CN100397474C - Display device with point-to-point transmission technology - Google Patents

Abstract

A display device with point-to-point transmission technology comprises an intelligent panel and an image processor. The intelligent panel further includes a plurality of source drivers coupled to a pixel array for sending an image data to the pixel array to drive a plurality of pixels therein. In addition, the image processor is respectively coupled to the source drivers in the intelligent panel through a plurality of image data buses. Each image data bus corresponds to one of the source drivers.

Description

Display device with point-to-point transmission technology

technical field

The invention relates to a display device, in particular to a display device using an intelligent panel and having point-to-point transmission technology.

Background technique

In order to make the display panel more integrated, the Panel Standard Work Group (PSWG for short) proposed a smart panel (Smart Panel) architecture. The idea of the smart panel is to combine the current timing control function on the panel side with the image processor (Scaler) on the system side in the panel module architecture. Therefore, there is no need for an additional timing controller on the panel side, thereby achieving the purpose of reducing the cost of module materials.

In the case of an intelligent panel, although the timing control circuits can be integrated on the system board. But in fact, the smart panel only integrates the driver and needs to be connected to the image processor on the system board through a connector (Connector) to receive image data. For a panel with a resolution of SXGA, the image processor needs two connectors to transmit the control signal and image data required to connect to the driver in the smart panel. FIG. 1A and FIG. 1B illustrate a known pin definition table for an SXGA resolution smart panel connector. Wherein, FIG. 1A is used to define the definition of each pin in the first connector, and FIG. 2B is used to define the definition of each pin in the second connector.

Contents of the invention

The object of the present invention is to provide a display device with point-to-point transmission technology, through which the number of data transmission lines can be effectively reduced, so the number of connectors can be reduced, thereby reducing the production cost. The so-called point-to-point transmission technology refers to the transmission protocol between the panel timing control image processor and the source driver, which adopts single-point data transmission instead of serial data transmission.

The invention provides a display device with point-to-point transmission technology, which includes an intelligent panel and an image processor with panel timing control function. Wherein, the smart panel includes a plurality of source drivers coupled to a pixel array to send image data to the pixel array to drive a plurality of pixels therein. In addition, the image processor at the system side is respectively coupled to the source drivers in the smart panel through a plurality of image data buses through a connector. Wherein, each image data bus is respectively corresponding to one of the source drivers.

In an embodiment of the present invention, when the resolution of the smart panel is SXGA, the image processors only need to be coupled to the source drivers through one connector. And this connector has 50 pins.

In addition, each of the above-mentioned image data buses includes at least one red image data transmission line, one green image data transmission line and one blue image data transmission line to respectively transmit red image data, green image data and blue image data to each source pole drive.

Description of drawings

FIG. 1A and FIG. 1B illustrate a pin definition table of a known connector used in a smart panel.

FIG. 2 shows a partial circuit block diagram of a display device with point-to-point transmission technology according to a preferred embodiment of the present invention.

FIG. 3 shows a pin definition table of a connector according to an embodiment of the present invention.

FIG. 4 shows a pin definition table of a connector according to another embodiment of the present invention.

101, 301: image processor

103, 105, 107, 109, 111, 113, 115, 117, 311, 313, 315, 317, 319, 321, 323, 325: source driver

303: Intelligent Panel

327: pixel array

331, 333, 335, 337, 339, 341, 343, 345: image data bus

351: Gamma Correction Generator

Detailed ways

FIG. 2 shows a partial circuit block diagram of a display device with a point-to-point transmission technology according to a preferred embodiment of the present invention. The point-to-point transmission technology refers to a panel timing control image processor and a source driver. The transmission protocol between them adopts single-point data transmission instead of serial data transmission. Referring to FIG. 2 , the display device 300 provided by the present invention includes an image processor 301 and an intelligent panel 303 . In the smart panel 303 , multiple drivers are included, such as drivers 311 , 313 , 315 , 317 , 319 , 321 , 323 and 325 . In addition, each driver is coupled to the pixel array 327 through a plurality of data lines (eg, DL _i ).

As we all know, in the pixel array 327, there are not only a plurality of data lines such as DL _i , but also a plurality of scan lines such as SL _j , which are respectively arranged vertically to the data lines. For example, 329 pixels are arranged at the intersection of each data line and the scan line. Wherein, each driver sequentially transmits the image data from the data line coupled thereto to the pixel array 327 , so as to respectively drive the pixels arranged in the pixel array 327 .

In the present invention, the image processor 301 is respectively coupled to the corresponding source drivers 311-325 through a plurality of image data buses (for example, 331-345). Wherein, each image data bus is respectively corresponding to one of the source drivers. For example, the image data buses 331 , 333 , 335 , 337 , 339 , 341 , 343 and 345 correspond to the source drivers 311 , 313 , 315 , 317 , 319 , 321 , 323 and 325 .

Each image data bus includes at least one red image data transmission line (such as R1-R8), one green image data transmission line (such as G1-G8) and one blue image data transmission line (such as B1-B8). The image processor 301 transmits red image data, green image data and blue image data to the source drivers 311 - 325 through the red image data transmission lines, green image data transmission lines and blue image data transmission lines respectively.

In addition, the image processor 301 also generates a control clock signal CLK to each source driver. In this embodiment, the display device 300 further includes a gamma correction generator 351 for generating a gamma correction voltage to each source driver for gamma correction.

Although the number of source drivers is 8 in FIG. 2 , it is not used to limit the present invention. If the resolution is SXGA, the circuit designer can use 10 source drivers with 384 channels to drive the pixels in the pixel array. If 10 source drivers with 384 channels are used, the image processor still only needs a 50-pin connector to couple all the source drivers on the smart panel. FIG. 3 shows a pin definition table of a connector according to an embodiment of the present invention. It can be clearly seen from FIG. 3 that the present invention only needs to use a 50-pin connector to connect the output signal of the image processor to all the source drivers on the smart panel.

In another alternative embodiment, the electromagnetic interference is improved by frequency division. Therefore, each source driver receives two sets of red image data, green image data and blue image data. At this point, the designer can choose 6 source drivers with 642 channels to drive the pixels in the pixel array. Similarly, the designer still only needs to select a connector with 50 pins to connect the output signal of the image processor to all the source drivers on the smart panel. FIG. 4 shows a pin definition table of a connector according to another embodiment of the present invention, which is suitable for using 6 source drivers with 642 channels.

Although FIG. 3 and FIG. 4 respectively provide a pin definition table of a connector, they are not used to limit the present invention. Those skilled in this art can define the function of each pin of the connector by themselves according to actual needs.

To sum up, since the present invention utilizes point-to-point transmission, the number of bus bits can be reduced. Thus, the output of the video processor can be connected to all the source drivers using only a small number of connectors. Also because the number of connectors is reduced, the manufacturing cost of the display device of the present invention can also be reduced.

Claims (8)

1. A display device with point-to-point transmission technology, characterized in that it comprises: An intelligent panel, including: a pixel array, with a plurality of pixels arranged in an array; a plurality of source drivers, coupled to the pixel array, for sending an image data to the pixel array to drive each pixel respectively; and An image processor is respectively coupled to the plurality of source drivers via a plurality of point-to-point image data buses, wherein each image data bus is respectively corresponding to one of the plurality of source drivers. 2. The display device with point-to-point transmission technology as claimed in claim 1, further comprising a connector for coupling the output signal of the image processor to each source driver. 3. The display device with point-to-point transmission technology as claimed in claim 1, wherein when the resolution of the intelligent panel is SXGA, the image processor only needs to be respectively coupled to the multiple devices through a connector. a source driver. 4. The display device with point-to-point transmission technology as claimed in claim 3, wherein the connector has 50 pins. 5. The display device with point-to-point transmission technology as claimed in claim 1, wherein each image data bus at least comprises: a red image data transmission line for transmitting a red image data to the corresponding source driver; a green image data transmission line for transmitting a green image data to the corresponding source driver; and A blue image data transmission line is used to transmit a blue image data to the corresponding source driver. 6. The display device with point-to-point transmission technology as claimed in claim 5, wherein each image data bus comprises: A pair of red image data transmission lines are used to transmit a red image data to the corresponding source driver; a pair of green image data transmission lines for transmitting a green image data to the corresponding source driver; and A pair of blue image data transmission lines are used to transmit a blue image data to the corresponding source driver. 7. The display device with point-to-point transmission technology as claimed in claim 1, further comprising a gamma correction generator for generating a gamma correction voltage to the plurality of source drivers. 8. The display device with point-to-point transmission technology as claimed in claim 1, wherein the image processor outputs a control clock signal to the plurality of source drivers.

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