JP2011139249A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display device which automatically optimizes a plurality of image inputs, and optimally arranges and concurrently displays a plurality of signal inputs. <P>SOLUTION: Based on outputs of a first input signal processing portion 3 and a second input signal processing portion 4, a format discriminating portion 5 calculates a resizing rate of an input image signal. A first image signal calculating portion 6 and a second image signal calculating portion 7 perform resizing at an optimal rate, based on the resizing rate from the format discriminating portion 5. An image synthesizing portion 8 synthesizes the output signals of the first image signal calculating portion 6 and the second image signal calculating portion 7 for output to a display device 9. The display device 9 thus concurrently displays the plurality of signal inputs at the optimal rate. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device having a plurality of video input terminals such as analog components, SDI, DVI, and HDMI.

  In recent video monitors, input terminals have been diversified, and in particular, monitors equipped with a plurality of digital input terminals such as SDI, DVI, and HDMI have been standardized. Also, with the development of video signal processing LSIs, it has become possible to simultaneously display video from a plurality of input terminals. However, because there are multiple input terminals, when a new signal source is connected to the input terminal or when a signal source that has already been connected and has not been activated is activated, the video output from those signal sources In order to see the signal, it was necessary to manually select the input terminal by manually switching the input of the video monitor.

  In addition, in the mode in which images from a plurality of input terminals are displayed at the same time, it is necessary to perform a more complicated operation manually. In order to solve such a problem, the presence / absence of a signal at the input terminal is detected to switch to the two-screen display mode (for example, refer to Patent Document 1), the state of the signal at the input terminal is stored, A switch to newly input signal input (for example, see Patent Document 2) is disclosed.

JP-A-7-154716 JP 2001-346101 A

  However, in the above conventional configuration, video signals (SD, HD, etc.) having various resolutions inputted from a plurality of input terminals cannot be displayed at an optimum ratio at the same time, and high resolution video is also low resolution video. However, it has a problem that it can be displayed simultaneously only in the same size or a fixed ratio.

  The present invention solves the above-described conventional problems, and an object thereof is to provide a display device that automatically optimizes a plurality of video inputs and simultaneously displays a plurality of input signals at an optimum ratio.

  In order to solve the above-described conventional problem, at least two input video signals are input, and the display device synthesizes and displays the input video signals, and includes at least two input signal processing units that process the input video signals; Based on the output of the input signal processing unit, the format of the input video signal is determined, and based on the ratio calculated by the format determination unit and the format determination unit that calculates the ratio when resizing the input video signal, A video signal calculation unit for resizing the output signal of the input signal processing unit, a display device for displaying the video signal, and an output signal of the video signal calculation unit based on a display size of the display device, and the display device And a video composition unit for outputting to the video.

  According to the display device having the above configuration, the presence / absence and format of the video signal input to each input terminal is automatically recognized, the display size of each signal is adjusted according to the number of input signals and the format, and a plurality of input signals are optimized. Can be displayed simultaneously in size.

FIG. 2 is a block diagram illustrating a structure of a display device in Embodiment 1. FIG. 5 shows an example of a display screen in Embodiment 1 FIG. 7 is a block diagram illustrating a structure of a display device in Embodiment 2. FIG. 7 is a block diagram illustrating a structure of a display device in Embodiment 3. FIG. 9 is a block diagram illustrating a configuration of a display device according to a modification of the third embodiment.

  Embodiments will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is a block diagram illustrating a configuration of a display device according to Embodiment 1. The display device receives video signals from the first video signal source 1 and the second video signal source 2. The display device includes a first input signal processing unit 3, a second input signal processing unit 4, a format determination unit 5 that calculates the format and resizing ratio of the input signal, and a first input signal processing unit 3. A first video signal calculation unit 6 for resizing the video signal from the second input signal processing unit 7, a second video signal calculation unit 7 for resizing the video signal from the second input signal processing unit 4, and a video signal for a display device. And a display device 9 such as an LCD (Liquid Crystal Display).

  The first video signal source 1 and the second video signal source 2 are devices that output video signals such as HD (High Definition) and SD (Standard Definition) such as BD players, CS / BS tuners, movie cameras, and digital cameras. It is. The first video signal source 1 and the second video signal source 2 may be anything as long as they output video signals. Further, the video signal is not limited to HD or SD, and may have any resolution and any signal format.

  The first input signal processing unit 3 and the second input signal processing unit 4 receive the video signals from the first video signal source 1 and the second video signal source 2, respectively, and perform synchronization separation, AD conversion, serial- Processing such as parallel conversion, color space conversion, and clock reproduction is performed, and a synchronization signal, a video valid area determination signal, and a digital video signal are output to the first video signal calculation unit 6 and the second video signal calculation unit 7, respectively. The first input signal processing unit 3 and the second input signal processing unit 4 also output a synchronization signal, an interlace / progressive determination signal, a video effective area determination signal, and the like to the format determination unit 5.

  The format discriminating unit 5 discriminates the video signal formats of the first video signal source 1 and the second video signal source 2 from the output signals of the first input signal processing unit 3 and the second input signal processing unit 4. The resizing rate is calculated from the total number of pixels, and the result is output to the first video signal calculation unit 6 and the second video signal calculation unit 7. In addition, the format determination unit 5 determines whether or not there are video signals from the first video signal source 1 and the second video signal source 2 from the outputs of the first input signal processing unit 3 and the second input signal processing unit 4. And if the video signal format of the first video signal source 1 or the second video signal source 2 changes, the resizing rate is recalculated. When there is one video signal input that can be displayed on the display device, the video signal that can be displayed is displayed on the display device 9 at the maximum.

  The first video signal calculation unit 6 and the second video signal calculation unit 7 convert the outputs of the first input signal processing unit 3 and the second input signal processing unit 4 to the resize rate from the format determination unit 5, respectively. Based on this, resizing is performed so that the video composition unit 8 can perform the composition. The resizing rate varies depending on the video signal formats of the first video signal source 1 and the second video signal source 2.

  The video composition unit 8 synthesizes and outputs the outputs of the first video signal calculation unit 6 and the second video signal calculation unit 7 in accordance with the number of pixels of the display device 9.

  The display device 9 displays the video signal output from the video composition unit 8. The display device 9 is not limited to a liquid crystal display, and may be a plasma display or a cathode ray tube (CRT).

  FIG. 2 shows a display screen displayed on the display device 9 when a 1080 / 60P video signal is input as the first video signal source 1 and a 720 / 60P video signal is input as the second video signal source 2. It is an example.

  A specific processing flow of the display device when the video signal is input will be described. A 1080 / 60P signal is input to the first input signal processing unit 3, and a 720 / 60P signal is input to the second input signal processing unit 4. The first input signal processing unit 3 and the second input signal processing unit 4 respectively send a synchronization signal, a video valid area determination signal, and a digital video signal to a first video signal calculation unit 6 and a second video signal calculation unit. 7 and the format discrimination unit 5. 1080 / 60P has 1920 horizontal effective pixels and 1080 effective scanning lines, and 720 / 60P has 1280 horizontal effective pixels and 720 effective scanning lines. In this case, the ratio of the number of pixels of the two input signals is 1920 × 1080: 1280 × 720 = 9: 4. The format discriminating unit 5 takes the square root of the ratio of the number of pixels and calculates a ratio of 3: 2.

  As shown in FIG. 2, when the number of displayable pixels of the display device 9 is 1920 × 1080, the format discriminating unit 5 receives the signal from the first video signal source 1 in the horizontal direction 1920 * 3. / 5 = 1152 pixels, and it is determined that 1920 * 2/5 = 768 pixels are assigned to the signal input from the second video signal source 2 in the horizontal direction. The format discriminating unit 5 is 1152/1920 = 3/5 with respect to the number of horizontal effective pixels and the number of effective scanning lines of the first video signal calculation unit 6 of the signal output of the first input signal processing unit 3, and the second The video signal calculation unit 7 performs a resizing process of 768/1280 = 3/5 on the number of horizontal effective pixels and the number of effective scanning lines of the signal output of the second input signal processing unit 4. The outputs of the first video signal calculation unit 6 and the second video signal calculation unit 7 are combined into a 1920 × 1080 signal by the video synthesis unit 8 and simultaneously displayed at the calculated ratio on the display device 9. The signal input with the aspect ratio of 16: 9 is taken as an example, but the same calculation is performed and displayed for the signal input with other aspect ratios.

  According to this configuration, the format determination unit 5 recognizes the presence / absence and format of the video signal input at each input terminal, and adjusts the display size of each signal according to the number of input signals and the format by performing appropriate resizing. Multiple signal inputs can be resized and displayed simultaneously.

(Embodiment 2)
The display device in Embodiment 2 has a configuration in which video signals are input from three or more video signal sources, and each includes three or more input signal processing units and video signal calculation units. FIG. 3 is a block diagram illustrating a configuration of the display device according to the second embodiment. The same components as those in the first embodiment are given the same names, and the description thereof is omitted.

  There are N video signal sources from the first video signal source 11 to the Nth video signal source 12 (N is an integer of 3 or more) as video signal sources.

  The display device includes N input signal processing units from the first input signal processing unit 13 to the Nth input signal processing unit 14, and from the first video signal calculation unit 16 to the Nth video signal calculation unit 17. N video signal arithmetic units, a format discriminating unit 15, a video synthesizing unit 18, and a display device 19.

  The format discriminating unit 15 receives N output signals from the first input signal processing unit 13 to the Nth input signal processing unit 14 and outputs N signals from the first video signal source 11 to the Nth video signal source 12. The format of each video signal is discriminated, the resizing rate is calculated from the total number of pixels of each video signal, and the result is calculated from the first video signal calculation unit 16 to the Nth video signal calculation unit 17. Output to the video signal calculation unit.

  The video composition unit 18 converts the N video signals output from the N video signal calculation units from the first video signal calculation unit 16 to the Nth video signal calculation unit 17 to the number of pixels of the display device 19. Combine and output.

  According to this configuration, the format determination unit 15 recognizes the presence / absence and format of the video signal input to each input terminal, and adjusts the display size of each signal according to the number of input signals and the format by performing appropriate resizing. Then, multiple signal inputs can be resized and displayed simultaneously.

(Embodiment 3)
The display device in Embodiment 3 is configured to include three or more display devices. FIG. 4 is a block diagram illustrating a configuration of the display device according to the third embodiment. The same components as those in Embodiments 1 and 2 are given the same names, and description thereof is omitted.

  The display device includes N display devices from the first display device 29 to the Nth display device 30. The display device appropriately arranges N display devices, and the N display devices constitute one display screen. For example, when the number of displayable pixels of one display device is 1920 × 1080 and three display devices are arranged side by side, the display device may constitute one display screen having the number of pixels of 5760 × 1080. it can.

  The video synthesis unit 28 outputs N video signals output from the N video signal calculation units from the first video signal calculation unit 26 to the Nth video signal calculation unit 27 from the first display device 29. The signals are synthesized and output in accordance with the number of pixels of one screen composed of N display devices up to the Nth display device 30.

  In the first to third embodiments, the displayable pixel count of each display device is 1920 × 1080, but other displayable pixel counts may be used.

  In the first to third embodiments, the configuration including the display device has been described. As a modification of the third embodiment, as illustrated in FIG. 5, instead of the first to Mth display devices 49 to 50. You may provide the 1st-Pth signal output terminal 51-52.

  The display device according to the present embodiment automatically recognizes the presence / absence and format of a video signal at each input terminal, adjusts the display size of each signal according to the number and format of input signals, and optimizes a plurality of signal inputs. Simultaneous display, it is possible to quickly confirm a plurality of video signals, and it is useful as a video monitor in the medical, broadcasting and editing fields.

1, 11, 21, 41 First video signal source 2 Second video signal source 3, 13, 23, 43 First input signal processor 4 Second input signal processor 5, 15, 25, 45 Format Discrimination unit 6, 16, 26, 46 First video signal calculation unit 7 Second video signal calculation unit 8, 18, 28, 48 Video synthesis unit 9, 19 Display device 12, 22, 42 Nth video signal source 14, 24, 44 Nth input signal processing unit 17, 27, 47 Nth video signal calculation unit 29, 49 First display device 30 Nth display device 50 Mth display device 51 First signal output Terminal 52 Pth signal output terminal

Claims (3)

A display device that receives at least two input video signals and synthesizes and displays the input video signals,
At least two input signal processing units for processing the input video signal;
A format determination unit that determines the format of the input video signal based on the output of the input signal processing unit, and calculates a ratio when the input video signal is resized;
Based on the ratio calculated by the format discriminating unit, a video signal arithmetic unit that resizes the output signal of the input signal processing unit,
A display device for displaying video signals;
A video synthesis unit that synthesizes an output signal of the video signal calculation unit based on a display size of the display device, and outputs to the display device;
A display device comprising:   The display device according to claim 1, comprising at least two display devices. A signal output unit that outputs the signal synthesized by the video synthesis unit,
The display device according to claim 1, further comprising:

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