JP2003150124A - Display unit and image pickup unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display unit converting the number of pixels for image signals into the number of pixels for a display screen. SOLUTION: This is a display unit 100 having a plurality of display pixels, and is provided with a display part 134 for displaying a picture based on the picture signals composed of a plurality of pixel signals, a 1st semiconductor device 144 having a D-A converter 128 for converting digital picture signals into analog picture signals to output them to a driving circuit and a 1st driving circuit 126 for driving the display pixels arrayed in the vertical or horizontal direction of the display part, and a 2nd semiconductor device 146 for forming a 2nd driving circuit 130 for driving the display pixels in the direction different from.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display unit and an image pickup device. In particular, the present invention relates to a display unit having a plurality of display pixels.

[0002]

2. Description of the Related Art Conventionally, a display device has been input with an image signal having the number of pixels commensurate with the number of pixels of the display device. Further, the image pickup apparatus is equipped with such a display device.

[0003]

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 was large.

Therefore, an object of the present invention is to provide a display unit and an image pickup device which can solve the above problems. This object is achieved by a combination of features described in independent claims of the invention. The dependent claims define further advantageous specific examples of the present invention.

[0005]

That is, according to the first aspect of the present invention, a display unit having a plurality of display pixels, which displays an image based on an image signal composed of a plurality of pixel signals. Based on the display unit and the D / A converter that converts the image signal of the digital signal into the image signal of the analog signal and outputs it to the drive circuit, and 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 the display pixels arranged in the same direction, and a second semiconductor circuit forming a second driving circuit for driving the display pixels arranged in a direction different from the first direction. And a semiconductor device.

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 drive circuit.

The first semiconductor device may further include a gamma correction unit for gamma-correcting the image signal of the digital signal. The first semiconductor device and the second semiconductor device may be provided on a transparent substrate.

Even if an input portion for inputting the horizontal synchronizing signal and the image signal and a wiring pattern for outputting the horizontal synchronizing signal and the image signal input by the input portion to the first semiconductor device are provided on the transparent substrate. Good.

The first semiconductor device may further include a timing setting section for setting the timing at which the input section inputs the 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 for converting 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 section may be provided at a position closer to the input section than the D / A converter.

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

According to a third aspect of the present invention, there is provided an image pickup device comprising a display unit having a plurality of display pixels,
An image pickup unit for picking up an image, a storage unit for storing the image picked up by the image pickup unit, and a display unit for displaying the image stored in the image memory, and the display unit is an image formed by a plurality of pixel signals. A display unit that displays an image based on the signal, a D / A converter that converts the digital image signal into an analog image signal and outputs the analog image signal, and a D / A converter based on the image signal output by the D / A converter A first semiconductor device having a first drive circuit for driving display pixels arranged in a vertical or horizontal direction of the display section, and a second semiconductor device for driving display pixels arranged in a direction different from the direction. A second semiconductor device forming a drive circuit.

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

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

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the claimed invention, and the features described in the embodiments Not all combinations are essential to the solution of the invention.

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

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

The first drive circuit 126 includes a pixel number conversion unit 1
24, gamma correction unit 136, D / A converter 128,
Vertical synchronization signal generation unit 138 and timing setting unit 14
0 and are integrally formed on the same first semiconductor device 144.

The second driving circuit 130 has the same second circuit as the DC / DC converter 132 and the average voltage generating circuit 142.
Are integrally formed on the semiconductor device 146.

As described above, the DC / DC converter 132 and the average voltage generating circuit 142 are connected to the second semiconductor device 1.
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 are formed integrally with the second drive circuit 130 on the first drive circuit 46. By integrally forming the first drive circuit 126 over the semiconductor device 144, the display unit 100 can be downsized. Also, the circuit design can be simplified.

The display section 134 displays a full-color image. For the display unit 134, for example, a liquid crystal display element is used. As the liquid crystal display element, for example, cholesteric liquid crystal is used. The cholesteric liquid crystal is sandwiched between transparent substrates such as glass and transparent resin that transmit visible light. 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 the intersection of the electrodes to form one pixel. The liquid crystal display element is brought into a selective reflection state when a voltage is applied, and strongly reflects only a light ray having a specific wavelength. The liquid crystal display device has 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 section 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 drive voltage to the liquid crystal display element of the display unit 134. Second drive circuit 130
Turns the switching element of the display unit 134 on or off. 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 section 122 stores the image signal composed of a plurality of pixel signals together with the horizontal synchronizing signal in the storage section 1.
Enter from 20. The input unit 122 sends the input image signal to the pixel number conversion unit 124. The input unit 122 also sends the input horizontal synchronization signal to the vertical synchronization signal generation unit 138.

The pixel number conversion unit 124 reduces the number of pixel signals included in the received image signal. The number of pixel signals included in the image signal captured by the image capturing unit 20 is determined by the display unit 134.
Is larger than the number of pixel signals to be displayed. Therefore, the pixel number conversion unit 124 reduces the number of pixel signals included in the image signal captured by the image capturing unit 20 to the number of pixel signals displayed on the display unit 134. The pixel number conversion unit 124 sends the image signal from which the number of pixel signals has been reduced to the gamma correction unit 136.

The gamma correction unit 136 includes a pixel number conversion unit 12
4, the density gradation conversion of the image signal received from
This is performed using UT (lookup table). The gamma correction unit 136 reads the corrected pixel signal associated with each pixel signal in the LUT 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 into an analog signal, and sends the analog signal to the first drive circuit 126.

The vertical synchronizing signal generator 138 acquires, for example, the number of clocks of the horizontal synchronizing signal, calculates the number of pixels in one line using the acquired number of clocks, and generates the vertical synchronizing signal based on the number of pixels in one line. To generate. 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 outputs the vertical synchronization signal and the horizontal synchronization signal to the first
To the drive circuit 126.

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

The vertical synchronizing signal generating section 138 includes an input section 12
A vertical synchronizing signal is generated based on the horizontal synchronizing signal received from the terminal 2. The timing setting unit 140 generates a clock signal indicating the timing of 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 conversion unit 124 converts the generated clock signal into an image signal by D / A.
The converter 128 sends the image signal to the second drive circuit 130 in synchronization with the timing of sending the image signal to the first drive circuit 126.

The DC / DC converter 132 inputs a DC voltage, boosts the input DC voltage, and outputs it to the second drive circuit 130. The DC / DC converter 132 boosts a voltage of 5V to 8V or 12V, for example. The average voltage generation circuit 142 acquires the average voltage calculated from the horizontal synchronization signal and the vertical synchronization signal, and the second drive circuit 130.
To provide.

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

(Second Embodiment) FIG. 2 shows a digital camera 1 as an example of an image pickup apparatus according to the second embodiment.
FIG. 2 is a block diagram showing a characteristic configuration in 0. The display unit 100 according to the second embodiment is different from the display unit 1 according to the first embodiment in that the D / A converter 128 is provided at a position apart from the input unit 122.
Different from 00.

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

Since the number of pixel signals input to the display unit 100 is usually 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, so that noise may 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, it is possible to reduce the possibility of mixing noise with other circuits. it can. Particularly, 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 by 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,
It is possible to reduce the possibility that noise will be mixed into the A / A converter 128.

By thus providing the pixel number conversion section 124 on the transparent substrate of the display unit 100, the display unit 100 can input the image signal before the pixel number conversion. As a result, the digital camera 10
Since it is not necessary to provide the pixel number conversion unit outside the display unit 100, the size can be further reduced.

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 therefore the description thereof will be omitted.

(Third Embodiment) FIG. 3 shows a digital camera 1 as an example of an image pickup apparatus according to the third embodiment.
FIG. 2 is a block diagram showing a characteristic configuration in 0. The display unit 100 of the digital camera 10 according to the third embodiment includes a first drive circuit 126 and a second drive circuit 1.
First, in that 30 are provided on the same semiconductor device,
Different from the display unit 100 according to the embodiment.

[0038] Display unit 10 according to the third embodiment
0 indicates the display unit 134 and the third semiconductor device 148.
And an input unit 122. A pixel number conversion unit 124,
Gamma correction unit 136, D / A converter 128,
1 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 the same.
Third semiconductor device 148, which is one semiconductor device
Provided on top.

In this way, the first drive circuit 126 and the second drive circuit 126
Since the drive circuit 130 and the D / A converter 128 are provided on the same semiconductor device, the drive circuit can be installed on one side of the display portion 134, so that the display unit 100 can be further downsized. .

The D / A converter 128 is provided near the end of the third semiconductor device 148 or at the side thereof. Then, the pixel number conversion unit 124 uses the D / A converter 1
Near the end different from the end where 28 is provided, or D
It is provided on a side portion different from the side portion on which the / A converter 128 is provided. Further, the DC / DC converter 132
Is provided in the vicinity of an end different from the end provided with the D / A converter 128 or on a side different from the side provided with the D / A converter 128. Normally, the pixel number conversion unit 124 and the DC / DC converter 132 are
Noise may be mixed in the A converter 128. Therefore, the D / A converter 128 is replaced by the pixel number conversion unit 1
By providing the DC / DC converter 132 at a position distant from the DC / DC converter 132, it is possible to reduce the possibility of noise being mixed in the DC / DC converter 132.

Other configurations and operations of the digital camera 10 according to the third embodiment other than this are the same as the configurations and operations of the digital camera 10 according to the first embodiment, and therefore the description thereof will be omitted.

(Fourth Embodiment) FIG. 4 shows a digital camera 1 as an example of an image pickup apparatus according to the fourth embodiment.
FIG. 2 is a block diagram showing a characteristic configuration in 0. The display unit 100 of the digital camera 10 according to the fourth embodiment includes a DC / DC converter 132 and a Vcom1.
42 is provided on the first semiconductor device 144, which is different from the display unit 100 according to the first embodiment.

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, and the DC / D.
The C converter 132, the Vcom 142, and the first drive circuit 126 are provided on the first semiconductor device 144. Other configurations and operations of the digital camera 10 according to the third embodiment other than this are the same as the configurations and operations of the digital camera 10 according to the first embodiment, and therefore description thereof will be omitted.

FIG. 5 shows the structure of a digital camera 10 as an example of the image pickup apparatus. The configuration of the digital camera 10 in FIG. 5 is 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 the imaging unit 20 of FIG. 5 as an example, and the storage unit 120 of FIG. 1 is the storage unit 120 of FIG.
The display unit 100 of FIG. 1 corresponds to the display unit 100 of FIG. 5 as an example.

The image pickup section 20 includes a photographing lens section 22 and a diaphragm 2.
4, a shutter 26, an optical LPF 28, a CCD 30, an image pickup signal processing unit 32, a finder 34, and a strobe 36.

The taking lens unit 22 takes in a subject image and processes it. The taking 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 the light that has passed through the taking lens unit 22, and the optical LPF 28 allows a wavelength component longer than a predetermined wavelength included in the light that has passed through the stop 24 to pass. Each sensor element of the CCD 30 accumulates electric charge according to the amount of light of the formed subject image (hereinafter, the electric charge is referred to as “accumulated electric charge”).

The shutter 26 is a mechanical shutter,
It controls whether or not the light passing through the taking lens unit 22 is exposed to the CCD 30. Further, 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 charges are read out to the shift register by the read gate pulse and sequentially read out as a voltage signal by the register transfer pulse.

The image pickup signal processing section 32 color-separates the voltage signal indicating the subject image output from the CCD 30, that is, the 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. Imaging signal processing unit 32
Performs gamma correction on the subject image. Then, the imaging signal processing unit 32 A / D-converts the analog signal decomposed into R, G, and B components, and obtains the resulting digital image data of the subject image (hereinafter referred to as “digital image data”). Output to the system control unit 60. Image output device 2 of FIG.
The operation of 00 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 information from the main CPU 62, which will be described later, in the finder 34. The strobe 36 has a discharge tube 37 that discharges the energy stored in the capacitor, and the discharge tube 37 is supplied when the energy is supplied to the discharge tube 37.
Works by emitting light.

The image pickup control section 40 has a lens drive section 42, a focus drive section 44, an aperture drive section 46, a shutter drive section 48, an image pickup system CPU 50 for controlling them, a distance measuring sensor 52, and a photometric sensor 54. Lens drive unit 4
2, the focus driving unit 44, the diaphragm driving unit 46, and the shutter driving unit 48 each have a driving unit such as a stepping motor, and drive a mechanical member included in the imaging unit 20. When the release switch 114, which will be described later, is pressed, the distance measuring sensor 52 measures the distance to the subject, and the photometric sensor 5
4 measures the subject brightness. Then, the distance measuring sensor 52 and the photometric sensor 54 respectively collect data of the measured distance to the subject (hereinafter simply referred to as “distance measuring data”) and subject brightness data (hereinafter simply referred to as “photometric data”). It is supplied to the CPU 50.

The image pickup system CPU 50 uses the lens driving section 42 based on the photographing information such as the zoom magnification designated by the user.
Also, the focus drive unit 44 is controlled to adjust the zoom magnification and focus of the taking lens 22. In addition, the imaging system CPU
The 50 may control the lens driving unit 42 and the focus driving unit 44 based on the distance measurement data received from the distance measuring sensor 52 to adjust the zoom magnification and the focus.

The image pickup system CPU 50 determines the aperture value and the shutter speed based on the photometric data received from the photometric sensor 54. According to the determined value, the diaphragm driving unit 46 and the shutter driving unit 48 respectively control the diaphragm amount of the diaphragm 24 and the opening / closing of the shutter 26.

Further, the image pickup system CPU 50 includes the photometric sensor 5
Based on the photometric data received from
The emission of light is controlled and at the same time, the diaphragm amount of the diaphragm 24 is adjusted.
When the user gives an instruction to capture an image, the CCD 30 starts charge storage, and outputs the stored charge to the imaging signal processing unit 32 after the shutter time calculated from the photometric data has elapsed.

The system control unit 60 includes the main CPU 6
2, a character generator 84, a timer 86, and a clock generator 88. The main CPU 62 controls the entire digital camera 10, particularly the system control unit 60. The main CPU 62 uses an image pickup system CP by serial communication or the like.
Transfer necessary information to and from U50.

The clock generator 88 is used by the main CPU 62.
The operation clock of is generated and supplied to the main CPU 62. The clock generator 88 also generates an operation clock for the image pickup system CPU 50 and the display unit 100. The clock generator 88 includes a main CPU 62 and an image pickup system CPU 5.
Operation clocks of different frequencies may be supplied to 0 and the display unit 100, respectively.

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

The storage section 120 has a memory control section 64, a non-volatile memory 66, and a main memory 68. The memory control unit 64 includes a nonvolatile memory 66 and a main memory 6
8 and control. The non-volatile memory 66 is an EEPROM
(Electrically erasable and programmable ROM) and FLAS
The H memory or the like stores data that should be held even while the power of the digital camera 10 is off, such as user setting information and factory adjustment values. The non-volatile memory 66 may store a boot program for the main CPU 62, a system program, and the like.

The main memory 68 is preferably 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 the data output from the imaging unit 20, a function as a system memory for loading various programs, and a function 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 non-volatile memory 66 may further store digital image data.

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

The YC processing section 70 performs YC conversion on the digital image data to generate a luminance signal Y and color difference (chroma) signals BY and RY. The main memory 68 is
The luminance signal and the color difference signal are stored under the control of the memory control unit 64.

The compression / expansion processing section 78 has a main memory 68.
The luminance signal and the color difference signal are sequentially read from and compressed. Then, the option device controller 74 writes the compressed digital image data (hereinafter simply referred to as “compressed data”) to a memory card, which is an example of the option device 76.
The optional device 76 may operate 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 given to the compression / expansion processor 78 via the option device controller 74. Subsequently, the data subjected to the necessary expansion processing by the compression / expansion processing unit 78 is converted into a video signal by the encoder 72.

The optional device controller 74 generates necessary signals between the bus 82 and the optional device 76, performs logical conversion, and / or voltage conversion according to the signal specifications permitted by the optional device 76 and the bus specifications of the bus 82. And so on. The digital camera 10 may support, for example, a standard PCMCIA-compliant standard I / O card as the optional device 76, in addition to the memory card described above. In that case, the optional device control unit 74 determines the PCMCIA bus control LS.
You may comprise by I etc.

The communication I / F unit 80 is used for the digital camera 10
Supported communication specifications, such as USB, RS-23
Controls such as protocol conversion according to specifications of 2C, Ethernet (registered trademark), and the like. The communication I / F unit 80 may output the compressed data or the digital image data to an external device including a network via the terminal 92. Communication I / F
The unit 80 includes a driver IC as needed, 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 device such as a printer, a karaoke machine, a game machine, or the like through a unique interface.

The display unit 100 includes the LCD monitor 10
2, the LCD panel 104, the monitor driver 106, and the panel driver 108. Monitor driver 106
Controls the LCD monitor 102. The panel driver 108 also controls the LCD panel 104. LCD
The monitor 102 is provided on the back surface of the camera, for example, with a size of about 2 inches, and displays the current shooting and playback mode, shooting and playback zoom magnification, battery level, date and time, mode setting screen, subject image, and the like. indicate. The LCD panel 104 is, for example, a small monochrome LCD provided on the upper surface of the camera, and displays information such as image quality (FINE / NORMAL / BASIC, etc.), strobe light emission / emission prohibition, standard number of recordable images, number of pixels, battery capacity / remaining amount, etc. .

The operation section 110 includes a power switch 112,
It has a release switch 114, a function setting unit 116, and a zoom switch 118. The power switch 112 is
The power of the digital camera 10 is turned on / off based on a user's instruction. The release switch 114 has a two-step pushing structure of half-push and full-push. 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 the release switch 114 is fully pressed, the imaging unit 20 captures a subject image.

The function setting section 116 is, for example, a rotary type mode dial, a cross key, or the like, and has "file format", "special effect", "print", "decide / save",
Settings such as "display switching" are accepted. Zoom switch 1
18 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 unit of the digital camera 10. Main CPU
Reference numeral 62 reads the state of the function setting section 116 to determine whether the digital camera 10 is in the shooting mode or the reproduction mode.

When the digital camera 10 is in the photographing mode,
The main CPU 62 monitors the half-pressed state of the release switch 114. When the half-pushed state of the release switch 114 is detected, the imaging system CPU 50 obtains photometric data and distance measurement data from the photometric sensor 54 and the distance measuring sensor 52, respectively. The imaging control unit 40 adjusts the focus, diaphragm, etc. of the imaging unit 20 based on the photometric data and the distance measurement data obtained by the imaging system CPU 50. When the adjustment is completed, the LCD monitor displays a character such as "standby" to inform the user.

Subsequently, the main CPU 62 monitors the fully pressed state of the release switch 114. When the fully pressed state of the release switch 114 is detected, the shutter 26 is closed after a predetermined shutter time, and the charge accumulated in the CCD 30 is swept out to the image pickup signal processing section 32. The digital image data generated as a result of the processing by the imaging signal processing unit 32 is output to the bus 82. The digital image data is once stored in the main memory 68, and thereafter the YC processing unit 7
0 is processed by the compression / expansion processing unit 78 and is recorded in the optional device 76 via the optional 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 reproduction mode, the main CPU 62 reads out the taken image from the main memory 68, the non-volatile memory 66, and / or the option device 76, and reads it from the LCD monitor 102 of the display unit 100. Display to.

In this state, when the user instructs "forward feed" and "reverse feed" in the function setting section 116, the main CPU 6
2 is a main memory 68, a non-volatile memory 66, and / or
Alternatively, another captured image stored in the option device 76 is read out and is read out from the LCD monitor 102 of the display unit 100.
Display to.

Although the present invention has been described using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be added to the above-described embodiment. A mode in which such changes or improvements are added may be included in the technical scope of the present invention.
It is clear from the description of the claims.

[0074]

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

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a layout of a digital camera 10 as an example of an image pickup apparatus according to a first embodiment.

FIG. 2 is a block diagram showing a characteristic configuration of a digital camera 10 as an example of an image pickup apparatus according to a second embodiment.

FIG. 3 is a diagram showing a configuration of a digital camera 10 as an example of an imaging device.

FIG. 4 is a block diagram showing a characteristic configuration of a digital camera 10 as an example of an image pickup apparatus according to a fourth embodiment.

FIG. 5 is a diagram showing a configuration of a digital camera 10 as an example of an imaging device.

[Explanation of symbols]

20 Imaging unit 120 storage 122 Input section 124 pixel number converter 126 first drive circuit 128 D / A converter 130 Second drive circuit 132 DC / DC converter 134 Display 136 Gamma correction unit 138 Vertical sync signal generator 140 Timing setting section 144 First semiconductor device 146 Second semiconductor device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) H04N 5/243 H04N 5/243 5/66 5/66 BF term (reference) 2H093 NA16 NC05 NC24 NC34 NC38 ND49 NF14 NG16 5C006 AA16 AA22 AC21 AF46 AF47 AF83 BB11 BC16 BF46 FA41 5C022 AA00 AB19 AB40 AC01 AC11 AC69 CA00 5C058 AA06 BA02 BA13 BA35 BB05 5C080 AA10 BB05 DD22 EE21 EE29 EE30 FF09 GG07 JJ02

Claims (14)

[Claims] 1. A display unit having a plurality of display pixels, the display unit displaying an image based on an image signal composed of a plurality of pixel signals, and the image signal of a digital signal being an analog signal. Driving the display pixels arranged in the vertical or horizontal direction of the display unit on the basis of the D / A converter which outputs the signal to the drive circuit and the image signal output from the D / A converter. And a second semiconductor device forming a second drive circuit for driving the display pixels arranged in a direction different from the direction. And display unit. 2. The second semiconductor device is the second semiconductor device.
The display unit according to claim 1, further comprising a DC / DC converter that supplies a voltage to the drive circuit of the. 3. The second semiconductor device is the second semiconductor device.
The display unit according to claim 1, further comprising a circuit that provides an average voltage to the driving circuit of the. 4. The display unit according to claim 1, wherein the first semiconductor device further includes a gamma correction unit that gamma-corrects the image signal of a digital signal. 5. The first semiconductor device and the second semiconductor device.
The display unit according to claim 1, wherein the semiconductor device is provided on a transparent substrate. 6. An input unit for inputting a horizontal synchronizing signal and the image signal on the transparent substrate, and a wiring for outputting the horizontal synchronizing signal and the image signal input by the input unit to the first semiconductor device. The display unit according to claim 5, further comprising a pattern. 7. The first semiconductor device further comprises a timing setting section for setting a timing at which the input section inputs the image signal.
Display unit described in. 8. The first semiconductor device further comprises a vertical sync signal generator that generates the vertical sync signal based on the horizontal sync signal.
Display unit described in. 9. The sixth semiconductor device according to claim 6, further comprising a pixel number conversion unit that converts the number of the pixel signals included in the image signal input by the input unit. Display unit. 10. The display according to claim 9, wherein in the first semiconductor device, the pixel number conversion unit is provided at a position closer to the input unit than the first drive circuit. unit. 11. The display unit according to claim 9, wherein in the first semiconductor device, the pixel number conversion unit is provided at a position closer to the input unit than the D / A converter. . 12. A display unit having a plurality of display pixels, the display unit displaying an image based on an image signal composed of a plurality of pixel signals, and the image signal of a digital signal being an analog signal of the image signal. Driving the display pixels arranged in the vertical or horizontal direction of the display unit based on the D / A converter that outputs the converted image to the drive circuit and the image signal output by the D / A converter. And a second drive circuit for driving the display pixels arranged in a direction different from the direction.
And a semiconductor device forming a driving circuit of the display unit. 13. An imaging device comprising a display unit having a plurality of display pixels, the imaging unit capturing an image, a storage unit storing the image captured by the imaging unit, and an image storage unit stored in the image memory. And a display unit for displaying the image, wherein the display unit displays an image based on an image signal composed of a plurality of pixel signals, and the image signal of a digital signal is an image signal of an analog signal. Driving the display pixels arranged in the vertical or horizontal direction of the display unit based on the D / A converter that outputs the converted image to the drive circuit and the image signal output by the D / A converter. A first semiconductor device having a first driving circuit for driving the display device, and a second driving circuit for driving the display pixels arranged in a direction different from the direction. Imaging apparatus characterized by comprising a semiconductor device. 14. A semiconductor device for driving a display unit having a plurality of display pixels, the gamma correction unit performing gamma correction on an image signal composed of a plurality of pixel signals, and an image signal of a digital signal of an analog signal. A D / A converter that converts the image signal and outputs the image signal to the drive circuit, and the display pixels arranged in the vertical or horizontal direction of the display unit based on the image signal output by the D / A converter. And a driving circuit for driving the semiconductor device.