1344299 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種具嵌入式微處理器之LED顯示 系統，且特別是有關於一種將電腦中儲存之靜態或動態影 像轉換至LED顯示器之具嵌入式微處理器之LED顯示系 .统。 ' 【先前技術】1344299 IX. Description of the Invention: [Technical Field] The present invention relates to an LED display system with an embedded microprocessor, and more particularly to a device for converting static or dynamic images stored in a computer to an LED display. LED display system of embedded microprocessor. 'Prior art
目前各種次世代光源的發展狀況，以發光二極體 (Light Emitting Diode; LED)的進程最為大眾所看好。lED 的各式應用更是目前最熱門的產業之一，例如輔助照明燈 具，液晶顯示器的背光源和LED顯示器等相關領域◊其中 由LED所排列組合而成的顯示器，應用極為廣泛小至已 普遍裝设於各大城市的交通號誌'’大至上百对的戶外電視 牆’已有許多既經濟且高附加價值的用途展現於大眾生活 之中。 工研院能資所協助經濟部能源局所執行的「LED交通 號誌燈節能示範計畫」中，其報告中明確指出：在全國六 大都市更換LED交通號言志新系統達2〇 · 8萬盒後，除因號 誌辨識度提高而改善交通安全外，總計一年約可劣下i億 度之電力。若以全國6<6萬盞號誌系統改善完竣估計，每 年至少可省下3.3億度之交通號諸用電，如此足見led顯 示器之高效能與其對節能之巨大貢獻。 但習知之LED顯示器常見顯示之色彩失真，無法確實 6 1344299 傳遞訊號源所攜帶之色彩訊號，除了 LED本身的亮度與色 彩均勻度等特性無法滿足之外，更重要的是由影像訊號源 轉換為LED可接受之脈寬調變（Pulse Width Modulation ; PWM)訊號之過程中，因希望增加影像訊號之每秒顯示更 新速率（frame per second ; fps)，故將影像訊號源之編碼與 解碼内容予以簡化，進而導致顯示結果失真。 本發明可藉由採用國際標準之編碼與解碼系統，配合 LED色彩校正表與三原色（Red/Green/Blue ; R/G/B)之LED 顯示器，改善上述習知技術之問題。 【發明内容】 為解決上述和其他的問題，並且達到本發明所主張的 技術優點，本發明提供一種具嵌入式微處理器之LED顯示 系統。 因此本發明的目的就是在提供一種將影像訊號源擷 取並轉換至LED顯示器之LED顯示系統，用以將電腦中 儲存之靜態或動態影像轉換至LED顯示器播放。 根據本發明之上述目的，提出一種具嵌入式微處理器 之LED顯示系統。依照本發明一較佳實施例，此LED顯 示系統包含影像訊號源，影像擷取控制器，數位多工編碼 控制器，數位多工解碼控制器與LED顯示器。 其中的影像訊號源為個人電腦，此影像訊號源可提供 靜態或動態之影像訊號。影像擷取控制器係用以擷取影像 訊號源之影像，並透過嵌入式微處理器與個人電腦端進行 7 1344299 控制訊號與影像資料之傳送與接收。數位多工編碼控制器 係用以接收由影像擷取控制器傳送的資料，進行編碼與偵 錯之程序後，將資料儲存到記憶體中。數位多工解碼控制 器係用以接收由數位多工編碼控制器傳送的資料，將資料 中包含的色彩訊號解調出來，並經由脈寬調變（PWM)轉換 電路轉換成脈寬調變訊號格式，進而驅動LED顯示器。 LED顯示器係使用三原色之LED，為達到24位元（bit)的 全彩（True Color)顯示效果，每一原色LED之解析度採用8 位元。 此系統可將儲存於電腦中的靜態或動態影像，轉換為 控制LED之脈寬調變訊號，進而達成以三原色LED顯示 全彩影像之效果。 【實施方式】 參照第1圖，其繪示依照本發明一較佳實施例的一種 具嵌入式微處理器之LED顯示系統示意圖。LED顯示系 統100包含影像訊號源110，影像擷取控制器120，數位多 工編碼控制器130，數位多工解碼控制器140與LED顯示 器 150。 影像訊號源110為個人電腦，其經由視窗介面抓取個 人電腦中的影像，並以通用非同步接收發送器（Universal Asynchronous Receiver/Transmitter; UART)介面傳輸至影 像擷取控制器120。 影像擷取控制器120則接收個人電腦端的影像資料’ 8 1344299 並轉換為串列的格式輸出，因為影像擷取控制器120内部 包含嵌入式微處理器，除了和個人電腦作數據交換外，亦 可搭配數位視覺介面（Digital Visual Interface ; DVI)和嵌_入 式微處理器連接，以達到更佳的傳輸品質。另外，亦能藉 由嵌入式微處理器對影像訊號作額外的訊號處理。 數位多工編碼控制器130主要功能為接收影像擷取控 制器120所傳送的影像資料，並將資料格式編碼為 DMX512的格式。DMX512數據傳輸協定為美國劇院技術 協會（The United States Institute for Theatre Technology ; USITT)於1990年發佈的一種燈光控制器與燈具設備進行 數據傳輸的標準。 數位多工解碼控制器140主要功能為接收數位多工編 碼控制器130所產生的訊號（包含影像資料），並將資料解 碼轉換為脈寬調變訊號以驅動LED顯示器150。數位多工 解碼控制器140内部包含LED曲線修正表，經由比對此表 可修正脈寬調變訊號使LED顯示燈更接近全彩（True Color) 顯示的表現。 LED顯示器150，主要功能係將脈寬調變訊號經過開 集極（open collector)電路把電壓轉成電流以驅動LED顯示 器150中之LED，進而達成顯示圖像的目的。 參照第2圖，其繪示依照本發明一較佳實施例的一種 視窗介面示意圖。視窗介面111包含視窗介面傳送鈕112, 傳送影像顯示處113，傳送影像資料顯示處114與傳送影 像資料之狀態訊息顯示處115。 9 視窗介面m的操作步驟為按下視窗介面傳送鈕 "2,此時擷取影像係由滑鼠游標點選影像訊號源”〇中的 影像，點《彡像之後，影像㈣在料料顯*處⑴， 出現於傳送影像資料顯示處114之數據是依照影像操取控 制器no所儲存之資料位址。傳送影像資料之狀態訊息顯 示處115則顯示傳送資料成功與否。 ,參照第3圖，其緣示依照本發明一較佳實施例的—種 影像掘取控制器示意圖。影像操取控制器⑶包含微處理 器模組12卜雙時脈式暫存器⑵，位址產生器123,資料 碼器…益125,時脈產生器126與輸出編 當影像摘取控制器12〇和影像訊號源u〇連接後，微 處理器模組121會接㈣像訊絲UG傳送過來的影像資 料，並把影像資料傳送至雙時脈式暫存器， 同時位址產生器】23會一直對雙時脈式暫存器122 作要求給資料的動作，只要雙時脈式暫存器122内部有資 料，便會輸出資料至位址產生器123 ^ 」而因為微處理器模组】2 i和影像操取控制器1的 ‘脈不同（微處理器模組121是u 〇592 MHz、影像操取控 器120為66 MHz)，因此在微處理器模組121到雙時脈 ’暫存器122之間需設計一個波型整形電路，其主要功能 =把微處理ϋ模組⑵送至雙時脈式暫存器122的訊號寬 又調整成可被雙時脈式暫存器⑵採用之系統時脈寬度， 以防止雙時脈式暫存器122的資料存放錯誤。 1344299At present, the development of various next-generation light sources is most favored by the public in the process of Light Emitting Diode (LED). The various applications of lED are one of the most popular industries at present, such as auxiliary lighting fixtures, backlights for liquid crystal displays and LED displays, etc. Among them, LEDs are arranged in a combination of LEDs, which are widely used and widely used. The traffic signs installed in major cities ''too hundreds of pairs of outdoor video walls' have shown many economical and high value-added uses in the public life. In the "LED Traffic Lights Energy Savings Demonstration Project" implemented by the Energy Research Institute of the Ministry of Economic Affairs, the Institute of Industry and Technology has clearly stated that it has replaced the LED traffic number in the six major cities of the country. After 10,000 boxes, in addition to improving traffic safety due to the increased identification of the number, a total of about one hundred million degrees of electricity can be inferior for one year. If the national 6 < 60,000 盏 志 system is improved, at least 330 million kWh of traffic number can be saved every year. This shows the high performance of the led display and its contribution to energy saving. However, the color display of the commonly used LED display is not correct. It is impossible to confirm the color signal carried by the signal source. In addition to the brightness and color uniformity of the LED itself, it is more important to convert the image signal source into In the process of the Pulse Width Modulation (PWM) signal that the LED can accept, since it is desired to increase the display update rate (frame per second; fps) of the image signal, the encoding and decoding content of the image signal source is given. Simplified, which in turn causes distortion of display results. The present invention can improve the above-mentioned problems of the prior art by using an international standard encoding and decoding system, an LED color correction table, and an LED display of three primary colors (Red/Green/Blue; R/G/B). SUMMARY OF THE INVENTION To address the above and other problems and to attain the technical advantages of the present invention, the present invention provides an LED display system with an embedded microprocessor. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an LED display system for extracting and converting an image signal source to an LED display for converting static or dynamic images stored in the computer to the LED display for playback. In accordance with the above objects of the present invention, an LED display system having an embedded microprocessor is provided. According to a preferred embodiment of the present invention, the LED display system includes an image signal source, an image capture controller, a digital multiplex encoder controller, a digital multiplex decoding controller, and an LED display. The image signal source is a personal computer, and the image signal source can provide static or dynamic image signals. The image capture controller is used to capture images of the image source and transmit and receive 7 1344299 control signals and image data through the embedded microprocessor and the personal computer. The digital multiplexed code controller is used to receive the data transmitted by the image capture controller, and to store and debug the data, and then store the data in the memory. The digital multiplex decoding controller is configured to receive data transmitted by the digital multiplexed code controller, demodulate the color signal contained in the data, and convert the signal into a pulse width modulation signal via a pulse width modulation (PWM) conversion circuit. The format, which in turn drives the LED display. The LED display uses three primary colors of LEDs to achieve a 24-bit True Color display. The resolution of each primary color LED is 8-bit. This system converts the static or dynamic image stored in the computer into a pulse width modulation signal that controls the LED, thereby achieving the effect of displaying the full color image with the three primary color LEDs. Embodiments Referring to Figure 1, there is shown a schematic diagram of an LED display system with an embedded microprocessor in accordance with a preferred embodiment of the present invention. The LED display system 100 includes an image signal source 110, an image capture controller 120, a digital multiplex encoder controller 130, a digital multiplex decoding controller 140 and an LED display 150. The image source 110 is a personal computer that captures images from a personal computer via a window interface and transmits it to the image capture controller 120 via a Universal Asynchronous Receiver/Transmitter (UART) interface. The image capturing controller 120 receives the image data of the personal computer side 8 1344299 and converts it into a serial format output, because the image capturing controller 120 internally includes an embedded microprocessor, in addition to data exchange with a personal computer. It is connected with a digital visual interface (DVI) and an embedded microprocessor for better transmission quality. In addition, additional signal processing can be performed on the image signal by the embedded microprocessor. The digital multiplex encoder controller 130 is mainly configured to receive image data transmitted by the image capture controller 120 and encode the data format into a DMX512 format. The DMX512 Data Transfer Protocol is a standard for data transmission between lighting controllers and lighting fixtures issued by the United States Institute for Theatre Technology (USITT) in 1990. The digital multiplex decoding controller 140 is mainly configured to receive signals (including image data) generated by the digital multiplex controller 130 and convert the data into pulse width modulation signals to drive the LED display 150. The digital multiplex decoding controller 140 internally includes an LED curve correction table that allows the LED display to be closer to the performance of the True Color display by modifying the pulse width modulation signal than this table. The main function of the LED display 150 is to convert the pulse width modulation signal into an electric current through an open collector circuit to drive the LED in the LED display 150 to achieve the purpose of displaying an image. Referring to Figure 2, there is shown a schematic diagram of a window interface in accordance with a preferred embodiment of the present invention. The window interface 111 includes a window interface transfer button 112, a transfer image display portion 113, and a transfer image data display portion 114 and a status message display portion 115 for transferring image data. 9 The operation procedure of the window interface m is to press the window interface transfer button "2, at this time, the image is selected by the mouse cursor to select the image source in the image source, and after the image is clicked, the image (4) is in the material. The data appearing at the display image data display location 114 is the data address stored in accordance with the image manipulation controller no. The status information display location 115 of the transmission image data indicates whether the transmission data is successful or not. 3 is a schematic diagram of an image capturing controller according to a preferred embodiment of the present invention. The image manipulation controller (3) includes a microprocessor module 12 and a dual clock register (2), and the address is generated. The device 123, the data generator 126, the clock generator 126 and the output code are connected to the image capture controller 12 and the image signal source u〇, the microprocessor module 121 is connected (4) the image signal UG is transmitted. The image data is transmitted to the dual-clock register, and the address generator 23 always requests the dual-clock register 122 to request data, as long as the dual-clock temporary storage There is data inside the device 122, and the data will be output to The address generator 123 ^ ′′ and because the microprocessor module 2 i and the image manipulation controller 1 are different (the microprocessor module 121 is u 〇 592 MHz, and the image manipulation controller 120 is 66 MHz) Therefore, a waveform shaping circuit needs to be designed between the microprocessor module 121 and the dual clock 'storage unit 122, and its main function is to send the microprocessor module (2) to the dual clock register 122. The signal width is adjusted to the system clock width that can be used by the dual clock register (2) to prevent data storage errors of the dual clock register 122. 1344299
而位址產生器123會將資料存在資料記憶體124，其 中資料記憶體124内部劃分為兩個區塊，目的是為了未來 作動態顯示時不致導致影像延遲。資料記憶體丨24的動作 原理為’當位址產生器123儲存資料於記憶體區塊a時， 資料控制器125是在對記憶體區塊B作讀取動作，也就是 說輸出的資料是記憶體區塊B的資料；而當位址產生器 123儲存資料於記憶體區塊B時，輸出的資料就變為記憶 體區塊A的資料，藉以達到動態影像顯示的目的。 而資料控制器125的功能為控制資料傳輸和時脈產生 器12 6所產生的時脈。而輸出編碼器12 7的功能為接收資 料控制器125所讀取的影像資料，並把資料轉換成串列格 式傳送。傳送㈣格式的資料之前，在資料的起始處與終 止處均加上7F’以代表此串資料的開頭與結尾；而每兩筆 8位元的資料之間均加± 7E，代表區隔兩筆資料間的連 接。資料輸出的頻率是66 MHz。The address generator 123 stores the data in the data memory 124, wherein the data memory 124 is internally divided into two blocks for the purpose of not causing image delay for dynamic display in the future. The operation principle of the data memory 丨24 is 'when the address generator 123 stores data in the memory block a, the data controller 125 performs a reading operation on the memory block B, that is, the output data is The data of the memory block B; when the address generator 123 stores the data in the memory block B, the output data becomes the data of the memory block A, thereby achieving the purpose of dynamic image display. The function of the data controller 125 is to control the clock generated by the data transmission and clock generators 12. The function of the output encoder 12 7 is to receive the image data read by the data controller 125 and convert the data into a serial format transmission. Before transmitting the data in (4) format, add 7F' at the beginning and end of the data to represent the beginning and end of the data; and add ± 7E between each two 8-bit data to represent the segmentation. The connection between the two materials. The data output frequency is 66 MHz.
.照第4圖，其繪示依照本發明一較佳實施例的一種 數位多工編碼控制器示意圖。數位多工編碼控制器⑽包 含接收模組m，接收暫存器132，位址產生器133，資料 記憶體134，資料控制器135，輸出暫存器致能電路136 與DMX訊號編碼器137。 測到7F訊號，即表示開始接收 值4，:筆資料是ώ 7E訊號表_隔，接收到的資料會 先傳到接㈣存H 132做第—步的暫存，而同時位址產生 器⑶會-直對接收暫存器132作要求給資料的動作，只 11 1344299 要接收暫存器132有資料時就會傳送到位址產生器133, 進而儲存至資料記憶體134中，而位址產生器133的功能 就是判斷是否要存取資料記憶體134。而輸出資料就是由 資料控制器135對位址產生器133作要求，而輸出資料時 由輸出暫存器致能電路136決定哪一個輸出暫存器是啟動 的狀態，再把資料傳到DMX訊號編碼器137編碼成 DMX512的訊號格式，而DMX512之訊號格式請參照第5 圖。 參照第6圖，其繪示依照本發明一較佳實施例的一種 數位多工解碼控制器示意圖。數位多工解碼控制器140包 含DMX訊號解碼器141，LED曲線修正表142，資料暫存 器143與PWM轉換電路144。 DMX訊號解碼器141接收數位多工編碼控制器傳送 的資料後，再將影像資料取樣出來，經由三原色之LED曲 線修正表142做修正，以期LED顯示器能顯示更接近全彩 的顏色。在輸出部分會先由資料暫存器143先暫存DMX 訊號解碼器141傳過來的資料，再傳送到PWM轉換電路 144，把影像資料轉成PWM之訊號格式。 LED顯示器150可由單一顏色之LED或三原色 (Red/Green/Blue ; R/G/B)之LED排列組合而成。每個三原 色LED中至少包含了 一個紅光LED，一個綠光LED與一 個藍光LED。 PWM之訊號格式的資料輸入LED顯示器150之前會 先將PWM訊號轉換成電流以驅動組成LED顯示器1 50的 12 1344299 所有LED，即能讓LED顯示器150顯示靜態或動態之影 像。 參照第7圖，其繪示依照本發明一較佳實施例的一種 LED顯示系統之示意圖。LED顯示系統200包含視窗操作 介面210,影像擷取模組220, DMX編解碼模組230與LED 顯示器240。 當視窗操作介面210擷取輸出圖片後，連接影像擷取 模組220把資料透過RS-232介面傳送到影像擷取模組 220，再將資料經由DMX編解碼模組230處理後傳送到 LED顯示器240，進而把影像顯示於LED顯示器240，即 完成整個操作流程。 由上述本發明較佳實施例可知，應用本發明具有下列 優點： 1. 可將個人電腦中之靜態或動態影像以24位元之全 彩（True Color)形式顯示於LED顯示系統上，大幅降低影 像之失真程度。 2. 因本發明之編碼與解碼系統所採用之DMX5 12訊號 格式為國際標準，故各式燈光產業或顯示器產業均可採用 本發明之系統架構，產業利用性極佳。 雖然本發明已以一較佳實施例揭露如上，然其並非用 以限定本發明，任何熟習此技藝者’在不脫離本發明之精 神和範圍内，當可作各種之更動與潤飾，因此本發明之保 護範圍當視後附之申請專利範圍所界定者為準。 13 1344299 【圖式簡單說明】 為讓本發明之上述和其他目#、特徵、優，點與實施例 能更明顯易懂，所附圖式之詳細說明如下： 第1圖係繪示依照本發明一較佳實施例的一種具嵌入 式微處理器之LED顯示系統示意圖。 第2圖係繪不依照本發明一較佳實施例的一種視窗介 面示意圖。 第3圖係繪不依照本發明一較佳實施例的一種影像擷 取控制器示意圖。 第4圖係繪示依照本發明一較佳實施例的一種數位多 工編碼控制器示意圖。 第5圖係繪示依照本發明一較佳實施例的一種 DMX512之訊號格式示意圖。 第6圖係繪示依照本發明一較佳實施例的一種數位多 工解碼控制器示意圖。 第7圖係續·示依照本發明一較佳實施例的一種lED顯 示系統之示意圖。 【主要元件符號說明】 100 : LED顯示系統 111 .視窗介面 113 :傳送影像顯示處 115 :傳送影像資料之狀態 息顯示處 11 〇 :影像訊號源 112·視窗介面傳送紐 114 :傳送影像資料顯示處 訊120 :影像擷取控制器 14 1344299 m:微處理器模組 123 :位址產生器 125 :資料控制器 127 :輸出編碼器 13 1 :接收模組 133 :位址產生器 135 :資料控制器 137 : DMX訊號編碼器 141 . DMX訊號解碼器 143 :資料暫存器 150 : LED顯示器 210 :視窗操作介面 230 . DMX編解碼模組 122 :雙時脈式暫存器 124 .資料記憶體 126 .時脈產生器 13〇數位多工編碼控制器 132 .接收暫存器 134 :資料記憶體 136 :輸出暫存器致能電路 140 :數位多工解碼控制器 142 : LED曲線修正表 144 : PWM轉換電路 200 : LED顯示系統 220 :影像擷取模組 240 : LED顯示器 15Figure 4 is a schematic diagram of a digital multiplexed code controller in accordance with a preferred embodiment of the present invention. The digital multiplex encoder controller (10) includes a receiving module m, a receiving register 132, an address generator 133, a data memory 134, a data controller 135, an output register enabling circuit 136 and a DMX signal encoder 137. When the 7F signal is detected, it means to start receiving the value 4, the data of the pen is ώ 7E signal table _ interval, the received data will be transmitted to the first (four) memory H 132 to do the temporary storage of the first step, while the address generator (3) The action of requesting data to the receiving buffer 132 is only 11 1344299. When the receiving buffer 132 has data, it is transmitted to the address generator 133, and then stored in the data memory 134, and the address is stored. The function of the generator 133 is to determine whether or not to access the data memory 134. The output data is requested by the data controller 135 to the address generator 133, and when the data is output, the output buffer enable circuit 136 determines which output buffer is activated, and then transfers the data to the DMX signal. The encoder 137 is encoded into the signal format of the DMX512, and the signal format of the DMX512 is shown in FIG. Referring to Figure 6, a schematic diagram of a digital multiplex decoding controller in accordance with a preferred embodiment of the present invention is shown. The digital multiplex decoding controller 140 includes a DMX signal decoder 141, an LED curve correction table 142, a data buffer 143 and a PWM conversion circuit 144. After receiving the data transmitted by the digital multiplex encoder controller, the DMX signal decoder 141 samples the image data and corrects it through the LED curve correction table 142 of the three primary colors, so that the LED display can display a color closer to full color. In the output part, the data transmitted from the DMX signal decoder 141 is temporarily stored in the data register 143, and then transmitted to the PWM conversion circuit 144 to convert the image data into a PWM signal format. The LED display 150 can be composed of a single color LED or a combination of LEDs of three primary colors (Red/Green/Blue; R/G/B). Each of the three primary color LEDs includes at least one red LED, one green LED and one blue LED. The signal format of the PWM signal is input into the LED display 150 before the PWM signal is converted into a current to drive all the LEDs of the 12 1344299 which constitute the LED display 150, so that the LED display 150 can display a static or dynamic image. Referring to Figure 7, a schematic diagram of an LED display system in accordance with a preferred embodiment of the present invention is shown. The LED display system 200 includes a window operation interface 210, an image capture module 220, a DMX codec module 230 and an LED display 240. After the window operation interface 210 captures the output image, the connection image capturing module 220 transmits the data to the image capturing module 220 through the RS-232 interface, and then processes the data to the LED display through the DMX codec module 230. 240, and then displaying the image on the LED display 240, completes the entire operation process. It can be seen from the above preferred embodiments of the present invention that the application of the present invention has the following advantages: 1. The static or dynamic image in the personal computer can be displayed on the LED display system in a 24-bit full color (True Color) format, which is greatly reduced. The degree of distortion of the image. 2. Since the DMX5 12 signal format used in the encoding and decoding system of the present invention is an international standard, various lighting industries or display industries can adopt the system architecture of the present invention, and the industrial utilization is excellent. Although the present invention has been described above in terms of a preferred embodiment, it is not intended to limit the invention, and it is intended that the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims. 13 1344299 [Brief Description of the Drawings] In order to make the above and other objects, features, advantages, and embodiments of the present invention more obvious and obvious, the detailed description of the drawings is as follows: A schematic diagram of an LED display system with an embedded microprocessor in accordance with a preferred embodiment of the invention. Figure 2 is a schematic illustration of a window interface in accordance with a preferred embodiment of the present invention. Figure 3 is a schematic diagram of an image capture controller not in accordance with a preferred embodiment of the present invention. Figure 4 is a schematic diagram of a digital multiplexed code controller in accordance with a preferred embodiment of the present invention. FIG. 5 is a schematic diagram of a signal format of a DMX 512 according to a preferred embodiment of the present invention. Figure 6 is a schematic diagram of a digital multiplex decoding controller in accordance with a preferred embodiment of the present invention. Figure 7 is a schematic illustration of an lED display system in accordance with a preferred embodiment of the present invention. [Main component symbol description] 100 : LED display system 111 . Windows interface 113 : Transmission image display location 115 : Status information display location for transmitting image data 11 〇: Video signal source 112 · Windows interface transmission button 114 : Transmission image data display Signal 120: Image capture controller 14 1344299 m: Microprocessor module 123: Address generator 125: Data controller 127: Output encoder 13 1 : Receive module 133: Address generator 135: Data controller 137: DMX signal encoder 141. DMX signal decoder 143: data register 150: LED display 210: window operation interface 230. DMX codec module 122: dual clock register 124. data memory 126. Clock generator 13 〇 digital multiplex encoder controller 132. Receive register 134: data memory 136: output register enable circuit 140: digital multiplex decoding controller 142: LED curve correction table 144: PWM conversion Circuit 200 : LED display system 220 : image capture module 240 : LED display 15