Elevator display system adopting single processor to control double display screens
By controlling the elevator display system with dual displays using a single processor, combined with a backlight control module and a display control module, the problems of large space occupation and complex circuits in the existing technology are solved, and the stability and reliability of the elevator display are improved.
Patent Information
- Application Number
- CN202422832285.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-20
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-20
AI Technical Summary
In existing elevator systems, dual-display control requires two single-chip microcomputers, which takes up a lot of space and complicates the wiring. In addition, the LCD backlight control lacks a power detection function, affecting reliability.
A single processor is used to control dual display screens, which are connected to the display control board through a central control module. The backlight control module and display control module are combined, and integrated circuits and voltage stabilization circuits are used to optimize the backlight control circuit to ensure stable current and voltage supply.
It achieves stable backlight control of dual display screens, reduces line complexity, and improves elevator reliability and display screen stability.
Smart Images
Figure CN223362807U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of elevator engineering, in particular to an elevator display system which adopts a single processor to control dual display screens. Background Art
[0002] Most existing elevators use a single display screen, with some featuring dual displays. Each display screen is controlled by a single-chip microcomputer. This results in the two control boards taking up a lot of space. Furthermore, the two control boards communicate using cables, resulting in a large number of internal wiring, which affects the reliability of the elevator. Furthermore, existing LCD display control boards only control the LCD backlight by turning the power on and off, but lack a robust power detection function, further impacting the reliability of the LCD screen. Utility Model Content
[0003] In order to overcome the above-mentioned shortcomings, the utility model provides an elevator display system which adopts a single processor to control dual display screens.
[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:
[0005] An elevator display system using a single processor to control dual display screens includes a central control module, a first display control panel, and a second display control panel. The central control module is electrically connected to the first display control panel and the second display control panel, respectively. The first display control panel is provided with a first backlight control module and a first display control module, and the second display control panel is provided with a second backlight control module and a second display control module.
[0006] The first backlight control module and the second backlight control module are both provided with a backlight control circuit, which includes a first integrated circuit, a second integrated circuit, a voltage stabilizing circuit, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a fifth capacitor, a sixth capacitor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a second diode and a third diode. The model of the first integrated circuit is M ST719, the model of the second integrated circuit is OZ9926A, the fifty-fifth terminal of the first integrated circuit is electrically connected to the base of the third transistor through the seventh resistor, the emitter of the third transistor is grounded, the collector of the third transistor is externally connected to a 5V DC voltage power supply through the sixth resistor, the collector of the third transistor is electrically connected to the nineteenth terminal of the second integrated circuit through the fifth resistor, the fifty-fourth terminal of the first integrated circuit is electrically connected to the base of the fourth transistor through the tenth resistor, the emitter of the fourth transistor is grounded, the collector of the fourth transistor is externally connected to a 5V DC voltage power supply through the ninth resistor, and the collector of the fourth transistor is externally connected to the eighth resistor. The resistor is electrically connected to the eleventh terminal of the second integrated circuit, the eighty-third terminal of the first integrated circuit is electrically connected to the base of the fifth transistor through the eleventh resistor, the emitter of the fifth transistor and the emitter of the sixth transistor are both grounded, the collector of the fifth transistor is externally connected to a 5V DC voltage power supply through the twelfth resistor, the collector of the fifth transistor is electrically connected to the base of the sixth transistor through the thirteenth resistor, the collector of the sixth transistor is externally connected to the 5V DC voltage power supply through the fourteenth resistor, the collector of the sixth transistor is externally connected to the 5V DC voltage power supply through the fifteenth resistor, the collector of the sixth transistor is electrically connected to the signal input terminal of the MCU in the central control module through the fifteenth resistor, and the seventy terminal of the first integrated circuit is electrically connected to the base of the fifth transistor through the eleventh resistor. The first integrated circuit is electrically connected to the collector of the seventh transistor through a sixteenth resistor, the collector of the seventh transistor is grounded through a seventeenth resistor, the emitter of the seventh transistor is grounded through a fifth capacitor, the emitter of the seventh transistor is electrically connected to the cathode of the second diode, the anode of the second diode is externally connected to a 3.3V DC voltage power supply, the cathode of the third diode is externally connected to a 3.3V DC voltage power supply, the nineteenth resistor is connected in parallel with the third diode, the anode of the third diode is grounded through a sixth capacitor, the anode of the third diode is electrically connected to the base of the seventh transistor through an eighteenth resistor, and the eighty-second terminal of the first integrated circuit is electrically connected to the output terminal of the voltage stabilizing circuit.
[0007] Preferably, the voltage stabilizing circuit includes a voltage regulator tube, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a fourth resistor and a first diode. The model of the voltage regulator tube is 78L05. The ground terminal of the voltage regulator tube is electrically connected to the base of the first transistor. The input terminal of the voltage regulator tube is grounded through the first capacitor and the second capacitor respectively. The input terminal of the voltage regulator tube is electrically connected to the collector of the first transistor. The output terminal of the voltage regulator tube is grounded through the third capacitor and the fourth capacitor respectively. The output terminal of the voltage regulator tube is electrically connected to the emitter of the first transistor. The anode of the first diode is electrically connected to the output terminal of the voltage regulator tube. The cathode of the first diode is electrically connected to the input terminal of the voltage regulator tube. The output terminal of the voltage regulator tube is connected to the collector of the first transistor through the first The resistor is electrically connected to the collector of the second triode, the emitter of the second triode is grounded, the collector of the second triode is externally connected to a 5V DC voltage power supply via the second resistor, the base of the second triode is electrically connected to the 82nd terminal of the first integrated circuit via the third resistor, and the 82nd terminal of the first integrated circuit is externally connected to a 3.3V DC voltage power supply via the fourth resistor. Before passing through the voltage regulator, the power supply voltage is filtered and energy stored by the first capacitor and the second capacitor, and then enters the voltage regulator for voltage stabilization output, and is then filtered and energy stored by the third capacitor and the fourth capacitor. At the same time, the first diode can provide protection against reverse spike voltage, and the addition of the first triode can expand the output current of the voltage regulator, so that the backlight control circuit can ensure sufficient operating current.
[0008] Preferably, the central control module is electrically connected to a working power supply module.
[0009] Preferably, the seventh transistor is a PNP transistor.
[0010] Preferably, the central control module is a central control circuit mainly composed of STM32FRBT6. STM32F has excellent peripherals and low power consumption and low voltage operation to achieve high performance. At the same time, it also achieves high integration at an acceptable price, using a simple architecture and easy-to-use tools.
[0011] The beneficial effects of the utility model are as follows: in the elevator display system using a single processor to control dual display screens, the fifty-fourth terminal of the first integrated circuit in the backlight control circuit controls the brightness of the backlight through the driving circuit mainly composed of the fourth transistor, and at the same time, the first integrated circuit feeds back voltage to the MCU in the central control module, so that the brightness of the backlight of the liquid crystal display screen is stable; moreover, the voltage stabilizing circuit increases the stable operating voltage of the circuit mainly composed of the first integrated circuit and provides a stable operating current, so that the backlight brightness is stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be described by way of examples with reference to the accompanying drawings, in which:
[0013] Figure 1 It is a structural diagram of the utility model;
[0014] Figure 2 It is a schematic diagram of the internal structure of the utility model. DETAILED DESCRIPTION
[0015] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.
[0016] like Figure 1 and Figure 2 As shown, an elevator display system using a single processor to control dual display screens includes a central control module, a first display control panel, and a second display control panel. The central control module is electrically connected to the first and second display control panels. The first display control panel includes a first backlight control module and a first display control module, while the second display control panel includes a second backlight control module and a second display control module.
[0017] The first backlight control module and the second backlight control module are both provided with a backlight control circuit, which includes a first integrated circuit U1, a second integrated circuit U2, a voltage stabilizing circuit, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, a fifth capacitor C5, a sixth capacitor C6, a third transistor Q3, a fourth transistor Q4, a fifth transistor Q5, a sixth transistor Q6, a seventh transistor Q7, a second diode D2 and a third The diode D3, the model of the first integrated circuit U1 is MST719, the model of the second integrated circuit U2 is OZ9926A, the fifty-fifth terminal of the first integrated circuit U1 is electrically connected to the base of the third transistor Q3 through the seventh resistor R7, the emitter of the third transistor Q3 is grounded, the collector of the third transistor Q3 is externally connected to a 5V DC voltage power supply through the sixth resistor R6, the collector of the third transistor Q3 is electrically connected to the nineteenth terminal of the second integrated circuit U2 through the fifth resistor R5, the fifty-fourth terminal of the first integrated circuit U1 is electrically connected to the base of the fourth transistor Q4 through the tenth resistor R10, the emitter of the fourth transistor Q4 is grounded, the collector of the fourth transistor Q4 is externally connected to a 5V DC voltage power supply through the ninth resistor R9, and the fourth transistor The collector of Q4 is electrically connected to the eleventh terminal of the second integrated circuit U2 through the eighth resistor R8, the eighty-third terminal of the first integrated circuit U1 is electrically connected to the base of the fifth transistor Q5 through the eleventh resistor R11, the emitter of the fifth transistor Q5 and the emitter of the sixth transistor Q6 are both grounded, the collector of the fifth transistor Q5 is externally connected to a 5V DC voltage power supply through the twelfth resistor R12, the collector of the fifth transistor Q5 is electrically connected to the base of the sixth transistor Q6 through the thirteenth resistor R13, the collector of the sixth transistor Q6 is externally connected to a 5V DC voltage power supply through the fourteenth resistor R14, the collector of the sixth transistor Q6 is electrically connected to the signal input terminal of the MCU in the central control module through the fifteenth resistor R15, and the first integrated circuit U1 The seventieth terminal is electrically connected to the collector of the seventh transistor Q7 through the sixteenth resistor R16, the collector of the seventh transistor Q7 is grounded through the seventeenth resistor R17, the emitter of the seventh transistor Q7 is grounded through the fifth capacitor C5, the emitter of the seventh transistor Q7 is electrically connected to the cathode of the second diode D2, the anode of the second diode D2 is externally connected to a 3.3V DC voltage power supply, and the cathode of the third diode D3 is externally connected to a 3.3V DC voltage power supply. The nineteenth resistor R19 is connected in parallel with the third diode D3, the anode of the third diode D3 is grounded through the sixth capacitor C6, and the anode of the third diode D3 is electrically connected to the base of the seventh transistor Q7 through the eighteenth resistor R18. The eighty-second terminal of the first integrated circuit U1 is electrically connected to the output terminal of the voltage stabilizing circuit.
[0018] Specifically, the voltage stabilizing circuit includes a voltage stabilizing tube U3, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first transistor Q1, a second transistor Q2, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a first diode D1. The model of the voltage stabilizing tube U3 is 78L05. The ground terminal of the voltage stabilizing tube U3 is electrically connected to the base of the first transistor Q1. The input terminal of the voltage stabilizing tube U3 is grounded through the first capacitor C1 and the second capacitor C2 respectively. The input terminal of the voltage stabilizing tube U3 is electrically connected to the collector of the first transistor Q1. The output terminal of the voltage stabilizing tube U3 is grounded through the third capacitor C3 and the fourth capacitor C4 respectively. The output terminal of the voltage stabilizing tube U3 is electrically connected to the emitter of the first transistor Q1. The anode of the first diode D1 is electrically connected to the output terminal of the voltage stabilizing tube U3. The cathode of the first diode D1 is electrically connected to the input terminal of the voltage stabilizing tube U3. The output end of U3 is electrically connected to the collector of the second transistor Q2 through the first resistor R1. The emitter of the second transistor Q2 is grounded. The collector of the second transistor Q2 is externally connected to a 5V DC voltage power supply through the second resistor R2. The base of the second transistor Q2 is electrically connected to the 82nd terminal of the first integrated circuit U1 through the third resistor R3. The 82nd terminal of the first integrated circuit U1 is externally connected to a 3.3V DC voltage power supply through the fourth resistor R4. Before passing through the voltage regulator U3, the power supply voltage is filtered and energy stored by the first capacitor C1 and the second capacitor C2. It then enters the voltage regulator U3 for regulated output and is then filtered and energy stored by the third capacitor C3 and the fourth capacitor C4. At the same time, the first diode D1 can provide protection against reverse spike voltage. The addition of the first transistor Q1 can expand the output current of the voltage regulator U3, so that the backlight control circuit can ensure sufficient operating current.
[0019] Specifically, the central control module is electrically connected to a working power supply module.
[0020] Specifically, the seventh transistor Q7 is a PNP transistor.
[0021] Specifically, the central control module is a central control circuit mainly composed of STM32FRBT6. STM32F has excellent peripherals and low power consumption and low voltage operation to achieve high performance. At the same time, it also achieves high integration at an acceptable price, using a simple architecture and easy-to-use tools.
[0022] The above description is based on the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the content of the specification, but must be determined according to the scope of the claims.
Claims
1. An elevator display system using a single processor to control dual display screens, characterized by: It includes a central control module, a first display control board and a second display control board, wherein the central control module is electrically connected to the first display control board and the second display control board respectively; The first display control panel is provided with a first backlight control module and a first display control module, and the second display control panel is provided with a second backlight control module and a second display control module; The first backlight control module and the second backlight control module are both provided with a backlight control circuit, which includes a first integrated circuit, a second integrated circuit, a voltage stabilizing circuit, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a fifth capacitor, a sixth capacitor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, a second diode and a third diode. The model of the first integrated circuit is M ST719, the model of the second integrated circuit is OZ9926A, the fifty-fifth terminal of the first integrated circuit is electrically connected to the base of the third transistor through the seventh resistor, the emitter of the third transistor is grounded, the collector of the third transistor is externally connected to a 5V DC voltage power supply through the sixth resistor, the collector of the third transistor is electrically connected to the nineteenth terminal of the second integrated circuit through the fifth resistor, the fifty-fourth terminal of the first integrated circuit is electrically connected to the base of the fourth transistor through the tenth resistor, the emitter of the fourth transistor is grounded, the collector of the fourth transistor is externally connected to a 5V DC voltage power supply through the ninth resistor, and the collector of the fourth transistor is externally connected to the eighth resistor. The resistor is electrically connected to the eleventh terminal of the second integrated circuit, the eighty-third terminal of the first integrated circuit is electrically connected to the base of the fifth transistor through the eleventh resistor, the emitter of the fifth transistor and the emitter of the sixth transistor are both grounded, the collector of the fifth transistor is externally connected to a 5V DC voltage power supply through the twelfth resistor, the collector of the fifth transistor is electrically connected to the base of the sixth transistor through the thirteenth resistor, the collector of the sixth transistor is externally connected to the 5V DC voltage power supply through the fourteenth resistor, the collector of the sixth transistor is externally connected to the 5V DC voltage power supply through the fifteenth resistor, the collector of the sixth transistor is electrically connected to the signal input terminal of the MCU in the central control module through the fifteenth resistor, and the seventy terminal of the first integrated circuit is electrically connected to the base of the fifth transistor through the eleventh resistor. The first integrated circuit is electrically connected to the collector of the seventh transistor through a sixteenth resistor, the collector of the seventh transistor is grounded through a seventeenth resistor, the emitter of the seventh transistor is grounded through a fifth capacitor, the emitter of the seventh transistor is electrically connected to the cathode of the second diode, the anode of the second diode is externally connected to a 3.3V DC voltage power supply, the cathode of the third diode is externally connected to a 3.3V DC voltage power supply, the nineteenth resistor is connected in parallel with the third diode, the anode of the third diode is grounded through a sixth capacitor, the anode of the third diode is electrically connected to the base of the seventh transistor through an eighteenth resistor, and the eighty-second terminal of the first integrated circuit is electrically connected to the output terminal of the voltage stabilizing circuit.
2. The elevator display system using a single processor to control dual display screens according to claim 1, characterized in that: The voltage stabilizing circuit includes a voltage stabilizing tube, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor, a fourth resistor and a first diode. The voltage stabilizing tube is of model 78L05. The ground terminal of the voltage stabilizing tube is electrically connected to the base of the first transistor. The input terminal of the voltage stabilizing tube is grounded through the first capacitor and the second capacitor respectively. The input terminal of the voltage stabilizing tube is electrically connected to the collector of the first transistor. The output terminal of the voltage stabilizing tube is grounded through the third capacitor and the fourth capacitor respectively. The output terminal of the voltage stabilizing tube is electrically connected to the collector of the first transistor. The emitter of the first transistor is electrically connected, the anode of the first diode is electrically connected to the output end of the voltage regulator, the cathode of the first diode is electrically connected to the input end of the voltage regulator, the output end of the voltage regulator is electrically connected to the collector of the second transistor through the first resistor, the emitter of the second transistor is grounded, the collector of the second transistor is externally connected to a 5V DC voltage power supply through the second resistor, the base of the second transistor is electrically connected to the 82nd terminal of the first integrated circuit through the third resistor, and the 82nd terminal of the first integrated circuit is externally connected to a 3.3V DC voltage power supply through the fourth resistor.
3. The elevator display system using a single processor to control dual display screens according to claim 1, characterized in that: The central control module is electrically connected to a working power supply module.
4. The elevator display system using a single processor to control dual display screens according to claim 1, characterized in that: The seventh transistor is a PNP transistor.
5. The elevator display system using a single processor to control dual display screens according to claim 1, characterized in that: The central control module is a central control circuit mainly composed of STM32FRBT6.