CN218159521U - Liquid crystal display module with COB interface protocol and COG interface protocol - Google Patents

Abstract

The utility model provides a liquid crystal display module with COB interface protocol and COG interface protocol, which comprises an iron frame, a PCB, a COG display assembly, a COB interface and a single conversion chip; the iron frame is arranged on the front surface of the PCB, and a COG display assembly is further arranged on the end surface of the iron frame, which is far away from the PCB; the lower extreme of PCB board still is equipped with the COB interface, just the reverse side of PCB board or openly are equipped with single conversion chip. The utility model discloses a set up COG and show glass, COB display interface and single conversion chip to realize COG and COB display module assembly's communication control agreement's unity, can make the user directly use the COG product under the condition that does not change product structure and software, and the user can realize new function and the facility that the COG product brought under the condition of modifying few part software.

Description

Liquid crystal display module with COB interface protocol and COG interface protocol

Technical Field

The utility model relates to a display module assembly technical field especially relates to a take LCD module assembly of COB interface protocol and COG interface protocol.

Background

Mainstream industry LCM liquid crystal display module divide into COB structure and COG structure on the market now, and the communication control agreement of two kinds of liquid crystal display module is mutually incompatible, and COB display module market is earlier than COG, and current product has the COB module that most still used. COB is through external resistance partial pressure control display contrast, and COG sets up the contrast through protocol command input value, and the control command and the data format of two money are totally different, and there are many COG products overall dimension and display effect on the existing market and can replace COB, nevertheless because instruction and data format are different, can not realize direct substitution, must realize using COG product normal work through the user modification product software.

COB module compares COG module shortcoming is with high costs, the technology is complicated, through the PCB board, many chips cooperate the conducting resin strip that is shaded to connect LCD glass, constitute by the chase is fixed again and COG is pasted single chip on LCD glass and is drawn out through FPC soft arranging wire and can provide user interface, the chip material shortage, and COB product has different branch structure, for example, take national standard chinese character storehouse and do not take national standard chinese character storehouse communication protocol incompatible, take the word storehouse to have the serial ports function, do not take the word storehouse not have this function, can not use software real-time regulation to show contrast, can only pass through hardware regulation etc. but use COG display module's the appearance and display effect can reach COB's effect but because communication control protocol incompatible leads to the end user to need redesign user's software and change product inner structure.

And the COG replacing COB scheme in the market is compatible with the appearance size, the display size and the effect, but the control protocol, the control instruction, the display data format, the contrast adjusting mode and the like are not compatible with the COB scheme, so that if the COG replacing scheme needs to be replaced, a user needs to modify a mainboard program and a contrast adjusting part circuit to realize complete compatibility and normal use, the direct and complete replacement use of the mainboard program and the circuit can be realized without changing the mainboard program and the circuit, the development period and the development time are greatly saved, and the product is more economical.

Disclosure of Invention

The utility model provides a take liquid crystal display module assembly of COB interface protocol and COG interface protocol, including chase, PCB board, COG display module assembly, COB interface and single conversion chip;

the iron frame is arranged on the front side or the back side of the PCB, and a COG display assembly is further arranged on the end face, away from the PCB, of the iron frame;

the lower extreme of PCB board still is equipped with the COB interface, just the reverse side of PCB board or openly are equipped with single conversion chip.

Optionally, the COG display module includes COG display glass and a display dot matrix disposed on the COG display glass; the COG display glass is arranged on the end face, far away from the PCB, of the iron frame, and the display dot matrix is arranged on the end face, far away from the iron frame, of the COG display glass.

Optionally, the single conversion chip is configured to be a conversion chip structure for implementing mutual conversion between the conversion COB interface protocol and the COG interface protocol.

Optionally, the COB interface is configured as a bit interface structure.

Optionally, the iron frame is connected with the PCB through an iron frame foot fastener.

Optionally, the upper end of the PCB is further provided with an upper concave area, and the middle of the upper concave area is provided with a Flexible Printed Circuit (FPC) cable.

Optionally, a cavity for the LED screen assembly is provided between the bezel and the front surface of the PCB.

Optionally, the LED screen assembly includes an LED glass and a backlight.

Use the technical scheme of the utility model, following beneficial effect has:

the utility model discloses a set up COG and show glass, COB display interface and single conversion chip to realize COG and COB display module's communication control agreement's unity, can make the user directly use the COG product under the condition that does not change product structure and software, and the user can realize new function and convenience and higher economic nature that the COG product brought under the condition of modifying few part software. The scheme can cover the conventional COB liquid crystal screen replacing COG series products such as 12232 series, 12832 series, 14432 series, 12864 series, 19264 series, 240128 series, 320240 series and the like on the existing market.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

fig. 1 is a schematic front view of a liquid crystal display module according to the present invention with a COB interface protocol and a COG interface protocol;

FIG. 2 is a schematic left side view of FIG. 1;

FIG. 3 is a block diagram of a COG LCD-to-COB interface of FIG. 1;

fig. 4 is a block diagram of the COB liquid crystal display LCM of fig. 1.

Detailed Description

The embodiments of the invention will be described in detail hereinafter with reference to the accompanying drawings, but the invention can be implemented in many different ways, which are defined and covered by the claims.

In order to make the above objects, features, advantages, and the like of the present invention more clearly understandable, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings of the utility model all adopt simplified forms and all use non-precise proportions, and are only used for conveniently and clearly assisting in explaining the implementation of the utility model; the number mentioned in the present invention is not limited to the specific number in the example of the drawings; the present invention relates to a bearing or positional relationship indicated by the directions of ' front ' middle ' rear ' left ' right ' upper ' lower ' top ' bottom ' middle ' and the like, which is not based on the position or positional relationship shown in the drawings of the present invention, but does not indicate or suggest that the indicated device or component must have a specific direction, and cannot be understood as a limitation of the present invention.

Referring to fig. 1 to 4, the liquid crystal display module with COB interface protocol and COG interface protocol provided by the present invention includes an iron frame 01, a FPC flexible flat cable 02, a PCB board 03, a display dot matrix 04, a COG display glass 05, a COB interface 06, a FPC connecting seat 07, a single conversion chip 08, and a LED screen assembly 09;

the iron frame 01 is arranged on the front side of the PCB 03, and the iron frame 01 is connected with the PCB 03 through a black-white double-sided adhesive tape;

the upper end of the PCB 03 is also provided with an upper concave area, and the middle part of the upper concave area is provided with an FPC (flexible printed circuit) flexible flat cable 02; a COB interface is further arranged at the lower end of the PCB 03 and is of a 20-bit interface structure;

the end face, far away from the PCB 03, of the iron frame 01 is further provided with COG display glass 05, and a display dot matrix 04 is arranged on the surface of the COG display glass 05.

Optionally, the reverse side of the PCB 03 is further provided with an FPC connecting seat 07 and a single conversion chip 08, the FPC connecting seat and the FPC flexible flat cable 02 are disposed at corresponding positions, and the single conversion chip 08 is disposed at the central position of the PCB 03 and used for realizing the interconversion between the COB interface protocol and the COG interface protocol.

Optionally, a cavity for the LED screen assembly 09 is disposed between the bezel 01 and the front surface of the PCB 03.

Optionally, the LED screen assembly 09 includes LED glass and a backlight.

Besides, the utility model provides a take liquid crystal display module assembly of COB interface protocol and COG interface protocol still can be according to actual demand, get rid of chase 01.

COB theory of operation: the user host sends COB instructions or data to the COB port, the COB main chip analyzes the instructions and the data, the display output part of the control IC outputs display signals, the display signals which are additionally beyond the display range of the main chip are sent to the related auxiliary IC, the auxiliary IC outputs the display signals to drive the LCD to display glass, and the display data and the working state data can be read back by the user host.

The COG working principle is as follows: the user host sends the COG instruction or data to the COG chip, the COG is of a single chip structure, the instruction and the data can be analyzed, the driving output signal of the LCD glass can be provided for displaying, and the display data and the working state data can be read back by the user host.

The working principle of the scheme is as follows: the conversion chip is matched with a special conversion program in the chip to store COB instructions or data sent by a user host into a conversion chip memory, the received instructions judge the functions through analysis and then send COG instructions with the same functions to a COG display module through a COG interface of the conversion chip to display, if the received instructions are display data, the conversion chip can firstly backup data in an internal storage space for the user host to read back, then the COB data format converted into COG data is sent to the COG display module through the COG interface to display, and working state data of the COG is also read back through the conversion chip, converted into COB state data and then stored in the internal storage space for the user host to read back and monitor the state of the display module.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (8)

1. A liquid crystal display module with a COB interface protocol and a COG interface protocol is characterized by comprising an iron frame (01), a PCB (03), a COG display assembly, a COB interface (06) and a single conversion chip (08);

the iron frame (01) is arranged on the front side or the back side of the PCB (03), and a COG display assembly is further arranged on the end face, far away from the PCB (03), of the iron frame (01);

the lower extreme of PCB board (03) still is equipped with COB interface (06), just the reverse side of PCB board (03) is equipped with single conversion chip (08).

2. The liquid crystal display module with the COB interface protocol and the COG interface protocol of claim 1, wherein the COG display assembly comprises a COG display glass (05) and a display lattice (04) arranged on the COG display glass (05); the COG display glass (05) is arranged on the end face, far away from the PCB (03), of the iron frame (01), and the display dot matrix (04) is arranged on the end face, far away from the iron frame (01), of the COG display glass (05) 2.

3. The LCD module with COB interface protocol and COG interface protocol as claimed in claim 1, wherein the single conversion chip (08) is configured as a conversion chip structure for realizing the mutual conversion between COB interface protocol and COG interface protocol.

4. The liquid crystal display module with the COB interface protocol and the COG interface protocol of claim 1, wherein the COB interface is configured as a 20-bit interface structure.

5. The liquid crystal display module with the COB interface protocol and the COG interface protocol according to any one of claims 1-4, wherein the bezel (01) is connected to the PCB board (03) by a bezel leg clip.

6. The liquid crystal display module with the COB interface protocol and the COG interface protocol as claimed in claim 5, wherein an upper concave area is further arranged at the upper end of the PCB (03), and an FPC flexible flat cable (02) is arranged in the middle of the upper concave area.

7. The liquid crystal display module with the COB interface protocol and the COG interface protocol according to claim 6, wherein a cavity for the LED screen assembly (09) is disposed between the bezel (01) and the front surface of the PCB board (03).

8. The liquid crystal display module with COB interface protocol and COG interface protocol of claim 7, characterized in that the LED screen assembly (09) comprises LED glass and backlight.

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