CN201259590Y

CN201259590Y - Liquid crystal filter screen control circuit and liquid crystal filter screen equipped with the control circuit

Info

Publication number: CN201259590Y
Application number: CNU2008200155568U
Authority: CN
Inventors: 邓玉阁; 王书年
Original assignee: Individual
Current assignee: Liaoning Jinyang Photoelectric Co Ltd
Priority date: 2008-09-12
Filing date: 2008-09-12
Publication date: 2009-06-17
Anticipated expiration: 2018-09-12

Abstract

Disclosed is a liquid crystal filter screen control circuit, which is composed of an ATMEGA 48V singlechip and an external circuit. The 28 pin of the singlechip is connected with the contact point of a photoelectric conversion circuit composed of a photosensitive diode D and a resistor R1; the 15 pin and the 16 pin are respectively connected with two input electrodes of a LCD panel; the 24 pin, 25 pin, 26 pin and the 32 pin are respectively connected with ground through a switch S1, S2, S3 and a switch S4; the 4 pin and the 6 pin are connected in parallel to be connected with the anode; the 3 pin and the 5 pin are connected in parallel to be connected with ground; the 18 pin is connected with the anode of a power supply; the 21 pin is connected with ground; a capacitor C is connected between the 18 pin and the 21 pin in parallel; the 9 pin and the 10 pin are respectively connected with a double-color indicator LED through a resistor R2 and a resistor R3. When the control circuit is adopted, an automobile liquid crystal filter screen realizes the maximum controllable darkness adjustment and has daytime and nighttime two operation modes.

Description

Liquid crystal filter screen control circuit and the liquid crystal filter screen that is provided with this control circuit

One, technical field

The utility model relates to auto parts and components, particularly a kind of automobile liquid crystal filter screen control circuit and the liquid crystal filter screen that is provided with this control circuit.

Two, background technology

For overcoming traditional automotive sunshade panel use inconvenience that exists and the shortcoming that makes driver's constriction of visual field, a kind of automobile liquid crystal filter screen has appearred at present.It is made of liquid-crystalline glasses, control circuit and housing.When the driver ran into extraneous strong illumination, liquid-crystalline glasses its transmittance under the control circuit control of adopting opto-electronic conversion reduced with the raising of intensity of illumination, and glass is by bright deepening, and making driver's eyes avoid high light thus stimulates, and helps traffic safety.Chinese patent ZL98218699.1 and ZL200420032226.1 disclose a kind of automobile-used Automatic color-changing plate and variable color window respectively, and the control circuit of its liquid-crystalline glasses is for being made of NE555 and CD4013 integration module and external circuits thereof.The shortcoming of this kind control circuit, the one, circuit parameter is in case determine that its maximum controlled darkness is changeless.And each driver is to the adaptedness difference of light and shade, and what have likes darkness big, and what have is then opposite.This control circuit can not accomplish to make the maximum controlled darkness of liquid-crystalline glasses adjustable, accomplish because of the people suitable.Second shortcoming is, this control circuit is only applicable to day driving, and when driving at night, its meeting beam reaction sensitivity that dead ahead is penetrated is low, the other side's high beam also usually can not variable color apart from liquid-crystalline glasses outside 30 meters even 20 meters in this car, has lost it and has used meaning.

Three, utility model content

The purpose of this utility model provides a kind of liquid crystal filter screen control circuit and is provided with the liquid crystal filter screen of this control circuit.The liquid crystal filter screen uses its maximum controlled darkness of this control circuit adjustable; Also have the pattern of using night simultaneously, the meeting beam that night, the dead ahead occurred is just being begun to control variable color at a distance.

The liquid crystal filter screen control circuit that the utility model provides is made of ATMEGA48V single-chip microcomputer and external circuits, and its external circuits comprises: single-chip microcomputer 28 pin join with the contact of the photoelectric switching circuit that is made of photodiode D and resistance R 1; 15 and 16 pin of single-chip microcomputer join with two input electrodes of liquid-crystalline glasses LCD respectively; 24 pin of single-chip microcomputer are by switch S 1 ground connection; 25 pin of single-chip microcomputer are by switch S 2 ground connection; 26 pin of single-chip microcomputer are by switch S 3 ground connection; 32 pin of single-chip microcomputer are by switch S 4 ground connection; 4 and 6 pin of single-chip microcomputer and connect after connect positive source; 3 and 5 pin of single-chip microcomputer also connect back ground connection; 18 pin and the positive source of single-chip microcomputer join, 21 pin ground connection, shunt capacitance C between 18 pin and 21 pin; 9 and 10 pin of single-chip microcomputer join by 1 and 3 pin of resistance R 2 and R3 and bi-colour LED LED respectively, the 2 pin ground connection of LED.S4 is a starting switch in the utility model liquid crystal filter screen control circuit, and closure during work is opened when not working.S3 is a mode conversion switch, opens to using pattern daytime, and is closed for using pattern night.Use pattern night, control circuit is penetrated the light reflection sensitivity that comes to the place ahead and is improved, and remote (outside 150 meters) are that the may command liquid-crystalline glasses begins variable color.S2 and S1 are that maximum controlled darkness is regulated push switch, by the operating voltage of these two switch regulating circuits, thus the maximum controlled darkness of regulating the liquid crystal filter screen.Press S1, maximum controlled darkness diminish (liquid-crystalline glasses is bright more); Press S2, maximum controlled darkness becomes big (liquid-crystalline glasses is dark more), and the driver can regulate voluntarily according to the hobby of oneself.

The liquid crystal filter that the utility model provides shield its liquid-crystalline glasses and housing same as the prior art, just its control circuit is the liquid crystal filter screen control circuit that the utility model provides.

Four, description of drawings

Accompanying drawing is the schematic diagram of the utility model liquid crystal filter screen control circuit.

Five, embodiment

In conjunction with the accompanying drawings, the utility model liquid crystal filter screen control circuit is made of ATMEGA48V single-chip microcomputer and external circuits, its external circuits comprises: be connected in series the photoelectric switching circuit that constitutes by photodiode D and resistance R 1, photodiode D negative pole connects positive source, and the contact of D and R1 and single-chip microcomputer 28 pin join; 15 and 16 pin of single-chip microcomputer join with two input electrodes of liquid-crystalline glasses LCD respectively; 24 pin of single-chip microcomputer are by switch S 1 ground connection; 25 pin of single-chip microcomputer are by switch S 2 ground connection; 26 pin of single-chip microcomputer are by switch S 3 ground connection; 32 pin of single-chip microcomputer are by switch S 4 ground connection; 4 and 6 pin of single-chip microcomputer and connect after connect positive source; 3 and 5 pin of single-chip microcomputer also connect back ground connection; 18 pin of single-chip microcomputer connect positive source, 21 pin ground connection, shunt capacitance C between 18 pin and 21 pin; 9 and 10 pin of single-chip microcomputer join by 1 and 3 pin of resistance R 2 and R3 and bi-colour LED LED respectively, the 2 pin ground connection of LED, the different colours of bi-colour LED LED demonstrate circuit daytime and night different working modes.The supply voltage of entire circuit is+5V to provide (figure slightly) by vehicle power.

Same as the prior art in view of liquid-crystalline glasses and housing parts that the utility model liquid crystal filter is got rid of beyond the control circuit, unnecessaryly provide its accompanying drawing again and give unnecessary details at this.

Claims

1, liquid crystal filter screen control circuit is characterized in that be made of ATMEGA 48V single-chip microcomputer and external circuits, its external circuits comprises: single-chip microcomputer (28) pin joins with the contact of the photoelectric switching circuit that is made of photodiode (D) and resistance (R1); (15) of single-chip microcomputer and (16) pin join with two input electrodes of liquid-crystalline glasses LCD respectively; (24) pin of single-chip microcomputer is by switch (S1) ground connection; (25) pin of single-chip microcomputer is by switch (S2) ground connection; (26) pin of single-chip microcomputer is by switch (S3) ground connection; (32) pin of single-chip microcomputer is by switch (S4) ground connection; (4) of single-chip microcomputer and (6) pin and connect after connect positive source; (3) of single-chip microcomputer and (5) pin also connect back ground connection; (18) pin and the positive source of single-chip microcomputer join, (21) pin ground connection, shunt capacitance (C) between (18) pin and (21) pin; (9) of single-chip microcomputer and (10) pin respectively by resistance (R2) and (R3) and bi-colour LED LED (1) and (3) pin join (2) pin ground connection of LED.

2, the liquid crystal filter screen has liquid-crystalline glasses and housing, it is characterized in that, liquid crystal filter screen control circuit as claimed in claim 1 is arranged.