TW202401404A - LED driving chip for manufacturing single-wire chained communication link in Mini-LED backlight module - Google Patents
LED driving chip for manufacturing single-wire chained communication link in Mini-LED backlight module Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
Description
本發明涉及積體電路與通訊技術領域，尤其涉及一種用於製造次毫米LED (Mini-LED)背光模組中單線鏈式通信鏈路的LED驅動晶片。The present invention relates to the fields of integrated circuits and communication technologies, and in particular to an LED driver chip used for manufacturing single-line chain communication links in sub-millimeter LED (Mini-LED) backlight modules.
隨著LCD顯示技術的發展，使用Mini-LED背光矩陣作為顯示面板背光源的顯示技術已經成為當前重要技術發展方向之一。目前主流的顯示設備廠商採用的Mini-LED背光模組相對於傳統LED背光模組方案，具有尺寸更小、可控分區數量更多、混光距離更短的優點，故顯示效果更佳。Mini-LED背光模組中需要配置數量較多的驅動晶片對LED燈珠的工作狀態進行控制，現有技術中有使用一顆驅動晶片來控制鄰近的四顆LED燈珠的實施方式。而對於數量眾多的驅動晶片而言，採用單線鏈式通信方式會極大降低佈線複雜程度。如圖1所示之現有技術中的一種Mini-LED背光模組的驅動晶片的單線鏈式通信鏈路方式。上述鏈路形式雖然已經大大簡化了連線複雜度但仍有缺陷，即，按照以上方式連線時，由於每個驅動晶片的輸入端口和輸出端口是位於晶片上固定位置，因此不同列的晶片需要旋轉一定的角度，這給晶片擺放增加了成本。其次，如果鏈路中有一顆晶片損壞了，那麼其後的晶片將無法正常通信。With the development of LCD display technology, display technology using Mini-LED backlight matrix as the backlight source of the display panel has become one of the current important technological development directions. Compared with traditional LED backlight module solutions, the Mini-LED backlight modules currently used by mainstream display equipment manufacturers have the advantages of smaller size, more controllable partitions, and shorter light mixing distance, so the display effect is better. Mini-LED backlight modules need to be equipped with a large number of driver chips to control the working status of LED lamp beads. In the existing technology, there is an implementation method of using one driver chip to control four adjacent LED lamp beads. For a large number of driver chips, the single-wire chain communication method will greatly reduce the wiring complexity. As shown in Figure 1, a single-wire chain communication link method of a driver chip of a Mini-LED backlight module in the prior art is shown. Although the above link form has greatly simplified the wiring complexity, it still has defects. That is, when connecting according to the above method, since the input port and output port of each driver chip are located at fixed positions on the chip, chips in different columns A certain angle of rotation is required, which increases the cost of wafer placement. Secondly, if one chip in the link is damaged, subsequent chips will not be able to communicate properly.
由此可見，現有技術中需要能夠克服上述缺陷、能夠簡化Mini-LED背光模組在製造過程中對LED燈珠的驅動晶片進行配置所需工作的一種新的單線鏈式通訊晶片。It can be seen that there is a need in the existing technology for a new single-wire chain communication chip that can overcome the above defects and simplify the work required to configure the driver chip of the LED lamp bead during the manufacturing process of the Mini-LED backlight module.
本發明所要實現的技術目的在於提供一種用於製造Mini-LED背光模組的單線鏈式通信鏈路的LED驅動晶片，該LED驅動晶片能夠簡化在Mini-LED背光模組在製造過程中對LED燈珠驅動晶片進行配置。The technical purpose to be achieved by the present invention is to provide an LED driver chip for a single-line chain communication link used in manufacturing Mini-LED backlight modules. The LED driver chip can simplify the processing of LEDs during the manufacturing process of Mini-LED backlight modules. The lamp bead driver chip is configured.
基於上述技術目的，本發明提供一種用於製造Mini-LED背光模組中單線鏈式通信鏈路的LED驅動晶片，所述LED驅動晶片包括：主控制器、第一輸入輸出端口、第一端口偵測電路、第二輸入輸出端口以及第二端口偵測電路；所述第一輸入輸出端口與第二輸入輸出端口在空閒時為高阻狀態，當所述第一輸入輸出端口與第二輸入輸出端口中的一個被檢測到電位發生變化時，則該電位發生變化的所述第一輸入輸出端口或第二輸入輸出端口被主控制器設置為輸入端口，並開始接收資料；同時，所述第一輸入輸出端口與第二輸入輸出端口中的另一個則被主控制器設置為輸出端口，主控制器將需要發送的資料發送到所述輸出端口，並傳輸至單線鏈式通信鏈路上的下一個LED驅動晶片。Based on the above technical objectives, the present invention provides an LED driver chip for manufacturing a single-line chain communication link in a Mini-LED backlight module. The LED driver chip includes: a main controller, a first input and output port, a first port Detection circuit, second input/output port and second port detection circuit; the first input/output port and the second input/output port are in a high impedance state when idle. When the first input/output port and the second input/output port When one of the output ports detects a change in potential, the first input or output port or the second input or output port whose potential changes is set as an input port by the main controller and starts receiving data; at the same time, the The other one of the first input and output port and the second input and output port is set as an output port by the main controller. The main controller sends the data to be sent to the output port and transmits it to the single-line chain communication link. The next LED driver chip.
在一個實施例中，所述第一端口偵測電路及第二端口偵測電路具有相同的電路結構；該電路結構包括：資料輸入偵測端、致能信號端、及運算邏輯閘、第一反相器、第二反相器、金屬氧化物半導體(MOS)電晶體和上拉電阻；所述資料輸入偵測端連接及運算邏輯閘的輸出端，所述及運算邏輯閘的一個輸出端連接於所述第一反相器的輸出端，所述及運算邏輯閘的另一個輸出端連接於所述致能信號端，所述第二反相器的輸入端連接所述致能信號端，所述第二反相器的輸出端連接所述MOS電晶體的閘極，所述MOS電晶體的源極接地連接，所述MOS電晶體的汲極與第一反相器的輸入端連接，所述上拉電阻的一端與所述MOS電晶體的汲極連接，另一端與外部上拉高電位連接；所述MOS電晶體的汲極還與輸入輸出端口連接，即第一端口偵測電路中的所述MOS電晶體的汲極與第一輸入輸出端口連接，第二端口偵測電路中的所述MOS電晶體的汲極與第二輸入輸出端口連接。In one embodiment, the first port detection circuit and the second port detection circuit have the same circuit structure; the circuit structure includes: a data input detection terminal, an enable signal terminal, and an operation logic gate, a first an inverter, a second inverter, a metal oxide semiconductor (MOS) transistor and a pull-up resistor; the data input detection terminal is connected to the output terminal of the arithmetic logic gate, and one output terminal of the arithmetic logic gate Connected to the output terminal of the first inverter, the other output terminal of the AND logic gate is connected to the enable signal terminal, and the input terminal of the second inverter is connected to the enable signal terminal , the output terminal of the second inverter is connected to the gate of the MOS transistor, the source of the MOS transistor is connected to ground, and the drain of the MOS transistor is connected to the input terminal of the first inverter. , one end of the pull-up resistor is connected to the drain of the MOS transistor, and the other end is connected to the external pull-up high potential; the drain of the MOS transistor is also connected to the input and output ports, that is, the first port detection The drain of the MOS transistor in the circuit is connected to the first input and output port, and the drain of the MOS transistor in the second port detection circuit is connected to the second input and output port.
在一個實施例中，所述第一輸入輸出端口和第二輸入輸出端口設置在LED驅動晶片的旋轉對稱的兩個接腳位置。In one embodiment, the first input-output port and the second input-output port are arranged at two rotationally symmetrical pin positions of the LED driver chip.
本發明的另一態樣在於提供一種用於製造Mini-LED背光模組的單線鏈式通信鏈路，所述單線鏈式通信鏈路包括一個主機與多個從機，所述從機由前述的LED驅動晶片構成。Another aspect of the present invention is to provide a single-wire chain communication link for manufacturing Mini-LED backlight modules. The single-wire chain communication link includes a host and a plurality of slaves. The slaves are composed of the aforementioned Made up of LED driver chips.
在一個實施例中，當所述單線鏈式通信鏈路中的一個從機損壞且無法接收或發送資料時，所述主機使用其資料接收端將要傳輸的資料反向傳輸向單線鏈式通信鏈路。In one embodiment, when a slave in the single-wire chain communication link is damaged and cannot receive or send data, the host uses its data receiving end to reversely transmit the data to be transmitted to the single-wire chain communication link. road.
與現有技術相比，本發明的一個或多個實施例可以具有如下發明點及優勢。Compared with the prior art, one or more embodiments of the present invention may have the following inventive points and advantages.
本發明的LED驅動晶片的輸入端口和輸出端口可以根據實際通信情況進行自適應配置，從而簡化了Mini-LED背光模組在製造過程中對LED驅動晶片進行擺放配置的工作量。The input port and output port of the LED driver chip of the present invention can be adaptively configured according to actual communication conditions, thereby simplifying the workload of placing and configuring the LED driver chip during the manufacturing process of the Mini-LED backlight module.
本發明的其它特徵和優點將在隨後的說明書中闡述，並且，部分地從說明書中變得顯而易見，或者通過實施本發明而瞭解。本發明的目的和其他優點可通過在說明書、申請專利範圍以及附圖中所特別指出的結構來實現和獲得。Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the present invention may be realized and obtained by the structure particularly pointed out in the specification, patent claims and drawings.
為使本發明的目的、技術方案和優點更加清楚，以下結合附圖對本發明作進一步地詳細說明。 ＜實施例＞ In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. <Example>
如圖2和3所示的本實施例的單線鏈式通信鏈路及LED驅動晶片，所述LED驅動晶片包括主控制器1、第一輸入輸出端口2、第一端口偵測電路3、第二輸入輸出端口4以及第二端口偵測電路5。在本實施例中，所述第一輸入輸出端口2與第二輸入輸出端口4並不指定為固定輸入端口或輸出端口，而是根據端口所檢測到的電位信號的變化自適應地將其配置為輸入端口或輸出端口。即每個驅動晶片的兩個端口均為雙向輸入輸出(IO)端口IO1、IO2，並等待輸入信號，當一個端口檢測到輸入信號後，即在該端口接收資料，並在另外一端口輸出。As shown in Figures 2 and 3, the single-wire chain communication link and LED driver chip of this embodiment include a main controller 1, a first input and output port 2, a first port detection circuit 3, and a third Two input and output ports 4 and a second port detection circuit 5. In this embodiment, the first input and output port 2 and the second input and output port 4 are not designated as fixed input ports or output ports, but are configured adaptively according to changes in the potential signals detected by the ports. Is an input port or an output port. That is, the two ports of each driver chip are bidirectional input and output (IO) ports IO1 and IO2, and wait for input signals. When one port detects an input signal, it receives data on that port and outputs it on the other port.
在本實施例中，LED驅動晶片的第一輸入輸出端口2和第二輸入輸出端口4在空閒時為高阻輸出狀態，其被外部上拉為高電位（或下拉為低電位），當所述第一輸入輸出端口2和第二輸入輸出端口4中的一個被檢測到電位變低（或變高）時，即認為有輸入信號，則該輸入輸出端口被定義為輸入端口，並由該端口開始接收資料；同時，所述第一輸入輸出端口2和第二輸入輸出端口4中的另一個則被定義為輸出端口，並將需要發送的資料發送到另一個輸入輸出端口，由其向下一個LED驅動晶片輸出。In this embodiment, the first input and output port 2 and the second input and output port 4 of the LED driver chip are in a high-impedance output state when idle, and are externally pulled up to a high potential (or pulled down to a low potential). When one of the first input and output port 2 and the second input and output port 4 is detected to have a low (or high) potential, it is considered that there is an input signal, and the input and output port is defined as an input port, and is determined by the The port begins to receive data; at the same time, the other of the first input and output port 2 and the second input and output port 4 is defined as an output port, and the data that needs to be sent is sent to the other input and output port, which is then sent to the other input and output port. The next LED driver chip output.
本實施例中的第一端口偵測電路3及第二端口偵測電路5具有相同的電路結構。如圖4所示，該電路結構包括：資料輸入偵測端10、致能信號端20、及運算邏輯閘30、第一反相器40、第二反相器50、MOS電晶體60及上拉電阻70。其中所述資料輸入偵測端10連接及運算邏輯閘30的輸出端，所述及運算邏輯閘30的一個輸出端連接於第一反相器40的輸出端，所述及運算邏輯閘30的另一個輸出端連接於所述致能信號端20，所述第二反相器50的輸入端連接所述致能信號端20，所述第二反相器50的輸出端連接所述MOS電晶體60的閘極，所述MOS電晶體60的源極接地連接，所述MOS電晶體60的汲極與第一反相器40的輸入端連接，所述上拉電阻70的一端與所述MOS電晶體60的汲極連接，另一端與上拉高電位V DD連接。同時所述MOS電晶體60的汲極還與輸入輸出端口連接，即第一端口偵測電路3中的所述MOS電晶體60的汲極與第一輸入輸出端口2連接，第二端口偵測電路5中的所述MOS電晶體60的汲極與第二輸入輸出端口4連接。 The first port detection circuit 3 and the second port detection circuit 5 in this embodiment have the same circuit structure. As shown in Figure 4, the circuit structure includes: data input detection terminal 10, enable signal terminal 20, and operation logic gate 30, first inverter 40, second inverter 50, MOS transistor 60 and above Pull resistor 70. The data input detection terminal 10 is connected to the output terminal of the AND operation logic gate 30 , and one output end of the AND operation logic gate 30 is connected to the output end of the first inverter 40 . The other output terminal is connected to the enable signal terminal 20 , the input terminal of the second inverter 50 is connected to the enable signal terminal 20 , and the output terminal of the second inverter 50 is connected to the MOS circuit. The gate of the crystal 60 and the source of the MOS transistor 60 are connected to ground. The drain of the MOS transistor 60 is connected to the input terminal of the first inverter 40. One end of the pull-up resistor 70 is connected to the ground. The drain of the MOS transistor 60 is connected, and the other end is connected to the pull-up high potential V DD . At the same time, the drain of the MOS transistor 60 is also connected to the input and output port, that is, the drain of the MOS transistor 60 in the first port detection circuit 3 is connected to the first input and output port 2, and the second port detection The drain of the MOS transistor 60 in the circuit 5 is connected to the second input-output port 4 .
在本實施例中，當所述第一輸入輸出端口2和第二輸入輸出端口4處於空閒狀態時，即沒有輸入輸出信號時，所述致能信號端20保持高電位狀態，由此所述MOS電晶體60由於閘極處於低電位狀態而處於關斷狀態，此時的第一輸入輸出端口2或第二輸入輸出端口4由上拉電阻70和外部上拉高電位V DD作用處於高電位狀態。 In this embodiment, when the first input and output port 2 and the second input and output port 4 are in an idle state, that is, when there is no input or output signal, the enable signal terminal 20 maintains a high potential state, whereby the The MOS transistor 60 is in the off state because the gate is in a low potential state. At this time, the first input and output port 2 or the second input and output port 4 are at a high potential due to the pull-up resistor 70 and the external pull-up high potential V DD . condition.
在所述致能信號端20保持高電位狀態下時，一旦所述第一輸入輸出端口2或第二輸入輸出端口4處於低電位狀態，則表示該輸入輸出端口一定是被其他外部信號下拉造成的。結合本實施中的單線鏈式通訊鏈路的結構，可以判定一定是通信鏈路的上游方向的其他通信節點向當前通信節點的所述第一輸入輸出端口2或第二輸入輸出端口4輸入了信號。根據上述電路結構可知，當所述第一輸入輸出端口2或第二輸入輸出端口4處於低電位狀態時，則所述資料輸入偵測端10將輸出高電位信號，該信號輸入給主控制器1後由主控制器將該輸出高電位信號的所述資料輸入偵測端10所在的端口偵測電路連接的輸入輸出端口設置為輸入端口，並保持該端口偵測電路的致能信號端20保持為高電位狀態，以保證不影響輸入資料的準確性。同時，由於本發明中的通信晶片只設置有兩個輸入輸出端口，因此由主控制器1將另一個輸入輸出端口設置為輸出端口。由所述主控制器1處理後的資料信號由設置為輸出端口側的端口偵測電路中的致能信號端20進行輸出，即當致能信號端20為高電位時，輸出端口被上拉至高電位，當致能信號端20為低電位時，輸出端口被下拉至低電位。由此可以將主控制器1要輸出的信號輸出至輸出端口。When the enable signal terminal 20 remains in a high-potential state, once the first input-output port 2 or the second input-output port 4 is in a low-potential state, it means that the input-output port must be pulled down by other external signals. of. Combined with the structure of the single-line chain communication link in this implementation, it can be determined that other communication nodes in the upstream direction of the communication link must have input to the first input and output port 2 or the second input and output port 4 of the current communication node. signal. According to the above circuit structure, when the first input/output port 2 or the second input/output port 4 is in a low potential state, the data input detection terminal 10 will output a high potential signal, and this signal is input to the main controller. 1. Afterwards, the main controller sets the input and output port connected to the port detection circuit where the data input detection terminal 10 of the output high-potential signal is located as an input port, and maintains the enable signal terminal 20 of the port detection circuit. Keep it in a high potential state to ensure that the accuracy of the input data is not affected. At the same time, since the communication chip in the present invention is only provided with two input and output ports, the main controller 1 sets the other input and output port as an output port. The data signal processed by the main controller 1 is output by the enable signal terminal 20 in the port detection circuit set as the output port side. That is, when the enable signal terminal 20 is at a high potential, the output port is pulled up. to a high potential, when the enable signal terminal 20 is at a low potential, the output port is pulled down to a low potential. In this way, the signal to be output by the main controller 1 can be output to the output port.
由圖2所示的單線鏈式通信鏈路可知，由於本發明中的LED驅動晶片並未固定地指定第一輸入輸出端口2或第二輸入輸出端口4具體為輸入端口或輸出端口，因此，當本發明中的LED驅動晶片上的第一輸入輸出端口2和第二輸入輸出端口4設置在晶片上旋轉對稱的接腳位置上時，所述通信晶片在向在LED背光板上進行焊接配置過程中是可以不考慮晶片方向進行隨意擺放的，如圖5所示。這將大大減少LED背光板在製造過程中所消耗的施工成本。It can be seen from the single-wire chain communication link shown in Figure 2 that since the LED driver chip in the present invention does not specifically specify the first input and output port 2 or the second input and output port 4 as an input port or an output port, therefore, When the first input and output port 2 and the second input and output port 4 on the LED driver chip of the present invention are arranged at rotationally symmetrical pin positions on the chip, the communication chip is soldered to the LED backlight board. During the process, the wafer can be placed at will regardless of the direction, as shown in Figure 5. This will greatly reduce the construction costs consumed in the manufacturing process of LED backlight panels.
如圖6所示，由本實施例中的LED驅動晶片所構成的單線鏈式通信鏈路，在其通信鏈路上出現某一通信節點的LED驅動晶片出現損壞而導致通信資料傳輸中斷時，通信主機可以利用其原本的資料接收端將要傳輸的資料反向傳輸出去。這種情況下，所述通信主機的資料端口均變為資料輸出端口，向通信鏈路的首位兩個方向輸出資料。從而保證除損壞的LED驅動晶片之外的其他LED驅動晶片能接收到通信主機發出的信號。當然在這種狀態下，將使得通信主機無法在接收到從機發出的資料。但在特殊情況下，上述通信方式能夠起到某種作用，例如LED背光板檢測時。As shown in Figure 6, in the single-line chain communication link composed of the LED driver chip in this embodiment, when the LED driver chip of a certain communication node is damaged on the communication link, causing the communication data transmission to be interrupted, the communication host The original data receiving end can be used to reversely transmit the data to be transmitted. In this case, the data ports of the communication host become data output ports, and data are output to the first two directions of the communication link. This ensures that other LED driver chips except the damaged LED driver chip can receive the signal sent by the communication host. Of course, in this state, the communication host will be unable to receive data from the slave. But in special circumstances, the above communication method can play a certain role, such as when detecting LED backlight panels.
以上所述，僅為本發明的具體實施案例，本發明的保護範圍並不侷限於此，任何熟悉本領域的技術人員在本發明所述的技術規範內，對本發明的修改或替換，都應在本發明的保護範圍之內。The above are only specific implementation examples of the present invention. The protection scope of the present invention is not limited thereto. Any modification or replacement of the present invention within the technical specifications described in the present invention by any person familiar with the art should be made. within the protection scope of the present invention.
1:主控制器 2:第一輸入輸出端口 3:第一端口偵測電路 4:第二輸入輸出端口 5:第二端口偵測電路 10:資料輸入偵測端 20:致能信號端 30:及運算邏輯閘 40:第一反相器 50:第二反相器 60:MOS電晶體 70:上拉電阻 IO1,IO2:輸入輸出端口 V DD:外部上拉高電位 1: Main controller 2: First input and output port 3: First port detection circuit 4: Second input and output port 5: Second port detection circuit 10: Data input detection terminal 20: Enable signal terminal 30: AND operation logic gate 40: first inverter 50: second inverter 60: MOS transistor 70: pull-up resistor IO1, IO2: input and output port V DD : external pull-up high potential
附圖用來提供對本發明的進一步理解，並且構成說明書的一部分，與本發明的實施例共同用於解釋本發明，並不構成對本發明的限制。在附圖中： 圖1是現有技術之Mini-LED背光矩陣中的單線鏈式通信鏈路示意圖； 圖2是本發明的Mini-LED背光矩陣中的單線鏈式通信鏈路示意圖； 圖3是本發明的Mini-LED背光矩陣中的LED驅動晶片結構示意圖； 圖4是本發明的LED驅動晶片中端口偵測電路的結構示意圖； 圖5是本發明另一實施方式的單線鏈式通信鏈路結構示意圖；以及 圖6是本發明的單線鏈式通信鏈路中出現損壞晶片時的資料傳輸示意圖。 The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation of the present invention. In the attached picture: Figure 1 is a schematic diagram of a single-line chain communication link in a Mini-LED backlight matrix in the prior art; Figure 2 is a schematic diagram of the single-line chain communication link in the Mini-LED backlight matrix of the present invention; Figure 3 is a schematic structural diagram of the LED driver chip in the Mini-LED backlight matrix of the present invention; Figure 4 is a schematic structural diagram of the port detection circuit in the LED driver chip of the present invention; Figure 5 is a schematic structural diagram of a single-line chain communication link according to another embodiment of the present invention; and Figure 6 is a schematic diagram of data transmission when a damaged chip occurs in the single-wire chain communication link of the present invention.
1:主控制器 1: Main controller
2:第一輸入輸出端口 2: First input and output port
3:第一端口偵測電路 3: First port detection circuit
4:第二輸入輸出端口 4: Second input and output port
5:第二端口偵測電路 5: Second port detection circuit
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| KR970010371B1 (en) * | 1994-10-21 | 1997-06-25 | 엘지반도체 주식회사 | Bus driving apparatus of computer interface |
| KR100575610B1 (en) * | 1999-08-18 | 2006-05-03 | 매그나칩 반도체 유한회사 | Port circuit |
| CN101882420B (en) * | 2010-06-07 | 2012-01-11 | 杭州士兰微电子股份有限公司 | Led display system |
| TWI414207B (en) * | 2010-07-16 | 2013-11-01 | Macroblock Inc | Serial controller and serial bi-directional controller |
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