A brightness control device based on a semi-transparent micro-motor system

Abstract

The present invention discloses a brightness control device based on a translucent micro-motor system; it comprises a backlight layer; a control panel is arranged at the bottom of the backlight layer; a light sensor is arranged at the side of the backlight layer; a sliding track is arranged above the backlight layer; a mobile platform is installed on the sliding track; a DC motor is arranged below the mobile platform; a DC power supply is arranged on the DC motor; a driving circuit is arranged above the mobile platform; a controller is arranged on the driving circuit; and a switching element is also arranged on the driving circuit. The present invention can effectively reduce the halo phenomenon at the edge of the target image and improve the image display quality by dynamically adjusting the lamp beads through the control panel. At the same time, the present invention can realize independent control of each lamp bead through the control panel, and can cope with the brightness requirements in different areas and meet the display requirements of high-brightness images.

Description

Technical Field

[0001] The invention relates to the field of display technology, and in particular to a brightness control device based on a semi-transparent micro-motor system. Background Art

[0002] With the rapid development of liquid crystal display technology, direct backlight (mini LED) display screens have gradually become the mainstream of display technology due to their high brightness and excellent color performance. However, due to the use of a large number of independently controlled lamp beads and the cutting design of the LCD backlight layer, the display screen is prone to obvious halo phenomenon in the edge area.

[0003] The cause of halo is the uneven distribution of light sources. In direct backlight, LED lamp beads are usually located under the entire panel of the display. When the display content is darker, especially when displaying black or dark images, the LED lamp beads at the edge may still emit light, causing the light to spread inward from the edge, forming a halo.

[0004] In addition, the existing backlight display screen dimming area division is rough, the division of local dimming areas is too simple, the upper limit of the brightness of the lamp beads is the brightness of the backlight panel, there is a lack of amplification of the highlight area, and it is impossible to achieve obvious light and dark contrast.

[0005] Therefore, there is an urgent need for a brightness control device based on a semi-transparent micro-motor system to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a brightness control device based on a semi-transparent micro-motor system to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solution: a brightness control device based on a semi-transparent micro-motor system, comprising:

[0008] A backlight layer; a control panel is arranged at the bottom of the backlight layer; a light sensor is arranged at the side of the backlight layer; a sliding track is arranged above the backlight layer; a moving platform is installed on the sliding track; a DC motor is arranged below the moving platform; a DC power supply is arranged on the DC motor; a driving circuit is arranged above the moving platform; a controller is arranged on the driving circuit; and a switching element is also arranged on the driving circuit.

[0009] Preferably, the operating method of the brightness control device based on the translucent micro-motor system comprises the following steps:

[0010] Step A: The control panel processes the display information input by the user or the information obtained through the analysis of the optical sensor to obtain basic parameters;

[0011] Step B: Process the obtained basic parameters using image processing technology to identify high-brightness areas and areas where halo phenomena occur in the target image, and divide areas of different brightness;

[0012] Step C: Use the image analysis algorithm to calculate the specific brightness value required for each divided area and generate a control instruction list;

[0013] Step D: The light sensor monitors the actual brightness of different divided areas in real time, and feeds back to the control panel to provide the current actual brightness value of the lamp beads and the brightness of the halo area;

[0014] Step E: The control panel uses the specific brightness value calculated by the image analysis algorithm and the actual brightness value fed back by the light sensor to calculate the adjusted brightness value and position adjustment decision of each lamp bead using the linear interpolation and weighted average method. The adjusted brightness value is obtained by the following calculation:

[0015] Adjust brightness value = target brightness value - actual brightness value;

[0016] Step F: Get the target state of each lamp bead by adjusting the brightness value and position adjustment decision, and update the target state to the control instruction list for execution;

[0017] Step G: The control panel transmits the control signal to the controller and the switch element through the driving circuit, and the controller and the switch element control the DC motor to complete the position movement and brightness adjustment of the lamp beads;

[0018] Preferably, the operation method further comprises the following steps:

[0019] Step H: After executing the command, the control panel continues to monitor the actual brightness value fed back from the light sensor, and determines whether the actual brightness value reaches the target brightness value or there is a halo area; if it is detected that there is a deviation between the actual brightness value and the target brightness value or there is a halo area, the control panel recalculates and adjusts the brightness value and position adjustment decision, and sends control information to the driving circuit to adjust the brightness and position of the lamp beads;

[0020] Step I: The control panel continuously adjusts the brightness and position of the lamp beads according to the feedback from the light sensor until the actual brightness value of the lamp beads is equal to the target brightness value and there is no halo area.

[0021] Preferably, in step A, the display information input by the user or the information obtained through analysis by the optical sensor is processed by formatting and standardizing.

[0022] Preferably, the image processing technology in step B is an edge detection algorithm, a grayscale histogram algorithm, a brightness balance algorithm, and a region segmentation algorithm.

[0023] Preferably, the specific content of the control instruction list in step C is the target brightness of each area and the corresponding lamp bead status.

[0024] Preferably, the image analysis algorithm in step C is:

[0025]

[0026] Among them, Gray=a1·R+a2·G+a3·B,

[0027] Where Gray is the gray value of a pixel, a1, a2, a3 are weights and a1+a2+a3=1, R, G, B are the pixel values ​​of the red, green, and blue channels, and B x is the brightness requirement of the xth region, N is the number of pixels in the region, Gray i is the gray value of the i-th pixel.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] 1. The present invention can effectively reduce the halo phenomenon at the edge of the target image and improve the image display quality by dynamically adjusting the lamp beads through the control panel.

[0030] 2. The present invention realizes independent control of each lamp bead through a control panel, can cope with the brightness requirements in different areas, and meet the display requirements of high-brightness images. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0032] Figure 2 It is a structural schematic diagram of an enlarged area A of an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of a light bulb according to an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the internal structure of a light bulb according to an embodiment of the present invention.

[0035] In the figure: 10, lamp beads; 11, DC motor; 12, moving platform; 13, driving circuit; 14, controller; 15, switching element; 16, DC power supply; 17, light sensor; 18, sliding track; 20, backlight layer; 21, control panel. DETAILED DESCRIPTION

[0036] In order to solve the problems described in the background technology, the embodiment of the present invention provides a brightness control device based on a translucent micro-motor system. The technical scheme in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiment of the present invention, not all of the embodiments. Based on the embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-4 This embodiment provides a brightness control device based on a semi-transparent micro-motor system.

[0038] A backlight layer 20; a control panel 21 is provided at the bottom of the backlight layer 20; a light sensor 17 is provided on the side of the backlight layer 20; a sliding track 18 is provided above the backlight layer 20; a moving platform 12 is installed on the sliding track 18; a DC motor 11 is provided below the moving platform 12; a DC power supply 16 is provided on the DC motor 11; a driving circuit 13 is provided above the moving platform 12; a controller 14 is provided on the driving circuit 13; a switching element 15 is also provided on the driving circuit 13.

[0039] The DC motor 11 is responsible for controlling the movement of a lamp bead 10. The DC motor 11 has a high-precision positioning function, which can ensure the accurate positioning of the lamp bead 10.

[0040] Mobile platform 12: Each lamp bead 10 is fixed on the DC motor 11 through the mobile platform 12. The mobile platform 12 is designed as an adjustable structure, which can move within a certain range to ensure flexible adjustment of the lamp bead 10 in the vertical and horizontal directions.

[0041] Driving circuit 13: Each DC motor 11 is connected to the control panel 21 through the driving circuit 13, which is responsible for receiving the control signal and converting it into an electrical signal for transmission. A DC power supply 16DC is used for power supply, and the voltage is determined according to the specifications of the DC motor 11. A pulse width modulation PWM controller 14 is used to adjust the speed and direction of the DC motor 11. An insulated gate bipolar transistor IGBT switching element 15 is used to amplify the control signal from the control panel 21 and drive the DC motor 11.

[0042] Light sensors 17 are installed at different positions of the backlight layer 20 to detect the light intensity and distribution in different areas in real time and provide feedback data to the control panel 21 .

[0043] Sliding track 18: In the arrangement of the array of lamp beads 10, a sliding track 18 is constructed. Each lamp bead 10 is fixed on a moving platform 12 that moves along the sliding track 18, so that the lamp bead 10 can move smoothly along the sliding track 18 when the DC motor 11 moves.

[0044] Movement controlled by DC motor 11: Each DC motor 11 unit can independently control the movement position of the connected lamp bead 10, and the maximum movement distance is less than the interval between pixels to prevent collision. For example, when the brightness of a certain area needs to be enhanced, the relevant lamp bead 10 can be moved toward the target area, close to the highlight area, to increase the light output of the area. On the contrary, in other areas with lower demand, the lamp bead 10 can be moved away from the highlight area to reduce light output. At the junction of the black or dark image area and the highlight area, the pixels are moved according to the principle of the farthest path to reduce the generation of halos.

[0045] Specifically, a method for operating a brightness control device based on a semi-transparent micro-motor system includes:

[0046] Step A: The control panel 21 processes the display information input by the user or the information analyzed by the optical sensor 17 to obtain basic parameters;

[0047] The user can set the brightness, contrast and other display parameters through the control panel 21.

[0048] The control panel 21 can also analyze the brightness and color information of the current display content through the automatic detection function using the light sensor 17. For example, the system can analyze the frame image of a video and identify the area with higher brightness and the darker area.

[0049] Step B: Process the obtained basic parameters using image processing technology to identify high-brightness areas (such as highlighted objects, text, etc.) and areas that produce halo phenomena in the target image, and divide areas of different brightness;

[0050] Step C: Use the image analysis algorithm to calculate the specific brightness value required for each divided area and generate a control instruction list;

[0051] Step D: The light sensor 17 monitors the actual brightness of different divided areas in real time, and feeds back to the control panel 21 to provide the current actual brightness value of the lamp bead 10 and the brightness of the halo area;

[0052] Step E: The control panel 21 calculates the specific brightness value calculated by the image analysis algorithm and the actual brightness value fed back by the light sensor 17, and uses the linear interpolation and weighted average method to calculate the adjusted brightness value and position adjustment decision of each lamp bead 10. The adjusted brightness value is calculated as follows:

[0053] Adjust brightness value = target brightness value - actual brightness value;

[0054] Step F: By adjusting the brightness value and the position adjustment decision, the target state of each lamp bead 10 is obtained, and the target state is updated to the control instruction list for execution;

[0055] The position adjustment decision is specifically that for the identified highlight area, the control panel 21 sends a control signal to the corresponding lamp bead 10, increases its brightness and calculates the distance the lamp bead 10 should move toward the highlight area. Conversely, for the halo area, the control panel 21 sends a control signal to the corresponding lamp bead 10, reduces its brightness and calculates the distance the lamp bead 10 should move away from the halo area.

[0056] Step G: The control panel 21 transmits the control signal to the controller 14 and the switch element 15 through the driving circuit 13 , and the controller 14 and the switch element 15 control the DC motor 11 to complete the position movement and brightness adjustment of the lamp bead 10 .

[0057] Specifically, it also includes:

[0058] Step H: After executing the command, the control panel 21 continues to monitor the actual brightness value fed back from the light sensor 17, and determines whether the actual brightness value reaches the target brightness value or there is a halo area; if it is detected that there is a deviation between the actual brightness value and the target brightness value or there is a halo area, the control panel 21 recalculates the adjustment brightness value and position adjustment decision, and sends control information to the driving circuit 13 to adjust the brightness and position of the lamp bead 10;

[0059] Repositioning: The image display process is a process of continuous pixel brightness and color adjustment. Therefore, in order to achieve continuous increase in highlight and reduction of halo, the pixel points need to continuously move and change their positions, so all the pixels need to be accurately positioned. This invention adopts the idea of ​​integration (converting continuity to discontinuity): a coordinate system is established with the center of the pixel grid array as the origin, the horizontal direction as the x-axis, and the vertical direction as the y-axis. Suppose the initial coordinates of a certain pixel point (x0, y 0) , the horizontal movement change is Δx, and the vertical movement change is Δy, then the coordinates of the control pixel after right shift are (x0+Δx,y 0) Similarly, the coordinates after left shift are (x0-Δx,y 0) ; The coordinates of the pixel after moving up are (x0, y0+Δy), and the coordinates after moving down are (x0, y0-Δy). By recording the coordinates after each pixel change, the current position of each pixel can be accurately located.

[0060] Step I: The control panel 21 continuously adjusts the brightness and position of the lamp bead 10 according to the feedback from the light sensor 17 until the actual brightness value of the lamp bead 10 is equal to the target brightness value and no halo area exists.

[0061] Specifically, in step A, the display information input by the user or the information analyzed by the optical sensor 17 is processed by formatting and standardizing.

[0062] The purpose of the formatting and standardization processing is to ensure the accuracy and consistency of the input signal.

[0063] Specifically, the image processing technology in step B is an edge detection algorithm, a grayscale histogram algorithm, a brightness balance algorithm, and a region segmentation algorithm.

[0064] The purpose of edge detection algorithm: The edge detection algorithm is used to identify the outline and edges of objects, such as text characters or highlighted objects.

[0065] The purpose of the grayscale histogram algorithm is to understand the brightness distribution in the image and determine which areas need to be enhanced.

[0066] Purpose of brightness equalization algorithm: In the image content, there may be some areas with too high or too low brightness. The brightness equalization algorithm can help eliminate these unevenness.

[0067] Purpose of the region segmentation algorithm: The control panel 21 needs to divide the image into multiple regions so as to independently control the brightness of each region.

[0068] Specifically, the specific content of the control instruction list in step C is the target brightness of each area and the corresponding status of the lamp bead 10.

[0069] Specifically, the image analysis algorithm in step C is:

[0070]

[0071] Among them, Gray=a1·R+a2·G+a3·B,

[0072] Where Gray is the gray value of a pixel, a1, a2, a3 are weights and a1+a2+a3=1, R, G, B are the pixel values ​​of the red, green, and blue channels, and B x is the brightness requirement of the xth region, N is the number of pixels in the region, Gray i is the gray value of the i-th pixel.

[0073] When using:

[0074] The control panel 21 formats and standardizes the information according to the brightness, contrast and other display parameters set by the user or the information obtained through analysis by the light sensor 17 to obtain basic parameters; the control panel 21 processes the obtained basic parameters using image processing technology to identify the high-brightness areas and the areas producing halo phenomena in the target image, and divides the areas with different brightness.

[0075] After completing the division of the target image into regions, the control panel 21 uses an image analysis algorithm to calculate the specific brightness value required for each divided region and generates a control instruction list, the specific content of which is the target brightness of each region and the corresponding status of the lamp beads 10.

[0076] Then, the control panel 21 obtains the actual brightness of the different divided areas and the brightness of the halo area through the light sensor 17 .

[0077] The control panel 21 uses the specific brightness value calculated by the image analysis algorithm and the actual brightness value fed back by the light sensor 17 to calculate the adjusted brightness value and position adjustment decision of each lamp bead 10 by using the linear interpolation and weighted average method. By adjusting the brightness value and position adjustment decision, the target state of each lamp bead 10 is obtained, and the target state is updated to the control instruction list for execution.

[0078] The control panel 21 transmits the control signal to the controller 14 and the switch element 15 through the driving circuit 13 , and the controller 14 and the switch element 15 control the DC motor 11 to complete the position movement and brightness adjustment of the lamp bead 10 .

[0079] For the identified highlight area, the control panel 21 sends a control signal to the corresponding lamp bead 10, increases its brightness and calculates the distance the lamp bead 10 should move toward the highlight area. Conversely, for the halo area, the control panel 21 sends a control signal to the corresponding lamp bead 10, reduces its brightness and calculates the distance the lamp bead 10 should move away from the halo area.

[0080] After executing the command, the control panel 21 continues to monitor the actual brightness value fed back from the light sensor 17, and determines whether the actual brightness value reaches the target brightness value or there is a halo area; if it is detected that there is a deviation between the actual brightness value and the target brightness value or there is a halo area, the control panel 21 recalculates the adjustment brightness value and position adjustment decision, and sends control information to the drive circuit 13 to adjust the brightness and position of the lamp bead 10. The control panel 21 continuously adjusts the brightness and position of the lamp bead 10 according to the feedback from the light sensor 17 until the actual brightness value of the lamp bead 10 is equal to the target brightness value and there is no halo area.

[0081] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A brightness control device based on a semi-transparent micro-motor system, characterized in that: include: A backlight layer (20); a control panel (21) is arranged at the bottom of the backlight layer (20); a light sensor (17) is arranged on the side of the backlight layer (20); a sliding track (18) is arranged above the backlight layer (20); a moving platform (12) is installed on the sliding track (18); a DC motor (11) is arranged below the moving platform (12); a DC power supply (16) is arranged on the DC motor (11); a driving circuit (13) is arranged above the moving platform (12); a controller (14) is arranged on the driving circuit (13); and a switching element (15) is also arranged on the driving circuit (13).

2. A brightness control device based on a semi-transparent micro-electromechanical system according to claim 1, characterized in that: The operation method includes the following steps: Step A: The control panel (21) processes the display information input by the user or the information analyzed by the optical sensor (17) to obtain basic parameters; Step B: Process the obtained basic parameters using image processing technology to identify high-brightness areas and areas where halo phenomena occur in the target image, and divide areas of different brightness; Step C: Use the image analysis algorithm to calculate the specific brightness value required for each divided area and generate a control instruction list; Step D: The light sensor (17) monitors the actual brightness of the different divided areas in real time, and feeds back to the control panel (21), providing the current actual brightness value of the lamp bead (10) and the brightness of the halo area; Step E: The control panel (21) calculates the specific brightness value obtained by the image analysis algorithm and the actual brightness value fed back by the light sensor (17), and uses the linear interpolation and weighted average method to calculate the adjusted brightness value and position adjustment decision of each lamp bead (10), wherein the adjusted brightness value is obtained by the following calculation: Adjust brightness value = target brightness value - actual brightness value; Step F: by adjusting the brightness value and the position adjustment decision, the target state of each lamp bead (10) is obtained, and the target state is updated into the control instruction list for execution; Step G: The control panel (21) transmits the control signal to the controller (14) and the switch element (15) through the drive circuit (13), and the controller (14) and the switch element (15) control the DC motor (11) to complete the position movement and brightness adjustment of the lamp bead (10).

3. A brightness control device based on a semi-transparent micro-electromechanical system according to claim 2, characterized in that: The operation method also includes the following steps: Step H: After executing the command, the control panel (21) continues to monitor the actual brightness value fed back from the light sensor (17), and determines whether the actual brightness value reaches the target brightness value or a halo area exists; if it is detected that there is a deviation between the actual brightness value and the target brightness value or a halo area exists, the control panel (21) recalculates the adjustment brightness value and position adjustment decision, and sends control information to the driving circuit (13) to adjust the brightness and position of the lamp bead (10); Step I: The control panel (21) continuously adjusts the brightness and position of the lamp bead (10) according to the feedback from the light sensor (17) until the actual brightness value of the lamp bead (10) is equal to the target brightness value and no halo area exists.

4. A brightness control device based on a semi-transparent micro-electromechanical system according to claim 2, characterized in that: In the step A, the display information input by the user or the information obtained through analysis by the optical sensor (17) is processed by formatting and standardizing.

5. The brightness control device based on the semi-transparent micro-electromechanical system according to claim 2, characterized in that: The image processing techniques in step B are edge detection algorithm, grayscale histogram algorithm, brightness balance algorithm, and region segmentation algorithm.

6. The brightness control device based on a semi-transparent micro-electromechanical system according to claim 2, characterized in that: The specific content of the control instruction list in step C is the target brightness of each area and the corresponding lamp bead status.

7. The brightness control device based on a semi-transparent micro-electromechanical system according to claim 2, characterized in that: The image analysis algorithm in step C is: Among them, Gray=a1·R+a2·G+a3·B, Where Gray is the gray value of a pixel, a1, a2, a3 are weights and a1+a2+a3=1, R, G, B are the pixel values ​​of the red, green, and blue channels, and B x is the brightness requirement of the xth region, N is the number of pixels in the region, Gray i is the gray value of the i-th pixel.

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