JP2017203919A - projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector that makes it possible to prompt users to select an adjustment value set when the adjustment value set of an optical system is stored.SOLUTION: A projector comprises: at least optical system drive means that drives any of a zoom, focus and lens shift; drive position acquisition means that acquires a drive position of the optical system drive means; storage means 107 that stores at least one of an adjustment value set expressing the drive position of respective optical system drive means in a prescribed state of an optical system; comparison means 106 that regularly compares the drive position acquired by the drive position acquisition means with a prescribed adjustment value while the prescribed optical system drive means is used to drive the optical system; on-screen means 104 that, when the drive position and the adjustment value satisfy a prescribed condition, enables a selection of the adjustment value set; and optical system control means that, when a selection operation of the adjustment value set is implemented, uses the optical system drive means to drive the optical system.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projector, and more particularly to a projector that controls at least one of optical characteristics of zoom, focus, and lens shift with an electric motor.

  2. Description of the Related Art Conventionally, a storage unit that stores a plurality of adjustment value sets related to image projection onto a screen, and a selection unit that selects a desired one from the adjustment value sets are provided. Projectors that adjust image quality are known.

  Patent Document 1 discloses a projector control that performs optical and image quality adjustment based on an adjustment value set by selecting one of adjustment value sets corresponding to each of projection conditions A and B by using a projection condition selection key of a remote control. An apparatus is disclosed.

JP 2003-295321 A

  However, in the prior art disclosed in Patent Document 1 described above, a selection button must be provided on the remote control for each installation environment in which the projector is used, and the number of selection buttons that can be prepared is limited. In addition, when the conventional technique disclosed in Patent Document 1 is used, the adjustment of the zoom, the focus, and the lens shift is individually performed without the user noticing the adjustment value set even though the adjustment value set is stored in advance. There was a problem that it took time to complete the adjustment.

  Accordingly, an object of the present invention is to provide a projector that can prompt the user to select an adjustment value set when an optical system adjustment value set is stored.

In order to achieve the above object, a projector according to the present invention provides:
At least one optical system driving means for driving any one of zoom, focus, and lens shift,
Drive position acquisition means for acquiring the drive position of the optical system drive means is provided corresponding to each optical system drive means,
Storage means for storing at least one adjustment value set representing a driving position of each optical system driving means in a predetermined state of the optical system;
While the optical system is being driven using the predetermined optical system driving means, at least the driving position acquired by the driving position acquisition means and the storage means corresponding to the optical system driving means being driven Comparing means for periodically comparing the adjustment values in the stored predetermined adjustment value set,
In the comparison means, when the drive position and the adjustment value satisfy a predetermined condition, the comparison means includes an on-screen means for displaying an on-screen screen that enables selection of the adjustment value set,
An optical system control unit that drives the optical system using the optical system driving unit based on the adjustment value set when a selection operation of the adjustment value set is performed on the on-screen screen; Features.

  According to the present invention, it is possible to provide a projector that can prompt the user to select an adjustment value set when an optical system adjustment value set is stored.

Block diagram showing the internal configuration of the projector Examples of zoom, focus, and lens shift positions stored in memory Flow chart showing an example of the behavior of the projector when focus drive is performed Example of registered memory selection screen Example of registered memory selection screen A flowchart showing an example of the behavior of the projector after a predetermined time has elapsed after the focus drive is stopped Block diagram showing the internal configuration of the projector A flowchart showing an example of the behavior of the projector after a predetermined time has elapsed after the focus drive is stopped Flowchart showing an example of projector behavior during auto focus adjustment Example of registered memory selection screen

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows an example of the configuration of a projector according to an embodiment of the invention.

[Example 1]
Hereinafter, the configuration and behavior of the projector according to the first embodiment of the present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3, FIG.

FIG. 1 is a block diagram showing the internal configuration of the projector according to the first embodiment of the present invention.
The signal input unit 101 receives an input of video / image signals outside or inside the projector. The signal processing unit 102 converts the video / image signal input from the signal input unit into a video signal format that can be processed inside the projector. The image processing unit 103 corrects image quality such as brightness, contrast, and sharpness of the video signal and angle of view such as keystone correction based on image processing parameters set in advance by the projector.

  An OSD (On Screen Display) control unit 104 as on-screen means superimposes an on-screen image such as a menu screen on the video signal based on the processing result of the CPU 109. Based on the video signal processed in this way, the liquid crystal panel control unit 105 forms an image on the liquid crystal panel 120. An optical signal emitted from the light source 119 is modulated by an image formed on the liquid crystal panel 120 and emitted outside the projector via the projection lens 121 to form a projected image on the screen. The projector includes an operation unit 108 and receives an operation from the user. Specific examples of the operation unit include a remote controller and a keypad provided in the projector body.

  Here, the projection lens 121 is configured to be able to adjust lens shift, focus, and zoom, and includes a motor as an optical system drive unit and an encoder as a drive position acquisition unit in order to perform the respective controls. (Lens shift drive motor 118, lens shift position encoder 117, focus drive motor 116, focus position encoder 115, zoom drive motor 114, zoom position encoder 113). In addition, a control unit that controls the motor and the value acquisition from the encoder is provided (lens shift control unit 112, focus control unit 111, zoom control unit 110).

  The memory 107 serving as a storage unit stores at least one set of zoom, focus, and lens shift position encoding values at a predetermined lens position. The CPU 109 instructs the comparison unit 106 as a comparison unit to compare the encoded values acquired from the lens shift control unit 112, the focus control unit 111, and the zoom control unit 110 with the corresponding encoded values stored in the memory 107. To do. In the comparison unit 106, when the encoded value acquired from the encoder and the encoded value stored in the memory 107 are within a predetermined difference, the CPU 109 displays an on-screen screen for selecting the memory using the OSD control unit 104. .

  Here, an example of the encoded value stored in the memory 107 will be shown using FIG. The range value indicates the lower limit to the upper limit of the encoded value acquired from the encoder (117, 115, 113). For example, regarding the focus, the near end is set to 0 and the far end is set to 65535. The zoom, focus, and lens shift values stored in the memories 1 to 3 are the encoding values obtained from the encoders when a save operation is executed by a menu operation by the user at a certain lens position. .

  In response to an instruction from the CPU 109, each lens control unit as an optical system control unit returns the lens position based on the range information registered in each memory and the encoded values of zoom, focus, and lens shift. Since the range information is basically fixed in the mounted projection lens, the range information is not stored in the memory 107 but may be stored in the lens shift control unit 112, the focus control unit 111, and the zoom control unit 110, respectively. good.

  Next, the behavior of the projector according to the embodiment of the present invention when focus driving is performed will be described with reference to FIG.

  If focus drive is being performed, the CPU 109 acquires the focus drive position from the focus position encoder 115 via the focus control unit 111 (S301). In S302, the CPU 109 determines whether or not all registered memories have been compared with the acquired focus drive position (encoded value). If the comparison has not been completed, in S303, the CPU 109 compares the focus drive position (encoded value) acquired in S301 with the focus adjustment value (encoded value) in the registration memory to be compared. In S304, the CPU 109 uses the comparison unit 106 to determine whether or not the difference between them is equal to or less than a predetermined value Nf. The predetermined value here is predetermined by the projector, and for example, the difference is 655 or less (1/100 or less of the range).

  When the difference is equal to or smaller than the predetermined value, the CPU 109 instructs the OSD control unit 104 to display an on-screen image configured to be able to select a memory to be compared (S305). If the difference exceeds the predetermined value, S305 is skipped.

  Next, the registration memory to be compared is set as another registration memory (S306), and a series of processes from S302 is executed again. When the comparison with all the registered memories is completed, an on-screen image that can select a registered memory whose focus adjustment value is in the vicinity of the current focus encode value is displayed.

  For example, an on-screen image as shown in FIG. 4 is displayed, and a memory selection screen 402 is displayed superimposed on the focus adjustment dialog 401. If the focus adjustment values in the plurality of registration memories are in the vicinity of the current focus encoding value, a plurality (402, 403) of on-screen images from which the registration memory can be selected are displayed as shown in FIG. .

  Here, when the focus adjustment operation is stopped and the selection operation of the memory selection screen 402 is performed, for example, by pressing the direction button / OK button on the remote control, the CPU 109 performs the focus control unit, zooming according to the registered contents of the memory 2 The control unit and the lens shift control unit are each instructed to return the lens position based on the memory contents selected in 402. In S307, the CPU 109 determines whether or not the focus drive has been completed. If not, the series of processes from S301 is repeated.

  This embodiment has been described as an example of focus driving. The zoom and lens shift driving can be performed with the same configuration as the focus driving.

  That is, when zoom driving, the current zoom encode value and the zoom adjustment value in the registration memory are compared, and during lens shift driving, the current lens shift encode value and the lens shift adjustment value in the registration memory are compared, thereby focusing. The same behavior as driving can be realized.

[Example 2]
Hereinafter, with reference to FIG. 6, the behavior of the projector after a predetermined time has elapsed after the focus drive is stopped according to the second embodiment of the present invention will be described.
In S601, the CPU 109 determines whether or not a predetermined time has elapsed since the focus drive stop request was sent to the focus control unit 111. If the predetermined time or more has elapsed, the CPU 109 acquires the focus drive position from the focus position encoder 115 via the focus control unit 111 in S602. Thereafter, a series of processing from S302 to S306 is executed.

  With the above processing, when the comparison with all the registered memories is completed, an on-screen image capable of selecting a registered memory whose focus adjustment value is in the vicinity of the current focus encode value is displayed.

  This embodiment has been described as an example of focus driving. The zoom and lens shift driving can be performed with the same configuration as the focus driving. That is, when zoom driving, the current zoom encode value and the zoom adjustment value in the registration memory are compared, and during lens shift driving, the current lens shift encode value and the lens shift adjustment value in the registration memory are compared, thereby focusing. The same behavior as driving can be realized.

[Example 3]
Hereinafter, the configuration and behavior of the projector according to the third embodiment of the invention will be described with reference to FIGS. FIG. 7 is a block diagram showing the internal configuration of the projector according to the third embodiment of the invention.

  A distance measuring sensor 122 as a distance measuring means measures the distance from the projector body to the image projection plane. The measured distance information is converted into a format that can be compared by the comparison unit 124 by the conversion unit 123. The format that can be compared by the comparison unit 124 is preferably the same as the format of the focus adjustment value stored in the registration memory. For example, the format is converted into a value corresponding to the encoded value of the focus position encoder. Hereinafter, this value is referred to as a distance information conversion value.

  The CPU 109 instructs the comparison unit 124 to compare the distance information conversion value with the corresponding encoded value stored in the memory 107. When the distance information conversion value and the encoded value stored in the memory 107 fall within a predetermined difference in the comparison unit 124, the CPU 109 displays an on-screen screen for selecting the memory using the OSD control unit 104. The other functional blocks in FIG. 7 have the same functions as the functional blocks to which the same numbers are assigned in FIG.

  Hereinafter, with reference to FIG. 8, the behavior of the projector after a predetermined time has elapsed after the focus drive has been stopped according to the third embodiment of the present invention will be described.

  In S801, the CPU 109 determines whether or not a predetermined time has elapsed since the focus drive stop request was sent to the focus control unit 111. If the predetermined time has elapsed, in S802, the CPU 109 uses the distance measuring sensor 122 to measure the distance between the projector and the projection surface. The measured distance data is converted into a distance information conversion value by the comparison unit 124 in the conversion unit 123 (S803). S302, S304, S305, and S306 are equivalent to the processes with the same numbers already described.

  If the comparison between the focus adjustment value (encoded value) of all the registered memories and the distance information conversion value has not been completed in S302, the CPU 109 in S804 determines the distance information conversion value and the focus adjustment value (in the registration memory to be compared) ( Compare encoding values. Thereafter, in S302, the series of processing from S302 to S306 is repeated until the comparison between the focus adjustment value (encoded value) of all the registered memories and the distance information conversion value is completed.

  With the above processing, when the comparison with all the registered memories is completed, an on-screen image is displayed that can select a registered memory whose focus adjustment value is in the vicinity of the focus encode value after the focus drive is stopped. Become. Accordingly, it is possible to prompt the user who has performed the focus adjustment without noticing that the optical adjustment value is stored in the registration memory to select the registration memory.

[Example 4]
Hereinafter, with reference to FIG. 9 and FIG. 10, the behavior of the projector when the automatic focus adjustment is performed according to the fourth embodiment of the present invention will be described.

  In S901, the CPU 109 uses the distance measuring sensor 122 to measure the distance between the projector and the projection plane and sets it as the target distance. Based on the measured distance data, the CPU 109 drives the focus drive motor 116 via the focus control unit 111 and adjusts the projection plane to be within the depth of field (S902). Thereby, a projected image in focus on the projection surface can be obtained. The target distance obtained in S901 is converted into a distance information conversion value in the comparison unit 124 in the conversion unit 123 (S903). S302, S804, S304, and S306 are equivalent to the processes with the same numbers already described.

  When the difference is equal to or smaller than the predetermined value in S304, the CPU 109 temporarily holds the comparison target memory on the memory as a selection candidate (S904). If the difference exceeds the predetermined value, S904 is skipped. When the comparison with all registered memories is completed, the CPU 109 instructs the OSD control unit 104 to display an on-screen image configured to be able to select selection candidates held in the memory.

  With the above processing, when the comparison with all the registered memories is completed, an on-screen image is displayed that can select a registered memory whose focus adjustment value is in the vicinity of the focus encode value corresponding to the target distance. Become.

  An example of the on-screen image displayed here is shown in FIG. In the dialog shown in FIG. 10, for example, when the memory 2 is selected, the CPU 109 projects through the focus control unit, the zoom control unit, and the lens shift control unit based on the focus, zoom, and lens shift adjustment values registered in the memory 2. The lens 121 is adjusted.

  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.

101 signal input unit, 102 signal processing unit, 103 image processing unit, 104 OSD control unit,
105 LCD panel control unit, 106 comparison unit, 107 memory, 108 operation unit, 109 CPU,
110 zoom control unit, 111 focus control unit, 112 lens shift control unit,
113 zoom position encoder, 114 zoom drive motor,
115 focus position encoder, 116 focus drive motor,
117 Lens shift position encoder, 118 Lens shift drive motor, 119 Light source,
120 LCD panel, 121 projection lens

Claims (4)

At least one optical system driving means for driving any one of zoom, focus, and lens shift,
Drive position acquisition means for acquiring the drive position of the optical system drive means is provided corresponding to each optical system drive means,
Storage means for storing at least one adjustment value set representing a driving position of each optical system driving means in a predetermined state of the optical system;
While the optical system is being driven using the predetermined optical system driving means, at least the driving position acquired by the driving position acquisition means and the storage means corresponding to the optical system driving means being driven Comparing means for periodically comparing the adjustment values in the stored predetermined adjustment value set,
In the comparison means, when the drive position and the adjustment value satisfy a predetermined condition, the comparison means includes an on-screen means for displaying an on-screen screen that enables selection of the adjustment value set,
An optical system control unit that drives the optical system using the optical system driving unit based on the adjustment value set when a selection operation of the adjustment value set is performed on the on-screen screen; Projector featuring. At least one optical system driving means for driving any one of zoom, focus, and lens shift,
Drive position acquisition means for acquiring the drive position of the optical system drive means is provided corresponding to each optical system drive means,
Storage means for storing at least one adjustment value set representing a driving position of each optical system driving means in a predetermined state of the optical system;
After the optical system is driven by the optical system drive unit, the drive position acquired by the drive position acquisition unit corresponding to at least the driven optical system drive unit is stored in the storage unit after a predetermined time has elapsed. A comparison means for comparing the adjustment values in the predetermined adjustment value set,
In the comparison means, when the drive position and the adjustment value satisfy a predetermined condition, the comparison means includes an on-screen means for displaying an on-screen screen that enables selection of the adjustment value set,
An optical system control unit that drives the optical system using the optical system driving unit based on the adjustment value set when a selection operation of the adjustment value set is performed on the on-screen screen; Projector featuring. Among at least zoom, focus and lens shift, at least one optical system driving means for driving the focus is provided.
Drive position acquisition means for acquiring the drive position of the optical system drive means is provided corresponding to each optical system drive means,
Storage means for storing at least one adjustment value set representing a driving position of each optical system driving means in a predetermined state of the optical system;
Equipped with a distance measuring means for measuring the distance between the projector and the projection screen,
After the optical system is driven by the optical system driving unit, after a predetermined time has elapsed, the distance information acquired using the distance measuring unit is compared with the focus adjustment value in the predetermined adjustment value set stored in the storage unit. Comparing means to
In the comparing means, when the distance information and the focus adjustment value satisfy a predetermined condition, an on-screen means for displaying an on-screen screen that enables selection of the adjustment value set is provided,
An optical system control unit that drives the optical system using the optical system driving unit based on the adjustment value set when a selection operation of the adjustment value set is performed on the on-screen screen; Projector featuring. Among at least zoom, focus and lens shift, at least one optical system driving means for driving the focus is provided.
Drive position acquisition means for acquiring the drive position of the optical system drive means is provided corresponding to each optical system drive means,
Storage means for storing at least one adjustment value set representing a driving position of each optical system driving means in a predetermined state of the optical system;
Equipped with a distance measuring means for measuring the distance between the projector and the projection screen,
Auto focus means for adjusting the focus using an optical system drive means for driving the focus with the distance between the projector and the projection screen acquired by the distance measurement means as a target;
Comparing means for comparing a target adjustment distance and a focus adjustment value in a predetermined adjustment value set stored in the storage means after performing autofocus,
In the comparison means, when the target distance and the focus adjustment value satisfy a predetermined condition, the comparison means includes an on-screen means for displaying an on-screen screen that enables selection of the adjustment value set,
An optical system control unit that drives the optical system using the optical system driving unit based on the adjustment value set when a selection operation of the adjustment value set is performed on the on-screen screen; Projector featuring.