CN213183537U

CN213183537U - Display panel with low power consumption

Info

Publication number: CN213183537U
Application number: CN202022058100.3U
Authority: CN
Inventors: 王祖强; 何义植
Original assignee: Zhongshan Jingti Electronic Technology Co ltd
Current assignee: Guangdong Jingti Electronic Technology Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-05-11
Anticipated expiration: 2030-09-18

Abstract

The utility model belongs to the technical field of the electronic circuit technique and specifically relates to a display panel of low-power consumption, a display panel of low-power consumption include light intensity detection circuit, control circuit, dimmer circuit, LED display circuit. The utility model discloses a light intensity detection circuit detects the illumination intensity of display panel surrounding environment, realizes LED display panel's illuminance regulation through control circuit and dimming circuit control LED display circuit break-make time proportion, makes LED show illuminance and surrounding environment phase-match, improves LED display panel's display effect.

Description

Display panel with low power consumption

Technical Field

The utility model belongs to the technical field of the electronic circuit technique and specifically relates to a display panel of low-power consumption.

Background

The LED display has the advantages of energy conservation, environmental protection, high corresponding speed and the like, and along with the rapid development of the LED technology, the LED display panel is used in more and more places to display graphs and Chinese characters. However, the existing LED display panel cannot sense the light intensity of the surrounding environment to automatically adjust, a large amount of power is wasted, the LED display is too bright when the brightness of the LED display panel is constant and the LED display is too bright in the dark in the cloudy environment at night, and the display effect of the LED display panel is affected by the dim of the LED display in the daytime with strong illumination.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problem that exists among the background art, the utility model provides a according to the low-power consumption display panel of environment illumination intensity automatically regulated LED display element luminance, reduced the display panel consumption, improved display panel's display effect, make LED display panel all can normally show under the arbitrary condition.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the method comprises the following steps: the LED display device comprises a light intensity detection circuit, a control circuit, a dimming circuit and an LED display circuit; the light intensity detection circuit is used for acquiring an external light intensity signal, converting the light intensity signal into an electric signal and then sending the electric signal to the control circuit; the control circuit generates a signal corresponding to the pulse width of the LED illumination according to the feedback signal of the light intensity detection circuit and sends the signal to the dimming circuit; the dimming circuit controls the on-off time proportion of the LED display circuit according to the LED illumination pulse width signal sent by the control circuit; the LED display circuit comprises a plurality of LED display units, and the LED display units are used for switching on and off the LED lamps according to the on-off time proportion, so that the LED brightness can be adjusted from 0-100% in multiple stages.

Further, the light intensity detecting circuit comprises: a TSL2561 chip, resistors R1 and R2 and a capacitor C1; the VCC pin of the TSL2561 chip is connected with 3.3V input voltage and is connected to the ground through a capacitor C6; the ADDR _ SEL pin and the GND pin of the TSL2561 chip are grounded; the SDA pin and the SCL pin of the TSL2561 chip are respectively connected to the 3.3V input voltage through the R1 resistor and the R2 resistor, and the SDA pin, the SCL pin and the INT pin of the TSL2561 chip are used as output ends of the light intensity detection circuit.

Furthermore, the control circuit comprises an STC89C52RC chip, a crystal oscillator circuit and a reset circuit, wherein a pin P1.0, a pin P1.1 and a pin P1.2 of the STC89C52RC chip are used as input ends of the control circuit and are connected with the output end of the light intensity detection circuit; pins AD 0-AD 7 of the STC89C52RC chip are output ends of the control circuit and send pulse width signals to the dimming circuit; the XTAL1 and XTAL2 pins of the SCT89C52RC are connected with a crystal oscillator circuit, the crystal oscillator Y1 in the crystal oscillator circuit is a 12MHz crystal oscillator, and the RST pin of the SCT89C52RC is connected with a reset circuit.

Furthermore, the dimming circuit comprises a plurality of RX5801 chips and a ground resistor, wherein a VDD pin of each RX5801 chip is connected with 5V input voltage, a GND pin and a Rext pin of each RX5801 chip are grounded, the Rext pin is connected with the ground resistor in series, an OE pin of each RX5801 chip is connected with the output end of the control circuit and used as the input end of the dimming circuit, a pulse width signal sent by the control circuit is received, and an OUT pin of each RX5801 chip is connected with the LED display circuit and used as the output end of the dimming circuit to control the on-off of the LED display circuit.

Furthermore, the LED display circuit is formed by connecting a plurality of LED display units in series, and the input end of each LED display unit is connected with the input power VCC through a divider resistor.

The utility model discloses beneficial effect: the utility model discloses a light intensity detection circuit detects the illumination intensity of display panel surrounding environment, realizes LED display panel's illuminance regulation through control circuit and dimming circuit control LED display circuit break-make time proportion, reduces the display panel consumption, makes LED show illuminance and surrounding environment phase-match, improves LED display panel's display effect.

Drawings

Fig. 1 is an overall topology diagram of the present invention;

FIG. 2 is a circuit diagram of a light intensity detecting circuit;

FIG. 3 is a circuit diagram of a control circuit;

fig. 4 is a circuit diagram of the dimming circuit and the LED display circuit.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will explain in detail a preferred embodiment of the present invention with reference to the accompanying drawings to facilitate understanding of the skilled person.

Fig. 1 is a schematic diagram of the display panel of the present invention, and the display panel with low power consumption of the present invention includes a light intensity detection circuit, a control circuit, a dimming circuit, and an LED display circuit; the light intensity detection circuit is used for acquiring an external light intensity signal, converting the light intensity signal into an electric signal and then sending the electric signal to the control circuit; the control circuit generates a signal corresponding to the pulse width of the LED illumination according to the feedback signal of the light intensity detection circuit and sends the signal to the dimming circuit; the dimming circuit controls the on-off time proportion of the LED display circuit according to the LED illumination pulse width signal sent by the control circuit; the LED display circuit comprises a plurality of LED display units, and the LED display units are used for switching on and off the LED lamps according to the on-off time proportion, so that the LED brightness can be adjusted from 0-100% in multiple stages.

FIG. 2 is a circuit diagram of a light intensity detection circuit, the light intensity detection circuit is a TSL2561 chip, a pin 1 of a D1 chip is connected with a 3.3V power supply, the power supply is connected to the ground through a 0.1uF capacitor C1, a pin 2 and a pin 3 are grounded,

pins

5 and 6 are connected with a 10 kiloohm resistor R1 and a pin R2 to 3.3V power supply and are connected to a pin 2 and a pin 3 of a control circuit D2, and a pin 4 of a D1 is directly connected to a pin 1 of a control circuit D2.

Fig. 3 is a circuit diagram of a control circuit, the control circuit selects an STC89C52RC single chip processor, the control circuit is a minimum control circuit system formed by processing a crystal oscillator circuit, a reset circuit and an STC89C52RC single chip processor, a 12mhz y1 crystal oscillator is arranged in the crystal oscillator circuit, the crystal oscillator circuit is connected with

pins

18 and 19 of D2, the reset circuit is used for resetting the control circuit D2, the reset circuit is connected with pin 9 of D2, pin 20 of D2 is grounded, pin 40 is connected with a 5V power supply, pins 32 to 39 of D2 are output ends, pins 32 to 39 are connected with pins 1 of dimming circuits U1 to U8, and pulse width signals are sent to U1 to U8, and the D2 is used for outputting corresponding pulse width signals after processing according to light intensity signals detected by a light intensity detection circuit.

Fig. 4 is a circuit diagram of a dimming circuit and an LED display circuit, in this embodiment, the dimming circuit includes 8 RX5801 chips, the RX5801 chip is an LED constant current driving chip, and it is described by taking U1 as an example, pin 1 of U1 is connected to pin 39 of D2, D2 outputs a light intensity pulse width signal to U1, pin 2 of U1 is connected to a 5V power supply,

pins

3 and 4 of U1 are grounded, pin 4 is grounded through a ground resistor, pin 5 of U1 is connected to an LED display circuit as an output terminal, U1 controls an on-off time ratio of the LED display circuit at a lower end according to the light intensity pulse width signal, a connection manner of U2 to U8 is consistent with U1, and the RX5801 chip sets an on-off switching frequency to be 200Hz or more than a visual frequency limit, and a flicker phenomenon occurring when switching is avoided by using a visual residual effect of human eyes.

The LED display circuit is formed by connecting a plurality of LED display units in series, and the input end of each LED display unit is connected with the VCC (voltage VCC) through a divider resistor. The LED display circuit adjusts the illumination of the LED unit in the circuit in a mode of adjusting the on-off time ratio, when the illumination intensity is high, the off time of the LED display unit is longer than the on time, the energy consumption is saved, the illumination of the LED display circuit is correspondingly changed after the external light intensity is changed, the LED display illumination is matched with the surrounding environment, and the display effect of the LED display panel is improved.

The utility model discloses a working process: the circuit is powered on, the singlechip processor D2 is initialized at the power-on initial stage, the light intensity detection circuit collects the light intensity signals of the environment and sends the light intensity signals to the singlechip processor D2 of the control circuit, the D2 outputs pulse width signals of the corresponding light intensity signals, and the dimming circuits U1-U8 adjust the on-off time ratio of the LED display circuit according to the pulse width signals to adjust the illumination of the LED units. When the external illumination intensity is strong, the LED display unit is turned off for a time longer than the on-time, and the LED brightness is reduced.

Finally, it is noted that the above preferred embodiments are only intended to illustrate the technical solutions of the present invention, and not to limit, although the present invention has been described in detail through the above preferred embodiments, it should be understood by those skilled in the art that various changes in form and detail may be made thereto without departing from the scope of the present invention.

Claims

1. A display panel with low power consumption, comprising: the LED display device comprises a light intensity detection circuit, a control circuit, a dimming circuit and an LED display circuit; the light intensity detection circuit is used for acquiring an external light intensity signal, converting the light intensity signal into an electric signal and then sending the electric signal to the control circuit; the control circuit generates a signal corresponding to the pulse width of the LED illumination according to the feedback signal of the light intensity detection circuit and sends the signal to the dimming circuit; the dimming circuit controls the on-off time proportion of the LED display circuit according to the LED illumination pulse width signal sent by the control circuit; the LED display circuit is used for switching on and off the LED lamp in proportion to the switching-on and switching-off time, so that the LED brightness can be adjusted from 0 to 100 percent in multiple stages.

2. The display panel with low power consumption as claimed in claim 1, wherein: the light intensity detection circuit comprises: a TSL2561 chip, resistors R1 and R2 and a capacitor C1; the VCC pin of the TSL2561 chip is connected with 3.3V input voltage and is connected to the ground through a capacitor C6; the ADDR _ SEL pin and the GND pin of the TSL2561 chip are grounded; the SDA pin and the SCL pin of the TSL2561 chip are respectively connected to the 3.3V input voltage through the R1 resistor and the R2 resistor, and the SDA pin, the SCL pin and the INT pin of the TSL2561 chip are used as output ends of the light intensity detection circuit.

3. A low power consumption display panel according to claim 2, wherein: the control circuit comprises an STC89C52RC chip, a crystal oscillator circuit and a reset circuit, wherein a pin P1.0, a pin P1.1 and a pin P1.2 of the STC89C52RC chip are used as input ends of the control circuit and are connected with the output end of the light intensity detection circuit; pins AD 0-AD 7 of the STC89C52RC chip are output ends of the control circuit and send pulse width signals to the dimming circuit; the XTAL1 and XTAL2 pins of the SCT89C52RC are connected with a crystal oscillator circuit, the crystal oscillator Y1 in the crystal oscillator circuit is a 12MHz crystal oscillator, and the RST pin of the SCT89C52RC is connected with a reset circuit.

4. A low power consumption display panel according to claim 3, characterized in that: the dimming circuit comprises a plurality of RX5801 chips and a ground resistor, wherein a VDD pin of each RX5801 chip is connected with 5V input voltage, a GND pin and a Rext pin of each RX5801 chip are grounded, the Rext pin is connected with the ground resistor in series, an OE pin of each RX5801 chip is connected with the output end of the control circuit and used for receiving a pulse width signal sent by the control circuit, and an OUT pin of each RX5801 chip is connected with the LED display circuit and used for controlling the on-off of the LED display circuit and used for connecting the output end of the dimming circuit.

5. The display panel with low power consumption as claimed in claim 4, wherein the LED display circuit comprises a plurality of LED display units connected in series, and the input end of the LED display unit is connected to the input power VCC through a voltage dividing resistor.