CN2791740Y

CN2791740Y - Luminous keyboard

Info

Publication number: CN2791740Y
Application number: CN 200420009954
Authority: CN
Inventors: 马少波
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-12-16
Filing date: 2004-12-16
Publication date: 2006-06-28
Anticipated expiration: 2014-12-16

Abstract

The utility model relates to a light-emitting keyboard which comprises a keyboard body, a cold light sheet, a cold light driving circuit and a control switch, wherein the control switch comprises keys, an LED, a resistor, a first triode and a second triode, and the LED, the resistor, the first triode and the second triode are arranged below the keys. The resistor is respectively connected with the LED and the first triode. The collecting electrode of the first triode is connected with the base electrode of the second triode, and the collecting electrode and the base electrode are respectively connected with the cold light driving circuit. The light-emitting keyboard of the utility model controls the cold light sheet to emit light by setting the switch. Thereby, the consumption of electrical energy is reduced and the service life of the cold light sheet is prolonged. Meanwhile, the structure does not need to be changed, and the original appearance of the keyboard can not be affected and the utility model has the advantages of convenient and simple operation and stable performance.

Description

Illuminated keyboard

[technical field]

The utility model relates to a kind of computer keyboard, relates in particular to a kind of illuminated keyboard that still can normally use when insufficient light.

[background technology]

Rapid development of computer technology also drives constantly bringing forth new ideas of peripherals.Computer keyboard has had increasing improvement to its structure, function, profile etc., to satisfy the consumption grade that the consumer improves day by day as the important input equipment of computing machine.Illuminated keyboard promptly is the product under such trend, and it still can normally use under the situation of insufficient light.As described in No. the 02272870.8th, Chinese utility model patent, illuminated keyboard normally is provided with cold light (EL) sheet between button and keyboard case surface, make the cold light conductor on the cold light film luminous by the cold light driving circuit, realizes the function of illuminated keyboard.

But the defective of this illuminated keyboard is: in case the energising cold light film will be luminous always, and under well-lighted situation, need illuminated keyboard performance function first, second the light that cold light film is sent under the high light is invisible, will cause the loss in vain of electric energy thus.In addition, generally be luminous 5000 hours the serviceable life of cold light film, if can suitably reduce its working time, then can its life-span of corresponding prolongation.

[utility model content]

Technical problem to be solved in the utility model is at the defective of prior art, to provide a kind of illuminated keyboard with switch, in order to control the luminous of cold light film.

For solving the problems of the technologies described above, the utility model is achieved through the following technical solutions: a kind of illuminated keyboard, comprise keyboard body, cold light film and cold light driving circuit, it is characterized in that: described illuminated keyboard also is provided with gauge tap, described control is opened the light and is comprised button, is located at LED, resistance, first triode and second triode under the button, described resistance links to each other with described first triode with described LED respectively, the collector of described first triode links to each other with the base stage of second triode, and links to each other with described cold light driving circuit respectively.

The utility model illuminated keyboard is controlled the luminous of cold light film by switch is set, thereby greatly reduces the consumption of electric energy, and can prolong the serviceable life of cold light film.And structure need not to change, and can not influence the keyboard original appearance, and is simple to operation, stable performance.

[description of drawings]

Fig. 1 is the circuit diagram of the utility model illuminated keyboard switch.

[embodiment]

The utility model system selects on the keyboard any one button among Num Lock, Caps Lock, the Scroll Lock to be used as the gauge tap of cold light film.Gauge tap comprises button, is located at LED, resistance, first triode and second triode under the button, described resistance links to each other with the described first triode string with described LED respectively, the collector of first triode links to each other with the base stage of second triode, and links to each other with described cold light driving circuit respectively.LED's lights or extinguishes the different duty of expression in the use.With reference to shown in Figure 1, make gauge tap with Scroll Lock button in the present embodiment.When pressing this button, the LED D1 under it lights, and takes out the low level signal of 0.05mA from described LED D1 by resistance R 1, amplify through the first triode Q1, the signal controlling second triode Q2 conducting after the amplification, cold light driving circuit (figure does not show) work, cold light film EL is luminous; When LED D1 extinguished, first, second triode Q1, Q2 all ended, and had only 0.5V voltage for this moment the cold light drive circuitry, and this voltage can't make the cold light drive circuit works, so power consumption is extremely low.

Claims

1. illuminated keyboard, comprise keyboard body, cold light film and cold light driving circuit, it is characterized in that: described illuminated keyboard also is provided with gauge tap, described control is opened the light and is comprised button, is located at LED, resistance, first triode and second triode under the button, described resistance links to each other with described first triode with described LED respectively, the collector of described first triode links to each other with the base stage of second triode, and links to each other with described cold light driving circuit respectively.

2. illuminated keyboard according to claim 1 is characterized in that: described button is any one button among Num Lock, Caps Lock, the Scroll Lock on the described keyboard body.