JPS62291626A - Character imprinting device for camera - Google Patents

Abstract

PURPOSE:To reduce the number of segments by using a liquid crystal display body as a means for digitally displaying clock information and character information and a means for imprinting the character information on a film surface and driving said display both based on the time division driving. CONSTITUTION:A correcting circuit 6 for time and a calendar and an imprinting information selecting circuit 7 are controlled by an input circuit 5 to select imprinting information and imprinting characters are set up by a character setting circuit 8. The characters are set up by a signal outputted from the input circuit 5. A decoder decodes the imprinting data in the imprinting information selected by the circuit 7 and sends the decoded signal to a liquid crystal body driving circuit 10 and the circuit 10 sends a driving voltage and a driving waveform for executing the 4-division driving of the liquid crystal display body 11. A lamp lighting circuit 12 is driven by an input signal synchronized with a shutter of the camera inputted by the input circuit 5 to light up the lamp 13 and imprint the imprinting information displayed on the display body 11 on the film surface. Consequently, the number of segments can be sharply reduced.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to character imprinting in a camera imprinting device.

[Conventional technology]

Conventional camera imprinting devices are widely known for imprinting the date or time, but the driving method used to display these on the liquid crystal display was static driving. .

(Problems to be Solved by the Invention) However, in the above-mentioned conventional technology, when trying to imprint characters or symbols, the number of segments is significantly larger than that for dates or times, and the camera With the imprinting device, it was difficult to wire the segments due to the large limitation on the area of the mounting board.Therefore, the present invention
This is intended to solve these problems, and its purpose is to use time-division driving as a driving method for a liquid crystal display.

[Means for solving problems]

The character imprinting device for a camera of the present invention comprises: fal means for electro-optically digitally displaying clock information from an electronic clock and character information inputted from the outside; an optical means for imprinting character information on a film surface; (c1) a liquid crystal display is used as the optical display means; .

〔Example〕

Hereinafter, the present invention will be described in detail based on examples.

FIG. 1 shows a block diagram of the present invention. 1 is an oscillation circuit using a crystal resonator or the like. 2 is a frequency dividing circuit, 3 is a time counter that counts hours, minutes, and seconds, and 4 is a calendar counter that counts years, months, and days. 5 is the input circuit, 8
Inputs from external operation switches 1 to S5 and input signals synchronized with the camera shutter in S6 are taken in. Sl is an imprint information selection switch that switches the display of imprint information. Examples of imprint information include time only, calendar only, text only, time and text, calendar and text, time and calendar, and no display.

In step S2, the clock is switched between a normal state and a corrected state, or a character display state and a setting state for setting characters. 33 selects the time correction digit or the character setting digit; S4 and S5 select the time (in the II normal state, the time is corrected; in the character setting state,
A correction circuit 6 for setting characters is used to correct the time and calendar, and is controlled by the input circuit 5. Reference numeral 7 denotes an imprint information selection circuit, which is controlled by the input circuit 5 and selects imprint information. Reference numeral 8 denotes a character setting circuit, and the setting of the 0 character for setting characters to be imprinted is set by a signal from the input circuit 5. 9 is a decoder which decodes the imprint data of the imprint information selected by the imprint information selection circuit 7;
0 to the liquid crystal display drive circuit. The 10 liquid crystal display drive circuits send drive voltages and drive waveforms for driving the 11 liquid crystal displays in four time divisions. Further, 12 is a lamp lighting circuit, which is driven by an input signal synchronized with the shutter of the camera inputted by the input circuit 5, and by lighting the lamp 13, the image displayed on the liquid crystal display 12 of 11 is displayed. Imprint information onto the film surface.

FIG. 2 shows a circuit diagram of the imprint information selection circuit.
is time information, 15 is calendar information, and 16 is character information, which are input to the AND circuits 20 to 22. 17 is an imprint information selection switch, which counts 18 3-bit counters for each input. 19 is for resetting the counter of 18. 20.21.
Reference numeral 22 selects one or two of the information in 14.15.16, which is determined by the switch in 17 and the counter in 18, and the imprint information in 24 is selected by the output of the OR in 23. Further, FIG. 3 shows the output of the counter and the selected state of imprint information.

FIG. 4 shows the display state of the liquid crystal panel, and FIG. 0 shows the display state of calendar information for March 15, 1986 and character information ITOKYO*.

〔Effect of the invention〕

As described above, according to the present invention, by driving the liquid crystal display in a time-division manner, the number of segments can be significantly reduced. This was made possible without increasing the size of the device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the present invention. DESCRIPTION OF SYMBOLS 1... Oscillation circuit 2... Frequency division circuit 3... Clock counter 4... Calendar counter 5... Input circuit 6... Correction circuit 7... Imprint information selection circuit 8... Character setting circuit 9...Decoder lO...
・Liquid crystal display drive circuit 11...Liquid crystal display 12・
...Lamp lighting circuit 13...Lamp Figure 2 is a circuit diagram of the imprint information selection circuit. FIG. 3 is a diagram showing a selection state of imprint information. FIG. 4 is a diagram showing the display state of the liquid crystal panel. Applicants Seiko Epson Co., Ltd. Agent, Patent Attorney Tsutomu Mogami and 1 other person (G Figure 4)

Claims (1)

[Scope of Claims] (a) A means for electro-optically digitally displaying clock information such as time and calendar information from an electronic clock and character information, which is information such as characters or symbols inputted from the outside; (b) ) an optical means for imprinting the clock information and the character information displayed by the display means on a film surface; (c) using a liquid crystal display as the optical display means; (d) also; A character imprinting device for a camera, characterized in that the liquid crystal display is driven in a time-sharing manner.