JPH0259A - Pattern projecting device - Google Patents

Abstract

PURPOSE:To accomplish the projection of any image based on a video signal on an object by reading the video signal from a video input part, driving a transmissive liquid crystal display device, and projecting transmitting light responding to an image on the object. CONSTITUTION:A signal control part 11 temporarily stores the image signal of an original image 13 picked up by means of an image pickup tube 12 in a memory, reads it in a display mode, and makes the transmissive liquid crystal display device 10 display it. A laser beam sent through a collimator lens 4 is made incident on the display device 10. The incident laser beam is outputted on the side of a projecting lens 6 through a position responding to an image pattern and projected on a sample 7. Then, the image pattern is formed on the surface of the sample. By such a constitution, the type of a display pattern can be set on other than an optical path. Besides, the enlargement and the reduction of the image pattern is also accomplished by enlarging and reducing memory data itself.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pattern projection device that projects an image pattern onto an object using a transmissive liquid crystal display device.

[Conventional technology]

FIG. 1 shows conventional examples of forming various patterns such as printed circuit boards, wiring patterns for high-density modules, and photomasks. In the figure, the laser beam generated from the laser oscillator 1 or is expanded by the concave lens 3, and the collimating lens 4
The parallel light is made into parallel light and irradiated onto the original image 5. The laser beam that has passed through the original image 5 is condensed and irradiated onto the surface of the sample 7 via a projection lens 6. At this time, the projection lens 6 is arranged so that the image of the original image 5 is projected onto the surface of the sample 7 in a reduced size.
A reduced image of the original image 5 is instantly printed onto the sample surface.

[Problem to be solved by the invention]

In the conventional example described above, it is necessary to create an enlarged original image of the image that is desired to be processed on the sample surface, and then set it in the optical path, and whenever the image changes, the original image must be replaced.

An object of the present invention is to provide a pattern projection device that can project any image onto an object based on a video signal input to a video input section.

[Means to solve the problem]

The gist of the present invention is to provide a light source, a transmissive liquid crystal display device to which light from the light source is irradiated, a video input section into which a video signal is input, and a video signal read out from the video input section to display the transmissive liquid crystal display device. A pattern projection device comprising: a control unit that drives the device; and a projection lens that projects transmitted light corresponding to an image obtained from a transmissive liquid crystal display device driven by the control unit onto an object. be. .

[Effect]

With the above configuration, an image corresponding to the video signal input to the video signal input section can be projected onto the object.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail based on the drawings. That is, FIG. 2 is a diagram showing an embodiment of the present invention. The newly installed device in the figure is a transmission type liquid crystal display device 10. These are a signal control section 11, an image pickup tube 12, an image pickup lens 14, and an original image 13. Transmissive liquid crystal display device 10.

It is controlled by the signal control section 11. The control at this time is to determine which image pattern is to be displayed on the transmissive liquid crystal display device and to set the display timing.

Parallel laser light transmitted through the collimator lens 4 enters the display device 10 controlled by the signal control unit 11 .

The laser light incident on this display device 10 is transmitted through a position corresponding to the image pattern to the display device! 10 is output to the projection lens 6 side. This output laser light is irradiated onto the sample 7 through the projection lens 6 to form an image pattern on the sample surface.

As is well known in the art, the transmissive liquid crystal display device IO has a polarizing plate (glass) with respect to the laser beam incident surface.
It has a structure in which the transparent electrode, the liquid crystal main body, the transparent electrode, and the glass are integrated. The two transparent electrodes are arranged so as to form a matrix with each other. The display position is set by the electrodes in this matrix configuration.

Selection control of the matrix electrodes is performed by the signal control section 11.

The display image pattern to the signal control unit 11 is the original image 13 captured by the image pickup tube 12 . The signal control unit 11 controls the image pickup tube 1
Temporarily store the video signal obtained from 2 in memory,
In the display mode, the data is read from the memory and displayed on the display device 10. A specific configuration diagram of the signal control 11 is shown in FIG. First, a video signal from the image pickup tube 12 is converted into a signal converter 11.
0 and converts it into data that can be stored in the memory 112, for example, a binary signal.

This converted video signal is sent to the memory 112 via the write/read circuit 111, and the memory 112 is sent to the memory 112 according to the address.
2. The memory 112 may have a capacity for one display pattern, or may have a capacity for a plurality of display patterns. When displaying, the write/read circuit 111 is set to the read mode and the memory 11 is
2 to read data necessary for the signal converter 113.

This signal converter 113 converts the binary signal read from the memory 112 into a signal necessary for driving the liquid crystal display device IO.
That is, it is converted into X and Y signals. a signal conversion unit 110 that sends the X and Y signals to the display device 10 and performs necessary display;
113, the read/write circuit 111 is controlled by the control circuit 114. The control by this control circuit 114 firstly specifies the mode and secondly specifies its timing. The control circuit 114 also controls the laser oscillator 1.

The motor television 15 is omitted.

Next, we will provide an explanation based on specific numerical examples. The power density of the laser beam is selected so as not to damage the liquid crystal.

For example, the beam diameter was set to about 30011n so as to be 10'W/a1 or less, and the laser output was 7MW. The laser beam that passed through the transmission type liquid crystal display device 5 entered a projection lens 10 for projecting a reduced size of about 1/100, and a planar image displayed on the liquid crystal was printed on the surface of the sample 7 with a size of 1/100. The maximum power density on the sample surface at this time is approximately 10”W/
Reached cd. Sample 7 used a glass substrate with about 100 metal films deposited on it, and when irradiated with laser light, the metal film was removed and a liquid crystal pattern with a size of 17100 mm could be instantly transferred as is.

In the above embodiments, the type of display pattern can be set outside the optical path, making it possible to form extremely versatile patterns. Furthermore, since it is possible to enlarge or reduce the pattern, the data itself in the memory can be enlarged or reduced, increasing versatility.

Next, another embodiment will be described. In the above embodiment, the input information to the signal control section 11 is given from the image pickup tube 17, but there are other methods as shown in FIGS. 4 and 5.

In FIG. 4, a video signal recording section 16 is provided, and information from the video signal recording section 16 is provided as original image information. In FIG. 5, a video signal is transmitted by a wireless method, and the video signal is transmitted wirelessly from a video signal transmitter 18 to a video signal receiver 17, and is further inputted to the signal control section 11 as original image information. ing. However, in these two embodiments, the memory 112 is not necessarily required. According to the former embodiment, by storing pattern information in the video recording section, a necessary pattern can be formed when necessary. have advantages.

According to the latter embodiment, it is suitable for remote control when the part where the pattern is formed and the part where the pattern is supplied are separated.

〔Effect of the invention〕

As described above, according to the present invention, an image corresponding to an arbitrary image obtained by a video signal can be projected onto an object.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a conventional example, FIG. 2 is a diagram showing an embodiment of the present invention, and FIGS. 3, 4, and 5 are diagrams showing other embodiments of the present invention. DESCRIPTION OF SYMBOLS 1... Laser oscillator, 7... Sample, 10... Transmissive liquid crystal display device, 11... Signal control part, 12... Image pickup tube. Figure 1 Figure 3 Figure 2 Figure collection Cow Figure 5

Claims (1)

[Scope of Claims] 1. A light source, a transmissive liquid crystal display device to which light from the light source is irradiated, a video input section into which a video signal is input, and a video signal read out from the video input section to display the transmissive display device. A pattern projection device comprising: a control section that drives a liquid crystal display device; and a projection lens that projects transmitted light corresponding to an image obtained from the transmissive liquid crystal display device driven by the control section onto an object. Device. 2. The pattern projection apparatus according to claim 1, wherein the input section includes a storage section for storing a video signal. 3. The pattern projection apparatus according to claim 1, wherein the input section includes a receiving section that receives a video signal and stores it in the storage section.