KR20070092857A - Display apparatus and method - Google Patents

Abstract

A display device and a method for displaying an image using the same are provided to supply a high-quality image to a user by capturing only a portion of a high-resolution input image signal, which corresponds to a low resolution without conversion of resolution. When an image signal having a resolution higher than a predetermined resolution level is inputted from a signal source, a signal processing unit captures and scales only a portion of the image signal which corresponds to the predetermined resolution level. The signal source includes a user input part, a central processing part, and the first communication interface unit. A display panel displays the scaled image signal on an active area.

Description

Display apparatus and method

1 is a view schematically showing a display system including a display device according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a method of displaying an image according to FIG. 1;

3 is a flowchart for describing a process of generating a command for requesting a change of a capture area in the computer of FIG. 1;

4 is a diagram illustrating an analog video signal, a sampling clock signal, and valid data in order to explain processing in which the scaler outputs a high resolution video signal in step S220 of FIG. 2;

FIG. 5 is a view for explaining an example of a high resolution image output from the computer of FIG. 1 and an image actually displayed on the display panel of FIG. 1 in operation S225;

FIG. 6 is a diagram for describing an example of an image displayed on the display panel of FIG. 1 by operation S250 of FIG. 2.

Description of the main parts of the drawing

100: computer 200: display device

210: second communication interface unit 220: signal processing unit

230: display panel 240: storage unit

250: control unit

The present invention relates to a display apparatus and method, and more particularly, to a display apparatus and method capable of capturing and displaying only a partial region and selectively displaying an undisplayed region without converting the input high resolution into a low resolution. will be.

The display apparatus is a device for displaying an image signal provided from an image source source. When the display apparatus receives an image signal having a resolution different from that set in the display apparatus from the image source source, the display apparatus converts the image signal to a resolution set in the display apparatus and displays the image signal. Perform the action.

In particular, when a high resolution video signal is input from an image source source, the display apparatus reduces and converts the input video signal so that the entire active area of the input video signal is displayed in the active area of the display panel to provide an image to the user.

For example, an image source, such as a computer, provides a wide format high resolution (e.g., 1280 x 768), while the display device is not a wide format but low resolution (e.g., 1024 x 768). In this case, the display apparatus processes the display apparatus to display the entire input image by down scaling the high resolution image signal to the set low resolution.

However, when a conventional display apparatus down scales an image signal, the input image signal is distorted to finally display a low quality image, thereby providing a high quality image to a user.

The present invention has been made to solve the above problems, and an object of the present invention is to display only a partial region without changing the resolution of the input high resolution, and display on the screen when the display of the partial region that is not displayed is requested. The present invention provides a display apparatus and method capable of providing a high resolution image in which distortion does not occur.

In order to solve the above technical problem, the display apparatus according to the present invention, when an image signal of a higher resolution than a predetermined resolution is input from a signal source source, is mapped to the size of the predetermined resolution of the high resolution image signal A signal processor for capturing and scaling only an image signal of an area; And a display panel configured to display the scaled image signal in an active area.

In more detail, the signal source source includes: a user input unit for requesting display of a video signal corresponding to an inactive area of the display panel among the high resolution video signals; A central processing unit for generating a command to change the captured area of the high resolution video signal when a display of the video signal corresponding to the inactive area is requested; And a first communication interface unit transmitting the generated command.

Preferably, the second communication interface for receiving the transmitted command; And when the command is received, capture an image signal mapped to the size of the predetermined resolution among the image signals of the input resolution, and move the captured area in the direction of the non-active area to partially or all of the non-active area. And a controller configured to control the scaler to include an image signal corresponding to the scaler.

Here, the central processing unit checks the coordinates of the pointer of the user input unit positioned on the display panel, and generates the command when the coordinates of the pointer are located in an inactive area of the display panel.

On the other hand, to solve the above technical problem, the image display method according to the present invention, the step of inputting a video signal of a higher resolution than the predetermined resolution from the signal source source; Capturing only a video signal of an area mapped to the preset resolution of the high resolution video signal; Scaling the captured video signal; And displaying the scaled video signal in an active area of a display panel.

Preferably, the step of requesting the display of the video signal corresponding to the inactive area of the video signal of the high resolution; Generating a command to change the captured area of the high resolution video signal when the display is requested; When the command is generated, a video signal mapped to the size of the predetermined resolution is captured among the input high resolution video signals, and the captured area is moved in the direction of the inactive area to partially or entirely the inactive area. Capturing a video signal corresponding to the video signal; And scaling and displaying an image signal including a part or the entirety of the captured inactive region.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a view schematically showing a display system including a display device according to a preferred embodiment of the present invention.

Referring to FIG. 1, the display system includes a computer 100 and a display apparatus 200 connected to the computer 100.

First, the computer 100 applied as a signal source source supports image signals of various resolutions and transmits the image signals to the display apparatus 200. To this end, the computer 100 may include a user input unit 110, a graphics card 120, a central processing unit (CPU) 130, a ROM 140, a RAM 150, a hard disk drive (hereinafter referred to as 'HDD'). 160 and the first communication interface unit 170. The bus 100a is a data transmission path between each block described above.

The user input unit 110 is a user interface for requesting a function supported by the external device 100, and a keyboard, a mouse, a touch panel, and the like are applied. When the computer 100 and the display apparatus 200 are connected to communicate with each other, a pointer P of the user input unit 110 is displayed on the screen of the display apparatus 200, so that the user and the computer 100 may enter the user input unit 110. You can check the coordinates of). In the present invention, the user input unit 110 selects a resolution of an image signal to be transmitted to the display apparatus 200, and also requests the display apparatus 200 to display an image signal located in an inactive area.

The graphics card 120 generates an analog video signal at a selected resolution. The resolution supported by the graphics card 120 is various, such as (1280 × 768), (1024 × 768), (640 × 480) in a wide format. In addition, the graphic card 120 analyzes EDID (Extended Display Identification Data) information transmitted from the display apparatus 200 through a display data channel (DDC) line to determine basic information of the display apparatus 200. The EDID information is information such as displayable resolution, horizontal / vertical frequency, etc. of the display apparatus 200 to enable a Plug and Play (P & P) function.

The CPU 130 controls the overall operation of the external device 100 using various stored control programs. In the present invention, the CPU 130 executes the graphics card 120 to generate a video signal to be transmitted to the display device 200. In addition, the CPU 130 generates various commands to request the display apparatus 200. Examples of the command may include a command for changing a capture area output from the user input unit 110 and a command for requesting location information of an active area displayed on the display apparatus 200.

The ROM 140 is a nonvolatile memory device and stores various control programs necessary to implement the functions of the computer 100.

The RAM 150 is a volatile memory device in which a program to be executed by the CPU 130 is loaded and stored from the ROM 140, or data processed by the CPU 130 is stored.

An operating system (Operation System) is stored in the HDD 160. In the present invention, a window-based operating system provided by Microsoft Inc. is stored to perform an operation of the PC 100 as an example.

In addition, the HDD 160 stores various programs including a high resolution capture driver for driving a high resolution function provided by the display apparatus 200 and an application program matching the high resolution capture driver. The high resolution function captures and displays only the video signal of the region mapped to the low resolution size among the high resolution video signals without converting the resolution when the high resolution video signal is transmitted from the computer 100 to the low resolution set in the display apparatus 200. When a change of the capture area is requested from the user input unit 110, the image signal corresponding to the inactive area of the display apparatus 200 is displayed.

The first communication interface unit 170 is a connector to which a cable for transmitting an image signal generated by the graphic card 120 to the display apparatus 200 has a plurality of pins. In more detail, the first communication interface unit 170 provides extended graphic identification data (EDID) information transmitted from the display apparatus 200 through the DDC line to the graphic card 120. In addition, the first communication interface unit 170 transmits an analog video signal and various commands generated from the CPU 130 to the display apparatus 200.

Meanwhile, the display apparatus 200 according to the exemplary embodiment of the present invention has a second communication interface 210, a signal processor 220, a display panel 230, a storage 240, and a controller 250. Descriptions related to the processing are omitted for convenience of explanation.

When the power is turned on, the second communication interface unit 210 transmits the EDID information stored in the storage unit 240 to the graphic card 120. In addition, the second communication interface unit 210 provides an analog image signal provided from the graphic card 120 to the signal processor 220.

The signal processor 220 processes the provided analog image signal into a displayable signal. To this end, the signal processor 220 includes an analog digital converter (hereinafter referred to as "ADC") 222 and a scaler 224.

The ADC 222 converts an analog video signal into a digital video signal and samples and outputs a pixel clock signal transmitted from the computer 100. The ADC 222 synchronizes the horizontal synchronizing signal, the vertical synchronizing signal, and the digital image signal by using the data enable signal transmitted from the computer 100.

The scaler 224 scales the digital video signal to a size suitable for the set resolution using the pixel clock signal provided from the ADC 224. In the present invention, when an application program matching the high resolution capture driver is executed, the scaler 224 does not downscale an image signal input at a high resolution, but the display panel 230 of the display apparatus 200 among the high resolution image signals. Capture and scale the video signal corresponding to the size of the low resolution set in. Detailed description thereof will be described later.

The display panel 230 displays the scaled digital image signal output from the scaler 224 in the active area and supports a preset resolution. For example, the display panel 230 supports a resolution of (1024 × 768), and the display panel 230 may be implemented by various devices such as a liquid crystal display panel, a cathode ray tube panel, and a plasma display panel.

The storage unit 240 stores EDID information, which is state information of the display panel 230, and a control program for driving the display apparatus 200. In addition, the storage unit 240 stores an application program related to a high resolution function.

The controller 250 controls the overall operation of the display apparatus 200 based on a signal or command applied from the user input 110 and a control program stored in the storage 240. In the present invention, the control unit 250 controls the above-described blocks to implement and display the actual image based on the analog image signal, the pixel clock signal transmitted from the graphics card 120.

In more detail, when the power is turned on, the controller 250 reads the EDID information stored in the storage 240, and then controls the second communication interface 210 to display the read EDID information in the graphic card 120. To be sent to.

In addition, the controller 250 controls the signal processor 220 to signal-process an analog video signal transmitted from the graphic card 120 to realize an actual video. In particular, when an image signal having a higher resolution than the resolution set on the display panel 230 is input from the computer 100, when the display apparatus 200 is switched to the high resolution mode, the controller 250 is based on the stored program. The scaler 224 is controlled to perform a high resolution function. That is, when a high resolution (eg, 1280 × 768) video signal higher than the low resolution (eg, 1024 × 768) of the display panel 230 is input, the controller 250 may display a display panel (eg, a high resolution video signal). The scaler 224 is controlled to capture and scale an image signal corresponding to the low resolution size (1024 × 768) set at 230 from the set reference position.

In addition, after the position of the pointer of the user input unit 110 is located in the inactive region of the display panel 230, when the display of the video signal corresponding to the inactive region is requested from the user input unit 110, the CPU 130 may respond to the request. Generate the command. When the control unit 250 receives a command generated from the computer 100, the controller 250 captures an image signal including all or part of an image signal corresponding to an inactive area, but captures and scales an image signal corresponding to a low resolution size. Control 224. The controller 250 controls the display panel 230 to display an image signal in which the capture area is changed.

2 is a flowchart illustrating the image display method of FIG. 1, and FIG. 3 is a flowchart illustrating a process of generating a command for requesting a change of a capture area in the computer of FIG. 1.

1 to 3, when a high resolution image signal higher than the resolution set on the display panel 230 of the display apparatus 200 is received from the computer 100, the controller 250 may convert the received image signal into a digital image. The signal processor 220 is controlled to convert the signal into a displayable signal (S205 and S210).

When the step S210 is performed, the control unit 250 checks whether to request to process the received video signal in the high resolution mode (S215).

When it is determined that the request is to be processed in the high resolution mode, the controller 250 switches the display apparatus 200 to the high resolution mode, and the controller 250 of the high resolution digital image signal is mapped to the size of the low resolution set in the display panel 230. The scaler 224 is controlled to capture an image signal (S220).

4 is a diagram illustrating an analog video signal, a sampling clock signal, and valid data in order to explain processing in which the scaler outputs a high resolution video signal in step S220 of FIG. 2.

Referring to FIG. 4, when an input video signal has a high resolution of 1280 × 768 and the display panel 230 supports a resolution of 1024 × 768, the scaler 224 uses a pixel clock signal. A video signal having a size of (1024 × 768) is captured from the high resolution video signal to output valid data actually displayed on the display panel 230.

When the step S220 is performed, the controller 250 controls the scaler 224 and the display panel 230 to scale and display the captured image signal (capture ①) in a size suitable for the display panel 230 (S225).

FIG. 5 is a diagram illustrating an example of an image of a high resolution output from the computer of FIG. 1 and an image actually displayed on the display panel of FIG. 1 in operation S225. Referring to FIG. 5, the scaler 224 captures only a video signal having a size equal to that of a low resolution among the high resolution video signals so that the non-captured video signal of the high resolution is not displayed on the display panel 230, and the inactive area indicated by the dotted line. It is located inside.

After the operation S225 is performed, when a command for requesting transmission of the display area information being displayed on the display panel 230 is received from the computer 100, the controller 250 checks the display area information, and checks the confirmed information on the computer. The second communication interface unit 210 is controlled to be transmitted to 100 (S230 and S235).

After a predetermined time elapses, when a command for requesting display of an image signal corresponding to an inactive area is received from the computer 100, the controller 250 captures a new image signal mapped to a low resolution size among the input high resolution image signals. However, the scaler 224 is controlled to shift the captured area in the direction of the non-active area to capture (capture ②) the image signal corresponding to part or all of the inactive area (S240 and S245). Here, the direction of the shifted non-active area means the direction in which the pointer P of the user input unit 110 is located.

In addition, the controller 250 controls the scaler 224 and the display panel 230 to scale and display the newly captured image signal (S250). In operation S250, the image (capture ②) displayed on the display panel 230 is illustrated in FIG. 6. Referring to FIG. 6, a part of the left area of the high resolution image signal provided from the computer 100 is not displayed on the display panel 230, while all the edges of the right area are displayed.

On the other hand, if it is determined in step S215 that the mode is not the high resolution mode, the controller 250 downscales the input high resolution image signal to execute a routine corresponding to the normal mode (S255).

Referring back to FIGS. 1 and 3, when the setting of the high resolution mode is requested from the user input unit 110, the CPU 130 of the computer 100 sets a high resolution mode by executing a program and a driver related to a high resolution function ( S310).

After the steps S205 to S225 of FIG. 2 are performed, when an event for requesting display of all or part of an image signal corresponding to the inactive area of the display panel 230 occurs from the user input unit 110, the CPU 130 may be used. ) Transmits a command for requesting transmission of the display area information to the display apparatus 200 to receive the display area information (S320 and S330).

In operation S320, the occurrence of the event may be generated by various options such as the number of clicks of the right or left button of the mouse, or the time when the user input unit 110 is a mouse. For example, if the right button of the user input unit 110 is selected after switching to the high resolution mode, the CPU 130 determines that the above-described event has occurred and transmits a command corresponding thereto.

When the operation S330 is performed, the CPU 130 checks the position of the pointer P located on the display panel 230 (S340).

As a result of the check, when the pointer P is located in the display area, the CPU 130 generates a command for requesting display of an image signal corresponding to the inactive area of the display panel 230 and then displays the generated command in the display device ( The second communication interface unit 210 is controlled to be transmitted to 200 (S350 and S360).

Accordingly, the display apparatus 200 receives the command in step S240 of FIG. 2 and performs steps S245 and S250.

The present invention described above is applicable to both the case where the input image is a still image or a moving image.

According to the display device and method according to the present invention, it is possible to provide a high quality image by capturing and displaying only a region corresponding to the size of the low resolution among the high resolution image signals without converting the input high resolution into the low resolution set in the display panel. Do.

In addition, when a display of an image signal corresponding to an inactive area of the display panel is requested, the captured area may be changed and recaptured to provide an original high resolution image to the user.

Although the present invention has been described in detail through the representative embodiments, those skilled in the art to which the present invention pertains can make various modifications without departing from the scope of the present invention with respect to the embodiments described above. I will understand. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

Claims (6)

A signal processor for capturing and scaling only a video signal of an area mapped to a size of the predetermined resolution among the high resolution video signals when an image signal having a resolution higher than a preset resolution is input from a signal source source; And And a display panel configured to display the scaled image signal in an active area. The method of claim 1, The signal source source, A user input unit requesting display of a video signal corresponding to an inactive area of the display panel among the high resolution video signals; A central processing unit for generating a command to change the captured area of the high resolution video signal when a display of the video signal corresponding to the inactive area is requested; And And a first communication interface unit transmitting the generated command. The method of claim 2, A second communication interface to receive the transmitted command; And When the command is received, a video signal mapped to the size of the predetermined resolution is captured among the input high resolution video signals, and the captured area is moved in the direction of the inactive area to partially or all of the inactive area. And a controller configured to control the scaler to capture an image signal corresponding to the image signal. The method of claim 2, And the central processing unit checks the coordinates of the pointer of the user input unit positioned on the display panel and generates the command when the coordinates of the pointer are located in an inactive area of the display panel. Inputting an image signal having a resolution higher than a preset resolution from a signal source source; Capturing only a video signal of an area mapped to the preset resolution of the high resolution video signal; Scaling the captured video signal; And And displaying the scaled video signal in an active area of a display panel. The method of claim 5, Requesting to display a video signal corresponding to the inactive region among the high resolution video signals; Generating a command to change the captured area of the high resolution video signal when the display is requested; When the command is generated, a video signal mapped to the size of the predetermined resolution is captured among the input high resolution video signals, and the captured area is moved in the direction of the inactive area to partially or entirely the inactive area. Capturing a video signal corresponding to the video signal; And And scaling and displaying an image signal including a part or the entirety of the captured inactive area.

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