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

Keypad test and display driver integrated circuit and control method thereof

A technology for displaying driving and detecting circuits, applied in electrical program control, circuit breaker testing, program control in sequence/logic controllers, etc. Simple computer interface

Inactive Publication Date: 2013-04-17
MIDEA GRP CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the circuit system is more complex and more buttons and light-emitting tubes need to be expanded, more GPIOs need to be expanded accordingly, and the cost is higher

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
  • Keypad test and display driver integrated circuit and control method thereof
  • Keypad test and display driver integrated circuit and control method thereof
  • Keypad test and display driver integrated circuit and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0021] like figure 2 , image 3 As shown, a key detection and display drive integrated circuit includes a microcontroller MCU, a key detection circuit 1, a display drive circuit 2 and 3 general-purpose input and output ports GPIO.

[0022] The button detection circuit 1 includes 9 resistors and 4 buttons, wherein the first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, and the fifth resistor R5 are connected in series, and the other end of the first resistor R1 is connected to the button detection circuit. The GPIOs are connected, and the other end of the fifth resistor R5 is connected to the power supply VCC. One end of the first button KEY1 is connected to the connection point of the first resistor R1 and the second resistor R2, and the other end is grounded through the sixth resistor R6; one end of ...

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 relates to a keypad test and display driver integrated circuit and a control method thereof. The integrated circuit comprises a macro control unit (MCU), a keypad test circuit, a display driving circuit and general purpose input / output (GPIO) lines, wherein the keypad test circuit and the display driver circuit are connected with the MCU through the GPIO. The integrated circuit is characterized in that the keypad test circuit and the display driver circuit multiplex one or a plurality of the GPIO; and the GPIO connected with the keypad test circuit serves as an AD conversion port simultaneously. The invention solves the recognition problem of increased keypad tests and the display driver problem under the condition of less GPIO, is in no need of expanding any other device, can improve the GPIO service efficiency and effectively reduce the product cost on the premise of not influencing the product performance, and is applicable to various electrical equipment requiring the keypad test and display circuit.

Description

technical field [0001] The invention relates to a key detection and display driving integrated circuit, which is suitable for key detection and display driving of various electrical equipment. The invention also includes a control method of the integrated circuit. Background technique [0002] When the existing control system has fewer general-purpose input and output lines (referred to as GPIO), it usually can only support fewer buttons and LED light-emitting tubes, and the utilization rate of GPIO is low. For example, a microcontroller MCU connected with 3 GPIOs can usually only detect 2-3 buttons and drive 2-3 LED light-emitting tubes, such as figure 1 As shown, the 3 GPIOs are independent, and 1 GPIO is connected to 1 key detection circuit and 1 display driver circuit. When the circuit system is relatively complex and more buttons and light-emitting tubes need to be expanded, more GPIOs need to be expanded correspondingly, and the cost is higher. Contents of the inve...

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): G01R31/327G09G5/00G05B19/04
Inventor 何前凯谢波
Owner MIDEA GRP CO LTD
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