CN216928009U

CN216928009U - Double-interface straight-through TFT control circuit

Info

Publication number: CN216928009U
Application number: CN202220598533.4U
Authority: CN
Inventors: 刘家伟; 曲国宁; 张渊; 黄泽铭
Original assignee: Zhejiang Paidaxin Integrated Circuit Co ltd
Current assignee: Zhejiang Paidaxin Integrated Circuit Co ltd
Priority date: 2022-03-18
Filing date: 2022-03-18
Publication date: 2022-07-08
Anticipated expiration: 2032-03-18

Abstract

The utility model discloses a double-interface straight-through TFT control circuit, which comprises a mainboard driving interface A, a mainboard driving interface B, a full-pass TFT control circuit and a TFT screen driving circuit, wherein the mainboard driving interface A and the mainboard driving interface B are both connected with the full-pass TFT control circuit through MIPI buses, and the full-pass TFT control circuit is connected with the TFT screen driving circuit through the MIPI buses; the full-through TFT control circuit comprises a motherboard interface circuit A, a motherboard interface circuit B, an image processing chip, a booster circuit, a serial memory and a peripheral auxiliary circuit. The utility model adopts a double-interface straight-through structure, processes the signals of the mainboard to support TFT screens with different specifications, and has good applicability; meanwhile, the mode that the OLED mainboard is suitable for the TFT screen is provided, the brightness adjustment problem of the OLED is converted into the backlight adjustment of the TFT, the system cost can be reduced, and the production efficiency is improved.

Description

Double-interface straight-through TFT control circuit

Technical Field

The utility model relates to the technical field of display screen control, in particular to a double-interface straight-through TFT control circuit.

Background

An OLED (Organic Light-Emitting Diode) is also called an Organic electroluminescent display or an Organic Light-Emitting semiconductor. A TFT (thin Film transistor), also called a thin Film field effect transistor, has the advantages of high speed, high brightness and high contrast, but because the TFT is used as an LCD panel, it does not emit light, and needs a backlight LED as a light source to emit light. The OLED display screen and the TFT display screen are mainly applied to the mobile phone screen market, the OLED display screen is more expensive than the TFT screen due to different manufacturing processes, meanwhile, a TFT control circuit at the present stage is mostly in a single-interface setting and observation type structure, the application range is narrow, the stability is poor, the use is not flexible, and under the background, a double-interface straight-through type TFT control circuit is provided.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the utility model.

The present invention has been made in view of the above-mentioned problems occurring in the conventional display control.

Therefore, one of the objectives of the present invention is to provide a dual-interface pass-through TFT control circuit, which has a simple structure and is convenient to use, and the driving motherboard of the original OLED panel of the control circuit can drive the TFT panel, thereby reducing the system cost and improving the production efficiency.

In order to solve the technical problems, the utility model provides the following technical scheme: the all-pass type TFT LCD display panel comprises a mainboard driving interface A, a mainboard driving interface B, an all-pass type TFT control circuit and a TFT panel driving circuit, wherein the mainboard driving interface A and the mainboard driving interface B are both connected with the all-pass type TFT control circuit through MIPI buses, and the all-pass type TFT control circuit is connected with the TFT panel driving circuit through MIPI buses; the all-pass TFT control circuit comprises a mainboard interface circuit A, a mainboard interface circuit B, an image processing chip, a booster circuit, a serial memory and a peripheral auxiliary circuit.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the MIPI bus of the mainboard interface circuit A is connected with the MIPI bus input end of the image processing chip, and the output end of the image processing chip is connected with the TFT screen driving circuit through the MIPI bus output end.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the mainboard interface circuit A also provides a power supply VCI to be connected to a boosting module in the boosting circuit, and the boosting module provides voltage for the TFT screen driving circuit.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the motherboard interface circuit B is connected to the image processing chip through an I2C or SPI bus and an INTO signal line.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the image processing chip is also connected to the TFT screen driving circuit through an I2C or SPI bus and an INTI signal line.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the serial memory is connected to the TFT screen driving circuit through an SPI serial interface and used for driving an IC to provide code and parameter storage space.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the image processing chip is composed of a CX7701 chip and peripheral circuits thereof.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the voltage boosting circuit consists of an ANX6585D chip and peripheral circuits thereof.

As a preferable scheme of the dual-interface through-type TFT control circuit according to the present invention, wherein: the serial memory consists of a P25Q21L chip and its peripheral circuits.

The utility model has the beneficial effects that: the all-pass TFT screen control circuit has a simple integral structure and is convenient to use, on one hand, a double-interface through structure is adopted to process signals of a mainboard and support TFT screens with different specifications, and the all-pass TFT screen control circuit has good applicability and is more stable and flexible to use; on the other hand, the driving main board of the original OLED screen of the control circuit can drive the TFT screen, so that the connected TFT screen can work normally under the condition that the hardware of the OLED driving main board is not changed, a mode that the OLED main board is suitable for the TFT screen is provided, the brightness adjustment problem of the OLED is converted into the backlight adjustment of the TFT, the touch control of the TFT screen is converted into the touch control of the OLED, the system cost can be reduced, and the production efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

FIG. 1 is a system architecture framework of the present invention;

FIG. 2 is a block diagram of the circuit structure of the present invention;

FIG. 3-1 is a circuit diagram of motherboard interface A of the present invention;

FIG. 3-2 is a circuit diagram of motherboard interface B of the present invention;

FIG. 4 is a bridge chip circuit diagram of the present invention;

FIG. 5-1 is a circuit diagram of the ANX6585D module in the boost circuit of the present invention;

FIG. 5-2 is a circuit diagram of an LDO module of the boost circuit of the present invention;

FIG. 6 is a circuit diagram of a serial memory of the present invention.

Reference numbers in the figures: 1. a mainboard driving interface A; 2. a mainboard drive interface B; 3. a full-channel TFT control circuit; 4. a TFT panel drive circuit; 5. a boost circuit; 6. an image processing chip; 7. a serial memory; 8. a motherboard interface circuit B; 9. motherboard interface circuit a.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and it will be appreciated by those skilled in the art that the present invention may be practiced without departing from the spirit and scope of the present invention and that the present invention is not limited by the specific embodiments disclosed below.

Furthermore, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Referring to fig. 1 and fig. 2, an embodiment of the present invention provides an all-pass TFT screen control circuit, which includes a motherboard drive interface a1, a motherboard drive interface B2, an all-pass TFT control circuit 3, and a TFT screen drive circuit 4, where the motherboard drive interface a1 and the motherboard drive interface B2 are both connected to the all-pass TFT control circuit 3 through an MIPI bus, and the all-pass TFT control circuit 3 is connected to the TFT screen drive circuit 4 through an MIPI bus; the full-channel TFT control circuit 3 includes a motherboard interface circuit a9, a motherboard interface circuit B8, an image processing chip 6, a booster circuit 5, a serial memory 7, and peripheral auxiliary circuits.

Referring to fig. 3-1, the MIPI bus of the motherboard interface circuit a9 is connected to the MIPI bus input terminal of the image processing chip 6, and the output terminal of the image processing chip 6 is connected to the TFT screen driving circuit 4 through the MIPI bus output terminal; further, the motherboard interface circuit a9 also provides power VCI to connect to the boost module in the boost circuit 5, which provides voltage to the TFT panel driver circuit 4, the specific port connection is as shown in fig. 3-1.

Referring to fig. 3-2, motherboard interface circuit B8 is connected to image processing chip 6 via I2C or SPI bus and an INTO signal line, the specific port connections being as shown in fig. 3-2.

Referring to fig. 4, the image processing chip 6 is composed of a CX7701 chip and its peripheral circuits, and the image processing chip 6 is also connected to the TFT screen driving circuit 4 through an I2C or SPI bus and an INTI signal line, and the specific port connections are as shown in fig. 4.

Referring to fig. 5-1, the booster circuit 5 is composed of an ANX6585D chip and its peripheral circuits. And fig. 5-2 is a circuit diagram of the LDO module in the boost circuit 5.

Referring to fig. 6, the serial memory 7 is composed of a P25Q21L chip and its peripheral circuits, while the serial memory 7 is connected to the TFT panel driving circuit 4 through an SPI serial interface for driving the IC to provide code and parameter storage space.

In conclusion, the all-through TFT screen control circuit is simple in overall structure and convenient to use, on one hand, a double-interface through structure is adopted, signals of a mainboard are processed to support TFT screens with different specifications, the applicability is good, and the use is more stable and flexible; on the other hand, the driving main board of the original OLED screen of the control circuit can drive the TFT screen, so that the connected TFT screen can work normally under the condition that the hardware of the OLED driving main board is not changed, a mode that the OLED main board is suitable for the TFT screen is provided, the brightness adjustment problem of the OLED is converted into the backlight adjustment of the TFT, the touch control of the TFT screen is converted into the touch control of the OLED, the system cost can be reduced, and the production efficiency is improved.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

Claims

1. A double-interface through type TFT control circuit is characterized by comprising a mainboard driving interface A (1), a mainboard driving interface B (2), a full-pass type TFT control circuit (3) and a TFT screen driving circuit (4), wherein the mainboard driving interface A (1) and the mainboard driving interface B (2) are both connected with the full-pass type TFT control circuit (3) through MIPI buses, and the full-pass type TFT control circuit (3) is connected with the TFT screen driving circuit (4) through the MIPI buses;

the all-pass TFT control circuit (3) comprises a mainboard interface circuit A (9), a mainboard interface circuit B (8), an image processing chip (6), a booster circuit (5), a serial memory (7) and a peripheral auxiliary circuit.

2. A dual-interface pass-through TFT control circuit as claimed in claim 1, wherein the MIPI bus of the motherboard interface circuit a (9) is connected to the MIPI bus input of the image processing chip (6), and the output of the image processing chip (6) is connected to the TFT screen driving circuit (4) through the MIPI bus output.

3. A dual interface pass-through TFT control circuit as claimed in claim 2, wherein the motherboard interface circuit a (9) further provides a voltage source VCI connected to a boost block in the boost circuit (5), the boost block providing voltage to the TFT panel driver circuit (4).

4. A dual interface pass-through TFT control circuit as claimed in claim 3, wherein the motherboard interface circuit B (8) is connected to the image processing chip (6) through I2C or SPI bus and the INTO signal line.

5. A dual interface pass-through TFT control circuit according to claim 4, characterized in that the image processing chip (6) is further connected to the TFT screen driver circuit (4) through I2C or SPI bus and INTI signal line.

6. A dual interface pass-through TFT control circuit as claimed in claim 1, wherein the serial memory (7) is connected to the TFT screen driver circuit (4) via an SPI serial interface.

7. A dual-interface pass-through TFT control circuit according to any of claims 1, 2, 4 or 5, wherein the image processing chip (6) is composed of a CX7701 chip and its peripheral circuits.

8. A dual interface pass-through TFT control circuit as claimed in claim 1 or 3, wherein the boost circuit (5) is comprised of an ANX6585D chip and its peripheral circuits.

9. A dual interface pass-through TFT control circuit as claimed in claim 1 or 6, wherein the serial memory (7) is comprised of a P25Q21L chip and its peripheral circuits.