CN100399414C - Drive chip for converting strip-shaped image data into triangular image data and display - Google Patents

Abstract

The driving chip of the central processor interface is combined with the liquid crystal display panel arranged in a triangular mode to be applied to a display, the central processor interface of the driving chip receives image data arranged in a strip mode, the image conversion device of the driving chip converts the image data arranged in the strip mode into the image data arranged in the triangular mode firstly, and then the image data arranged in the triangular mode is stored in a memory of the driving chip. Finally, the digital/analog converter of the driving chip converts the image data arranged in the triangular mode into analog image data to be output to a display panel arranged in the triangular mode. Storing the image data in the delta arrangement instead of storing the image data in the bar arrangement significantly saves memory space.

Description

Driver chip and display for converting strip image data into triangular image data

technical field

The invention relates to a driving chip and a display using it, in particular to a display capable of converting strip-arranged image data into triangular-arranged image data.

Background technique

The central processing unit interface (CPU I/F) is most commonly used in mobile phones. Since the LCD panel of the mobile phone does not need to be updated frequently, the system only needs to send image data to the driver IC once when the screen needs to be updated. ), and the driver chip has a memory (memory) inside to store the image data sent by the system, so the driver chip of the central processing unit interface can continuously read out the image data and display the image on the liquid crystal display panel.

Another common interface is the RGB interface (RGB I/F), which is mainly used in digital cameras (digital camera, DC), digital video cameras (digital video, DV), personal digital assistants (personal digital assistant, PDA) and other electronic products. The liquid crystal display panel of this kind of electronic product needs to update the picture frequently, and its update speed is as high as more than 50 times per second, so the system needs to continuously transmit image data to the driver chip, even if it is a still picture, the image data must be continuously transmitted, so RGB The driver chip of the interface does not need to have memory design.

Please refer to FIG. 1; FIG. 1 is a schematic diagram of a driver chip 1 of a CPU interface 10 in the prior art. The driver chip 1 includes a CPU interface 10, a memory 20, a digital/analog converter (digital-to-analog converter) 18, a clock generator (timing generator) 16, a memory controller (memory controller) 14 And a command decoder (commanddecoder) 12. The CPU interface 10 receives image data and other control signals from the system, the image data will be stored in the memory 20, and the digital/analog converter 18 accesses the image data inside the memory 20 and converts it into analog image data, Finally, it is output to a liquid crystal display panel. Other control signals are used to control the operation of the driving chip 1 after being decoded by the instruction decoder 12 . The clock generator 16 generates the clock needed to drive the chip 1 to operate, and the memory controller 14 controls the access of the memory 20 .

Most of the liquid crystal display panels of mobile phones use panels arranged in stripes, please refer to Figure 2; Figure 2 is a schematic diagram of RGB display panels 2 arranged in stripes. , B sub-pixels are aligned up and down, R is aligned with R, G is aligned with G, and B is aligned with B.

Taking the driver chip 1 in FIG. 1 and the RGB display panel 2 arranged in strips in FIG. 2 as an example, the resolution of the early panel is 128*3*128, and each of R, G, and B has 4-bit (bit) grayscale, so the memory 20 requires a memory capacity of 128*3*128*4 bits (about 192K bits). However, the functions of mobile phones are constantly being introduced, such as digital cameras with megapixels, watching videos, etc., and the requirements for image quality are also further improved. At present, the display panel of the mobile phone mostly adopts QVGA resolution 320*3*240, R, G, B each 6-bit gray scale, so the capacity of the memory 20 needs to be increased to 320*3*240*6 bits (about 1380K bits), about seven times larger. Therefore, how to reduce the capacity of the memory 20 in the driver chip 1 of the CPU interface 10 and still maintain a good image visual effect has become another subject.

Contents of the invention

The invention discloses a display, which is used for converting image data arranged in stripes into image data arranged in triangles. The display includes a display panel, a plurality of pixel units, a plurality of signal lines and at least one driving chip electrically connected to the plurality of signal lines. The display panel includes a substrate, the substrate includes an active area and at least one peripheral area, and the peripheral area is adjacent to the active area. The plurality of pixel units are arranged in a triangular form in the active area of the substrate, and the plurality of signal lines are arranged in the active area and the peripheral area, and are electrically connected with the plurality of pixel units. The driving chip includes at least one CPU interface, at least one first image converting device, at least one memory and at least one digital/analog converter. The central processing unit interface is used to receive the image data arranged in strips, and the first image conversion device is coupled to the central processing unit interface to convert the striped image data received by the central processing unit interface. Image data arranged in a triangular form, the memory is coupled to the first image conversion device for storing the image data in a triangular arrangement from the first image conversion device, the digital/analog converter is coupled to the memory , to convert the triangular image data into analog image data.

Description of drawings

FIG. 1 is a schematic diagram of a driver chip for a CPU interface in the prior art.

FIG. 2 is a schematic diagram of an RGB display panel arranged in strips.

FIG. 3 is a schematic diagram of the driver chip of the central processing unit interface of the present invention.

FIG. 4 is a schematic diagram of a triangular arrangement of RGB display panels.

FIG. 5 and FIG. 6 are schematic diagrams of a driver chip interfaced with a central processing unit in other embodiments of the present invention.

FIG. 7 is a schematic diagram of the driver chip of FIG. 3 disposed on the display panel of FIG. 4 .

FIG. 8 is a schematic diagram of the driver chip of FIG. 3 disposed on a circuit board.

Description of reference symbols

7 substrate 8 circuit board

10 Central Processing Unit Interface 12 Instruction Decoder

14 memory controller 16 clock generator

18 Digital/Analog Converter 42 Active Areas

44 peripheral areas 71 scan lines

72 scan line signal output circuit 73 data line

74 data line signal output circuit

2, 4 display panel

34, 54 second image conversion device

321, 541 first sub-image conversion device

322, 542 second sub-image conversion device

32, 52, 62 first image conversion device

1, 3, 5, 6 driver chips

20, 30, 50, 60 memory

Detailed ways

In the prior art, the mobile phone display panel usually adopts QVGA resolution 320*3*240, R, G, B each 6-bit grayscale, and is equipped with an RGB display panel arranged in strips, so it needs 320*3*240*6 bits (about 1380K bits) of memory capacity. However, the present invention adopts a panel resolution of 640*240, and is equipped with an RGB display panel arranged in a triangle, and accepts the image format of QVGA. Save memory space and still maintain a good image visual effect. Details are given below.

Please refer to FIG. 3; FIG. 3 is a schematic diagram of the driver chip 3 of the CPU interface 10 of the present invention. The driver chip 3 includes at least one CPU interface 10, at least one memory 30, at least one digital/analog converter 18, at least one clock generator 16, at least one memory controller 14, at least one instruction decoder 12, at least one first An image conversion device 32 and at least one second image conversion device 34 , wherein the first image conversion device 32 includes at least one first sub-image conversion device 321 and at least one second sub-image conversion device 322 .

FIG. 4 is a schematic diagram of a delta-arranged RGB display panel 4 with a resolution of 640*240. This type of display panel 4 has been widely used in digital cameras and digital video cameras. The so-called triangular arrangement, for example, assume that the sub-pixels in the previous column are arranged as RGBRGB...the next column is GBRGBR...and the second sub-pixel B in the next column is between the first sub-pixel R and the first sub-pixel in the previous column. Between the two sub-pixels G, that is, the upper and lower columns of adjacent R, G, and B sub-pixels are arranged in the form of a regular triangle and an inverted triangle. The display panel 4 arranged in a triangle is characterized in that the resolution of the panel is relatively low, but there is still a good visual effect when viewing pictures. When displaying fine text, there will be some jagged edges. However, mobile phone users do not require high text resolution, as long as the text can be clearly distinguished.

The technical content of the present invention will be described by taking the driving chip 3 in FIG. 3 and the RGB display panel 4 arranged in a triangle in FIG. 4 as examples. The CPU interface 10 receives image data and other control signals from the system. The image data is RGB image data arranged in strips. The first sub-image conversion device 321 of the first image conversion device 32 converts the RGB image data arranged in strips. The image data is converted into triangular RGB image data, and the original image data size is reduced from 320*3*240*6 bits (about 1380K bits) to 640*240*6 bits (about 922K bits), which can save about 33% The capacity of the memory 30. Next, the second sub-image conversion device 322 of the first image conversion device 32 converts the RGB image data arranged in a triangular form into YUV image data arranged in a triangular form, so that the image data can be reduced to 640/6*240*(6* 2+6+6) bits (about 622K bits), and then store the triangular YUV image data in the memory 30, so the memory capacity of the memory 30 of the driver chip 3 in FIG. 3 can be reduced by converting the image data. Since it is applied to the RGB display panel 4 of the triangular arrangement in FIG. Input to the digital/analog converter 18 , the digital/analog converter 18 converts the triangular-arranged RGB image data into analog image data, and finally outputs to the triangular-arranged RGB display panel 4 . In this embodiment, the memory capacity of the memory 30 is reduced by converting the image data arranged in rows into triangles, and then converting the RGB format into the YUV format, which can reduce the memory capacity by nearly 50%.

The variation of the above-mentioned embodiment is: the first sub-image converting device 321 of the first image converting device 32 converts the striped RGB image data into the striped YUV image data, and the size of the original image data changes from 320*3 *240*6 bits (1380K bits) are reduced to 320*3/6*240*(6*2+6+6) bits (about 920K bits), which can save about 33% of the memory 30 capacity. Next, the second sub-image conversion device 322 of the first image conversion device 32 converts the YUV image data arranged in strips into YUV image data arranged in a triangle, so that the image data can be reduced to 640/6*240*(6 *2+6+6) bits (approximately 622K bits), and then store the YUV image data arranged in a triangle in the memory 30, so the memory capacity of the memory 30 of the drive chip 3 in FIG. 3 can be reduced by converting the image data . The second image conversion device 34 reads out the YUV image data of the triangular arrangement in the memory 30, and converts it back to the RGB image data of the triangular arrangement, and then inputs it to the digital/analog converter 18, and the digital/analog converter 18 will The triangular-arranged RGB image data is converted into analog image data, and finally output to the triangular-arranged RGB display panel 4 . In this embodiment, the storage capacity of the memory 30 is reduced by converting the RGB format into the YUV format first, and then converting the image data arranged in rows into image data arranged in a triangle, which can reduce the memory capacity by nearly 50%.

Please refer to FIG. 5; FIG. 5 is a schematic diagram of a driver chip 5 for a CPU interface according to another embodiment of the present invention. The driver chip 5 includes at least one CPU interface 10, at least one memory 50, at least one digital/analog converter 18, at least one clock generator 16, at least one memory controller 14, at least one instruction decoder 12, at least one first An image conversion device 52 and at least one second image conversion device 54 , wherein the second image conversion device 54 includes at least one first sub-image conversion device 541 and at least one second sub-image conversion device 542 .

Take the driver chip 5 in FIG. 5 and the RGB display panel 4 arranged in a triangle in FIG. 4 as examples. The central processing unit interface 10 receives image data and other control signals from the system. The image data is RGB image data arranged in strips, and the first image conversion device 52 converts the RGB image data arranged in strips into strips. YUV image data, the original image data size is reduced from 320*3*240*6 bits (about 1380K bits) to 320*3/6*240*(6*2+6+6) bits (about 920K bits). The YUV image data arranged in stripes is first stored in the memory 50 . Next, the first sub-image conversion device 541 of the second image conversion device 54 converts the YUV image data arranged in strips back to the RGB image data arranged in strips, and then the second sub-image conversion by the second image conversion device 54 The device 542 converts the strip-arranged RGB image data into triangular-arranged RGB image data, and then inputs it to the digital/analog converter 18, and the digital/analog converter 18 converts the triangular-arranged RGB image data into an analog image The data is finally output to the RGB display panel 4 arranged in a triangle. In this embodiment, the storage capacity of the memory 50 is reduced by converting the RGB format into the YUV format, which can reduce the storage capacity by nearly 33%.

Please refer to FIG. 6; FIG. 6 is a schematic diagram of a driver chip 6 for a CPU interface according to another embodiment of the present invention. The driver chip 6 includes at least one CPU interface 10, at least one memory 60, at least one digital/analog converter 18, at least one clock generator 16, at least one memory controller 14, at least one instruction decoder 12 and at least one first An image conversion device 62 .

Take the driving chip 6 in FIG. 6 and the RGB display panel 4 arranged in a triangle in FIG. 4 as an example. After the first image conversion device 62 converts the strip-arranged RGB image data into triangular-arranged RGB image data, the triangular-arranged RGB image data can be stored in the memory 60 without performing YUV format conversion on it, The original image data size is reduced from 320*3*240*6 bits (about 1380K bits) to 640*240*6 bits (about 922K bits), which can save about 33% of the capacity of the memory 60 . Next, the digital/analog converter 18 directly obtains the triangular RGB image data from the memory 60 and converts it into analog image data. In this embodiment, the memory capacity of the memory 60 is reduced only by converting the image data arranged in columns and columns into image data arranged in triangles, which can reduce the memory capacity by nearly 33%.

In addition, when the drive chips 3, 5, and 6 of the present invention perform image processing on image data, different compression methods can be set for different areas through control signals sent from the system, or some areas are compressed and some areas are not compressed, so as to meet different requirements. screen application. For example, the image compression method can be used for the image area, while the text area is not compressed, but the number of gray levels is less, so as to fit the text screen.

In the present invention, the display panel 4 arranged in a triangular form with a lower resolution is combined with the drive chips 3, 5, and 6 of the central processing unit interface 10 to perform image conversion on the image data before storing the image data in the memory 30, 50, and 60. , to reduce the image data size. In addition, the triangular display panel 4 of the present invention can be a three-color display panel or a four-color display panel, such as red, green, blue (RGB) or yellow purple indigo (YMC) etc.; (RGBW) or red-green-blue-indigo (RGBC), etc., in which white can be replaced by a mixture of three primary colors and non-three primary colors, such as: RGBY or RGC, etc., so the way of image data conversion is different with the matching display panel.

The driver chips 3 , 5 , 6 of the present invention can be arranged on the display panel 4 or on a circuit board. Please refer to FIG. 7 ; FIG. 7 is a schematic diagram of the driver chip 3 of FIG. 3 disposed on the display panel 4 of FIG. 4 . The display panel 4 includes a substrate 7 , the substrate 7 includes an active area 42 and at least one peripheral area 44 , and the peripheral area 44 is adjacent to the active area 42 . The sub-pixels in FIG. 4 are arranged in a triangular arrangement on the active region 42 corresponding to the substrate 7 . A scan line (scan line) signal output circuit 72, a data line (data line) signal output circuit 74 and the driver chip 3 are provided on the substrate 7, wherein the scan line signal output circuit 72, the data line signal output circuit 74 and the driver chip 3 It cannot be fabricated on the substrate 7 directly, and usually is laminated on the substrate 7 by means of chip on glass (COG) and other packaging methods. A plurality of scanning lines 71 are arranged in the active region 42 and the peripheral region 44, for electrically connecting the scanning line signal output circuit 72 and the pixel unit in FIG. 4; a plurality of data lines 73 are arranged in the active region 42 and the peripheral region 44, for The data line signal output circuit 74 is electrically connected to the pixel unit in FIG. 4 . The scan line signal output circuit 72 and the data line signal output circuit 74 display images on the active area 42 according to the control signal and image data of the driving chip 3 .

FIG. 8 is a schematic diagram of the driver chip 3 of FIG. 3 disposed on at least one circuit board 8 . The difference between FIG. 8 and FIG. 7 lies in the location of the driver chip 3 . The drive chip 3 is arranged on the circuit board 8, the circuit board 8 is located on one side of the peripheral area 44, and is far away from the active area 42, and is electrically connected to the scanning line signal output circuit 72 and the data line signal output circuit 74, and other components are arranged in the same manner. It is the same as that in FIG. 7 , and will not be repeated here. The circuit board 8 in FIG. 8 can be a printed circuit board (printed circuit board) or a flexible circuit board (flexible printed circuit board). The display panel 4 may be a liquid crystal display panel (liquid crystal display, LCD) or an organic electroluminescent display panel (organic electroluminescent display, OELD) of an α-Si process or a low temperature polysilicon (LTPS) process, wherein the organic electroluminescent display panel The display panel includes an organic light emitting diode (OLED) display panel and an organic polymer light emitting diode (PLED) display panel.

The present invention provides a central processor interface display that can convert image data arranged in columns and columns into image data arranged in triangles. The present invention combines the drive chip of the central processor interface with the liquid crystal display panel arranged in triangles. In order to save the memory space by storing the image data arranged in a triangular form or storing the compressed image data while still maintaining a good visual effect of the image, the size of the image data is reduced by converting the image data.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Claims (18)

1. the image data that the strip formula can be arranged convert the display of the image data that trigonometric expression arranges to, comprises:

One display panel comprises a substrate, and this substrate comprises an active area and at least one neighboring area, and this neighboring area and this active area adjacency;

A plurality of pixel cells are arranged in trigonometric expression in the active area of this substrate;

Many signal line are arranged at this active area and this neighboring area, and are electrically connected with these a plurality of pixel cells; And

At least one chip for driving is electrically connected on this many signal line, and this chip for driving comprises:

At least one central processing unit interface is in order to receive the image data that the strip formula is arranged;

At least one first video conversion device is coupled to this central processing unit interface, and the image data of arranging in order to the strip formula that this central processing unit interface is received converts the image data that trigonometric expression is arranged to;

At least one storer is coupled to this first video conversion device, in order to store the image data that trigonometric expression that this first video conversion device transmits is arranged; And

At least one digital/analog converter is coupled to this storer, converts the analog image data in order to the image data that trigonometric expression is arranged.

2. display as claimed in claim 1, wherein this first video conversion device comprises one first sub-image conversion equipment and one second sub-image conversion equipment, first image data that this first sub-image conversion equipment is arranged in order to the strip formula that this central processing unit interface is received converts first image data that trigonometric expression is arranged to, and this second sub-image conversion equipment converts second image data that a trigonometric expression is arranged in order to first image data that this trigonometric expression is arranged.

3. display as claimed in claim 2, wherein this chip for driving also comprises at least one second video conversion device, be coupled between this storer and this digital/analog converter, second image data of arranging in order to the trigonometric expression that will be stored in this storer converts first image data that this trigonometric expression is arranged to.

4. display as claimed in claim 1, wherein this first video conversion device comprises one first sub-image conversion equipment and one second sub-image conversion equipment, first image data that this first sub-image conversion equipment is arranged in order to the strip formula that this central processing unit interface is received converts second image data that the strip formula is arranged to, and this second sub-image conversion equipment converts second image data that a trigonometric expression is arranged in order to second image data that this strip formula is arranged.

5. display as claimed in claim 4, wherein this chip for driving also comprises at least one second video conversion device, be coupled between this storer and this digital/analog converter, second image data of arranging in order to the trigonometric expression that will be stored in this storer converts first image data that this trigonometric expression is arranged to.

6. display as claimed in claim 1, wherein this chip for driving is arranged at this neighboring area.

7. display as claimed in claim 1 also comprises at least one circuit board, is arranged at an end of this neighboring area, and away from this active area, this chip for driving is arranged on this circuit board.

8. the image data that the strip formula can be arranged convert the display of the image data that trigonometric expression arranges to, comprises:

One display panel comprises a substrate, and this substrate comprises an active area and at least one neighboring area, and this neighboring area and this active area adjacency;

A plurality of pixel cells are arranged in trigonometric expression in the active area of this substrate;

Many signal line are arranged at this active area and this neighboring area, and are electrically connected with these a plurality of pixel cells; And

At least one chip for driving is electrically connected on this many signal line, and this chip for driving comprises:

At least one central processing unit interface is in order to receive the image data that the strip formula is arranged;

At least one first video conversion device is coupled to this central processing unit interface, and first image data of arranging in order to the strip formula that this central processing unit interface is received converts second image data that a strip formula is arranged to;

At least one storer is coupled to this first video conversion device, in order to store second image data that strip formula that this first video conversion device transmits is arranged;

At least one second video conversion device is coupled to this storer, converts first image data that a trigonometric expression is arranged in order to second image data that the strip formula is arranged; And

At least one digital/analog converter is coupled to this second video conversion device, converts the analog image data in order to the image data that trigonometric expression is arranged.

9. display as claimed in claim 8, wherein this second video conversion device comprises one first sub-image conversion equipment and one second sub-image conversion equipment, this first sub-image conversion equipment converts first image data that this strip formula is arranged in order to second image data that the strip formula is arranged, and this second sub-image conversion equipment converts first image data that this trigonometric expression is arranged in order to first image data that this strip formula is arranged.

10. display as claimed in claim 8, wherein this chip for driving is arranged at this neighboring area.

11. display as claimed in claim 8 also comprises at least one circuit board, is arranged at an end of this neighboring area, and away from this active area, this chip for driving is arranged on this circuit board.

12. a chip for driving is used for converting the image data that the strip formula is arranged to image data that trigonometric expression is arranged, this chip for driving comprises:

At least one central processing unit interface is in order to receive the image data that the strip formula is arranged;

At least one first video conversion device is coupled to this central processing unit interface, and the image data of arranging in order to the strip formula that this central processing unit interface is received converts the image data that trigonometric expression is arranged to;

At least one storer is coupled to this first video conversion device, in order to store the image data that trigonometric expression that this first video conversion device transmits is arranged; And

At least one digital/analog converter is coupled to this storer, converts the analog image data in order to the image data that trigonometric expression is arranged.

13. chip for driving as claimed in claim 12, wherein this first video conversion device comprises one first sub-image conversion equipment and one second sub-image conversion equipment, first image data that this first sub-image conversion equipment is arranged in order to the strip formula that this central processing unit interface is received converts first image data that trigonometric expression is arranged to, and this second sub-image conversion equipment converts second image data that a trigonometric expression is arranged in order to first image data that this trigonometric expression is arranged.

14. chip for driving as claimed in claim 13, also comprise at least one second video conversion device, be coupled between this storer and this digital/analog converter, second image data of arranging in order to the trigonometric expression that will be stored in this storer converts first image data that this trigonometric expression is arranged to.

15. chip for driving as claimed in claim 12, wherein this first video conversion device comprises one first sub-image conversion equipment and one second sub-image conversion equipment, first image data that this first sub-image conversion equipment is arranged in order to the strip formula that this central processing unit interface is received converts second image data that the strip formula is arranged to, and this second sub-image conversion equipment converts second image data that a trigonometric expression is arranged in order to second image data that this strip formula is arranged.

16. chip for driving as claimed in claim 15, also comprise at least one second video conversion device, be coupled between this storer and this digital/analog converter, second image data of arranging in order to the trigonometric expression that will be stored in this storer converts first image data that this trigonometric expression is arranged to.

17. a chip for driving is used for converting the image data that the strip formula is arranged to image data that trigonometric expression is arranged, this chip for driving comprises:

At least one central processing unit interface is in order to receive the image data that the strip formula is arranged;

At least one first video conversion device is coupled to this central processing unit interface, and first image data of arranging in order to the strip formula that this central processing unit interface is received converts second image data that a strip formula is arranged to;

At least one storer is coupled to this first video conversion device, in order to store second image data that strip formula that this first video conversion device transmits is arranged;

At least one second video conversion device is coupled to this storer, converts first image data that a trigonometric expression is arranged in order to second image data that the strip formula is arranged; And

At least one digital/analog converter is coupled to this second video conversion device, converts the analog image data in order to the image data that trigonometric expression is arranged.

18. chip for driving as claimed in claim 17, wherein this second video conversion device comprises one first sub-image conversion equipment and one second sub-image conversion equipment, this first sub-image conversion equipment converts first image data that this strip formula is arranged in order to second image data that the strip formula is arranged, and this second sub-image conversion equipment converts first image data that this trigonometric expression is arranged in order to first image data that this strip formula is arranged.

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