JPS61126540A - Camera - Google Patents

Abstract

PURPOSE:To perform a free selection of the array of a display part, and to obtain a camera with a crystal display plate which reduces complicates decoding by driving data imprinting liquid crystal on a static basis and driving part or the whole of liquid crystal for display dynamically. CONSTITUTION:A common signal COM from a common signal generator COM(S) is an unmodulated pulse wave, but common signals COM1 and COM2 from a common signal generator COM(D) are modulated pulse waves and the COM2 has a 1/2 phase shift from the COM1. Consequently, all segments of liquid crystal LCD1 for imprinting and SEG-SEGib of liquid crystal LCD2 for display are driven statically and SEGi+lb-SEGnb of LCD2 are driven dynamically. Data on a data (year, month, day, hour, and minute) is inputted to SEGlb-SEGib of the LCD1 and LCD2 and the data information is displayed on the display part while imprinted. Further, data other than the data, i.e. an ISO speed, the number of exposed frames, DX, etc., are inputted to SEGi+l-SEGnb of the LCD2 and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera, and more particularly to an improvement in a camera that can record photographing date information such as date on the film surface.

[Conventional technology]

Cameras are now available that display date information, such as the date and time of the photograph, on one corner of the film surface along with the photographed scene. Furthermore, as for date information,
Cameras 4 that can selectively capture date information such as the date, hour, and minute instead of the year, month, and day are now available. Since it is convenient for the photographer to have date information displayed on the outside of the camera, some cameras are equipped with a liquid crystal display board on the back of the camera and display the date on the liquid crystal display board.

As is well known, there are two driving methods for liquid crystals: static drive and dynamic drive.
In order to increase the contrast of imprinted and non-imprinted segments and make the characters imprinted on the film clearer,
A statically driven liquid crystal is used.

On the other hand, the liquid crystal display board installed on the outside of the camera is controlled by an IC and displays the date;
Film and camera information, such as the number of shots taken, is often stored in the IC, so the data sent from the IC is switched on the LCD display using the date information segment. Alternatively, it is also possible to provide another display segment and display appropriate information in parallel.

Conventionally, the driving of the liquid crystal display board in a camera, including for photographing and displaying, has been static driving. Figure 3 shows a control circuit for static driving. Code sgo1 to each segment of
．． 8EG2,..., the display section is coded with a large number of lines, and the coding is especially complicated when providing many display sections on one liquid crystal display board. There are many restrictions on the placement of the Friend.

[Problem that the invention seeks to solve]

In the past, the display function of the display section was limited to displaying the date, or even if there were other functions, the circuit shown in Fig. 3 was sufficient, but the display function of the display section was If you try to make it multi-functional, the above limitations will become a serious problem.

The present invention is based on a dual-camera camera that displays information other than date information on a single liquid crystal display panel.The present invention enables free selection of the arrangement of the display parts and reduces complicated coding. The purpose is to provide a camera with a display board.

[Means for solving problems]

The present invention aims to achieve the above-mentioned object, and the present invention has a liquid crystal for including a date and a display liquid crystal, and displays the date and other information on the display liquid crystal. The present invention provides a camera characterized in that the liquid crystal including the date 4 is statically driven, and a part or all of the display liquid crystal is dynamically driven.

〔Example〕

FIG. 1 shows a liquid crystal display (
LCD) display board, FIG. 2 F1 C-M according to the present invention
Static control performed by instructions from O8Y Ico/
This figure shows a control circuit for dynamic combined driving.

Regarding the date, the LCD for monitoring (display) and the LCD for photographing are statically driven in parallel, and on the LCD display board shown in Figure 1, the digits from ■ to ■ are displayed in a white pattern, and the t part is displayed in the photograph. This is the part that is driven in parallel with the closing part.

This date display is a book that allows switching display of year, month, day or hour, minute, and second, and also allows switching display of a mode in which photos are prohibited (OFF). This static drive is done by coding the book.

I, CD display board Teno I 80 sensitivity display (25-1600
.

8 types) are displayed by patterns ■■■■.

■Displays only '0', and '0' is displayed for dynamic (00M2) drive mode.

#″tt film counter/fi is displayed on the LCD display board ~ 39
). ■■ This is for displaying information, and the display is performed by dynamic (COMI, C0M2) drive.

It also enables DX and non-DX compatible displays, DX display,
and ISO display during non-DX is dynamic (COMI
, C0M2) is driven.

The part indicated by the black pattern in Figure 1 is COMI.
The portions displayed by the dynamic drive of the system are shown, and the shaded portions represent the portions that are driven by the dynamic drive of the COM/2 system, and the dynamic drive is performed by nine codings.

Figure WIIz is a circuit diagram of one embodiment of the present invention. One circuit includes a latch circuit LTC that latches data from a control unit such as a microcomputer, a segment driver DR that drives the liquid crystal, a liquid crystal for date imprinting LCD1, and a liquid crystal for display. LCD2, common signal generator CO that sends a pulse signal to the common terminal of the liquid crystal
Consists of M(DI, COM(S) and clock generator).

LCD terminals 8EGla---8BGja, 5EGlb
...S Fi G n b indicates a terminal connected to each pattern segment of the liquid crystal, and 8EGla...1a
lb1 and nb correspond to the segments numbered 1 to 43 in FIG. In the example of Figure 1, 1~
34Fi! ! ! 8EGlb to B'EG turtle b in Figure 2
Compatible with IC, 8E0.10lb N8113G
Corresponds to nb.

The common signal COM+a from COM (S) is a pulse wave that is not modulated as shown in the figure, but the common signal COMI and C0M2 from COM (to) are pulse waves that are modulated as shown in the figure, and for C0M2 and C0MlIC. 1/
This is a two-phase shift. As a result, all segments of LCD1 and 8EGlb-8KGlb of LCDz are statically driven, and 8EGlb-8KGlb of LCD2 is statically driven.
b -8E G n b is dynamically driven.

Date data (06:06 on October 0, 2017) is input to 8EG1 b and 5ues b of LCDt and LCDz.
This date information is displayed on the display section at the same time as the date is imprinted.

Data other than the date, ie, data such as I80 sensitivity, number of photographed frames, DX, etc., are input to 5EGj-)- of the 2LCDz and displayed on the 8EGnb.

In the illustrated implementation row, the t data related to the date is common to the projection liquid crystal and the display liquid crystal, so each segment terminal is connected in parallel to the driver, and the date segment of the display liquid crystal is also statically driven. A circuit structure in which the date segment of the display liquid crystal is dynamically driven is also possible.

Various operations such as date 4 and its display, ISO intuitive display, number of shooting frames display, DX display, etc. can be done using the operation mode switch button (
(not shown).

Although the electrodes are provided only on the top and bottom of the liquid crystal plate in the actual row, it goes without saying that if they are provided around the four circumferences of the liquid crystal plate, it is possible to increase the number of display types.

〔Effect of the invention〕

According to the present invention, it is possible to display many display parts in a relatively free positional arrangement on one LCD display board provided in the camera, and the number of coding parts is far reduced and simplified compared to the conventional method. It became possible to do so.

[Brief explanation of drawings]

FIG. 1 shows a liquid crystal display board provided on a camera showing an embodiment of the present invention, and FIG. 2 shows a drive circuit for a display section according to the present invention, 1s
Figure 3 shows the drive circuit for a conventional display. Figure 3

Claims (1)

[Claims] In a camera having a date imprinting liquid crystal and a display liquid crystal, the date is displayed and other information is displayed on the display liquid crystal, the date imprinting liquid crystal is statically driven, and the displaying liquid crystal is statically driven. A camera characterized in that part or all of the liquid crystal is dynamically driven.