Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Voltage multi-attenuation control device

A technology of attenuation control and voltage, applied in electrical components, generation of electrical pulses, pulse processing, etc., can solve the problem of space occupied by digital multiplier 6

Inactive Publication Date: 2011-01-26
HOLTEK SEMICON
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above two input signals will be processed, one way is to multiply them to obtain the desired attenuation rate, however, the digital multiplier 6 will take up a lot of space and require a lot of power

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
  • Voltage multi-attenuation control device
  • Voltage multi-attenuation control device
  • Voltage multi-attenuation control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] In order to fully understand the features and effects of the present invention, the present invention will be described in detail by means of the following specific embodiments and accompanying drawings, as follows: figure 2 and image 3 They are respectively a functional block diagram and a circuit example diagram of a specific embodiment of the present invention, please refer to figure 2 and image 3 , the present invention is a voltage multiple attenuation control device 7, comprising: a pulse width modulation signal input terminal 8 to input a pulse width modulation signal; a digital signal input terminal 9 to input a digital signal; a power Signal to analog signal unit 10, which receives the pulse width modulation signal and converts it into a first analog signal A100% and a second analog signal A%, wherein the potential of the second analog signal A% is lower than the first Analog signal A100%; a digital signal to analog signal unit 11, which receives the digi...

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 voltage multi-attenuation control device which can receive multi-attenuation control signals and combines the signals in an analog mode. Thus, an analog-digital converter required in the traditional voltage multi-attenuation control device is removed, and a pulse width modulation signal can be correctly produced. Compared with the prior art, the invention can reduce the circuit use area and use power of the entire device.

Description

technical field [0001] The invention relates to a voltage multiple attenuation control device, especially a device that does not need an analog-to-digital converter and can still generate pulse width modulation signals correctly. Background technique [0002] Currently, LEDs are used as backlight components for flat panel displays, which have gradually replaced CCFL backlight components. The attenuation characteristic of the backlight element can provide a better viewing experience and save energy. Compared to CCFL, LED can provide better attenuation capability. Backlight brightness can be controlled in many different ways, for example, sensing of ambient light sources or color content. Generally, these controls need to be combined to produce an optimal result. [0003] Such as figure 1 As shown, it is a circuit example diagram of an existing voltage multiple attenuation control device, which includes two sets of attenuation controls, one of which is marked as the pulse ...

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): H03K5/00H03K3/017
Inventor 刘文坤张逸泰
Owner HOLTEK SEMICON
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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