KR20140031017A - Image data transmission device, image data transmission method, and display apparatus applied the method and the device - Google Patents

Abstract

The present invention relates to an image data transmission device, an image data transmission method, and a display apparatus using the method and the device. More particularly, the present invention relates to an image data transmission device which transfers image data to a display device through a driver IC. According to the embodiment of the present invention, the image data transmission device which transfers image data to a display device through a driver IC includes a display part which has pixel columns which include pixels; and a memory part which stores pixel data. [Reference numerals] (300) Data driving part; (410) Signal control part; (411) Memory part; (412) Signal process part; (BB) Pixel data difference; (CC) Image data

Description

Image data transmission device, image data transmission method and display panel device applying the same {Image Data Transmission Device, Image Data Transmission Method, and Display Apparatus Applied the Method and The Device}

The present invention relates to an apparatus, a method for transmitting image data to a display apparatus through a driver IC, and a display apparatus using the same.

In general, in order to display an image on LCD and AMOLED, image data is transmitted to a panel through a driver IC. The data can be divided into a method of directly transmitting pixel data and a method of compressing and restoring pixel data by using a memory.

First, when the pixel data is transmitted as it is, the original pixel data is sent without deformation, so there is no image error. However, when the display panel is driven by high resolution and high speed driving, the transmission speed is slow.

On the other hand, when pixel data is compressed, reconstructed, and transmitted using a memory, the transmission speed may be high when the display panel is driven with high resolution and high speed. However, when restoring the compressed pixel data, an error may occur in the original image data according to the restoration rate, and since the memory is used, the area and the cost of the driver IC are increased.

SUMMARY OF THE INVENTION The present invention has been made to overcome the above-mentioned problems, and aims to reduce the area and production cost of the driver IC by increasing the recovery rate when the compressed data is restored and reducing the memory size inside the driver IC.

The present invention relates to a transmission device for transmitting image data to a display device through a driver IC, comprising: a display unit including a plurality of pixel rows including a plurality of pixels; A memory unit configured to receive raw image data and to store pixel data corresponding to each of the plurality of pixels, wherein the memory unit stores pixel data of a reference pixel and is arranged in a first direction from the reference pixel position Performing a storage operation of sequentially storing differences between adjacent pixel data among pixel data of each of a plurality of pixels in a row, and sequentially storing differences between adjacent pixel data for each of the plurality of pixel rows; For each of the pixel data of the plurality of pixels arranged in the second direction with respect to the reference pixel among the plurality of pixels of each of the pixel rows, the difference between the pixel data of the reference pixel and the adjacent pixel data in the second direction is stored.

In addition, the image data transmission method according to the present invention, receiving the raw image data from the outside; Dividing the raw image data in pixel units and dividing pixel data of a reference pixel from pixel data of other pixels; A storage step of storing the divided pixel data; Storing a difference between adjacent pixel data among the stored pixel data; Restoring pixel data by using a difference between the pixel data of the reference pixel and the adjacent pixel data, wherein the storing of the difference between the adjacent pixel data includes a pixel row arranged in a first direction from the reference pixel position. Sequentially storing a difference between adjacent pixel data among pixel data of each of the plurality of pixels, and sequentially storing a difference between the adjacent pixel data for each of the plurality of pixel rows, and performing the storage operation. For each of the pixel data of the plurality of pixels arranged in the second direction with respect to the reference pixel among the plurality of pixels, the difference between the pixel data of the reference pixel adjacent in the second direction is stored.

In addition, a memory including a plurality of storage areas separated by addresses corresponding to a plurality of pixel arrays of a display unit according to the present invention may store pixel data of a first pixel, and may include a first pixel from the first pixel data and the first pixel. The pixel data difference of the second pixel adjacent in the direction is stored at the corresponding address, and the pixel data difference of the first pixel data and the third pixel adjacent in the second direction from the first pixel are stored at the corresponding address.

In addition, the method of addressing the difference between the pixel data in the memory according to the present invention, (A) generating a difference between the pixel data of the first pixel and the pixel data of the second pixel adjacent to the first pixel, (B) the generation Writing the difference to the address of the memory corresponding to the second pixel, and repeating steps (C) (A) and (B) to repeat two adjacent pixels corresponding to each of the plurality of addresses of the first line of the memory. Writing the differences between the data to a corresponding address, and repeating steps (D) and (C) for another line of the memory.

The image data transmission device, the transmission method, and the display device including the same according to the present invention have an effect of significantly reducing the memory size and manufacturing cost in the display pixel driver IC.

In addition, when the compressed data is restored, the restoration rate is increased and the implementation code is simplified.

In addition, there is an effect that high-speed display and high resolution of the display panel can be implemented.

1 is a plan view of a display device including an image data transmission device according to an exemplary embodiment.
2 is a diagram illustrating a pixel circuit according to an exemplary embodiment of the present invention.
3 is a diagram illustrating a display unit according to an exemplary embodiment.
4 is a diagram illustrating a signal controller according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a memory unit according to an exemplary embodiment of the present invention.
6 is a diagram illustrating data recorded in a storage area according to an embodiment of the present invention.
7 is a diagram illustrating pixel data reconstructed by a signal processor according to an exemplary embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In order to clearly explain the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

According to an embodiment of the present invention, an image data transmission device, an image data transmission method, and a display device employing the same are based on a display (LCD or OLED) having a resolution of (i).

Hereinafter, a display device including an image data transmission device, an image data transmission method, and an image data transmission device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram of a display apparatus including an image data transmission apparatus according to an exemplary embodiment.

As shown in FIG. 1, a display apparatus according to an exemplary embodiment includes a display unit 100, a scan driver 200, a data driver 300, and a controller 400.

The controller 400 receives the row image data RID, the vertical synchronization signal Vsync, and the horizontal synchronization signal Hsync, and generates first and second driving control signals CONT1 and CONT2 and image data.

The controller 400 reads the pixel data and arranges them in the display order to generate image data. The controller 400 generates a first driving control signal CONT1 for controlling timing of supplying image data to the plurality of data lines S1 to Sx according to the vertical synchronization signal Vsync and the horizontal synchronization signal Hsync. The data driver 300 transmits the image data together with the image data.

The data driver 300 samples and holds the input image data according to the first driving control signal CONT1 and transmits a plurality of data signals to each of the plurality of data lines S1 to Sx.

The scan driver 200 generates a plurality of scan signals at a gate-on level according to the second driving control signal CONT2 and transmits them to the plurality of scan lines G1 to Gy.

The controller 400 generates a second driving control signal CONT2 for controlling a time point at which the plurality of scan signals are input to the plurality of scan lines according to the vertical synchronization signal Vsync and the horizontal synchronization signal Hsync.

The display unit 100 includes a plurality of gate lines G1 -Gy arranged in the row direction and a plurality of data lines S1 -Sx arranged in the column direction. The display unit 100 includes a plurality of pixel rows including a plurality of pixels arranged to be connected to each of the gate lines and the data lines.

2 is a diagram illustrating a pixel circuit according to an exemplary embodiment of the present invention.

As shown in FIG. 2, the pixel circuit of the reference pixel P11 includes a switching transistor TS, a driving transistor TR, and a storage capacitor CS. The voltage VSS is connected to the cathode of the organic light emitting diode (OLED).

The switching transistor TS includes a gate electrode connected to the gate signal line G1, a first electrode connected to the data line S1, and a second electrode.

The driving transistor TR includes a gate electrode connected to the second electrode of the switching transistor TS, a source electrode connected to the voltage VDD, and a drain electrode connected to the anode electrode of the organic light emitting diode OLED. Include.

The storage capacitor CS is connected between the gate electrode and the source electrode of the driving transistor TR.

When the switching transistor TS is turned on by the scanning signal of the gate-on voltage transmitted through the gate line G1, the data signal is transmitted to the gate electrode of the driving transistor TR through the data line S1 . The voltage corresponding to the data signal transferred to the gate electrode of the driving transistor TR is held by the storage capacitor CS.

Then, a driving current corresponding to the voltage maintained by the storage capacitor CS flows to the driving transistor TR. This driving current flows through the organic light emitting diode OLED, and the organic light emitting diode OLED emits light with luminance corresponding to the driving current.

3 is a diagram illustrating a display unit according to an exemplary embodiment.

As shown in FIG. 3, the display unit 100 includes a plurality of pixels P (1,1) to P (1, x) in a first direction (for example, a horizontal direction), and a second direction. It comprises a plurality of pixels P (1,1) to P (y, 1) in the vertical direction (for example).

Each of the plurality of pixels P (1, 1) to (P (y, x)) of the display unit 100 is connected to each of the plurality of gate lines G1 to Gy and the source lines S1 to Sx.

Each of the plurality of pixels of the display unit 100 receives a scan signal of a gate-on voltage of the scan driver 200 through a gate wiring, and receives a data signal of the data driver 300 through a source wiring.

For example, the reference pixel P (1, 1) receives the scan signal of the gate-on voltage of the scan driver 200 through the gate line G1, and receives the data signal of the data driver 300 from the source line S1. Received via).

Pixel data of a pixel corresponding to a corresponding address among pixel data of two adjacent pixels is called current pixel data, and remaining pixel data is called immediately preceding pixel data.

4 is a diagram illustrating a signal controller according to an embodiment of the present invention, and FIG. 5 is a diagram illustrating a memory unit according to an embodiment of the present invention.

The signal controller 410 receives the raw image data RID and generates image data. The signal controller 410 includes a memory 411 and a signal processor 412.

The memory unit 411 receives the row image data RID. The memory unit 411 stores the received row image data in pixel units. The memory unit 411 recognizes the pixel data of the reference pixel P (1,1) and differs in the pixel data storage method of the pixel data of the reference pixel P (1,1) and pixels other than the reference pixel (1,1). do.

When the current pixel data is the pixel data I (1,1) of the reference pixel P (1,1), the memory unit 411 does not subtract the pixel data difference between the adjacent pixel data and the current pixel data and does not subtract the pixel data of the reference pixel. Store I (1,1) at the corresponding address.

The memory unit 411 stores two adjacent pixel data for each of a plurality of pixels of a pixel row arranged in a first direction (for example, a horizontal direction) with respect to pixel data of a pixel other than the reference pixel P (1,1). The difference between the two is calculated and stored in the corresponding address sequentially.

 The memory unit 411 stores the pixel data difference at a corresponding address in the same manner as described above for each of the plurality of pixel rows.

The memory unit 411 stores pixel data of the reference pixel P (1,1) for each of pixel data of a plurality of pixels arranged in a second direction (for example, a vertical direction) with respect to the reference pixel P (1,1). The difference between the pixel data adjacent in the second direction from I (1,1) is stored at the corresponding address.

As shown in FIG. 5, the memory unit 411 includes a memory driver 420 and a storage area 424.

The memory driver 420 generates pixel data by dividing the row image data in pixel units, and generates a difference (hereinafter, referred to as a pixel data difference) between pixel data of adjacent pixels and stores the pixel data at a corresponding address in the storage area 424. .

When the memory driver 420 generates the pixel data by dividing the row image data RID in pixel units, the memory driver 420 may identify the pixel positions corresponding to the pixel data. When the current pixel data read from the storage area 424 is the pixel data of the reference pixel, the memory driver 420 may store a corresponding address (eg, (1,1) in the storage area 424 without subtracting the previous pixel data. Record in)).

The memory driver 420 starts to calculate the pixel data difference based on the pixel data I (1,1) of the reference pixel P (1,1).

For example, when the reference pixel is P (1,1) of FIG. 3, the memory driver 420 determines that the pixel data difference between adjacent pixels in the same pixel row is n− in pixel data (current pixel data) of the nth pixel. The pixel data difference (first pixel data) of the first pixel is subtracted to calculate the pixel data difference in the first direction.

The memory driver 420 subtracts pixel data (previous pixel data) of the first pixel of the m−1 th pixel row from the pixel data (current pixel data) of the first pixel of the m th pixel row in the second direction. Calculate the data difference.

The memory driver 420 stores the pixel data difference in the corresponding address of the storage area 424 in the same manner as described above for each of the plurality of pixel rows.

The memory driver 420 stores pixel data of the reference pixel P (1,1) for each of pixel data of a plurality of pixels arranged in a second direction (for example, a vertical direction) with respect to the reference pixel P (1,1). The difference between the pixel data adjacent in the second direction from I (1,1) is stored at the corresponding address in the storage area 424.

Specifically, for example, the memory driver 420 reads the pixel data I (1,1) and the pixel data I (1,2) of the storage area 424 from the storage area 424, and then stores the pixel data I (1, By subtracting 1) and I (1,2), D (1,2), which is the pixel data difference, is generated and stored in the address (1,2) of the storage area 424 as shown in FIG.

The memory driver 420 reads the pixel data I (1,2) of the pixel P (1,2) and the pixel data I (1,3) of the pixel P (1,3) from the storage area 424, and the I ( By subtracting 1,2) and I (1,3), D (1,3), which is the pixel data difference, is generated and stored in the address (1,3) of the storage area 424 as shown in FIG.

The memory driver 420 stores the pixel data I (1, x-1) of the pixel P (1, x-1) and the pixel data I (1, x) of the pixel P (1, x) in the storage area 424. Read, subtract I (1, x-1) and I (1, x-1) to generate the pixel data difference D (1, x), as shown in FIG. 1, x).

Subsequently, when the pixel driver located in the same column direction as the reference pixel is read from the second storage area, the memory driver 420 may differ in pixel data between adjacent pixels in the second row based on I (2,1), which is the pixel data. Is generated and stored in the corresponding address in storage area 424. The method is the same as that of the first pixel row. That is, the pixel data difference D (2,2) is generated by subtracting I (2,2) from the pixel data I (2,1), and stored in the address (2,2) of the storage area 424. The pixel data differences D (2,3) are generated by subtracting I (2,3) from I (2,2) and stored in the addresses (2,3) of the storage area 424.

Subsequently, the memory driver 420 generates a pixel data difference between adjacent pixels in the third row based on I (3,1), which is the pixel data, and stores the pixel data difference in the corresponding address of the storage area 424. The method is the same as that of the first pixel row. That is, the pixel data difference D (3, 2) is generated by subtracting I (3, 2) from the pixel data I (3, 1), and stored in the address (3, 2) of the storage area 424, and the pixel data. The pixel data differences D (3,3) are generated by subtracting I (3,3) from I (3,2) and stored in the addresses (3,3) of the storage area 424.

Subsequently, the memory driver 420 generates a pixel data difference between adjacent pixels in the third row based on I (3,1), which is the pixel data, and stores the pixel data difference in the corresponding address of the storage area 424. The method is the same as that of the first pixel row. That is, the pixel data difference D (3, 2) is generated by subtracting I (3, 2) from the pixel data I (3, 1), and stored in the address (3, 2) of the storage area 424, and the pixel data. The pixel data differences D (3,3) are generated by subtracting I (3,3) from I (3,2) and stored in the addresses (3,3) of the storage area 424.

In this manner, the memory driver 420 may determine a difference between two adjacent pixel data for each of a plurality of pixels of the pixel row arranged in the first direction with respect to pixel data of a pixel other than the reference pixel P (1,1). As shown in FIG. 6, the data is sequentially stored at an address corresponding to the first storage area 424.

The memory driver 420 reads the pixel data I (1,1) from the storage area 424, reads the pixel data I (2,1) from the storage area 424, and then reads the pixel data I (1,1) from the pixel data I (1,1). By subtracting I (2,1), D (2,1), which is the pixel data difference, is generated and stored in the address (2,1) of the storage area 424 as shown in FIG.

The memory driver 420 reads the pixel data I (2,1) of the pixel P (2,1) and the pixel data I (3,1) of the pixel P (3,1) from the storage area 424, and the I ( By subtracting 2,1 and I (3,1), D (3,1), which is the pixel data difference, is generated and stored in the address (3,1) of the storage area 424 as shown in FIG.

The memory driver 420 stores the pixel data I (y-1, 1) of the pixel P (y-1, 1) and the pixel data I (y, 1) of the pixel P (y, 1) in the storage area 424. Read and subtract I (y-1, 1) and I (y, 1) to generate D (y, 1), which is the pixel data difference, and as shown in FIG. 6, the address (y, Save to 1).

In the same manner as described above, the memory driver 420 may perform pixel data I of the reference pixel P (1,1) with respect to the pixel data of the plurality of pixels arranged in the second direction with respect to the reference pixel P (1,1). The difference between the pixel data adjacent in the second direction from 1, 1 is stored in the corresponding address of the storage area 424 as shown in FIG.

The memory driver 420 stores the pixel data difference in the corresponding address of the storage area 424 as shown in FIG. 6 in the same manner as described above for each of the plurality of pixel rows.

Therefore, as illustrated in FIG. 6, the pixel data I (1,1) and the pixel data differences D (1,2) and D (2,1) to D (y, x) correspond to the storage region 424, respectively. It is stored at the address.

As illustrated in FIG. 3, the storage area 424 is addressed according to the pixel arrangement of the display unit 100. The storage area 424 may separately include a storage space in which the pixel data I (1,1) of the reference pixel P (1,1) is always stored.

 The storage area 424 is set to an appropriate capacity for storing current pixel data and immediately preceding pixel data. For example, when pixel data is 8-bit data, the storage area 424 may include 16-bit storage space to include at least two pixel data.

In the storage area 424, pixel data I (1,1) of the reference pixel P (1,1) is stored at the address (1,1), and arranged in a first direction from the reference pixel P (1,1). For each of the plurality of pixels in a row, the difference between the current pixel data and the immediately preceding pixel data is stored at the corresponding address.

In the storage area 424, the pixel data of the reference pixel P (1,1) for the pixel data of the plurality of pixels arranged in the second direction (for example, the vertical direction) with respect to the reference pixel P (1,1). The difference between the pixel data adjacent in the second direction from I (1,1) is stored at the corresponding address.

The pixel data difference D (1,2), which is the difference between the pixel data I (1,1) and the pixel data I (1,2), is located at the address (1,2) of the storage area 424 as shown in FIG. Stored. The pixel data difference D (1,3) of the pixel data I (1,2) and the pixel data I (1,3) is stored at the address (1,3). Therefore, as illustrated in FIG. 6, the pixel data difference D (1, x) between the pixel data I (1, x-1) and the pixel data I (1, x) is stored at the address (1, x).

 D (2,1), which is the pixel data difference between the pixel data I (1,1) and the pixel data I (2,1), is stored in the storage area 424 address (2,1) as shown in FIG. . The pixel data difference D (1,2), which is the difference between the pixel data I (1,1) and the pixel data I (1,2), is stored at the address (1,2) of the storage area 424 as shown in FIG. Stored. The pixel data difference D (2,2) of the pixel data I (2,1) and the pixel data I (2,2) is stored at the address (2,2).

Therefore, as shown in Fig. 6, the pixel data difference D (2, x) between the pixel data I (2, x-1) and the pixel data I (2, x) is stored at the address (2, x).

In this manner, pixel data differences are sequentially stored in the first direction for each of the plurality of pixel rows as shown in FIG. 6 at an address corresponding to the storage area 424.

D (y, 1), which is the pixel data difference between the pixel data I (y-1,1) and the pixel data I (y, 1), is stored in the storage area 424 address (y, 1) as shown in FIG. Stored. The pixel data difference D (y, 2), which is the difference between the pixel data I (y, 1) and the pixel data I (y, 2), is located at the address (y, 2) of the storage area 424 as shown in FIG. Stored.

The pixel data difference D (y, 3) of the pixel data I (y, 2) and the pixel data I (y, 3) is stored at the address (y, 3). Therefore, as shown in FIG. 6, the pixel data difference D (y, x) between the pixel data I (y, x-1) and the pixel data I (y, x) is stored at the address (y, x).

Thus, as shown in FIG. 6, pixel data differences between adjacent pixels of all pixels are stored at corresponding addresses in the storage area 424.

The signal processor 412 restores the pixel data compressed and stored in the memory 411. The signal processor 412 needs to process the pixel data by one frame to generate image data. For example, when the driving current amount according to the pixel data of one frame is high, image data processing for limiting the driving current amount may be performed.

That is, the memory controller 411 may be included in the signal controller 412 to store pixel data input while the signal processor 412 performs image processing.

The signal processor 412 may include the difference D (1,2) through the pixel data of two adjacent pixels arranged in a first direction or a second direction with respect to I (1,1) stored in the storage area 424. The pixel data I (1,2), I (2,1) to I (y, x) of each of the plurality of pixels is restored using D (x, y).

The signal processor 412 restores pixel data of each of the plurality of pixels of the first pixel row arranged in the first direction from the position of the reference pixel P (1,1). The signal processor 412 reads the pixel data I (1.1) and the pixel data difference D (1,2) stored in the storage area 424, and adds D (1,2) to I (1,1) in FIG. As shown, the pixel data I (1,2) of P (1,2) is restored.

The signal processor 412 reads the reconstructed pixel data I (1.2) and the pixel data difference D (1,3) stored in the storage area 424, and adds D (1,3) to I (1,2). As shown in Fig. 7, the pixel data I (1,3) of P (1,3) is restored.

The signal processor 412 reads the reconstructed pixel data I (1.x-1) and the pixel data difference D (1, x) stored in the storage area 424, and D (1) at I (1, x-1). x is added to restore the pixel data I (1, x) of P (1, x) as shown in FIG.

Subsequently, the signal processor 412 restores the pixel data of the second row based on I (2,1), which is the pixel data. The method is the same as that of the first pixel row. That is, the pixel data I (2,2) is added to the pixel data I (2,1) to restore the pixel data I (2,2), and the pixel data I (2,2) is added to the pixel data by adding the D (2,3). Restore I (2,3).

Subsequently, the signal processor 412 restores the pixel data of the third row based on I (3,1), which is the pixel data. The method is the same as that of the first pixel row. That is, the pixel data I (3,2) is added to the pixel data I (3,1) to restore the pixel data I (3,2), and the pixel data I (3,2) is added to the pixel data I (3,2). Restore I (3,3).

In this manner, the signal processing unit 412 restores the pixel data I (2, n) by adding D (2, n) to the pixel data I (2, n-1).

The signal processor 412 restores the pixel data of each of the plurality of pixels of the pixel row arranged in the second direction from the position of the reference pixel P (1,1). The signal processor 412 reads the pixel data I (1.1) and the pixel data difference D (2,1) stored in the storage area 424, and adds D (2,1) to I (1,1) in FIG. As shown, the pixel data I (2,1) of P (2,1) is restored.

The signal processor 412 reads the reconstructed pixel data I (2,1) and the pixel data difference D (3,1) stored in the storage area 424, and adds D (3,1) to I (2,1). In addition, as shown in FIG. 7, the pixel data I (3,1) of P (3,1) is restored.

The signal processor 412 reads the reconstructed pixel data I (y-1. 1) and the pixel data difference D (y, 1) stored in the storage area 424, and D (y) at I (y-1, 1). And 1) are added to restore the pixel data I (y, 1) of P (y, 1) as shown in FIG.

In this manner, the signal processing unit 412 corresponds to each pixel as illustrated in FIG. Restore to the address.

Therefore, as shown in FIG. 7, the pixel data I (1,2), I (2,1) to I (y, x) are respectively restored to corresponding addresses.

The signal processing unit 412 adds the pixel data difference D (a + 1, 1) to the first pixel data I (a, 1) in row a and adds the first pixel data I (a + 1, 1) in the a + 1th row. ) Is restored, and the pixel data I (a + 1, n) is restored by adding the pixel data difference D (a + 1, n) to the n-1th pixel data of the a + 1th row. At this time, n is a natural number of 2 or more.

6 is a diagram illustrating data recorded in the storage area 424 according to an exemplary embodiment.

According to Fig. 6, the storage area 424 has an address of (X x Y).

The storage area 424 stores the difference of pixel data between two adjacent pixels other than the pixel data I (1,1) and the pixel data I (1,1) of the reference pixel P (1,1) on a row basis. .

For example, in the first row, I (1,1), which is the pixel data of the reference pixel P (1,1), is stored at the address (1,1), and the pixel data I (1,1) and I (1,1). Pixel data difference D (1,2), which is the difference between 2) In the address (1,3), the pixel data difference D (1, x) of the pixel data I (1, x-1) and I (1, x) is stored in the address (1, x).

In the second row, the pixel data difference D (2,2), which is the difference between the pixel data I (2,1) and I (2,2), is stored at the address (2,2), and the pixel data I (2,2) Pixel data difference D (2,3), which is the difference between and I (2,3), is stored at address (2,3), ..., pixel data I (2, x-1) and I (2, x) D (2, x), which is a difference between the two, is stored at the address (2, x).

In this manner, the difference between the pixel data of the current pixel and the pixel data of the immediately preceding pixel for the plurality of pixel rows of the display unit is stored at an address corresponding to the current pixel of each row.

In the yth row, the pixel data difference D (y, 2), which is the difference between the pixel data I (y, 1) and I (y, 2), is stored at the address (y, 2), and the pixel data I (y, 2) The pixel data difference D (y, 3), which is the difference between and I (y, 3), is stored at the address (y, 3), and the pixel data I (y, x-1) and I (y, x). The pixel data difference D (y, x), which is a difference of?, Is stored at the address (y, x).

7 is a diagram illustrating pixel data reconstructed by a signal processor according to an exemplary embodiment.

The detailed method of restoring the pixel data in the signal processor 412 is the same as described above, and thus will be omitted.

For the pixel data of pixels other than the reference pixel P (1,1), the difference between two pixel data adjacent to the pixel data of the reconstructed pixel is added to each of a plurality of pixels of the first pixel row arranged in the first direction. It is restored as shown in FIG.

The difference between two pixel data adjacent to the pixel data of the reconstructed pixel is reconstructed as shown in FIG. 7 for each of the plurality of pixels of the second to y pixel rows arranged in the first direction in the same manner.

Therefore, pixel data I (1,2) except for I (1,1), I (2,1) to I (x, y) is restored as shown in FIG.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, , Changes, deletions, additions, and so forth, other embodiments may be easily suggested, but these are also within the scope of the present invention.

Claims (12)

A display unit including a plurality of pixel rows including a plurality of pixels; And
A memory unit configured to receive raw image data and store pixel data corresponding to each of the plurality of pixels,
The memory unit stores pixel data of a reference pixel, sequentially stores a difference between adjacent pixel data among pixel data of each of a plurality of pixels arranged in a first direction from the reference pixel position,
Sequentially storing differences between adjacent pixel data for each of the plurality of pixel rows;
A display device which stores a difference between pixel data adjacent to each other in the second direction from the reference pixel with respect to each of pixel data of a plurality of pixels arranged in a second direction with respect to a reference pixel among a plurality of pixels of each of the plurality of pixel rows. . The method of claim 1, wherein the memory unit,
A storage area separated by an address corresponding to each of the plurality of pixels,
In the storage area,
The pixel data of the reference pixel is stored at a corresponding address, and the difference between two adjacent pixel data among a plurality of pixels of a first pixel row arranged in the first direction from the reference pixel position is sequentially stored at a corresponding address. And, in the second pixel row adjacent to the first pixel row, a pixel data difference between pixel data of the first pixel adjacent to the second direction from the reference pixel position and pixel data of the reference pixel corresponds to the second pixel row. Stored in a first address among a plurality of addresses, and pixel data differences between two adjacent pixels among a plurality of pixels in a second pixel row arranged in the first direction from the first pixel position are sequentially stored in corresponding addresses. Video data transmission device. 3. The method of claim 2,
In the storage area,
The difference between the pixel data of the first pixel of the a + 1th pixel row adjacent to the a + th pixel row and the pixel data of the first pixel of the ath pixel row is one of a plurality of addresses corresponding to the a + 1th pixel row. The pixel data difference between two adjacent pixels among the plurality of pixels of the a + 1 pixel row stored in the first address and arranged in the first direction from the first pixel position of the a + 1 pixel row sequentially corresponds to each other. Stored at the address,
And a is a natural number of two or more. The method according to claim 1,
Sequentially reconstruct pixel data by using a difference between pixel data of the reference pixel and adjacent pixel data among pixel data of each of a plurality of pixels of a pixel row arranged in a first direction from the reference pixel position;
Performing pixel data restoration on each of the plurality of pixel rows;
Pixel data of the reference pixel and pixel data of a plurality of pixels arranged in a second direction with respect to a reference pixel among a plurality of pixels of each of the plurality of pixel rows, respectively, from the pixel data of the reference pixel in a second direction. And a signal processor that sequentially restores pixel data by using a difference between adjacent pixel data. Receiving raw image data from the outside;
Dividing the raw image data in pixel units and dividing pixel data of a reference pixel from pixel data of other pixels;
A storage step of storing the divided pixel data;
Storing a difference between adjacent pixel data among the stored pixel data;
Restoring pixel data by using a difference between the pixel data of the reference pixel and the adjacent pixel data;
The step of storing the difference between the adjacent pixel data,
Sequentially storing a difference between adjacent pixel data among pixel data of each of a plurality of pixels of a pixel row arranged in a first direction from the reference pixel position,
Sequentially storing the difference between the adjacent pixel data for each of the plurality of pixel rows;
For each of the pixel data of a plurality of pixels arranged in a second direction with respect to a reference pixel among a plurality of pixels of each of the plurality of pixel rows, a difference between pixel data adjacent to the second direction from the pixel data of the reference pixel is stored. Video data transmission method. 6. The method of claim 5,
Storing the difference between the adjacent pixel data,
Storing pixel data of the reference pixel at a corresponding address in a storage area,
A difference between pixel data of adjacent pixels among the pixel data of each of the plurality of pixels of the pixel row arranged in the first direction from the reference pixel position is sequentially stored at a corresponding address in the storage area,
For each of the plurality of pixel rows, the difference between the adjacent pixel data is sequentially stored at each corresponding address in the storage area,
A storage area for the difference between the pixel data of the plurality of pixels arranged in the second direction of the plurality of pixels of each of the plurality of pixel rows in the second direction from the pixel data of the reference pixel and adjacent pixel data in the second direction. And storing the data at an address corresponding to the image data. A memory including a plurality of storage regions separated by addresses corresponding to a plurality of pixel arrays of a display unit,
Pixel data of the first pixel is stored,
A difference between the first pixel data and pixel data of a second pixel adjacent in a first direction from the first pixel is stored at a corresponding address,
A memory stored at an address corresponding to a difference between the first pixel data and pixel data of a third pixel adjacent in a second direction from the first pixel. The method of claim 7, wherein
The corresponding address is
A memory that is an address of the memory corresponding to a second or third pixel. The method of claim 7, wherein
And the first pixel is a pixel at a reference position (1,1). In the method of addressing the difference between the pixel data to the memory,
(A) generating a difference between the pixel data of the first pixel and the pixel data of the second pixel adjacent in the first direction to the first pixel;
(B) storing the generated difference at an address of the memory corresponding to the second pixel;
(C) repeating steps (A) and (B) to store differences between two adjacent pixel data corresponding to each of a plurality of addresses in the first row of the memory at corresponding addresses; And
(D) repeating step (C) for the other row of the memory. The method of claim 10, wherein step (A) is
And storing the pixel data of the first pixel at the reference address when the pixel data of the first pixel corresponds to the reference address of the memory. 11. The method of claim 10,
(E) generating a difference between the pixel data corresponding to the first address of the first row and the pixel data corresponding to the first address of the second row;
(F) storing the difference between the pixel data generated in step (E) at the first address of the second row; And
(G) repeating steps (E) and (F) to store pixel data differences of pixels adjacent in the second direction and the first pixel in each row of the memory at a corresponding address. .

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