A pixel driving structure and driving method of a shared data line

Abstract

The present invention provides a pixel driving structure with a shared data line and a driving method thereof, wherein the structure comprises a plurality of data lines arranged along a first direction, a plurality of scan lines arranged along a second direction, and a plurality of sub-pixels, wherein each pixel unit comprises a pixel driving circuit and two LEDs; in two adjacent pixel units, the second sub-pixel of the previous pixel unit and the first sub-pixel of the next pixel unit share a data line, and the number of data lines is reduced by N / 2-1, where N is an integer, so that wiring congestion in a binding area can be reduced. The present invention uses a pixel structure with a shared data lead and a periodic circuit time-sharing drive, thereby effectively reducing the number of data leads to reduce the cost of a driver IC without increasing the number of scan lines.

Description

Technical Field

[0001] The present invention relates to the field of pixel driving technology, and in particular to a pixel driving structure and a driving method thereof that share a data line. Background Art

[0002] Micro-LED refers to LEDs that are micron-sized (generally less than 50μm) by miniaturizing traditional LEDs. They can realize display arrays with ultra-high density pixel resolution. Micro-LEDs have the characteristics of self-luminescence. Compared with OLEDs, Micro-LED colors are easier to accurately adjust, have longer luminous life and higher brightness, and are small, thin and light-weight with low cost, making Micro-LEDs an ideal choice for micro-display applications. Micron-level or even nano-level LED arrays are the only high-efficiency, low-power devices that can integrate driving, luminescence, and signal transmission, and realize ultra-large-scale integrated light-emitting units. They combine the two major technical features of LCD and OLED, and their product performance is much higher than the current thin film transistor (TFT)-LCD (TFT-LCD) or OLED, and their application areas are also more extensive.

[0003] The core technology of Micro-LED lies in the transfer and bonding of LED chips in tiny sizes. At the same time, in order to achieve color display, a huge amount of three discrete μLED devices need to be transferred to the same driver substrate. The transfer rate and yield during the transfer process are the technical bottlenecks for realizing the industrialization of Micro-LED. At the same time, in order to achieve high-resolution Micro-LED display, it means more pixels and signal routing designs. For the driver IC, more signal output channels need to be designed, which will lead to an increase in IC cost and a larger volume. In view of this, a dual-gate panel came into being, but the data lines under this architecture are halved, while the scan lines are doubled, resulting in an increase in cost. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a pixel driving structure and a driving method thereof for sharing data lines, without increasing the number of scan lines, thereby reducing the number of data leads and lowering the cost of the driver IC.

[0005] To achieve the above object, the present invention adopts the following technical solution: a pixel driving structure with a shared data line, comprising:

[0006] A plurality of data lines are arranged along a first direction;

[0007] A plurality of scanning lines arranged along a second direction;

[0008] A plurality of pixel units are arranged periodically or non-periodically along the first direction and the second direction;

[0009] Each pixel unit includes a pixel driving circuit and two sub-pixels;

[0010] In two adjacent pixel units arranged along the second direction, the second sub-pixel of the previous pixel unit and the first sub-pixel of the next pixel unit share a data line.

[0011] In a preferred embodiment, in each pixel unit, a pixel driving circuit is used to drive a sub-pixel.

[0012] In a preferred embodiment, in the pixel units arranged along the second direction, in the first pixel unit, the first sub-pixel is controlled by the first data line in the first direction and the first scan line in the second direction; the second sub-pixel is controlled by the second data line in the first direction and the first scan line in the second direction; in the second pixel unit, the first sub-pixel is controlled by the second data line in the first direction and the first scan line in the second direction, and the second sub-pixel is controlled by the third data line in the first direction and the first scan line in the second direction.

[0013] The present invention also provides a driving method for a pixel driving structure with a shared data line, which adopts a time-sharing driving method or a sub-frame driving method according to the persistence of vision effect of human eyes.

[0014] In a preferred embodiment, the time-sharing driving or sub-frame driving method divides the display period into two sub-periods, drives one sub-pixel of the pixel unit in the first sub-period, and drives the other sub-pixel of the pixel unit in the second sub-period.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention adopts a scheme that two sub-pixels in the middle adjacent pixel unit share one data line except that the first and last sub-pixels use data lines separately, thereby reducing the use of data lines. The two LEDs sharing the data line are periodically driven by a time-sharing drive or a sub-frame drive method, and the visual persistence effect of the human eye is utilized, without affecting the display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial structural schematic diagram of a preferred embodiment of the present invention;

[0018] Figure 2 FIG. 4 is a working timing diagram of a pixel driving structure according to a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application; as used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations.

[0022] A pixel driving structure and driving method of a shared data line, referring to Figure 1 , the device structure can be expanded according to the rule of pixel structure to realize display devices of various resolutions. In this embodiment, the device structure includes three data lines, one scan line and two pixel units. The three data lines are arranged along the first direction R1, the one scan line is arranged along the second direction R2, and the two pixel units are arranged along the first direction. The first direction R1 is different from the second direction R2. Figure 1 As shown, the first pixel unit includes a first sub-pixel and a second pixel, the first pixel includes a first drive circuit and a first LED, and the second pixel includes a second drive circuit and a second LED. The first LED is electrically coupled to the first drive circuit, and the first drive circuit is electrically coupled to the scan line and the first data line. The second LED is electrically coupled to the second drive circuit, and the second drive circuit is electrically coupled to the scan line and the second data line. The second pixel unit includes a third sub-pixel and a fourth sub-pixel, the third sub-pixel includes a third drive circuit and a third LED, and the fourth sub-pixel includes a fourth drive circuit and a fourth LED. The third LED is electrically coupled to the fourth drive circuit, and the third drive circuit is electrically coupled to the scan line and the second data line. The fourth LED is electrically coupled to the fourth drive circuit, and the fourth drive circuit is electrically coupled to the scan line and the third data line.

[0023] The first driving circuit is connected to the first data line and the first scanning line respectively, and is used for driving the first LED according to the data signal of the first data line under the control of the first scanning line.

[0024] The second driving circuit is connected to the second data line and the first scanning line respectively, and is used for driving the second LED according to the data signal of the second data line under the control of the first scanning line.

[0025] The third driving circuit is connected to the second data line and the first scanning line respectively, and is used for driving the third LED according to the data signal of the second data line under the control of the first scanning line.

[0026] The fourth driving circuit is connected to the third data line and the first scan line respectively, and is used for driving the fourth LED according to the data signal of the third data line under the control of the first scan line.

[0027] The first LED and the fourth LED are the first and last LEDs respectively, so separate data lines are used. Optionally, the first LED to the fourth LED may be an organic light emitting diode OLED, a micro light emitting diode micro LED or a sub-millimeter light emitting diode miniLED.

[0028] The time-sharing driving or sub-frame driving method divides the display period into two sub-periods, drives one LED of the pixel unit in the first sub-period, and drives the other LED of the pixel unit in the second sub-period. It is assumed that the voltage polarity applied to the scanning line in the two sub-periods is opposite, and the two LEDs sharing the data line are connected in opposite ways.

[0029] Assume that the voltage required to drive each LED is 1V, such as Figure 2 As shown, the first sub-period of the scan line inputs a 1 / 2V voltage, and the first sub-period of the data line inputs a -1 / 2V voltage, so the voltage between the scan line and the data line is 1V, so that the positively connected LED is turned on and emits light, and the reversely connected LED does not emit light. The input voltage of the second sub-period of the scan line is -1 / 2V, and the input voltage of the second sub-period of the data line is -3 / 2V. Therefore, in the second sub-period, the voltage between the scan line and the data line is -1V, so in the second sub-period, the positively connected LED does not emit light, and the reversely connected LED is turned on and emits light.

[0030] The phenomenon of persistence of vision is that the visual effect produced by light on the retina remains for a period of time after the light stops acting on it. Therefore, by using time-sharing drive or sub-frame drive method in the pixel drive circuit, the effect of continuous light emission of two adjacent LEDs can be obtained, thereby not affecting the display effect.

[0031] The present invention realizes that one pixel unit contains two sub-pixels, and the two sub-pixels in the same pixel unit are independently controlled without affecting each other. Two adjacent pixel units share a data line in the middle, reducing the use of data lines. At the same time, through the time-sharing drive or sub-frame drive method, the panel structure of double gates or double scanning lines is avoided, reducing the cost of integrated circuits (ICs).

[0032] The embodiments of the present invention do not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A pixel driving structure with a shared data line, characterized in that: include: A plurality of data lines are arranged along a first direction; A plurality of scanning lines are arranged along a second direction; A plurality of pixel units are arranged periodically or non-periodically along the first direction and the second direction; Each pixel unit includes a pixel driving circuit and two sub-pixels; In two adjacent pixel units arranged along the second direction, the second sub-pixel of the previous pixel unit and the first sub-pixel of the next pixel unit share a data line; In each pixel unit, a pixel driving circuit is used to drive a sub-pixel; The pixel units are arranged along the second direction, and in a first pixel unit, a first sub-pixel is controlled by a first data line in the first direction and a first scan line in the second direction; The second sub-pixel is controlled by the second data line in the first direction and the first scan line in the second direction; in the second pixel unit, the first sub-pixel is controlled by the second data line in the first direction and the first scan line in the second direction, and the second sub-pixel is controlled by the third data line in the first direction and the first scan line in the second direction.

2. A driving method for a pixel driving structure with a shared data line as claimed in claim 1, characterized in that: According to the persistence of vision effect of the human eye, a time-sharing driving method or a sub-frame driving method is adopted.

3. The driving method of a pixel driving structure with a shared data line according to claim 2, characterized in that: The time-sharing driving or sub-frame driving method divides the display period into two sub-periods, drives one sub-pixel of the pixel unit in the first sub-period, and drives the other sub-pixel of the pixel unit in the second sub-period.

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