JP5102971B2 - Display device - Google Patents

Description

  The present invention relates to a display device that can display a plurality of images (including videos), and more particularly, to a display device that displays images in a passenger compartment of a vehicle.

  In recent years, with the advancement of digital technology and communication technology, a wide variety of in-vehicle electronic devices have been developed. In particular, an image recorded on a recording medium such as a CD-ROM or DVD using a display such as an LCD, such as a navigation system, a DVD (Digital Versatile Disk) player, and a television receiver, or an image of a television broadcast. Display devices capable of displaying the above have become widespread.

  In recent years, there is also an in-vehicle device in which two display devices are connected as a vehicle is upgraded or enlarged. For example, by installing one display device between the driver seat and the passenger seat and installing the other display device in front of the rear seat, not only the driver and passenger in the passenger seat, but also the passenger in the rear seat In addition, various information displayed on the display device can be viewed.

  For example, Patent Document 1 includes a device recognition unit that recognizes an operation device and an image signal output unit that outputs an image signal corresponding to the operation device. By operating any operation device, the rear seat of the vehicle An in-vehicle display device that can be easily operated by a passenger is described.

Conventionally, there is a vehicle-mounted display that can individually display a plurality of images and then configure and display the images after the image processing in the horizontal direction.
Japanese Patent Laid-Open No. 2004-317412

  However, in such a conventional in-vehicle display device, when the image 1 and the image 2 to be displayed on the two screens are simply synthesized and displayed on the two screens, the aspect ratio is lost and the manner of the collapse is different for each image. For this reason, there is a problem in that the image displayed on the two screens is uncomfortable.

  For example, with the increase in size and definition of an on-vehicle display device, it is possible to display two or more display screens on the display device. DVD images can be reproduced on the display screen.

  FIG. 26 is a diagram illustrating a display example of a display device capable of displaying a plurality of images in the vehicle interior of the vehicle.

  In FIG. 26B, reference numeral 10 denotes a rear seat display device installed in the vehicle interior of the vehicle, and the display device 10 includes a horizontally long display panel 11 of 480 dots vertically × 1600 (800 + 800) dots horizontally. FIG. 26A shows an image 1 with a resolution of 640 × 480 and an image 2 with a resolution of 1280 × 720 displayed on the landscape display panel 11.

  Now, as shown in FIG. 26B, when images 1 (resolution 640 × 480) and image 2 (resolution 1280 × 720) are displayed side by side on the screens 21 and 22 of the horizontally long display panel 11, the screen 21 , 22, the resolution of the image 1 and the image 2 is different. In the example of FIG. 26, the image 1 displayed on the screen 21 is displayed with a slightly compressed top and bottom, and the image 2 displayed on the screen 22 is displayed with the left and right compressed. In particular, in this example, since the compression directions of the image 1 displayed on the screen 21 and the image 2 displayed on the screen 22 are opposite to each other in the vertical and horizontal directions, There is considerable discomfort.

  The present invention has been made in view of this point, and an object of the present invention is to provide a display device capable of displaying an image without a sense of incongruity when a plurality of images are combined and displayed.

The display device according to the present invention is installed in a vehicle interior of a vehicle and displays a display means for displaying an image on a display screen, a resolution detection means for detecting the resolution of the first and second image inputs, and detection by the resolution detection means. Based on the resolution information, the vertical resolution of the first image and the vertical resolution of the second image are combined and combined while maintaining the aspect ratio of both, and the horizontal resolution of the combined image is displayed on the display means. A resolution conversion unit that performs resolution conversion so as to match the horizontal resolution and a screen combination unit that combines the first and second images subjected to the resolution conversion are arranged.

  According to the present invention, it is possible to display an image without a sense of incongruity when a plurality of images are combined and displayed.

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

(Embodiment 1)
FIG. 1 is a diagram showing an external configuration of a display device according to Embodiment 1 of the present invention, and FIG. 2 is a schematic view of a display device installed at the rear of a vehicle as viewed from above. This embodiment is an example applied to a display device for a rear seat of a vehicle as a display device capable of displaying a plurality of images.

  1 and 2, reference numeral 100 denotes a display device for a rear seat installed in the passenger compartment of the vehicle, 200 denotes a rear seat on which viewers A and B who view the display screen of the display device 100 sit, A seating sensor 302 is installed in the rear seat 200 and detects the seating state of the viewers A and B.

  The display device 100 is composed of a large horizontally long LCD panel or the like, and is installed at a place where the viewers A and B sitting on the rear seat 200 can see. As an installation location where a person sitting on the back seat can also enjoy images, for example, it is fixedly installed near the center of the ceiling in the vehicle interior. The display device 100 is configured by an ultra-wide LCD display that is not used in a normal display device. The numerical value in FIG. 1 is an actual size example, and the unit is mm. It goes without saying that if the LCD panel is made larger, it will be easier for the person sitting in the back seat to see the image, but it should not block the rear view from the driver's point of view. As one of them, an ultra-wide LCD display for in-vehicle use is newly developed and adopted this time. The wide LCD display is also particularly suitable for displaying two or more screens side by side. For example, a television tuner, a VTR player, a DVD (Digital Versatile Disk) player, an image playback device such as a car navigation system is connected to the display device 100, and the viewers A and B in the rear seat enjoy various images and sounds. be able to. In FIG. 1, the display device 100 receives an image source 1 (hereinafter referred to as “image 1”) from an image input terminal 101 including, for example, a D terminal, and an image source 2 (hereinafter referred to as “image 2”). And an operation unit 120 having a one-screen display button for image 1, a one-screen display button for image 2, a two-screen display button, and an automatic detection button.

  The image input terminals 101 and 102 are image input terminals that are provided in the display device 100 main body (for example, the lower part of the housing) and input an image source. Any input terminal may be used as long as it can input an image signal, for example, a D terminal. The present invention can be similarly applied to any terminal that can input an image signal through a transmission path capable of transmitting an image, such as an RCA composite terminal, an HDMI terminal, an analog RGB terminal, a DVI terminal, and a USB terminal.

  The operation unit 120 includes various buttons and switches in addition to four buttons capable of distinguishing “one-screen display of image 1”, “one-screen display of image 2”, “two-screen display”, and “auto-detection”. . For example, operations such as television channel switching, DVD playback, volume adjustment operations, and the like are performed using the corresponding buttons on the operation unit 120. Although not shown in the figure, the sound accompanying the display image of the display device 100 installed for the rear seat is output to a speaker in the vehicle cabin, headphones or earphones worn by the rear seat passengers A and B, and the like.

  As the installation mode of the display device 100, there are various modes such as hanging on the ceiling in the vehicle, embedding in the headrest of the front seat and the rear surface of the front seat, and placing on the console box or the floor surface. In any case, the main premise of installation is not to obstruct the driver's rear view. A person sitting in the back seat performs operations such as selection of the type of reproduced image, channel switching, screen angle and position adjustment, volume adjustment, and the like using the operation buttons of the operation unit 120.

  Seating sensors 301 and 302 are seating sensors including contact switches or the like provided on the rear seats of the vehicle. When seated in the seat, a seating detection signal is generated and transmitted to the display device 100 as seating state information. . The seating sensors 301 and 302 detect a seating position of each occupant by arranging a plurality (two in the present embodiment) in the longitudinal direction of the rear seat 200. Needless to say, three or more seating sensors 301 and 302 may be provided. Also, instead of a seating sensor consisting of a contact switch or the like, a pressure sensor using a piezoelectric element, a weight sensor, a human body detection sensor by detecting a radiation temperature in the vehicle interior, a monitoring camera for monitoring the state of the vehicle interior with an image, etc. It may be used. Further, the seating sensor 301 may be a switch (for example, a contact switch) installed in the seat belt wearing part, and detects the presence or absence of the seating of the occupant (viewer) A on the left side of the seat by detecting the presence or absence of the seat belt. To do. Similarly, the seating sensor 302 may be a switch installed in the seat belt mounting portion, and detects the presence / absence of seating of the passenger (viewer) B on the right side of the seat by detecting the presence / absence of the seat belt mounting.

  FIG. 3 is a block diagram showing a configuration of the display device 100.

  In FIG. 3, the display device 100 is formed of a microprocessor and controls the display of the entire device. In addition, the display device 100 refers to 2 by resolution conversion with reference to source resolution information from the resolution detection units 550 and 560 and various setting information from the storage unit 510. A control unit 500 that performs screen composition processing to control image composition of the two-screen composition unit 590, a control unit that is executed by a microprocessor, and a storage unit 510 that includes various setting information for display control; An operation unit 120 that outputs operation information such as pressing of a button switch, a viewer position reading unit 520 that includes the seating sensors 301 and 302 and outputs detected viewer position information Ip, and an image input for inputting an image 1 Terminal 101, image input terminal 102 for inputting image 2, and resolution of image 1 input to image input terminal 101 , A resolution detection unit 550 (resolution detection unit <1>), a resolution detection unit 560 (resolution detection unit <2>) that detects the resolution of the image 2 input to the image input terminal 102, and an image input terminal 101. The image processing unit 570 (image processing unit <1>) that processes the image signal Si1 input to the image input according to the image processing parameter Vc1, and the signal processing of the image signal Si2 input to the image input terminal 102 according to the image processing parameter Vc2. The image processing unit 580 (the image processing unit <2>) and the post-processing image signals So1 and So2 of the image processing units 570 and 580 based on the control signal of the control unit 500 are screen-synthesized, and the screen-synthesized display image signal Sc The two-screen composition unit 590 for outputting and the display panel 110 for displaying the display image signal Sc output from the two-screen composition unit 590 are configured. Although not shown, a loudspeaker is provided. In addition, operation by voice input is also possible by providing a microphone for inputting voice, a voice signal processing unit that digitally processes a reception signal and a voice signal input from the microphone, and a voice recognition unit.

  The display panel 110 is composed of a horizontally long LCD display having a dot matrix configuration. Instead of the LCD display, an organic EL (Electro Luminescence) display device, a PDP (Plasma Display Panel) device, a CRT display device, a projector display device, or the like can be used. The display panel 110 displays various screens for viewers in the backseat, such as icons indicating the operating state of the display function. In the remote control function mode and the video output function mode, various operation information and a volume adjustment GUI (Graphical User Interface) are displayed.

  The operation unit 120 inputs a remote control, an escutcheon button, a viewer position setting by an in-vehicle LAN (Local Area Network), and an ON / OFF setting of screen display processing by an image source.

  The control unit 500 is composed of a microprocessor, executes two-screen composition processing by resolution conversion, which will be described later with reference to FIG. 9, acquires source resolution information from the resolution detection units 550 and 560, and performs various settings from the storage unit 510. Referring to the information, obtain the enlargement / reduction ratio according to the resolution of the source, further read the resolution of the display panel 110 from the storage unit 510, calculate the black pixel insertion position / number of insertions, and instruct the two-screen composition unit 590 Control. In particular, based on the source resolution information from the resolution detectors 550 and 560, the difference between the horizontal and vertical aspect ratio of the image 1 and the horizontal and vertical aspect ratio of the image 2 is less than or equal to a predetermined value. Resolution conversion processing for converting the resolution of the image 2 is performed.

  The storage unit 510 includes a resolution-enlargement / reduction table 510 a that stores the resolution of the display panel 110 and stores an enlargement / reduction ratio corresponding to the resolution, and is referred to by the control unit 500. The storage unit 510 includes a ROM that stores control programs, fixed data, and the like, and a semiconductor memory such as a RAM that is a working storage area of the microprocessor. Further, the external memory may be provided with a storage medium such as an SD card or HDD. The ROM is a read-only semiconductor memory that stores fixed data such as a program and display control data required when the control unit 500 operates. The RAM is used as a so-called working memory that temporarily stores data related to screen display processing by an image source, calculation results, and the like. A program processed by the display device 100 is developed and executed in this RAM. Further, a part of the RAM is composed of an electrically erasable programmable ROM (EEPROM) which is an electrically rewritable nonvolatile memory, and various specifications in the display device 100 can be changed by changing a program written in the EEPROM. Can do.

  The viewer position reading unit 520 reads the voltage value detected by the seating sensors 301 and 302 as the viewer position information Ip. The viewer position reading unit 520 only needs to be able to detect the viewer position. For example, instead of or in combination with the seating sensors 301 and 302, the voltage value of the seat belt detection signal is read, and the CCD (Charge Coupled Device) Digital information readout for image recognition by a camera and an image recognition engine may be used. In addition, manual input using a remote controller, an escutcheon button, and the like, and reading by input to a front seat navigation (driver's seat navigation device) (this input is connected via an in-vehicle LAN) are also included.

  The resolution detection unit 550 (resolution detection unit <1>) detects the resolution of the image 1 input to the image input terminal 101, and sends the detected resolution information Ip1 to the control unit 500. The resolution detection unit 560 (resolution detection unit <2>) detects the resolution of the image 2 input to the image input terminal 102 and sends the detected resolution information Ip2 to the control unit 500.

  The image processing units 570 and 580 include, for example, a DSP (Digital Signal Processor) and the like, acquire the image processing parameters Vc1 and Vc2 from the control unit 500, take in the image signals Si1 and Si2 input to the image input terminals 101 and 102, Signal processing is performed pixel by pixel in accordance with the image processing parameters Vc1 and Vc2.

  The two-screen composition unit 590 synthesizes the processed image signals output from the image processing units 570 and 580 on the screen. Further, the two-screen composition unit 590 obtains the black pixel insertion position and the number of insertions according to the one-screen display instruction from the control unit 500 and inserts it into the enlarged / reduced image, and obtains the horizontal / vertical enlargement / reduction ratio of the resolution of the image. And zoom in and out. In this case, when the black pixel setting is instructed, the set number of black pixels are inserted at the set position, and then the image 1 enlarged / reduced in accordance with the black pixel insertion is combined and displayed on one screen.

  4 to 8 are diagrams illustrating examples of setting storage information stored in the storage unit 510. FIG. A part of the setting storage information is stored as a lookup table.

  FIG. 4 is a diagram showing setting storage information of an image to be displayed on the display. The selected images include a selected image 1 and a selected image 2, and there are CD / DVD playback, TV1, TV2, and external signal input as image sources to be displayed on the display panel 110 in two screens.

  FIG. 5 is a diagram showing the setting storage information of the display output setting displayed on the display. The display output setting selects any one of the selected image 1, the selected image 2, the selected image 1 and the selected image 2, the selected image 2 and the selected image 1. By this display output setting, the selected image 1 and the selected image 2 are set individually or in combination.

  FIG. 6 is a diagram showing display setting setting storage information. One-screen display setting sets a display method for displaying on one screen. One-screen display includes full, normal, seated full, and seated normal. The two-screen display setting sets a display method for displaying on two screens. Two-screen display includes two-screen full, two-screen normal, and two-screen seating full.

  FIG. 7 is a diagram showing setting storage information at the time of one source input, and sets a display method when only one source is input. In the 1-source input setting, either one-screen display or two-screen display is set.

  FIG. 8 is a diagram showing black image setting storage information, in which a black bar insertion method is set. Set the vertical, horizontal, width, and height of the black bar inserted in the gap between image displays.

  Hereinafter, the operation of the display device configured as described above will be described.

  FIG. 9 is a flowchart showing a program for two-screen composition processing by resolution conversion, which is executed by the microprocessor constituting the control unit 500. In the figure, S indicates each step of the flow.

  First, the display resolution (horizontal: DH, vertical: DV) stored in the storage unit 510 in step S1 is referred to, and the display output setting (FIG. 5) stored in the storage unit 510 is referenced in step S2. . Next, the display output setting referred to in step S3 is determined. For the display output setting, there is a selection image 1, a selection image 2, a selection image 1 and a selection image 2, a selection image 2 and a selection image 1, and it is determined which one is set. The selected images 1 and 2 are, for example, CD / DVD playback, TV1, TV2, and external signal input. When the selected image 1 or the selected image 2 is set by the display output setting in the above step S3, the one-source input setting (see FIG. 7) is referred to in step S4, and one-screen display processing is performed in step S5. This flow ends. The one-screen display process is a subroutine that is repeatedly executed during normal times. The two-screen composition unit 590 synthesizes the processed image signals output from the image processing units 570 and 580 in response to the control signal from the one-screen display process.

  If a combination of two image sources (selected image 1 and selected image 2 or selected image 2 and selected image 1) is set in step S3, the resolution (horizontal: H1, vertical) of selected image 1 is set in step S6. : V1) is acquired, and the resolution (horizontal: H2, vertical: V2) of the selected image 2 is acquired in step S7.

  In step S8, is the absolute value of the difference between the vertical resolution V1 of the selected image 1 and the vertical resolution DV of the display larger than the absolute value of the difference between the vertical resolution V2 of the selected image 2 and the vertical resolution DV of the display (| Whether or not V1-DV |> | V2-DV |) is determined. If | V1-DV |> | V2-DV |, variables G and K are set in step S9 according to the following equation (1).

G = V2 / V1
K = DV / V2 (1)
Next, in step S10, the display size of the selected image 1 (horizontal: HS1, vertical: VS1) is calculated according to the following equation (2). In step S11, the display size of the selected image 2 (horizontal: HS2, HS2) is calculated. Vertical: VS2) is calculated and the process proceeds to step S16.

HS1 = G × K × H1
VS1 = G × K × V1 (2)

HS2 = K × H1
VS2 = K × V1 (3)
On the other hand, if | V1-DV | ≦ | V2-DV | is satisfied in step S8, variables G and K are set in step S13 according to the following equation (4).

G = V1 / V2
K = DV / V1 (4)
Next, in step S14, the display size (horizontal: HS2, vertical: VS2) of the selected image 2 is calculated in accordance with the following equation (5), and in step S15, the display size of the selected image 1 (horizontal: HS1, Vertical: VS1) is calculated and the process proceeds to step S16.

HS2 = G × K × H2
VS2 = G × K × V2 (5)

HS1 = K × H1
VS1 = K × V1 (6)
In step S16, the size when combining two screens (horizontal: GH, vertical: GV) is calculated according to the following equation (7).

GH = HS1 + HS2
GV = VS1 (7)
Next, in step S17, it is determined whether or not the horizontal size GH of the two-screen composition size is smaller than the horizontal resolution DH of the display (GH <DH). If GH ≧ DH, the following equation (8) is obtained in step S18. In step S19, the display size of the selected image 1 (horizontal: HS1, vertical: VS1) and the display size of the selected image 2 (horizontal: horizontal: HS1, vertical: VS1) and the size at the time of two-screen composition (horizontal: GH, vertical: GV) are calculated, and the process proceeds to step S20.

RS = GH / DH (8)

HS1 = HS1 × RS
VS1 = VS1 × RS
HS2 = HS2 × RS
VS2 = VS2 × RS (9)

GH = HS1 + HS2
GV = VS1 (10)

When the horizontal size GH of the two-screen composition size is smaller than the horizontal resolution DH of the display in step S17 or when each display size is calculated in step S19, the display setting (FIG. 6) 2 is set. With reference to the screen display setting, it is determined in step S21 whether the two-screen display setting is full, seated full, or normal.

  If the two-screen display setting is normal, the number of inserted black pixels (horizontal: BH, vertical: BV) is calculated in accordance with the following equation (11) in step S22.

BH = DH-GH
BV = DV-GV (11)
Next, in step S23, the black image insertion position of the black image setting (FIG. 8) is referenced, and in step S24, black images corresponding to the horizontal black pixel insertion number BH and the vertical black pixel insertion number BV are inserted from this black image insertion position. Then, this flow is finished.

  If the two-screen display setting is full or seated full in step S21, horizontal and vertical enlargement ratios (horizontal: KH, vertical: KV) are calculated in step S25 according to the following equation (12).

KH = GH / DH
KV = GV / DV (12)
Next, in step S26, it is determined whether or not the two-screen display is set. If the two-screen display is not set, the seating display process is performed in step S27 and the present flow is ended. The seating display process is a subroutine for performing display control according to the seating of the viewer based on the viewer position from the viewer position reading unit 520.

  When the two-screen display is set in step S26, the horizontal and vertical directions are interpolated in step S28, and this flow is finished.

  FIG. 10 is a diagram for explaining an example of two-screen synthesis by resolution conversion of the display device 100.

  In FIG. 10C, the display device 100 includes a horizontally long display panel 110 of 480 dots vertically × 1600 (800 + 800) dots horizontally. FIG. 10A shows an image 1 with a resolution of 640 × 480 and an image 2 with a resolution of 1280 × 720 that are displayed on the landscape display panel 110.

  In this embodiment, as a basic idea of the two-screen composition method, (1) the image 1 and the image 2 to be synthesized are combined and then expanded. (2) First determine the frame into which the image is to be fitted, and fit each screen.

(1) Creation of Composite Screen The vertical resolution of image 2 is matched with the vertical resolution of image 1, and the horizontal resolution of image 2 is matched at the combined ratio (steps S1 to S20).

(2) Adjustment to display The horizontal and vertical resolutions of the composite screen are expanded or reduced to match the display resolution for the screen created in (1) above (steps S25 to S28). If a black image is set, the set black image is inserted (steps S21 to S24).

  In this embodiment, two-screen composition is performed by resolution conversion that matches the vertical resolution of image 2 to the vertical resolution of image 1, and image 1 (resolution 640 × 480) and image 2 (resolution 583 × 480) after resolution conversion are performed. Is displayed on two screens. That is, first, the resolution is converted to match the horizontal resolution of the display, and the horizontal and vertical resolutions of the combined screen are expanded or reduced to match the display resolution. Therefore, as shown in FIG. 10B, the change in aspect ratio is substantially the same for both image 1 and image 2. Since the display ratios of the images 1 and 2 give priority to the aspect ratio, the image 2 is larger. This is clearer when compared with the conventional example of FIG.

  Therefore, as shown in FIG. 10 (c), even when images with different resolutions of image 1 and image 2 are combined and displayed, they are displayed side by side in a two-screen combined display because the aspect ratio does not collapse. The displayed images 1 and 2 are natural displays.

  As described above, according to the present embodiment, the control unit 500 of the display device 100 determines the horizontal and vertical aspect ratios of the image 1 and the image 2 based on the source resolution information from the resolution detection units 550 and 560. When two-screen composition processing is performed by resolution conversion that converts the resolutions of image 1 and image 2 so that the difference between the horizontal and vertical aspect ratios is less than or equal to a predetermined value, a plurality of images are combined and displayed. It is possible to display an image with no sense of incongruity.

  Further, in the present embodiment, since the viewer can set display settings, settings at the time of one source input, black screen settings, and the like by the operation unit 120, an optimal image can be set according to the viewer's request. Can be displayed.

(Embodiment 2)
FIG. 11 is a block diagram showing a configuration of a display device according to Embodiment 2 of the present invention. The same components as those in FIG. 3 are denoted by the same reference numerals, and description of overlapping portions is omitted.

  The display device 600 according to the present embodiment further includes a screen-specific image quality adjustment function in addition to the two-screen composition function by resolution conversion of the display device 100 according to the first embodiment described with reference to FIGS. In order to avoid the convenience and complexity of explanation, FIG. 11 does not show the two-screen composition function unit by resolution conversion such as the resolution detection units 550 and 560 and the image processing units 570 and 580 shown in FIG. Only the image quality adjustment function for each screen, which is a feature of, is described.

  In FIG. 11, the display device 600 performs image quality adjustment control for each screen instructing image quality adjustment units 630 and 640 on edge enhancement parameters Op1 and Op2 such as edge enhancement and gamma suitable for each image, and 2 by resolution conversion. A control unit 610 that controls the image composition of the two-screen composition unit 590 by performing screen composition processing, a storage unit 620 that includes a semiconductor memory, and an image quality adjustment that adjusts the image quality of the image 1 input to the image input terminal 101 Based on the control signal of the control unit 610, the image quality adjustment unit 640 (image quality adjustment unit <2>) for adjusting the image quality of the image 2 input to the image input terminal 102, the image quality adjustment unit <1>. A two-screen composition unit 590 for synthesizing the processed image signals whose image quality has been adjusted by the image quality adjustment units 630 and 640, and outputting a synthesized image signal for display; The image quality adjustment unit 650 (image quality adjustment unit <3>) for adjusting the display image signal output from the unit 590 to an image quality suitable for the display, and the display output from the image quality adjustment unit 650 (image quality adjustment unit <3>) And a display panel 110 for displaying the image signal Sc for use.

  FIG. 12 is a diagram illustrating an example of an edge enhancement filter provided for the image quality adjustment by the image quality adjustment units 630 and 640. In FIG. 12, the edge enhancement filter is constituted by a spatial filter weighted to the center coordinates in a 3 × 3 region, for example.

  The storage unit 620 further stores the following image quality adjustment setting information in addition to the storage information of the storage unit 510 of FIG.

  FIG. 13 is a diagram illustrating setting storage information of image quality adjustment settings. Image quality adjustment settings are: contrast, brightness, color, hue for image source CD / DVD, TV1, TV2 and external signal input and CD / DVD, TV1, TV2 and external signal input for each screen 1 and screen 2. , Sharpness, and DCC image quality adjustment values are set.

  Hereinafter, the operation of the display device configured as described above will be described.

  FIG. 14 is a diagram for explaining a problem at the time of two-screen composition.

  FIG. 14A shows a display example of image 1 and image 2 to be synthesized on two screens, and FIG. 14B shows the image 1 and image 2 shown in FIG. is there. As can be seen from FIG. 14B, there is a considerable difference between the image 1 and the image 2 viewed in terms of pixel values.

  FIG. 14C shows a display example when image quality adjustment such as edge emphasis (filter processing) is performed after the image 1 and the image 2 shown in FIG. From the pixel values shown in FIG. 14D, it can be seen that image 1 and image 2 are edge-enhanced. However, as shown in FIG. 14C, when image quality adjustment such as edge emphasis (filtering) is performed after the two screens are combined, the image is affected by other images around the boundary of the image, resulting in a sense of incongruity.

  FIG. 15 is a flowchart showing a screen-by-screen image quality adjustment processing program, which is executed by the microprocessor constituting the control unit 610. In the figure, S indicates each step of the flow.

  First, in step S31, the display output setting (FIG. 5) stored in the storage unit 620 is referred to, and the display output setting referred to in step S32 is determined. For the display output setting, there is a selection image 1, a selection image 2, a selection image 1 and a selection image 2, a selection image 2 and a selection image 1, and it is determined which one is set. The selected images 1 and 2 are, for example, CD / DVD playback, TV1, TV2, and external signal input. If the selected image 1 is set by the display output setting in step S32, the selected image 1 in the selected image setting (FIG. 4) is referred to in step S33, and whether or not the user setting is changed in step S34. Determine. If there is a user setting change, the edge enhancement level of the selected image 1 is updated in step S35 and the process proceeds to step S36. If there is no user setting change, the process proceeds to step S36 as it is.

  In step S36, the edge enhancement level (FIG. 13) of the selected image 1 is referred to, and edge enhancement is performed in accordance with the edge enhancement level referred to the selected image 1 in step S37, and the process waits in a state waiting for a user adjustment instruction in step S51. The image quality adjustment processing flow for each screen starts when the display device 600 is activated, and is always executed while the display device 600 is powered on.

  If the selected image 2 is set by the display output setting in the step S32, the selected image 2 in the selected image setting (FIG. 4) is referred to in the step S38, and whether or not the user setting is changed in the step S39. Determine. If there is a user setting change, the edge enhancement level of the selected image 2 is updated in step S40 and the process proceeds to step S41. If there is no user setting change, the process proceeds to step S41 as it is.

  In step S41, the edge enhancement level (FIG. 13) of the selected image 2 is referred to, and edge enhancement is performed according to the edge enhancement level referred to the selected image 2 in step S42.

  On the other hand, if a combination of two image sources (selected image 1 and selected image 2 or selected image 2 and selected image 1) is set in step S32, selection of selected image setting (FIG. 4) is selected in step S43. In step S44, it is determined whether or not there is a user setting change with reference to the image 1 and the selected image 2. If there is a user setting change, it is determined in step S45 whether or not the user setting change is for the selected image 1. If the user setting change is for the selected image 1, the image quality adjustment information for the selected image 1 is determined in step S46. When the user setting change is the selected image 2, the image quality adjustment information of the selected image 2 is updated in step S47.

  In step S48, the edge enhancement level (see FIG. 13) of the selected image 1 is referred to, the edge enhancement level of the selected image 1 is referred to, and the edge enhancement is performed in accordance with the edge enhancement level referring to the selected image 1 in step S49. In step S50, edge enhancement is performed in accordance with the edge enhancement level referring to the selected image 2, and the apparatus waits in a user adjustment instruction waiting state in step S51.

  FIG. 16 is a diagram for explaining edge enhancement processing by the edge enhancement filter of FIG. A hatched portion in FIG. 16 indicates a pixel area used by the edge enhancement filter. A1, A2,..., AN represent arbitrary pixel columns on the screen 1, and B0, B1,... BN represent pixel columns on the screen 2 in the same column as A1, A2,. Show. The boundary between the pixel AN of the screen 1 and the pixel B0 of the screen 2 is a screen boundary.

  As shown in FIGS. 16A to 16C, edge enhancement processing is performed pixel by pixel from the A1 pixel to the AN pixel, and edge enhancement processing is performed on the screen 1. In particular, as shown in FIG. 16 (c), the edge enhancement processing of this pixel row is completed up to the AN pixel which is the boundary of the screen, and the edge enhancement processing is applied to the B0 pixel of the screen 2 adjacent to the boundary of the screen. There is nothing. Similarly, as shown in FIGS. 16D and 16E, the edge enhancement processing of the screen 2 is performed separately from the edge enhancement processing of the screen 1. Since the edge enhancement parameters Op1 and Op2 can be set for each of the image 1 and the image 2, the image quality is individually adjusted for each screen.

  FIG. 17 is a diagram showing a two-screen composition example by image quality adjustment for each screen. FIG. 17A is a display example of image 1 and image 2 synthesized on two screens, and FIG. The image 1 and the image 2 shown in a) are viewed as pixel values from the horizontal position.

  As can be seen by comparing the pixel values in FIG. 17B and the pixel values in FIG. 14D, in this embodiment, edge enhancement is appropriately performed on each screen, and the periphery of the boundary. Therefore, there is no sense of incongruity at the image boundary as shown in FIG. FIG. 17A shows a two-screen composition example in which a sense of incongruity does not occur at the boundary and the image quality can be optimally adjusted for each screen.

  In this embodiment, the image quality is adjusted individually for each screen and then the two screens are combined. However, any image can be adjusted as long as the image quality is adjusted for each screen. For example, the image quality can be specified by specifying the left half area of the combined screen. It is also possible to adjust the image quality by adjusting and then specifying the right half area.

(Embodiment 3)
In the present embodiment, adjustment between an in-vehicle display device and a front seat navigation (driver's seat navigation system) will be described.

  FIG. 18 is a diagram showing the connection between the front seat navigation (Navi) and the rear seat display device (RSE). As shown in FIG. 18, a navigation screen and an image are transmitted from Navi to RSE, and RSE can display the navigation screen. However, a problem peculiar to in-vehicle devices is that the characteristics of the image system and the navigation image system are different between the Navi and the RSE. For example, the image system is affected by the image sensor and is not related to the display to be displayed. Further, the navigation system has specifications according to the characteristics of the Navi display at the front, and the characteristics are different from those of the rear display of the rear seat display device.

  FIG. 19 is a diagram illustrating a display example of images on the front navigation and the rear display.

  FIG. 19A is an image of the front navigation, and is image data optimized on the display of the front navigation. FIG. 19B is a display example in which the image data of the front navigation is displayed as two screens with the image 2 on the rear display. If the image of the front navigation is displayed as it is on the rear display, a color shift or the like occurs due to a difference in display characteristics.

  In the present embodiment, image quality adjustment for each navigation screen / RSE screen is realized.

  The hardware configuration of the display device according to this embodiment is the same as that in FIG. However, the storage unit 620 of the display device 600 of FIG. 11 stores the following image quality adjustment setting information.

  20 to 23 are diagrams showing setting storage information of image quality adjustment settings for each navigation screen / RSE screen. FIG. 20 shows TV, FIG. 21 shows DVD, FIG. 22 shows Navi, and FIG. Indicates. The setting items for image quality adjustment settings include contrast, brightness, color gain, hue, and gamma, and the setting values differ for TV, DVD, Navi, and VTR.

  Hereinafter, the operation of the display device configured as described above will be described.

  FIG. 24 is a flowchart showing a program for image quality adjustment processing for each navigation screen / RSE screen, and is executed by the microprocessor constituting the control unit 610. In the figure, S indicates each step of the flow.

  First, it is determined whether or not there is an adjustment instruction for the image in step S61. If there is no adjustment instruction for the image, the image quality adjustment information for the display is updated in step S62, and the image quality adjustment information for the display is displayed in step S63 (FIG. 13). In step S64, the display image quality adjustment processing is performed, and the process waits in a user adjustment instruction waiting state in step S86. Note that the image quality adjustment processing flow for each navigation screen / RSE screen starts when the display device 600 is activated, and is always executed while the display device 600 is powered on.

  When there is an adjustment instruction for the image in step S61, the display output setting (FIG. 5) stored in the storage unit 620 is referred to in step S65, and the display output setting referred to in step S66 is determined. For the display output setting, there is a selection image 1, a selection image 2, a selection image 1 and a selection image 2, a selection image 2 and a selection image 1, and it is determined which one is set. The selected images 1 and 2 are, for example, CD / DVD playback, TV1, TV2, and external signal input. If the selected image 1 is set by the display output setting in the above step S66, the selected image 1 in the selected image setting (FIG. 4) is referred to in the step S67, and whether or not the user setting is changed in the step S68. Determine. If there is a user setting change, the image quality adjustment information of the selected image 1 is updated in step S69, the image quality adjustment information (FIGS. 20 to 23) of the selected image 1 is referenced in step S70, and the selected image 1 is selected in step S71. The image quality adjustment process is performed, and the process waits in a user adjustment instruction waiting state in step S86. If there is no user setting change, the process directly proceeds to step S86.

  If the selected image 2 is set by the display output setting in the above step S66, the selected image 2 in the selected image setting (FIG. 4) is referred to in the step S72 and whether or not the user setting is changed in the step S73. Determine. If there is a user setting change, the image quality adjustment information of the selected image 2 is updated in step S74, the image quality adjustment information (FIGS. 20 to 23) of the selected image 2 is referenced in step S75, and the selected image 2 is selected in step S76. Image quality adjustment processing is performed, and the process waits in a state of waiting for a user adjustment instruction in step S86. If there is no user setting change, the process directly proceeds to step S86.

  On the other hand, if a combination of two image sources (selected image 1 and selected image 2 or selected image 2 and selected image 1) is set in step S66, selection of selected image setting (FIG. 4) is selected in step S77. With reference to the image 1 and the selected image 2, it is determined whether or not there is a user setting change in step S78. If there is a user setting change, it is determined in step S79 whether the user setting change is for the selected image 1. If the user setting change is for the selected image 1, the image quality adjustment information for the selected image 1 is determined in step S80. In step S81, the image quality adjustment parameter (FIGS. 20 to 23) of the selected image 1 is referred to. In step S82, the image quality adjustment process of the selected image 1 is performed, and the process waits in a state waiting for a user adjustment instruction in step S86.

  When the user setting change is the selected image 2 in step S79, the image quality adjustment information of the selected image 2 is updated in step S83, and the image quality adjustment parameters (FIGS. 20 to 23) of the selected image 2 are referred to in step S84. In step S85, the image quality adjustment processing for the selected image 2 is performed, and the process waits in a user adjustment instruction waiting state in step S86.

  FIG. 25 is a diagram showing a two-screen composition example by image quality adjustment for each navigation screen / RSE screen.

  In the present embodiment, edge enhancement is appropriately performed on each screen, and is not influenced by other images around the boundary, so that there is no sense of incongruity at the boundary of the image as shown in FIG. . FIG. 25 shows an example of a two-screen composition in which a sense of incongruity does not occur at the boundary and the image quality can be optimally adjusted for each screen.

  According to the present embodiment, image data (image 1) directly input to the rear and image data (image 2) optimized for the front display are individually adjusted for image quality such as gamma adjustment and hue adjustment. Therefore, in the in-vehicle display device 600, the two image sources can be viewed with optimum image quality.

  The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. For example, a two-screen display has been described as an example, but the same applies to three or more screens, and the screen layout is not limited to the left and right.

  Moreover, although the example applied to the display device viewed from the rear seat of the vehicle has been described, it may be mounted on another similar vehicle.

  Moreover, although the name “display device” is used in each of the above embodiments, this is for convenience of explanation, and it is needless to say that the display device may be a vehicle-mounted display device, a vehicle-mounted electronic device, or the like.

  Furthermore, the type, number, connection method, and the like of each circuit unit constituting the display device, for example, the input detection unit and the image processing unit, are not limited to the above-described embodiments.

  The display device described above is also realized by a program for causing the display device to function. This program is stored in a computer-readable recording medium.

  The display device according to the present invention is useful as an in-vehicle display device installed in a vehicle cabin. In addition, since it is possible to perform setting based on the viewer position during one-screen and two-screen display and an operation right setting operation, it is useful for convenience. Further, it can be applied to applications such as products having a plurality of display devices including a display unit and an operation unit. In addition to the passenger compartment, it is suitable for a display device having a horizontally long display panel.

The front view which shows the external appearance structure of the display apparatus which concerns on Embodiment 1 of this invention. The schematic diagram which looked at the display apparatus which concerns on the said Embodiment 1 from upper direction The block diagram which shows the structure of the display apparatus which concerns on the said Embodiment 1. FIG. The figure which shows the setting storage information of the image displayed on the display of the display apparatus which concerns on the said Embodiment 1. FIG. The figure which shows the setting storage information of the display output setting displayed on the display of the display apparatus which concerns on the said Embodiment 1. FIG. The figure which shows the setting storage information of the display method of the display apparatus which concerns on the said Embodiment 1. The figure which shows the setting storage information at the time of 1 source input of the display apparatus which concerns on the said Embodiment 1. FIG. The figure which shows the black-screen setting storage information of the display apparatus which concerns on the said Embodiment 1. FIG. The flowchart which shows the program of the 2 screen synthetic | combination processing by the resolution conversion of the display apparatus which concerns on the said Embodiment 1 The figure which shows the example of 2 screen synthesis | combination by the resolution conversion of the display apparatus which concerns on the said Embodiment 1. FIG. The block diagram which shows the structure of the display apparatus which concerns on Embodiment 2 of this invention. The figure which shows an example of the edge emphasis filter with which the image quality adjustment part of the display apparatus which concerns on the said Embodiment 2 is provided for image quality adjustment. The figure which shows the setting storage information of the image quality adjustment setting of the display apparatus which concerns on the said Embodiment 2. FIG. The figure explaining the subject at the time of 2 screen composition of the display apparatus which concerns on the said Embodiment 2. FIG. The flowchart which shows the program of the image quality adjustment process according to screen of the display apparatus which concerns on the said Embodiment 2. The figure explaining the edge emphasis process by the edge emphasis filter of the display apparatus which concerns on the said Embodiment 2. FIG. The figure which shows the 2 screen synthetic | combination example by the image quality adjustment according to screen of the display apparatus which concerns on the said Embodiment 2. FIG. The figure which shows the connection of the display apparatus (RSE) for front seat navigation (Navi) and the backseat to which the display apparatus which concerns on Embodiment 3 of this invention is applied. The figure which shows the example of a display of the image of the front navigation and rear display of the display apparatus which concerns on the said Embodiment 3. FIG. The figure which shows the setting storage information of the image quality adjustment setting according to the navigation screen / RSE screen of the display apparatus which concerns on the said Embodiment 3. FIG. The figure which shows the setting storage information of the image quality adjustment setting according to the navigation screen / RSE screen of the display apparatus which concerns on the said Embodiment 3. FIG. The figure which shows the setting storage information of the image quality adjustment setting according to the navigation screen / RSE screen of the display apparatus which concerns on the said Embodiment 3. FIG. The figure which shows the setting storage information of the image quality adjustment setting according to the navigation screen / RSE screen of the display apparatus which concerns on the said Embodiment 3. FIG. The flowchart which shows the program of the image quality adjustment process according to the navigation screen / RSE screen of the display apparatus which concerns on the said Embodiment 3. FIG. The figure which shows the 2 screen synthetic | combination example by the image quality adjustment according to the navigation screen / RSE screen of the display apparatus which concerns on the said Embodiment 3. FIG. The figure explaining the example of a display of the display apparatus which can display a several image in the vehicle interior of the conventional vehicle

Explanation of symbols

DESCRIPTION OF SYMBOLS 100,600 Display apparatus 101 Image input terminal 102 Image input terminal 110 Display panel 120 Operation part 200 Rear seat 301,302 Seating sensor 500,610 Control part 510,620 Storage part 520 Viewer position reading part 550 Resolution detection part (resolution) Detection part <1>)
560 Resolution detector (resolution detector <2>)
570 Image processing unit (image processing unit <1>)
580 Image processing unit (image processing unit <2>)
590 Two-screen composition unit 630, 640, 650 Image quality adjustment unit

Claims (5)

Display means installed in a vehicle cabin and displaying an image on a display screen;
Resolution detection means for detecting the resolution of the first and second image inputs;
Based on the resolution information detected by the resolution detection means, the vertical resolution of the first image and the vertical resolution of the second image are combined and combined while maintaining the aspect ratio of both, and the combined image Resolution conversion means for performing resolution conversion so that the horizontal resolution matches the horizontal resolution of the display means;
Screen composition means for combining the first and second resolution-converted images side by side;
A display device comprising:   The display device according to claim 1, wherein the resolution conversion unit synthesizes the first image and the second image side by side, and converts the resolution of the combined image so as to match the resolution of the display unit. Said resolution converting means, the vertical resolution of the second image, match the vertical resolution of the first image, performing the conversion of horizontal resolution of the second image based on the ratio of the combined said, claim The display device according to claim 1 or 2. Furthermore, the image processing apparatus includes image quality adjustment means for individually adjusting image quality for the first and second images,
The display device according to claim 1, wherein the screen composition unit synthesizes the first and second images whose image quality has been adjusted.   5. The display device according to claim 4, wherein the image quality adjustment unit adjusts the image quality using at least one image quality adjustment parameter among contrast, brightness, color, hue, and gamma.

Images