JPH04134320A - Electronic sunglasses - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a control method for electronic sunglasses [Prior Art] Conventional electronic sunglasses have two gradations when using IIi crystal panels for lenses. For those with multiple gradations, a threshold was created for the illuminance value and the transmittance was determined based on whether the threshold was exceeded or not.For multi-gradation devices, the gradation was determined by creating multiple thresholds. Furthermore, in the case of lenses using electrochromic, the transmittance was determined manually.

[Problem that the invention aims to solve]

However, in the above-mentioned conventional technology, when the lens uses a liquid crystal panel, the two-gradation type cannot be used when the illuminance suddenly changes around the illuminance threshold, that is, when it suddenly becomes brighter (or darker). Since the transmittance changes according to each condition, the amount of eye adjustment is reduced, which reduces the strain on the eyes.
If the illuminance changes slowly around the illuminance threshold, that is, if it becomes slowly brighter or slowly darker, the transmittance will change as each threshold is exceeded or broken. There is a problem in that the amount of eye adjustment is too much (as opposed to the case described above), and it puts a strain on the eyes. As with gradation, the transmittance changes near the set illuminance, which can put a strain on the eyes.If the illuminance changes slightly near a certain threshold, the transmittance may be high (or low). (There was a problem in that the eyes were strained as the eyelids would repeat.

In addition, in the case of electrochromic lenses, the transmittance does not change due to changes in illuminance simply by manually adjusting the transmittance (there was a problem that the strain on the eyes was not reduced), so the present invention Our objective is to solve these problems and provide electronic sunglasses that can reduce the strain on the eyes as much as possible by controlling the sunglasses' transmittance according to the speed of eye adaptation (dark adaptation and photopic adaptation). do.

[Means for Solving the Problems] Electronic sunglasses of the present invention include: a measurement unit that measures external information such as illuminance; a time series creation unit that creates time series external information by adding a delay time to the external information; It has a fuzzy rule consisting of a condition part and a conclusion part, and a combination of the fuzzy rule and a membership function.The fuzzy rule is executed using the time series external information from the time series creation part and is based on the membership function. It is characterized by comprising: a fuzzy inference section that determines a control amount; and a transmittance control section that receives the control amount and generates a transmittance control signal that controls the transmittance of the sunglasses.

〔Example〕

FIG. 1 is a basic block diagram of one embodiment of the electronic sunglasses of the present invention. 1 is a measurement unit, 2 is external information, 5 is a time series creation unit, 4 is time series external information, 5 is a time series creation unit 5 that has both a memperntube function 6 and a fuzzy rule 7.
A fuzzy inference section 9 performs fuzzy inference based on time series external information 4 from the fuzzy inference section 5; a transmittance control section 9 controls the transmittance of the sunglasses using a control amount 8 from the fuzzy inference section 5; These sunglasses change the transmittance in response to a transmittance control signal 10. First, a measuring unit 1 measures external information 2 such as illuminance, and a time-series generating unit 3 creates time-series external information 4 by adding a delay time to the external information 2.
The fuzzy inference unit 5 applies the fuzzy rule 7 to the time-series external information 4 and calculates the control amount 8 based on the membership function 6.
The transmittance control section 9 generates a transmittance control signal 10 based on the control amount 8, and the sunglasses 11 change the transmittance based on the transmittance control signal 10.

FIG. 2 is a diagram of one embodiment of the present invention. 12 is a positive power supply, 15 is a photodiode, 14 is a resistor, 15 is a ground, 16 is an analog illuminance signal, 17 is a to/D converter, 18 and 20 are registers that output the input signal after one delay time, and 22 is a delay time 0 digital illuminance signal, 23
24 is a digital illuminance signal with delay time 1, 25 is a digital illumination signal with delay time 3, 26 is a delay clock that determines the delay time and synchronizes the registers 18 to 20, and 27 is a digital illuminance signal with delay time 1. c p u.

29 via the data bus 28. The memory where PU27 reads and writes fuzzy rules, membership functions, etc., SO is C! A control amount outputted by the PU 27, 61 a transmittance control section, 32 a transmittance control signal, 53
are sunglasses. Further, FIG. 5 is an example of a short-circuit current-illuminance characteristic diagram of the photodiode 15. As shown in FIG. 6, the amount of current flowing through the photodiode 21 is determined by the illuminance, so the current flowing through the resistor 14 is determined, and according to Ohm's law, the voltage of the analog illuminance signal 16 is determined by the illuminance. Therefore, the voltage becomes higher when the illuminance is high (the more the illumination intensity increases).
is determined depending on the illuminance, and the analog illuminance signal 16 is converted into a digital illuminance signal 22 by the A/D converter 17 and sent to the registers 1B and 0PU27.
outputs a digital illuminance signal 23 with a delay time of 1 using a delay clock 26. Similarly, register 19 is register 1
The digital illuminance signal 23 of 8 is output with a delay time of 1, that is, the digital illuminance signal 24 with a delay time of 2 is output with respect to the illuminance signal 22. Similarly, the register 20 outputs a digital illuminance signal 25 with a delay time of three. The CPU applies fuzzy rules to the digital illuminance signals 22 to 25 to determine a control amount 50 based on the membership function, and based on the control amount 30, the transmittance control unit 31 controls the transmittance control signal 3.
2 to change the transmittance of the sunglasses 33.

This embodiment is applied not only to 2@ tone sunglasses but also to multi-tone sunglasses.

Furthermore, we measure not only illuminance, but also temperature and distance.

The amount of ultraviolet rays, the amount of change in illuminance, the transmittance of sunglasses, etc. are also considered, and can be used as materials for fuzzy inference.

〔Effect of the invention〕

As described above, according to the present invention, by setting fuzzy rules and membership functions corresponding to the adaptation speed of the human eye, it is possible to determine the transmittance of sunglasses in consideration of the adaptation speed of the human eye. The burden of adaptation on the human eye can be reduced, and if the sunglasses have gradation, finer control is possible, and the burden on the adaptation of the human eye can be reduced compared to conventional technology. By adding , temporal changes in external information such as illuminance can be easily handled, and the processing time is also improved compared to the conventional method of reading and writing to a memory.

Furthermore, when measuring the two items of ultraviolet radiation and illuminance as external information, it also has the effect of allowing you to select items that are burdensome or harmful to the eyes.

[Brief explanation of drawings]

FIG. 1 is a basic block diagram of one embodiment of the electronic sunglasses of the present invention. FIG. 2 is a diagram of one embodiment of the present invention. FIG. 5 is a short-circuit current-illuminance characteristic diagram of the photodiode 15. 1...Measuring section 2...External information 3...Time series creation section 4...Time series External information 5...Fuzzy inference section 6...Membership function 7...
......Fudgel del 8......Control amount 9...Transmittance control section 10...Transmittance control signal 11.35.・
...Sunglasses 12...Positive power supply 13...Photodiode 14...
...Resistor 5...Ground 6...Analog illuminance signal 7...
・・・A/D converter 7 ・・・・・・・・・
CPU 8...Data bus 9...Memory O...Control amount 1...Transmittance control Part 2...Transmittance control signal 8-20...Register 2 that outputs the input signal after one delay time...Digital illuminance with delay time O signal 5
......Digital illuminance signal with delay time 1 4.
......Digital illuminance signal 3 with delay time 2...
...Digital illuminance signal 6 with delay time 6...
...J... Delayed clock or more Applicant Seiko Epson Co., Ltd. Agent Patent attorney Kizobe Suzuki (and 1 other person) Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of claims] Electronically controlled sunglasses, comprising: a measurement unit that measures external information such as illuminance; a time series creation unit that adds a delay time to the external information to create time series external information; a condition unit; and a conclusion. a fuzzy rule that has both the fuzzy rule and a membership function, and executes the fuzzy rule using the time series external information from the time series creation unit to determine a control amount based on the membership function. Electronic sunglasses comprising: an inference section; and a transmittance control section that receives the control amount and generates a transmittance control signal for controlling the transmittance of the sunglasses.