TWI428908B - Display and method for transmitting image data therein - Google Patents

Description

Display device and method for transmitting image data therein

The present invention relates to a method of transmitting image data, and more particularly to a method of transmitting image data to a driver in a display device via a low swing differential signal (RSDS) transmission interface.

Reduced swing differential signaling (RSDS) is a differential transmission interface with a signal swing of approximately 200 mV, which defines the output characteristics of the transmitter and receiver, and the wafer between the timing controller and the driver. The communication protocol for the chip interface also has many advantages of signal transmission, such as: being less susceptible to noise interference, low electromagnetic interference, and low power loss.

However, whenever image data (including pixel data composed of a plurality of bits) is transmitted from the timing controller to the driver in the display device via the RSDS transmission interface, the image data is usually one bit by one single controller. The way to transmit; therefore, the transmission of image data between the timing controller and the drive is usually very slow and inefficient. Therefore, the transmission of image data cannot be performed efficiently, and the operation speed of the display device cannot be improved.

It is an object of the present invention to provide a display device whereby its operating speed is improved.

Another object of the present invention is to provide a method of transmitting image data in a display device whereby image data transmission is more efficient.

One aspect of the present invention relates to a display device including a first timing controller, a second timing controller, and a source driver. The first timing controller includes a first transmitter, the first transmitter is coupled to a first bus, and the first timing controller is configured to transmit the first pixel data via the first bus. The second timing controller includes a second transmitter, the second transmitter is coupled to a second bus, and the second timing controller is configured to transmit the second pixel data via the second bus. The source driver includes a receiver and a plurality of channels, wherein the receiver is connected to the first bus bar and the second bus bar, and the source driver is configured to receive the first pixel data and the second pixel data, and according to a convergence The row mode reorganizes the first pixel data and the second pixel data to generate third pixel data for operation in the above channel.

Another aspect of the present invention relates to a method for transmitting image data in a display device, comprising: transmitting a first pixel data to a source driver via a first bus bar; transmitting a second via a second bus bar The pixel data is transferred to the source driver; the first pixel data and the second pixel data are reconstructed in the source driver; and the third pixel data is generated according to the recombination result of the first pixel data and the second pixel data A plurality of channels in the source driver operate.

According to the technical content of the present invention, the method for transmitting image data can improve the efficiency and speed of image data transmission, thereby further improving the operation speed of the display device.

1 is a schematic block diagram showing a display device in accordance with an embodiment of the present invention. The display device includes a first timing controller 100, a second timing controller 110, and a source driver 120. The first timing controller 100 includes a transmitter 102; in one embodiment, the transmitter 102 is a reduced swing differential signaling (RSDS) transmitter. The second timing controller 110 includes another transmitter 112; in one embodiment, the transmitter 112 can also be a low swing differential signal (RSDS) transmitter. Two transmitters 102 and 112 are coupled to busbars 104 and 114, respectively, for transmitting first pixel data and second pixel data to source driver 120 via busbars 104 and 114, respectively.

The source driver 120 includes a receiver 122 and a plurality of channels 124, wherein the receiver 122 can be implemented by a line buffer. The receiver 122 is connected to the bus bars 104 and 114 and receives first pixel data and second pixel data from the first timing controller 100 and the second timing controller 110, respectively, wherein the first pixel data includes A0. , A1, A2, A3, etc., the second pixel data includes B0, B1, B2, B3, etc., and one material (such as: A0) corresponds to one pixel in the display device. .

In addition, the receiver 122 recombines the first pixel data and the second pixel data according to a bus pattern to generate third pixel data for operation by the channel 124. In one embodiment, the receiver 122 selectively selects the data in the first pixel data and the second pixel data to output as the third pixel data for operation by the channel 124.

FIG. 2 is a timing diagram showing data transmission as shown in FIG. 1 according to an embodiment of the present invention. Here, the A bus bar represents a bus bar 104 for transmitting the first pixel data (ie, A0, A1, A2, A3, ...) from the first timing controller 100, and the B bus bar is represented by the second bus. The timing controller 110 transmits the bus bar 114 of the second pixel data (ie, B0, B1, B2, B3, ...), and the C bus bar represents the confluence for the receiver 122 to transmit the third pixel data to the channel 124. Row (not shown).

First, when the enable input/output (EIO) is activated, the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2, B3.. Received from the first timing controller 100 and the second timing controller 110 to the receiver 122 in the source driver 120, respectively. Next, the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2, B3 are recombined by the receiver 122 in the source driver 120, and the third The pixel data is generated based on the result of the recombination of the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2, B3. In this embodiment, the data transmission system operates in three busbar modes, namely, ABAB, AABB, and AAAA modes. When the bus mode is the ABAB mode, the receiver 122 selectively selects one of the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2, B3... One of them uses the output as the third pixel data. Specifically, the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2, B3 are reorganized into the third pixel data A0, B0, A1, B1. , A2, B2, A3, B3, ... are transmitted for the C bus. In an embodiment, the first timing controller 100 and the second timing controller 110 both transmit pixel data at a first timing frequency, and the receiver 122 outputs third pixel data at a second timing frequency. Channel 124 operates with a second timing frequency that is twice the first timing frequency.

On the other hand, when the bus mode is the AABB mode, the receiver 122 selectively selects the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2. B3...both of which use the output as the third pixel data. Specifically, the first pixel data A0, A1, A2, A3, ... and the second pixel data B0, B1, B2, B3 are reorganized into the third pixel data A0, A1, B0, B1. , A2, A3, B2, B3, ... are transmitted for the C bus.

In another aspect, when the bus mode is the AAAA mode, the second timing controller 110 is disabled, and only the first timing controller 100 transmits the first pixel data A0, A1, A2, A3... To the receiver 122. At this time, the C bus bar transmits only the pixel data A0, A1, A2, A3, and the like.

It can be seen from the above embodiments of the present invention that the method for transmitting image data can improve the efficiency and speed of image data transmission, thereby further improving the operation speed of the display device.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100. . . First timing controller

102, 112. . . launcher

104, 114. . . Busbar

110. . . Second timing controller

120. . . Source driver

122. . . receiver

124. . . aisle

1 is a schematic block diagram showing a display device in accordance with an embodiment of the present invention.

FIG. 2 is a timing diagram showing data transmission as shown in FIG. 1 according to an embodiment of the present invention.

100. . . First timing controller

102, 112. . . launcher

104, 114. . . Busbar

110. . . Second timing controller

120. . . Source driver

122. . . receiver

124. . . aisle

Claims (13)

A display device includes: a first timing controller, including a first transmitter, the first transmitter is coupled to a first bus, the first timing controller is configured to pass the first bus Transmitting a first pixel data; a second timing controller comprising a second transmitter, the second transmitter being coupled to a second bus, the second timing controller for transmitting via the second bus a second pixel data; and a source driver comprising a receiver and a plurality of channels, the receiver being coupled to the first bus bar and the second bus bar, the source driver being configured to receive the first pixels The pixel data and the second pixel data, and reconstructing the first pixel data and the second pixel data according to a bus pattern to generate third pixel data for operation on the channels, wherein The first timing controller transmits the first pixel data at a first timing frequency, and the second timing controller transmits the second pixel data at the first timing frequency, the receiver Two timing frequencies output the third pixels Material, the second line for the timing frequency of the frequency twice the first timing. The display device of claim 1, wherein when the bus bar mode is a first mode, the first timing controller transmits the first pixel data, and the second timing controller fails. The display device of claim 1, wherein the receiver selectively selects one of the first pixel data and one of the second pixel data when the bus pattern is a second mode. Output as the Some third pixel data. The display device of claim 1, wherein the receiver selectively selects the first pixel data and the second pixel data when the bus mode is a third mode. And output as the third pixel data. The display device of claim 1, wherein the receiver selectively selects the first pixel data and the second pixel data for output as the third pixel data. The display device of claim 1, wherein the first pixel data and the second pixel data are transmitted when the consistent input/output signal is activated. The display device of claim 1, wherein the first transmitter and the second transmitter are both low swing differential signal transmitters. A method for transmitting image data in a display device, comprising: transmitting a first pixel data to a source driver via a first bus bar; transmitting second pixel data to the source driver via a second bus bar; Recombining the first pixel data and the number in the source driver a second pixel data; and generating, according to the result of the recombination of the first pixel data and the second pixel data, a third pixel data for operating in a plurality of channels in the source driver, wherein the first pixels The pixel data and the second pixel data are transmitted at a first timing frequency, and the third pixel data is transmitted in the source driver at a second timing frequency, the second timing frequency It is twice the first timing frequency. The method of claim 8, wherein the step of recombining the first pixel data and the second pixel data further comprises: selectively selecting one of the first pixel data and the second One of the pixel data is used to generate the third pixel data. The method of claim 8, wherein the step of recombining the first pixel data and the second pixel data further comprises: selectively selecting the first pixel data and the second Two of the pixel data are used to generate the third pixel data. The method of claim 8, wherein the step of recombining the first pixel data and the second pixel data further comprises: selectively selecting the first pixel data and the second pixel data To generate the third pixel data. The method of claim 8, wherein the consistent input/output When the signal is activated, the first pixel data and the second pixel data are transmitted. The method of claim 8, wherein the first pixel data and the second pixel data are transmitted via a low swing differential signal bus.