Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Bulb protection circuit applied to projector starting

A light bulb and resistor technology, applied in instruments, optics, projection devices, etc., can solve the problems of many components, unfavorable promotion, low efficiency, etc., and achieve the effect of simple circuit structure, favorable promotion, and few components

Inactive Publication Date: 2019-12-03
广州微驰电子设备有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, many projector bulbs are expensive, and the projector is equipped with a bulb protection circuit when starting, but many bulb protection circuits have complex structures, many components, high cost, and low efficiency, which is not conducive to popularization

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
  • Bulb protection circuit applied to projector starting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0009] The present invention will be further explained below in conjunction with the drawings:

[0010] Such as figure 1 Shown: the present invention includes AC power supply AC, fan motor M, first transformer T1, second transformer T2, relay J, relay switch J-1, bulb L, first resistor R1 to third resistor R3, rectifier BR, stabilizer The voltage diode DW, the diode D, the thyristor SCR, the first capacitor C1, the second capacitor C2 and the potentiometer RP, the first input end of the AC power supply AC is simultaneously connected to the first end of the fan motor M and the primary coil of the first transformer T1 The first terminal is connected to the first terminal of the primary coil of the second transformer T2, the second input terminal of the AC power source AC is connected to the first terminal of the switch K, and the second terminal of the switch K is connected to the primary coil of the second transformer T2 at the same time. The second end, the second end of the fan...

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 invention discloses a bulb protection circuit applied to projector starting. The bulb protection circuit comprises an AC power supply, a fan motor, a first transformer, a second transformer, a relay, a relay switch, a bulb, first to third resistors, a rectifier, a voltage stabilizing diode, a diode, a thyristor, a first capacitor, a second capacitor and a potentiometer. After the switch is closed, the fan motor rotates and the projection bulb is electrified to generate low light. After the AC voltage is converted and rectified, the outputted DC voltage charges the second capacitor. When the second capacitor is charged to the thyristor conduction voltage value, the thyristor is turned on, the relay is closed and the relay switch is closed so that the second resistor is short-circuited and the projection bulb is fully lit. The two transformers are applied to work together, and the charging and discharging characteristics of the capacitors and the conducting characteristics of the thyristors are utilized to achieve the delay effect of the circuit so that the bulb is preheated and the bulb filament is prevented from being burnt out by excessive current. Besides, the circuit structure is simple, the elements are less, the cost is low, the efficiency is high and the circuit is favorable for popularization.

Description

Technical field [0001] The invention relates to a protection circuit, in particular to a bulb protection circuit applied to a projector when it is started. Background technique [0002] With the increasing level of education and the advancement of the electronic age, the requirements for teaching hardware facilities are getting higher and higher. Many electronic products are gradually used to assist teaching, and projectors are important auxiliary teaching electronic facilities. A projector, also known as a projector, is a device that can project images or videos onto the screen. It can be connected to computers, VCDs, DVDs, BDs, game consoles, DVs, etc. through different interfaces to play corresponding video signals. However, many projector bulbs are expensive, and the projector is equipped with a bulb protection circuit at startup. However, many bulb protection circuits have complex structures, many components, high costs, and low efficiency, which are not conducive to popular...

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 Applications(China)
IPC IPC(8): G03B21/20
CPCG03B21/206
Inventor 罗小梅
Owner 广州微驰电子设备有限公司
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
Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com