JP5834570B2 - Electronics - Google Patents

Description

  The present invention relates to an electronic device.

  A projector capable of controlling the opening and closing of a projection lens cover by operating a button on a remote control is known (see, for example, Patent Document 1). In this projector, even when a projection start instruction is issued using a remote control, the cover is kept closed in a state where a safe mode for restricting the emission of projection light from the light source is set. Yes.

JP 2010-2111199 A

  However, in this projector, it has not been considered to manually open and close the cover.

  An object of the present invention is to provide an electronic device that can suppress glare at the start of projection even when the cover of the projection lens is manually opened and closed.

Electronic device according to the present invention includes a projection unit for projection Riga image by the light emitted from the light source, and the operating unit, when the projector to project the projection portion is started, a period of time the light source in the first light quantity A light source control unit that controls the light source so as to gradually increase the amount of light emitted from the light source to a second amount of light that is greater than the first amount of light when the predetermined period has elapsed. parts, when the predetermined period or manipulation of the amount of light emitted from the light source to the operating unit during a period in which gradually increased to the second light quantity is performed, the amount of light emitted from the light source The second amount of light is used.

  According to the electronic apparatus of the present invention, glare can be suppressed even when the projection lens cover is manually opened and closed.

It is a perspective view which shows the front surface of the camera which concerns on embodiment of this invention. It is a figure which shows the open state and closed state of the cover of the camera which concerns on embodiment of this invention. It is a block diagram which shows the system configuration | structure of the camera which concerns on embodiment of this invention. It is a flowchart which shows the process at the time of the projection start of the camera which concerns on embodiment of this invention. It is a graph which shows control of the light quantity inject | emitted from LED of the camera which concerns on embodiment of this invention.

  Hereinafter, an electronic apparatus according to an embodiment of the present invention will be described with reference to the drawings, taking a camera provided with a projector as an example. FIG. 1 is a perspective view showing the front surface of the camera according to the embodiment. The camera 2 is a digital camera equipped with a projector, and a front surface of the housing 4 is provided with a photographing lens 6 for entering subject light, a projection lens 8 for projecting a projection image, and a lens cover 10 for protecting the projection lens 8. ing. A power switch 12 and a release button 14 for giving a release instruction are provided on the upper surface of the housing 4.

  The lens cover 10 is slidably provided as shown by the arrow in FIG. That is, when the lens cover 10 is slid by the user's manual operation in the upward arrow direction shown in FIG. 2A, the lens cover 10 is closed, and the lens cover 10 is moved by the user's manual operation in the downward arrow direction shown in FIG. Slide the to open. The lens cover 10 is in a position that prevents the projection lens 8 from being damaged in the closed state, and is in a position where a projection image can be projected from the projection lens 8 in the open state.

  FIG. 3 is a block diagram illustrating a system configuration of the camera according to the embodiment. The camera 2 includes a CPU 16. The CPU 16 includes a power switch 12, a release button 14, an LCD display unit 18 that is provided on the back of the housing 4 and displays captured images, shooting conditions, and the like, and is displayed on the LCD display unit 18. A multi-selector 20 for selecting the imaging conditions and the like, an imaging device 22 configured by a CCD or a CMOS that captures an image of a subject through the imaging lens 6 and generates an imaging signal (analog signal as accumulated charge), an imaging device An image processing unit 24 that performs image processing such as white balance adjustment, contour compensation, and gamma correction on image data generated by performing A / D conversion on an imaging signal output from the A / D conversion unit (not shown); A buffer memory 26 for storing image data generated by the image processing unit 24, captured image data and projection image data, and various data The memory card 28 for storing the data, the projection data 30 for projecting the image data stored in the buffer memory 26 and the memory card 28 and various data, and whether the lens cover 10 is open or closed. A cover detection unit 32 is connected to detect.

  Here, the projection unit 30 includes a light source control unit 36 that controls turning on / off of the LED 34 as a light source and controlling the amount of light emitted from the LED 34 by controlling the drive current of the LED 34, that is, controlling the luminance of the LED 34. A projection control unit 40 that performs display control of the LCOS 38 that displays an image to be displayed.

  Next, processing at the start of projection of the camera according to the embodiment will be described with reference to the flowchart shown in FIG. When the lens cover 10 is in the closed state and the photographing mode for capturing the subject light through the photographing lens 6 by the image sensor 22 is set, the CPU 16 opens the lens cover 10 by the cover detection unit 32. It is determined whether or not (step S1).

  When the lens cover 10 is slid by the user's manual operation and opened, the CPU 16 determines that the lens cover 10 is opened based on the output of the cover detection unit 32, and the projection unit 30 projects the projected image. The projection mode for performing the projection is set (step S2). On the other hand, when the lens cover 10 remains closed, the CPU 16 repeats the process shown in step S1.

  Next, the CPU 16 controls the light source control unit 36 to turn on the LED 34 (step S3), and controls the amount of light emitted from the LED 34 (step S4).

  At this time, first, the CPU 16 controls the light source control unit 36 to suppress the amount of light emitted from the LED 34 for a certain period of time to a substantially constant amount of light (light amount of light emission), and turns on the LED 34. That is, the LED 34 emits light with a substantially constant luminance for a certain period (slight emission period). Thereafter, the CPU 16 controls the light source control unit 36 to increase the light amount emitted from the LED 34 stepwise from the light emission amount by pulse width modulation control (PWM).

  For example, as shown in FIG. 5, the CPU 16 controls the light source control unit 36 to control the amount of light emitted from the LED 34 to 30% of the total amount of light emitted for 3 seconds after lighting, which is a slight light emission period. Here, the total light emission amount is the maximum light amount that can be emitted by the LED 34, and in FIG. 5, the total light emission amount is shown as 100% light amount.

  Next, the CPU 16 controls the light source control unit 34 so that each step is set to 1 second, and the light amount is increased in 10 steps until the total light emission amount is reached. That is, the amount of light is increased by 7% in each step, and the amount of light emitted is 9 seconds after the end of the light emission period.

  Note that the light amount control shown in FIG. 5 is an example, and the slight light emission period is preferably 1 to 5 seconds. If it is shorter than this range, it cannot be sufficiently suggested to the user to start projection, and if it is longer than this range, preparation time until the start of projection becomes longer. Further, the light emission amount is preferably 50% or less of the total light emission amount from the viewpoint of suppressing glare.

  Moreover, it is preferable that the period which increases the light quantity inject | emitted from LED34 after progress of a fine light emission period is 3 to 20 seconds, and this period is set to 5 to 15 seconds, such as 5 seconds, 10 seconds, and 15 seconds. More preferably. If it is shorter than this range, it cannot be sufficiently suggested to the user to start projection, and if it is longer than this range, the preparation time until projection with the amount of all emitted light becomes longer. Moreover, it is preferable that the number of steps which increase the light quantity in the period which increases a light quantity is 5-200 steps, and it is further more preferable that it is 10-100 steps.

  In the processing shown in steps S3 and S4, the CPU 16 controls the projection control unit 40 to display a projection image with low brightness such as a projection image displayed on the LCOS 38, such as a projection image of black or a color close to black. Thereby, the glare at the start of projection can be further suppressed.

  When the amount of light emitted from the LED 34 becomes the amount of all emitted light, the CPU 16 ends the processing shown in the flowchart of FIG. 4 and projects a projected image in the projection mode.

  In addition, when the lens cover 10 is slid by the user's manual operation in the projection mode, the CPU 16 ends the projection mode based on the output of the cover detection unit 32 and sets the shooting mode.

  According to the camera according to the above-described embodiment, glare at the start of projection can be suppressed even when the projection lens cover is manually opened and closed. In addition, it is possible to suggest to the user that projection is started without adding a member.

  In the above-described embodiment, the light amount emitted from the LED 34 by the PWM control is increased stepwise, but may be increased continuously. Further, in the case of increasing stepwise, the light amount emitted from the LED 34 at the time of lighting may be increased stepwise to the total light emission amount while flashing. Moreover, although it was set as the structure which uses LED as a light source, if it is used not only as LED but as a light source, it is not limited to LED.

  Further, in the above-described embodiment, the light amount emitted from the LED 34 is increased to the amount of all light emission, but the light amount considering the projection environment and power consumption, that is, the maximum light amount that can be emitted by the LED 34 is suppressed. It is good also as a setting which makes it increase to the light quantity which did. In this case, in the process shown in step S4 of FIG. 4, the CPU 16 controls the light source control unit 36 to increase the light amount emitted from the LED 34 from the light amount of the light emission to the set light amount.

  In the above-described embodiment, when an operation using the release button 14 or the multi-selector 24 is performed during the control shown in step S4 of FIG. 4, the control of the light amount shown in FIG. The amount of light emitted from the light source may be increased to the amount of all emitted light.

  In the above-described embodiment, the lens cover 10 is slidably provided, but the lens cover 10 may be detachable from the housing 4.

2 ... Camera, 10 ... Lens cover, 30 ... Projection unit, 32 ... Cover detection unit, 34 ... LED, 36 ... Light source control unit

Claims (10)

A projection unit for projection Riga image by the light emitted from the light source,
An operation unit;
When projection of the projection unit is started, the light source is turned on for a certain period with a first light amount, and after the certain period has elapsed, the light source is emitted from the light source to a second light amount that is greater than the first light amount. A light source controller that controls to gradually increase the amount of light
The light source control unit is emitted from the light source when an operation is performed on the operation unit during the certain period or a period in which the light amount emitted from the light source is gradually increased to the second light amount. An electronic device that changes the amount of light to the second amount of light . A cover that protects the projection lens of the projection unit in the closed state and allows light to be emitted from the projection lens in the open state;
A detection unit for detecting an open / closed state of the cover;
A mode setting unit configured to set a projection mode in which the image is projected by the projection unit when the detection unit detects that the cover is in an open state;
An electronic device according to claim 1. The electronic apparatus according to claim 1, wherein the second light amount is a maximum light amount that the light source can emit. The electronic device according to claim 1, wherein the first light amount is a light amount that is 50% or less of the second light amount. The electronic device according to claim 1 , wherein the certain period is 1 second or more and 5 seconds or less. The light source control unit according to any one of claims 1-5 for increasing the amount of light from the first light quantity at least 3 seconds 20 seconds or less period emitted from the light source to the second light intensity Electronics. The electronic device according to claim 1 , wherein the light source control unit increases the amount of light emitted from the light source in a stepwise manner. The electronic device according to claim 1 , wherein the light source control unit continuously increases the amount of light emitted from the light source. A display unit for displaying the image read by the light emitted from the light source;
To any one of claims 1 to 8 and a display control unit that displays the brightness is low the image on the display unit during a period from the lighting of the light source to increase the amount of light emitted from the light source is completed The electronic device described. The electronic apparatus according to claim 1 , further comprising an imaging unit that images a subject.

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