TFT driving chip, display system and mobile phone terminal

Abstract

The utility model provides a TFT (Thin Film Transistor) driving chip, a display system and a mobile phone terminal, which are applied to the technical field of liquid crystal display. According to the utility model, the TFT driving chip can change the OLED screen into the TFT screen under the condition that the display panel is not changed, so that the normal display of the display panel can be ensured, and the maintenance or replacement cost of the OLED screen can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal display technology, and in particular to a TFT driver chip, display system and mobile phone terminal. Background Technology

[0002] OLED (Organic Light-Emitting Diode), also known as organic electroluminescent display or organic light-emitting semiconductor, is self-emissive and does not require backlighting. However, its manufacturing cost is relatively high, and it is generally used in mid-to-high-end mobile phones. Currently, original OLED systems drive original OLED screens, while the method of controlling the screen operation using original OLED systems paired with TFT screens is more complex, and both require backlighting systems to solve the parsing and conversion of display instructions. Therefore, although OLED screens have advantages such as self-emissiveness, color saturation, and wide viewing angles, the complex manufacturing process and expensive materials result in high costs for repairing or replacing OLED screens, which is detrimental to the development of the entire industry. Utility Model Content

[0003] The purpose of this invention is to provide a TFT driver chip, a display system, and a mobile terminal to reduce the maintenance or replacement costs of OLED screens.

[0004] In the first aspect, to solve the above-mentioned technical problems, this utility model provides a TFT driving chip, including: a MIPI parsing module, used to filter out the driving signal of the OLED screen and write it into a buffer for parameter conversion and to obtain the driving signal of the TFT screen;

[0005] An image processing module, connected to the MIPI parsing module, is used to correct and adaptively adjust the driving signal of the TFT screen in order to optimize the color and compensate the brightness of the driving signal of the TFT screen.

[0006] The backlight control module, connected to the MIPI parsing module, is used to compare the driving signal of the TFT screen with the data pre-stored in the lookup table, and output brightness control based on the comparison result.

[0007] In one example, the driving signal for the TFT screen may include a PWM control signal.

[0008] Secondly, based on the same concept, this utility model also provides a display system, including: an OLED control board and a display panel; wherein,

[0009] The OLED control board is located on the mobile phone motherboard and is used to send driving signals for the OLED screen to the display panel.

[0010] The display panel includes a TFT screen and a TFT driver chip, which is used to convert the received driving signal from the OLED screen into a driving signal for the TFT screen, and to drive the TFT screen to perform the display operation corresponding to the driving signal of the OLED screen.

[0011] In one example, the TFT driver chip may include:

[0012] The MIPI parsing module is used to filter out the driving signal of the OLED screen and write it into the buffer for parameter conversion to obtain the driving signal of the TFT screen.

[0013] An image processing module, connected to the MIPI parsing module, is used to correct and adaptively adjust the driving signal of the TFT screen in order to optimize the color and compensate the brightness of the driving signal of the TFT screen.

[0014] The backlight control module, connected to the MIPI parsing module, is used to compare the driving signal of the TFT screen with the data pre-stored in the lookup table, and output brightness control based on the comparison result.

[0015] In one example, the driving signal for the TFT screen may include a PWM control signal.

[0016] In one example, the TFT driver chip may further include: an interface processing module for performing interface type conversion based on the interface types of the MIPI parsing module, the image processing module, and the backlight control module.

[0017] In one example, the interface type may include a standard four-channel high-speed serial MIPIDSI interface, LVDS interface, SPI interface, or I2C interface.

[0018] In one example, the TFT driver chip may further include a voltage management module for providing different voltage outputs according to the voltage specifications of each module in the TFT driver chip.

[0019] In one example, the MIPI parsing module performs instruction filtering on the driving signal of the OLED screen.

[0020] Thirdly, based on the same concept, this utility model also provides a mobile phone terminal, which may specifically include the display system described above.

[0021] Compared with the prior art, the present invention has at least the following technical effects:

[0022] On the one hand, a novel TFT driver chip and display system are proposed, including a MIPI resolution module, an image processing module, and a backlight control module, to convert the driving signals of the OLED screen into driving signals of the TFT screen. This allows for the replacement of the OLED screen with a TFT screen without changing the display panel itself, ensuring normal display and reducing the maintenance or replacement costs of the OLED screen. On the other hand, because the TFT driver chip provided by this invention includes a backlight control module, it compensates for the reliance on external backlighting for TFT screens, further reducing the maintenance or replacement costs of OLED screens. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the following detailed description to explain the present application, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a circuit structure block diagram of the TFT driver chip provided in the embodiments of this utility model.

[0025] Figure 2 As an embodiment of this utility model Figure 1 The provided circuit structure block diagram shows the functional module schematic of the TF driver chip.

[0026] Figure 3 This is a partial structural diagram of the display system provided in the embodiment of this utility model.

[0027] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale. Detailed Implementation

[0028] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0029] It should be noted that the illustrations provided in this embodiment are merely schematic representations of the basic structure of this utility model. That is, the illustrations only show components relevant to this utility model and are not drawn according to the actual number, state, and size of components in implementation. In actual implementation, the type, quantity, and proportion of each component can be arbitrarily changed, and the component layout may be more complex. Therefore, the following description should be understood as being common knowledge to those skilled in the art and is not intended to limit this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center", "middle", "outer periphery", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device, graphic, material layer or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the following embodiments, abbreviations and key terms are defined as follows:

[0032] MIPI stands for Mobile Industry Processor Interface. MIPI is an open standard and specification for mobile application processors, initiated by the MIPI Alliance. MIPI Filter: A filtering instruction based on MIPI, functionally similar to a filter, but implemented with instructions.

[0033] Please see Figure 1 and Figure 2 ,in Figure 1 This is a circuit structure block diagram of the TFT driver chip provided in the embodiments of this utility model. Figure 2 As an embodiment of this utility model Figure 1 The provided circuit block diagram shows the functional module schematic of the TFT driver chip. Figure 1 and Figure 2 As shown, the TFT driver chip provided by this utility model may specifically include: a MIPI resolution module, an image processing module, a backlight control module, an interface processing module, a voltage management module, a timing control module, and an internal register or OTP.

[0034] As an example, the MIPI parsing module is connected to the interface processing module, i.e., a communication connection. The interface processing module can communicate with the motherboard of a terminal device, such as a mobile phone terminal, to receive various operation commands, such as display commands, sent by the motherboard of the terminal device. The image processing module and the backlight control module are also communicated with the MIPI parsing module, respectively. In this embodiment, the terminal device can be a mobile phone terminal. An OLED control board is provided on the motherboard, and the display panel includes a TFT screen and a TFT driver chip for driving the TFT screen. When a user of the mobile phone terminal touches the TFT screen, the detection device of the TFT screen (not shown) detects the touch information and converts it into touch point coordinates. These coordinates are then sent to the controller of the mobile phone terminal, i.e., the OLED control board, through the interface processing module in the TFT driver chip. The OLED control board determines whether to perform a display operation or another command operation based on the touch information. In this process, the interface processing module is mainly used to convert the interface types according to the interface types of the MIPI parsing module, the image processing module, and the backlight control module. This ensures that the functional modules in the TFT driver chip can seamlessly interface with the components in the terminal device, such as the OLED control board in a mobile phone terminal motherboard. It also reserves programmable interfaces to adapt to different device requirements, facilitating rapid replacement and subsequent upgrades during maintenance. Preferably, the interface types that the interface processing module can handle may include a standard four-channel high-speed serial MIPI DSI interface, an LVDS interface, an SPI interface, or an I2C interface, but are not limited to these.Specifically, after receiving the OLED screen drive signal (e.g., image and brightness adjustment signals) from the OLED control board on a terminal device such as a mobile terminal via the interface processing module, the MIPI parsing module can filter the OLED screen drive signal using instruction filtering and preliminary conversion to remove noise and ensure the accuracy of subsequent conversion work. Then, it sends the signal to the image processing module, which then corrects and adaptively adjusts the TFT screen drive signal. For example, it converts various parameters in the OLED screen drive signal that are only processed by the OLED screen into a drive signal suitable for the TFT screen, such as a PWM control signal. Finally, it uses calibration data stored in an internal register or OTP in the TFT drive signal to adaptively adjust the conversion result, for example, by adjusting... The driving signal of the TFT screen is optimized for color and brightness compensation to adapt to the needs of different mobile phone models. The backlight control module, connected to the MIPI resolution module, compares the driving signal of the TFT screen with the data pre-stored in the lookup table, and outputs brightness control based on the comparison result. For example, the backlight can be controlled by PWM or other modulation methods to ensure that the overall display brightness and visual effect of the replaced TFT screen are close to the original OLED screen of the mobile phone terminal. The voltage management module can be connected to multiple parts of the TFT driver chip, such as the MIPI resolution module, image processing module and backlight control module, respectively, to provide different voltage outputs according to the voltage specifications of each module in the TFT driver chip, while realizing overvoltage, overcurrent and electrostatic protection to ensure that the chip operates safely and reliably in various working environments.

[0035] Furthermore, the TFT driving chip of this utility model may also include other functional modules or circuits for normal communication between the mobile phone motherboard and the TFT screen, such as setting and detection circuits (or modules), oscillator circuits (or modules), grayscale power supply adjustment (modules), source drive (modules), etc., and is not limited thereto.

[0036] Please see Figure 3 , Figure 3 This is a partial structural diagram of the display system provided in an embodiment of the present utility model. For example... Figure 3As shown, the display system provided by this utility model may specifically include an OLED control board and a display panel. The OLED control board is located on the mobile phone motherboard and is used to send OLED screen driving signals to the display panel. The display panel is communicatively connected to the OLED control board and may specifically include a TFT screen and a TFT driver chip, used to convert the received OLED screen driving signals into TFT screen driving signals, and to drive the TFT screen to perform the display operation corresponding to the OLED screen driving signals. The TFT driver chip may include: a MIPI parsing module, an image processing module, a backlight control module, an interface processing module, a voltage management module, timing control, and internal registers or OTP. As an example, its working principle is as follows: when a mobile phone terminal user touches the TFT screen, the TFT screen's detection device detects the touch information and converts it into touch point coordinates. These coordinates are then sent to the mobile phone terminal's controller, i.e., the OLED control board, through the interface processing module in the TFT driver chip. The OLED control board determines whether to perform a display operation or another instruction operation based on the touch information. In this process, the interface processing module is mainly used to convert the interface types according to the interface types of the MIPI parsing module, the image processing module, and the backlight control module. This ensures that the functional modules in the TFT driver chip can seamlessly interface with the components in the terminal device, such as the OLED control board in a mobile phone terminal motherboard. It also reserves programmable interfaces to adapt to different device requirements, facilitating rapid replacement and subsequent upgrades during maintenance. Preferably, the interface types that the interface processing module can handle may include a standard four-channel high-speed serial MIPI DSI interface, an LVDS interface, an SPI interface, or an I2C interface, but are not limited to these.Specifically, after receiving the OLED screen drive signal (e.g., image and brightness adjustment signals) from the OLED control board on a terminal device such as a mobile terminal via the interface processing module, the MIPI parsing module can filter the OLED screen drive signal using instruction filtering and preliminary conversion to remove noise and ensure the accuracy of subsequent conversion work. Then, it sends the signal to the image processing module, which then corrects and adaptively adjusts the TFT screen drive signal. For example, it converts various parameters in the OLED screen drive signal that are only processed by the OLED screen into a drive signal suitable for the TFT screen, such as a PWM control signal. Finally, it uses calibration data stored in an internal register or OTP in the TFT drive signal to adaptively adjust the conversion result, for example, by adjusting... The driving signal of the TFT screen is optimized for color and brightness compensation to adapt to the needs of different mobile phone models. The backlight control module, connected to the MIPI resolution module, compares the driving signal of the TFT screen with the data pre-stored in the lookup table, and outputs brightness control based on the comparison result. For example, the backlight can be controlled by PWM or other modulation methods to ensure that the overall display brightness and visual effect of the replaced TFT screen are close to the original OLED screen of the mobile phone terminal. The voltage management module can be connected to multiple parts of the TFT driver chip, such as the MIPI resolution module, image processing module and backlight control module, respectively, to provide different voltage outputs according to the voltage specifications of each module in the TFT driver chip, while realizing overvoltage, overcurrent and electrostatic protection to ensure that the chip operates safely and reliably in various working environments.

[0037] Furthermore, this utility model embodiment may also provide a mobile phone terminal, wherein the mobile phone terminal may include the above-mentioned features. Figure 3 The display system shown may include, for example, the display system shown. Figure 1 and Figure 2 The TFT driver chip shown is not limited to this.

[0038] It should be understood that the methods and working principles involved in this utility model are all existing technologies.

[0039] In summary, on the one hand, a novel TFT driver chip and display system are proposed, including a MIPI resolution module, an image processing module, and a backlight control module, to convert the driving signals of the OLED screen into driving signals of the TFT screen. This allows for the replacement of the OLED screen with a TFT screen without changing the display panel itself, ensuring normal display and reducing the maintenance or replacement costs of the OLED screen. On the other hand, because the TFT driver chip provided by this invention includes a backlight control module, it compensates for the reliance on external backlighting for TFT screens, further reducing the maintenance or replacement costs of OLED screens.

[0040] The above-described embodiments of the present invention are combinations of elements and features of the present invention. Unless otherwise stated, the elements or features described are optional. Individual elements or features may be practiced without combination with other elements or features. Furthermore, embodiments of the present invention may be constructed by combining some elements and / or features. The order of operations described in the embodiments of the present invention may be rearranged. Some constructions of any embodiment may be included in another embodiment and may be replaced by corresponding constructions of another embodiment. It will be apparent to those skilled in the art that claims in the appended claims that are not explicitly referenced in each other may be combined into embodiments of the present invention, or may be included as new claims in modifications made after the filing of this invention.

[0041] In firmware or software configuration, the embodiments of this utility model can be implemented in the form of modules, processes, functions, etc. Software code can be stored in a memory unit and executed by a processor. The memory unit is located inside or outside the processor and can send data to and receive data from the processor via various known means.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention will not be limited to the embodiments shown herein, but is accorded the widest scope consistent with the principles and novel features disclosed herein.

[0043] Apart from the technical features described in the specification, the other technical features are known to those skilled in the art. To highlight the innovative features of this utility model, the other technical features will not be repeated here.

Claims

1. A TFT driver chip, characterized in that, include: The MIPI parsing module is used to filter out the driving signals of the OLED screen and write them into the buffer for parameter conversion to obtain the driving signals of the TFT screen. An image processing module, connected to the MIPI parsing module, is used to correct and adaptively adjust the driving signal of the TFT screen in order to optimize the color and compensate the brightness of the driving signal of the TFT screen. The backlight control module, connected to the MIPI parsing module, is used to compare the driving signal of the TFT screen with the data pre-stored in the lookup table, and output brightness control based on the comparison result.

2. The TFT driver chip as described in claim 1, characterized in that, The driving signals for the TFT screen include PWM control signals.

3. A display system, characterized in that, include: OLED control board and display panel; among which, The OLED control board is located on the mobile phone motherboard and is used to send driving signals for the OLED screen to the display panel. The display panel includes a TFT screen and a TFT driver chip, which is used to convert the received driving signal from the OLED screen into a driving signal for the TFT screen, and to drive the TFT screen to perform the display operation corresponding to the driving signal of the OLED screen.

4. The display system as described in claim 3, characterized in that, The TFT driver chip includes: The MIPI parsing module is used to filter out the driving signal of the OLED screen and write it into the buffer for parameter conversion to obtain the driving signal of the TFT screen. An image processing module, connected to the MIPI parsing module, is used to correct and adaptively adjust the driving signal of the TFT screen in order to optimize the color and compensate the brightness of the driving signal of the TFT screen. The backlight control module, connected to the MIPI parsing module, is used to compare the driving signal of the TFT screen with the data pre-stored in the lookup table, and output brightness control based on the comparison result.

5. The display system as described in claim 3, characterized in that, The driving signals for the TFT screen include PWM control signals.

6. The display system as described in claim 4, characterized in that, The TFT driver chip further includes an interface processing module, used to perform interface type conversion based on the interface types of the MIPI parsing module, the image processing module, and the backlight control module.

7. The display system as described in claim 6, characterized in that, The interface types include a standard four-channel high-speed serial MIPI DSI interface, LVDS interface, SPI interface, or I2C interface.

8. The display system as described in claim 3, characterized in that, The TFT driver chip further includes a voltage management module, used to provide different voltage outputs according to the voltage specifications of each module in the TFT driver chip.

9. The display system as described in claim 4, characterized in that, The MIPI parsing module performs instruction filtering on the driving signals of the OLED screen.

10. A mobile terminal, characterized in that, The display system comprising any one of claims 3 to 9.

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