JP2024040233A - display device - Google Patents

Abstract

To perform a valid control independence on the presence/absence of an attachment capacitor for a soft start.SOLUTION: A display device mounted onto a vehicle; comprises: a display surface (13); and a display control part (12) that controls a display content of a display screen. The display control part includes: a wobbling processing part that executes a wobbling processing that moves a display position of an image displayed onto the display surface; and a scaling processing part that generates an output image of a first size from an input image and an output image of a second size that is smaller than the first size. In accordance with a situation of a vehicle, the output image of the first or second size is displayed onto the display screen.SELECTED DRAWING: Figure 1

Description

The present invention relates to a display device.

A so-called burn-in may occur in a display screen configured using an organic EL element or the like. Wobbling processing is known as a processing for suppressing burn-in. In the wobbling process, burn-in is suppressed by moving the display position of the image displayed on the display screen (for example, moving it along a figure-eight trajectory over time).

Japanese Patent Application Publication No. 2002-205611 JP 2018-8578 Publication

However, when the wobbling process is performed, a phenomenon occurs in which a part of the output image that should be displayed on the display screen protrudes from the display area and is no longer displayed (hereinafter referred to as image missing) during the wobbling process. Due to the wobbling process, a black image is displayed in areas where image information of the output image no longer exists. Alternatively, in order to avoid displaying a black image, it is necessary to take measures such as adding pixels for wobbling processing to the output image. It should be noted that image loss due to wobbling processing will be explained later.

Although there are many cases where image loss does not actually pose a problem, there are also cases where the negative effects of image loss cannot be ignored depending on the situation.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a display device that contributes to suppressing the harmful effects of image loss caused by wobbling processing.

A display device according to the present invention is a display device mounted on a vehicle, and includes a display screen and a display control section that controls display contents of the display screen, and the display control section controls the display content of the display screen. This is a configuration (first configuration) in which a wobbling process for moving the display position of a displayed image can be executed, and the wobbling process is prohibited depending on the state of the vehicle.

In the display device according to the first configuration, when the state of the vehicle corresponds to a state in which a camera image taken of the outside of the vehicle is displayed on the display screen, the display control unit executes the wobbling process. A configuration (second configuration) that prohibits this may also be used.

In the display device according to the second configuration, when the state of the vehicle corresponds to a state in which the traveling direction of the vehicle is set to the backward direction and the camera image is displayed on the display screen, the display control unit may be a configuration (third configuration) that prohibits the wobbling process.

In the display device according to any of the first to third configurations, the display control unit lowers the brightness of the display screen in a state in which the wobbling process is prohibited, compared to a state in which the wobbling process is not prohibited. A configuration (fourth configuration) may also be used.

Another display device according to the present invention is a display device mounted on a vehicle, and includes a display screen and a display control section that controls display contents of the display screen, and the display control section controls the display a wobbling processing unit that executes wobbling processing to move the display position of the image displayed on the screen; and a scaling processing that generates an output image of a first size or an output image of a second size smaller than the first size from the input image. and a configuration (fifth configuration) in which the output image of the first size or the second size is displayed on the display screen depending on the state of the vehicle.

In the display device according to the fifth configuration, when the state of the vehicle corresponds to a state in which a camera image taken of the outside of the vehicle is displayed on the display screen, the display control section The output image may be displayed on the display screen (sixth configuration).

In the display device according to the sixth configuration, when the state of the vehicle corresponds to a state in which the traveling direction of the vehicle is set to the backward direction and the camera image is displayed on the display screen, the display control unit The configuration may be such that the output image of the second size is displayed on the display screen (seventh configuration).

Still another display device according to the present invention is a display device mounted on a vehicle, and includes a display screen and a display control section that controls display contents of the display screen, and the display control section is configured to A wobbling process for moving the display position of an image displayed on a display screen is enabled, and when the image displayed on the display screen includes a character image, the wobbling process is prohibited depending on the display position of the character image. configuration (eighth configuration).

In the display device according to the eighth configuration, the display control unit may be configured to prohibit the wobbling process when the character image is displayed within a predetermined range from the outer edge of a predetermined display area of the display screen (ninth configuration).

In the display device according to the eighth or ninth configuration, the display control unit is configured to lower the brightness of the display screen in a state where the wobbling process is prohibited than in a state where the wobbling process is not prohibited. 10th configuration).

According to the present invention, it is possible to provide a display device that contributes to suppressing the harmful effects of image loss due to wobbling processing.

1 is an overall configuration diagram of an in-vehicle system according to an embodiment of the present invention. 1 is a schematic top view of a vehicle equipped with an in-vehicle system according to an embodiment of the present invention; FIG. 1 is a diagram showing a part of the interior of a vehicle according to an embodiment of the present invention. FIG. 3 is a diagram showing a relationship between an input image and a predetermined display area according to an embodiment of the present invention. FIG. 2 is an internal block diagram of a display control section shown in FIG. 1. FIG. FIG. 3 is an explanatory diagram of wobbling processing according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of wobbling processing according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of scaling processing according to an embodiment of the present invention. FIG. 3 is a diagram illustrating how image chipping occurs due to wobbling processing according to an embodiment of the present invention. FIG. 7 is a diagram showing an output image of a first size and an output image of a second size according to a second embodiment of the present invention. FIG. 7 is a diagram showing how an output image of a first size is displayed in a predetermined display area according to a second embodiment of the present invention. FIG. 7 is a diagram showing how an output image of a second size is displayed in a predetermined display area according to a second embodiment of the present invention. FIG. 7 is a diagram for explaining an end display area within a display area where an output image is to be displayed according to a fifth embodiment of the present invention. FIG. 7 is a diagram schematically showing the interior of a vehicle according to a sixth embodiment of the present invention. FIG. 7 is a configuration diagram of a front seat unit and a rear seat unit according to a sixth embodiment of the present invention.

Examples of embodiments of the present invention will be specifically described below with reference to the drawings. In each referenced figure, the same parts are given the same reference numerals, and overlapping explanations regarding the same parts will be omitted in principle. In this specification, for the purpose of simplifying the description, symbols or codes that refer to information, signals, physical quantities, parts, etc. are written, and the names of the information, signals, physical quantities, parts, etc. that correspond to the symbols or codes are indicated. May be omitted or abbreviated.

FIG. 1 is an overall configuration diagram of an in-vehicle system SYS according to an embodiment of the present invention. The in-vehicle system SYS includes a display unit 10, a speaker unit 20, an in-vehicle sensor unit 30, and an AV information supply unit 40. FIG. 2 is a schematic top view of the vehicle CR equipped with the in-vehicle system SYS. FIG. 3 shows a part of the interior of the vehicle CR. In the cabin of the vehicle CR, near the driver's seat, a steering wheel 2, a shift lever 3, and an ignition switch 4 are provided as components operated by the driver, and a display screen SCR that can be viewed by the driver is provided. The display screen SCR may be the display screen 13 in the display unit 10, or may be a display screen other than the display screen 13.

The steering wheel 2 is a ring-shaped component that receives a rotational operation by the driver and adjusts the traveling direction of the vehicle CR in accordance with the rotational operation. The shift lever 3 sets whether or not the vehicle CR can travel and the direction of travel of the vehicle CR, and changes the speed of the vehicle CR, based on the driver's operation. The ignition switch 4 specifies supply or non-supply of power to each electrical device of the vehicle CR, and also specifies starting or stopping of the engine of the vehicle CR, based on the driver's operation.

The display section 10, the speaker section 20, the on-vehicle sensor section 30, and the AV information supply section 40 are each connected to an in-vehicle network 50 formed inside the vehicle CR, and can receive arbitrary information and signals via the in-vehicle network 50. Two-way communication between each other is possible, or one-way communication of arbitrary information and signals is possible. As the in-vehicle network 50, CAN (Controller Area Network) or AVCLAN (Audio Visual Communication Local Area Network) can be used. In FIG. 1, only the display section 10, the speaker section 20, the in-vehicle sensor section 30, and the AV information supply section 40 are shown as components connected to the in-vehicle network 50, but there are various other components that are not shown. devices (for example, a power steering system, a brake system, a radar device, a drive recorder) are connected to the in-vehicle network 50.

Here, the vehicle CR is mainly assumed to be a vehicle (such as a car) that can run on a road surface, but the vehicle CR may be any type of vehicle. In the vehicle CR, the direction from the driver's seat toward the steering wheel 2 is defined as "front", and the direction from the steering wheel 2 toward the driver's seat is defined as "rear". The direction perpendicular to the front-rear direction and parallel to the road surface is defined as the left-right direction. The left and right in the left-right direction are the left and right as seen from the driver of the vehicle CR, who is sitting in the driver's seat of the vehicle CR and facing forward.

The display unit 10 includes a display mode setting unit 11, a display control unit 12, and a display screen 13. The display mode setting section 11 and the display control section 12 are composed of a microcomputer, a video integrated circuit, an ASIC (Application Specific Integrated Circuit), and the like.

The display mode setting unit 11 sets the display mode of the display unit 10. There are a plurality of candidate modes as candidates for the display mode of the display section 10, and the display mode setting section 11 sets any one of the plurality of candidate modes as the display mode of the display section 10. Specific examples of the plurality of candidate modes will be described later.

The display control unit 12 controls the display contents of the display screen 13. At this time, the display control section 12 can perform display control on the display screen 13 according to the display mode of the display section 10 set by the display mode setting section 11 (details will be described later). The display control unit 12 can display an image on the display screen 13 based on the image information VI supplied from the AV information supply unit 40. Note that in this embodiment, the term "image information" can be replaced with the equivalent term "video information."

The display screen 13 is an organic EL panel formed by arranging pixel circuits in a matrix, each having an organic EL element (organic electroluminescent element). An organic EL element is an electro-optical element whose brightness is controlled by a current flowing through it. A desired image is displayed on the display screen 13 by causing the organic EL elements of each pixel circuit to emit light or not to emit light under the control of the display control unit 12 .

The speaker section 20 is composed of an acoustic integrated circuit, an ASIC (Application Specific Integrated Circuit), and one or more speakers, and outputs sound based on the acoustic information AI supplied from the AV information supply section 40 (outputs sound waves). . Note that the display unit 10 may have a mechanism that vibrates the display panel including the display screen 13 based on the acoustic information AI. In this case, by vibrating the display panel including the display screen 13 based on the acoustic information AI, a sound (sound wave) representing the acoustic information AI is output from the display panel, and the display panel itself functions as the speaker section 20. (It may be considered that the speaker section 20 is included in the display section 10.)

The on-vehicle sensor section 30 consists of a plurality of sensors installed in the vehicle CR. FIG. 1 shows a shift lever sensor 31 and a vehicle speed sensor 32 as two sensors included in the plurality of sensors.

The shift lever sensor 31 is a sensor that detects the position of the shift lever 3 of the vehicle CR, and is configured using a displacement sensor or the like. The position of the shift lever 3 is set to one of a plurality of positions including a drive position, a reverse position, and a parking position based on the driver's operation. When the shift lever 3 is in the drive position, the vehicle CR moves forward (drives forward) in response to the depression of the accelerator pedal of the vehicle CR, and when the shift lever 3 is in the reverse position, in response to the depression of the accelerator pedal of the vehicle CR. Accordingly, the vehicle CR moves backward (runs toward the rear). When the shift lever 3 is in the parking position, the vehicle CR does not move forward or backward regardless of whether the accelerator pedal of the vehicle CR is depressed. Information indicating the position of the shift lever 3 detected by the shift lever sensor 31 is referred to as shift information. The display unit 10 can acquire shift information via the in-vehicle network 50.

Vehicle speed sensor 32 detects the running speed (moving speed) of vehicle CR. Information representing the traveling speed of the vehicle CR detected by the vehicle speed sensor 32 is referred to as vehicle speed information. The display unit 10 can acquire vehicle speed information via the in-vehicle network 50.

In addition, various sensors mounted on the vehicle CR (for example, a steering sensor, an accelerator sensor, a brake sensor) may also be included in the on-vehicle sensor section 30, and the acquired information of each sensor is transmitted to the display section via the in-vehicle network 50. It's good to be sent to 10th.

The AV information supply unit 40 supplies image information VI to the display unit 10 and audio information AI to the speaker unit 20. Image information VI and audio information AI may be obtained or generated in any manner. In the example of FIG. 1, the AV information supply section 40 is provided with a camera section 41, a navigation section 42, a recording medium 43, a broadcast wave reception section 44, and a communication section 45. The image information VI to be supplied to the display section 10 may be obtained from the camera section 41, the navigation section 42, the recording medium 43, the broadcast wave receiving section 44, or the communication section 45, and the audio information VI to be supplied to the speaker section 20. AI may be acquired from the navigation section 42, the recording medium 43, the broadcast wave receiving section 44, and the communication section 45.

The camera unit 41 consists of one or more cameras installed in the vehicle CR, and each camera installed in the camera unit 41 is referred to as a unit camera. The unit camera is equipped with an imaging element such as a CMOS (Complementary Metal Oxide Semiconductor) image sensor or a CCD (Charge-Coupled Device) image sensor, and an optical system, and photographs within its own field of view (in other words, the photographing area). Image information indicating an image obtained by photographing (that is, an image within the field of view) is generated. The image information generated by the unit camera is hereinafter referred to as camera image information, and the two-dimensional image represented by the camera image information is referred to as a camera image. The unit camera periodically and repeatedly photographs its own field of view at a predetermined photographing frame rate. The photographing frame rate corresponds to the number of times of photographing per second. Although the shooting frame rate is arbitrary, it is, for example, 60 [frames/second]. Camera image information for one frame is periodically generated in a unit camera at an interval equal to the reciprocal of the photographing frame rate. One frame of camera image information represents a camera image as a single still image, and a plurality of frames of camera image information represents a camera image as a moving image. Camera image information may be supplied to the display unit 10 as image information VI.

The camera section 41 is provided with a camera 41R as one of the unit cameras (see FIG. 2). The camera 41R is a rear camera that is outside the vehicle CR and has a field of view in the rear region of the vehicle CR, and is installed at an appropriate location on the body of the vehicle CR. Although it is not clear from FIG. 2, the depression angle of the camera 41R is appropriately set so that the road surface within a predetermined area outside the vehicle CR and on the rear side of the vehicle CR is included in the field of view of the camera 41R. Camera image information generated by the camera 41R may be supplied to the display unit 10 as image information VI.

In addition, in the camera section 41, in addition to the camera 41R as a rear camera, there is a front camera that is outside the vehicle CR and has a field of view in the front side area of the vehicle CR, and a front camera that is outside the vehicle CR and has a field of view in the area on the right side of the vehicle CR. A light camera having a field of view and a left camera having a field of view outside the vehicle CR and in the left side area of the vehicle CR may be provided. Each of the front camera, right camera, and left camera is also a type of unit camera, and camera image information of each unit camera may be supplied to the display unit 10 as image information VI. The camera section 41 may include only one or more arbitrary cameras among the rear camera, front camera, right camera, and left camera. In the present embodiment, hereinafter, only the camera 41R will be focused as a unit camera, and when the term "camera image" and "camera image information" are simply referred to, they refer to the camera image and camera image information based on the photographic results of the camera 41R. .

The navigation unit 42 cooperates with the display unit 10 to execute navigation operations. The navigation unit 42 sets a planned travel route for the vehicle CR from its current location to a destination, and generates a navigation image that is an image in which the planned travel route is superimposed on a map image. When a navigation operation is executed, image information representing the navigation image is supplied to the display unit 10 as image information VI, so that the navigation image is displayed on the display screen 13, and the driver's driving operation to the destination is supported. Ru.

The recording medium 43 is composed of an optical disc or the like that stores image information and audio information that constitute a movie or the like. The image information and audio information stored in the recording medium 43 are supplied to the display unit 10 and the speaker unit 20 as image information VI and audio information AI, so that the video and audio of movies etc. stored in the recording medium 43 are displayed. It is displayed on the section 10 and outputted on the speaker section 20.

The broadcast wave receiving unit 44 extracts image information and audio information included in the television broadcast waves by receiving the television broadcast waves. The image information and audio information based on the TV broadcast waves are supplied to the display unit 10 and the speaker unit 20 as image information VI and audio information AI, so that the video and audio based on the TV broadcast waves are displayed on the display unit 10 and the speaker unit 20. It is outputted by the section 20.

The communication unit 45 can be connected to an information communication network including the Internet via a predetermined mobile communication line, and can perform two-way communication with any device connected to the information communication network. The communication unit 45 can receive image information and audio information from any device connected to the information communication network, and displays the received image information and audio information as image information VI and audio information AI on the display unit 10 and the speaker unit. 20 can be supplied.

In the following, only the image information VI of the image information VI and the audio information AI will be focused on, and the processing related to the image information VI will be explained in detail. Referring to FIG. 4, the two-dimensional image represented by image information VI is referred to as input image II. A predetermined display area _DRW is provided on the display screen 13 as a display area allocated to displaying the input image II. Although the predetermined display area DR _W may be a part of the entire display area of the display screen 13 , it is assumed below that the predetermined display area DR _W is the entire display area of the display screen 13 . Therefore, on the display screen 13, an image that is visible to the user only within the display area _DRW is displayed. The user is a user of the in-vehicle system SYS and an observer of the display screen 13. In the following description, the display on the display screen 13 is understood to refer to the display on the display area _DRW unless otherwise specified.

Assume a two-dimensional image space defined by an X-axis and a Y-axis. The X-axis and Y-axis are orthogonal to each other. The X-axis is parallel to the horizontal direction of the display screen 13 and the display area _DRW , and the Y-axis is parallel to the vertical direction of the display screen 13 and the display area _DRW . The X axis is also parallel to the horizontal direction of any two-dimensional image (including input image II and output image OI described below), and the Y axis is parallel to the horizontal direction of any two-dimensional image (including input image II and output image OI described below). (including) is also parallel to the vertical direction. In the display region _DRW , W _X pixels are arranged along the X-axis direction, and W _Y pixels are arranged along the Y-axis direction. In the display area _DRW , pixels are arranged in a matrix in the X-axis direction and the Y-axis direction. Therefore, the number of pixels forming the display area DR _W is (W _X ×W _Y ). Each of W _X and W _Y has an integer value significantly larger than 2. Although the specific numerical values of W _X and W _Y are arbitrary, for example, (W _X , W _Y )=(1920, 1080) or (W _X , W _Y )=(1280, 720).

FIG. 5 shows a block diagram of a part of the display control section 12. The display control section 12 includes a wobbling processing section 12a, a scaling processing section 12b, and a processing management section 12c.

The wobbling processing section 12a performs wobbling processing under predetermined conditions. The wobbling process is a process of moving the display position of an image displayed on the display screen 13 over time. This movement is independent of the image information VI. That is, during the period in which the wobbling process is executed, even if the image information VI supplied to the display unit 10 remains unchanged, the display position of the image displayed on the display screen 13 is moved over time. So-called burn-in may occur in the display screen 13 configured using organic EL elements. The wobbling process reduces burn-in.

A specific example of wobbling processing will be described with reference to FIGS. 6 and 7. Now, assume that image information VI indicating that the image Iref should be displayed at a predetermined position in the display area _DRW of the display screen 13 is given to the display unit 10. It is assumed that this image information VI remains unchanged over time. The image Iref has a sufficiently smaller image size than the display area _DRW . In this case, when the wobbling process is executed, the display position of the image Iref is continuously and repeatedly centered on a predetermined position in the display area _DRW along a predetermined trajectory over time during the execution period of the wobbling process. be forced to move. In the example of FIG. 7, the predetermined trajectory is a trajectory along the Arabic numeral 8, but the predetermined trajectory can be arbitrarily changed. The movement of the display position of the image Iref may have a constant cycle. Due to the wobbling process, the display position of the center of the image Iref changes by a predetermined wobbling width in each of the X-axis direction and the Y-axis direction. The wobbling width is set to a width that does not make the user feel excessively uncomfortable. The wobbling width may be a width in units of pixels on the display area _DRW (a width in units of the size of one pixel in the X-axis or Y-axis direction), for example, a width of several pixels or a width of 10 This is the width of a pixel.

An enable signal EN _WB is input from the processing management section 12c to the wobbling processing section 12a (see FIG. 5). The enable signal EN _WB is a binary signal that takes an active (for example, high level) or non-active (for example, low level) signal state. The processing management unit 12c can permit or prohibit wobbling processing by controlling the signal state of the enable signal EN _WB . In the wobbling processing unit 12a, wobbling processing is permitted only when the enable signal EN _WB is in an active signal state, and wobbling processing is prohibited when the enable signal EN _WB is in a non-active signal state. Specifically, prohibition of wobbling processing means that execution of wobbling processing is prohibited. When wobbling processing is prohibited, wobbling processing is never performed. Specifically, "wobbling processing is permitted" means that execution of wobbling processing is permitted.

The wobbling processing unit 12a may always perform the wobbling process when the enable signal EN _WB is in an active signal state. Alternatively, the wobbling process may be executed only under specific conditions on the premise that the enable signal EN _WB is in an active signal state. For example, on the premise that the enable signal EN _WB is in an active signal state, the wobbling processing unit 12a starts executing the wobbling process when the input image II remains unchanged for a predetermined period of time or more, and then If there is a change in II, the wobbling process may be terminated.

The scaling processing unit 12b performs scaling processing on the input image II. In the scaling process, the image size of the input image II is converted. Image size conversion is an enlargement or reduction of the image size by geometric transformation. The image size of any image is defined by the number of pixels in the X-axis direction and the Y-axis direction that constitute the image. The same applies to the size of the display area DR _W , and the size of the display area DR _W is defined by the number of pixels in the X-axis direction and the Y-axis direction that constitute the display area DR _W.

FIG. 8 shows the relationship between images before and after scaling processing. Input image II after scaling processing by scaling processing section 12b is referred to as output image OI. The number of pixels in the X-axis direction and the number of pixels in the Y-axis direction in the input image II are represented by _I.sub.X and _I.sub.Y , respectively. The number of pixels in the X-axis direction and the number of pixels in the Y-axis direction in the output image OI are represented by O _X and O _Y , respectively. The input image II (ie, the output image OI) after the scaling process is displayed in the display area _DRW . The scaling processing unit 12b performs scaling processing on the input image II so that the image size of the output image OI corresponds to the size of the display area _DRW .

The processing management unit 12c controls the content of the scaling process by outputting the scaling rate k _SCL to the scaling processing unit 12b (see FIG. 5). The scaling processing unit 12b performs scaling processing according to the scaling rate k _SCL . Here, to simplify the explanation, it is assumed that the input image II, the output image OI, and the display area _DRW have the same aspect ratio. That is, it is assumed that " _IX : _IY = _OX : _OY = _WX : _WY ". The scaling processing unit 12b executes the scaling process so that "O _X = k _SCL x I _X " and "O _Y = k _SCL x I _Y ". _At this time, _typically , for _example , _" ( _O Displayed on _W.

When “(O _X , O _Y )=(W _X , W _Y )”, the image to be displayed can be displayed in the largest size. However, if wobbling processing is performed when “(O _{X ,} O _Y ) = ( _W A phenomenon in which the image is no longer displayed on _W (image loss) occurs. Due to the wobbling process, a black image that is not based on the image information VI is displayed at a portion of the output image OI where image information no longer exists. Alternatively, in order to avoid displaying a black image, it is necessary to take measures such as adding pixels for wobbling processing to the output image OI.

Hereinafter, in a plurality of embodiments, specific operation examples, application techniques, modification techniques, etc. related to control of wobbling processing or scaling processing will be explained. The matters described above in this embodiment apply to each of the following examples unless otherwise specified and unless there is a contradiction. In each embodiment, if there is a matter inconsistent with the above-mentioned matter, the description in each embodiment may take precedence. Further, unless there is a contradiction, matters described in any one of the plurality of embodiments shown below can be applied to any other embodiment (i.e., any two or more of the plurality of embodiments). It is also possible to combine the embodiments).

<<First Example>>
A first example will be explained. In the first embodiment, it is assumed that "(O _X , O _Y )=(W _X , W _Y )" is always satisfied, and wobbling processing is permitted or prohibited depending on the display mode of the display unit 10. Details will be explained below.

As described above, there are a plurality of candidate modes as candidates for the display mode of the display section 10, and the display mode setting section 11 selects one of the plurality of candidate modes as the display mode of the display section 10 (hereinafter simply referred to as display mode). ). Here, it is assumed that the plurality of candidate modes mentioned above include camera image mode, navigation mode, recording medium playback mode, television mode, and internet information browsing mode, and these modes will be taken as examples to enable wobbling processing. Or explain prohibition control.

The user can input a predetermined operation to an operation section (not shown) provided on the in-vehicle system SYS (for example, an operation section provided on the display section 10), and the display mode setting section 11 selects a predetermined operation based on the input predetermined operation. The display mode can be set to any one of the plurality of candidate modes.

When the camera image mode is set to the display mode, camera image information based on the photographing result of the camera section 41 is supplied to the display section 10 as image information VI, and the camera image based on the camera image information is taken as the input image II. As a result, the camera image is displayed on the display screen 13 (specifically, the display area DR _W ).

When the navigation mode is set to the display mode, image information representing the above-mentioned navigation image is supplied to the display unit 10 as image information VI, and the navigation image is set as the input image II, so that the navigation image is displayed on the display screen 13 (details is displayed in the display area DR _W ). When the navigation mode is set to the display mode, the navigation unit 42 executes a navigation operation.

When the recording medium playback mode is set to the display mode, the image information stored in the recording medium 43 is supplied to the display unit 10 as image information VI, and an image (such as a movie etc.) based on the image information stored in the recording medium 43 is displayed. image) is taken as input image II. As a result, an image (an image of a movie, etc.) based on the image information stored in the recording medium 43 is displayed on the display screen 13 (specifically, the display area DR _W ).

When the television mode is set to the display mode, image information based on the television broadcast waves received by the broadcast wave receiving section 44 is supplied to the display section 10 as image information VI, and an image ( The broadcasted image) is taken as the input image II. As a result, an image (broadcast image) based on the image information of the television broadcast wave is displayed on the display screen 13 (specifically, the display area DR _W ).

When the net information browsing mode is set to the display mode, image information received by the communication unit 45 through an information communication network including the Internet is supplied to the display unit 10 as image information VI, and the image information received by the communication unit 45 is supplied to the display unit 10 as image information VI. An image based on the image (such as a web page image) is set as the input image II. As a result, an image (such as a web page image) based on the image information received by the communication unit 45 is displayed on the display screen 13 (specifically, the display area DR _W ).

When the display mode of the display unit 10 set by the display mode setting unit 11 belongs to the prohibited mode, the processing management unit 12c (see FIG. 5) prohibits the wobbling process by making the enable signal EN _WB inactive. However, when it belongs to the non-prohibited mode, wobbling processing is permitted by activating the enable signal EN _WB .

Classification into prohibited modes and non-prohibited modes is performed in consideration of the magnitude of the influence of image chipping caused by execution of wobbling processing. First, at least the camera image mode is classified as a prohibited mode. This is because image loss in the camera image mode obstructs the driver's visibility support and should be avoided from the viewpoint of operational safety of the vehicle CR. In particular, when a driving operation is performed to move the vehicle CR backward with the camera image of the camera 41R (rear camera) shown in FIG. 2 being displayed on the display screen 13, the occurrence of image loss should be avoided as much as possible.

The display mode setting section 11 may set the display mode based on the shift information, and may set the display mode to the camera image mode based on the shift lever 3 being set to the reverse position. It's okay. Alternatively, the display mode setting unit 11 may set the display mode based on the shift information and vehicle speed information, and when the shift lever 3 is set to the reverse position and the speed of the vehicle CR is not zero ( That is, the display mode may be set to the camera image mode (when the vehicle CR is traveling backward).

Navigation mode, recording medium playback mode, television mode, and internet information browsing mode may all be classified as non-prohibited modes. Alternatively, some of the navigation mode, recording medium reproduction mode, television mode, and internet information browsing mode may be classified as prohibited modes, and some other modes may be classified as non-prohibited modes. For example, the edges of images produced by television broadcast waves tend to include things such as the time and subtitles that would be inconvenient if partially hidden through wobbling processing, or things that would make the user feel uncomfortable. Taking this into consideration, the television mode may be classified as a prohibited mode. On the other hand, although it depends on the configuration of the navigation image, even if an image is missing in the display of the navigation image, it is considered that there will be little trouble, so it is possible to classify the navigation mode as a non-prohibited mode.

By permitting or prohibiting the wobbling process according to the display mode as in this embodiment, the problem of image loss due to the wobbling process can be substantially eliminated.

However, when a mode classified as a prohibited mode (camera image mode, etc.) is set to the display mode, wobbling processing is prohibited, so the problem of burn-in remains. Considering this, when a mode classified as a prohibited mode is set as a display mode, the brightness of the display screen 13 is set lower than when a mode classified as a non-prohibited mode is set as a display mode. good. Burn-in is less likely to occur due to the reduction in brightness.

The brightness of the display screen 13 represents the average brightness of the display screen 13 and also represents the average brightness of the display area _DRW (average brightness of the image displayed in the display area _DRW ). The user can specify the first brightness (reference brightness) through an operation on the operation unit (not shown). Alternatively, a fixed first brightness is predetermined. The display control unit 12 sets the brightness of the display screen 13 to the first brightness when a mode classified as a non-prohibited mode is set as a display mode, and sets a mode classified as a prohibited mode as a display mode. When the brightness is set, it is preferable to set the brightness of the display screen 13 to a second brightness lower than the first brightness. The difference between the first and second brightness is arbitrary.

Note that since the actual brightness of the display screen 13 depends on the image information VI, the first brightness and the second brightness refer to the output image OI based on constant and predetermined image information VI on the display screen 13 (display area DR _W ). It can be understood that this represents the brightness of the display screen 13 (display area DR _W ) when displayed on the display screen 13 (display area DR W ). In any case, the second brightness is relatively lower than the first brightness.

<<Second Example>>
A second embodiment will be explained. The matters described in the first embodiment regarding the display mode of the display unit 10, including the example of a plurality of candidate modes, also apply to the second embodiment. However, in the second embodiment, the wobbling process may be always permitted regardless of the display mode of the display section 10 (the enable signal _ENWB may always be active), and instead, the wobbling process may be always enabled regardless of the display mode of the display section 10. The content of scaling processing is variably controlled depending on the mode. Details will be explained below.

The processing management unit 12c can vary the scaling rate _kSCL , and the scaling processing unit 12b converts the input image II into an output image OI of a first size or a second size smaller than the first size according to the scaling rate _kSCL . An output image OI of the size can be generated. It can be said that the first size corresponds to the reference size, and the second size corresponds to the reduced size.

FIG. 10 shows an output image OI 1, which is an output image OI of a first size, and an output image OI _{2 ,} which is an output image OI of a second size. The number of pixels in the X-axis direction and the number of pixels in the Y-axis direction in the output image OI ₁ are represented by O _X1 and O _Y1 , respectively. The number of pixels in the X-axis direction and the number of pixels in the Y-axis direction in the output image _OI2 are represented by O _X2 and O _Y2 , respectively. “O _X1 >O _X2 ”, “O _Y1 >O _Y2 ”, and “O _X1 :O _Y1 =O _X2 :O _Y2 ”.

Here, “(O _X1 , O _Y1 )=(W _X , W _Y )”. That is, the image size of the output image OI ₁ is equal to the size of the display area DR _W. Therefore, when the output image OI ₁ of the first size is displayed in the display area DR _W , the entire output image OI ₁ is displayed using the entire display area DR _W as shown in FIG. , the outer edge of the display area DR _W and the outer edge of the output image OI ₁ overlap). On the other hand, when the output image OI ₂ of the second size is displayed in the display area DR _W , the entire output image OI ₂ is displayed in a part of the display area DR _W , as shown in FIG.

If wobbling processing is performed while the first size output image OI ₁ is displayed in the display area DR _W , image loss will occur, but the second size output image OI ₂ is displayed in the display area DR _W. Even if wobbling processing is sometimes performed, image loss does not occur or image loss can be suppressed.

Therefore, the processing management unit 12c (see FIG. 5) according to the second embodiment outputs the second size from the input image II when the display mode of the display unit 10 set by the display mode setting unit 11 belongs to the prohibited mode. In order to generate the image OI ₂ , and when the display mode of the display unit 10 set by the display mode setting unit 11 belongs to the non-prohibited mode, the output image OI ₁ of the first size is generated from the input image II. The scaling rate k _SCL is set as follows. The display mode setting method is as described in the first embodiment.

Then, when the set display mode belongs to the prohibited mode (for example, when it is the camera image mode), the output image _OI2 of the second size is displayed in the display area _DRW . At this time, since the enable signal EN _WB is activated, the wobbling process may be executed, and even if the wobbling process is actually executed, image chipping does not occur or image chipping is suppressed. On the other hand, when the set display mode belongs to the non-prohibited mode, the output image OI ₁ of the first size is displayed in the display area DR _W. At this time, since the enable signal EN _WB is activated, wobbling processing may be executed, and if wobbling processing is actually executed, image chipping will occur, but there is no problem even if image chipping occurs. Since the display mode determined to be classified as a non-prohibited mode does not cause any practical problem.

As in this embodiment, by allowing wobbling processing regardless of the display mode and variably controlling the contents of scaling processing according to the display mode, it is possible to substantially eliminate the problem of image loss due to wobbling processing. can.

<<Third Example>>
A third embodiment will be explained. In the third embodiment, it is assumed that "( _O.sub.X , _O.sub.Y )=( _W.sub.X , _W.sub.Y )" is always satisfied, and wobbling processing is permitted or prohibited depending on the state of vehicle CR. Although the content shown in the third embodiment partially overlaps with the content shown in the first embodiment, the method of the third embodiment will be explained in detail below.

The processing management unit 12c according to the third embodiment allows or prohibits wobbling processing by making the enable signal EN _WB active or inactive depending on the state of the vehicle CR.

Specifically, for example, the processing management unit 12c refers to shift information from the shift lever sensor 31, and when the position of the shift lever 3 is set to the reverse position (that is, the traveling direction of the vehicle CR is set to the reverse direction). ), wobbling processing is prohibited. The process management unit 12c allows the wobbling process when the shift lever 3 is set to a position other than the reverse position (for example, the drive position or the parking position).

When the position of the shift lever 3 is set to the reverse position, the display mode of the display unit 10 may be set to the camera image mode based on shift information indicating this. When the display mode is set to the camera image mode, as described in the first embodiment, camera image information based on the photographing result of the camera section 41 is supplied to the display section 10 as image information VI, and the camera image information based on the camera image information is supplied to the display section 10 as image information VI. The camera image is taken as input image II. As a result, the camera image is displayed on the display screen 13 (specifically, the display area DR _W ). The camera image displayed here is a camera image taken by the camera 41R (rear camera) in FIG. 2. The processing management unit 12c generates a camera image of the outside of the vehicle CR (here When the camera image (camera image of the camera 41R) is displayed on the display screen 13, it is preferable to prohibit wobbling processing.

That is, in the third embodiment, the following may be used. When the state of the vehicle CR corresponds to a state in which a camera image of the outside of the vehicle CR (in this case, the camera image of the camera 41R) is displayed on the display screen 13, the processing management unit 12c may prohibit the wobbling process. . More specifically, when the state of the vehicle CR corresponds to a state where the traveling direction of the vehicle CR is set to the backward direction and the camera image (here, the camera image of the camera 41R) is displayed on the display screen 13, the process is performed. The management unit 12c may prohibit wobbling processing.

Note that the state of the vehicle CR referred to for controlling permission or prohibition of wobbling processing may be the running state of the vehicle CR, and when the speed of the vehicle CR is not zero (that is, while the vehicle CR is running) ) It is also possible to adopt a method in which the wobbling process is prohibited, while the wobbling process is allowed when the speed of the vehicle CR is zero (that is, while the vehicle CR is stopped).

That is, for example, the processing management unit 12c refers to the vehicle speed information from the vehicle speed sensor 32 in addition to the shift information from the shift lever sensor 31, and determines that the position of the shift lever 3 is set to the reverse position and the speed of the vehicle CR is The wobbling process may be prohibited when the value is not zero (that is, when the vehicle CR is traveling backwards). As described above, the camera image of the camera 41R may be used as the input image II when the shift lever 3 is set to the reverse position. In this case, even if the position of the shift lever 3 is set to the reverse position, wobbling processing may be permitted when the speed of the vehicle CR is zero, and the position of the shift lever 3 is set to a position other than the reverse position (for example, the drive Wobbling processing may also be permitted when the vehicle is set to the parking position or the parking position.

According to the method described in this embodiment, when the shift lever 3 is set to the reverse position and the camera image of the camera 41R (rear camera) is displayed, an undesirable situation occurs when an image is missing. wobbling processing is prohibited. As a result, image deletion under unfavorable conditions is suppressed when image deletion occurs. Thereby, for example, a good visibility behind the vehicle CR can be ensured using the display screen 13, contributing to safe driving. Since wobbling processing is permitted in situations where it is thought that there will be little trouble even if image chipping occurs, burn-in can also be suppressed.

However, when wobbling processing is prohibited, the problem of burn-in remains. Therefore, in a state in which wobbling processing is prohibited, the brightness of display screen 13 may be set lower than in a state in which wobbling processing is not prohibited. Burn-in is less likely to occur due to the reduction in brightness.

The brightness of the display screen 13 represents the average brightness of the display screen 13 as well as the average brightness of the display area _DRW (average brightness of the image displayed in the display area _DRW ). The user can specify the first brightness (reference brightness) through an operation on the operation unit (not shown). Alternatively, a fixed first brightness is predetermined. The display control unit 12 sets the brightness of the display screen 13 to the first brightness when the wobbling process is permitted by the process management unit 12c, and sets the brightness of the display screen 13 to the first brightness when the wobbling process is prohibited by the process management unit 12c. It is preferable to set the second brightness to a second brightness lower than the first brightness. The difference between the first and second brightness is arbitrary.

Note that since the actual brightness of the display screen 13 depends on the image information VI, the first brightness and the second brightness refer to the output image OI based on constant and predetermined image information VI on the display screen 13 (display area DR _W ). It can be understood that this represents the brightness of the display screen 13 (display area DR _W ) when displayed on the display screen 13 (display area DR W ). In any case, the second brightness is relatively lower than the first brightness.

<<Fourth Example>>
A fourth embodiment will be explained. In the fourth embodiment, the wobbling process may be always permitted regardless of the state of the vehicle CR (the enable signal _ENWB may always be active), and instead, the scaling process may be performed depending on the state of the vehicle CR. variably control the contents of. Although the content shown in the fourth embodiment partially overlaps with the content shown in the second embodiment, the method of the fourth embodiment will be explained in detail below.

As described in the second embodiment, the processing management section 12c can vary the scaling rate _kSCL , and the scaling processing section 12b converts the input image II into an output image of the first size according to the scaling rate _kSCL . An output image OI ₁ that is an OI or an output image OI ₂ that is an output image OI of a second size can be generated (see FIG. 10). The characteristics of the output images OI ₁ and OI ₂ are as described in the second embodiment (see FIGS. 10 to 12). Therefore, if wobbling processing is performed while the first size output image OI ₁ is displayed in the display area _DRW , image loss will occur, but when the second size output image OI ₂ is displayed in the display area _DRW , Even if wobbling processing is performed while the image is on, no image loss occurs or image loss is suppressed.

The display control unit 12 according to the fourth embodiment allows the wobbling process and displays the output image OI ₁ of the first size or the output image OI ₂ of the second size on the display screen 13 ( displayed in the display area DR _W ). The processing management unit 12c sets the scaling rate _kSCL to the first rate, so that the output image OI ₁ is generated from the input image II and displayed on the display screen 13 (display area DR _W ), and the processing management unit 12c performs scaling. By setting the rate k _SCL to the second rate, an output image OI ₂ is generated from the input image II and displayed on the display screen 13 (display area DR _W ). The first rate and the second rate are different from each other.

Specifically, for example, the display control unit 12 refers to the shift information from the shift lever sensor 31, and when the position of the shift lever 3 is set to the drive position (that is, the traveling direction of the vehicle CR is set to the forward direction), the display control unit 12 refers to the shift information from the shift lever sensor 31. (in the state in which the wobbling process is performed), the output image OI ₁ of the first size is displayed on the display screen 13 (display area DR _W ) while allowing the wobbling process. On the other hand, when the position of the shift lever 3 is set to the reverse position (that is, when the traveling direction of the vehicle CR is set to the backward direction), the display control unit 12 allows the wobbling process and the second The output image OI ₂ of the same size is displayed on the display screen 13 (display area DR _W ). When the position of the shift lever 3 is set to a position other than the drive position and the reverse position (for example, the parking position), the processing management unit 12c displays the output image OI ₁ of the first size on the display screen 13 while allowing wobbling processing. (display area DR _W ).

When the position of the shift lever 3 is set to the reverse position, the display mode of the display unit 10 may be set to the camera image mode based on shift information indicating this. When the display mode is set to the camera image mode, as described in the first embodiment, camera image information based on the photographing result of the camera section 41 is supplied to the display section 10 as image information VI, and the camera image information based on the camera image information is supplied to the display section 10 as image information VI. The camera image is taken as input image II. As a result, the camera image is displayed on the display screen 13 (specifically, the display area DR _W ). The camera image displayed here is a camera image taken by the camera 41R (rear camera) in FIG. 2. The display control unit 12 displays a camera image of the outside of the vehicle CR (here When the camera image of the camera 41R) is displayed on the display screen 13, it is preferable to display the output image _OI2 of the second size on the display screen 13 (display area DR _W ) while allowing wobbling processing.

The display control unit 12 displays a camera that photographs the outside of the vehicle CR even when the shift lever 3 is set to the reverse position (that is, the traveling direction of the vehicle CR is set to the reverse direction). When an image other than the image (for example, a navigation image) is displayed on the display screen 13, the first size output image OI ₁ is displayed on the display screen 13 (display area DR _W ) while allowing wobbling processing. good.

That is, in the fourth embodiment, the following may be used. When the state of the vehicle CR corresponds to a state in which a camera image taken of the outside of the vehicle CR (in this case, the camera image of the camera 41R) is displayed on the display screen 13, the display control unit 12 allows wobbling processing while The output image OI ₂ of the second size may be displayed on the display screen 13 (display area DR _W ). More specifically, when the state of the vehicle CR corresponds to a state where the traveling direction of the vehicle CR is set to the forward direction, the display control unit 12 outputs the output image OI ₁ of the first size while allowing the wobbling process. may be displayed on the display screen 13 (display area DR _W ), and on the other hand, the state of the vehicle CR is such that the traveling direction of the vehicle CR is set to the backward direction and the camera image (here, the camera image of the camera 41R) is When corresponding to the state displayed on the display screen 13, the display control unit 12 may display the output image _OI2 of the second size on the display screen 13 (display area DR _W ) while allowing wobbling processing.

Note that the state of the vehicle CR referred to for size control of the output image OI may be the running state of the vehicle CR, and when the speed of the vehicle CR is not zero (that is, while the vehicle CR is running). The output image OI ₂ of the second size is displayed on the display screen 13, while the output image OI ₁ of the first size is displayed on the display screen 13 when the speed of the vehicle CR is zero (that is, while the vehicle CR is stopped). It is also possible to adopt a method such as

That is, for example, the display control unit 12 refers to the vehicle speed information from the vehicle speed sensor 32 in addition to the shift information from the shift lever sensor 31, and determines that the position of the shift lever 3 is set to the reverse position and the speed of the vehicle CR is When the size is not zero (that is, when the vehicle CR is traveling backwards), the output image OI ₂ of the second size may be displayed on the display screen 13 while allowing the wobbling process. As described above, the camera image of the camera 41R may be used as the input image II when the shift lever 3 is set to the reverse position. In this case, even if the position of the shift lever 3 is set to the reverse position, when the speed of the vehicle CR is zero, the output image OI ₁ of the first size is displayed on the display screen 13 while allowing the wobbling process. Even when the shift lever 3 is set to a position other than the reverse position (for example, the drive position or the parking position), the output image OI ₁ of the first size is displayed on the display screen 13 while allowing the wobbling process. It's okay to do that.

As in the present embodiment, while allowing the wobbling process, the content of the scaling process is variably controlled depending on the state of the vehicle CR, thereby substantially eliminating the problem of image loss due to the wobbling process. That is, in situations where it would be undesirable to have an image missing, such as when the shift lever 3 is set to the reverse position and a camera image from the camera 41R (rear camera) is displayed, the wobbling process is allowed. also displays a relatively small second size output image _OI2 . As a result, image deletion under unfavorable conditions is suppressed when image deletion occurs. For example, by using the display screen 13, a good visibility behind the vehicle CR is ensured, which contributes to safe driving. In a situation where it is thought that there will be little trouble even if image chipping occurs, a relatively large first size output image OI ₁ is displayed while allowing wobbling processing. Burn-in is suppressed by allowing wobbling processing.

<<Fifth Example>>
A fifth embodiment will be explained. In the fifth embodiment, it is assumed that "(O _X , O _Y )=(W _X , W _Y )" is always satisfied, and wobbling processing is permitted or prohibited depending on the position of the character image on the display screen 13. This will be explained in detail below.

The display control unit 12 (for example, the processing management unit 12c) according to the fifth embodiment includes a character image detection unit (not shown) that detects whether a character image representing a character is included in the input image II or the output image OI. Be prepared. A well-known method can be used as a method for detecting character images. If the input image II or the output image OI includes a character image, the processing management unit 12c activates or deactivates the enable signal _ENWB depending on the display position of the character image on the display area _DRW . This allows or prohibits wobbling processing.

The shaded area R _EDGE in FIG. 13 is a partial area of the display area DR _W , and is an end display area that exists within a predetermined range from the outer edge of the display area DR _W. The display area _DRW is a rectangular area surrounded by four sides SD1 to SD4, and the sides SD1 to SD4 form the outer edge of the display area _DRW . Sides SD1 and SD2 are two sides parallel to the X-axis and are opposed to each other. Sides SD3 and SD4 are two sides parallel to the Y axis and are opposed to each other. Within the display area _DRW , there are an area within a predetermined distance from side SD1, an area within a predetermined distance from side SD2, an area within a predetermined distance from side SD3, and an area within a predetermined distance from side SD4. The compositing area corresponds to the edge display area R _EDGE . The predetermined distance here is a distance in units of pixels on the display area _DRW (distance in units of the size of one pixel in the X-axis or Y-axis direction), for example, a distance of several pixels or This is the distance of pixels. The size of the predetermined range is determined by the predetermined distance. The predetermined distance may be determined based on the wobbling width described above. If the wobbling process is executed, the image displayed in the end display area when the wobbling process is not executed will protrude from the display area _DRW during the wobbling process.

Therefore, if an important image is displayed in the edge display area _REDGE when wobbling processing is not performed, it is preferable to prohibit wobbling processing. The important image here refers to an image that causes relatively large problems when it becomes a target of image deletion, and in the fifth embodiment, a character image is cited as an important image. For example, a character image representing time or a character image representing subtitles is assumed.

As a specific process, when the input image II or the output image OI includes a character image, the processing management unit 12c determines whether or not the character image is displayed in the edge display area _REDGE . This determination is made on the assumption that the output image OI including the character image is displayed in the display area _DRW without wobbling processing being performed. The processing management unit 12c may prohibit the wobbling process when the character image is displayed in the edge display area _REDGE , and may permit the wobbling process otherwise. Displaying a character image in the edge display area R _EDGE corresponds to displaying a character image within a predetermined range from the outer edge of the display area DR _W under the above assumption. Refers to a situation in which a portion or the entire character image falls within the edge display area _REDGE , or a situation in which the entire character image falls within the edge display area _REDGE .

According to the method described in this embodiment, image loss in character images due to execution of wobbling processing can be avoided. Since wobbling processing is permitted in situations where it is thought that there will be little trouble even if image chipping occurs, burn-in can also be suppressed.

Note that if wobbling processing can be prohibited, the problem of burn-in remains. Therefore, in a state in which wobbling processing is prohibited, the brightness of display screen 13 may be set lower than in a state in which wobbling processing is not prohibited. The brightness setting method here is the same as described in the third embodiment. Burn-in is less likely to occur due to the reduction in brightness.

<<Sixth Example>>
A sixth embodiment will be explained. The contents shown in the sixth embodiment can be combined with any of the first to fifth embodiments described above.

The in-vehicle system SYS shown in FIG. 1 includes a display device. The display unit 10 itself can be considered to be a display device. Alternatively, it can be considered that the display device is composed of the display control section 12 and the display screen 13, and the display mode setting section 11 is provided outside the display device. Further, the speaker unit 20 may also be considered to be included in the components of the display device. All or part of the AV information supply section 40 (for example, the recording medium 43 and the communication section 45) may also be included in the components of the display device.

The in-vehicle system SYS may include a front seat unit FU and a rear seat unit RU shown in FIG. 14. FIG. 14 is a diagram schematically showing the interior of the vehicle CR. Multiple passengers can board the vehicle CR. Seats ST1 to ST3 are provided inside the vehicle CR. Seat ST1 is a driver's seat where the driver of vehicle CR sits. In FIG. 1, occupant PS1 represents the driver of vehicle CR. Unless otherwise specified, the left and right refer to the left and right as viewed from the driver PS1 who is sitting facing forward in the driver's seat ST1.

A seat ST2 (passenger seat) is installed on the left side of the seat ST1, and a seat ST3 (hereinafter sometimes referred to as rear seat ST3) is installed behind the seats ST1 and ST2. A passenger other than the driver PS1 (ie, a fellow passenger) can sit on each of the seats ST2 and ST3. In the example of FIG. 14, seat ST3 is a wide seat on which multiple occupants can sit. In FIG. 14, occupant PS2 is a fellow passenger sitting in rear seat ST3. The front seat unit FU is an electronic device for the driver PS1, and the rear seat unit RU is an electronic device for the passenger sitting in the rear seat ST3.

The front seat unit FU is installed in front of the driver's seat ST1 so that the driver PS1 can easily view the display screen provided on the front seat unit FU. The rear seat unit RU is located on the rear side of the seats ST1 and ST2 and located on the rear side of the seats ST1 and ST2 so that the passenger sitting on the rear seat ST3 (here, the passenger PS2) can easily view the display screen provided on the rear seat unit RU. It is installed on the front side of ST3. For example, the housing of the rear seat unit RU may be supported by the top plate of the vehicle CR. In the in-vehicle system SYS, the front seat unit FU may function as a so-called headset device, and the rear seat unit RU may function as a so-called rear seat entertainment (RSE) device. Through a local area network formed in the vehicle CR, the units FU and RU are connected wirelessly or by wire to enable two-way communication with each other. The navigation section 42, recording medium 43, broadcast wave receiving section 44, and communication section 45 shown in FIG. 1 may be provided in the front seat unit FU.

The display screen 13 in FIG. 1 may be the display screen of the front seat unit FU. In this case, the entire display section 10 in FIG. 1 is provided in the front seat unit FU.

Alternatively, the display screen 13 in FIG. 1 may be the display screen of the rear seat unit RU. In this case, the entire display section 10 in FIG. It may be provided in the FU.

A case will be considered in which the display control section 12 and display screen 13 are provided in the rear seat unit RU, while the display mode setting section 11 is provided in the front seat unit FU, and an example of the configuration of the units FU and RU in this case is shown in FIG.

In the configuration example shown in FIG. 15, the rear seat unit RU includes a microcomputer 71, a video signal processing section 72 made up of a video integrated circuit, an ASIC (Application Specific Integrated Circuit) 73, and a display screen 13. In the front seat unit FU, a display mode setting section 11 (see FIG. 1) is implemented using a microcomputer or the like. The display control section 12 is composed of the microcomputer 71, the video signal processing section 72, and the ASIC 73. The display mode set by the display mode setting unit 11 is notified to the rear seat unit RU through a local area network (AVCLAN (Audio Visual Communication Local Area Network), etc.) formed in the vehicle CR. Further, the image information VI may also be transmitted from the front seat unit FU to the rear seat unit RU via the local area network.

The video signal processing unit 72 transmits a video signal based on the image information VI to the ASIC 73 under the control of the microcomputer 71, and the ASIC 73 drives the display screen 73 based on the video signal to display the video signal based on the image information VI. The image is displayed on the display screen 13. Scaling processing is executed by the video signal processing section 72. The microcomputer 71 sets a scaling rate k _SCL for scaling processing in the video signal processing section 72 . Wobbling processing is executed in the ASIC 73. Bidirectional communication is possible between the microcomputer 71 and the ASIC 73 by SPI (Serial Peripheral Interface) communication, and the microcomputer 71 allows or prohibits wobbling processing in the ASIC 73 using SPI communication. Further, the microcomputer 71 controls the brightness of the display screen 13 by sending a brightness control signal to the ASIC 73.

Although it is assumed that the display screen 13 is composed of organic EL elements, the display screen 13 may be composed of electro-optical elements (for example, liquid crystal display elements) other than organic EL elements. However, the configuration according to the present invention is particularly useful when an electro-optical element that can cause burn-in is used.

The embodiments of the present invention can be appropriately modified in various ways within the scope of the technical idea shown in the claims. The above embodiments are merely examples of the embodiments of the present invention, and the meanings of the terms of the present invention and each component are not limited to those described in the above embodiments. The specific numerical values shown in the above-mentioned explanatory text are merely examples, and it goes without saying that they can be changed to various numerical values.

CR Vehicle SYS In-vehicle system 10 Display section 11 Display mode setting section 12 Display control section 12a Wobbling processing section 12b Scaling processing section 12c Processing management section 13 Display screen 20 Speaker section 30 On-vehicle sensor section 40 AV information supply section DR _W display area II Input Image OI Output image

Claims (3)

A display device mounted on a vehicle,
a display screen;
a display control unit that controls display content on the display screen;
The display control unit includes a wobbling processing unit that executes wobbling processing to move the display position of the image displayed on the display screen, and an output image of a first size or a second size smaller than the first size from the input image. a scaling processing unit that generates an output image of the size, and displays the output image of the first size or the second size on the display screen depending on the state of the vehicle. When the state of the vehicle corresponds to a state in which a camera image taken of the outside of the vehicle is displayed on the display screen, the display control unit causes the output image of the second size to be displayed on the display screen. The display device according to claim 1. When the state of the vehicle corresponds to a state in which the traveling direction of the vehicle is set to the backward direction and the camera image is displayed on the display screen, the display control unit displays the output image of the second size as the The display device according to claim 2, which is displayed on a display screen.

Images