CN219936656U

CN219936656U - IO multiplexing circuit capable of eliminating ghosts

Info

Publication number: CN219936656U
Application number: CN202321688787.6U
Authority: CN
Inventors: 林云中; 朱斌; 李林辉; 高学宾
Original assignee: Foshan Runan Photoelectric Technology Co ltd
Current assignee: Foshan Runan Photoelectric Technology Co ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-10-31
Anticipated expiration: 2033-06-29

Abstract

The utility model relates to an IO multiplexing circuit capable of eliminating ghosts, which comprises a plurality of OLED Segment groups and an MCU chip, wherein each OLED Segment group at least comprises diodes 1A, 1B and S2, each MCU chip at least comprises a connecting pin1, a pin2 and a pin3, a first control module used for enabling the connecting pin2 to generate a high level, the connecting pin1 to generate a low level and the connecting pin3 to be in a high resistance state, a second control module used for enabling the connecting pin3 to generate a high level, the connecting pin2 to generate a low level and the connecting pin1 to be in a high resistance state and a third control module used for enabling the connecting pin3 to generate a low level are arranged in the MCU chip, the first control module, the second control module and the third control module are sequentially and circularly operated according to fixed frequencies, the effect of eliminating ghosts is achieved, and the display effect of a display screen is improved.

Description

IO multiplexing circuit capable of eliminating ghosts

Technical Field

The utility model relates to the technical field of OLED (organic light emitting diode), in particular to an IO multiplexing circuit capable of eliminating ghosts.

Background

The various display screens of the electrical system are auxiliary facilities indispensable to all distribution devices and electric facility control systems. Is an essential component for all power supply and distribution equipment, electric control equipment, electric equipment and the like. It acts on power supply display, line or equipment working state display, power supply equipment fault phenomenon display, working facility process position display, etc. The display screen is a signal display which shows the working state of the electric system of all electric facilities to be perceived by related personnel outside.

The display screen generally comprises a plurality of OLED Segment groups, each OLED Segment group comprises a plurality of light emitting diodes, the control chip is realized by controlling the level of the output pin to be high and low and the resistance state to be quickly changed, as shown in fig. 1, a single OLED Segment group comprises light emitting diodes 1A, 1B and S2, when the light emitting diodes 1A and 1B need to be lightened, the control chip enables pin2 to generate high level, pin1 to generate low level and pin3 to be in high resistance state, and the light emitting diode 1A is lightened; then pin2 generates a low level, pin3 generates a high level and pin1 is in a high resistance state, the light emitting diode 1B is lighted, and then the above control process is repeated at a high frequency.

However, when the light emitting diode 1B is turned on, pin3 generates a high level due to the need for use and cannot be set to a high resistance state, and the light emitting diode S2 is turned on in the forward direction from pin3 to pin1, although pin1 is in a high resistance state, in theory, no current flows through pin1 in infinite resistance, but in practical application, a small current flows through the light emitting diode S2, so that a ghost phenomenon occurs, that is, when the light emitting diode 1B is turned on, the light emitting diode S2 emits slightly a little bright light, and the display effect of the display screen is affected.

Therefore, further improvements are needed.

Disclosure of Invention

The present utility model aims to overcome the disadvantages of the prior art, and provides an IO multiplexing circuit capable of eliminating ghosts, which aims to solve at least one of the technical problems in the prior art to a certain extent.

The purpose of the utility model is realized in the following way:

the IO multiplexing circuit comprises a plurality of OLED Segment groups and an MCU chip, wherein each OLED Segment group at least comprises diodes 1A, 1B and S2, each MCU chip is provided with at least connecting pins pin1, pin2 and pin3, each connecting pin1 is electrically connected with the cathode of the diode 1A and the cathode of the diode S2, each connecting pin2 is electrically connected with the anode of the diode 1A and the cathode of the diode 1B, and each connecting pin3 is electrically connected with the anode of the diode 1B and the anode of the diode S2.

The MCU chip is internally provided with a first control module for enabling the connecting pin2 to generate a high level, the connecting pin1 to generate a low level and the connecting pin3 to be in a high resistance state, a second control module for enabling the connecting pin3 to generate a high level, the connecting pin2 to generate a low level and the connecting pin1 to be in a high resistance state, and a third control module for enabling the connecting pin3 to generate a low level, wherein the first control module, the second control module and the third control module are sequentially and circularly operated according to fixed frequency.

The frequency of the sequential cyclic operation of the first control module, the second control module and the third control module is 150HZ.

The beneficial effects of the utility model are as follows:

the third control module of the MCU chip can avoid the voltage difference between the connecting pin1 and the connecting pin3 after the light-emitting diode 1B is lightened, and prevent the current between the pin1 and the connecting pin3 from passing through the light-emitting diode S2, thereby having the effect of eliminating ghosts and improving the display effect of the display screen.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, or may be learned by practice of the utility model.

Drawings

FIG. 1 is a schematic circuit diagram of a single OLED Segment group according to the prior art.

Fig. 2 is a schematic circuit diagram of an embodiment of the present utility model.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

Referring to fig. 2, the IO multiplexing circuit capable of eliminating ghosts comprises a plurality of OLED Segment groups and an MCU chip, wherein each OLED Segment group at least comprises diodes 1A, 1B and S2, each MCU chip at least has connection pins pin1, pin2 and pin3, the connection pins pin1 are respectively electrically connected with the cathode of the diode 1A and the cathode of the diode S2, the connection pins pin2 are respectively electrically connected with the anode of the diode 1A and the cathode of the diode 1B, and the connection pins pin3 are respectively electrically connected with the anode of the diode 1B and the anode of the diode S2.

In this embodiment, the MCU chip may be preferably a chip device with a model number of STC15W408 AS.

Further, the frequency of the first control module, the second control module and the third control module which are sequentially and circularly operated is 150HZ, when the light emitting diodes 1A and 1B are required to be simultaneously lightened, the MCU chip can sequentially and rapidly and circularly operate the first control module, the second control module and the third control module through rapid scanning, so that the light emitting diodes 1A and 1B can be sequentially and rapidly and circularly lightened, and the lightening speed is relatively high, so that the effect seen by naked eyes is that the light emitting diodes 1A and 1B are simultaneously lightened.

The above examples are only preferred embodiments of the utility model, and other embodiments of the utility model are possible. Equivalent modifications and substitutions can be made by those skilled in the art without departing from the spirit of the utility model, and these equivalent modifications or substitutions are intended to be included within the scope of the present utility model as set forth in the following claims.

Claims

1. The IO multiplexing circuit capable of eliminating ghosts is characterized by comprising a plurality of OLED Segment groups and an MCU chip, wherein each OLED Segment group at least comprises diodes 1A, 1B and S2, each MCU chip is provided with at least connecting pins pin1, pin2 and pin3, each connecting pin1 is electrically connected with the cathode of the diode 1A and the cathode of the diode S2, each connecting pin2 is electrically connected with the anode of the diode 1A and the cathode of the diode 1B, and each connecting pin3 is electrically connected with the anode of the diode 1B and the anode of the diode S2;

the MCU chip is internally provided with a first control module for enabling the connecting pin2 to generate high level, the connecting pin1 to generate low level and the connecting pin3 to be in a high-resistance state, a second control module for enabling the connecting pin3 to generate high level, the connecting pin2 to generate low level and the connecting pin1 to be in a high-resistance state and a third control module for enabling the connecting pin3 to generate low level, wherein the first control module, the second control module and the third control module are sequentially and circularly operated according to fixed frequency.

2. The IO multiplexing circuit of claim 1, wherein the frequency of the sequential loop operation of the first control module, the second control module, and the third control module is 150HZ.