COB liquid crystal display module with serial and parallel ports and Chinese character library

Abstract

The application discloses a COB liquid crystal display module with a serial and parallel port and a Chinese character library, which comprises a control module, a driving module, a display screen, an input interface module and a backlight module, the input interface module receives a backlight power signal and transmits the backlight power signal to the backlight module and the control module, the control module converts the backlight power signal into a corresponding control signal and transmits the control signal to the driving module, and the driving module controls the starting, closing and display of different brightness of the display screen according to the corresponding control signal; the driving module is used for controlling the display screen; the display screen is used for displaying subtitles; and the input interface module comprises a 20PIN serial and parallel port circuit; by adopting five NT7065 chips to replace AIP31021 (ST7921, UCI7921) chips in the prior art, the application effectively solves the problem that the production capacity of the AIP31021 (ST7921, UCI7921) chips cannot be supplied, and the cost is reduced; the market price of the NT7065 chip is far lower than that of the AIP31021 (ST7921, UCI7921) chip.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of COB liquid crystal display module, in particular to a COB liquid crystal display module with serial and parallel ports and Chinese character library. BACKGROUND

[0002] COB technology is a new LED packaging technology, unlike the traditional SMD surface-mounted packaging, it is to integrate the light emitting chip in the PCB, rather than welding on the PCB. COB effectively improves the light color of LED display screen, reduces the risk and cost.

[0003] With the increasing demand for display modules, the prior art uses ST7920 (or compatible chip AIP31020, UCI7920) master control + 2 AIP31021 (ST7921, UCI7921) sub-control to form a group, and the AIP31021 (ST7921, UCI7921) chip is insufficient in production capacity due to technical problems, which leads to the inability to mass-produce and apply. SUMMARY

[0004] The purpose of the present application is to provide a COB liquid crystal display module with serial and parallel ports and Chinese character library to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical solution: a COB liquid crystal display module with serial and parallel ports and Chinese character library, comprising a control module, a driving module, a display screen, an input interface module and a backlight module, the input interface module receives a backlight power signal and transmits it to the backlight module and the control module, the control module converts the backlight power signal into corresponding control signals and transmits them to the driving module, and the driving module controls the start, shutdown and different brightness display of the display screen according to the corresponding control signals.

[0006] The driving module is used to control the display screen.

[0007] The display screen is used to display subtitles.

[0008] The input interface module includes a 20PIN serial and parallel port circuit, which is connected in series with the CON port and the control chip, and directly connected to the serial port of the computer through the CON port.

[0009] The control module includes a main control module and a sub-control module.

[0010] Preferably, the main control module comprises an ST7920 chip, a 2 port of the ST7920 chip is connected with a 2 port of a VR joint, one end of a resistor Rl, a 2 port of a 4.9 joint, a 2 port of a 5.1 joint and a 3 interface of a parallel port Jl, a 1 port of the ST7920 chip is connected with the other end of the resistor Rl and one end of a resistor R2, a 2 port of the ST7920 chip is connected with the other end of the resistor R2 and one end of a resistor R3, a 3 port of the ST7920 chip is connected with the other end of the resistor R3 and one end of a resistor R4, a 4 port of the ST7920 chip is connected with the other end of the resistor R4 and one end of a resistor R5, the other end of the resistor R5 is grounded, a 9 port of the ST7920 chip is connected with one end of a capacitor C3 and a 20 port of the ST7920 chip respectively, a 10 port of the ST7920 chip is connected with one end of a resistor R6, a 14 port of the ST7920 chip and a 39 port of the ST7920 chip respectively, an 11 port of the ST7920 chip is connected with the other end of the resistor R6, the other end of the capacitor C3 and a 17 interface of the parallel port Jl respectively, a 17 port of the ST7920 chip is connected with a 4 interface of the parallel port Jl, an 18 port of the ST7920 chip is connected with a 5 interface of the parallel port Jl, and a 19 port of the ST7920 chip is connected with a 6 interface of the parallel port Jl.

[0011] Preferably, a 21 port of the ST7920 chip is connected with one end of a resistor R7, the other end of the resistor R7 is connected with a 22 port of the ST7920 chip, a 23 port of the ST7920 chip is connected with a 14 interface of the parallel port Jl, a 2 contact of a joint P and a 1 contact of a joint S respectively, a 24 port of the ST7920 chip is connected with a 7 interface of the parallel port Jl, a 25 port of the ST7920 chip is connected with a 8 interface of the parallel port Jl, a 26 port of the ST7920 chip is connected with a 9 interface of the parallel port Jl, a 27 port of the ST7920 chip is connected with a 10 interface of the parallel port Jl, a 28 port of the ST7920 chip is connected with a 11 interface of the parallel port Jl, a 29 port of the ST7920 chip is connected with a 12 interface of the parallel port Jl, and a 30 port of the ST7920 chip is connected with a 13 interface of the parallel port Jl.

[0012] Preferably, the 31 port of the ST7920 chip is connected with the 14 interface of the parallel port J1, the 33 port of the ST7920 chip is connected with the 34 port of the ST7920 chip, the 35 port of the ST7920 chip, the 38 port of the ST7920 chip, one end of the capacitor C5, one end of the resistor 9 and the 17 interface of the parallel port J1 respectively, the other end of the resistor 9 is connected with the 1 port of the VR joint, the 1 port of the 5.1 joint is connected with one end of the resistor R8, the 35 port of the ST7920 chip is connected with one end of the capacitor C4, and the other end of the capacitor C4 is connected with the 36 port of the ST7920 chip.

[0013] Preferably, the 19 interface of the parallel port J1 is connected with one end of the resistor R10, one end of the resistor R11 and the 2 joint of the joint A respectively, the other end of the resistor R10 and the other end of the resistor R11 are both connected with the positive electrode of the light emitting diode D1, the negative electrode of the light emitting diode D1 is connected with the 1 joint of the joint K and the 20 interface of the parallel port J1, the 2 joint of the joint K, the 2 joint of the joint S, the 1 interface of the parallel port J1 and the other end of the capacitor C5 are all grounded.

[0014] Preferably, the ST7920 chip is provided with five pieces which are connected with the display screen respectively.

[0015] Preferably, the main control module is set to be compatible with the chip AIP31020 and the chip UCI79200; the driving module is set to be compatible with the chip AIP31065 / UCI7065, and the compatible chip AIP31065 / UCI7065 is provided with five pieces which are connected with the display screen respectively.

[0016] Preferably, the driving module is set to be the combined structure of the NT7065 chip and the NT7063 chip, the NT7065 chip is provided with one piece which is connected with the display screen, and the NT7063 chip is provided with two pieces which are connected with the display screen respectively.

[0017] Preferably, the driving module is set to be the combined structure of the NT7065 chip and the NT7063 chip, the NT7065 chip is provided with three pieces which are connected with the display screen respectively, and the NT7063 chip is provided with one piece which is connected with the display screen.

[0018] Preferably, the sub control module comprises five NT7065 chips.

[0019] Compared with the prior art, the application has the beneficial effects that:

[0020] By using five NT7065 chips to replace the AIP31021 (ST7921, UCI7921) chips in the prior art, the problem of the AIP31021 (ST7921, UCI7921) chips being unable to be supplied is effectively solved, and the cost is reduced, and the market price of the NT7065 chip is much lower than that of the AIP31021 (ST7921, UCI7921) chip. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a circuit schematic diagram of the display module of the present application;

[0022] Figure 2 It is a circuit schematic diagram of the control module of the present application;

[0023] Figure 3 It is a first NT7065 chip circuit schematic diagram of the sub-control module of the present application;

[0024] Figure 4 It is a second NT7065 chip circuit schematic diagram of the sub-control module of the present application;

[0025] Figure 5 It is a third NT7065 chip circuit schematic diagram of the sub-control module of the present application;

[0026] Figure 6 It is a fourth NT7065 chip circuit schematic diagram of the sub-control module of the present application;

[0027] Figure 7 It is a fifth NT7065 chip circuit schematic diagram of the sub-control module of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0029] Please refer to Figures 1-7 The present application provides a COB liquid crystal display module with a serial and parallel port and a Chinese character library, comprising a control module, a driving module, a display screen, an input interface module and a backlight module, characterized in that the input interface module receives a backlight power signal and transmits the backlight power signal to the backlight module and the control module, the control module converts the backlight power signal into a corresponding control signal and transmits the control signal to the driving module, and the driving module controls the start, the shutdown and the display of different brightness of the display screen according to the corresponding control signal.

[0030] The driving module is used for controlling the display screen;

[0031] The display screen is used for displaying subtitles;

[0032] The input interface module comprises a 20PIN serial parallel port circuit, the 20PIN serial parallel port circuit is connected with the CON port and the control chip in series, and is directly connected to the serial port of the computer through the CON port;

[0033] The control module comprises a main control module and a sub control module.

[0034] The main control module comprises an ST7920 chip, the V0 port of the ST7920 chip is connected with the 2 port of the VR joint, one end of the resistor R1, the 2 port of the 4.9 joint, the 2 port of the 5.1 joint and the 3 interface of the parallel port J1, the 1 port of the ST7920 chip is connected with the other end of the resistor R1 and one end of the resistor R2, the 2 port of the ST7920 chip is connected with the other end of the resistor R2 and one end of the resistor R3, the 3 port of the ST7920 chip is connected with the other end of the resistor R3 and one end of the resistor R4, the 4 port of the ST7920 chip is connected with the other end of the resistor R4 and one end of the resistor R5, the other end of the resistor R5 is grounded, the 9 port of the ST7920 chip is connected with one end of the capacitor C3 and the 20 port of the ST7920 chip respectively, the 10 port of the ST7920 chip is connected with one end of the resistor R6, the 14 port of the ST7920 chip and the 39 port of the ST7920 chip respectively, the 11 port of the ST7920 chip is connected with the other end of the resistor R6, the other end of the capacitor C3 and the 17 interface of the parallel port J1 respectively, the 17 port of the ST7920 chip is connected with the 4 interface of the parallel port J1, the 18 port of the ST7920 chip is connected with the 5 interface of the parallel port J1, and the 19 port of the ST7920 chip is connected with the 6 interface of the parallel port J1.

[0035] The 21 port of the ST7920 chip is connected with one end of the resistor R7, the other end of the resistor R7 is connected with the 22 port of the ST7920 chip, the 23 port of the ST7920 chip is connected with the 14 interface of the parallel port J1, the 2 contact of the joint P and the 1 contact of the joint S respectively, the 24 port of the ST7920 chip is connected with the 7 interface of the parallel port J1, the 25 port of the ST7920 chip is connected with the 8 interface of the parallel port J1, the 26 port of the ST7920 chip is connected with the 9 interface of the parallel port J1, the 27 port of the ST7920 chip is connected with the 10 interface of the parallel port J1, the 28 port of the ST7920 chip is connected with the 11 interface of the parallel port J1, the 29 port of the ST7920 chip is connected with the 12 interface of the parallel port J1, and the 30 port of the ST7920 chip is connected with the 13 interface of the parallel port J1.

[0036] The 31 port of the ST7920 chip is connected with the 14 interface of the parallel port J1, the 33 port of the ST7920 chip is connected with the 34 port of the ST7920 chip, the 35 port of the ST7920 chip, the 38 port of the ST7920 chip, one end of the capacitor C5, one end of the resistor 9 and the 17 interface of the parallel port J1 respectively, the other end of the resistor 9 is connected with the 1 port of the VR connector, the 1 port of the 5.1 connector is connected with one end of the resistor R8, the 35 port of the ST7920 chip is connected with one end of the capacitor C4, and the other end of the capacitor C4 is connected with the 36 port of the ST7920 chip.

[0037] The 19 interface of the parallel port J1 is connected with one end of the resistor R10, one end of the resistor R11 and the 2 contact of the connector A respectively, the other end of the resistor R10 and the other end of the resistor R11 are both connected with the positive electrode of the light emitting diode D1, the negative electrode of the light emitting diode D1 is connected with the 1 contact of the connector K and the 20 interface of the parallel port J1, the 2 contact of the connector K, the 2 contact of the connector S, the 1 interface of the parallel port J1 and the other end of the capacitor C5 are all grounded.

[0038] The ST7920 chip is provided with five pieces connected with the display screen respectively.

[0039] The main control module is set to be compatible with the chip AIP31020 and the chip UCI79200; the driving module is set to be compatible with the chip AIP31065 / UCI7065, and the compatible chip AIP31065 / UCI7065 is provided with five pieces connected with the display screen respectively.

[0040] The driving module is set to be a combined structure of the NT7065 chip and the NT7063 chip, the NT7065 chip is provided with one piece connected with the display screen, and the NT7063 chip is provided with two pieces connected with the display screen respectively.

[0041] The driving module is set to be a combined structure of the NT7065 chip and the NT7063 chip, the NT7065 chip is provided with three pieces connected with the display screen respectively, and the NT7063 chip is provided with one piece connected with the display screen.

[0042] The sub control module includes five NT7065 chips. By replacing the AIP31021 (ST7921, UCI7921) chip with the five NT7065 chips, the phenomenon of high price and insufficient production capacity of the AIP31021 (ST7921, UCI7921) chip is avoided.

[0043] The present application effectively solves the problem of AIP31021 (ST7921, UCI7921) chip production capacity cannot be supplied by using five NT7065 chips to replace the AIP31021 (ST7921, UCI7921) chip in the prior art, and the cost is reduced, and the market price of the NT7065 chip is much lower than that of the AIP31021 (ST7921, UCI7921) chip.

[0044] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A COB liquid crystal display module with serial and parallel ports and a Chinese character library, comprising a control module, a drive module, a display screen, an input interface module and a backlight module, characterized in that: The input interface module receives the backlight power signal and transmits it to the backlight module and the control module. The control module converts the backlight power signal into a corresponding control signal and transmits it to the driving module. The driving module controls the start, shut down and display of different brightness of the display screen according to the corresponding control signal. The driving module is used to control the display screen; The display screen is used to display subtitles; The input interface module includes a 20-pin serial-parallel port circuit, which is connected in series with the CON port and the control chip, and is directly connected to the serial port of the computer through the CON port; The control module includes a main control module and a sub-control module; The main control module includes an ST7920 chip, wherein the V0 port of the ST7920 chip is connected to the 2nd port of the VR connector, one end of the resistor R1, the 2nd port of the 4.9 connector, the 2nd port of the 5.1 connector and the 3rd port of the parallel port J1, the 1st port of the ST7920 chip is connected to the other end of the resistor R1 and one end of the resistor R2, the 2nd port of the ST7920 chip is connected to the other end of the resistor R2 and one end of the resistor R3, the 3rd port of the ST7920 chip is connected to the other end of the resistor R3 and one end of the resistor R4, the 4th port of the ST7920 chip is connected to the other end of the resistor R4 and one end of the resistor R5, and the other end of the resistor R5 is grounded. Port 9 of the ST7920 chip is connected to one end of the capacitor C3 and port 20 of the ST7920 chip, respectively; port 10 of the ST7920 chip is connected to one end of the resistor R6, port 14 of the ST7920 chip, and port 39 of the ST7920 chip, respectively; port 11 of the ST7920 chip is connected to the other end of the resistor R6, the other end of the capacitor C3, and interface 17 of the parallel port J1, respectively; port 17 of the ST7920 chip is connected to interface 4 of the parallel port J1; port 18 of the ST7920 chip is connected to interface 5 of the parallel port J1; and port 19 of the ST7920 chip is connected to interface 6 of the parallel port J1; Port 21 of the ST7920 chip is connected to one end of the resistor R7, the other end of the resistor R7 is connected to port 22 of the ST7920 chip, port 23 of the ST7920 chip is respectively connected to interface 14 of parallel port J1, contact 2 of connector P, and contact 1 of connector S, port 24 of the ST7920 chip is connected to interface 7 of parallel port J1, port 25 of the ST7920 chip is connected to interface 8 of parallel port J1, port 26 of the ST7920 chip is connected to interface 9 of parallel port J1, port 27 of the ST7920 chip is connected to interface 10 of parallel port J1, port 28 of the ST7920 chip is connected to interface 11 of parallel port J1, port 29 of the ST7920 chip is connected to interface 12 of parallel port J1, and port 30 of the ST7920 chip is connected to interface 13 of parallel port J1; Port 31 of the ST7920 chip is connected to interface 14 of the parallel port J1, port 33 of the ST7920 chip is respectively connected to port 34 of the ST7920 chip, port 35 of the ST7920 chip, port 38 of the ST7920 chip, one end of capacitor C5, one end of resistor 9 and interface 17 of the parallel port J1, the other end of the resistor 9 is connected to port 1 of the VR connector, port 1 of the 5.1 connector is connected to one end of resistor R8, port 35 of the ST7920 chip is connected to one end of capacitor C4, and the other end of the capacitor C4 is connected to port 36 of the ST7920 chip; Interface 19 of the parallel port J1 is respectively connected to one end of a resistor R10, one end of a resistor R11, and contact 2 of connector A. The other ends of the resistors R10 and R11 are both connected to the positive electrode of a light-emitting diode D1. The negative electrode of the light-emitting diode D1 is connected to contact 1 of connector K and interface 20 of the parallel port J1. Contact 2 of connector K, contact 2 of connector S, interface 1 of the parallel port J1, and the other end of the capacitor C5 are all grounded. The ST7920 chip has five parts that are respectively connected to the display screen; The main control module is configured to be compatible with the chip AIP31020 and the chip UCI79200; the driving module is configured to be compatible with the chip AIP31065 / UCI7065, and the compatible chip AIP31065 / UCI7065 is provided with five parts respectively connected to the display screen; The driving module is configured as a combination of an NT7065 chip and an NT7063 chip, wherein the NT7065 chip has one piece connected to the display screen, and the NT7063 chip has two pieces connected to the display screen respectively; The driving module is configured as a combination of an NT7065 chip and an NT7063 chip, wherein the NT7065 chip has three pieces connected to the display screen, and the NT7063 chip has one piece connected to the display screen; The sub-control module includes five NT7065 chips.

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