KR100197606B1 - The still camera with the enlarging function - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a still camera display device, and more particularly, to a still camera having an enlargement function capable of enlarging and displaying a part of photographed image information. Generally, when displaying character or image information photographed by an LCD, the resolution of the CD is lower than the resolution of the stored character or image information. Also, since the screen of the LCD is small, it is inconvenient to view any part of the photographed information. Therefore, according to the present invention, the display mode can be changed by selecting the normal mode and the enlargement mode according to the switching selection signal of the user, and the read time of the image information stored in the VRAM can be delayed to enlarge and display a part of the image stored in the VRAM In the enlargement mode, the user arbitrarily inputs the vertical position and the horizontal position to move the position of the enlarged image, thereby providing an advantage that enlargement information of a desired portion can be obtained.

Description

Still camera with zoom function

FIG. 1 is a block diagram of a still camera having an enlargement function according to a preferred embodiment of the present invention; FIG.

FIG. 2 is a conceptual view for explaining an enlarged display state of a still camera showing an enlarging function of the present invention; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

20: Horizontal address value counter (HAC) 25, 45, 56:

30: adder 40, 50: clock dividing means

60: VRAM 70: Clock generator

80:

BACKGROUND OF THE INVENTION Field of the Invention [0002] The present invention relates to a still camera display device, and more particularly, to a still camera having an enlargement function capable of enlarging and displaying a part of photographed image information.

A still camera is an electronic concept added to a general camera. It can store video signals in its own memory without using a film used in a general camera, and can display and output data in connection with a PC It is different from camera. To briefly describe the operation of the still camera, the image information or character information photographed by the CCD unit is subjected to digital signal processing and displayed, and the processed image information and character information are stored in a memory through a predetermined compression process. The image information and the character information stored in the memory are displayed on the display device according to the user's selection signal. In general, a liquid crystal display (LCD) is used as a display means of a still camera. When a still camera to which such an LCD device is attached displays character information or image information stored in a memory, the resolution of the LCD is lower than the resolution of stored character information or image information. Also, since the screen of the LCD is small, it is inconvenient to view any part of the photographed information.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a display device capable of enlarging a display image by delaying the output speed of a memory by varying the speed of a clock for reading data stored in the memory in order to solve the above problems, And an enlarging function capable of obtaining enlarged information of a desired portion by moving the enlarged position according to the horizontal position selection value.

According to an aspect of the present invention, there is provided a display device for a still camera, comprising: a memory for storing a video signal; a horizontal clock for reading a video signal stored in the memory; A second clock dividing means for variably controlling the output speed of the read clock signal by dividing a vertical clock for reading pixels constituting one line of the video signal stored in the memory, And a display unit for displaying a video signal read out according to a read clock signal applied from the first clock dividing means and the second clock dividing means to the video signal.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a configuration diagram of a still camera having an enlargement function according to a preferred embodiment of the present invention. As shown in FIG. 1, the apparatus of the present invention includes a horizontal address counter (HAC) for receiving a horizontal synchronizing signal (HSYNC) and a vertical synchronizing signal (VSYNC) from a synchronizing signal generator (20). The adder 30 is configured to receive the horizontal address value from the horizontal address value counter 20 and to receive and add the vertical position switching value of the user. At this time, the first switching unit 25 can receive the user vertical position selection switch value according to the user mode selection signal. The present invention also includes a first clock dividing means 40 and a second clock dividing means 50 for dividing the clock and adjusting the display speed of the VRAM 60. [ The first clock dividing means 40 includes a second switching unit 46 for selectively outputting a vertical position value input from the adder 30 in accordance with a user mode selection signal, A first clock divider 42 for directly outputting the position value, and a second clock divider 44 for dividing the input clock signal by 1/2 and controlling the output speed of the clock. On the other hand, the second clock dividing means 50 is connected to a clock generator 70 which generates a clock for reading one pixel. The second clock dividing means 50 includes a third switching unit 56 for selectively outputting a clock signal from the clock generator 70 according to a user mode selection signal, And a fourth clock divider 54 for dividing the clock divider 52 and the input clock signal to adjust the output speed of the clock. The first clock dividing means 40 and the second clock dividing means 50 generate a read clock signal to the VRAM 60. The VRAM 60 is largely composed of an image storage unit and a SAM (Serial Access Memory) PORT. The SAM PORT reads the image stored in the image storage unit one line at a predetermined clock (e.g., 14.3 MHz) and outputs it to the display unit 80.

First, referring to FIG. 1, a brief description will be given of a case of a normal mode. The horizontal address value counter 20 receives HYNC and VSYNC from a synchronization signal generator (not shown). The horizontal address value counter 20 increments the count value by one every time HSYNC is input, and when the VSYSC is input, the horizontal address value counter 20 is reset. The first switching unit 25 receives the user mode selection signal. This user mode selection signal is a signal indicating whether the user selects the enlargement mode or the general mode. Since the current mode is currently the current mode, the first switching unit 25 is switched to output 0 to the adder 30. Accordingly, the adder 30 adds the horizontal address value counted from the horizontal address value counter 20 and the zero value input from the first switching unit 25, and outputs the sum to the first divider 42. The second switching unit 46 is switched to the first divider 42 according to the user mode selection signal (normal mode). The first divider 42 outputs the input clock to the VRAM 60 as it is. The video signals recorded in the video storage unit of the VRAM 60 are output one line at a time to the SAM PORT according to the clock applied from the first divider 42. Meanwhile, the third switching unit 56 is switched to the third frequency divider 52 according to the user mode selection signal (normal mode). The third frequency divider 52 receives a predetermined clock for reading a pixel from the clock generator 70 and outputs the same to the SAM port of the VRAM 60 as it is. At this time, the value of the user horizontal positioning switch is initialized to zero. The display unit 80 displays a video signal applied from the SAM PORT of the VRAM 60.

Now, the operation of the still camera applied in the enlarged mode of the present invention will be described in detail.

The adder 30 receives the vertical position value from the horizontal address value counter 20, adds the two values, and outputs the final vertical position value. The second switching unit 46 selects the second frequency divider 44 according to the user mode selection signal (enlargement mode). The second divider 44 divides the output value from the adder 30 by 1/2 and outputs it to the VRAM 60. [ That is, the second divider 44 reduces the clock input from the adder 30 in half and outputs the reduced clock to the VRAM 60 in which the image is stored. Therefore, the VRAM 60 delays the output time according to the vertical clock value as slow as 1/2, and outputs the image data to the SAM PORT. On the other hand, the third switching unit 56 selects the fourth frequency divider 54 according to the user mode selection signal (enlargement mode). The fourth divider 54 divides the clock input from the clock generator 70 by a half and outputs it to the SAM port of the VRAM 60. That is, the fourth divider 54 reduces the read clock for reading one pixel from the clock generator 70 in half, and reads one line of the image signal stored in the SAM PORT. Accordingly, the display unit 80 displays a video signal applied from the SAM PORT of the VRAM 60 according to the clock applied from the fourth divider 54. [ At this time, the user horizontal position switch value can be inputted from the outside so that the user can set the pixel position for one line.

FIG. 2 is a conceptual diagram for explaining an enlarged display state of a still camera showing an enlarging function of the present invention. The video signal stored in the VRAM 60 is as shown in FIG. 2 (a). In the normal mode, the video signal stored in the VRAM 60 is directly displayed on the display unit 80 (see FIG. 2 (b)). In the enlarged mode, the video signal stored in the VRAM 60 Only a part of the stored video signal is represented. In the enlargement mode, the user can input the vertical position value and the user horizontal position value and adjust the position to enlarge arbitrarily.

Accordingly, the present invention relates to a character enlargement display apparatus for a still camera capable of enlarging and displaying a part of photographed image information. The present invention improves the conventional still camera device in which the resolution of the LCD is lower than the resolution of the stored character or image information and the LCD screen is small so that it is inconvenient to view any part of the photographed information . According to the present invention, the speed of a clock for reading data stored in a memory is varied to slow down the output speed of the memory, thereby enabling enlargement of an image at the time of display. Further, according to a vertical position and a horizontal position selection value input by a user, Thereby providing enlarged information of a desired portion.

Claims (5)

A display device of a still camera, comprising: a memory for storing a video signal; A first clock dividing means for variably controlling an output speed of a read clock signal by dividing a horizontal clock for reading an image signal stored in the memory; A second clock dividing means for variably controlling an output speed of the read clock signal by dividing a vertical clock for reading pixels constituting one line of the video signal stored in the memory; And a display unit for displaying a video signal read out according to a read clock signal which is variably applied from the first clock dividing means and the second clock dividing means to a video signal stored in the memory. The still camera according to claim 1, wherein the memory comprises an image storage unit for storing image signals and a SAM PORT for temporarily storing image information read from the image storage unit. The apparatus of claim 1, wherein the first clock dividing means comprises: a horizontal address value counter for receiving a horizontal synchronizing signal (HSYNC) and a vertical synchronizing signal (VSYNC) and counting a horizontal synchronizing signal by using a vertical synchronizing signal as a reset signal; A first switching unit for outputting a user vertical position selection value applied from the outside according to a user mode selection signal to the adder; An adder for adding a horizontal address value input from the horizontal address value counter and a vertical position selection value applied from the first switching unit to generate a clock for finding a vertical position start point of a video signal stored in the memory; A first clock frequency divider for transmitting a clock for a vertical position starting point applied from the adder as it is; A second clock frequency divider for dividing a clock for a vertical position start point from the adder to a predetermined magnitude to adjust a horizontal address read clock at a predetermined speed to a predetermined speed and output the clock to the memory; And a second switching unit for variably selecting the first divider and the second divider according to a user mode selection signal. The system of claim 1 or 2, wherein the second clock dividing means comprises: a clock generating unit for generating a clock for reading a pixel value of one row of image information stored in the SAM PORT; A third frequency divider for transmitting a clock applied from the clock generator as it is; A fourth divider for dividing a clock applied from the clock generator to a predetermined magnitude to adjust an output speed of a vertical address value read clock; And a third switching unit for variably selecting the third and fourth frequency divisions according to a user mode selection signal applied from the outside. The still camera according to claim 1, wherein the memory is capable of adjusting an output position of a pixel stored in the memory SAM PORT by receiving a user horizontal position value from the outside.