Driving device, method for eliminating single-ended signal reflection of panel, and display device

A driving device and signal technology, applied in static indicators, instruments, etc., can solve the problem that the flexible flat cable cannot meet the impedance matching of single-ended signals and differential signals at the same time, and achieve the effect of solving impedance matching and eliminating signal reflection

Active Publication Date: 2022-05-10
HKC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present application provides a driving device, a method for eliminating single-ended signal reflection on a panel, and a display device, which can solve the problem that the flexible flat cable cannot satisfy the impedance matching of single-ended signals and differential signals at the same time

Method used

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  • Driving device, method for eliminating single-ended signal reflection of panel, and display device
  • Driving device, method for eliminating single-ended signal reflection of panel, and display device
  • Driving device, method for eliminating single-ended signal reflection of panel, and display device

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Embodiment 1

[0031] The embodiment of the present application provides a driving device, see figure 1 As shown, the driving device includes: a timing controller 10, a flash memory chip 20, and a signal transmission line 30 arranged between the timing controller 10 and the flash memory chip 20. The signal rise time of the signal sent by the timing controller 10 is shorter than that of the signal passing through the signal transmission line 30. The required time, thereby eliminating the signal reflection problem that occurs during signal transmission.

[0032] In this embodiment, a safe signal rise time is calculated by the timing controller 10 according to its future actual application distance. At this time, the signal rise time of the signal sent by the timing controller 10 is less than the required time for the signal to pass through the signal transmission line 30 Time, so as to ensure that the signal reflection is within a reasonable range. For example, T is the signal rise time, L is ...

Embodiment 2

[0034] In Example 2, see figure 2 As shown, each signal transmission line 30 is connected to a ground capacitor 40 , the first end of the ground capacitor 40 is connected to the signal transmission line 30 , and the second end of the ground capacitor 40 is grounded.

[0035] In this embodiment, since the signal will have impedance changes on the transmission medium, for example, the signal output from the timing controller 10 is transmitted from the PCBA of the control board to the flexible flat cable, and finally transmitted to the PCBA of the connection board through the flexible flat cable. During the transmission process, the signal will go through different media, and different transmission media will cause the reflection of the signal. Therefore, for the signal reflection caused by the change of the impedance of different media, a capacitance 40 to the ground is added to each signal transmission line to eliminate the signal caused by the impedance change. Signal reflect...

Embodiment 3

[0044] In this embodiment, the flash memory chip 20 is connected to the signal transmission line 30 through the serial peripheral interface 21 .

[0045] A serial peripheral interface (Serial Peripheral Interface, SPI) is a synchronous peripheral interface, which enables the flash memory chip 20 to communicate with various peripheral devices in a serial manner to exchange information. The SPI system can directly interface with a variety of standard peripheral devices produced by various manufacturers, and it only needs 4 lines: serial clock line (SCK), master input / slave output data line (MISO), master output / slave input data line (MOSI) and active-low slave select line (NSS).

[0046]In one embodiment, the flash memory chip 20 is used for storing signal compensation data, and the signal compensation data is used for compensating the data signal output by the timing controller.

[0047] In this embodiment, due to the problem of uneven display in the display device, a calibrat...

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Abstract

This application is applicable to the technical field of panel driving, and provides a driving device, a method for eliminating single-ended signal reflection of a panel, and a display device, wherein the driving device includes: a timing controller, a flash memory chip, and a timing controller and a display device. The signal transmission line between the above-mentioned flash memory chips, the signal rise time of the signal sent by the timing controller is shorter than the time required for the signal to pass through the signal transmission line, thereby eliminating the signal reflection problem during the signal transmission process, which can solve the problem that the flexible flat cable cannot be connected at the same time To meet the impedance matching problem of single-ended signal and differential signal.

Description

technical field [0001] The present application belongs to the technical field of panel driving, and in particular relates to a driving device, a method for eliminating single-end signal reflection of a panel, and a display device. Background technique [0002] At present, in the LCD drive system, in order to solve the problem of panel display unevenness, a calibrating and calibrating flash memory (flash) is usually added, and the calibration data is stored in the flash memory to perform impedance correction on the digital signal. The serial peripheral interface (Serial Peripheral Interface, SPI) interface is adopted, and the clock signal of the flash is a single-ended digital signal, and the single-ended digital signal needs to be impedance matched. The signal types output by the timing controller (Timing Controller, TCON) are divided into two types, single-ended TTL signal and differential data signal. The output impedance of the output single-ended TTL signal pin in the TC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/36
CPCG09G3/36
Inventor 陈伟袁海江
Owner HKC CORP LTD
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