KR101233471B1 - multi-LCD resolution sensing apparatus and method of mobile system - Google Patents

Abstract

The present invention relates to a multi-resolution detection control device and method for a portable device, and more particularly, to a multi-resolution detection control device and method for a portable device for detecting and adjusting the LCD liquid crystal having a different resolution through one main board. It is about. According to the present invention, after adjusting the LCD data of LCDs having different resolutions in advance in a registry file, the resolution of the LCDs input to the LCD controller of the main board is detected, and the adjustment data (RGB data) of the corresponding LCDs are detected. , Power data, etc.) and screen size to adjust and adjust. Therefore, according to the present invention, the LCD panel having different resolutions can be supported through one main board by using the characteristic difference of the LCD panel. As a result, after one product is released, it is easy to produce a subsequent model, and when making a PDA product, a compatible product can be designed to reduce manufacturing costs.

LCD, VGA, QVGA, Resolution Detection

Description

Multi-LCD resolution sensing apparatus and method of mobile system

1 is a state diagram showing a connection relationship between the LCD and the LCD controller.

Figure 2a is a block diagram showing a state in which the QVGA LCD is connected to the LCD controller of the portable device according to the present invention.

Figure 2b is a block diagram showing a state where the VGA LCD of the portable device according to the present invention connected to the LCD controller.

3 is an operation control flow diagram illustrating a control process for detecting the resolution of the LCD connected to the portable device according to the present invention.

           Explanation of symbols on the main parts of the drawings

100a: QVGA LCD LCD 100b: VGA LCD LCD

110: LCD controller R: pull-up resistor

The present invention relates to a multi-resolution detection control device and method for a portable device, and more particularly, to a multi-resolution detection control device and method for a portable device for detecting the characteristics of the LCD having different resolutions through one main board. will be.

Recently, as a portable device, the trend of PDAI is changing from 3.5-inch QVGA LCD (240 × 320) to VGA LCD (640 × 480) with high resolution LCD. However, if you want to make a VGA that supports the VGA LCD, you need to make a new control board and create a new ROM image.

1 is a state diagram illustrating a connection relationship between an LCD and an LCD controller.

An LCD controller 40 for outputting image data and an LCD controller 20 for detecting a resolution of the LCD and controlling whether to output an image according to the resolution are illustrated. When the LCD 40 is connected to the LCD controller 20, RGB data, POWER data, clock signal lines, etc. according to the resolution of the LCD 40 are input to the LCD controller 20. At this time, the levels of RGB data, POWER data, clock signal lines, etc. input to the LCD controller 20 are different according to the resolution of the LCD liquid crystal 40. As a result, the LCD controller 20 detects the input level, so that it is possible to grasp the resolution of the LCD liquid crystal 40.

The resolution of the LCD liquid crystal 40 is different for each VGA LCD and QVGA LCD, the VGA LCD has a resolution of (640 × 480), the QVGA LCD has a resolution of (240 × 320).

As shown in the figure, when the LCD liquid crystal 40 is connected on the LCD controller 20, the LCD controller 20 reads the registry value of the connected LCD liquid crystal 40, the LCD according to the read registry value (40) Adjust so that image data is output in the best condition.

In order to apply the LCD liquid crystal 40 as a display means on the display, the LCD controller 20 configured on the main board of the portable device conventionally executes a registry control flow of the LCD liquid crystal designated according to each resolution. That is, in the conventional LCD controller 20, a registry value for output control of the LCD liquid crystal 40 is set in advance. And when the LCD liquid crystal 40 is connected to the LCD controller 20, the output is adjusted to suit the resolution of the LCD liquid crystal 40 through a preset registry value. Therefore, when the resolution of the LCD liquid crystal 40 is not suitable for the LCD controller 20, it was impossible to normally output the optimum condition through the LCD liquid crystal 40.

Therefore, the above-mentioned prior art had the following problems.

Conventionally, in the case of a product related to PD, after one product is released, a new form of a similar upgrade is released by upgrading an LCD, a wireless LAN, a memory, and the like. However, conventionally, when creating an upgraded product, the main board (control module) upgraded with the basic product could not be attached, and a new mainboard had to be made. As a result, to create a new main board, the design and fabrication steps must be repeated, resulting in a cost and time as much as that of the existing product.

Accordingly, an object of the present invention is to provide a multi-resolution detection control apparatus and method for a portable device for controlling a different resolution of the LCD to be detectable using a single main board.

According to an aspect of the present invention, there is provided a multi-resolution detection control apparatus for a portable device, the multi-LCD liquid crystal having a different resolution; The LCD controller detects the resolution of the multiple LCD and controls the output of the LCD. The resolution of the multiple LCD connected to the LCD controller is a level of a predetermined port (GPIO pin 55). It is characterized by reading the judgment.

In order to achieve the above object, a multi-resolution detection control method of a portable device according to the present invention comprises: a setting step of dividing adjustment data (RGB data, power data, etc.) according to the resolution of an LCD according to each resolution and storing it in a registry file Wow; A first data read step of reading data signals input from the specific port when the LCD is connected to a specific port of the LCD controller; A resolution detection step of detecting the resolution of the LCD liquid crystal based on the data signal detected from the data read step; A second data read step of reading adjustment data in the registry file according to the resolution detected through the resolution detection step; And an output adjustment step of adjusting an image output according to the resolution of the LCD liquid crystal based on the adjustment data read through the second data lead step.

In the present invention, the output adjustment step, characterized in that it further comprises a size calculation step of calculating the size of the LCD liquid crystal according to the resolution.

In the present invention, the specific port is characterized in that the GPIO pin 55 of the LCD controller.

In the present invention, the LCD liquid crystal is characterized by being divided into VGA LCD and QGVA LCD.

Hereinafter, a multi-resolution detection control apparatus and method for a portable device according to the present invention will be described.

2A is a block diagram illustrating a state in which a QVGA LCD is connected to an LCD controller of a portable device according to the present invention.

As shown, when the QVGA LCD liquid crystal is used as the display means of the portable device (in the embodiment of the present invention, PD), the following control operation is performed. When the QVGA LCD liquid crystal (100a) is connected to the LCD controller 110 in the system, the LCD controller 110 determines the resolution of the connected LCD liquid crystal (100a), the RGB data and power to output the image data at the highest resolution Adjust

To this end, as shown in FIG. 2A, the pull-up resistor R is connected between the LCD controller 110 and the LCD 100a, and a high signal generated by the pull-up resistor R is applied to the GPIO 55 of the LCD controller 110. Is input to pin 1.

The LCD controller 110 determines the input signal. At this time, in order to determine the input signal, different reference data are stored in a temporary file (or separate memory means) according to the resolution of the LCD liquid crystal 100a, and then whether the input signal is a high signal or a low signal. Determine. As a result of the determination, the LCD controller 110 determines that the QVGA LCD liquid crystal 100a is connected as a liquid crystal display of a portable device.

As such, the LCD controller 110 determines that the LCD liquid crystal is the QVGA LCD liquid crystal 100a based on the high signal input from the GPIO pin 55, and then displays the initial QVGA LCD liquid crystal on the memory (not shown separately) of the portable device. The registry value is stored. In other words, the resolution value of the QVGA LCD is recorded in the registry file.

Thereafter, the LCD controller 110 reads a registry value according to the resolution of the QVGA LCD liquid crystal 100a and adjusts RGB data and power so as to output image data in the best condition based on the read value. do.

In the present invention, according to the resolution of the LCD liquid crystal connected to the LCD controller 110, the registry value according to each resolution is assigned to different memory areas.

Figure 2b is a block diagram showing a state in which the VGA LCD of the portable device according to the present invention is connected to the LCD controller.

As shown, when the VGA LCD liquid crystal 100b is used as a display means of a portable device (in the embodiment of the present invention, PD), the following control operation is performed. When the VGA LCD liquid crystal 100b is mounted on the LCD controller 110 in the system, the LCD controller 110 determines the resolution of the mounted LCD, and adjusts RGB data and power so that image data is output at the best resolution.

To this end, as shown in FIG. 2B, pin 55 of the GPIO on the LCD controller 110 is connected to the HISYSC port of the VGA LCD. Since the high sink port is grounded, a low signal is input to pin 55 of the LCD controller 110. As a result, the LCD controller 110 determines that the VGA LCD liquid crystal 100b is configured as a liquid crystal display of a portable device.

In order to detect the difference in resolution of the liquid crystal as described above, after storing the input signal according to the LCD liquid crystal 100a in the temporary storage file, it is determined whether the input signal is a high signal or a low signal.

As described above, the present invention detects the VGA LCD liquid crystal 100b by the low signal input from pin 55 of the LCD controller 110, and then displays the VGA LCD liquid crystal on the memory (not shown separately) of the portable device. It will store the initial registry value for. In other words, the resolution value of the VGA LCD is recorded in the registry file.

Thereafter, the LCD controller 110 reads a registry value according to the resolution of the VGA LCD, so that the LCD liquid crystal 100b outputs image data in the best condition based on the read value. And so on.

In the present invention, according to the resolution of the LCD liquid crystal connected to the LCD controller, the registry value for each resolution is assigned to different memory areas.

Meanwhile, a simple programming process for the control operation of the control configuration will be described with reference to the following embodiments.

The present invention controls the process of specifying a registry value for the resolution of the LCD and the process of calculating the screen size by loading the resolution value of the mounted LCD.

First, the programming to specify the registry value for the resolution of the LCD is as follows.

Initialization code SAMPLE

temp = GPIO_55_GPLR; / GPIO reads pin 55 and saves in TEMP

if (HIGH == GPIO_55_GPLR) / Whether the level of GPIO pin 55 is HIGH signal

/ Low signal

{

 SetRegistry (L "Resolution ', QVGA_Resolution_value); / level is high

/ If registry file

QVGA resolution value to /

/ Write it

}

Else

{

 SetRegistry (L "Resolution", QVGA_Resolution_value); Level is low

/ If registry file

VGA resolution value to /

/ Write it

}

After storing the values of the resolution of the LCD in the registry file through the programming process as described above, the following programming is performed in order to calculate the screen size by loading the resolution values of the mounted LCD.

Display Driver code sample

ReadRegistryData (); Read resolution value from registry file

if (LCD_Resolution == QVGA)

{

 QVGA_Memory_setting (); If it is VGA, calculate the screen size for VGA

}

Else

{

 VGA_Memory_setting (); If it is VGA, calculate the screen size for VGA

}

In the present invention, the screen size is adjusted to FRAME_BUFFER (one screen).

The registry value stored in the memory of the portable device of the present invention is controlled by the above programming process. The operation control process for this in more detail is as follows.

3 is an operation control flowchart illustrating a control process for detecting the resolution of the LCD connected to the portable device according to the present invention.

The LCDs 100a and 100b are connected to the LCD controller 110 of the portable device (step 300). Accordingly, the LCD controller 110 detects the resolution of the connected LCDs 100a and 100b. To this end, a process of designating and storing the resolution values of the LCDs 100a and 100b in a registry file or a memory (not shown separately) is required. As an embodiment of the present invention, the operation control process according to whether the LCD liquid crystal (100a, 100b), 3.5-inch QVGA LCD (240 × 320) and VGA LCD (640 × 480) is mounted.

When the LCDs 100a and 100b are connected to pin 55 of the GPIO of the LCD controller 110 of the portable device, the LCD controller 110 reads an input signal (step 310). At this time, different signals (low / high) are input to pin 55 of the GPIO of the LCD controller 110 according to the resolution of the LCDs 100a and 100b.

If the data read from the 55th pin of the GPIO of the LCD controller 110 is a low signal (step 320), the LCD controller 110 determines that the VGA LCD liquid crystal (100b) (step 330). .

Thereafter, the LCD controller 110 detects corresponding data (RGB data, power data, etc.) from the registry value for the resolution of the VGA LCD 100b to adjust the output of the LCD. To do this, it is necessary to save the resolution values of each LCD in the registry file in advance.

Based on the data, the output is adjusted by calculating the frame buffer of the VGA LCD, that is, the size of one screen (step 370).

On the other hand, if it is determined in step 310 that the data value read from the 55th pin of the GPIO of the LCD controller is a high signal, the LCD controller determines that it is a QVGA LCD liquid crystal (Step 340).

Then, the output adjustment of the LCD is detected from the registry value for the resolution of the QVGA LCD to detect the corresponding data (RGB data, power data, etc.) according to the resolution (step 350). To do this, it is necessary to save the resolution values of each LCD in the registry file in advance.

Based on the data, the output is adjusted by calculating the frame buffer of the QVGA LCD, that is, the size of one screen (step 360).

As described above, in the present invention, liquid crystals of LCDs having different resolutions, such as QVGA and VGA, are detected by the LCD controller of one main board so that the respective resolutions can be properly outputted according to the resolutions. Adjusting is a basic technical idea.

According to the present invention, when the resolution of the pin is automatically detected using the GPIO pins having different pin levels, the existing main board can be used as it is, so that the design, manufacturing process, etc. can be omitted in terms of productivity, thereby achieving cost reduction.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Therefore, the following effects can be expected due to the multi-resolution detection control apparatus and method of the portable device according to the present invention.

The present invention adjusts and controls the LCD panels having different resolutions to be supported through one main board. As a result, after a single handheld product is available, compatible product designs can be made in the production of subsequent models, reducing manufacturing costs and time.

Claims (5)

Multiple LCDs having different resolutions; An LCD controller which detects the resolution of the multiple LCDs and controls whether the LCDs are output; And a memory for specifying and storing adjustment data in the registry for multiple LCDs having different resolutions, The resolution of the multiple LCDs connected to the LCD controller is determined by reading a level of a predetermined port (GPIO pin 55), and then adjusting the video output of the LCD according to the resolution based on the adjustment data. Multi-resolution detection control device for portable equipment. A setting step of dividing adjustment data (RGB data, power data, etc.) according to the resolution of the LCD into the registry file according to each resolution; A first data read step of reading data signals input from the GPIO 55 pin when the LCD is connected to the GPIO 55 pin which is a predetermined port of the LCD controller; A resolution detection step of detecting the resolution of the LCD liquid crystal based on the data signal detected from the data read step; A second data read step of reading adjustment data in a registry file according to the resolution detected through the resolution detection step; And an output adjustment step of adjusting an image output according to the resolution of the LCD, based on the adjustment data read through the second data read step. The method of claim 2, The output adjustment step, And a size calculating step of calculating the size of the LCD according to the resolution. delete The method of claim 2, The LCD liquid crystal is divided into VGA LCD and QGVA LCD, the multi-resolution detection control method of a portable device.

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