KR101030657B1 - Flat display panel and image display method - Google Patents

Flat display panel and image display method Download PDF

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Publication number
KR101030657B1
KR101030657B1 KR1020030093909A KR20030093909A KR101030657B1 KR 101030657 B1 KR101030657 B1 KR 101030657B1 KR 1020030093909 A KR1020030093909 A KR 1020030093909A KR 20030093909 A KR20030093909 A KR 20030093909A KR 101030657 B1 KR101030657 B1 KR 101030657B1
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KR
South Korea
Prior art keywords
panel
image
addressing
horizontal direction
display
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KR1020030093909A
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Korean (ko)
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KR20050062908A (en
Inventor
유수호
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사천홍시현시기건유한공사
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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00Command of the display device
    • G09G2310/02Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0264Details of driving circuits
    • G09G2310/0283Arrangement of drivers for different directions of scanning
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen

Abstract

The present invention relates to an organic electroluminescent panel that drives an image by implementing scan lines vertically and column lines horizontally, and a method of addressing when inputting an image into a memory and writing a stored image for display. Disclosed is an image display method capable of securing sufficient duty by applying differently.
Therefore, the present invention provides a control unit equipped with a graphics memory; A panel for displaying an image; A scan driver configured at an upper part of the panel to provide a scan signal in a vertical direction to the panel as a control signal output from the controller; And a column driver configured on one side of the panel to provide a column signal to the panel in a horizontal direction as data and a control signal output from the controller, and vertically scan the data scanned in the horizontal direction when the controller stores the input image in the graphic memory. The first addressing is performed in correspondence with the direction, and the second addressing is performed by matching the data scanned in the horizontal direction in the vertical direction when displaying an image stored in the graphic memory on the panel.

Description

Flat display panel and image display method

1 is a block diagram of a conventional organic electroluminescent panel

2 is a view for explaining an image display method of a conventional organic electroluminescent panel.

3 is a block diagram illustrating a preferred embodiment of a flat panel display panel according to the present invention.

4 is a view for explaining an image display method according to an embodiment of the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display panel, and more particularly, to a flat panel display panel which drives an image by implementing scan lines vertically and column lines horizontally, and when storing an input image into a memory and storing images for display. The present invention relates to an image display method capable of ensuring sufficient duty by applying different addressing methods when writing.                         

Recently, flat panel displays have been commercialized in various ways such as liquid crystal displays, organic electroluminescent devices, and plasma display devices.

Among these, the organic electroluminescent device is characterized in that when the voltage is applied to both electrodes by stacking the organic light emitting layer, electrons and charges are recombined in the organic light emitting layer to emit light.

BACKGROUND ART A flat panel display panel using the organic electroluminescent element is widely used in a mobile communication terminal, a PDA, and the like.

In the flat panel display panel, as shown in FIG. 1, a column line 12 and a scan line 14 are formed on the panel 10, and a subpixel is formed at a point where the column line 12 and the scan line 14 cross each other. Is implemented. The sub-pixels correspond to R, G, and B, respectively, and the sub-pixels corresponding to each of the R, G, and B are combined and implemented as one unit pixel 16. An array of subpixels corresponding to R, G, and B constituting the unit pixel 16 is formed horizontally along the scan line 14.

In addition, a column driver 24 configured to output data to the column line 12 is formed above the panel 10, and a scan driver 26 that outputs a scan signal to the scan line 14 on one side of the panel 10. ) Is configured.

In addition, the input image is input to the control unit 20, and the control unit 20 includes a graphic memory 22 to write the input image, read the stored image for display, and output the data signal and the control signal accordingly. 24) and a scan driver 26.                         

That is, when the resolution of the panel is 176 x 220, the control unit 20 scans the input image in the line unit or the predetermined number of pixel units (in the burst mode) from the upper left to the lower right, and the graphics memory 22 is scanned. The addressing direction for storage is also set and written from the upper left to the lower right in the same manner as the scan direction.

In addition, even when the image stored in the graphic memory 22 is displayed, the control unit 20 advances the addressing from the upper left to the lower right in units of lines or a predetermined number of pixels (in the burst mode). Accordingly, the scanned data is sequentially displayed in units of lines or a predetermined number of pixels (in the burst mode) from the upper left portion of the panel 10 to the lower right direction.

As the flat panel display panel using the conventional organic EL device configured as described above is gradually developed for high image quality, the number of scan lines is increasing.

However, if the scan line is gradually increased to realize a good display screen in a limited size panel, the scan signal duty is limited by that amount.

Therefore, when the duty is limited and there is not enough time to express the data applied to the column line, sufficient luminance is not guaranteed and the luminance of the display screen is deformed.

An object of the present invention is to ensure sufficient duty of a scan signal by adjusting the arrangement of column lines and scan lines of a flat panel display panel.                         

Another object of the present invention is to write an image to be stored in the graphic memory, and display the image in a state where luminance is sufficiently secured by applying addressing differently when reading to display the stored image.

According to an aspect of the present invention, there is provided a flat panel display panel including: a controller having a graphic memory; A panel configured to have a long axis in a vertical direction and a short axis in a horizontal direction to display an image; A scan driver configured at an upper portion of the panel to provide a scan signal to the panel in a vertical direction in response to a control signal output from the controller; And a column driver configured at one side of the panel to provide a column signal to the panel in a horizontal direction in response to data and control signals output from the controller.

The control unit differs between the first addressing when storing data in the graphic memory and the second addressing when reading data from the graphic memory, and scans an input image in a horizontal direction and then addresses the image memory in a vertical direction. Thereby storing the input image in a 90 ° rotated state, reading the image stored in the graphic memory in a horizontal direction, and then addressing the image stored in the graphic memory in a vertical direction by rotating the image stored in the graphic memory by 90 °. To restore the display.

The column driver may be disposed on the right side of the panel, and the controller may scan every line in the horizontal direction of data stored in the graphic memory, and sequentially display each line from right to left in the scanned data. 2 Perform addressing.

The controller may perform at least one of the first addressing and the second addressing by applying a burst mode to perform the corresponding addressing by a predetermined number of pixels.

The controller may further include a buffer for storing the data of the predetermined number of pixels in order to apply the burst mode to the second addressing.

The scan driver may perform a dual scan to display the image on the panel.
In the image display method of a flat panel display panel according to the present invention, the drive to store the input image in the graphics memory and then display the panel, the panel is formed in a structure having a long axis in the vertical direction and a short axis in the horizontal direction An image display method of a flat panel display panel, wherein the control unit scans the input image in a horizontal direction and stores the image in a graphic memory, and designates an address such that data scanned in the horizontal direction is sequentially stored in a vertical direction. A first addressing step of storing in a rotated 90 ° state; And the controller reads the image stored in the graphic memory and displays the image stored in the graphic memory, and designates an address such that data read in the horizontal direction from the graphic memory is sequentially displayed in the vertical direction of the panel. And a second addressing step of reversing and rotating the 90 ° back to the input image.

Hereinafter, exemplary embodiments of a flat panel display panel and an image display method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, the flat panel display panel may include an organic light emitting panel.

The flat panel display panel according to the present invention constitutes a column line in a horizontal direction and a scan line in a vertical direction on the panel, and correspondingly arranges a scan driver on an upper portion of the panel and a column driver on one side (the right side of the embodiment). Place it.

Specifically, referring to FIG. 3, a column line 32 and a scan line 34 are formed on the panel 30, and a sub pixel is implemented at a point where the column line 32 and the scan line 34 cross each other. do. The panel 30 displaying an image has a long axis in the vertical direction and a short axis in the horizontal direction.
The sub-pixels correspond to R, G, and B, respectively, and the sub-pixels corresponding to each of the R, G, and B are combined and implemented as one unit pixel 36. An array of subpixels corresponding to R, G, and B constituting the unit pixel 36 is vertically formed along the scan line 34.

In addition, a column driver 44 configured to output a column signal (data) to the column line 32 is formed at one side of the panel 30, and a scan signal is output to the scan line 34 at the upper part of the panel 30. The scan driver 46 is configured.

Then, the input image is input to the control unit 40, the control unit 40 is equipped with a graphics memory 42 to write to store the input image and to read the stored image for display and to thereby receive the data signal and the control signal accordingly. The column driver 44 and the scan driver 46 are provided.
The scan driver 46 on the panel 30 provides a scan signal in the vertical direction to the panel 30 in response to a control signal output from the controller 40, and the column driver 44 on one side of the panel 30 is provided. The column signal is provided to the panel 30 in the horizontal direction in response to the data and the control signal output from the controller 40.

Herein, the control unit 40 according to the present invention reads the first address to be written when the input image is stored in the graphic memory 42, and reads the image stored in the graphic memory 42 to be displayed on the panel 30. Different second addressing.
Referring to FIG. 4, the controller 40 scans the input image in a horizontal direction and then stores the input image in a 90 ° rotated state by addressing the graphic image in a vertical direction. Subsequently, the controller 40 reads the image stored in the graphic memory 42 in the horizontal direction, and then addresses the image stored in the graphic memory 42 by 90 ° by rotating the image in the vertical direction to the panel 30. The image is restored and displayed on the panel 30.

An embodiment will be described in detail with an example in which the input image has a resolution of 176 × 220 and the panel 30 is also configured to implement a resolution of 176 × 220.

First, the addressing method to be written when storing in the graphics memory 42 will be described.

The controller 40 reads the input image in units of horizontal lines and writes the address to the graphic memory 42 in units of vertical lines. That is, the input image is read in the X direction (horizontal direction) and addressed and written to the graphic memory 42 in the Y direction (vertical direction).

That is, the scan start point (1, 1) of the upper left position of the input image is addressed to the lower left position in the graphics memory 42, and the scan end points (220, 176) of the lower right position of the input image are the graphics memory 42 Is addressed to the upper right position.

The image addressed and stored in the graphics memory 42 as described above is consequently stored in a 90 ° rotation to the left.
As described above, the controller 40 scans the input image in the horizontal direction and stores it in the graphic memory 42, but designates an address so that the data scanned in the horizontal direction is sequentially stored in the vertical direction, thereby rotating the input image by 90 °. A first addressing step of storing in state is performed.

 Thereafter, the controller 40 describes an addressing method of reading an image stored in the graphic memory 42 for display on the panel 30.

The stored image of the graphics memory 42 stored with the input image (original image) rotated 90 ° to the left is read and read in the horizontal direction (X direction) from the upper left position in the stored state.

In the embodiment of the present invention, the column driver 44 is configured at the right side of the panel 30 and the scan driver 46 is configured at the top of the panel 30. Therefore, as described above, the data which leads every line in the horizontal direction in the graphic memory 42 is input in the vertical direction (Y direction), and the display proceeds in the horizontal direction.

That is, the data addressed to the upper left positions (1, 176) of the graphic memory 42 correspond to the upper right positions (1, 1) of the panel 30, and the upper right positions (220, 176) of the graphics memory 42. ) And the data read out correspond to the lower right positions 220 and 176 of the panel 30.

As a result, the image stored in the state rotated 90 ° to the left is returned to the original state and displayed as it is rotated 90 ° to the right.
As described above, the controller 40 reads an image stored in the graphic memory 42 and displays the image on the panel 30, and the data read in the horizontal direction from the graphic memory 42 is sequentially in the vertical direction of the panel 30. By specifying an address to be displayed, a second addressing step is performed in which the image stored in the graphics memory 42 is reversed by 90 ° to restore and display the input image.

According to the addressing method described above, an embodiment according to the present invention can display an image without deformation of original image data. Thus, in the configuration of FIG. According to the scan line is composed of 176 lines.

As a result, since the scan period divided into 1/220 of one frame period is increased to 1/176, the duty for providing the scan signal is guaranteed. Also, the effect can be doubled by applying dual scan.

Scanning in burst mode (such as in units of 4 pixels or units of 8 pixels) for speed improvement and power consumption reduction in each of addressing for writing to the graphics memory 42 and addressing for reading to the panel 30 is possible. It can be variously applied according to the intention.

For reference, addressing for writing to the graphic memory 42 and addressing for reading to the panel 30 according to an embodiment of the present invention may be implemented by the following programming.

If XA is defined as the address for driving 176 scans and YA is the address for driving 220 data,

Addressing for writing to the graphics memory 42,

for (y = 1, y <= YA; y ++) {

   for (x = 1, x <= XA; x ++) {

GRAM (x, y) = Image_data (R, G, B 18 bits); // store 1 pixel at a time in Gram}                     

Can be implemented as

To apply burst mode,

for (y = 1, y <= YA; y ++) {

   for (x = 1, x <= XA; x = x + 4) {// light every 4 pixels

GRAM (x, y) = Image_data (R, G, B 18 bits) × 4;}

It can be implemented as.

On the other hand, the addressing for the lead to the panel 30,

for (x = 1, x <= XA; x ++) {

   for (y = 1, y <= YA; y ++) {

GRAM (x, y) = Image_data (R, G, B 18bits); / 1 scan of pixel}

Can be implemented as

To apply burst mode,

for (x = 1, x <= XA; x ++) {

   for (ys = 1, ys <= YA; ys = ys + 8) {// light every 8 pixels

GRAM (x, ys) = Image_data (R, G, B 18 bits) x 8;

// Scan the 8 pixels at once by extending the bandwidth of GRAM from 18 to 144.

// The panel needs to send 1 pixel, so the control requires an 8 pixel buffer.}

It can be implemented as.

 According to the present invention, the arrangement of the column lines and the scan lines of the organic electroluminescent panel may be adjusted to ensure sufficient duty of the scan signal, and the input image may be stored in the graphic memory and separately addressed in the process of displaying the stored images. By applying this, the image can be displayed in a state where luminance is sufficiently secured without deformation of the original image.

Claims (7)

  1. A controller equipped with a graphics memory;
    A panel configured to have a long axis in a vertical direction and a short axis in a horizontal direction to display an image;
    A scan driver configured at an upper portion of the panel to provide a scan signal to the panel in a vertical direction in response to a control signal output from the controller; And
    A column driver configured at one side of the panel to provide a column signal to the panel in a horizontal direction in response to data and control signals output from the controller,
    The control unit differs between the first addressing when storing data in the graphic memory and the second addressing when reading data from the graphic memory, and scans an input image in a horizontal direction and then addresses the image memory in a vertical direction. Thereby storing the input image in a 90 ° rotated state, reading the image stored in the graphic memory in a horizontal direction, and then addressing the image stored in the graphic memory in a vertical direction by rotating the image stored in the graphic memory by 90 °. Flat panel display, characterized in that to restore the display.
  2. The method of claim 1,
    The column driver is disposed on the right side of the panel, and the control unit scans every line in the horizontal direction of data stored in the graphic memory, and the second addressing to sequentially display each line from right to left. And a flat panel display panel.
  3. The method of claim 1,
    And the control unit performs at least one of the first addressing and the second addressing by applying a burst mode to perform corresponding addressing by a predetermined number of pixels.
  4. The method of claim 3, wherein
    And the control unit further includes a buffer for storing the data of the predetermined number of pixel units to apply the burst mode to the second addressing.
  5. The method of claim 1,
    And the scan driver performs dual scanning.
  6. An image display method of a flat panel display panel in which an input image is stored in a graphic memory and then driven to display on a panel, wherein the panel has a structure having a long axis in a vertical direction and a short axis in a horizontal direction.
    A first addressing unit configured to scan the input image in a horizontal direction and store it in a graphic memory, and to designate an address so that data scanned in the horizontal direction is sequentially stored in a vertical direction and store the input image in a 90 ° rotated state step; And
    The controller reads an image stored in the graphic memory and displays the image on the panel, and designates an address so that data read in the horizontal direction from the graphic memory is sequentially displayed in the vertical direction of the panel. And a second addressing step of reversing the rotation to restore the input image to display the input image.
  7. The method of claim 6,
    And applying a burst mode to at least one of the first addressing step and the second addressing step to perform corresponding addressing in units of a predetermined number of pixels.
KR1020030093909A 2003-12-19 2003-12-19 Flat display panel and image display method KR101030657B1 (en)

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KR1020030093909A KR101030657B1 (en) 2003-12-19 2003-12-19 Flat display panel and image display method
PCT/KR2004/003338 WO2005059882A1 (en) 2003-12-19 2004-12-17 Flat display panel and image display method

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KR20100083873A (en) 2009-01-15 2010-07-23 삼성전자주식회사 Method of processing data, apparatus for performing the same and display apparatus having the apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990011821A (en) * 1997-07-25 1999-02-18 구자홍 Ac PDP driving system
KR20020013831A (en) * 1999-11-12 2002-02-21 요트.게.아. 롤페즈 Liquid crystal display device with high brightness
JP2003109510A (en) * 2001-09-28 2003-04-11 Mitsubishi Electric Corp Plasma display device
KR20030091480A (en) * 2002-05-28 2003-12-03 엘지.필립스 엘시디 주식회사 Liquid crystal display device and method for operating the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100777791B1 (en) * 1999-11-12 2007-11-22 티피오 홍콩 홀딩 리미티드 Liquid crystal display device with high brightness
KR100470172B1 (en) * 2001-06-22 2005-02-04 주식회사 임팩트라 Mobile Station having Display Part Convertible Vertical into Horizontal
JP2003066364A (en) * 2001-08-22 2003-03-05 Sharp Corp Head mounted display device and head mounted display system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR19990011821A (en) * 1997-07-25 1999-02-18 구자홍 Ac PDP driving system
KR20020013831A (en) * 1999-11-12 2002-02-21 요트.게.아. 롤페즈 Liquid crystal display device with high brightness
JP2003109510A (en) * 2001-09-28 2003-04-11 Mitsubishi Electric Corp Plasma display device
KR20030091480A (en) * 2002-05-28 2003-12-03 엘지.필립스 엘시디 주식회사 Liquid crystal display device and method for operating the same

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