CN2558043Y

CN2558043Y - Electroluminescence multi-section cold light piece information indicator

Info

Publication number: CN2558043Y
Application number: CN 02270883
Authority: CN
Inventors: 黄志伟; 李志光
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-04
Filing date: 2002-06-04
Publication date: 2003-06-25
Anticipated expiration: 2012-06-04

Abstract

The utility model relates to an electroluminescent multi-section cold light film information display unit which consists of a SCM, multi-sections of cold light films, a cold light film power supply and a multiplex driver; wherein the output ends of the multiplex driver are respectively connected with the section electrodes of the multi-section cold light film; the control ends of the multiplex driver are respectively connected with the output ends of the SCM; the common electrode of the multi-section cold light film is connected with the output end of the cold light film power supply; the SCM outputs control quantities to the multiplex driver to further control the light and the dark of the multi-section cold light film and display information. The utility model adopts the electroluminescent multi-section cold light film as the display unit and control luminescence through the multiplex driver; and with low power consumption, long service life and low cost, the utility model which avoids the vision and contrast problems of large area liquid crystal display can be used as a flat panel display screen and a curved panel display screen of an electronic product.

Description

Electroluminescence multistage cold light film information display device

Technical field

The utility model relates to the information display device that is used for electronic product, specifically is the information display device that adopts electroluminescence multistage cold light film.

Background technology

Usually the information display device of electronic product adopts LED nixie display, LCD display etc. more.LED nixie display section drive current is bigger, and it is big to be used for large tracts of land product power consumption, and cost increases.At present, the red-light LED low price, blue, white, green, orange light LED up-to-date price is higher, not too is fit to consumption temper product.

LCD is by anaclasis and principle of reflection show message, existence can not luminous and narrow visual angle and contrast owe desirable problem, the product that has often needs additionally to increase backlight.(as 150mm * when 100mm) using, LCD is because of the rate restriction that manufactures a finished product, cost is higher in large tracts of land.

In addition, LCD and light-emitting diode display can not be crooked because of structural relation own, are used with planar products and owe desirable.LCD and light-emitting diode display are because of production technology own, and the display pattern design must cooperate many cover films and mould of plastics to make the production cost height.

Summary of the invention

The purpose of this utility model is to overcome the above-mentioned deficiency of prior art, and a kind of information display device that adopts electroluminescence multistage cold light film is provided, to satisfy the demand of electronic product to low-power consumption, low-cost display device.

This electroluminescence multistage cold light film information display device, comprise: single-chip microcomputer, multistage cold light film, cold light film power supply and multiplex driver, each output terminal of multiplex driver connects a segment electrode of multistage cold light film respectively, each control end of multiplex driver connects an output control terminal of single-chip microcomputer respectively, the public electrode of multistage cold light film connects the output of cold light film power supply, single-chip microcomputer output controlled quentity controlled variable is to the multichannel driver, by bright/the dark and display message of multiplex driver control multistage cold light film.

The utility model display device adopts electroluminescence multistage cold light film as display unit, multiplex driver driven for emitting lights by a special use, low in energy consumption, cost is low, solve vision and contrast problem that the large-area liquid crystal body shows, and the principle of luminosity of itself also can make us seeing clearly Chu under dark situation.

Electroluminescence multistage cold light film is the main means of production with serigraphy, and cost is low, can be used as the flat-faced screen of clock and watch etc., and the principal character of clock and watch design is light and handy, and this is just meeting one of them characteristic of multistage cold light film.The demonstration of electroluminescence multistage cold light film also is suitable for indoor application such as image information displaying device in addition, is suitable for the big or small area of plane and nonplanar design, and it is supporting that its curved design is particularly suitable for the curved surface electronic product.

Description of drawings

Fig. 1 is a principle schematic of the present utility model;

Fig. 2 is the embodiment synoptic diagram of its electroluminescence multistage cold light film;

Fig. 3 implements illustration for its multiplex driver;

Fig. 4 is several segment drive circuit figure of its multiplex driver;

Fig. 5 is the intednsity circuit schematic diagram of its multistage cold light film;

Fig. 6 is the circuit diagram of its cold light film power supply;

Fig. 7 is the demonstration and the drive part circuit diagram of its application examples timepiece display apparatus;

Fig. 8 is for being the cut-away view of the single-chip microcomputer of its application examples timepiece display apparatus.

Embodiment

Further specify below in conjunction with the embodiment accompanying drawing.

Information display device shown in Figure 1 mainly comprises: the intednsity circuit of single-chip microcomputer, multistage cold light film, cold light film power supply, multiplex driver and cold light film.Each output terminal of multiplex driver connects a segment electrode of multistage cold light film respectively, each control end of multiplex driver connects an output control terminal of single-chip microcomputer respectively, the public electrode of multistage cold light film connects the output of cold light film power supply, and the cold light film power supply is received direct supply by intednsity circuit.Wherein, single-chip microcomputer has M output terminal, and M section cold light film can be formed N bit digital display unit again, and the output terminal that each section cold light film also need single chip microcomputer goes control, single-chip microcomputer output controlled quentity controlled variable is to the multichannel driver, by bright/the dark and display message of multiplex driver control multistage cold light film.

The section of multistage cold light film can be strip, point-like etc., and the section of multistage cold light film can be formed the long number display unit, or pattern displaying unit, or image-display units, or character image.Embodiment such as Fig. 2 of electroluminescence multistage cold light film.Wherein, Fig. 2 a-d is respectively 7 hop count sign indicating numbers, dot matrix, M shape and clock and watch display board multistage cold light film structural representation.

Fig. 3 is the cut-away view of its multiplex driver chip.Multiplex driver is made up of the NPN transistor of a plurality of common emitters, also can be made up of a plurality of common emitter PNP transistors.Multiplex driver also can be by independently a plurality of NPN transistor or PNP transistor are formed.Also can adopt some transistors to make up when needing according to specific design.

Fig. 4 a, b, c, d are respectively the segment drive circuit examples of multiplex driver.

Fig. 4 a adopts NPN transistor control, and the multistage cold light film connects the cold light film power supply, and a section of multistage cold light film is received the collector of Q1, the Q1 grounded emitter, and the Q1 base stage connects control signal by resistance.In the time of the deepening of control cold light film, transistorized base stage can be controlled to be logical zero, transistor makes the loop of cold light film be blocked because of not conducting, cold light film so and deepening.When the base stage of oxide-semiconductor control transistors is logical one, electric current injects transistorized base stage and makes transistor turns through bias resistance, so transistor ground connection can be passed through in the loop of cold light film, can make cold light film loop ground connection make it become light according to this principle.During actual the use, the Q1 base stage connects an output terminal of single-chip microcomputer by resistance.Fig. 4 b adopts the PNP transistor driving, and principle is with Fig. 4 a.

Fig. 4 c is another kind of Drive and Control Circuit, adopts NPN transistor control, and base stage connects power supply by resistance, and emitter connects control signal.One of cold light film terminates in the supply of cold light film power supply, and the other end then is connected on the transistorized collector.And transistorized base stage is connected on the DC voltage through bias resistance, and the bright of control cold light film secretly promptly controlled by transistorized emitter.When logical one was launched very in control, the voltage of emitter and base stage was identical, so transistor can conducting, not conducting of transistor makes the loop of cold light film be blocked, and cold light film also therefore and deepening.When logical zero is launched very in control, the voltage of base stage is higher than the voltage of emitter, electric current injects transistorized base stage and makes transistor turns through bias resistance, so transistor ground connection can be passed through in the loop of cold light film, can make cold light film have the loop to make it become light to ground according to this principle.Fig. 4 d adopts the PNP transistor as the bright dark control of cold light film, and the similar Fig. 4 d of its principle is not giving unnecessary details.

Fig. 5 is the intednsity circuit schematic diagram of its multistage cold light film; Intednsity circuit is connected between the direct supply of cold light film power supply and cold light film power supply.This intednsity circuit is made up of a transistor Q11 and a photoresistance R11, and photoresistance is connected between transistorized base stage and the collector, and transistorized collector is received direct supply, and transistorized emitter connects the cold light film power supply.

The strong and weak control of cold light film brightness utilizes the device of photoresistance as testing environment luminosity, when the environment deepening, photoresistance R11 makes resistance promote because of luminosity reduces, because photoresistance is the bias resistance of transistor Q11 simultaneously, therefore so the transformation of photoresistance resistance is equivalent to the bias voltage different with transistor Q11, what of cold light film power supply supply input the control by transistor biasing be equivalent to control.And when cold light film power supply input voltage supplied reduced, the output voltage of cold light film power supply supply also reduced relatively, and cold light film also therefore and deepening, changed according to the luminosity of environment and can regulate the brightness of cold light film automatically.

The cold light film power supply can adopt general cold light film power supply, buys in electronic component market.Fig. 6 is an embodiment of cold light film power supply, and it is by the formations such as resistance (R1, R2), electric capacity (C1, C2) and step-up transformer T1 of transistor Q1, periphery.Because the operating voltage of cold light film is high-tension alternating current, generally also near between 100 to 150 volts, so transistorized collection emitter-base bandgap grading is the characteristic that need support the cold light film operating voltage to emitter voltage.

Below in conjunction with Fig. 7,8 its application examples timepiece display apparatus of explanation.Device adopts the clock and watch display board multistage cold light film structure shown in Fig. 2 d, comprising: the demonstration of three bit digital demonstrations, two digits and some patterns and literal.The cold light film display unit is made up of 28 sections cold light film, and the multichannel electricity cause chip for driving also need 28 the road chip for driving go to control cold light film bright/dark.

Its single-chip microcomputer need have equally 28 output pin positions go to control cold light film bright/dark.Because each is the state that can be set at logical one or logical zero, so can arbitrarily logical one (or logical zero) be set at the state that the control cold light film brightens, and logical zero (or logical one) be set at the state of control cold light film deepening.During the state that if employing is the control cold light film with the logical one to brighten, the multichannel electricity causes the internal structure of chip for driving and then will form with 28 NPN transistor.

Fig. 7 is the demonstration and the drive part circuit diagram of its application examples timepiece display apparatus.Wherein the cold light film display unit includes: three digital elements numeral shows that the numeral of (needing 21 sections cold light film), two numerals one shows that (needing two sections cold light film), two digital pattern AM, PM show (needing two sections cold light film), two round dot type pattern displaying and a bell pattern displaying (needing three sections cold light film), so total hop count of cold light film is 28 sections; Each section is connected to an output terminal of multichannel chip for driving.

Single-chip microcomputer can adopt the AT89C51 chip in the general ATMEL 8051 microprocessor series etc., wherein Fig. 8 is the main inner structure of AT89C51 single chip microcomputer, and main assembly comprises: I/O control interface, timer 0 and the timer 1 and the interrupt control etc. of eight central processing units, 4K byte program ROM, 128 byte data RAM, four group octets.The particulars of this chip can be with reference to ATMEL 8051 microprocessors series handbook.

The AT89C51 single-chip microcomputer has the I/O control end of four group octets, so be to reach bright/secretly requirement of state of being gone to control cold light film by each.And wherein the output control terminal mouth of three group octets can be set at the demonstration of three digital element numerals, because per seven is to control seven sections cold light film, shows so the output control terminal mouth of three group octets can be controlled three digital elements numerals.And other pattern displaying is need seven sections cold light film, so the output control terminal mouth of a group octet then can have been controlled remaining pattern displaying.

Aspect the information display setting, when set need show information the time, can be with information temporary storage (address be that 30H is to 7FH) in the general service internal memory of single-chip microcomputer.The interior numerical value of eight buffers of numeral of setting single-chip microcomputer again is an integer numerical value, can be used as the time that lastest imformation shows of adjusting by the integer numerical value that reduces in the buffer.Its principle is: in the time of one period display cycle, single-chip microcomputer is by extracting institute's palpus display message in the general service internal memory, thereafter single-chip microcomputer through the output control terminal mouth of four group octets with the information that must show output to the more road chip for driving, and the multichannel chip for driving through control multistage cold light film bright/dark and upgrade the information that need show.

Claims

1, a kind of electroluminescence multistage cold light film information display device, it is characterized in that comprising: single-chip microcomputer, multistage cold light film, cold light film power supply and multiplex driver, each output terminal of multiplex driver connects a segment electrode of multistage cold light film respectively, each control end of multiplex driver connects an output terminal of single-chip microcomputer respectively, and the public electrode of multistage cold light film connects the output of cold light film power supply.

2, according to the described electroluminescence multistage of claim 1 cold light film information display device, it is characterized in that: the section of multistage cold light film can be formed the long number display unit, or pattern displaying unit, or character image, or image-display units.

3, according to the described electroluminescence multistage of claim 1 cold light film information display device, it is characterized in that: multiplex driver is made up of a plurality of common emitter NPN transistor or PNP transistor.

4, according to the described electroluminescence multistage of claim 1 cold light film information display device, it is characterized in that: multiplex driver is made up of a plurality of NPN transistor or PNP transistor.

5, according to the described electroluminescence multistage of claim 1 cold light film information display device, it is characterized in that: be provided with the intednsity circuit of a multistage cold light film, the cold light film power supply is received direct supply by this intednsity circuit.

6, according to the described electroluminescence multistage of claim 1 cold light film information display device, it is characterized in that: described intednsity circuit is made up of a transistor and a photoresistance, photoresistance is connected between transistorized base stage and the collector, and transistorized collector is received direct supply.