JP2012222407A - Imaging apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of a conventional imaging apparatus in which when the brightness of a subject image displayed on a display device changes, a user sometimes hesitates in judgment on whether the change is caused by the brightness of the peripheral environment or a change in an exposure value.SOLUTION: The imaging apparatus is provided with: a display part; an illuminance detection part which detects the peripheral brightness; a storage part which stores plural pieces of illuminance information detected by the illuminance detection part; an acceptance part which accepts an instruction to switch a display mode in the display part; and a display control part which when the acceptance part accepts the instruction to switch the display mode, determines the luminance of the display part from the pieces of illuminance information stored in the storage part.

Description

  The present invention relates to an imaging apparatus.

In order to alleviate the discomfort that the user feels due to the difference in brightness between the observation screen of the display device and the surrounding environment, a technique for acquiring the illuminance of the surrounding environment with a sensor and changing the luminance of the light source of the display device is known .
[Prior art documents]
[Patent Literature]
[Patent Document 1] JP-A-2004-264668 [Patent Document 2] JP-A-2009-204920

  When displaying a subject image on a display device provided in a camera, for example, when performing a live view display that sequentially displays a subject image, when the brightness of the displayed subject image changes, the user In some cases, it is difficult to determine whether the change is caused by the brightness of the surrounding environment or the exposure value.

  In order to solve the above problems, in one aspect of the imaging apparatus of the present invention, a display unit, an illuminance detection unit that detects ambient brightness, and a plurality of illuminance information detected by the illuminance detection unit are stored. A storage unit, a reception unit that receives a display mode switching instruction in the display unit, and when the reception unit receives the switching instruction, the brightness of the display unit is determined based on a plurality of illuminance information stored in the storage unit A display control unit.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

1 is a system configuration diagram of a camera according to an embodiment. It is a rear view of the camera which shows a mode that a to-be-photographed image is displayed during video recording. It is explanatory drawing explaining the data format of an illumination table. It is a flowchart explaining the operation | movement regarding display control. It is a flowchart explaining the process of a brightness | luminance calculation.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is a system configuration diagram of a camera 10 according to the present embodiment. The camera 10 includes a system control unit 11 and directly or indirectly controls each element constituting the camera 10. The system control unit 11 communicates with the system memory 12. The system memory 12 is an electrically erasable / recordable non-volatile memory, and is composed of, for example, an EEPROM (registered trademark). The system memory 12 records constants, variables, setting values, programs, and the like necessary when the camera 10 operates so that they are not lost even when the camera 10 is not operating. In particular, various setting values set by the user are classified into a plurality of menu items of the camera 10 according to the type, and are managed together with a menu screen presented to the user.

  The camera 10 includes an optical system 20. The optical system 20 is mainly configured by a zoom lens, a focus lens, a lens group 21 including a camera shake correction lens, and a lens shutter 22. The subject image enters the optical system 20 along the optical axis and forms an image on the imaging surface of the image sensor 31.

  The imaging element 31 is an element that photoelectrically converts an optical image that is a subject image that is transmitted through the optical system 20 and is, for example, a CCD or CMOS sensor. The subject image photoelectrically converted by the image sensor 31 is converted from an analog signal to a digital signal by the A / D converter 32.

  The subject image converted into the digital signal is sequentially processed as image data. The image data converted into a digital signal by the A / D converter 32 is temporarily stored in the internal memory 34 under the control of the memory control unit 33. The internal memory 34 is a random access memory that can be read and written at high speed, and for example, a DRAM, an SRAM, or the like is used. The internal memory 34 serves as a buffer memory that waits for the order of image processing when image data is continuously generated at high speed in continuous shooting and moving image shooting. The image processing unit 35 also serves as a work memory in the image processing and compression processing performed by the image processing unit 35, and also serves to temporarily store image data processed for a predetermined purpose. Furthermore, constants, variables, setting values, programs, and the like recorded in the system memory 12 are appropriately developed and used for controlling the camera 10. Therefore, the internal memory 34 has a sufficient memory capacity corresponding to these roles. The memory control unit 33 controls how much memory capacity is allocated to what work.

  The image processing unit 35 converts the image data into an image file according to a predetermined image format in accordance with the set shooting mode and an instruction from the user. For example, when a JPEG file is generated as a still image, image processing such as color conversion processing, gamma processing, and white balance processing is performed, and then adaptive discrete cosine conversion is performed to perform compression processing. Also, when an MPEG file is generated as a moving image, intra-frame coding and inter-frame coding are applied to a frame image as a continuous still image generated by reducing the number of pixels to a compression process. Do.

  The still image file and the moving image file processed by the image processing unit 35 are recorded on the recording medium 50 from the internal memory 34 via the recording medium IF 38 under the control of the memory control unit 33. The recording medium 50 is a non-volatile memory that is configured with a flash memory or the like and is detachable from the camera 10. However, the recording medium 50 is not limited to a removable type, and may be a recording medium such as an SSD built in the camera 10. At this time, the still image file and the moving image file recorded on the recording medium 50 are output to the outside through a wired USB, a wireless LAN, or the like.

  The image data processed by the image processing unit 35 generates display image data in parallel with the image data processed for recording. Normal display image data is image data with a small number of pixels, which is obtained by copying and thinning image data to be processed for recording. That is, normal display image data generated according to the image data processed for recording has RGB information that is the same color information as the recording image data. The display image data generated in this way is converted into an R signal that is a red signal, a G signal that is a green signal, and a B signal that is a blue signal by the display control unit 36 and is output to the display unit 37. At the same time, the display control unit 36 outputs a luminance adjustment signal for adjusting the luminance of the backlight of the display unit 37.

  The display unit 37 is a liquid crystal display unit including an LCD panel and a backlight. The display unit 37 receives the RGB signal and the luminance adjustment signal output from the display control unit 36, and adjusts the luminance of the backlight while generating the gradation of the RGB signal at each pixel of the LCD panel, thereby displaying the display image. Display the data so that it is visible to the user.

  Regardless of the presence or absence of recording, if the image processing unit 35 sequentially generates image data for display according to the output of the image sensor 31 and outputs it to the display unit 37, live view display as a through image can be realized. Therefore, the display unit 37 can realize reproduction display after still image and moving image shooting, and live view display before shooting and during moving image shooting.

  Further, the display control unit 36 can also display the information accompanying the image data to be displayed and the menu screen recorded in the system memory 12 on the display unit 37 alone or superimposed on the display image. . The display control unit 36 prohibits display by the display unit 37 when a non-display instruction is given by operating the operation member 39.

  Although the camera 10 includes a plurality of operation members 39 that receive operations from the user, the system control unit 11 detects that these operation members 39 have been operated, and executes an operation corresponding to the operation. Further, the camera 10 includes a release switch 40 as a kind of the operation member 39. The release switch 40 is composed of push buttons that can be detected in two steps in the push-down direction, and the system control unit 11 detects AF, AE, etc., which are photographing preparation operations by detecting SW1 that is the first-step push. The subject image acquisition operation by the image sensor 31 is executed by detecting SW2 that is the second-stage depression.

  The illuminance sensor 41 detects the brightness of the outside world as an observation environment in which the user observes the display unit 37. The display control unit 36 acquires the detection result and user setting of the illuminance sensor 41 via the system control unit 11, and changes the display control according to the acquisition result. Specific change processing will be described later.

  The zoom lens, focus lens, and camera shake correction lens are controlled by the lens control unit 42, change the angle of view of the subject image, focus a specific area of the subject image on the light receiving surface of the image sensor 31, and cancel camera shake. A stable imaging state is maintained on the light receiving surface of the image sensor 31. The lens shutter 22 is controlled by the exposure control unit 43 to realize the set aperture value and shutter speed.

  FIG. 2 is a rear view of the camera showing how a subject image is displayed during moving image shooting. On the back side of the camera 10, on the back side of the camera 10, in addition to the display unit 37, a seesaw switch 51 for instructing zooming, a cross key 52 for selecting menu items, and a selected item are confirmed. A confirmation button 53, a mode switching button 54 for switching the mode, a display button 55 for switching ON / OFF of display on the display unit 37, a menu button 56 for displaying menu items, and a power button 57 for switching the power ON / OFF of the camera 10 are provided. .

  An illuminance sensor 41 is disposed in the vicinity of the display unit 37. Further, an optical viewfinder 60 is provided on the upper portion of the display unit 37. The optical viewfinder 60 can observe the subject image as an optical image. Therefore, the user can observe the subject image without performing the live view display by the display unit 37, so that the power consumption can be avoided.

  In the figure, the display unit 37 shows a live view display for displaying a subject image during moving image shooting. The display control unit 36 superimposes the character information “REC” indicating that the moving image is being captured and the icon on the subject image, and also superimposes a message indicating that the backlight brightness is fixed. The backlight brightness adjustment will be described later.

  FIG. 3 is an explanatory diagram illustrating a data format of an illuminance table that stores illuminance value data. In the present embodiment, the display control unit 36 adjusts the luminance of the backlight of the display unit 37 according to the output of the illuminance sensor 41 that detects the brightness in the surrounding environment of the display unit 37. However, instead of sequentially reflecting the output of the illuminance sensor 41, the luminance is adjusted using the data of the illuminance table stored in the system memory 12 according to the situation.

  The camera 10 determines an exposure value based on the photometric result of the subject and further based on an exposure correction instruction from the user. The exposure control unit 43 drives the lens shutter 22 with the determined exposure value. Accordingly, when the photometric result changes or when exposure correction is performed according to a user instruction, a change in brightness appears in the subject image of the live view display during composition adjustment of still image shooting and during moving image shooting. The user checks whether a desired exposure value is realized while visually recognizing the subject image displayed in the live view.

  On the other hand, when the display control unit 36 sequentially reflects the output of the illuminance sensor 41 to change the luminance of the backlight of the display unit 37, the user changes the brightness of the subject image displayed on the display unit 37. In some cases, it was difficult to determine whether the exposure value was changed or the brightness of the surrounding environment was changed. If it is accompanied by a change in exposure value, the change in brightness will also appear in the image recorded and recorded, but if it is accompanied by a change in the brightness of the surrounding environment, There is no effect.

  Therefore, in the present embodiment, during live view display in the shooting mode, the output of the illuminance sensor 41 is not sequentially reflected, and the luminance of the backlight is kept constant. In addition, the display control unit 36 does not simply use the output of the illuminance sensor 41 at the start of display, but adjusts the luminance to be constant using the data of the illuminance table stored in the system memory 12.

  As shown in FIG. 2, the illuminance sensor 41 is disposed in the vicinity of the display unit 37. However, the vicinity of the display unit 37 is also in the vicinity of the user's gripping unit, and the illuminance sensor 41 is hidden from the user's finger. It is easy to be done. If the output from the illuminance sensor 41 hidden behind the user's finger is used as it is, the display control unit 36 determines that the surrounding environment is dark and makes an adjustment to increase the luminance of the backlight. Therefore, the system control unit 11 stores the illuminance value calculated by obtaining the output of the illuminance sensor 41 at a constant time interval as an illuminance table, and the display control unit 36 at the start of live view display in the shooting mode. The brightness value of the backlight is determined based on the illuminance table. Thus, by determining the luminance value of the backlight based on the illuminance table, even if the illuminance sensor 41 is hidden by the user's finger at a certain point in time, the subject image has a brightness that is more easily visible to the user. Can be displayed.

  As shown in the figure, two illuminance tables are prepared: a current table and a past table. The current table stores illuminance values calculated after the camera 10 is turned on. On the other hand, the past table stores the illuminance value at the previous use. Each illuminance table is configured to store, for example, four illuminance values together with the acquisition time. In addition, since a new value is calculated for the illuminance value at regular time intervals, the illuminance value is deleted from the oldest acquisition time and rewritten to a new value.

  Therefore, immediately after power-on, there may be a situation where the illuminance values corresponding to all IDs in the current table are not yet available. In addition, each illuminance value stored in the past table is a value calculated in the vicinity of the time when the power is turned off during the previous use. In particular, one of these is the illuminance value calculated from the output of the illuminance sensor 41 acquired together with the power-off instruction. When the power is turned off in the current use state, the system control unit 11 moves each value of the current table to the past table and resets the current table.

  Next, specific display control using this illuminance table will be described. FIG. 4 is a flowchart for explaining operations related to display control. The flow in the figure starts when the power button 57 is pressed and the power of the camera 10 is turned on.

  When the power is turned on, the system control unit 11 first determines in step S101 whether the current mode is a shooting mode. If it is determined that the shooting mode is selected, the process proceeds to step S102, and if it is determined that the reproduction mode or the menu mode is selected, the process proceeds to step S113. Note that the user instructs switching between the shooting mode and the playback mode by depressing the mode switching button 54. Display of menu items is instructed by depressing the menu button 56.

  In step S102, the system control unit 11 obtains the environmental illuminance by obtaining the output of the illuminance sensor 41. That is, the current illuminance value and acquisition time are written in the current table. Then, the process proceeds to step S103, and time measurement is started by the timer variable t.

  When the timer is started, the system control unit 11 first determines whether or not the display of the display unit 37 is turned on in step S104. Note that the user instructs display on / off switching by depressing the display button 55.

  Accordingly, there are at least three display modes of the camera 10: display on and display off in the shooting mode, and display on in the playback / menu mode. In addition, when the shooting mode display is turned on, the display control for each shooting sequence is defined as one display mode in view of the fact that confirmation display immediately after shooting, display during recording processing, etc. are performed for each shooting sequence. You may do it.

  If it is determined in step S104 that the display on the display unit 37 is not turned on, the system control unit 11 determines in step S105 whether or not an instruction to switch to the playback / menu mode has been issued. If no switching instruction has been given, the process proceeds to step S106, and it is determined whether or not a power-off instruction has been given. If no power-off instruction has been given, the process proceeds to step S107.

Step system control unit 11 in S107, it is determined whether the timer variable t has exceeded the interval t ₁ preset time. If not, the process returns to step S104, and monitoring from step S104 to step S107 is continued. During this time, the imaging sequence may be executed without executing the display on the display unit 37.

The system control unit 11, in step S107, the timer variable t is returned to step S102 if it is determined that exceeds the _{t 1,} to obtain the environmental illuminance again. The system control unit 11 adds the calculated illuminance value to the current table as a new value together with the acquisition time. In this manner, are acquired sequentially a new environmental illuminance for each time period t _1, the current table is updated. According to the example of the current table shown in FIG. 3, while accumulating four environmental illuminances, if more environmental illuminances are acquired, the old values are deleted and overwritten.

  When the system control unit 11 determines that the display of the display unit 37 is turned on in step S104, the process proceeds to step S108, and the display control unit 36 uses the illuminance table stored in the system memory 12 to backlight. Is calculated. Specific calculation processing will be described later. When the calculation of the luminance value is completed, the process proceeds to step S109, and the display control unit 36 adjusts the backlight of the display unit 37 by applying the calculated luminance value, and executes live view display. After that, the live view display is continued without adjusting the backlight brightness.

  In step S110, the system control unit 11 determines whether a series of shooting sequences has been completed. Note that the system control unit 11 also executes a series of shooting sequences. For example, in a series of shooting sequences in still image shooting, the system control unit 11 detects the SW1 of the release switch 40 to execute shooting preparation operations such as AF and AE, detects SW2, and detects the subject image by the image sensor 31. Execute the acquisition operation. Further, the system control unit 11 causes the image processing unit 35 to generate, for example, a JPEG file and records it from the internal memory 34 to the recording medium 50 via the recording medium IF 38.

  If the system control unit 11 determines in step S110 that the series of shooting sequences has been completed, the system control unit 11 returns to step S102 again. Then, the ambient illuminance is acquired again. That is, when one shooting sequence is completed, the ambient illuminance is acquired again, the backlight brightness is adjusted again, and the next shooting instruction is awaited. In addition, while the photographing mode is selected, once the display of the display unit 37 is started, the brightness of the backlight may be maintained with the same luminance value.

  If the system control unit 11 determines in step S110 that the series of shooting sequences has not yet been completed, the system control unit 11 proceeds to step S111 and determines whether or not an instruction to switch to the playback / menu mode has been issued. If no switching instruction has been given, the process proceeds to step S112, and it is determined whether or not a power-off instruction has been given. If no power-off instruction has been given, the process returns to step S110 to wait for a shooting instruction.

  If it is determined in step S101 that the playback mode or the menu mode is selected, or if switching to the playback mode or the menu mode is instructed in step S105 or step S111, the process proceeds to step S113. In step S113, the system control unit 11 obtains the output of the illuminance sensor 41 and acquires the environmental illuminance. Then, the calculated illuminance value and acquisition time are written in the current table.

  When the system control unit 11 acquires the environmental illuminance in step S113, the display control unit 36 adjusts the backlight of the display unit 37 by applying the luminance value calculated from the environmental illuminance in step S114, and displays or displays the menu. Execute the display. That is, the output of the previous illuminance sensor 41 is applied as it is without using the illuminance table. Subsequently, the system control unit 11 proceeds to step S115 and starts measuring time by the timer variable t.

  In step S116, the system control unit 11 determines whether an instruction to switch to the shooting mode has been issued. If a switching instruction has been made, the process proceeds to step S102, and if not, the process proceeds to step S117. In step S117, it is further determined whether or not an instruction to turn off the power has been issued. If the power-off instruction has not been given, the process proceeds to step S118.

Step system control unit 11 in S118, it is determined whether the timer variable t has exceeded a preset time interval t _2. If not, the process returns to step S116, and monitoring from step S116 to step S118 is continued. During this time, the system control unit 11 reproduces and displays the specified image using the display control unit 36 in the playback mode, and receives the input of the operation member 39 from the user in the menu mode. Follow the instructions.

The system control unit 11, at step S118, the timer variable t is returned to the step S113 if it is determined that exceeds _{t 2,} obtains the environmental illuminance again. In playback / menu mode, this way, is acquired new environmental illuminance for each time period t ₂ is the brightness of the backlight is sequentially updated. In the case of adjusting the luminance of the backlight by using the illuminance table in the imaging mode, in order to reduce accidental finger retaining influence of the illuminance sensor 41 is set the time interval t ₁ is relatively long . On the other hand, when performing the adjustment to sequentially reflect the output of the illuminance sensor 41 in the playback / menu mode, to respond to changes in the environmental illuminance in real time is set relatively short time interval t _2. That is, there is a relationship of t ₁ > t ₂ .

  If it is determined in step S106, step S112, or step S117 that the power-off has been instructed, the process proceeds to step S119, and the system control unit 11 further acquires environmental illuminance. Then, as described above, the system control unit 11 moves each value of the current table to the past table, resets the current table, and sets the illuminance value and the acquisition time for the environmental illuminance acquired here as the past table. Overwrite the oldest ID. Then, the power is turned off to end the series of processing flows.

FIG. 5 is a flowchart for explaining in detail the luminance calculation processing in step S108 of FIG. As described above, the illuminance values corresponding to all IDs in the current table are not aligned unless a certain time has elapsed since the power was turned on. Therefore, the display control unit 36 in step S201, reads out the current table stored in the system memory 12, checks whether the environment information acquired number written in the current table has reached the prescribed value n _0. For example, according to the current table of FIG. 3, the prescribed value n ₀ can be defined as the same number as the number of storages (= 4). Of course, it may be defined to be less than the stored number.

The display control unit 36 proceeds to the specified value n step S202 if reached _0, the illuminance value of n ₀ pieces of calculating the averaged value, thereby determining the brightness value of the backlight of the display unit 37 (Step S203). When the luminance value is determined, the process proceeds to step S109.

Does not reach the defined value _{n 0} in step S201, the display control unit 36 proceeds to step S204, reads the Past table stored in the system memory 12. In step S205, the current time is acquired.

In step S206, the display control unit 36 calculates the illuminance value by weighted average processing using these pieces of information. Specifically, the weighted average process is performed as follows. First, by the processing in step S119, the ambient illuminance is acquired at the previous power-off, and the illuminance value and the acquisition time are added to the past table. elapsed time from to confirm whether or not exceeded the time T ₀ that has been set in advance. If it exceeds, the illuminance value of the past table is not referred to, and the averaging process is performed using only the calculated illuminance value in the current table.

On the other hand, if not, the illuminance value of the past table is taken into account. That is, the illuminance value acquired at the previous use is referred to as the case where it is estimated that the current use environment of the camera 10 is close to the previous use environment. Accordingly, the time T ₀ is set to such a degree that this assumption is considered to hold.

When referring to the illuminance values in the past table, a weighting coefficient is assigned between 0 and 1 according to the elapsed time calculated from the corresponding acquisition time for each illuminance value. On top of that, it performs the weighted averaging process together with the illuminance value less than the predetermined value n ₀ already described in the current table. That is, the illuminance value in the current table is weighted relatively higher than the illuminance value in the past table, and the weighted average process is performed. The display control unit 36 determines the luminance value of the backlight of the display unit 37 based on the value thus calculated (step S207). When the luminance value is determined, the process proceeds to step S109.

  In addition, you may perform the process which excludes the value which shows an abnormal value among the illumination intensity values contained in a past table and a current table. For example, when a certain illuminance value is smaller or larger than a threshold with respect to the preceding and following illuminance values, it can be determined as an abnormal value. In general, since the visibility is higher when the backlight of the display unit 37 is brighter than when the backlight is dark, the higher the illuminance value, the higher the weighting may be, regardless of the past table or the current table. In addition, about the above weighting, the addition of 0 as a weighting coefficient can also avoid the addition of a specific illumination value.

  As described above with reference to the flowcharts of FIGS. 4 and 5, the display control unit 36 reads the illuminance table stored in the system memory 12 when the system control unit 11 receives a display mode switching instruction. The brightness of the backlight of the display unit 37 is determined. The brightness is not changed at least in the live view display during the single shooting sequence in the shooting mode. On the other hand, during display in the playback / menu mode, the luminance of the backlight is sequentially changed according to the ambient illuminance. Of course, in at least one of the playback mode and the menu mode, the luminance of the backlight may be adjusted with reference to the illuminance table.

  In the above embodiment, the display unit 37 has been described as a liquid crystal display unit. However, a self-luminous display unit such as an organic EL can be applied instead of a liquid crystal. In this case, the brightness of each pixel may be adjusted instead of adjusting the backlight.

  In the above-described embodiment, the camera 10 that is a compact digital camera has been described as an example of the imaging apparatus. However, other types of cameras may be used. Specifically, it can be applied to an interchangeable lens single-lens reflex camera, a mirrorless single-lens camera, a video camera, a camera-equipped mobile phone, and the like.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 10 Camera, 11 System control part, 12 System memory, 20 Optical system, 21 Lens group, 22 Lens shutter, 31 Image pick-up element, 32 A / D converter, 33 Memory control part, 34 Internal memory, 35 Image processing part, 36 Display control unit, 37 Display unit, 38 Recording medium IF, 39 Operation member, 40 Release switch, 41 Illuminance sensor, 42 Lens control unit, 43 Exposure control unit, 50 Recording medium, 51 Seesaw switch, 52 Cross key, 53 Confirm button , 54 Mode switching button, 55 Display button, 56 Menu button, 57 Power button, 60 Optical viewfinder

Claims (11)

A display unit;
An illuminance detector that detects ambient brightness;
A storage unit for storing a plurality of illuminance information detected by the illuminance detection unit;
A receiving unit that receives a display mode switching instruction in the display unit;
An imaging apparatus comprising: a display control unit that determines brightness of the display unit based on the plurality of pieces of illuminance information stored in the storage unit when the reception unit receives the switching instruction.   The imaging apparatus according to claim 1, wherein the display control unit makes the luminance constant until the display mode is switched next time.   The display control unit determines the luminance when the reception unit receives a switching instruction to switch from an off mode that is a non-display state to an on mode that is a display state, as the display mode switching instruction. Or the imaging device of 2.   The display control unit, as the switching instruction of the display mode, the switching instruction to switch from a playback mode for reproducing image data or a menu mode for displaying menu items to a shooting mode for displaying a through image of a subject image. The imaging device according to any one of claims 1 to 3, wherein the brightness is determined when received.   In at least one of the playback mode and the menu mode, the display control unit uses the illuminance information periodically detected by the illuminance detection unit without depending on the plurality of illuminance information stored in the storage unit. The imaging apparatus according to claim 4, wherein the luminance is sequentially changed based on the information.   The imaging apparatus according to claim 5, wherein a detection interval of the plurality of illuminance information stored in the storage unit is longer than a detection interval in the playback mode or the menu mode.   The imaging device according to any one of claims 1 to 6, wherein the display control unit makes the luminance constant until one photographing sequence is completed.   If the plurality of illuminance information stored in the storage unit after the imaging device is turned on is less than a predetermined number, the display control unit The imaging apparatus according to any one of claims 1 to 7, wherein the luminance is determined in consideration of illuminance information stored from the camera.   In the case where the display control unit determines the luminance in consideration of illuminance information stored before the power is turned on, the display control unit stores the plurality of data stored in the storage unit after the power is turned on. The imaging device according to claim 8, wherein the luminance is determined by increasing weighting of the illuminance information.   The said display control part does not consider the illumination intensity information memorize | stored from before turning on the said power supply, when predetermined time has passed since the last power-off of the said power supply. 9. The imaging device according to 9.   The imaging device according to any one of claims 8 to 10, wherein the illuminance information stored before the power is turned on includes illuminance information stored at a timing when the power is turned off last time. .

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