JP2510116Y2 - Image printer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an image printer for printing out image data such as a television image.

[Prior Art] As an image printer that prints out image data such as a television image, a structure as shown in FIG. 7 has been conventionally used. The figure shows its schematic configuration. In the figure, 11 is a CRT display that displays an image based on image data, 12 is a light-shielding cylinder, 13 is a lens that collects the image displayed on the CRT display 11, and 14 is a lens. A diaphragm mechanism for adjusting the exposure light amount at 13, a shutter at 16, an instant film at 17, and an imaging unit at 17. The image displayed on the CRT display 11 is formed on the instant film 16 by the lens 13 via the diaphragm mechanism 14 and the shutter 15. Normally, the operation of the shutter 15 is not synchronized with the scanning timing of the CRT display 11, and the CRT scanning time for one screen, for example N
In the TSC method, the image was taken by exposing it for 1/8 to 1/15 second, which is longer than 1/30 second.

[Problems to be solved by the invention] As described above, the shutter 15 is a CR for one screen.
Since the open state is longer than the T scan time, different images may be captured in an overlapping manner when the screen displayed on the CRT display 11 is switched to another screen.

Further, one display pixel of the CRT display 11 is composed of phosphors of three colors, and when the image is printed out by the image pickup unit 17, the image is completely fixed, so that the color mixing of each pixel becomes worse. In order to deal with this, advanced technology is required for forming a shadow mask of the CRT display 11 and applying a phosphor. FIG. 8 to FIG. 10 show an example of the arrangement configuration that can be considered as the shadow mask of the CRT display 11. Fig. 8 shows a round hole mask with a delta arrangement in which round holes of three colors RGB are arranged in a delta pattern, and Fig. 9 shows RGB.
Fig. 10 shows a round hole mask with an in-line arrangement in which three-color round holes are arranged in parallel, and Fig. 10 shows a slit mask with an in-line arrangement in which three-color RGB slits are arranged in parallel. Although it is effective as a mask structure that is improved, the structure becomes complicated and the cost also increases.

The present invention has been made in view of the above situation, and an object thereof is to provide an image printer capable of surely outputting image data for one screen with good color mixing.

[Means and Actions for Solving the Problem] In the image printer according to the present invention, (1) a liquid crystal display panel for displaying an image at a predetermined timing, a backlight unit for illuminating the liquid crystal display panel, and the backlight. A film on which the image is printed by being exposed by the illumination of a light unit, an exposure instructing unit for instructing the film to expose the image displayed on the liquid crystal display panel on the film, and the exposure instruction. When instructed by the means, the control means controls to turn on the backlight part in synchronization with the effective screen display period of one screen of the image displayed on the liquid crystal display panel, and particularly (2) The backlight unit lights R, G, and B lights in a time division manner, and the control unit follows an instruction to the exposure instructing unit. Then, in the liquid crystal display panel, R in the image data,
The images corresponding to the G and B data are displayed in a time-sharing manner over n (n ≧ 3) times to form one screen, while the display timing of the images corresponding to the R, G, and B data is adjusted. The light of R, G and B of the backlight unit is turned on.

Therefore, since the exposure is performed corresponding to the display period of the image for one screen, the desired image can be surely printed out, and the R, G, and B data can be separately output at each pixel. Since the color mixture is improved due to the exposure, a clear image printout can be obtained.

[First Embodiment] A first embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows its schematic structure. Reference numeral 21 is a transmissive liquid crystal display panel for displaying image data, 22 is a backlight mounted on the back surface of the liquid crystal display panel 21, and illuminating the liquid crystal display panel 21 from the back surface. The parts 23 are attached to the opposite surface of the liquid crystal display panel 21 with the backlight part 22 interposed therebetween, and are a controller part for performing display control of the liquid crystal display panel 21 and lighting control of the backlight part 22. The backlight unit 22 and the controller unit 23 form a liquid crystal display unit 24. Liquid crystal display panel of this liquid crystal display unit 24
21 A light-shielding cylinder 25 for blocking external light is provided on the front surface,
The image pickup section is provided on the opposite side of the liquid crystal display section 24 with the light shielding tube 25 interposed therebetween.
26 is installed. In the image pickup unit 26, a lens 27 that collects an image obtained through the liquid crystal display panel 21 by turning on the backlight unit 22 is arranged in the center of the surface facing the liquid crystal display unit 24, and an image is formed by this lens 27. The instant film 28 is mounted at the position indicated by. Then, a switch for instructing the print output of the image on the outer upper surface of the housing of the imaging unit 26.
29 are provided.

Next, the configuration of an electronic circuit which is provided in the controller section 23 and controls the driving of the liquid crystal display panel 21 and the backlight section 22 will be described with reference to FIG. In the figure, a video signal from a processing circuit (not shown) is first input to the color signal processing circuit 31 and the sync separation circuit 32. The color signal processing circuit 31,
The luminance signal Y and the color difference signal RY among the input video signals
Then, the color difference signal BY is taken out, color signal processing is performed to obtain analog R, G, B data, and these are sent to the A / D converter 33. The A / D converter 33 converts the input R, G, B data into, for example, a 4-bit digital gradation signal and outputs it to the driver controller 34. On the other hand, the sync separation circuit 32 extracts a timing signal from the input video signal and outputs it to the driver controller 34. Driver controller
Reference numeral 34 is for controlling the segment driver 35 that drives the segment electrodes of the liquid crystal display panel 21 and the common driver 36 that drives the common electrodes thereof.
Create drive signals for segment electrodes and common electrodes from the R, G, B gradation signals and the timing signal from the sync separation circuit 32,
It is sent to the segment driver 35 and the common driver 36 to drive the liquid crystal display panel 21 for display. The driver controller 34 also sends a signal indicating the effective screen display period to the light controller 37. The light controller 37 controls on / off of the light power supply 38 for lighting the backlight unit 22 in response to a signal indicating the effective screen display period from the driver controller 34 and an operation signal from the switch 29.

Next, the detailed circuit configuration of the write controller 37 will be described with reference to FIG.

A signal VH indicating the start of the effective screen display from the driver controller 34 is input to the clock terminal CK of the chattering reading circuit 41 and the flip-flop (hereinafter abbreviated as “F / F”) 42, and indicates the end of the effective screen display. Signal VE is F / F4
F / F composed of 2 set terminals S and 2 NOR circuits
Input to the set terminal of 43. Chattering reading circuit 41
Determines from the operation signal from the switch 29 whether chattering has occurred and sends the signal a to the set terminal of the F / F 43. Signal b from the Q terminal of F / F43 is D of F / F42
Input signal to the terminal and output signal c from the Q terminal of this F / F42
Is sent to the light power supply 38 as an on / off control signal.

 Next, the operation of the first embodiment will be described.

FIG. 4 (1) is a signal VH indicating the beginning of the effective screen display, and FIG. 4 (2) is a signal indicating the end of the effective screen display.
It is VE. Therefore, the effective screen display period is as shown in the figure. Switch 29 is operated during this display period,
When the switch signal is input to the chattering reading circuit 41 in the light controller 37 as shown in FIG.
The chattering reading circuit 41 reads from this signal whether chattering has occurred, and then sends a signal a as shown in FIG. 4 (4) to the set terminal of the F / F 43. This signal a becomes "H" until the next signal VH comes in. In the F / F43, this signal a is input to the set terminal, so that the Q terminal from the Q terminal in FIG. The signal b as shown in is output. This signal b becomes "L" from the time when the signal a becomes "H" until the signal VE is input. F /
In F42, when the signal VH is next input, the signal b is input from the D terminal using this as a clock, and the signal c from the Q terminal is set to "L" until the signal VE is input and is newly set. " Therefore, this signal c becomes a signal which becomes "L" during the effective screen display period at the next timing subsequent to the effective screen display period when the switch 29 is operated. The write power supply 38 responds to this signal c and causes the backlight unit 22 to emit light only while the signal c is "L". As a result, the image based on the image data for one screen displayed on the liquid crystal display panel 21 is focused by the lens 27 as it is, and is imaged and exposed on the instant film 28, so that the desired image is surely obtained. It is possible to print out only the other image without overlapping with other images.

Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings.

Here, the schematic structure is similar to that shown in FIG. 1, and the same parts are designated by the same reference numerals and the description thereof is omitted, and FIG. 5 shows only the configuration of the electronic circuit.

A video signal from a processing circuit (not shown) is first input to the video signal processing circuit 51. This video signal processing circuit 51
Is a luminance signal Y and a color difference signal R- from the input video signal.
Y and the color difference signal BY are taken out and sent to the color signal processing circuit 52. The color signal processing circuit 52 performs color processing on the luminance signal Y, the color difference signal RY, and the color difference signal BY to obtain analog R, G, B data, and these are A / D converter 53. Send to. The A / D converter 53 converts the input R, G, B data into, for example, 4-bit digital gradation data R ', G', B ', and outputs it to the control circuit 54. The video signal processing circuit 51 outputs a timing signal indicating a basic period to the color signal processing circuit 52 by synchronous separation, and this timing signal is also sent to the A / D converter 53. The control circuit 54 temporarily stores the R ', G', and B'data in the memory 55, respectively, while creating a control clock according to the timing signal input from the A / D converter 53. A key input signal by operating the switch 29 is input to the control circuit 54,
In response to this, the control circuit 54 controls the segment driver 56 that drives the segment electrodes of the liquid crystal display panel 21 and the common driver 57 that drives the common electrodes thereof, and the segment drivers 56 read R ', G from the memory 55. The 'and B'data are sequentially output to cause the liquid crystal display panel 21 to perform the display operation. At the same time, the control circuit 54 sends a control signal to the backlight drive circuit 58 to sequentially drive the R light source 22a, the G light source 22b, and the B light source 22c that constitute the backlight unit 22 to be turned on.

In the above-mentioned configuration, the control circuit 54 triples the effective screen display period three times to drive the display of the liquid crystal display panel 21 by the segment driver 56 and the common driver 57 and the R light source by the backlight drive circuit 58. 22a, G light source 2
The lighting drive of the 2b and B light sources 22c is performed. That is, at the beginning of the effective screen display period, the control circuit 54 sends the R'data read from the memory 55 to the segment driver 56 for display on the liquid crystal display panel 21, while synchronizing with this, the backlight drive circuit. The R light source 22a is driven to light via 58. As a result, in the instant film 28 of the image pickup unit 26 on the opposite side of the backlight unit 22 with the liquid crystal display panel 21 sandwiched between them, only the R photosensitive unit is exposed.

At the second time of the subsequent effective screen display period, the control circuit 54
Sends the G'data read from the memory 55 to the segment driver 56 for display on the liquid crystal display panel 21, while
In synchronization with this, the G light source 22 is transmitted through the backlight drive circuit 58.
Drive b to light. This makes instant film 2
In the case of 8, only the G photosensitive portion is exposed.

Similarly, at the third time of the effective screen display period, the control circuit 54 reads the B ′ data from the memory 55 and outputs the segment driver 56.
To the liquid crystal display panel 21, and in synchronization with this, the B light source 22c is driven to light via the backlight drive circuit 58. As a result, in the instant film 28, only the B photosensitive portion is exposed.

Since the R, G, and B data are exposed on the instant film 28 at different timings in this way, good color mixing is possible even if the liquid crystal display panel does not have a color filter with a complicated mask pattern or transparent electrodes in an array corresponding thereto. You will be able to get a printout.

In the first and second embodiments described above, the image displayed on the liquid crystal display panel 21 as shown in FIG.
An example of the structure in which the light is focused by 27, imaged on the instant film 28, and exposed is shown, but the structure is not limited to this.
As shown in FIG. 6, the liquid crystal display panel and the instant film may be in close contact with each other.

That is, in the figure, 61 is a transmissive liquid crystal display panel for displaying an image based on image data, 62 is a backlight unit attached to the back surface of the liquid crystal display panel 61, and 63 is a liquid crystal display panel with the backlight unit 62 sandwiched therebetween. It is mounted on the surface opposite to 61 and controls the display of the liquid crystal display panel 61 and the backlight unit 62.
Controllers 64 and 65 for controlling the lighting of the liquid crystal display panel 61 are liquid crystal drive circuits for driving the segment electrodes and common electrodes of the liquid crystal display panel 61. Then, the instant film 66 is arranged in close contact with the front surface of the liquid crystal display panel 61. The exposed surface of the instant film 66 is mounted so as to be in complete contact with the liquid crystal display panel 61, and external light other than light emitted by lighting the backlight unit 62 is blocked so that it does not reach the exposed surface. There is.

With such a structure, an image based on the image data displayed on the liquid crystal display panel 61 is displayed on the instant film 66.
A lens or the like for forming an image on the top is not necessary, and the structure can be greatly simplified and downsized.

[Advantages of the Invention] As described in detail above, according to the present invention, in the image printer, (1) a liquid crystal display panel for displaying an image at a predetermined timing, a backlight unit for illuminating the liquid crystal display panel, and A film on which the image is printed by being exposed by illumination of a backlight unit, an exposure instructing unit for instructing the film to expose the image displayed on the liquid crystal display panel to the film, and the exposure. When instructed by the instructing means, the control means controls to turn on the backlight unit in synchronization with an effective screen display period of one screen of an image displayed on the liquid crystal display panel, and particularly (2) If the backlight unit lights R, G, and B lights in a time-division manner, the control unit follows the instructions of the exposure instruction unit and R in the image data is displayed on the liquid crystal display panel,
The images corresponding to the G and B data are displayed in a time-sharing manner over n (n ≧ 3) times to form one screen, while the display timing of the images corresponding to the R, G, and B data is adjusted. Since the lights of R, G, and B of the backlight unit are turned on by simply instructing print output,
It is possible to provide an image printer that can reliably print out one screen of an image displayed on a liquid crystal display panel without overlapping with other images. In the case of a color image, since the display portion based on each R, G, B data of the image data forming one screen of color image is exposed on the film at different timings, a good color mixture and clear image can be obtained. An image printer that can print out a color image can be provided.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention, FIG. 1 is a diagram showing a schematic structure of the first embodiment, and FIG. 2 is a configuration of an electronic circuit provided in the controller section of FIG. FIG. 3, FIG. 3 is a block diagram showing the detailed circuit configuration of the write controller of FIG. 2, FIG. 4 is a timing chart showing the signal processing timing in FIG. 3, and FIG.
FIG. 6 is a block diagram showing an electronic circuit configuration of the second embodiment, sixth.
FIG. 7 is a diagram illustrating a schematic structure according to another embodiment, FIG. 7 is a diagram illustrating a schematic structure of a conventional image printer, and FIGS.
FIG. 10 is a diagram showing a color mask pattern for improving color mixing. 11 …… CRT display, 12,25 …… Shading tube, 13,27…
… Lens, 14 …… Aperture mechanism, 15 …… Shutter, 16,28,66
…… Instant film, 17,26 …… Imaging unit, 21,61…
… Liquid crystal display panel, 22,62 …… Backlight part, 22a ……
R light source, 22b …… G light source, 22c …… B light source, 23,63 …… Controller section, 24 …… Liquid crystal display section, 29 …… Switch, 3
1,52 ... Color signal processing circuit, 32 ... Synchronous separation circuit, 33,53
…… A / D converter, 34 …… Driver controller, 35,56…
… Segment driver, 36,57 …… Common driver, 37
...... Light controller, 38 ...... Light power supply, 41 ...... Chattering reading circuit, 42,43 ...... F / F, 51 ...... Video signal processing circuit, 52 ...... Color signal processing circuit, 54 ...... Control circuit, 55
...... Memory, 58 …… Backlight drive circuit, 64,65 ……
LCD drive circuit.

Claims (2)

(57) [Scope of utility model registration request] 1. A liquid crystal display panel for displaying an image at a predetermined timing, a backlight unit for illuminating the liquid crystal display panel, and a film on which the image is printed by being exposed by the illumination of the backlight unit. An exposure instructing means for instructing to expose an image displayed on the liquid crystal display panel on a film by turning on the backlight part; and when the exposure instructing means instructs, it is displayed on the liquid crystal display panel. An image printer comprising: a control unit that lights the backlight unit in synchronization with an effective screen display period of one screen of an image. 2. The backlight unit lights R, G, and B lights in a time-division manner, and the control unit displays the liquid crystal display panel according to an instruction from the exposure instruction unit. An image corresponding to each of R, G, and B data of the image data based on the color image is displayed in one screen by time-divisionally displaying n (n ≧ 3) times, while each of R, G, and B is displayed. R of the backlight unit according to the display timing of the image corresponding to the data,
The image printer according to claim 1, wherein the G and B lights are turned on.