PIS distributed automatic energy-saving electronic screen

Abstract

The invention relates to a PIS distributed automatic energy-saving electronic screen, and provides a method for performing histogram equalization on reference values of original image (white, red, blue and green) color values on the basis of image pulses on the basis of power supplied to an LED module, setting the value of current (If) flowing in an LED, and adjusting the brightness of the LED module. And then comparing the difference between the image reference value of the gamma controller and the image correction value equalized by the histogram at a gain controller, considering the image quality, the brightness and the image size, and identifying the change of the loss value of the difference subtraction by using the power consumption difference of the display image, thereby automatically reducing the loss and realizing the energy-saving PIS distributed automatic energy-saving electronic screen.

Description

Technical Field

[0001] This invention relates to an energy-saving method for LED electronic screen modules, and more specifically, to a PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen. When driving the electronic screen, the power supplied to the LED module is controlled by the change in the difference between the reference value of the input image gamma controller image value, the correction value of the PIS controller value histogram equalization, and the loss value of the gain controller. This control of the LED module's drive current allows for PIS control to prevent unnecessary power loss and achieve energy saving, thus enabling control of the LED electronic screen's drive. Background Technology

[0002] LED (Light Emitting Diode) is a light-emitting semiconductor device that emits light. It comes in various colors such as red, green, blue, and yellow and is widely used in various electronic products and electronic display panels such as dashboards.

[0003] LED electronic screens consist of multiple LEDs arranged in a matrix, with these LEDs forming pixels for displaying images. These LED electronic screens are installed in various forms on the exterior or interior of buildings to convey advertisements or various messages.

[0004] Typically, electronic screen systems are known to display various text or images by arranging LEDs or small fluorescent tubes in a matrix.

[0005] The electronic screen system receives video signals from video media such as DVDs, VCRs, broadcasting equipment, and AV devices, converts them into appropriate signals, and then displays the images on the electronic screen.

[0006] In recent years, LED electronic screens are no longer simply used to display text or static images to convey information, but are widely used to play videos such as TV commercials. As LED electronic screens become larger, their power consumption is also increasing. In recent years, with the increasing requirements for energy-saving technologies, there is also a need for technologies to reduce the power consumption of LED electronic screens.

[0007] Therefore, in order to operate LED electronic screens with low power and minimize standby power consumption, a scheme is proposed to save power consumption by setting the driving time according to the brightness difference of LED colors, or by controlling the power supply to turn off the power supply by controlling the switch signal when running in standby mode.

[0008] That is, such as Figure 1As shown in the circuit diagram, the resistor R is usually fixed and connected in series with the LED. This is because the brightness depends on the supply of current (If). Therefore, generally, the LED is driven by a fixed value of resistor R, image brightness, and the existing Vf value of the LED chip. As a result, it cannot respond to changes in the operating current if value, so it inevitably consumes effective power. Power consumption occurs due to heat in the LED module and LED chip, which leads to the problem of shortening the life of the LED module.

[0009] Therefore, the applicant proposes an energy-saving scheme controlled by PIS. This scheme, when driving the display screen, no longer uses a simple resistor circuit to power the LED module, but instead controls the driving current of the LED module of the screen by controlling the input image value to prevent unnecessary power loss. Summary of the Invention

[0010] This invention is proposed to solve the above-mentioned problems. Its purpose is to provide a PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen, which can easily realize the driving control of high-definition images. The current supplied to the LED module is set after histogram equalization of the reference value of the initial image color value based on the image pulse. The image gain controller compares the difference between the image reference value of the gamma controller and the image correction value after histogram equalization. Taking into account image quality, brightness and image size, the power consumption difference of the displayed image is used to identify the change of the difference subtraction loss value, thereby automatically reducing its loss and realizing energy saving.

[0011] To achieve the aforementioned objective, a PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen according to an embodiment of the present invention includes: an image signal source for providing an image signal to be displayed on an LED electronic screen module; an MCU (Main Control Unit) that performs histogram equalization on the input image signal through a PIS energy-saving controller, sets the current (if) value flowing in the LED, and then compares the difference between the image reference value of the gamma controller and the image correction value after histogram equalization with the gain controller, considering changes in image quality, brightness, and image size, and automatically implements energy-saving actions by recognizing the change in the power consumption difference of the displayed image through the difference subtraction loss value, and transmits corresponding image information; an SCU (Sub Controller Unit) that, through the PIS energy-saving controller of the MCU, transmits the current value set by histogram equalization based on the value determined by comparing the image reference value of the gamma controller and the image correction value after histogram equalization with the value determined by the gain controller, and transmits the difference between the image before and after correction as a PIS data value signal to the LED module for display; and an LED electronic screen module employing a module array (Module In the array method, multiple LEDs arranged in a matrix form to form a display module with n×m pixels (R, G, B) are arranged to form a picture. For the image signal input through the image input device, the image information is received and displayed based on the difference subtraction loss value compared with the correction value of the PIS controller value histogram equalization and the reference value of the image value through the gamma controller and the gain controller.

[0012] Invention Effects According to an embodiment of the present invention, the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen controls the driving current of the LED module of the electronic screen by adjusting the power supplied to the LED module for driving the LED electronic screen based on the difference between the correction value of the PIS controller value histogram equalization and the difference loss value compared with the gain controller, based on the reference value of the gamma controller image value of the input image. This controls unnecessary power loss.

[0013] Furthermore, this invention sets the current (if) flowing through the LED after histogram equalization of the reference values ​​of the initial image values ​​(white, red, blue, green) based on the image pulses, and compares the difference between the image reference value of the gamma controller and the image correction value after histogram equalization in the image gain controller. Taking into account image quality, brightness, and image size, the power consumption difference of the displayed image is used to identify the change in the difference subtraction loss value, thereby automatically reducing its loss to achieve energy saving and minimizing the power loss caused by driving the LED electronic screen.

[0014] Furthermore, the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen according to an embodiment of the present invention sets the current supplied to the LED module with the input image value determined by the histogram gain controller as a reference value and performs equalization. The difference between the image before and after correction is used as the signal of the PIS data value and designated as the display current value (If) of the LED module. The difference between the image reference value of the gamma controller and the image correction value after histogram equalization is used as the power consumption difference of the displayed image to achieve energy saving. By controlling the driving current of the LED module, the power consumption limitation caused by driving the electronic screen can be overcome. Attached Figure Description

[0015] Figure 1 This is a circuit diagram of the dot register structure of an existing LED module.

[0016] Figure 2 This is a structural diagram of the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen according to the present invention.

[0017] Figure 3 This is a structural diagram of the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen MCU according to the present invention.

[0018] Figure 4 yes Figure 3 Internal block diagram of the PIS power automatic control drive of the MCU.

[0019] Figure 5 yes Figure 4 Detailed circuit diagram of the PIS control drive.

[0020] Figure 6 This is a structural diagram of the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen SCU according to the present invention.

[0021] Figure 7 It is shown Figure 6 A block diagram of the internal structure of the Module Driver Unit.

[0022] Figure 8 This is a state diagram illustrating the PIS drive histogram control action according to the present invention.

[0023] Figure 9 This is a circuit diagram of the dot register structure of the LED module according to the present invention.

[0024] In the picture: 100: Image signal source, 200: Main controller, 210: Main processor, 220: Frame memory, 230: PIS energy-saving controller, 231: PIS controller, 233: Histogram equalizer, 235: Gain controller, 240: Grayscale pixel controller, 250: Gamma controller, 260: Spatial corrector, 270: Automatic flicker detector, 300: Sub-controller, 340: PIS data controller, 400: LED electronic screen module. Detailed Implementation

[0025] The present invention provides an energy-saving LED electronic screen. In order to control the driving power of the LED electronic screen, the power supply of the LED module driven by a simple resistor circuit is usually controlled by the difference subtraction loss value of the comparison between the correction value of the PIS controller value histogram equalization and the reference value of the gamma controller image value of the input image and the gain controller. By controlling the PIS, unnecessary power loss is prevented, thereby achieving energy saving.

[0026] Figure 2 This is a detailed structural diagram of the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen according to the present invention, which generally includes: an image signal source 100, an MCU 200, an SCU 300, and an electronic screen module 400. The image signal source 100 provides image signals to the LED electronic screen module 400. The LED electronic screen module 400 is provided in the form of dots (R, G, B) pixels, receives the image signals, and drives the display dots (R, G, B) to display the image in a polymorphic form.

[0027] The image signal source 100 is a source for providing image signals to be displayed on the LED electronic screen module 400. It can be a device that reproduces image media provided by DVD, HDMI, DP or VCR, or reads image data stored in memory and transmits it to the computer of the LED electronic screen module 400, but is not limited to these.

[0028] The MCU (Main Control Unit) 200 performs histogram equalization on the input image through the PIS energy-saving controller 230, sets the current (if) value flowing in the LED, and then compares the difference between the image reference value of the gamma controller and the image correction value after histogram equalization with the gain controller. Taking into account changes in image quality, brightness, and image size, the power consumption difference of the displayed image is used to identify the change in the difference subtraction loss value, automatically realizes the energy-saving action, and displays the corresponding image information on the LED electronic screen module 400.

[0029] The SCU (Server Controller Unit) 300, through the PIS energy-saving controller 230 of the MCU 200, transmits the current value set by histogram equalization to the LED module 400 for display, based on the difference between the image reference value of the gamma controller compared by the gain controller and the image correction value after histogram equalization, and the difference between the image before and after correction as the PIS data value.

[0030] That is, the typical electronic screen image display control is a simple distribution and transmission function that transmits image data from MCU 200 to LED electronic screen module 400 to display the image by controlling the image data. However, the present invention uses the PIS energy-saving controller 230 of MCU 200 to perform histogram equalization on the reference values ​​of the input image values ​​(white, red, blue, green) color values, sets the current (if) value flowing in the LED, and then compares the difference between the image reference value of the gamma controller and the image correction value after histogram equalization on the image gain controller. Taking into account changes in image quality, brightness, and image size, the difference between the image before and after correction is transmitted to the LED module 400 as a signal of PIS data value for display.

[0031] The LED electronic screen module 400 adopts a module array method, in which multiple LEDs arranged in a matrix form to form a display unit with n×m pixels, thereby forming an image. For the image signal input through the image input device, the driving current of the LED module of the electronic screen is controlled and displayed based on the change of the correction value of the PIS controller value histogram equalization and the difference loss value compared with the gain controller, according to the reference value of the image value of the gamma controller.

[0032] In addition, in the LED electronic screen module 400, the unit display modules composed of multiple LEDs arranged in a matrix form to form a picture, considering the pixel or brightness value of the electronic screen as the image signal input through the image signal source, and by combining the image data stream with the brightness correction data in real time, the image data generated after correcting the brightness of the input image data is displayed.

[0033] Figure 3 This is a structural diagram of the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen MCU according to the present invention. Figure 4 Show Figure 3 Internal block diagram of the PIS power automatic control drive for the MCU. (See attached reference.) Figures 2 to 4This invention describes the detailed structure and operation of the PIS distributed automatic energy-saving electronic screen MCU. The MCU 200 of this invention is roughly divided into a main processor 210, a frame memory 220, a PIS energy-saving controller 230, a gamma controller 250, a space correction device 260, and an automatic flicker detector 270. The MCU (Main Control Unit) 200 performs histogram equalization on the input image data through the PIS energy-saving controller 230, then sets the current (If) value flowing through the LED module, and compares the difference between the image reference value of the gamma controller 250 and the correction value of the histogram equalized image in the gain controller 235. Taking into account changes in image quality, brightness, and image size, the power consumption difference of the displayed image is used to judge and identify the difference subtraction loss value, so that energy-saving actions can be automatically executed on the display of the operating electronic screen.

[0034] More specifically, the main processor 210 receives image data input from the image signal source 100, generates driving current to drive each light source of the LED electronic screen module 400, and when the image data of the image signal source 100 is regenerated by the image switcher, the frame memory 220 stores the corresponding image data and reads the stored image data for transmission.

[0035] On the other hand, the PIS energy-saving controller 230 is composed of a PIS controller 231, a histogram equalizer 233, and a gain controller 235. The histogram equalizer 233 synchronizes the image data stored in the frame memory 220 in frame units in the gamma controller 250 and generates the transmitted image signal. It uses a function to represent the ratio of the number of pixels, equalizes the distribution of brightness and darkness values, divides and smooths the brightness values ​​concentrated in one place, and sets the image reference value of the gamma value.

[0036] The gain controller 235 performs histogram equalization on the image data stored in the frame memory 220 and input, and sets the current (If) value flowing through the LED module. Then, it compares the difference between the image reference value of the gamma controller 250 and the correction value of the histogram equalized image, and uses the power consumption difference of the displayed image to judge and identify the difference subtraction loss value, taking into account changes in image quality, brightness, image size and power consumption difference of the displayed image.

[0037] That is, the gain controller 235 adjusts the refresh rate to high for low gray levels. When there are higher gray levels, since gray levels do not affect the refresh rate, the high gray levels are further divided into intervals, and the refresh rate is increased by several times accordingly. However, since the frame rate of the output image is ineffectively increased, the gray level of the output image can be reduced and the image can be processed smoothly to obtain an image quality improvement effect.

[0038] The PIS controller 231 performs histogram equalization on the input image data through the histogram equalizer 233, sets the current (If) value flowing through the LED module, and compares the difference between the image reference value of the gamma controller 250 and the correction value of the histogram equalized image in the gain controller 235. Taking into account image quality, brightness, and image size, the power consumption difference of the displayed image is used to determine the change in the difference subtraction loss value, and the current value used for display on the electronic screen is specified and transmitted to control the LED module 400 to automatically achieve energy-saving drive.

[0039] The grayscale pixel controller 240 adjusts the refresh rate period according to the grayscale of the image signal input to the image signal source 100 in order to improve the refresh rate of high grayscale and low grayscale, capture the balance of uniform distribution in the time domain, adjust the frame frequency of the output image, and reduce flicker caused by pigment deposition.

[0040] Additionally, the grayscale pixel controller 240 generates a drive current based on the image signal input from the image signal source 100 to drive each light source of the LED electronic screen module 400, stores the input image in frame units in the frame memory 220, and adjusts the low grayscale refresh rate according to the type of input image information in the gain controller 235, increases the refresh rate of high grayscale and low grayscale, captures the balance of uniform distribution in the time domain, adjusts the frame frequency of the output image, and reduces flicker caused by pigment deposition.

[0041] The grayscale pixel controller 240 performs grayscale processing on the image data values ​​whose gamma values ​​are determined by the gamma controller 250 using the histogram, and displays the grayscale processed image after scanning and switching processing. Thus, the image gamma correction and image grayscale histogram equalization operations are performed.

[0042] Additionally, the gamma controller 250 controls the white balance of the image of the dot output values ​​and grayscale pixel values ​​of the display LED module, brightness correction to improve the uniformity of color and brightness, and converts the refresh rate of the grayscale adjustment according to the grayscale adjustment adjusted by the gain controller 235 into a target grayscale bit source image signal. It also generates a grayscale clock suitable for the grayscale bit conversion logic, a data clock for transmission, and a control and synchronization signal for the horizontal synchronization signal to control the brightness correction in order to improve the white balance, color, and brightness uniformity of the image of the dot output values ​​and grayscale pixel values ​​of the display LED module.

[0043] The Space Corrector 260 generates a grayscale clock suitable for grayscale bit conversion logic, a data clock for transmission, control of the horizontal synchronization signal, and a synchronization signal.

[0044] Based on the cycle input from the Auto Flicker Detection 270, the flicker frequency detected based on the occurrence of flicker and the adjusted integration time are set and transmitted to the LED electronic screen module 400 to display the corresponding image signal, showing an image of the reduction of flicker in pigmentation phenomenon over time and through a cycle.

[0045] Figure 6 This is a structural diagram of the SCU of the PIS (Pixel Integrate Scanning) distributed automatic energy-saving electronic screen according to the present invention. Figure 7 It is shown Figure 6 A block diagram of the internal structure of the Module Driver Unit. Figure 8 This is a state diagram illustrating the PIS drive histogram control action according to the present invention. The SCU 300 is mainly divided into a PIS video controller 310, a PIS video buffer controller 320, and a PIS data controller 340. The PIS video controller 310, by driving the PIS energy-saving controller 230 of the MCU (Main Control Unit) 200, performs histogram equalization on the input image data, sets the current (If) value flowing through the LED module, and compares the difference between the image reference value set by the gamma controller 250 and the correction value of the histogram equalized image in the gain controller 235. It considers changes in image quality, brightness, and image size, and uses the power consumption difference of the displayed image to determine the change in the difference subtraction loss value. This includes the grayscale clock generated by the space correction 260 suitable for grayscale bit conversion logic, the data clock for transmission, the control of the horizontal synchronization signal, and the synchronization signal transmission. It stores these in the PIS video buffer 320 and displays them in the LED module 400 as PIS data value signals through the PIS data controller 340.

[0046] That is, the current supplied to the LED module 400 depends on the pulse wave of the input image. When the image pulse wave is "1", the current (If) supplied to the LED module 400 is powered on. In the PIS data controller 340, the reference value is balanced according to the value determined by the histogram gain controller under the control of the PIS controller 231. Therefore, by setting the display current value of the LED module 400 as the signal of the difference between the image before and after correction as the PIS data value, the difference between the image reference value of the gamma controller and the image correction value after histogram equalization is the power consumption difference of the displayed image, thus achieving energy saving.

[0047] like Figure 9As shown, in the structure of the dot register of the LED module applied in this invention, the resistor R is fixed and connected in series with the LED. Since the value of resistor R is fixed, it is driven by the fixed value of the image brightness and the existing Vf value of the LED chip. Therefore, it cannot respond to changes in the operating current (if) value. Due to the consumption of effective power, the heat generated on the LED module and the LED chip leads to a shortened lifespan of the LED module. To solve this problem, a PIS data controller is added to the LED terminal. Based on the simple image pulse, the reference value of the color value of the initial image value (white, red, blue, green) is set according to the PIS data value after histogram equalization to set the current (If) value flowing through the LED. Thus, the difference between the image reference value of the gamma controller 250 and the image correction value after histogram equalization produces a difference in the power consumption of the displayed image, thereby achieving energy saving. As a result, the lifespan of the LED module can be extended and the current saving problem can be solved.

Claims

1. A PIS distributed automatic energy-saving electronic screen, characterized in that, include: An image signal source (100) is used to provide an image signal that will be displayed on the LED electronic screen module (400); The MCU (200) performs histogram equalization on the input image signal through the PIS energy-saving controller (230), sets the current (if) value flowing in the LED, and then compares the difference between the image reference value of the gamma controller and the image correction value after histogram equalization with the gain controller. Taking into account the changes in image quality, brightness, and image size, the MCU automatically realizes energy-saving action by identifying the change in the difference subtraction loss value by the power consumption difference of the displayed image and transmits the corresponding image information. The SCU (300) transmits the current value set by histogram equalization to the LED module (400) and displays it by means of the PIS energy-saving controller (230) of the MCU (200), based on the difference between the image reference value of the gamma controller compared by the gain controller and the image correction value after histogram equalization. The LED electronic screen module (400) adopts a module array method. The unit display modules composed of multiple LEDs arranged in a matrix form according to the n×m pixels of the point (R, G, B) to form a picture. For the image signal input through the image input device, the image information is received and displayed according to the difference subtraction loss value compared with the reference value of the image value of the gamma controller by the correction value of the PIS controller value histogram equalization and the gain controller.

2. The distributed automatic energy-saving electronic screen according to claim 1, characterized in that, The MCU (200) controls the drive current of the LED module of the electronic screen based on the change of the correction value of the PIS controller value histogram equalization and the subtraction loss value compared with the gain controller, according to the reference value of the gamma controller image value of the input image and the reference value of the PIS controller value histogram equalization. It also controls the drive of the LED electronic screen to achieve energy saving by controlling the PIS controller.

3. The distributed automatic energy-saving electronic screen according to claim 1, characterized in that, The MCU (200) also includes: The main processor (210) receives image data input from the image signal source (100) and generates driving current to drive each light source of the LED electronic screen module (400); The frame memory (220) stores the corresponding image data when the image data of the image signal source (100) is reproduced by the image switcher, and reads the stored image data for transmission. The PIS energy-saving controller (230) performs histogram equalization on the image data input through the frame memory, sets the current (If) value flowing through the LED module, and compares the difference between the image reference value of the gamma controller (250) and the correction value of the histogram equalized image in the gain controller (235). It considers the changes in image quality, brightness, and image size and uses the power consumption difference of the displayed image to judge and identify the changes in the difference subtraction loss value, so that energy-saving actions can be automatically performed on the display of the operating electronic screen. The grayscale pixel controller (240) adjusts the refresh rate period according to the grayscale of the image signal input to the image signal source (100) to improve the refresh rate of high grayscale and low grayscale, capture the balance of uniform distribution in the time domain, adjust the frame frequency of the output image, and control the flicker reduction of pigment deposition phenomenon. The gamma controller (250) and grayscale pixel controller (240) use the histogram to determine the gamma value of the image data value for grayscale processing, and then display the grayscale processed image after scanning and switching processing. Thus, the gamma correction of the image and the histogram equalization of the image grayscale are performed. An automatic flicker detector (270) generates flicker according to the input cycle, sets the flicker frequency and the modulated integration time based on the flicker detection, and transmits them to an LED electronic screen module (400) to display the corresponding image signal, displaying an image showing the reduction of flicker in pigmentation phenomena over time and through a cycle.

4. The distributed automatic energy-saving electronic screen according to claim 3, characterized in that, The PIS energy-saving controller (230) also includes: The histogram equalizer (233) synchronizes the image data stored in the frame memory (220) in frame units in the gamma controller (250) and generates the transmitted image signal. It uses a function to represent the ratio of the number of pixels, equalizes the distribution of brightness values, divides and smooths the brightness values ​​concentrated in one place, and sets the image reference value of the gamma value. The gain controller (235) performs histogram equalization on the input image data stored in the frame memory (220) and sets the current (If) value flowing through the LED module. Then, it compares the difference between the image reference value of the gamma controller (250) and the correction value of the histogram equalized image, taking into account changes in image quality, brightness, image size, and power consumption difference of the displayed image to determine and identify changes in the difference subtraction loss value; and The PIS controller (231) performs histogram equalization on the input image data through the histogram equalizer (233), sets the current (If) value flowing through the LED module, and compares the difference between the image reference value of the gamma controller (250) and the correction value of the histogram equalized image in the gain controller (235). Taking into account image quality, brightness, and image size, when judging the change of the difference in power consumption of the displayed image, it specifies and transmits the current value for display on the electronic screen, and controls the LED module (400) to automatically realize energy-saving drive.

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