KR100699153B1 - Method and apparatus for changing driver of panel display - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel, and more particularly, to a device for replacing a driver for a display panel and a method for replacing the same using the same. As described above, the driver replacement apparatus of the display panel according to the present invention includes a transcoding unit for converting data output from a CPU unit controlling driver code and image data into a new data code in a display device having a display panel. do.

Display Panel, LDI (LCD Driver IC), Transcode, CPU

Description

 Method and apparatus for changing driver of panel display

1 is a block diagram showing a system configured using a device for replacing a driver of a display panel according to the present invention

FIG. 2 is a detailed block diagram of an apparatus for replacing a driver of the display panel according to FIG. 1.

3 is a flowchart illustrating a driver replacement method of a display panel according to the present invention.

* Description of the symbols for the main parts of the drawings *

100: CPU 200: transcode part

210: CPU interface unit 220: Buffer unit

230: data conversion unit 240: encode selector unit

250: Out driver selector unit 260: Initialization and conversion table unit

270: driver interface 300: driver

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display panel, and more particularly, to a device for replacing a driver for a display panel and a method for replacing the same using the same.

As the information society develops, the demand for display devices is increasing in various forms, and in recent years, liquid crystal display devices (LCDs), plasma display panels (PDPs), electro luminescent (ELD), and vacuum fluorescent displays (VFD) have been developed. Various flat panel display devices have been studied, and some are used as display devices in various devices.

Among them, LCD (Liquid Crystal Display Device) is the most widely used, replacing the CRT (Cathode Ray Tube) for mobile image display devices because of its excellent image quality, light weight, thinness, and low power consumption. In addition to mobile applications such as computer monitors, various types of monitors are being developed for monitors of television devices that receive and display broadcast signals.

The LCD is driven through the LCD Driver IC (LDI), and many LDIs have a structure that drives the image according to the LCD panel by receiving image data from the CPU unit using a CPU or RGB interface standard. They control and set the relevant registers via a given interface.

In general, the procedure for driving the LCD is to turn on the LCD power and set the LDI to the LCD and the CPU to make the desired settings, and then transfer the image data to the LDI to display the desired screen on the LCD. The process takes place.

As such, the LCD panel is driven through the LCD Driver IC (LDI), but when the LDI needs to be replaced due to the emergence of a new LDI due to an advantage in price or performance, or a panel replacement, a full program modification of the LCD system is required. In addition, when the program is modified, a lot of development time and costs are required.

The present invention has been made to solve the above problems, the present invention is to provide a device for replacing the driver of the display panel LDI replacement and replacement method using the same in order to reduce the time, cost, effort, etc. when LDI replacement. have.

In the present invention for achieving the above object, the driver replacement apparatus of the display panel is a display device equipped with a display panel, the transcode for converting the data output from the CPU unit for controlling the driver code and the image data into a new data code Driver replacement device for the display panel including the

Preferably, the transcode unit includes an out driver selector for outputting a specific driver, an initialization and conversion table unit for initializing the selected specific driver and storing image data formats, an encode selector for selecting a program code of a CPU; And a buffer unit for extracting data from the code selected by the encoder and storing the data, and a data converter for converting the data stored in the buffer unit into a data format of the specific driver.

The initialization and conversion table unit is a nonvolatile memory of the EEPROM.

In addition, an arbitrary driver format is stored in the initialization and conversion table unit.

The apparatus may further include a driver interface for transmitting data in the converted format of the data converter.

 In order to achieve the above object, a method of replacing a driver of a display panel according to the present invention includes selecting a specific driving driver of the display panel, performing initialization of the selected driver, and image data input to the initialized driver. And converting the format of the image and displaying the image data on the panel in the converted driver format.

Hereinafter, a driver replacement apparatus for a display panel and a replacement method using the same will be described with reference to the accompanying drawings.

First, in describing an embodiment of the present invention, a display panel according to the present invention uses a liquid crystal display device (LCD) panel, and an LCD driver IC (LDI) for driving the LCD panel is abbreviated as a driver.

1 is a block diagram showing a system configured using a driver replacement apparatus of a display panel according to the present invention.

As shown in FIG. 1, a system using a driver replacement apparatus for a display panel according to the present invention includes a CPU 100 for controlling a display device (eg, a mobile terminal, a TV, etc.) including a display panel and a display panel. And a transcode unit 200 for receiving and storing image data output through the CPU 100 and changing a driver format to display the received image data on a display panel (not shown), and the transcode The driver 300 is configured to drive the display panel such that an image is displayed on the display panel in a driver format changed from the unit 200.

The CPU 100 transmits the image data to the transcode unit 200 through an interface that was driving a preset driver, and the transcode unit 200 transmits the image data output from the CPU unit 100 to a new driver. When the format codes are output in time order, the driver 300 receives them and displays them in a new drive format on the display panel.

That is, when the transcode unit 200 replaces the display panel or driver 300, the transcode unit 200 changes the driver code according to the replaced display panel or driver 300 by changing the data code output from the CPU unit 100. By outputting, the program can be used without replacing the program of the existing system.

FIG. 2 is a detailed block diagram illustrating a transcode unit of a driver replacement apparatus of the display panel according to FIG. 1.

As shown in FIG. 2, the transcode unit 200 according to the present invention includes a CPU interface unit 210, a buffer unit 220, a data transformer unit 230, an initialization and conversion table unit 260, and an out driver. The selector unit 250 includes an encoder selector unit 240 and a driver interface unit 270.

The out driver selector 250 is a part for selecting a driver to interface, that is, a part for selecting a new driver format when displaying image data on a display panel.

When the driver is selected by the out driver selector 250, the initialization and conversion table unit 260 receives the selected driver and stores the initialization process and the image data format of the received driver.

In addition, the initialization and conversion table unit 260 may increase the selectable driver by using an EEPROM, etc., and store separate initialization processes and image data formats of the respective drivers.

In the meantime, the CPU selector code is input through the encode selector 240 to transmit the selected program code to the CPU interface 210.

The CPU interface unit 210 extracts data from the input CPU code with reference to the encoder selector unit 240 information and transmits the data to the buffer unit 220.

The data conversion unit 230 converts the data in the buffer unit 220 with reference to the initialization and conversion table unit 260 according to a driver to interface with the data.

The driver interface 270 transmits image data according to the selected driver specification.

The operation of the driver replacement apparatus for the display panel configured as described above is as follows.

3 is a flowchart illustrating a method of replacing a driver of a display panel according to the present invention.

As shown in FIG. 3, first, after the power input (S100), an initial setting process is performed by referring to an initialization table of an initialization routine of a specific drive driver initially selected through an out driver selector terminal (S110).

When the initialization process is performed (S110), the image data is extracted from the data input through the CPU interface with reference to the encode selector terminal and stored in the buffer (S120 to S130).

Subsequently, the stored image data is converted into a data format of a driver selected from the out selector terminal (S140).

Here, the driver format conversion is illustrated as follows.

First example

Index R00H ← 0001h

                R07H ← 0000h

                R11H ← 0001h

                       :

      R22H ← image data

The first example shows an LDI interface code of Renesas, which initially starts writing 00001h to index R00H, finishes a series of settings, selects index R22H, and then writes image data.

2nd example

Command R96H

                   R99H

                   RCAH

                       :

          R5CH ← image data

The second example shows Epson's LDI interface code, which initially writes a command (concept similar to index) 96h.

If the input code of the first example is replaced with the LDI having the input code of the second example, the initial setting is the second method, and the CPU interface unit detects the index R22h of the first example, and outputs the command to R5CH of the second example. After transcoding, the image data is written.

When the image data is converted into the data format of the driver selected and converted by the out selector terminal, the image data is output and displayed on the screen (S150 to S160).

The present invention has been described above with reference to the preferred embodiments, which are merely examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not possible that are not illustrated above. For example, each component specifically shown in the embodiment of the present invention can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

As described above, the apparatus and method for replacing a driver of the display panel according to the present invention can change the driver of the display panel without changing the software for driving the display device. This eliminates the need for validation and reduces the development time and costs.

In addition, you can choose one of several drivers, allowing you to upgrade your product freely in the presence of developments.

Claims (6)

In the display device provided with a display panel, And a transcode unit configured to select a code of a CPU and a new driver, extract image data input from the CPU, and convert the extracted image data into a data format of the driver.        The method of claim 1, wherein the transcode unit An out driver selection unit for selecting a new specific driver; An initialization and conversion table unit for initializing the selected specific driver and storing an image data format; An encoding selector for selecting a program code of an input CPU; A CPU interface unit which extracts and outputs image data input from a CPU with reference to a code selected by the encoding selecting unit; A buffer unit which stores image data extracted by the CPU interface unit; And a data converter configured to convert the image data stored in the buffer unit into a data format of the selected specific driver. The method of claim 2, And the initialization and conversion table unit is a nonvolatile memory of an EEPROM. The method of claim 2, And an arbitrary driver format is stored in the initialization and conversion table unit. The method of claim 2, And a driver interface unit which transmits data to the specific driver in the converted format of the data conversion unit.  Selecting a new driving driver of the display panel; Performing initialization of the selected driver; Selecting a code of an input CPU, extracting and transmitting image data input from the CPU with reference to the selected code of the CPU; Converting the transmitted image data into a data format of the initialized driver; And outputting the image data converted into the driver format to the selected driver.

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