first input end of the image processing circuit, or the enable output end of the reflective screen is connected to the enable end 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.

4. The projection device according to claim 1, wherein: The light source module includes M*N multiple LEDs, each of which is correspondingly arranged in one of the light source areas, each of which includes 3 LED lamp beads or 4 LED lamp beads, and each of which includes at least red, green and blue lamp beads.

5. The projection device according to claim 4, characterized in that: The light source module also includes: A light source driving chip, wherein a controlled end of the light source driving chip is connected to the second output end of the image processing circuit; and an output end of the light source driving chip is electrically connected to each of the multiple LEDs respectively; The light source driving chip is used to drive the multiple LEDs to be in a light emitting state or remain in an off state according to a control signal output by the image processing circuit.

6. The projection device according to claim 5, characterized in that: The number of output channels of the light source driving chip is not less than the number of the lamp beads.

7. The projection device according to any one of claims 1 to 6, 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 light signal of the corresponding color.

8. The projection device according to any one of claims 1 to 6, characterized in that: The image processing circuit is also used 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.

9. The projection device according to any one of claims 1 to 6, 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.

10. The projection device according to any one of claims 1 to 6, characterized in that: The image processing circuit comprises: A video signal circuit, wherein the input end of the video signal circuit is used to access a video signal source; An image processing chip, wherein the input end of the image processing chip is connected to the output end of the video signal circuit, and the output end 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, and 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 a light emitting state, and control the turned-off light source area to remain in a turned-off state.

11. The projection device according to claim 10, characterized in that: The video signal circuit comprises: A video signal conversion chip, wherein the input end of the video signal conversion chip is used to access a video signal source, the differential output end of the video signal conversion chip is connected to the second input end 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.

12. The projection device according to claim 11, characterized in that: The projection device also includes: A control circuit is electrically connected to the video input device, a control end of the control circuit is connected to a controlled end of the video signal conversion chip, and an output end of the control circuit is connected to a third input end of the image processing circuit.

13. A smart wearable device, characterized in that: The smart wearable device comprises the projection device according to any one of claims 1-12.

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