KR100699258B1 - Display apparatus - Google Patents

Abstract

The present invention relates to a display apparatus including a selection output unit for outputting any one of a plurality of input image signals and a scaling unit for processing the image signal from the selection output unit. According to an aspect of the present invention, there is provided a display apparatus including a user input unit for selecting an image signal for display; A counting unit continuously counting each sync signal corresponding to each of the plurality of input image signals; Based on the counting result of the counting unit, video format information corresponding to the counting result of each sync signal is stored for each video signal, and when the video signal is selected through the user input unit, the pre-stored video corresponding to the selected video signal. And a controller configured to set a setting value of the scaling unit according to format information. Accordingly, there is provided a display apparatus capable of continuously determining / storing video format information of each of a plurality of input video signals, thereby shortening a mute time when switching an external source.

Description

Display device {DISPLAY APPARATUS}

1 is a control block diagram of a display apparatus according to the related art;

2 is a control block diagram of a display device according to the present invention;

3 is a control flowchart for continuously determining / storing video format information of a plurality of video signals inputted from a display device according to the present invention;

4 is a control flowchart of selecting an image signal for display in the display device according to the present invention.

* Explanation of symbols for the main parts of the drawings

11: first source 12: second source

13: third source 20: signal conversion unit

30: scaler 31: selective output

32: scaling engine 33: synchronization signal counter

40: counting unit 41: auxiliary selective output unit

43: assistant town 50: display unit

55: user input unit 70: control unit

73: storage 75: micom

100: display device

The present invention relates to a display device, and more particularly, a display capable of continuously determining / storing video format information of each of a plurality of input video signals, thereby shortening a mute time when switching an external source. Relates to a device.

In general, the display apparatus includes a scaler that can display a video signal input from the outside so as to be displayed on a display unit, and processes the input video signal so that a user can view the video screen according to the video signal. Due to the development of technology, such a display device may be connected to various kinds of different external sources to receive various kinds of images from the outside and display the selected images.

As described above, when a user selects a specific external source of an image that a user wants to display from a predetermined menu, a conventional display apparatus receiving a plurality of images displays an image according to an image signal provided by the selected external source. Herein, the control in the case of selecting an external source to be displayed in the conventional display apparatus will be described with reference to FIG. The conventional display apparatus receives the first image signal, the second image signal, and the third image signal input from the display unit 5 and various kinds of different external sources, and processes the image signals from the selected specific external source. A scaler 10 outputted to the display unit 5, a key input unit 4 for selecting an external source of an image signal to be displayed, and a specific external source selected by a user's operation through the key input unit 4 And a control unit 7 for controlling the scaler 10 to process the video signal from the control unit.

The scaler 10 receives each of the first video signal, the second video signal, and the third video signal converted into a digital form, and selects a specific video signal selected by the control of the controller 7 (for example, the second video signal). And a video data signal (A) of the second video signal outputted from the selection output unit (1) and the video data signal according to a setting value set by the controller (7). Counts the scaling engine 2 that processes a) and outputs it to the display unit 5 and the vertical / horizontal synchronization signal b of the second image signal output from the selection output unit 1, and counts the counted result. It includes a synchronization signal counter (3) for outputting to the control unit (7).

Accordingly, in the conventional display apparatus, when an external source is selected (switched), the controller 7 controls the selection output unit 1 to output a video signal (eg, a second video signal) from the selected external source. . Accordingly, the synchronization signal counter 3 receives and counts the vertical / horizontal synchronization signal b of the second video signal and outputs the counting result to the controller 7. The controller 7 determines suitable image format information for processing the second image signal based on the counting result, and sets the setting value of the scaling engine 2 according to the determined image format information of the second image signal. . Thereafter, the scaling engine 2 processes the video data signal a of the second video signal according to the setting value set by the control unit 7.

Therefore, in the conventional display apparatus as described above, each time an external source is switched, a time for counting the vertical / horizontal synchronization signal of the converted video signal and a counting result based on the counting result are determined. Each time, it takes a long time that the screen of the display unit 5 is muted while the external source is switched.

Accordingly, an object of the present invention is to provide a display device capable of continuously determining / storing video format information of each of a plurality of input video signals, thereby shortening a mute time when switching an external source.

According to an aspect of the present invention, there is provided a display apparatus including a selection output unit for outputting any one of a plurality of input image signals and a scaling unit for processing a video signal from the selection output unit. A user input unit for selecting a signal; A counting unit continuously counting each sync signal corresponding to each of the plurality of input image signals; Based on the counting result of the counting unit, video format information corresponding to the counting result of each sync signal is stored for each video signal, and when the video signal is selected through the user input unit, the pre-stored video corresponding to the selected video signal. And a control unit for setting the setting value of the scaling unit according to the format information.

The counting unit may further include an auxiliary selection output unit sequentially outputting a synchronization signal corresponding to each of the plurality of input image signals in a predetermined order, and counting the synchronization signals output from the auxiliary selection output unit. It is preferable to include an auxiliary counter

The control unit may include a storage unit which stores image format information for each image signal, and image format information for each image signal corresponding to image format information corresponding to a counting result of each synchronization signal sequentially output from the auxiliary counter. Storing the information as information and setting a setting value of the scaling unit according to the image format information corresponding to the selected image signal among the image format information for each image signal when the image signal is selected through the user input unit. desirable.

The microcomputer preferably controls the auxiliary selection output unit to sequentially output each synchronization signal corresponding to each of the plurality of input video signals in a predetermined order.

In addition, when the video signal is selected through the user input unit, the microcomputer preferably controls the selection output unit to output the selected video signal.

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

As shown in FIG. 2, the display apparatus 100 according to the present invention includes a plurality of external sources that provide different image signals, respectively, a first image source 11, a second image source 12, and a third image source. (13), a video signal converter 20 for converting and outputting each of a plurality of video signals input from the plurality of external sources 11, 12, 13, and a plurality of images from the video signal converter 20 A scaler 30 for processing an image signal from a selected external source among the signals and outputting the image signal to the display unit 50, a user input unit 55 for selecting an external source of an image signal to be displayed, and a user input unit 55. And a control unit 70 for controlling the scaler 30 to process an image signal from a specific external source selected by the user's manipulation.

The display unit 50 receives an image signal from the scaler 30 and displays an image screen. The display unit 50 may include a display panel (not shown) for displaying an image screen and a panel driver (not shown) for processing an image signal input from the scaler 30 to display an image screen on the display panel (not shown). It is preferable to include.

The video signal conversion unit 20 is a conversion function unit for converting an input video signal to be processed by the scaler 30. When the first source 11 is an S-video source, the video signal converter 20 decodes and outputs an analog S-video signal input from the first source 11. When the second source 12 is a component source and the third source 13 is a computer, A / A for converting an analog video signal such as an input component video signal or a PC video signal into a digital video signal and outputting the same. It is preferable to include the D converter 24.

The scaler 30 is a processing unit which processes a video signal from an external source selected by the control of the control unit 70 among the plurality of video signals input from the video signal conversion unit 20 to be displayed on the display unit 50. to be. The scaler 30 may include an image from an external source (eg, the second source 12) selected by the control of the controller 70 among a plurality of digital image signals input from the image signal converter 20. A video output signal a of the selection output section 31 for outputting a signal as the video data signal a and a vertical / horizontal synchronization signal b, and a second source 12 output from the selection output section 31; And a second output from the selection engine 31 and the scaling engine 32 for processing the image data signal a and outputting the image data signal a to the display unit 5 according to a setting value set by the controller 70. And a sync signal counter 33 for receiving the counted vertical / horizontal sync signal b of the source 12 and outputting the counting result to the controller 70.

In addition, the scaler 30 includes a counting unit 40 that continuously counts a synchronization signal corresponding to each of the plurality of image signals input from the image signal converter 20, and outputs a counting result to the controller 70. do.

The counting unit 40 controls the vertical / horizontal synchronization signal b 'corresponding to each of the plurality of digital image signals input from the image signal conversion unit 20 in a predetermined order by the control of the control unit 70. Auxiliary counter 40 for counting the auxiliary selection output unit 41 and the vertical / horizontal synchronous signal (b ') output from the auxiliary selection output unit 41 and sequentially outputs the counting result to the controller 70 ). Here, the auxiliary selection output unit 41 receives a plurality of video signals and provides a mux for selectively outputting a vertical / horizontal synchronization signal corresponding to any one of the plurality of video signals under the control of the controller 70. It is desirable to be.

That is, the counting unit 40 generates vertical / horizontal synchronization signals corresponding to each of the plurality of image signals input from the external sources 11, 12, and 13 regardless of a specific external source selected for display by the user. Counting is performed sequentially according to a predetermined order, and the counting result is output to the controller 70. At this time, the predetermined order is the first source 11? Second source 12? Third source 13? First source 11? It is preferable that the order of counting all the plurality of video signals inputted from the external sources 11, 12, and 13, as in the order of, and the counting unit 40 is inputted from the external sources 11, 12, and 13. It is preferable to sequentially count the vertical / horizontal synchronization signals of each of the video signals according to the predetermined order.

The controller 70 controls the scaler 30 to process an image signal from an external source (for example, the second source 12) selected by the user's manipulation through the user input unit 55. The control unit 70 includes a storage unit 73 for storing image format information for each image signal input from the external sources 11, 12, and 13, and the counting results sequentially output from the auxiliary counter 40. The corresponding image format information is stored in the storage unit 73 as image format information for each image signal, and when the image signal is selected through the user input unit 55, the selected image among the image format information for each image signal. The microcomputer 75 sets the setting value of the scaling engine 32 according to the image format information corresponding to the signal.

The storage unit 73 stores, by the microcomputer 75, video format information corresponding to each video signal input from the external sources 11, 12, and 13 in the form of a table.

As soon as the display device 100 starts to drive, the microcomputer 75 receives the vertical / horizontal synchronization signals b 'corresponding to each of the plurality of video signals input from the video signal converter 20 in a predetermined order. The auxiliary selective output unit 41 is controlled to output sequentially. Accordingly, the auxiliary counter 40 sequentially counts the vertical / horizontal synchronization signal b ′ output from the auxiliary selection output unit 41 and outputs the counting result to the microcomputer 75.

The microcomputer 75 determines appropriate video format information corresponding to the counting result based on the counting results sequentially input from the auxiliary counter 40. The microcomputer 75 stores the determined video format information in the storage unit 73 as video format information for each video signal. The video format information is information for setting a setting value of the scaling engine 32 to optimize and process the video signal in consideration of the input resolution and data characteristics of the video signal according to the counting result of the video signal.

As such, the microcomputer 75 controls the counting unit 40 to continuously count the vertical / horizontal synchronization signals of the video signals input from the external sources 11, 12, 13 in the predetermined order. Based on the counting result from the counting unit 40, the video format information for each video signal is determined and stored. At this time, the microcomputer 75 continuously determines the video format information for each video signal according to the predetermined order, and updates the determined video format information for each video signal even if the video format information for each video signal is already stored. Save it.

In addition, the microcomputer 75 continuously determines and stores the video format information for each video signal through the counting unit 40 and determines whether the switching of an external source is input through the user input unit 55. That is, when an external source (for example, the third source 13) is selected other than an external source (for example, the second source 12) that provides the image currently displayed through the user input unit 55, the microcomputer The display unit 75 outputs a video signal from the third source 13 among the plurality of video signals input from the video signal converter 20 as a video data signal a and a vertical / horizontal synchronization signal b. The unit 31 is controlled. At the same time, the microcomputer 75 scales according to the video format information corresponding to the video signal input from the selected third source 13 based on the video format information for each video signal continuously stored in the storage unit 73. The setting value of the engine 32 is set.

Accordingly, the display apparatus 100 of the present invention, when switching the external source (for example, the second source 12-third source 13), the video signal input from the switched third source (13) Instead of counting the vertical / horizontal synchronous signals of the video signal and determining the appropriate video format information, the converted third source 13 is converted using the video format information of each video signal continuously determined and stored. It is possible to quickly set the setting value of the scaling engine 32 by directly obtaining the video format information suitable for the video signal.

Of course, as described above, the microcomputer 75 sets the setting value of the scaling engine 32 by using the stored video format information for each video signal, and the scaling engine 32 is output from the selection output unit 31. While finishing the process for processing the image data signal a of the third source 13, the synchronization signal counter 33 is a vertical / horizontal synchronization signal of the third source 13 outputted from the selection output section 31. (b) receives and counts. Therefore, after the switching of the external source (for example, the second source 12 to the third source 13) and performing the process of displaying the image from the third source 13, the microcomputer 75 is conventionally. The scaling engine 32 is controlled using the counting result from the synchronization signal counter 33.

Here, the microcomputer 75 continuously determines and updates / stores the video format information of each video signal input from the external sources 11, 12, and 13 through the counting unit 40, regardless of the switching of the external source. Of course it is.

Referring to FIG. 3, a control flow for continuously determining / storing video format information of a plurality of video signals inputted from the display apparatus of the present invention will be described below. First, the microcomputer 75 simultaneously starts driving of the display apparatus 100 and vertical / horizontal synchronization signals of the video signals input from the first source 11 among the plurality of video signals input from the video signal converter 20. The auxiliary select output unit 41 is controlled to output (b ') (S10). Accordingly, the auxiliary counter 40 counts the vertical / horizontal synchronization signal b ′ output from the auxiliary select output unit 41 and outputs the counting result to the microcomputer 75 (S20). The microcomputer 75 determines the video format information according to the counting result based on the counting result input from the auxiliary counter 40 (S30). The microcomputer 75 stores the determined video format information in the storage unit 73 as video format information corresponding to the video signal from the corresponding source (first source 11) (S40). Thereafter, the microcomputer 75 outputs the vertical / horizontal synchronization signal b 'of the video signal input from an external source (for example, the second source 12) corresponding to the next order in a predetermined order. The unit 41 is controlled (S50). Subsequently, the operations S20 to S40 are performed, and the microcomputer 75 performs a vertical / vertical image signal input from an external source (eg, the third source 13) corresponding to the next order in a predetermined order. The auxiliary selection output unit 41 is controlled to output the horizontal synchronization signal b '(S50). Thereafter, the steps S20 to S40 are performed, and the microcomputer 75 performs the vertical / vertical image signal input from an external source (for example, the first source 11) corresponding to the next order in a predetermined order. The auxiliary selection output unit 41 is controlled to output the horizontal synchronization signal b '(S50). That is, the microcomputer 75 controls the counting unit 40 to continuously count the vertical / horizontal synchronization signals of the video signals input from the external sources 11, 12, and 13 according to the predetermined order. Based on the counting result from the counting unit 40, the video format information for each video signal is determined, updated, and stored.

Referring to FIG. 4, a control flow at the time of selecting an image signal for display in the display device of the present invention will be described below. First, the microcomputer 75 determines whether a switch of an external source is input through the user input unit 55. That is, when an external source (for example, the third source 13) is selected instead of an external source (for example, the second source 12) that provides the image currently displayed through the user input unit 55 (S60). The microcomputer 75 outputs the video signal from the third source 13 among the plurality of video signals input from the video signal converter 20 as the video data signal a and the vertical / horizontal synchronization signal b. The selection output unit 31 is controlled to control (S70). At the same time, the microcomputer 75 scales according to the video format information corresponding to the video signal input from the selected third source 13 based on the video format information for each video signal continuously stored in the storage unit 73. The setting value of the engine 32 is set (S80). Thereafter, the microcomputer 75 controls the scaler 30 to display an image from the third source 13 (S90).

As described above, the display apparatus 100 of the present invention continuously determines and updates / stores video format information of each of a plurality of video signals input from an external source. Accordingly, the display apparatus 100 does not count the vertical / horizontal synchronization signal of the image signal input from the switched external source and determines the appropriate image format information according to the switched external source. The setting value of the scaling engine 32 suitable for the video signal of the source can be quickly set.

Although some embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that the embodiments may be modified without departing from the spirit or spirit of the invention. .

As described above, according to the present invention, there is provided a display apparatus capable of continuously determining / storing video format information of each of a plurality of input video signals, thereby shortening a mute time when switching an external source.

Claims (5)

A display apparatus comprising a selection output unit for outputting any one of a plurality of input video signals and a scaling unit for processing a video signal from the selection output unit, A user input unit which selects an image signal for display; A synchronization signal counter configured to receive and count a synchronization signal for the video signal selected by the user input unit from the selection output unit; A counting unit continuously counting each sync signal corresponding to each of the plurality of input image signals; Based on the counting result of the counting unit, the video format information corresponding to the counting result of each sync signal is stored for each video signal, and when the video signal is selected through the user input unit, the sync signal counter is used for the sync signal. And a controller configured to receive a counting result and set a setting value of the scaling unit in accordance with previously stored video format information corresponding to the selected video signal. The method of claim 1, The counting unit, And an auxiliary selection output unit for sequentially outputting a synchronization signal corresponding to each of the plurality of input image signals in a predetermined order, and an auxiliary counter for counting the respective synchronization signals output from the auxiliary selection output unit. Display device characterized in that. The method of claim 2, The control unit, A storage unit for storing the video format information for each video signal, and video format information corresponding to a counting result of each sync signal sequentially output from the auxiliary counter as video format information for each video signal, and And a microcomputer for setting a setting value of the scaling unit according to the image format information corresponding to the selected image signal among the image format information of each image signal when the image signal is selected through a user input unit. The method of claim 3, The microcomputer, And the auxiliary selection output unit to sequentially output each synchronization signal corresponding to each of the plurality of input image signals in a predetermined order. The method of claim 4, wherein The microcomputer, And when the video signal is selected through the user input unit, controlling the selection output unit to output the selected video signal.

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