JP2006343770A - Display unit and imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a display unit which converts the number of pixels of an image signal into the number of pixels of a display screen. <P>SOLUTION: The display unit 100 having a plurality of display pixels is provided with: a display part 134 which displays an image in accordance with an image signal composed of a plurality of pixel signals; a D/A converter 128 which converts the image signal of digital signal into an image signal of analog signal and outputs the image signal to a drive circuit; the first semiconductor device 144 having the first drive circuit 126 which drives display pixels arrayed in the vertical or horizontal direction of the display part, based on the image signal output by the D/A converter; and the second semiconductor device 146 forming the second drive circuit 130 which drives display pixels arrayed in the direction different from the direction above mentioned. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a display unit and an imaging apparatus. In particular, the present invention relates to a display unit having a plurality of display pixels.

  Conventionally, an image signal having the number of pixels corresponding to the number of pixels of the display device has been input to the display device. In addition, the image pickup apparatus is equipped with such a display device.

  In this case, a circuit for generating an image signal suitable for the display device must be mounted separately from the display device. Therefore, the number of parts has increased.

  Accordingly, an object of the present invention is to provide a display unit and an imaging apparatus that can solve the above-described problems. This object is achieved by a combination of features described in the independent claims. The dependent claims define further advantageous specific examples of the present invention.

  That is, according to the first aspect of the present invention, a display unit having a plurality of display pixels, a display unit for displaying an image based on an image signal composed of a plurality of pixel signals, and an image signal of a digital signal Is converted into an analog image signal and output to the drive circuit, and display pixels arranged in the vertical or horizontal direction of the display unit based on the image signal output from the D / A converter A first semiconductor device having a first driving circuit for driving; and a second semiconductor device for forming a second driving circuit for driving display pixels arranged in a direction different from the direction.

  The second semiconductor device may further include a DC / DC converter that provides a voltage to the second drive circuit. The second semiconductor device may further include a circuit that provides an average voltage to the second driving circuit.

  The first semiconductor device may further include a gamma correction unit that performs gamma correction on the image signal of the digital signal. The first semiconductor device and the second semiconductor device may be provided on a transmissive substrate.

  An input unit for inputting a horizontal synchronization signal and an image signal and a wiring pattern for outputting the horizontal synchronization signal and the image signal input by the input unit to the first semiconductor device may be provided on the transparent substrate.

  The first semiconductor device may further include a timing setting unit that sets a timing at which the input unit inputs an image signal. The first semiconductor device may further include a vertical synchronization signal generation unit that generates a vertical synchronization signal based on the horizontal synchronization signal.

  The first semiconductor device may further include a pixel number conversion unit that converts the number of pixel signals included in the image signal input by the input unit. In the first semiconductor device, the pixel number conversion unit may be provided at a position closer to the input unit than the first drive circuit.

  In the first semiconductor device, the pixel number conversion unit may be provided at a position closer to the input unit than the D / A converter.

  According to the second aspect of the present invention, there is provided a display unit having a plurality of display pixels, wherein the display unit displays an image based on an image signal composed of a plurality of pixel signals, and the digital signal image signal is analog. A display pixel arranged in the vertical or horizontal direction of the display unit is driven based on a D / A converter that converts the signal into an image signal and outputs the signal to a drive circuit and an image signal output from the D / A converter A semiconductor device forming a first drive circuit and a second drive circuit for driving display pixels arranged in a direction different from the direction;

  According to a third aspect of the present invention, an imaging apparatus including a display unit having a plurality of display pixels, an imaging unit that captures an image, a storage unit that stores an image captured by the imaging unit, and an image memory A display unit that displays a stored image, the display unit displaying an image based on an image signal composed of a plurality of pixel signals, and an image signal of a digital signal as an image signal of an analog signal A D / A converter that converts and outputs to the drive circuit, and a first drive circuit that drives display pixels arranged in the vertical or horizontal direction of the display unit based on the image signal output from the D / A converter And a second semiconductor device forming a second drive circuit for driving display pixels arranged in a direction different from the direction.

  According to a fourth aspect of the present invention, there is provided a semiconductor device for driving a display unit having a plurality of display pixels, a gamma correction unit for gamma correcting an image signal composed of a plurality of pixel signals, and a digital signal image. A D / A converter that converts the signal into an analog image signal and outputs it to the drive circuit, and a display pixel arranged in the vertical or horizontal direction of the display unit based on the image signal output from the D / A converter And a driving circuit for driving.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  As is apparent from the above description, according to the present invention, it is possible to provide a display unit that converts the number of pixels of an image signal into the number of pixels of a display screen.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are the solution of the invention. It is not always essential to the means.

  FIG. 1 is a schematic diagram showing a layout in a digital camera 10 as an example of an imaging apparatus according to the first embodiment. The digital camera 10 includes an imaging unit 20, a storage unit 120, and a display unit 100. The imaging unit 20 captures an image and stores the captured image in the storage unit 120. The display unit 100 displays an image according to the image signal stored in the storage unit 120.

  The display unit 100 includes an input unit 122, a pixel number conversion unit 124, a first drive circuit 126, a D / A converter 128, a second drive circuit 130, a DC / DC converter 132, and a display unit 134. A gamma correction unit 136, a vertical synchronization signal generation unit 138, a timing setting unit 140, and an average voltage generation circuit 142.

  The first driving circuit 126 is integrated with the pixel number conversion unit 124, the gamma correction unit 136, the D / A converter 128, the vertical synchronization signal generation unit 138, and the timing setting unit 140 on the same first semiconductor device 144. Formed.

  The second drive circuit 130 is integrally formed on the same second semiconductor device 146 as the DC / DC converter 132 and the average voltage generation circuit 142.

  Thus, the DC / DC converter 132 and the average voltage generation circuit 142 are formed integrally with the second drive circuit 130 on the second semiconductor device 146, and the pixel number conversion unit 124, the gamma correction unit 136, the D / D By forming the A converter 128, the vertical synchronization signal generation unit 138, and the timing setting unit 140 integrally with the first driving circuit 126 on the first semiconductor device 144, the display unit 100 can be reduced in size. . In addition, the circuit design can be simplified.

  The display unit 134 displays a full color image. As the display unit 134, for example, a liquid crystal display element is used. For example, cholesteric liquid crystal is used as the liquid crystal display element. Cholesteric liquid crystal is sandwiched between transmissive substrates that transmit visible light, such as glass and transparent resin. A plurality of transparent electrodes are formed in a matrix on the front and back surfaces of the transparent substrate. A voltage is applied to a portion where the electrodes intersect to constitute one pixel. The liquid crystal display element is in a selective reflection state when a voltage is applied, and strongly reflects only a light beam having a specific wavelength. The liquid crystal display element includes a red layer that displays red by switching between a red selective reflection state and a transparent state, a green layer that displays green by switching between a green selective reflection state and a transparent state, and a blue selective reflection state. And a blue layer displaying blue by switching between the transparent state and the transparent state.

  The display unit 134 is driven by, for example, an active matrix driving method. The display unit 134 is provided with a switching element for each pixel. The switching element is composed of, for example, a thin film transistor or a thin film diode. The switching element applies a driving voltage to the liquid crystal display element of the display unit 134. The second drive circuit 130 turns on or off the switching element of the display unit 134. The first drive circuit 126 applies a voltage based on the image signal to the switching element in synchronization with the second drive circuit 130.

  The input unit 122 inputs an image signal composed of a plurality of pixel signals from the storage unit 120 together with a horizontal synchronization signal. The input unit 122 sends the input image signal to the pixel number conversion unit 124. The input unit 122 sends the input horizontal synchronization signal to the vertical synchronization signal generation unit 138.

  The pixel number conversion unit 124 subtracts the number of pixel signals included in the received image signal. The number of pixel signals included in the image signal captured by the imaging unit 20 is larger than the number of pixel signals displayed by the display unit 134. Therefore, the pixel number conversion unit 124 reduces the number of pixel signals included in the image signal captured by the imaging unit 20 to the number of pixel signals displayed on the display unit 134. The pixel number conversion unit 124 sends an image signal obtained by subtracting the number of pixel signals to the gamma correction unit 136.

  The gamma correction unit 136 performs density gradation conversion of the image signal received from the pixel number conversion unit 124 using, for example, an LUT (Look Up Table). In the LUT, the gamma correction unit 136 reads the corrected pixel signal associated with each pixel signal, and sends the read pixel signal to the D / A converter 128. The D / A converter 128 converts the image signal received by the D / A converter 128 from a digital signal to an analog signal and sends the converted signal to the first drive circuit 126.

  For example, the vertical synchronization signal generation unit 138 acquires the number of clocks of the horizontal synchronization signal, calculates the number of pixels in one line using the acquired number of clocks, and generates the vertical synchronization signal based on the number of pixels in one line. The vertical synchronization signal generation unit 138 sends the generated vertical synchronization signal to the timing setting unit 140 together with the horizontal synchronization signal. In addition, the vertical synchronization signal generation unit 138 sends the vertical synchronization signal and the horizontal synchronization signal to the first drive circuit 126.

  The first drive circuit 126 amplifies the analog image signal received from the D / A converter 128. The first driving circuit 126 applies a voltage to the horizontal switching element of the display unit 134 based on the amplified analog image signal, the vertical synchronization signal, and the horizontal synchronization signal.

  The vertical synchronization signal generation unit 138 generates a vertical synchronization signal based on the horizontal synchronization signal received from the input unit 122. The timing setting unit 140 generates a clock signal indicating the timing for displaying the image signal on the display unit 134 based on the vertical synchronization signal and the horizontal synchronization signal received from the vertical synchronization signal generation unit 138. The pixel number converter 124 sends the generated clock signal to the second drive circuit 130 in synchronization with the timing at which the D / A converter 128 sends the image signal to the first drive circuit 126.

  The DC / DC converter 132 receives a DC voltage, boosts the input DC voltage, and outputs the boosted DC voltage to the second drive circuit 130. For example, the DC / DC converter 132 boosts a voltage of 5V to 8V or 12V. The average voltage generation circuit 142 acquires an average voltage calculated from the horizontal synchronization signal and the vertical synchronization signal and provides the average voltage to the second driving circuit 130.

  The second driving circuit 130 receives a clock signal for displaying an image signal on the display unit 134 from the timing setting unit 140, and based on the received clock signal, the vertical switching element of the display unit 134 is turned on or off. To. The second drive circuit 130 turns on or off the vertical switching element of the display unit 134 using the power supply voltage input from the DC / DC converter 132 and the average voltage provided by the average voltage generation circuit. To do.

(Second Embodiment)
FIG. 2 is a block diagram showing a characteristic configuration of the digital camera 10 as an example of an imaging apparatus according to the second embodiment. The display unit 100 according to the second embodiment is different from the display unit 100 according to the first embodiment in that the D / A converter 128 is provided at a position away from the input unit 122.

  In the second embodiment, the pixel number conversion unit 124 is provided at a position closer to the input unit 122 than the first drive circuit 126 and the D / A converter 128.

  Usually, since the number of pixel signals input to the display unit 100 is larger than the number of pixel signals displayed on the display unit 134, the pixel number conversion unit 124 reduces the number of pixel signals included in the image signal. Therefore, the pixel number conversion unit 124 receives high-frequency digital data from the input unit 122, and thus may cause noise to be mixed into other circuits. Therefore, by providing the pixel number conversion unit 124 according to the present embodiment in the vicinity of the input unit 122 and in the vicinity of the corner of the display unit 134, the possibility of introducing noise into other circuits or the like can be reduced. it can. In particular, since the pixel number conversion unit 124 is adjacent to the D / A converter 128, there is a high possibility that noise will be mixed into the analog data output from the D / A converter 128. Therefore, by providing the D / A converter 128 at a position away from the pixel number conversion unit 124 and the input unit 122, the possibility of mixing noise into the D / A converter 128 can be reduced.

  By providing the pixel number conversion unit 124 on the transparent substrate of the display unit 100 in this way, the display unit 100 can input an image signal before converting the number of pixels. As a result, the digital camera 10 does not have to be provided with the pixel number conversion unit outside the display unit 100, and can be further downsized.

  Other configurations and operations of the digital camera 10 according to the second embodiment other than this are the same as the configurations and operations of the digital camera 10 according to the first embodiment, and thus description thereof is omitted.

(Third embodiment)
FIG. 3 is a block diagram showing a characteristic configuration of the digital camera 10 as an example of an imaging apparatus according to the third embodiment. The display unit 100 of the digital camera 10 according to the third embodiment is the same as that of the first embodiment in that the first drive circuit 126 and the second drive circuit 130 are provided on the same semiconductor device. Different from the display unit 100.

  The display unit 100 according to the third embodiment includes a display unit 134, a third semiconductor device 148, and an input unit 122. A pixel number conversion unit 124, a gamma correction unit 136, a D / A converter 128, a first drive circuit 126, a vertical synchronization signal generation unit 138, a timing setting unit 140, a second drive circuit 130, The DC / DC converter 132 and the Vcom 142 are provided on the third semiconductor device 148 that is the same semiconductor device.

  Thus, by providing the first drive circuit 126, the second drive circuit 130, and the D / A converter 128 on the same semiconductor device, a drive circuit can be provided on one side of the display portion 134. Therefore, the display unit 100 can be further downsized.

  Further, the D / A converter 128 is provided in the vicinity of the end portion or on the side portion on the third semiconductor device 148. The pixel number conversion unit 124 is provided in the vicinity of an end different from the end where the D / A converter 128 is provided, or on a side different from the side where the D / A converter 128 is provided. Furthermore, the DC / DC converter 132 is provided in the vicinity of the end different from the end where the D / A converter 128 is provided, or on a side different from the side provided with the D / A converter 128. In general, the pixel number conversion unit 124 and the DC / DC converter 132 may mix noise in the D / A converter 128. Therefore, by providing the D / A converter 128 at a position away from the pixel number conversion unit 124 and the DC / DC converter 132, the possibility of noise being mixed into the DC / DC converter 132 can be reduced.

  Other configurations and operations of the digital camera 10 according to the third embodiment other than the above are the same as the configurations and operations of the digital camera 10 according to the first embodiment, and thus description thereof is omitted.

(Fourth embodiment)
FIG. 4 is a block diagram showing a characteristic configuration of the digital camera 10 as an example of an imaging apparatus according to the fourth embodiment. The display unit 100 of the digital camera 10 according to the fourth embodiment is the display unit 100 according to the first embodiment in that a DC / DC converter 132 and a Vcom 142 are provided on the first semiconductor device 144. And different.

  That is, the pixel number conversion unit 124, the gamma correction unit 136, the D / A converter 128, the vertical synchronization signal generation unit 138, the timing setting unit 140, the DC / DC converter 132, the Vcom 142, and the first drive. A circuit 126 is provided on the first semiconductor device 144. Other configurations and operations of the digital camera 10 according to the third embodiment other than the above are the same as the configurations and operations of the digital camera 10 according to the first embodiment, and thus description thereof is omitted.

  FIG. 5 shows a configuration of a digital camera 10 as an example of an imaging apparatus. The configuration of the digital camera 10 in FIG. 5 is a configuration common to the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. The digital camera 10 includes an imaging unit 20, an imaging control unit 40, a system control unit 60, a display unit 100, an operation unit 110, a storage unit 120, an image processing unit 160, and an external connection unit 150. The imaging unit 20 of FIG. 1 is an example of the imaging unit 20 of FIG. 5, the storage unit 120 of FIG. 1 is an example of the storage unit 120 or the optional device 76 of FIG. 5, and the display unit 100 of FIG. This corresponds to the display unit 100 of FIG.

  The imaging unit 20 includes a photographic lens unit 22, a diaphragm 24, a shutter 26, an optical LPF 28, a CCD 30, an imaging signal processing unit 32, a finder 34, and a strobe 36.

  The taking lens unit 22 takes in a subject image and performs processing. The photographing lens unit 22 includes a focus lens, a zoom lens, and the like, and forms a subject image on the light receiving surface of the CCD 30. The stop 24 stops light that has passed through the photographing lens unit 22, and the optical LPF 28 passes wavelength components that are longer than a predetermined wavelength included in the light that has passed through the stop 24. Each sensor element of the CCD 30 accumulates charges according to the amount of light of the imaged subject image (hereinafter, the charges are referred to as “accumulated charges”).

  The shutter 26 is a mechanical shutter and controls whether or not the CCD 30 is exposed to the light that has passed through the photographing lens unit 22. The digital camera 10 may have an electronic shutter function instead of the shutter 26. In order to realize the electronic shutter function, the sensor element of the CCD 30 has a shutter gate and a shutter drain. By driving the shutter gate, the accumulated charge is swept out to the shutter drain. By controlling the shutter gate, the time for accumulating charges in each sensor element, that is, the shutter speed can be controlled. In the CCD 30, the accumulated charge is read to the shift register by a read gate pulse, and sequentially read as a voltage signal by a register transfer pulse.

  The imaging signal processing unit 32 color-separates a voltage signal indicating an object image output from the CCD 30, that is, an analog signal, into R, G, and B components. Then, the imaging signal processing unit 32 adjusts the white balance of the subject image by adjusting the R, G, and B components. The imaging signal processing unit 32 performs gamma correction on the subject image. The imaging signal processing unit 32 performs A / D conversion on the analog signal decomposed into R, G, and B components, and digital image data (hereinafter referred to as “digital image data”) of the subject image obtained as a result. Output to the system control unit 60. The operation of the image output apparatus 200 in FIG. 1 may be performed by the imaging signal processing unit 32 as an example.

  The finder 34 may have a display means, and may display various types of information from the main CPU 62 described later in the finder 34. The strobe 36 has a discharge tube 37 that discharges the energy stored in the capacitor, and functions when the discharge tube 37 emits light when energy is supplied to the discharge tube 37.

  The imaging control unit 40 includes a lens driving unit 42, a focus driving unit 44, an aperture driving unit 46, a shutter driving unit 48, an imaging system CPU 50 that controls them, a distance measuring sensor 52, and a photometric sensor 54. The lens driving unit 42, the focus driving unit 44, the aperture driving unit 46, and the shutter driving unit 48 each have driving means such as a stepping motor, and drive a mechanism member included in the imaging unit 20. In response to pressing of a release switch 114 described later, the distance measuring sensor 52 measures the distance to the subject, and the photometric sensor 54 measures the subject brightness. The distance measuring sensor 52 and the photometric sensor 54 respectively measure the measured distance to the subject (hereinafter simply referred to as “distance data”) and the subject luminance data (hereinafter simply referred to as “photometric data”). It supplies to CPU50.

  The imaging system CPU 50 adjusts the zoom magnification and focus of the photographing lens 22 by controlling the lens driving unit 42 and the focus driving unit 44 based on photographing information such as zoom magnification designated by the user. Further, the imaging system CPU 50 may adjust the zoom magnification and focus by controlling the lens driving unit 42 and the focus driving unit 44 based on the distance measurement data received from the distance measuring sensor 52.

  The imaging system CPU 50 determines the aperture value and the shutter speed based on the photometric data received from the photometric sensor 54. In accordance with the determined values, the aperture driving unit 46 and the shutter driving unit 48 respectively control the aperture amount of the aperture 24 and the opening / closing of the shutter 26.

  Further, the imaging system CPU 50 controls the light emission of the strobe 36 based on the photometric data received from the photometric sensor 54 and adjusts the aperture amount of the aperture 24 at the same time. When the user instructs to capture an image, the CCD 30 starts charge accumulation, and outputs the accumulated charge to the imaging signal processing unit 32 after a lapse of the shutter time calculated from the photometric data.

  The system control unit 60 includes a main CPU 62, a character generation unit 84, a timer 86, and a clock generation unit 88. The main CPU 62 controls the entire digital camera 10, particularly the system control unit 60. The main CPU 62 exchanges necessary information with the imaging CPU 50 by serial communication or the like.

  The clock generator 88 generates an operation clock for the main CPU 62 and supplies it to the main CPU 62. The clock generator 88 generates an operation clock for the imaging system CPU 50 and the display unit 100. The clock generator 88 may supply operation clocks having different frequencies to the main CPU 62, the imaging system CPU 50, and the display unit 100.

  The character generation unit 84 generates character information and graphic information to be combined with a captured image such as a shooting date and time and a title. The timer 86 is backed up by a battery or the like, for example, always counts time, and supplies time information such as information related to the shooting date and time of the shot image to the main CPU 62 based on the count value. It is desirable that the timer 86 counts the time even when the power source of the digital camera body is off by the power supplied from the storage battery. The character generation unit 84 and the timer 86 are preferably provided in the main CPU 62.

  The storage unit 120 includes a memory control unit 64, a nonvolatile memory 66, and a main memory 68. The memory control unit 64 controls the nonvolatile memory 66 and the main memory 68. The non-volatile memory 66 is composed of an EEPROM (electrically erasable and programmable ROM), a FLASH memory, or the like, and should be retained even when the power of the digital camera 10 is off, such as setting information and adjustment values at the time of shipment. Store the data. The nonvolatile memory 66 may store a boot program, a system program, and the like for the main CPU 62.

  The main memory 68 is preferably composed of a relatively inexpensive memory having a large capacity, such as a DRAM. The main memory 68 has a function as a frame memory for storing data output from the imaging unit 20, a function as a system memory for loading various programs, and other functions as a work area. The nonvolatile memory 66 and the main memory 68 exchange data with each unit inside and outside the system control unit 60 via the bus 82. The nonvolatile memory 66 may further store digital image data.

  The image processing unit 160 includes a YC processing unit 70, an encoder 72, and a compression / decompression processing unit 78. The external connection unit 150 includes an optional device control unit 74 and a communication I / F unit 80.

  The YC processing unit 70 performs YC conversion on the digital image data, and generates a luminance signal Y and color difference (chroma) signals BY and RY. The main memory 68 stores the luminance signal and the color difference signal based on the control of the memory control unit 64.

  The compression / decompression processing unit 78 sequentially reads out the luminance signal and the color difference signal from the main memory 68 and compresses them. Then, the option device control unit 74 writes the compressed digital image data (hereinafter simply referred to as “compressed data”) to a memory card that is an example of the option device 76. The option device 76 may perform the operation of the image output device 200 of FIG.

  The encoder 72 converts the luminance signal and the color difference signal into a video signal (NTSC or PAL signal) and outputs it from the terminal 90. When a video signal is generated from the compressed data recorded in the option device 76, the compressed data is first supplied to the compression / decompression processing unit 78 via the option device control unit 74. Subsequently, the data that has undergone the necessary decompression processing in the compression / decompression processing unit 78 is converted into a video signal by the encoder 72.

  The optional device control unit 74 performs necessary signal generation, logical conversion, and / or voltage conversion between the bus 82 and the optional device 76 in accordance with the signal specifications allowed by the optional device 76 and the bus specifications of the bus 82. . The digital camera 10 may support, for example, a standard I / O card conforming to PCMCIA as the optional device 76 in addition to the memory card described above. In this case, the option device control unit 74 may be configured by a PCMCIA bus control LSI or the like.

  The communication I / F unit 80 performs control such as protocol conversion according to communication specifications supported by the digital camera 10, such as USB, RS-232C, Ethernet, and the like. The communication I / F unit 80 may output the compressed data or digital image data to an external device including a network via the terminal 92. The communication I / F unit 80 includes a driver IC as necessary, and communicates with an external device via a terminal 92. The communication I / F unit 80 may be configured to exchange data with an external interface such as a printer, a karaoke machine, or a game machine.

  The display unit 100 includes an LCD monitor 102, an LCD panel 104, a monitor driver 106, and a panel driver 108. The monitor driver 106 controls the LCD monitor 102. The panel driver 108 controls the LCD panel 104. The LCD monitor 102 is provided on the rear side of the camera with a size of about 2 inches, for example, and the current shooting / playback mode, zoom magnification for shooting / playback, battery level, date / time, mode setting screen, subject image, etc. Is displayed. The LCD panel 104 is a small black-and-white LCD provided on the upper surface of the camera, for example, and displays information such as image quality (FINE / NORMAL / BASIC, etc.), strobe emission / prohibition, standard number of shoots, number of pixels, battery capacity / remaining capacity, etc. .

  The operation unit 110 includes a power switch 112, a release switch 114, a function setting unit 116, and a zoom switch 118. The power switch 112 turns on / off the power of the digital camera 10 based on a user instruction. The release switch 114 has a two-stage pushing structure of half-pressing and full-pressing. As an example, when the release switch 114 is half-pressed, the imaging control unit 40 performs automatic focus adjustment and automatic exposure adjustment, and when fully pressed, the imaging unit 20 captures a subject image.

  The function setting unit 116 is, for example, a rotary mode dial or a cross key, and accepts settings such as “file format”, “special effect”, “print”, “decision / save”, “display switching”, and the like. The zoom switch 118 receives the setting of the zoom magnification of the subject image acquired by the imaging unit 20.

  The main operation of the above configuration is as follows. First, the power switch 112 is pressed to supply power to each part of the digital camera 10. The main CPU 62 reads the state of the function setting unit 116 to determine whether the digital camera 10 is in the shooting mode or the playback mode.

  When the digital camera 10 is in the shooting mode, the main CPU 62 monitors the half-pressed state of the release switch 114. When the half-pressed state of the release switch 114 is detected, the imaging system CPU 50 obtains photometry data and distance measurement data from the photometry sensor 54 and the distance measurement sensor 52, respectively. The imaging control unit 40 adjusts the focus, aperture, and the like of the imaging unit 20 based on the photometry data and the distance measurement data obtained by the imaging system CPU 50. When the adjustment is completed, the LCD monitor displays characters such as “standby” to inform the user accordingly.

  Subsequently, the main CPU 62 monitors the fully pressed state of the release switch 114. When the fully depressed state of the release switch 114 is detected, the shutter 26 is closed after a predetermined shutter time, and the accumulated charge of the CCD 30 is swept out to the imaging signal processing unit 32. Digital image data generated as a result of processing by the imaging signal processing unit 32 is output to the bus 82. The digital image data is temporarily stored in the main memory 68, then processed by the YC processing unit 70 and the compression / decompression processing unit 78, and recorded in the option device 76 via the option device control unit 74. The captured image based on the recorded digital image data is displayed on the LCD monitor 102 for a while in a frozen state, and the user can confirm the captured image. This completes a series of shooting operations.

  On the other hand, when the digital camera 10 is in the playback mode, the main CPU 62 reads out the photographed image taken from the main memory 68, the nonvolatile memory 66, and / or the option device 76 and displays it on the LCD monitor 102 of the display unit 100. .

  In this state, when the user instructs “forward” and “reverse” in the function setting unit 116, the main CPU 62 displays other captured images stored in the main memory 68, the nonvolatile memory 66, and / or the option device 76. This is read and displayed on the LCD monitor 102 of the display unit 100.

  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. Various changes or improvements can be added to the above embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

1 is a schematic diagram showing a layout in a digital camera 10 as an example of an imaging apparatus according to a first embodiment. It is a block diagram which shows the characteristic structure in the digital camera 10 as an example of the imaging device which concerns on 2nd Embodiment. It is a figure which shows the structure of the digital camera 10 as an example of an imaging device. It is a block diagram which shows the characteristic structure in the digital camera 10 as an example of the imaging device which concerns on 4th Embodiment. It is a figure which shows the structure of the digital camera 10 as an example of an imaging device.

Explanation of symbols

20 imaging unit 120 storage unit 122 input unit 124 pixel number conversion unit 126 first drive circuit 128 D / A converter 130 second drive circuit 132 DC / DC converter 134 display unit 136 gamma correction unit 138 vertical synchronization signal generation unit 140 Timing setting unit 144 First semiconductor device 146 Second semiconductor device

Claims (14)

A display unit having a plurality of display pixels,
A display unit that displays an image based on an image signal composed of a plurality of pixel signals;
A D / A converter that converts the image signal of the digital signal into an image signal of an analog signal and outputs it to the drive circuit, and the vertical or vertical of the display unit based on the image signal output from the D / A converter A first semiconductor device having a first drive circuit for driving the display pixels arranged in a horizontal direction;
And a second semiconductor device forming a second drive circuit for driving the display pixels arranged in a direction different from the direction.   The display unit according to claim 1, wherein the second semiconductor device further includes a DC / DC converter that provides a voltage to the second driving circuit.   The display unit according to claim 1, wherein the second semiconductor device further includes a circuit that provides an average voltage to the second driving circuit.   The display unit according to claim 1, wherein the first semiconductor device further includes a gamma correction unit that performs gamma correction on the image signal of the digital signal.   The display unit according to claim 1, wherein the first semiconductor device and the second semiconductor device are provided on a transmissive substrate. On the transparent substrate,
An input unit for inputting a horizontal synchronization signal and the image signal;
The display unit according to claim 5, further comprising: a wiring pattern that outputs the horizontal synchronization signal and the image signal input from the input unit to the first semiconductor device.   The display unit according to claim 6, wherein the first semiconductor device further includes a timing setting unit that sets a timing at which the input unit inputs the image signal.   The display unit according to claim 6, wherein the first semiconductor device further includes a vertical synchronization signal generation unit that generates the vertical synchronization signal based on the horizontal synchronization signal.   The display unit according to claim 6, wherein the first semiconductor device further includes a pixel number conversion unit that converts the number of the pixel signals included in the image signal input by the input unit. In the first semiconductor device,
The display unit according to claim 9, wherein the pixel number conversion unit is provided at a position closer to the input unit than the first drive circuit. In the first semiconductor device,
The display unit according to claim 9, wherein the pixel number conversion unit is provided at a position closer to the input unit than the D / A converter. A display unit having a plurality of display pixels,
A display unit that displays an image based on an image signal composed of a plurality of pixel signals;
A D / A converter that converts the image signal of the digital signal into an image signal of an analog signal and outputs it to the drive circuit, and the vertical or vertical of the display unit based on the image signal output from the D / A converter A semiconductor device that forms a first drive circuit that drives the display pixels arranged in a horizontal direction and a second drive circuit that drives the display pixels arranged in a direction different from the direction; A display unit characterized by An imaging device including a display unit having a plurality of display pixels,
An imaging unit that captures an image;
A storage unit for storing the image captured by the imaging unit;
A display unit for displaying the image stored in the image memory,
The display unit is
A display unit that displays an image based on an image signal composed of a plurality of pixel signals;
A D / A converter that converts the image signal of the digital signal into an image signal of an analog signal and outputs it to the drive circuit, and the vertical or vertical of the display unit based on the image signal output from the D / A converter A first semiconductor device having a first drive circuit for driving the display pixels arranged in a horizontal direction;
An imaging apparatus comprising: a second semiconductor device that forms a second driving circuit that drives the display pixels arranged in a direction different from the direction. A semiconductor device for driving a display unit having a plurality of display pixels,
A gamma correction unit for gamma correcting an image signal composed of a plurality of pixel signals;
A D / A converter that converts an image signal of a digital signal into an image signal of an analog signal and outputs the converted signal to the drive circuit;
A semiconductor device comprising: a drive circuit that drives the display pixels arranged in a vertical or horizontal direction of the display portion based on the image signal output from the D / A converter.

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