CN216697718U

CN216697718U - TFT liquid crystal display module of integrated button PCBA control panel

Info

Publication number: CN216697718U
Application number: CN202123096852.XU
Authority: CN
Inventors: 周海兵; 陆建树; 朱德益; 陈文斌; 杨慧; 宁赞武
Original assignee: Guangxi Tianshan Electronic Co ltd
Current assignee: Guangxi Tianshan Electronic Co ltd
Priority date: 2021-12-10
Filing date: 2021-12-10
Publication date: 2022-06-07
Anticipated expiration: 2031-12-10

Abstract

The utility model discloses a TFT liquid crystal display module of integrated key PCBA control panel, integrate the key PCBA control panel in order to form TFT liquid crystal display module to supply customer on the basis of TFT liquid crystal display, only need to connect customer terminal with customer end bus of TFT liquid crystal display module like this, can realize the display of the customer terminal and function of key control perfectly; the method is simple and convenient, and reduces the cost of the user for automatically connecting the external keyboard control panel; the reliability is high, and the device can adapt to high-interference occasions or other severe occasions; in addition, through reasonable optimal design and adjustment circuit, let keying circuit's button and LED indicating circuit's LED instruct and be located TFT liquid crystal display's next door to in key operation and pilot lamp show, and let keying circuit and LED indicating circuit's other parts be located TFT liquid crystal display's below, thereby can furthest reduce the size of TFT liquid crystal display module assembly product, effectively avoid installing the limited problem in space of key control board.

Description

TFT liquid crystal display module of integrated button PCBA control panel

Technical Field

The utility model relates to the technical field of TFT liquid crystal screens, in particular to a TFT liquid crystal display module integrated with a key PCBA control board.

Background

With the development of display technology, TFT liquid crystal panels are used more and more widely, and the integration of TFT liquid crystal panels and control parts such as keys thereof also becomes a problem to be solved urgently. The conventional design scheme for integrally carrying out virtual keys on the touch screen increases the process difficulty in production, has poor anti-interference capability in use, and cannot meet the situation that physical keys such as a physical keyboard are needed in some special purposes in the market. Therefore, although the integrated solution of the touch screen has been widely used, there are always high-interference situations or other bad situations that cannot be accommodated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that the existing high-integration touch screen scheme has high process difficulty and can not meet the key control requirement under severe conditions, and provides a TFT liquid crystal display module integrated with a key PCBA control board.

In order to solve the problems, the utility model is realized by the following technical scheme:

the TFT liquid crystal display module of the integrated button PCBA control panel, by TFT liquid crystal display, button PCBA control panel and customer end bus make up; the key PCBA control board is provided with a client end connector, a TFT connector, a key circuit and an LED indicating circuit; the key circuit is connected with the client terminal connector through PCB wiring; the LED indicating circuit is connected with the client connector through PCB wiring; the client connector is connected with the TFT connector through PCB wiring; the size of the key PCBA control plate is larger than that of the TFT liquid crystal display screen, the TFT liquid crystal display screen is horizontally arranged right above the upper surface of the key PCBA control plate, and keys of the key circuit and LED indicator lamps of the LED indicator circuit are positioned beside the TFT liquid crystal display screen, namely the edge of the upper surface of the key PCBA control plate; a connector arranged on the TFT liquid crystal display screen is connected with a TFT connector of a key PCBA control panel; one end of the client bus is connected with the client connector, and the other end of the client connector is connected with the external client terminal.

In the above scheme, the key circuit is a matrix scanning type entity key circuit.

In the scheme, the keys of the key circuit are positioned on the left side and the right side of the TFT liquid crystal display screen.

In the scheme, the LED indicating circuit consists of a key LED indicating circuit and a state LED indicating circuit; the power supply ends of the key LED indicating circuit and the state LED indicating circuit are connected with the client end connector through PCB wiring; the data input end of the key LED indicating circuit is connected with the client connector through PCB wiring, and the data input end of the state LED indicating circuit is connected with the data output end of the key LED indicating circuit through PCB wiring.

In the scheme, the LED indicator lamp of the LED indicating circuit comprises a key LED indicator lamp and a state LED indicator lamp; the key LED indicator lamps are positioned near corresponding keys on the left side and the right side of the TFT liquid crystal display screen; the status LED indicator lamp is positioned on the front side of the TFT liquid crystal display screen.

Compared with the prior art, the utility model integrates the key PCBA control panel on the basis of the existing TFT liquid crystal display screen to form the TFT liquid crystal display screen module for the client, thus the functions of displaying and key control of the client terminal can be perfectly realized only by connecting the client terminal with the client bus of the TFT liquid crystal display screen module; the method is simple and convenient, and the cost of the user for automatically connecting the external keyboard control panel is reduced; the reliability is high, and the device can adapt to high-interference occasions or other severe occasions; in addition, through reasonable optimal design and adjustment circuit, let keying circuit's button and LED indicating circuit's LED instruct and be located TFT liquid crystal display's next door to in key operation and pilot lamp show, and let keying circuit and LED indicating circuit's other parts be located TFT liquid crystal display's below, thereby can furthest reduce the size of TFT liquid crystal display module assembly product, effectively avoid installing the limited problem in space of key control board.

Drawings

FIG. 1 is a top view structure diagram of a TFT LCD module integrated with a key PCBA control board.

FIG. 2 is a side view structure of the TFT LCD module of the integrated key PCBA control panel.

FIG. 3 is a schematic block diagram of a key PCBA control board.

Fig. 4 is a schematic diagram of a key circuit.

FIG. 5 is a schematic diagram of a key LED indicating circuit.

FIG. 6 is a schematic diagram of a status LED indicating circuit.

Figure 7 is a schematic diagram of a client connector.

Fig. 8 is a schematic diagram of a TFT connector.

Reference numbers in the figures: 1. a TFT liquid crystal display screen; 2. a key PCBA control panel; 2-1, pressing a key; 2-2, LED indicator light; 3. a client bus.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to specific examples.

A TFT liquid crystal display module of integrated button PCBA control panel, as shown in fig. 1 and 2, by TFT liquid crystal display 1, button PCBA control panel 2 and client bus 3 constitution. The key PCBA control board 2 is provided with a client connector, a TFT connector, a key circuit and an LED indicating circuit, as shown in figure 3. The key circuit is connected with the client terminal connector through PCB wiring; the LED indicating circuit is connected with the client connector through PCB wiring; the client connector and the TFT connector are connected through PCB wiring. The size of button PCBA control panel 2 is greater than TFT liquid crystal display 1's size, and TFT liquid crystal display 1 level sets up directly over button PCBA control panel 2 upper surface, and button circuit's button 2-1 and LED pilot lamp 2-2 of LED pilot circuit are located TFT liquid crystal display 1's next door, also the edge of button PCBA control panel 2 upper surface. In the present embodiment, the keys 2-1 of the key circuit are located on the left and right sides of the TFT liquid crystal display panel 1. The LED indicator lamp 2-2 of the LED indicating circuit comprises a key LED indicator lamp and a status LED indicator lamp; the key LED indicator lamps are positioned near corresponding keys on the left side and the right side of the TFT liquid crystal display screen 1; the status LED indicator light is located on the front side of the TFT liquid crystal display 1. The connector on the TFT LCD screen 1 is connected with the TFT connector of the key PCBA control board 2. One end of the client bus 3 is connected to the client connector, and the other end of the client connector is connected to an external client terminal.

The key circuit is a matrix scanning type entity key circuit. In this embodiment, a schematic diagram of the KEY circuit is shown in fig. 4, and the KEY circuit mainly includes 13 physical KEYs S200-S212, one end of each of the physical KEYs S200-S212 is connected to a KEY _ COL pin corresponding to the client connector, and the other end of each of the physical KEYs S200-S212 is connected to a KEY _ ROW pin corresponding to the client connector.

The LED indicating circuit consists of a key LED indicating circuit and a state LED indicating circuit. The power supply ends of the key LED indicating circuit and the state LED indicating circuit are connected with the client end connector through PCB wiring; the data input end of the key LED indicating circuit is connected with the client connector through PCB wiring, and the data input end of the state LED indicating circuit is connected with the data output end of the key LED indicating circuit through PCB wiring.

In the present embodiment, a schematic diagram of the key LED indicator circuit is shown in fig. 5, which is mainly composed of 4 shift buffers D200-D203, 13 two-color key LED indicators V200-V212, and peripheral resistors and capacitors. The 4 shift buffers D200-D203 are cascaded in sequence, i.e. the DS port of the first shift buffer D200 is connected to the LED _ SHDIN pin of the client connector, the Q7S port of the first shift buffer D200 is connected to the DS port of the second shift buffer D201, the Q7S port of the second shift buffer D201 is connected to the DS port of the third shift buffer D202, and the Q7S port of the third shift buffer D202 is connected to the DS port of the fourth shift buffer D203. The VCC ports of all the shift buffers D200-D203 are connected to the 3.3V _ LCD pin of the client connector. The GND ports of all the shift buffers D200-D203 are grounded. the/OE ports of all the shift buffers D200-D203 are connected to the LED _ SHEN pin of the client connector. The STcp ports of all the shift buffers D200-D203 are connected to the LED _ STcp pin of the client connector. The SHcp ports of all the shift buffers D200-D203 are connected to the LED _ SHCP pin of the client connector. the/MR ports of all shift buffers D200-D203 are connected to the LED _ stress pin of the client connector. The ports Q0-Q7 of the displacement buffer D200 are sequentially connected with 2 cathode ends of the two-color key LED indicator lamps V200-V203; 2 anode terminals of the two-color KEY LED indicator lamps V200-V203 are respectively connected with a pin +3V3 KEY _ G and a pin +3V3 KEY _ R of the client connector. The ports Q0-Q7 of the displacement buffer D201 are sequentially connected with 2 cathode ends of the two-color key LED indicator lamps V204-V207; 2 anode terminals of the two-color KEY LED indicator lamps V204-V207 are respectively connected with a pin +3V3 KEY _ G and a pin +3V3 KEY _ R of the client connector. The ports Q0-Q7 of the displacement buffer D202 are sequentially connected with 2 cathode ends of the two-color key LED indicator lamps V208-V211; 2 anode ends of the two-color KEY LED indicator lamps V208-V211 are respectively connected with a pin +3V3 KEY _ G and a pin +3V3 KEY _ R of the client connector. Ports Q0-Q1 of the displacement buffer D203 are respectively connected with 2 cathode terminals of the two-color key LED indicator lamp V212. The Q2 port of the shift buffer D203 forms an LED _ ART port, and is connected to the LED _ ART port of the status LED indication circuit. The Q3 port of the shift buffer D203 forms an LED _ AGN port, and is connected to the LED _ AGN port of the status LED indication circuit.

In the present embodiment, a schematic diagram of the status LED indicating circuit is shown in fig. 6, and it mainly comprises triodes Q200-Q203, 3 two-color key LED indicators V213-V215, and peripheral resistors and capacitors. The base of the transistor Q200 forms an LED _ ART port, and the collector of the transistor Q200 and the base of the transistor Q201 are connected to the 3.3V _ LCD pin of the client connector. The base of the transistor Q202 forms an LED _ AGN port, and the collector of the transistor Q202 and the base of the transistor Q203 are connected to the 3.3V _ LCD pin of the client connector. The collector of the triode Q201 is simultaneously connected with one cathode end of 3 two-color key LED indicator lamps V213-V215. The collector of the triode Q202 is simultaneously connected with the other cathode terminal of the 3 two-color key LED indicator lamps V213-V215. The anode terminals of the 3 two-color status LED indicator lamps V213-V215 are respectively connected with the pin +5V _ AL _ G and the pin +5V _ AL _ R of the client connector. The emitters of the transistors Q200-Q203 are grounded.

In this embodiment, the schematic diagram of the client connector is shown in fig. 7, which is a 40-pin connector, and the schematic diagram of the TFT connector is shown in fig. 8, which is a 24-pin connector.

It should be noted that, although the above-mentioned embodiments of the present invention are illustrative, the present invention is not limited thereto, and thus the present invention is not limited to the above-mentioned embodiments. Other embodiments, which can be made by those skilled in the art in light of the teachings of the present invention, are considered to be within the scope of the present invention without departing from its principles.

Claims

1. The TFT liquid crystal display module of the integrated key PCBA control panel, its characteristic is, by TFT liquid crystal display (1), key PCBA control panel (2) and customer end bus (3) make up;

the key PCBA control board (2) is provided with a client end connector, a TFT connector, a key circuit and an LED indicating circuit; the key circuit is connected with the client terminal connector through PCB wiring; the LED indicating circuit is connected with the client connector through PCB wiring; the client connector is connected with the TFT connector through PCB wiring;

the size of the key PCBA control panel (2) is larger than that of the TFT liquid crystal display screen (1), the TFT liquid crystal display screen (1) is horizontally arranged right above the upper surface of the key PCBA control panel (2), and the keys (2-1) of the key circuit and the LED indicating lamps (2-2) of the LED indicating circuit are positioned beside the TFT liquid crystal display screen (1), namely the edge of the upper surface of the key PCBA control panel (2); a connector arranged on the TFT liquid crystal display screen (1) is connected with a TFT connector of the key PCBA control panel (2); one end of the client bus (3) is connected with the client connector, and the other end of the client connector is connected with the external client terminal.

2. The TFT LCD module of the PCBA control panel of the integrated key as recited in claim 1, wherein the key circuit is a matrix scanning type physical key circuit.

3. The TFT LCD module of the integrated key PCBA control panel of claim 1 or 2, wherein the keys (2-1) of the key circuit are positioned at the left and right sides of the TFT LCD (1).

4. The TFT LCD module of integrated key PCBA control panel of claim 1, wherein the LED indicating circuit is composed of a key LED indicating circuit and a status LED indicating circuit; the power supply ends of the key LED indicating circuit and the state LED indicating circuit are connected with the client end connector through PCB wiring; the data input end of the key LED indicating circuit is connected with the client connector through PCB wiring, and the data input end of the state LED indicating circuit is connected with the data output end of the key LED indicating circuit through PCB wiring.

5. The TFT LCD module of integrated button PCBA control panel of claim 1 or 4, wherein the LED indicator light (2-2) of the LED indicating circuit includes button LED indicator light and status LED indicator light; the key LED indicator lamps are positioned near corresponding keys on the left side and the right side of the TFT liquid crystal display screen (1); the status LED indicator lamp is positioned on the front side of the TFT liquid crystal display screen (1).