JP2564938Y2 - Liquid crystal display for projection - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection liquid crystal display device for displaying an image signal such as a computer output on a liquid crystal panel and enlarging the image.

[0002]

2. Description of the Related Art Conventional liquid crystal display devices for projection are roughly classified into the following groups. That is,
[1] a liquid crystal projection device that is integrated by incorporating a liquid crystal panel together with a light source and a lens system for enlargement;
[2] A liquid crystal display device can be attached to and detached from a projector having a light source and a lens system for enlargement. Furthermore, the method of [2] uses OHP as a [2-A] projector.
(Overhead projector), a method of placing a projection liquid crystal display device in place of a document, and [2-B] Using a slide projector as a projector and mounting a projection liquid crystal display device instead of a slide film. Method. The present invention relates to a [2-B] type liquid crystal display device for projection. The entire disclosure is described in Japanese Utility Model Application No. 63-98645 of the present applicant.

[0003]

[Problems to be Solved by the Invention] When focusing on the direction in which the mounted slide film is mounted, the slide projector is of a type that drops the film in the direction of gravity,
It is divided into the type that sets the film by moving in the direction perpendicular to the gravity. Already proposed [2-
The projection type liquid crystal display device of the type B) can be mounted only on the former type of slide projector. However, there has been a demand for a projection liquid crystal display device which can be mounted on either type of slide projector. The purpose of the present invention is to provide a projection that can be attached to and displayed on both a slide projector that drops a film in the direction of gravity and a slide projector that sets a film by moving the film in a direction perpendicular to gravity. Liquid crystal display device is provided.

[0004]

In order to achieve the above object, the configuration of the present invention is such that a circuit chip directly connected to an electrode on a glass substrate of a liquid crystal panel includes a scanning circuit, a signal circuit, and a scanning circuit. Means for selecting one of the signal circuits.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an external view showing an embodiment of the projection liquid crystal display device of the present invention. The housing 200 includes a liquid crystal panel storage section 220 and a control circuit storage section 210, and stores a liquid crystal panel and a control circuit, respectively. A windshield 250 made of a transparent acrylic plate is arranged at the center of the liquid crystal panel storage section 220. Holders 221 and 222
Is provided for mounting on a slide projector. The switch 203 is used to select between the case where the switch is attached to a slide projector of a type in which the film is dropped in the direction of gravity and the case where the switch 203 is attached to a slide projector of a type in which the film is moved and set in a direction perpendicular to the gravity. belongs to. The external connector 201 is for taking in an image signal from the outside. The control circuit housing section 210 has a luminance volume 202 for changing the brightness of the liquid crystal display.

FIG. 2 is a diagram showing a method of using the projection liquid crystal display device of the present invention. This figure shows a case where a slide projector of a type that drops a film in the direction of gravity is used as a projector. Slide projector 5 into housing 200
00, and the external connector 201 is connected to the connector 511 of the computer 510 via the cable 520. An image signal of the computer 510 is processed by a control circuit to display an image on a liquid crystal panel, and the image is displayed on the projector 50.
Screen 50 using a lens 502 and a light source 501.
3. Projection is enlarged.

FIG. 3 is an external view showing a display state of a liquid crystal panel when the projection liquid crystal display device of the embodiment of the present invention is mounted on a slide projector of a type in which a film is dropped in the direction of gravity. . The device of the present invention is mounted in the direction of arrow 800. The liquid crystal panel 300 is configured by sealing liquid crystal between a glass substrate 310 on which electrodes are patterned and a glass substrate 320 on which electrodes are patterned.
Each of the circuit chips 311, 312, 321 and 322 is composed of a scanning circuit, a signal circuit, and a means for selecting one of the scanning circuit and the signal circuit, and adopts a COG (chip-on-glass) method. Has been implemented. That is, the circuit chips 311 and 312 each select the function of the scanning circuit and set the transparent electrode on the glass substrate 310, and the circuit chips 321 and 322 select the function of the signal circuit and set the transparent electrode on the glass substrate 320, respectively. Connected by paste. Each circuit chip 3
Connections from 11, 312, 321 and 322 to the control circuit are made via a flexible printed circuit board 380. A displayable region 370 surrounded by a two-dot chain line is a region where an image can be formed as an overlapping portion between an electrode on the glass substrate 310 and an electrode on the glass substrate 320. Since the vertical to horizontal ratio of the display unit is usually 3 to 4, non-display units 375 and 376 which do not display an image are provided in addition to the display unit 371 where the image 360 is actually displayed.

FIG. 4 shows a display state of the liquid crystal panel when the projection liquid crystal display device according to the embodiment of the present invention is mounted on a slide projector of a type in which a film is moved in a direction perpendicular to gravity to be set. FIG. The device of the present invention is mounted in the direction of arrow 800. 4, the same numbers as those in FIG. 3 indicate the same items.
The circuit chips 311 and 312 respectively select the function of the signal circuit and paste the transparent electrodes on the glass substrate 310, and the circuit chips 321 and 322 respectively select the function of the scanning circuit and paste the transparent electrodes on the glass substrate 320 respectively. It is connected. Since the vertical to horizontal ratio of the display unit is usually 3 to 4, the display unit 3 on which the image 360 is actually displayed is displayed.
Non-display portions 377 and 3 that do not display an image other than 72
78 are provided. The display image of FIG. 4 is rotated by 90 degrees with respect to the display image of FIG.

FIG. 5 is a block diagram of a circuit chip connected to a liquid crystal panel constituting the projection liquid crystal display device of the present invention. Since the four circuit chips have the same circuit configuration,
One of the circuit chips 311 will be described.
The circuit chip 311 includes a signal circuit 610 and a scanning circuit 62.
0, and selecting means TG1 and TG2 for selecting any one of the output of the signal circuit 610 and the output of the scanning circuit 620. All operations in the circuit chip 311 are performed by digital signals. Data S2, clock S3 for sampling data, and power supply V1 are supplied from control circuit 400 to signal circuit 610. The control circuit 400 supplies the scanning circuit 620 with a timing pulse S4, a clock S5, and a power supply V2 serving as a reference for starting scanning. The selection means TG1 and TG2 are each formed of, for example, a transmission gate. The selection signal S1 is supplied from the control circuit 400 to the selection means TG1, and controls whether to transmit the output of the signal circuit 610 to the electrode 390 on the glass substrate.
An inverted signal S6 of the selection signal S1 is supplied to the selection means TG2, and the output of the scanning circuit 620 is output to the electrode 39 on the glass substrate.
Controls whether to transmit to 0. As described above, the circuit chip 311 controls the signal circuit 6 by setting the selection signal S1.
10 and one of the scanning circuits 620. As a result, the display image can be rotated by 90 degrees, and the display state of FIG. 3 and the display state of FIG. 4 can be switched.

[0010]

[Effects of the Invention] As is apparent from the above description, according to the present invention, not only the slide projector of the type that drops the film in the direction of gravity, but also the type that sets the film by moving the film in the direction perpendicular to the gravity. It can be mounted on a slide projector, which increases the number of models that can be mounted and is extremely convenient. For example, when assuming a case where a presentation is carried out by carrying the projection liquid crystal display device of the present invention and a floppy disk during a business trip, there are many merits that there are many types of slide projectors that can be applied. Thus, the added value of the device as one of the peripheral devices of the computer can be dramatically increased.

[Brief description of the drawings]

FIG. 1 is an external view showing an embodiment of a projection liquid crystal display device of the present invention.

FIG. 2 is a diagram illustrating a method of using the projection liquid crystal display device of the present invention.

FIG. 3 is an external view showing a display state of a liquid crystal panel when the projection liquid crystal display device of the present invention is mounted on a slide projector in which a film is dropped in the direction of gravity.

FIG. 4 is an external view showing a display state of a liquid crystal panel when the projection liquid crystal display device of the present invention is mounted on a slide projector of a type in which a film is set by moving a film in a direction perpendicular to gravity. .

FIG. 5 is a block diagram of a circuit chip connected to a liquid crystal panel constituting the projection liquid crystal display device of the present invention.

[Explanation of symbols]

 200 housing 210 control circuit housing 220 liquid crystal panel housing 300 liquid crystal panel 310 glass substrate 311 circuit chip 312 circuit chip 320 glass substrate 321 circuit chip 322 circuit chip 400 control circuit 501 light source 502 lens 610 signal circuit 620 scanning circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H04N 5/74 H04N 5/74 K

Claims (2)

(57) [Scope of request for utility model registration] A circuit chip (311, 312, 321;
322) was mounted on a glass substrate (310, 320).
A liquid crystal panel (300) and a display for displaying the liquid crystal panel;
A control circuit (400) for generating a signal for
Liquid crystal panel storage section (220) for storing the panel and the control
A control circuit storage unit (210) for storing a circuit;
A body housing (200), said output of said control circuit.
Supply power to the circuit chip, and output the circuit chip
Supply to the electrode (390) on the glass substrate
The light source (501) of the slide projector (500) and the lens
In the projection liquid crystal display device in which the liquid crystal panel accommodating portion is mounted during the period (502) to perform enlarged display, the circuit chip is provided.
A signal circuit (610) and a scanning circuit (620)
The output of the signal circuit as the output of the circuit chip
Signal circuit selection means (TG
1) and the output of the scanning circuit is the output of the circuit chip.
Scanning circuit selecting means (T
G2), wherein the circuit chip has the control
From the circuit, a signal (S2,
S3) and a signal (S4,
S5), selecting means for the signal circuit and selecting for the scanning circuit.
And a selection signal (S1) for controlling the selection means.
And the signal circuit selecting means and the scanning circuit selecting means.
One is selected and the other is unselected
The output of the signal circuit and the scanning
One of the outputs of the circuit is the output of the circuit chip.
A switch, which is adopted as a force and is provided on the housing,
The liquid crystal panel is switched by switching the switch (203).
Rotate the image displayed on the panel 90 degrees, and in the direction of gravity
A slide projector that drops the film and gravity
To set the film by moving in the direction perpendicular to
Normal orientation when mounted on any of the Ip slide projectors
A liquid crystal display device for projection, characterized in that the liquid crystal display device is configured so as to be able to display images on a display. 2. The signal circuit selecting means and the scanning circuit.
Transmission means means transmission gate
And the logic of the selection signal in the circuit chip
An inverted signal (S6) is created, and the selected signal is
Using the inverted signal, the signal circuit selecting means and the
That the scanning circuit selection means is controlled.
The liquid crystal display device for projection according to claim 1, wherein: