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Data line driving unit, display system and gray-scale-related far-end auxiliary driving method

A technology for driving units and data lines, applied in the field of display technology applications, can solve problems such as limiting the allowable time

Active Publication Date: 2021-08-03
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increase in display resolution and frame rate greatly limits the allowable time

Method used

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  • Data line driving unit, display system and gray-scale-related far-end auxiliary driving method
  • Data line driving unit, display system and gray-scale-related far-end auxiliary driving method
  • Data line driving unit, display system and gray-scale-related far-end auxiliary driving method

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Experimental program
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Embodiment 1

[0029] Such as figure 1 Shown is the circuit structure of the data line driving unit of this embodiment, which includes a voltage buffer 533 , a data line 21 , an NMOS transistor 603 and a PMOS transistor 703 .

[0030] The voltage buffer 533 is connected to the near end of the data line 21 for receiving the display signal and outputting it to the data line 21 . The four resistors R used in this embodiment L / 4 and three capacitors C L The data line 21 (3T wiremodel of data line) of the 3T wire model represented by / 3 is very suitable for the driving method of the present invention to analyze the driving method of the gray-scale correlation remote auxiliary fast data line driving from the two ends of the data line to the data line . V D (t) is the target display voltage from the DAC output; V O (t) is the voltage at the output of the voltage buffer; R L and C L are the parasitic resistance and capacitance of the data line, respectively.

[0031] The source of the NMOS ...

Embodiment 2

[0036] Such as figure 2 Shown is the circuit structure of the data line driving unit of this embodiment, which includes a voltage buffer module 53 , a data line 21 , and a remote auxiliary driving module 54 .

[0037] The voltage buffer module 53 includes a third level shifter 531, a digital-to-analog converter 532 and a voltage buffer 533 connected in sequence, and the voltage buffer 533 is connected to the near end of the data line 21, and the third level shifter 531 is used for receiving The digital display signal is boosted by the third level shifter 531 , converted into an analog display signal by the digital-to-analog converter 532 and then output to the data line 21 by the voltage buffer 533 . The four resistors R used in this embodiment L / 4 and three capacitors C L The data line 21 of the 3T wire model represented by / 3 is very suitable for the analysis of the driving method of the present invention for driving the data line from both ends of the gray-scale correla...

Embodiment 3

[0047] Such as image 3 Shown is the AMOLED display system adopting the gray-scale correlation remote auxiliary fast data line driving method of this embodiment, including a first driving unit 31, a display panel 20 (Large AMOLED display panel), a second driving unit 32 and a display controller 10 (Display controller), the first drive unit 31 and the second drive unit 32 are arranged on opposite sides of the display panel 20, and M columns of drive channels are formed between the first drive unit 31, the display panel 20 and the second drive unit 32, Figure 4 It is a schematic diagram showing the circuit structure of two adjacent columns of driving channels in the system. The display panel 20 includes M columns of data lines 21 corresponding to the M columns of driving channels, and the data lines 21 are connected to their corresponding pixel units. Specifically, in this embodiment, the first driving unit 31 is a top driving unit disposed on the top of the display panel; the...

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Abstract

The invention provides a data line driving unit, a display system and a gray-scale-related far-end auxiliary driving method. The data line driving unit comprises a voltage buffer, a data line, an NMOS transistor and a PMOS transistor, wherein the display system comprises a first driving unit, a display panel, a second driving unit and a display controller; and M columns of driving channels are formed among the first driving unit, the display panel and the second driving unit. According to the data line driving unit, the display system and the gray-scale-related far-end auxiliary driving method, the technical scheme that driving is started at the near end and the far end of a data line at the same time is adopted, the near end is driven by a traditional voltage buffer, the far end is driven by a high-voltage PMOS transistor or an NMOS transistor which is completely conducted, and the continuous period is controlled by p_pulse or n_pulse; and the advantages of voltage pre-emphasis, gray correlation and two-end driving methods are combined, and the system has better performance.

Description

technical field [0001] The invention relates to the application field of display technology, in particular to a data line drive unit, a display system, and a grayscale-related remote auxiliary drive method. Background technique [0002] The display signal driver is one of the most important components in an AMOLED (Active Matrix Organic Light Emitting Diodes, Active Matrix Organic Light Emitting Diodes) display system. The display signal driver is used to accurately drive (charge or discharge) the data line to a target display voltage according to the input display data. This display voltage is programmed into selected pixel cells to drive the OLED to emit light. The data lines all have resistive and capacitive parasitic loads, and the display signal driver needs to spend a certain amount of time driving the data lines so that the voltage of the data lines is close enough to the final target display voltage. With the development of display technology, the physical size of ...

Claims

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Application Information

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IPC IPC(8): G09G3/3225G09G3/3291
CPCG09G3/3225G09G3/3291
Inventor 林兴武张盛东焦海龙张敏
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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