Piezoelectric inverter power supply for cold-cathod lamp as scanning head light source of scanning instrument

A technology of inverter power supply and cold cathode, which is applied in the direction of light source, electric light source, and irreversible DC power input is converted into AC power output, etc. The effect of small electromagnetic interference and simple structure

Inactive Publication Date: 2006-06-21
西安康弘新材料科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing scanners using traditional wire-wound transformers to increase the voltage to ignite cold-cathode lamps, and use chip piezoelectric ceramic transformers to form piezoelectric inverter power supplies for scanner cold-cathode lamps

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Piezoelectric inverter power supply for cold-cathod lamp as scanning head light source of scanning instrument
  • Piezoelectric inverter power supply for cold-cathod lamp as scanning head light source of scanning instrument
  • Piezoelectric inverter power supply for cold-cathod lamp as scanning head light source of scanning instrument

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0008] In order to understand the content of the present invention more clearly, further description will be made below in conjunction with the accompanying drawings:

[0009] When a certain DC voltage is applied by the external power supply 1, the multivibrator circuit 2 starts to work and generates a frequency f s A square wave voltage output whose frequency depends on the resistor R 1 , R 2 , capacitance C 1 and resistor R 3 , R 4 , capacitance C 2 , the square wave voltage is generated by the transistor Q 1 or Q 2 Collector output, through resistor R 5 , capacitance C 3 Composed of coupling circuit 3 output, through the transistor Q 3 with transistor Q 4 Complementary tube drive circuit 4 composed of amplified, and then MOS-FET tube Q 5 and series inductance L 1 Composed of switching power amplifier output, drive chip piezoelectric ceramic transformer 6 step-up output (chip piezoelectric ceramic transformer resonant frequency is f t ), light the cold cathode l...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The present invention relates to a DC / AC power supply, in particular to a piezoelectric inverter power supply for a scanning head light source cold cathode lamp tube of a scanner. The piezoelectric inverter power supply is mainly composed of a multivibrator circuit 2 and an RC coupling circuit 3 , Complementary tube drive circuit 4, MOS-FET tube amplifier circuit 5, chip piezoelectric ceramic transformer 6, cold cathode lamp tube 8 damage protection circuit 7, with simple structure, small size, low power consumption, no need for short circuit protection, working It has the advantages of small electromagnetic interference, non-combustion, stability and reliability.

Description

technical field [0001] The invention relates to a DC / AC power supply, in particular to a piezoelectric inverter power supply for a cold cathode lamp tube of a scanning head light source of a scanner. Background technique [0002] There are two types of scanner lighting sources currently on the market. One is to use light-emitting diodes as light sources, and the other is to use cold-cathode lamps as light sources. Because light-emitting diodes have low luminous efficiency, most of them use cold-cathode lamps. Cathode lamps are used as light sources. These two types of scanner lighting sources generally use traditional wire-wound transformers to achieve voltage conversion to achieve the voltage required by light-emitting diodes or cold-cathode lamps, especially cold-cathode lamps. An excitation voltage of more than 1,000 volts can cause the gas in the cold cathode lamp to breakdown and ionize to produce glow discharge and emit light. Using a traditional wire-wound transformer...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/288H02M7/42
Inventor 陈耀强侯志俊
Owner 西安康弘新材料科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap