Interface conversion circuit, display panel driving method and display apparatus

• US 10,447,964 B2
• Filed: 06/23/2014
• Issued: 10/15/2019
• Est. Priority Date: 01/22/2014
• Status: Active Grant

• Current Assignee: Beijing BOE Display Technology Co Ltd (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Guo, Luqiang, He, Zongze, Hu, Weihao
• Primary Examiner(s): Sarma, Abhishek
• Application Number:
  US14/429,120
• Publication Number:
  US 20150381928A1
• Time in Patent Office: 1,940 Days
• CPC Class Codes: G09G 2370/10 Use of a protocol of communication by packets in interfaces along the display data pipeline
• CPC Class Codes: G09G 2370/14 Use of low voltage differential signaling [LVDS] for display data communication
• CPC Class Codes: G09G 2370/20 Details of the management of multiple sources of image data
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 5/005 Adapting incoming signals to the display format of the display terminal
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 7/01 Conversion of standards , e.g. involving analogue television standards or digital television standards processed at pixel level
• CPC Class Codes: H04N 7/0125 one of the standards being a high definition standard

Abstract

An interface conversion circuit, a display panel driving method and a display apparatus for realizing UHD image display at least by a LVDS interface together with an UHD display apparatus are provided. The interface conversion circuit comprises a low voltage differential signaling (LVDS) interface and a data format conversion module. The LVDS interface is configured to receive a LVDS signal from a LVDS signal source and transmit the LVDS signal to the data format conversion module. The data format conversion module is configured to convert the received LVDS signal into a digital video interface eDP signal.

Claims

1. An interface conversion circuit comprising a low voltage differential signaling (LVDS) interface, a digital video (eDP) interface, a timing controller and a data format conversion module, wherein

the LVDS interface is configured to receive a LVDS signal from a LVDS signal source and transmit the LVDS signal to the data format conversion module;

the eDP interface is configured to receive a first eDP signal from an eDP signal source and to transmit the first eDP signal to the timing controller;

the data format conversion module is configured to convert the received LVDS signal into a second eDP signal and to transmit the second eDP signal to the timing controller; and

the timing controller is configured to receive the first eDP signal from the eDP interface or the second eDP signal from the data format conversion module.

2. The interface conversion circuit according to claim 1, wherein the data format conversion module at least comprises a first data format converter and a second data format converter;

the first data format converter is configured to convert the LVDS signal into a transistor-transistor logic level (TTL) signal; and

the second data format converter is configured to convert the TTL signal into the second eDP signal.

3. The interface conversion circuit according to claim 1, further comprising a switch module whose first input terminal is connected to the data format conversion module, whose second input terminal is connected to the eDP interface, and whose output terminal is connected to the timing controller, wherein the switch module is configured to control the first eDP signal from the eDP interface or the second eDP signal from the data format conversion module to be output to the timing controller according to a control signal.

4. The interface conversion circuit according to claim 3, further comprising a controller connected to the switch module, wherein the controller is configured to control the switch module to output the second eDP signal from the data format conversion module when receiving a first control signal and to control the switch module to output the first eDP signal from the eDP interface when receiving a second control signal.

5. The interface conversion circuit according to claim 3, further comprising a controller connected to the switch module and a control interface connected to the controller, wherein

the controller is configured to control the switch module to output the second eDP signal from the data format conversion module when receiving a first control signal from the control interface and to control the switch module to output the first eDP signal from the eDP interface when receiving a second control signal from the control interface.

6. The interface conversion circuit according to claim 3, further comprising a controller connected to the switch module, wherein a first input terminal of the controller is connected to the LVDS interface, and a second input terminal of the controller is connected to the eDP interface;

and

the controller is configured to control the switch module to output the second eDP signal from the data format conversion module when receiving a first control signal from the LVDS interface and to control the switch module to output the first eDP signal from the eDP interface when receiving a second control signal from the eDP interface.

7. A display apparatus comprising an interface conversion circuit and a display panel comprising a timing controller, wherein the interface conversion circuit is an interface conversion circuit comprising a low voltage differential signaling (LVDS) interface, a digital video (eDP) interface, a timing controller and a data format conversion module, wherein

the LVDS interface is configured to receive a LVDS signal from a LVDS signal source and transmit the LVDS signal to the data format conversion module;

the eDP interface is configured to receive a first eDP signal from an eDP signal source and to transmit the first eDP signal to the timing controller;

the data format conversion module is configured to convert the received LVDS signal into a second eDP signal and to transmit the second eDP signal to the timing controller; and

the timing controller is configured to receive the first eDP signal from the eDP interface or the second eDP signal from the data format conversion module.

8. The display apparatus according to claim 7, wherein the data format conversion module at least comprises a first data format converter and a second data format converter;

the first data format converter is configured to convert the LVDS signal into a transistor-transistor logic level (TTL) signal; and

the second data format converter is configured to convert the TTL signal into the second eDP signal.

9. The display apparatus according to claim 7, further comprising a switch module whose first input terminal is connected to the data format conversion module, whose second input terminal is connected to the eDP interface, and whose output terminal is connected to the timing controller, wherein the switch module is configured to control the first eDP signal from the eDP interface or the second eDP signal from the data format conversion module to be output to the timing controller according to a control signal.

10. The display apparatus according to claim 9, further comprising

a controller connected to the switch module, wherein the controller is configured to control the switch module to output the second eDP signal from the data format conversion module when receiving a first control signal and to control the switch module to output the first eDP signal from the eDP interface when receiving a second control signal.

11. The display apparatus according to claim 9, further comprising a controller connected to the switch module and a control interface connected to the controller, wherein

the controller is configured to control the switch module to output the second eDP signal from the data format conversion module when receiving a first control signal from the control interface and to control the switch module to output the first eDP signal from the eDP interface when receiving a second control signal from the control interface.

12. The display apparatus according to claim 9, further comprising

a controller connected to the switch module, wherein a first input terminal of the controller is connected to the LVDS interface, and a second input terminal of the controller is connected to the eDP interface;

and

the controller is configured to control the switch module to output the second eDP signal from the data format conversion module when receiving a first control signal from the LVDS interface and to control the switch module to output the first eDP signal from the eDP interface when receiving a second control signal from the eDP interface.