LED digital tube display and button control chip using time division multiplexing technology

A LED digital tube and time-division multiplexing technology, which is applied to static indicators, instruments, etc., can solve the problems of unfavorable anti-interference performance of key control, increase of control chip wafer area, faint brightness of luminous display segments, etc., to solve the problem of faint brightness of corresponding luminous display segments , optimize cost, optimize the effect of quantity

Active Publication Date: 2016-07-27
FUZHOU FUDA HISI MICROELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too many output pins will increase the wafer area of ​​the control chip and increase the packaging cost
Most of the display driver and key control chips of traditional LED dig...

Method used

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  • LED digital tube display and button control chip using time division multiplexing technology
  • LED digital tube display and button control chip using time division multiplexing technology
  • LED digital tube display and button control chip using time division multiplexing technology

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the specific embodiments of the accompanying drawings. (but not limitation of the invention).

[0029] Such as figure 1 As shown, it is the wiring diagram of the traditional common cathode and common anode digital tubes or LED light-emitting tube array, and it is a 1-digit * 8-segment display. A total of N+P=1+8=9 control pins are required, and figure 2 It is the wiring diagram of the nixie tube or LED light-emitting array used in the example of the present invention. It can be seen that the same 1-digit 8-segment display control only needs N+V=1+4=5 control pins. It can save 4 control pins of the upper computer control chip, and also save the same number of digital tube packaging pins, saving system costs in all directions.

[0030] image 3 It is a block diagram of the internal structure of the chip of the present invention. The chip of the present invention is provided with a two-wire seri...

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Abstract

The invention relates to an LED digital tube display and button control chip adopting time-division multiplexing technology. After the LED digital tube display and button control chip adopting time-division multiplexing technology is combined and connected to the LED digital tube or LED light-emitting tube array, the cost of the traditional LED digital tube display drive control system is optimized, and the anti-interference of the key control is optimized at the same time. Performance and the problem of the corresponding light-emitting segment displaying slightly bright during the button action; the present invention adopts time-division multiplexing technology, and after the digital tube or LED light-emitting tube array is combined and connected with common cathode and common anode, it is time-divisionally controlled. At the same time, each display output lead The pins are time-division multiplexed as button scanning output to realize the combination button control function of (N+V)*M, (M is the number of combination button input pins); the invention adopts independent button input pins, abandoning the traditional DIG pin When the pin is multiplexed as a key input, in principle, there is an unavoidable high-impedance state or the problem that the corresponding luminous display segment is slightly bright when the key is pressed, so as to improve the anti-interference performance of the key.

Description

technical field [0001] The invention relates to an LED digital tube display and button control chip adopting time-division multiplexing technology. Background technique [0002] Traditional nixie tube or LED light-emitting tube array display driver, due to the constraints of traditional nixie tube packaging technology, requires a large driver pin interface for control. Taking the N-bit P-segment digital tube or N*P light-emitting tube display array driven by the present invention as an example, at least N+P control pins are required. Too many output pins will increase the wafer area of ​​the control chip and increase the packaging cost. Most of the display driver and key control chips of traditional LED digital tubes use DIG pins as key input multiplexing. , there will be a problem that the corresponding light-emitting display segment of the button action interval is slightly bright. Therefore, considering the above factors, it is necessary to carry out some reform and in...

Claims

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Application Information

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IPC IPC(8): G09G3/14
Inventor 刘伟城
Owner FUZHOU FUDA HISI MICROELECTRONICS
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