KR20160079563A - Data interface apparatus and method, image display system using the same, and driving method thereof - Google Patents

Abstract

The present invention relates to an apparatus and a method for interfacing data to transmit four color data without increasing a data transfer bandwidth by using a three color data format, an image display system using the same, and a driving method thereof. According to the present invention, the method comprises: a step of mapping one among three or four color data to a three color transfer format; a step of mapping white data among the four color data to a position of one color data having a minimum value (zero) among the remaining three color data; a step of indicating a three color mode for the three color data or a four color mode for the four color data, and at the same time, additionally mapping at least one timing signal and mode/color information indicating the color data to which the white data is mapped in the four color mode, to the three color transfer format, so as to transfer the completely mapped three color transfer format; and a step of extracting the three or four color data from the transferred three color transfer format dependent on the mode/color information to output the extracted data.

Description

Technical Field [0001] The present invention relates to a data interface apparatus and method, an image display system using the same and a driving method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data interface device, and more particularly, to a data interface device and method capable of transmitting four-color data using a three-color data format without increasing the data transmission bandwidth, and a video display system using the same and a driving method thereof .

2. Description of the Related Art Generally, a display device such as a liquid crystal display (LCD), an organic light emitting diode (OLED) display, and the like includes red (R), green (G) And blue (hereinafter, referred to as B) sub-pixels are arranged in a matrix form.

In order to increase the luminance while reducing the power consumption, the display device uses a RWGB-structured pixel to which white (W) sub-pixels with higher light emission efficiency than the RGB sub-pixels are added.

In order to drive the RWGB pixels, the display device converts the RGB data transmitted from the host system into RWGB data by using the RGB-to-RWGB data converter.

Recently, there is a case where it is desired to directly supply RWGB data to the display device in the host system. However, in order to transfer RWGB data from the host system to the display device, the conventional RGB interface must be changed to the RWGB interface, and the data transmission bandwidth such as the number of transmission lines must be increased with an increase in the number of data bits.

However, if the data transmission bandwidth increases, the manufacturing cost increases, and electromagnetic interference (EMI) increases.

It is an object of the present invention to provide a data interface apparatus and method capable of transmitting four-color data using a three-color data format without increasing the data transmission bandwidth, And a driving method thereof.

In order to solve the above problems, a data interface apparatus according to an embodiment of the present invention includes a transmitter and a receiver.

The transmitting unit maps either the three-color data or the four-color data to the three-color transmission format. When mapping the four-color data to the three-color transmission format, the transmitting unit maps the W data among the four-color data to the position of one of the remaining three-color data, that is, the minimum value (0). In addition, the transmission unit indicates the three-color mode for three-color data or the four-color mode for four-color data, and the mode / color information indicating the color data to which the W data is mapped in the four- And transmits the three-color transmission format.

The receiving unit extracts and outputs the three-color data or the four-color data in accordance with the mode / color information from the three-color transmission format transmitted from the transmission unit.

The mode / color information is composed of 2 bits representing the first to fourth information values. Color mode for R, G, and B data when the mode / color information is the first information value, and a three-color mode for the R, W, G, and B data when the mode / color information is the first information value. . Each of the second to fourth information values indicates the position of any one of the color data to which the W data is mapped in the three-color transmission format.

The transmitter includes an LVDS transmitter for mapping three or four color data, mode / color information, and at least one timing signal to a three-color transmission format, converting the three-color or four-color data into LVDS, and outputting a three- do.

The receiver includes an LVDS receiver for restoring the 3-color transmission format from the LVDS transmitted from the LVDS transmitter and for extracting and outputting the 3-color data, the mode / color information, and the timing signal included in the 3-color transmission format. The receiving unit includes a mode determination unit that outputs a three-color mode signal or a four-color mode signal using the mode / color information supplied from the LVDS receiving unit. When the mode / color information supplied from the LVDS receiving unit indicates the four-color mode, the receiving unit converts one of the three-color data supplied from the LVDS receiving unit into W data indicated by the mode / color information, And a data conversion unit for converting the data to the minimum value (0) and outputting the four-color data using the remaining two-color data as it is. The receiving unit includes a multiplexer for selecting and outputting the three-color data supplied from the LVDS receiving unit or the four-color data supplied from the data converting unit according to the three-color mode signal or the four-color mode signal supplied from the mode determining unit.

When the mode / color information supplied from the LVDS receiving unit indicates the four-color mode, if the three-color data supplied from the LVDS receiving unit is the same, the data converting unit sets the W data to the minimum value (0) And outputs the four-color data.

The image display system according to an embodiment of the present invention includes a host system including the transmitter and a receiver for transmitting and receiving three-color data or four-color data in a three-color transmission format including the data interface device described above, And a display device. The display device includes a display panel, a timing controller including a receiver, and a panel driver for driving the display panel with the drive timing controlled by the timing controller.

The host system further comprises a data conversion unit for converting the three-color data into the four-color data and outputting the four-color data to the transmission unit, or the timing controller may convert the three-color data output from the receiving unit into the four- The data conversion unit may further include a data conversion unit.

The data interface method according to the embodiment of the present invention maps one of three-color data or four-color data to a three-color transmission format, and when mapping four-color data to a three-color transmission format, (0) among the remaining three-color data. The data interface method of the present invention is a data interface method for indicating three-color mode for three-color data or four-color mode for four-color data, mode / color information for indicating color data to which the W data is mapped in the four- At least one timing signal is further mapped to the three-color transmission format, and the mapped three-color transmission format is transmitted. The data interface method according to an embodiment of the present invention extracts and outputs the 3-color data or the 4-color data according to the mode / color information from the transmitted 3-color transmission format.

The data interface method of the present invention extracts and outputs three-color data, mode / color information, and timing signals included in the three-color transmission format, and when the mode / color information indicates the three-color mode, Select and output.

In the data interface method of the present invention, when the mode / color information indicates the four-color mode, any color data indicated by the mode / color information among the three color data is converted into the W data, (0), and outputs the four-color data using the remaining two-color data as it is.

A method of driving an image display system according to an embodiment of the present invention transmits and receives three-color data or four-color data in a three-color transmission format using the data interface method described above.

The data interface apparatus and method according to the present invention can transmit RWGB data using a three-color data format by mapping W data to any color data having a minimum data value (0) among RGB data when transmitting RWGB data . In addition, the data interface apparatus and method according to the present invention may further include mode / color information indicating a color having W data among RGB data when the RGB or RWGB data is transmitted, send. Accordingly, the data interface apparatus and method according to the present invention can transmit four-color data using the bandwidth for transmitting three-color data as it is.

Therefore, the image display system and the driving method thereof using the data interface device and method according to the present invention can transmit data for three colors or four colors in the same format without increasing the data transmission bandwidth, so that cost and EMI increase Can be suppressed.

1 is a block diagram schematically showing an image display system according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an RGB-to-RWGB conversion method applied to the host system shown in FIG. 1. Referring to FIG.
3 is an equivalent circuit diagram showing an example of a sub-pixel configuration of an OLED applied to the display panel shown in FIG.
4 is an equivalent circuit diagram illustrating a sub-pixel configuration of a liquid crystal panel applied to the display panel shown in FIG.
5 is a block diagram illustrating a configuration of an LVDS interface device applied to the image display system shown in FIG.
6 is an exemplary view showing a data transmission format of the LVDS interface apparatus shown in FIG.
7 is a diagram showing another data transmission format of the LVDS interface apparatus shown in FIG.
8 is a flowchart illustrating a method of recognizing RGB or RWGB data in a receiving unit built in a timing controller among the interface apparatuses shown in FIG.

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings.

1 is a block diagram schematically showing an image display system according to an embodiment of the present invention.

The image display system shown in Fig. 1 includes a display device 100 and a host system 200. Fig. The display apparatus 100 includes a timing controller 10, a data driver 20 and a gate driver 30 as a panel driver, a display panel 40, and a power supply unit (not shown).

The host system 200 supplies image data and a timing synchronization signal to the display device 100. [ The host system 200 includes a system on chip having a built-in scaler to convert image data into a resolution data format suitable for display on the display panel 40 of the display device 100, do. For example, the host system 200 may be any one of a system of a portable terminal such as a computer, a TV system, a set-top box, a tablet or a cellular phone.

The host system 200 outputs data for three colors for RGB pixels or data for four colors for RWGB pixels to the timing controller 10 of the display device 100. [ The host system 200 may further include a data conversion unit (not shown) for converting RGB data into RWGB data. As shown in FIG. 2, the data conversion unit sets the minimum value among the input R / G / B data as W data and subtracts W data from each input R / G / B data to convert it into R / W / G / B data. Accordingly, it can be understood that the data of at least one color having the minimum value among the RGB data excluding the W data in the R / W / G / B data is the minimum value "0 ". When the host system 200 transmits R / W / G / B data, the host system 200 maps the W data to the position of the data of a color having the minimum value (0) among the RGB data and outputs the W data. Accordingly, the host system 200 can transmit data for four colors using the three-color data transmission format for transmitting RGB data.

The host system 200 and the timing controller 10 transmit and receive data using an LVDS (Low Voltage Differential Signal) interface that transmits data using a low-voltage differential signal when data is transmitted. In particular, the host system 200 and the timing controller 10 of the present invention can transmit and receive three-color data or four-color data using an LVDS interface for transmitting and receiving three-color data.

The LVDS interface transmits data in RGB units or RWGB units corresponding to one pixel per clock. The data format of one pixel transmitted per clock includes three color data and at least one timing signal and at least two bits which are not used. At least one timing signal includes a data enable signal DE (FIG. 6), a vertical synchronization signal Vsync (FIG. 6), a horizontal synchronization signal (Hsync; FIG. 6), or vertical and horizontal synchronization signals (Vsync, Hsync) Can be omitted.

The host system 200 instructs the RGB mode or the RWGB mode and transmits the mode / color information indicating the color having the W data among the RGB data to the unused bit when the RWGB mode is set. Accordingly, the host system 200 transmits the RGB or RWGB data using the three-color data format without increasing the data transmission width, and transmits the mode / color information to the data format of one pixel transmitted per clock And transmits it.

The timing controller 10 receives image data and timing signals and mode / color information from the host system 200 via the LVDS interface.

The timing controller 10 generates a data control signal and a gate control signal for controlling the driving timings of the data driver 20 and the gate driver 30 using the timing signals supplied from the host system 200, 20 and the gate driver 30, respectively. The timing signal supplied from the host system 200 to the timing controller 10 includes a dot clock, a data enable signal, a vertical synchronization signal, and a horizontal synchronization signal, but the vertical synchronization signal and the horizontal synchronization signal may be omitted here. When the vertical synchronizing signal and the horizontal synchronizing signal are omitted, the timing controller 10 counts the data enable signal according to the dot clock to generate a vertical synchronizing signal and a horizontal synchronizing signal.

When the mode / color information supplied from the host system 200 indicates the RGB mode, the timing controller 10 uses the RGB data supplied from the host system 100 as it is, performs image processing such as necessary image quality compensation, do. At this time, the timing controller 10 may include a data conversion unit for converting the RGB data into RWGB data and outputting the converted data, and the data conversion unit may be configured to convert all the RGB data into the RWGB data.

When the mode / color information supplied from the host system 200 indicates the RWGB mode, the timing controller 10 selects one of the three colors (RGB) data supplied from the host system 100, Color data supplied to the host system 100 into RWGB data by converting the data of the W data into the W data and converting the color data in which the W data is located into the minimum value (0) And outputs it.

The timing controller 10 is an embedded point-to-point interface that converts various control information and image data into a serial form including a clock and transmits the serial data in a point-to- Point-to-Point Interface (EPI) technology. The timing controller 10 converts control information and video data into EPI packets containing clocks and transmits EPI packets to the data driver 20 using the EPI protocol. The timing controller 10 transmits EPI packets in the form of differential signals through individual transmission line pairs connected to each of the plurality of data driving ICs.

The EPI packet includes a control packet including a clock and control information in a serial form, a data packet including a clock and a color data of either RGB or RWGB in a serial form, and the internal clock locking of the data driving IC, Lt; RTI ID = 0.0 > a < / RTI > The control information includes a plurality of data control signals necessary for driving each data driving IC and may include a plurality of gate control signals for transferring to the gate driver 30. [

Each of the plurality of data driving ICs constituting the data driver 20 converts a differential signal individually transmitted from the timing controller 10 into an EPI packet, restores clock, control information, and image data from the EPI packet, Into analog data signals and supplies them to the data lines of the display panel (40).

Each of the plurality of data driving ICs constituting the data driver 20 has a reference gamma voltage set supplied from a gamma voltage generator (not shown) provided in itself or separately provided to the outside of the data driver 20, Subdivided into gradation voltages, and then, using the subdivided gradation voltages, converts the digital data into an analog data signal. The data driver 20 converts each of the R / G / B data into an analog R / G / B signal to supply the data to the data lines connected to the R / G / B sub pixels of the display panel 40, W / G / B data into analog R / W / G / B signals and supplies them to the data lines connected to the R / W / G / B sub pixels of the display panel 40, respectively.

Each of the plurality of data driving ICs constituting the data driver 20 is mounted on a circuit film such as TCP (Tape Carrier Package), COF (Chip On Film), FPC (Flexible Print Circuit) Tape Automatic Bonding), or may be mounted on the display panel 40 by a COG (Chip On Glass) method.

The gate driver 30 drives the plurality of gate lines of the display panel 40 in response to the gate control signal supplied from the timing controller 10. [ The gate driver 30 supplies a gate-on voltage to the respective gate lines in response to the gate control signal, and supplies a gate-off voltage in the remaining periods. The gate driver 30 receives the gate control signal from the timing controller 10 or receives the gate control signal from the timing controller 10 via the data driver 20. [ The gate driver 30 is composed of at least one gate IC and mounted on a circuit film such as TCP, COF, FPC or the like and attached to the display panel 40 in a TAB manner or mounted on the display panel 40 in a COG manner . Alternatively, the gate driver 30 may be formed on the thin film transistor substrate together with the thin film transistor array constituting the pixel array of the display panel 40 to form a gate in panel (GIP) type built in the non-display region of the display panel 40 As shown in FIG.

The display panel 40 displays an image through a pixel array in which pixels are arranged in a matrix form. Each pixel of the pixel array is composed of R / W / B / G sub-pixels for luminance enhancement. Alternatively, each pixel may be composed of R / G / B sub-pixels. As the display panel 50, an LCD panel, an OLED panel, or the like can be applied.

For example, if the display panel 40 is an OLED panel, each of the R / W / B / G subpixels is coupled to a high potential power (EVDD) line and a low potential power And a pixel circuit connected to the data line DL and the gate line GL and driving the OLED element. The pixel circuit includes at least a switching transistor ST and a driving transistor DT and a storage capacitor Cst. The switching transistor ST charges the storage capacitor Cst with a voltage corresponding to the data signal from the data line DL in response to the scan pulse from the gate line GL and the drive transistor DT charges the storage capacitor Cst The current supplied to the OLED element is controlled according to the voltage charged in the OLED element Cst.

Alternatively, when the display panel 40 is a liquid crystal panel, each of the R, W, B, and G sub-pixels may include a thin film transistor (e.g., TFT) connected to the gate line GL and the data line DL TFT), a liquid crystal capacitor Clc connected in parallel to the thin film transistor TFT, and a storage capacitor Cst. The liquid crystal capacitor Clc charges the difference voltage between the data signal supplied to the pixel electrode through the thin film transistor TFT and the common voltage Vcom supplied to the common electrode, drives the liquid crystal according to the charged voltage, . The storage capacitor Cst stably maintains the voltage charged in the liquid crystal capacitor Clc.

When each pixel of the display panel 100 includes R / G / B sub-pixels, the timing controller 10 supplies the RGB data from the host system 200 to the data driver 20.

When each pixel of the display panel includes R / W / G / B sub-pixels, the timing controller 10 converts the RGB data supplied from the host system 200 into RWGB data and supplies it to the data driver 20 , The RGB data is converted into RWGB in the host system 200, the RWGB data is converted into the three-color data transmission format, and the supplied three-color data is restored into RWGB data and supplied to the data driver.

FIG. 5 is a block diagram showing an LVDS interface apparatus applied to the image display system shown in FIG. 1, and FIGS. 6 and 7 are diagrams showing a data transmission format of the LVDS interface apparatus shown in FIG. 5 according to the number of bits of each color data FIG.

The LVDS interface device shown in FIG. 5 includes a LVDS transmitter 210 embedded in an output terminal of the host system 200 as a transmitter. The LVDS interface device includes a LVDS receiving unit 12, a mode determining unit 14, a data converting unit 16, and a multiplexer (MUX) 16, which are incorporated in an input terminal of the timing controller 10 as a receiving unit.

The LVDS transmitter 210 embedded in the output terminal of the host system 200 maps RGB or RWGB image data, at least one timing signal, and mode / color information into a transmission format for three colors according to a predetermined mapping table, The transmission format for three colors is converted into an LVDS (low voltage differential signal) and output through a plurality of transmission line pairs.

For example, when each color data has 10 bits in RGB or RWGB image data, the LVDS transmitter 210 separates 35 bits per cycle (P) of the clock into 5 B, C, D, and E, and transmits the clock through one clock transmission line pair (CLK). The 35 bits transmitted per period P of the clock are 10 bits of first color data DT10: DT19, 10 bits of second color data DT20: DT29, 10 bits of third color data DT30: DT39, A 1-bit data enable signal DE, a 1-bit vertical synchronization signal Vsync, a 1-bit horizontal synchronization signal Hsync, and 2-bit mode / color information MI. Here, the vertical synchronization signal Vsync and the horizontal synchronization signal Hsync may be omitted.

Alternatively, when each color data has 8 bits in the RGB or RWGB image data, the LVDS transmitting unit 210 separates 28 bits per period (P) of the clock into four by 7 bits as shown in FIG. 7, (A, B, C, D) and transmits the clock through one clock transmission line pair (CLK). The 28 bits transmitted per period P of the clock are 8 bits of first color data DT10: DT17, 8 bits of second color data DT20: DT27, 8 bits of third color data DT30: DT37, A 1-bit data enable signal DE, and 2-bit mode / color information MI.

When the LVDS transmitting unit 210 transmits the RGB data, the RGB data is mapped to the first through third color data to transmit the three-color data, and [00] is mapped to the mode / Three-color mode).

When the LVDS transmitter 210 transmits the RWGB data, the W data is mapped to the position of any color data whose data value is [0] among RGB, and the remaining two color data are mapped to the corresponding color positions, respectively, (4-color mode) by mapping the W data to [01], [10], and [11] according to the position of the mapped color data in the mode / color information MI, Indicating the location of the color data to which the data is mapped. If the mode / color information (MI) is not [00], it indicates the RWGB mode.

For example, if the mode / color information MI is [01], it indicates that the W data is mapped to the position of the R data. If the mode / color information MI is [01] If the mode / color information MI is [11], it indicates that the W data is mapped to the position of the B data.

On the other hand, the LVDS transmitting unit 210 converts the white color into RGB data except for the W data in the RWGB mode. In other words, the W data is converted into "0 ", and the remaining RGB are converted to have the same data value so as to display the white color, and the RGB data having the same data value are transmitted. At this time, the mode / color information MI is mapped to any one of [01], [10], and [11] rather than [00] to indicate the RWGB mode.

The LVDS receiving unit 12 restores data from the LVDS format transmitted from the LVDS transmitting unit 210 of the host system 200 and extracts the three color data, the timing signal, and the mode / color information MI from the restored data Output.

The mode determination unit 14 outputs the RGB mode signal or the RWGB mode signal to the MUX 18 using the mode / color information MI supplied from the LVDS receiving unit 12. For example, the mode determination unit 14 outputs the RGB mode signal to the MUX 18 when the mode / color information MI from the LVDS receiving unit 12 is [00] Is not [00], the RWGB mode signal is output to the MUX 18.

The data converting unit 16 converts the three-color data supplied from the LVDS receiving unit 12 into RWGB data using the mode / color information MI supplied from the LVDS receiving unit 12, and outputs the RWGB data to the MUX 18. For example, when the mode / color information MI from the LVDS receiving unit 12 is in the RWGB mode other than [00], the mode / color information MI of the three color data supplied from the LVDS receiving unit 12 The W data is extracted from the position of one of the color data indicated by any one of [01], [10] and [11], the color data at the position where the W data is extracted is set to the minimum value (0) Color data is used as it is, thereby converting the three-color data into RWGB data and outputting it to the MUX 18.

On the other hand, when the mode / color information MI indicates the RWGB mode and the three-color data supplied from the LVDS receiving unit 12, that is, the RGB data are mutually the same, the W data value is set to the minimum value (0) And converts the three-color data into RWGB data by using the same RGB data as they are.

The MUX 18 selects and outputs the RGB data from the LVDS transmission unit 12 in accordance with the three color mode signal from the mode determination unit 14 or outputs the RWGB data from the data conversion unit 16 And outputs it.

FIG. 8 is a flow chart illustrating a method of recognizing RGB or RWGB data in a reception unit built in a timing controller among the interface devices shown in FIG. 5, and therefore will be described with reference to FIG.

The mode determination unit 14 inputs the mode / color information MI supplied from the LVDS receiving unit 12 (S2).

The mode determination unit 14 determines that the mode / color information MI is [00] (S4) and outputs the RGB mode signal to the MUX 18 (S6) And selects and outputs the RGB data from the receiving unit 12 (S8).

If the mode / color information MI is not [00], the mode determination unit 14 determines the RWGB mode (S4) and outputs the RWGB mode signal to the MUX 18 (S10).

The data converter 16 determines whether the RGB data from the LVDS receiver 12 are identical to each other (S12) when the mode / color information MI is not the [00] W data to the minimum value (0) (S14), and uses the same RGB data as they are, and outputs the RWGB data through the MUX 18 (S16).

The data conversion unit 16 determines that the RGB data from the LVDS receiving unit 12 are not identical to each other (S12) and the mode / color information MI is not the same when the mode / color information MI is not [00] (S16), the R data of the RGB data from the LVDS receiving unit 12 is extracted as W data, the R data is set to the minimum value (0) (S18), and the RWGB data is sent to the MUX 18 (S16).

The data conversion unit 16 determines that the RGB data from the LVDS receiving unit 12 are not identical to each other (S12) and the mode / color information MI is not the same when the mode / color information MI is not [00] (S20), the G data among the RGB data from the LVDS receiving unit 12 is extracted as W data, the G data is set to the minimum value (0) (S22), and the RWGB data is sent to the MUX 18 (S16).

The data conversion unit 16 determines that the RGB data from the LVDS receiving unit 12 are not identical to each other (S12) and the mode / color information MI is not the same when the mode / color information MI is not [00] (Step S24), the B data of the RGB data from the LVDS receiving unit 12 is extracted as W data, the B data is set to the minimum value (0) (S26), and the RWGB data is sent to the MUX 18 (S16).

5 has been applied to the host system 200 shown in FIG. 1 and the timing controller 10 of the display device 100, it is also possible to transmit image data using the LVDS interface But may be applied to other configurations.

For example, the LVDS interface device shown in Fig. 5 can be applied as it is to the LVDS interface between at least two image processing ICs incorporated for image processing in the display device. For example, the OLED display device may include an image quality compensation IC and a degradation processing IC for image processing, and the LVDS interface device shown in FIG. 5 may be applied to the LVDS interface between the image quality compensation IC and the degradation processing IC as they are.

The image display system according to the embodiment of the present invention can be applied to various electronic devices including a display device. For example, a video camera, a digital camera, a head mounted display (goggle type display), a car navigation system, a projector, a car stereo, a personal computer, a portable information terminal (a mobile computer, a cellular phone or an electronic book, .

As described above, in the data interface device and method according to the present invention, when transmitting RWGB data, RW data is mapped to any one of the color data having the minimum data value of 0 among the RGB data to convert the RWGB data into a three- . In addition, the data interface apparatus and method according to the present invention may further include mode / color information indicating a color having W data among RGB data when the RGB or RWGB data is transmitted, send. Accordingly, the data interface apparatus and method according to the present invention can transmit four-color data using the bandwidth for transmitting three-color data as it is.

Therefore, the image display system using the data interface device and method according to the present invention can transmit data for three colors or four colors in the same format without increasing the data transmission bandwidth, so that cost and EMI increase for data transmission for four colors can be suppressed have.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, Can be carried out within a range. Accordingly, such modifications are deemed to be within the scope of the present invention, and the scope of the present invention should be determined by the following claims.

100: display device 200: host system
10: timing controller 20: data driver
30: gate driver 40: display panel
12: LVDS receiving unit 14: Mode judging unit
16: data conversion unit 18: MUX
210: LVDS transmitter

Claims (12)

(W) data of the four-color data to the three-color transfer format when mapping the four-color data to the three-color transfer format, wherein one of the three-color data and the four- Color data for the three-color data or the four-color mode for the four-color data, and for mapping the W data Color information to indicate the color data mapped to the three-color transmission format, and transmits the three-color transmission format;
And a receiving unit for extracting and outputting the three-color data or the four-color data according to the mode / color information from the three-color transmission format transmitted from the transmitting unit. The method according to claim 1,
The mode / color information is composed of 2 bits indicating first to fourth information values,
If the mode / color information is
Color mode for red (R), green (G), and blue (B) data at the time of the first information value,
A fourth color mode for the R, W, G and B data when the first to fourth information values are any one of the first to fourth information values,
Wherein each of the second to fourth information values indicates a position of one of the color data to which the W data is mapped in the three-color transmission format. The method of claim 2,
The transmission unit maps the 3-color or 4-color data, the mode / color information, and the at least one timing signal to the 3-color transmission format, converts the 3-color or 4-color data into the low voltage differential signal (LVDS) And an LVDS transmitter for outputting a three-color transmission format,
The receiving unit
An LVDS receiver for restoring the 3-color transmission format from the LVDS transmitted from the LVDS transmitter, extracting the 3-color data, the mode / color information, and the timing signal included in the 3-color transmission format,
A mode determination unit for outputting the three-color mode signal or the four-color mode signal using the mode / color information supplied from the LVDS receiving unit,
Color data indicated by the mode / color information among the three-color data supplied from the LVDS receiving unit is converted into the W data when the mode / color information supplied from the LVDS receiving unit indicates the four-color mode A data conversion unit for converting the color data into the minimum value (0) and outputting the four-color data using the remaining two-color data as is,
And a multiplexer for selecting and outputting the three-color data supplied from the LVDS receiving unit or the four-color data supplied from the data converting unit in accordance with the three-color mode signal or the four-color mode signal supplied from the mode determining unit, . The method of claim 3,
The data conversion unit
Color mode information supplied from the LVDS receiving unit indicates the four-color mode, the W data is set to the minimum value (0) if the three-color data supplied from the LVDS receiving unit are identical to each other, And the three-color data is directly applied to output the four-color data. A data interface device according to any one of claims 1 to 4, comprising: a host system including the transmitter for transmitting and receiving the 3-color data or 4-color data in the 3-color transmission format; and a display device And a display unit for displaying the image. The method of claim 5,
The display device
A display panel,
A timing controller including the receiver,
And a panel driver for driving the display panel with the driving timing controlled by the timing controller. The method of claim 6,
Wherein the host system further comprises a data conversion unit for converting the three-color data into the four-color data and outputting the data to the transmission unit,
Wherein the timing controller further comprises a data conversion unit for converting the three-color data output from the receiving unit into the four-color data and outputting the four-color data to the data driver. Color data or 4-color data to a 3-color transmission format, and when mapping the 4-color data to the 3-color transmission format, W data among the 4-color data is mapped to a minimum value 0) to the position of any one of the color data;
Color / mode information indicating the three-color mode for the three-color data or the four-color mode for the four-color data and indicating the color data to which the W data is mapped in the four-color mode, Mapping the signals to the three-color transmission format, respectively,
A transmission step of transmitting the three-color transmission format in which the mapping is completed;
And a receiving step of extracting and outputting the three-color data or the four-color data according to the mode / color information from the transmitted three-color transmission format. The method of claim 8,
The mode / color information is composed of 2 bits indicating first to fourth information values,
If the mode / color information is
The third color mode for R, G, and B data when the first information value is indicated,
A fourth color mode for the R, W, G and B data when the first to fourth information values are any one of the first to fourth information values,
And each of the second to fourth information values indicates a position of one of the color data to which the W data is mapped in the three-color transmission format. The method of claim 9,
The receiving step
Extracting and outputting the three-color data, the mode / color information, and the timing signal included in the three-color transmission format,
Selecting and outputting the three-color data when the mode / color information indicates the three-color mode,
Color information indicated by the mode / color information is converted into the W data when the mode / color information indicates the four-color mode, and the corresponding color data is converted into the minimum value (0) And outputting the four-color data using the remaining two-color data as it is. The method of claim 10,
Wherein when the mode / color information indicates the 4-color mode, the W data is set to the minimum value (0) if the 3-color data are identical to each other, A data interface method for outputting data. A method of driving a video display system that transmits and receives the three-color data or four-color data in the three-color transmission format using the data interface method according to any one of claims 8 to 11.

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