JP2017156366A - Image projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image projection device capable of easily and visually recognizing a menu OSD by a user even when a projector screen is not a rectangular type.SOLUTION: An image projection device having OSD menu display means observes an input video signal to be projected. The image projection device includes: menu display pixel detection means for setting a pixel position where even one video data other than black at each pixel position is set as a menu displayable pixel position; menu display area detection means for setting a pixel area equal to or more than the predetermined area in density of the menu displayable pixel position as a menu displayable area; and display form change means for changing a display form of a menu OSD according to a form of the menu display area.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image projection apparatus that displays a menu OSD, and more particularly to an image projection apparatus that projects onto a projection screen other than a rectangle.

  Conventionally, the projection screens of projectors are often rectangular, but in recent years, advertisements and display systems using projectors and large liquid crystal display displays called digital signage have been widely used in the world. In particular, digital signage using a projection screen other than a rectangular type using a projector is a technology that is attracting more and more attention in the future.

  However, since the projection screen is not rectangular, there is a problem that it is difficult for the user to easily view the menu OSD.

  In response to this problem, Patent Document 1 discloses that when the aspect of the display image is changed, the character size of the OSD to be displayed is changed accordingly. Patent Document 2 discloses that the menu display method is changed so that the display area of the menu OSD falls within the projection area of the corrected video according to the projection area when the keystone correction is performed.

JP 2009-216815 A JP 2006-19869 A

  However, in the prior art disclosed in the above-mentioned patent document, when the projection screen is not rectangular, the menu OSD cannot be visually recognized when there is no projection screen in the area for displaying the menu OSD as shown in FIG. ).

  Accordingly, an object of the present invention is to provide an image projection apparatus that allows a user to easily view a menu OSD even when the projection screen is not rectangular.

In order to achieve the above object, an image projection apparatus according to the present invention includes:
In an image projection apparatus provided with an OSD menu display means, a menu display pixel position where an input video signal to be projected is observed, and at least one video data other than black is detected at each pixel position is a menu displayable pixel position According to the shape of the menu display area, the detection means, the menu display area detection means for setting the pixel area where the density of the menu displayable pixel positions is a predetermined value or more in the entire projection image, and the shape of the menu display area. Display form changing means for changing the display form.

  According to the present invention, it is possible to provide an image projection apparatus that allows the user to easily visually recognize the menu OSD even when the projection screen is not rectangular.

3 is a diagram illustrating a liquid crystal projector that displays a menu OSD in Embodiment 1. FIG. It is a figure which shows the liquid crystal projector which does not change a menu OSD display form adaptively. 1 is a configuration diagram of a projector 100. FIG. FIG. 3 is a flowchart in the first embodiment. 2 is an example of video projection in the first embodiment. FIG. 4 is a relationship diagram of a projector 100, a screen 300, and a projection area 200. This is a projected image 400. It is a menu OSD example. It is a flowchart figure of a menu OSD display availability analysis. It is a menu OSD division | segmentation display example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a liquid crystal projector that adaptively changes the display form of a menu OSD to be displayed according to an embodiment of the present invention.

[Example 1]
A liquid crystal projector that adaptively changes the menu OSD to be displayed according to the first embodiment of the present invention will be described below with reference to the drawings.

  An image projection apparatus according to a first embodiment of the present invention will be described. In this embodiment, a liquid crystal projector will be described as an example of a liquid crystal display device. In addition, a single-plate type, a three-plate type, and the like are generally known for liquid crystal projectors, but either type may be used. The liquid crystal projector of this embodiment presents an image to the user by controlling the light transmittance of the liquid crystal element according to the image to be displayed and projecting light from the light source dropped on the liquid crystal element onto the screen. Shall.

(Overview of projector)
First, the internal configuration of the projector 100 will be described in detail with reference to FIG.

  The projector 100 includes a projection optical system 101, a liquid crystal panel 102, a light source 103, a light source control unit 104, a liquid crystal drive unit 105, an optical system control unit 106, a video IF 107, a CPU 108, an image processing unit 109, a ROM 110, a RAM 111, and an operation unit 112. Is done.

  Next, each part mentioned above is demonstrated in detail.

  The projection optical system 101 is for projecting an output image on a screen, and includes a plurality of lenses and lens driving actuators. By driving the lenses with the actuators, the projection image is enlarged, reduced, and focused. And so on. The liquid crystal panel 102 generates an image dedicated to each color from each color light (red (R), green (G), blue (B)) emitted from the light source 103 and separated by a mirror (not shown). The light source control unit 104 performs adjustment of the light amount of the light source, control of ON / OFF of emission, and the like based on a control command sent from the control unit 108 described later.

  The liquid crystal driving unit 105 adjusts the transmittance for reproducing each color of RGB based on the input video signal. The optical system control unit 106 performs various adjustments such as zoom ratio, shift amount, and focus based on a control command sent from the control unit 108. The video IF 107 is an interface for connecting to a video output device or the like, and is used for transmission / reception of video signals, audio signals, and various control signals. The CPU 108 performs an instruction to each unit based on a program stored in the ROM 110 described later, state management / projection mode management in the projector 100, and the like.

  The image processing unit 109 performs various kinds of change processing such as input image resolution, frame rate, image shape deformation, and tone conversion. Note that the image processing unit 109 also performs image analysis processing described later. The ROM 110 is used for storing a program for controlling the inside of the projector and data that should always be retained. The RAM 111 is used for temporarily storing image data input from the video IF 107, image data when the image processing unit 109 performs image processing, a work memory of the CPU 108, and the like. The operation unit 112 is various operation buttons provided in the housing of the projector 100 and is an operation interface for controlling functions of the projector 100.

(Explanation of basic operation of projector)
Next, the basic operation of the projector 100 will be described.

  When the user receives a power-on instruction from the operation unit 112 or a control remote controller (not shown), the CPU 108 instructs the power supply unit to supply power to each unit of the projector 100.

  The video IF 107 is an interface for receiving a video signal from an external video output device. For example, the composite IF, S video terminal, D terminal, component terminal, analog RGB terminal, DVI-I terminal, DVI-D terminal, HDMI Includes (registered trademark) terminals. When an analog video signal is received, the received analog video signal is converted into a digital video signal. Then, the received video signal is transmitted to the image processing unit 109.

  Here, the video output device may be any device such as a personal computer, a camera, a mobile phone, a smartphone, a hard disk recorder, and a game machine as long as it can output a video signal.

  The image processing unit 109 performs processing for changing the number of frames, the number of pixels, the image shape, and the like on the video signal received from the video output device, and transmits the video signal to the liquid crystal control unit 105. For example, from the microprocessor for image processing Become. Further, the image processing unit 109 does not need to be a dedicated microprocessor. For example, the control unit 108 may execute the same processing as the image processing unit 109 by a program stored in the ROM 110. The image processing unit 109 can execute functions such as frame thinning processing, frame interpolation processing, resolution conversion processing, distortion aberration correction processing, keystone correction processing, and edge blend processing.

  The liquid crystal driving unit 105 adjusts the transmittance for reproducing each color of RGB based on the input video signal. The video IF 107 detects whether or not an image is input from the outside. If the image is not input, the video IF 107 waits until a video input is detected, and if input, performs a projection process. Here, the image input from the image 107 is transmitted to the image processing unit 109 as the projection processing, and the image processing unit 109 executes the various processes described above, and then transmits the image processing unit 109 to the liquid crystal driving unit 105. Based on the video input by the liquid crystal driving unit 105, the transmittance of the liquid crystal panel 102 is controlled so that the transmittance corresponds to the gradation level of each RGB component.

  Then, the light source controller 104 controls the light output from the light source 103. The light output from the light source 103 is separated into red (R), green (G), and blue (B), and each light is supplied to the liquid crystal panel 102. The amount of light of each color supplied to the liquid crystal 102 is limited for each pixel of each liquid crystal panel. Then, the red (R), green (G), and blue (B) lights transmitted through the liquid crystal panel 102 are combined again through a prism (not shown) and projected through the projection optical system 101. As described above, the projector 100 according to the present embodiment projects an image output from an external image output device or the like.

(Description of characteristic operations of the present invention)
Next, details of the implementation method of the present invention will be described with reference to an operation flowchart (FIG. 4) mainly using the projector 100. FIG.

  In this embodiment, as shown in FIG. 5, the projector 100 projects an image on a non-rectangular screen 300 installed on the image projection area 200 of the projector 100. This is a state in which the projector 100 projects the projection image 400 shown in FIG. 7 toward the non-rectangular projection screen 300 as shown in FIG.

  The operation flow will be described.

  The projector 100 receives the video signal input to the video IF 107, and the CPU 108 analyzes the video signal (S401).

  The analysis of S401 will be described using FIG.

  In the analysis, a pixel value to be a background color is designated in advance using a menu or the like, and whether or not a pixel value different from that is detected is analyzed for each pixel on the entire screen (S901). A pixel position where a pixel value other than the background color is not input for one frame after video input becomes a background pixel and is determined to be a menu display disabled pixel (S902), but a pixel value other than the background color is input even in one frame. The pixel position is determined as a menu displayable pixel (S903). Since this analysis is performed sequentially as video is input, the analysis results are updated sequentially and differ from the background color at each pixel position until a power reset of the projector, input video switching, input video signal format change, etc. occur. The result that the pixel value is detected is retained.

  Next to S401, a menu displayable area is detected based on the video analysis result (S402). In this menu display area detection, an area in which the pixel positions that have become menu displayable pixels in S401 have a predetermined density (for example, a menu displayable pixel density in a certain area is 50%) is detected. Next, when the user presses the menu display button (S403), it is determined from the search result of S402 whether the menu OSD can be displayed in the normal display area (S404). If the menu OSD can be displayed at the normal display position, the menu OSD is displayed as it is at the normal display position (S405).

  The normal display position mentioned here is a default display position of the projector 100 or a display position when the user changes the menu display position using a remote controller or the like. If there is no menu OSD displayable area at the normal display position in S404, the menu OSD is displayed in the menu displayable area detected in S402.

  As described above, by analyzing the input video data, searching the menu OSD display area, and displaying the menu OSD in the area, the user can visually recognize the menu OSD even when the menu OSD cannot be displayed in the normal OSD display area. it can.

  In the present embodiment, the position of the menu OSD is changed. However, if the menu OSD display area cannot be large enough to display a normal menu, the menu OSD is changed according to the item as shown in FIG. You may divide and display. Besides the split display, the size of the menu screen and the font of display characters may be reduced according to the result of the displayable area, and the horizontal writing notation of the menu may be vertical writing notation.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

100 projector, 200 image projection area, 300 projection screen,
400 display menu OSD, 101 projection engineering system, 102 liquid crystal panel,
103 light source, 104 light source control unit, 105 liquid crystal drive unit, 106 optical system control unit,
107 Video IF, 108 CPU, 109 Image processing unit, 110 ROM,
111 RAM, 112 operation unit, 113 camera, 114 communication IF

Claims (6)

In an image projection apparatus provided with an OSD menu display means,
A menu display pixel position detecting means for observing an input video signal to be projected and setting a pixel position at which at least one video data other than black is detected at each pixel position as a menu displayable pixel position;
Menu display area detecting means for setting the menu displayable area to a pixel area in which the density of the menu displayable pixel positions is a predetermined value or more in the entire projection image;
Display form changing means for changing the display form of the menu OSD according to the shape of the menu display area;
An image projection apparatus comprising: The image projection apparatus according to claim 1, wherein the display form changing unit changes the size of the menu OSD, the display position, the typeface, and the menu display hierarchy. 2. The image projecting apparatus according to claim 1, wherein the information on the menu displayable area detected by the menu display area detecting unit is reset when the power of the image projecting apparatus is turned on. A plurality of video input means,
2. The image projection apparatus according to claim 1, wherein the information on the menu displayable area detected by the menu display area detection unit is reset when the input video signal of the image projection apparatus is switched. The image projection apparatus according to claim 1, wherein the menu display pixel detection unit can designate data other than black. The image projection apparatus according to claim 1, wherein the menu display pixel detection unit accumulates and holds menu displayable area information until reset.