Pixel structure of the display

Abstract

The present invention discloses a pixel structure of a display, comprising: a first pixel region; and a second pixel region adjacent to the first pixel region; wherein the first pixel region has a first DC residual electric field, the second pixel region has a second DC residual electric field, and the electric field directions of the first DC residual electric field and the second DC residual electric field are opposite to each other. The present invention achieves the reduction or elimination of residual ions accumulated between the insulating layer and the electrode through the alternating design of the electrode structure, thereby weakening or eliminating the ghosting phenomenon.

Description

Technical Field

[0001] The invention relates to a pixel structure of a display, and in particular to a pixel structure of a display for optimizing afterimage. Background Art

[0002] In recent years, with the innovation and development of display technology, the application scenarios of displays have become more and more diverse. In some application scenarios that require a long display of static images, an afterimage (Image-sticking) phenomenon will occur when the display switches the screen, affecting the display effect and the consumer's perception. The main reason for the afterimage phenomenon is the presence of parasitic capacitance in the thin film transistor (TFT) in the liquid crystal display drive circuit. If the voltage of the upper and lower plates of the liquid crystal is kept unchanged for a long time, the mobile ions remaining in the liquid crystal molecules tend to gather on the same side of the molecules in the same direction of the electric field, forming an internal electric field. When the screen of the liquid crystal display is switched from a high grayscale to a low grayscale, the internal electric field and the electric field of the upper and lower plates of the liquid crystal offset each other, making it impossible for the liquid crystal to reach the expected deflection angle, and finally producing an afterimage phenomenon. The parasitic capacitance of the liquid crystal panel is limited by the process structure, the thickness of the insulating layer deposition, and the different resistances will cause different parasitic capacitances, which are not easy to improve in the process.

[0003] In the prior art, the flicker value of the display screen of the liquid crystal display can be used as a standard to measure whether the current DC residual effect is serious. The reason is that the voltage difference between the positive and negative voltages of the AC drive and the common electrode voltage is not equal. If the data line is reversed in polarity, the brightness of the screen changes and the screen flickers. The degree of screen flicker depends on the flicker value. Therefore, the larger the flicker value, the more serious the DC residual effect. The flicker signal can be minimized to adjust the appropriate driving parameter voltage to reduce the accumulated residual charge of the panel and improve the problem of residual image. In addition, the liquid crystal panel will still have differences in loads between liquid crystal panels due to the drift of process errors, resulting in different feed-through voltages on the liquid crystal panel. If the known common voltage adjustment is used, uneven flickering will occur. In addition, the known method of using a variable resistor to adjust the common voltage requires the operator to visually adjust the flicker. However, the sensitivity of operators to flicker is different, resulting in different quality control standards for judging flicker, and the adjustment of the operator will cost a lot of manpower costs, resulting in uneven performance and quality and high cost.

[0004] Therefore, it is necessary to provide a pixel structure of a display to solve the problems existing in the prior art. Summary of the invention

[0005] In view of this, the present invention provides a pixel structure of a display to solve the problem of afterimage phenomenon caused by parasitic capacitance in liquid crystal displays in the prior art.

[0006] The main object of the present invention is to provide a pixel structure for a display, which can improve the problem of image sticking.

[0007] A secondary object of the present invention is to provide a pixel structure for a display, which can reduce or eliminate residual ions accumulated between an insulating layer and an electrode through an alternating design of a common electrode and a pixel electrode structure, thereby weakening or eliminating the image sticking phenomenon.

[0008] To achieve the foregoing objects of the present invention, an embodiment of the present invention provides a pixel structure for a display, comprising: a first pixel region, wherein the pixel structure in the first pixel region comprises: a first electrode; an insulating protective layer disposed on the first electrode; a second electrode disposed on the insulating protective layer; and an insulating layer disposed on the second electrode; and a second pixel region adjacent to the first pixel region, wherein the pixel structure in the second pixel region comprises the first electrode, the insulating protective layer, the second electrode and the insulating layer, wherein the insulating protective layer is disposed on the second electrode, the first electrode is disposed on the insulating protective layer, and the insulating layer is disposed on the first electrode; wherein the insulating layer in the first pixel region has a first ion polarity, the insulating layer in the second pixel region has a second ion polarity, the first ion polarity and the second ion polarity are opposite to each other, and a plurality of first ions with the first ion polarity and a plurality of second ions with the second ion polarity are redistributed, diffused or neutralized through the insulating layer.

[0009] In an embodiment of the present invention, the first ion polarity is negative, and the second ion polarity is positive.

[0010] In an embodiment of the present invention, the first electrode is a common electrode, and the second electrode is a pixel electrode.

[0011] In an embodiment of the present invention, the insulating layer in the first pixel region is in contact with the second electrode.

[0012] In an embodiment of the present invention, the insulating layer is a polyimide layer.

[0013] Furthermore, another embodiment of the present invention further provides a pixel structure for a display, comprising: a first pixel region; and a second pixel region adjacent to the first pixel region; wherein the first pixel region has a first DC residual electric field, the second pixel region has a second DC residual electric field, the first DC residual electric field and the second DC residual electric field have opposite electric field directions, and a plurality of first ions of the first DC residual electric field and a plurality of second ions of the second DC residual electric field are redistributed, diffused or neutralized through the insulating layer.

[0014] In an embodiment of the present invention, the pixel structure includes in the first pixel region: a first electrode; a second electrode disposed on the first electrode; and an insulating layer disposed on the second electrode; and the pixel structure includes in the second pixel region: the second electrode; the first electrode disposed on the second electrode; and the insulating layer disposed on the first electrode.

[0015] In an embodiment of the present invention, the first electrode is a common electrode, and the second electrode is a pixel electrode.

[0016] In an embodiment of the present invention, the insulating layer in the first pixel region is in contact with the second electrode.

[0017] In an embodiment of the present invention, the insulating layer is a polyimide layer.

[0018] Compared with the prior art, the pixel structure of the display of the present invention can not only improve the problem of image sticking caused by parasitic capacitance in the liquid crystal display, but also make it unnecessary to rely on the operator's visual inspection to adjust the flicker, thereby saving the labor cost spent by the operator to adjust the flicker, so as to improve the performance and quality of the product.

[0019] To make the above content of the present invention more obvious and understandable, the following preferred embodiments are specifically exemplified and described in detail in conjunction with the accompanying drawings as follows: BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of the pixel structure of the display according to the first embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following descriptions of the embodiments refer to the accompanying drawings, which illustrate specific embodiments in which the present invention can be implemented. Furthermore, the directional terms mentioned in the present invention, such as up, down, top, bottom, front, back, left, right, inside, outside, side, surrounding, center, horizontal, transverse, vertical, longitudinal, axial, radial, the uppermost layer or the lowermost layer, etc., are only with reference to the directions in the accompanying drawings. Therefore, the directional terms used are for explaining and understanding the present invention, rather than for limiting the present invention.

[0022] As used herein, the term "Image-Sticking" refers to the phenomenon that the display shows the same static image for a long time and leaves the previous image after changing the display content.

[0023] As used herein, the term "pixel region" refers to the basic unit of the display image. A pixel region is usually designed as a square, and a square pixel is further divided into three color units: red, green, and blue.

[0024] As used herein, the terms "a", "an", and "at least one" include plural references unless the context clearly dictates otherwise. For example, the term "an electrode" or "at least one electrode" may include a plurality of electrodes, including their combinations.

[0025] The sizes and values disclosed herein are not intended to be construed as strictly limited to the exact values recited. Instead, unless otherwise specified, the various sizes are intended to represent the recited value and ranges that are functionally equivalent to the recited value. For example, a size disclosed as "10 microns" means "about 10 microns".

[0026] Please refer to Figure 1 As shown, to achieve the foregoing objectives of the present invention, an embodiment of the present invention provides a pixel structure 1 of a display, such as a pixel structure applied to an array substrate of a thin film transistor (TFT) display. The pixel structure 1 includes: a first pixel region A and a second pixel region B. The pixel structure 1 includes in the first pixel region A: a first electrode 11; an insulating protective layer 12; and an insulating layer 14. In this embodiment, the first electrode 11 is a common electrode; the insulating protective layer 12 is disposed on the first electrode 11; a second electrode 13 is disposed on the insulating protective layer 12. In this embodiment, the second electrode 13 is a pixel electrode; and the insulating layer 14 is disposed on the second electrode 13. In this embodiment, the insulating layer 14 is a polyimide layer. The second pixel region B is adjacent to the first pixel region A. The pixel structure 1 includes in the second pixel region B the first electrode 11, the insulating protective layer 12, the second electrode 13, and the insulating layer 14, where the insulating protective layer 12 is disposed on the second electrode 13, the first electrode 11 is disposed on the insulating protective layer 12, and the insulating layer 14 is disposed on the first electrode 11. In other words, the configuration of the first electrode 11 and the second electrode 13 in the first pixel region A is opposite to the configuration of the first electrode 11 and the second electrode 13 in the second pixel region B. Thus, the insulating layer 14 in the first pixel region A has a first ionic polarity 15, and the insulating layer 14 in the second pixel region B has a second ionic polarity 16, and the first ionic polarity 15 and the second ionic polarity 16 are opposite to each other in polarity. Preferably, the first ionic polarity 15 is negative and the second ionic polarity 16 is positive.

[0027] Preferably, as Figure 1As shown, in the first pixel region A, the insulating layer 14 is in contact with the second electrode 13; in the second pixel region B, the insulating layer 14 is in contact with the first electrode 11. After the multiple first ions 151 of the first ion polarity 15 and the multiple second ions 161 of the second ion polarity 16 are redistributed and diffused through the insulating layer 14, the multiple first ions 151 remaining in the first pixel region A and the second ions 161 remaining in the second pixel region B are reduced or neutralized.

[0028] Furthermore, another embodiment of the present invention further provides a pixel structure similar to the display described above, including: a first pixel region and a second pixel region, the second pixel region being adjacent to the first pixel region; the pixel structure in the first pixel region includes: a first electrode, a second electrode, and an insulating layer. The second electrode is disposed on the first electrode. The insulating layer is disposed on the second electrode. The pixel structure in the second pixel region includes: the second electrode, the first electrode, and the insulating layer. The first electrode is disposed on the second electrode, and the insulating layer is disposed on the first electrode. Preferably, the first electrode is a common electrode, and the second electrode is a pixel electrode. Preferably, the insulating layer is a polyimide layer. The first pixel region has a first DC residual electric field, and the second pixel region has a second DC residual electric field, and the electric field directions of the first DC residual electric field and the second DC residual electric field are opposite to each other. In the first pixel region, the insulating layer is in contact with the second electrode; in the second pixel region, the insulating layer is in contact with the first electrode; so that after the first DC residual electric field and the second DC residual electric field are redistributed and diffused through the insulating layer, the first DC residual electric field in the first pixel region and the second DC residual electric field in the second pixel region are reduced or neutralized. The multiple first ions of the first DC residual electric field and the multiple second ions of the second DC residual electric field are redistributed, diffused, or neutralized through the insulating layer

[0029] As described above, compared with the existing method of adjusting the common voltage, although the problem of image sticking can be improved, the load between liquid crystal panels often varies due to the drift caused by manufacturing errors in the liquid crystal panel, resulting in different feed-through voltages between liquid crystal panels and uneven flickering. In addition, the existing method of adjusting the common voltage using variable resistors relies on visual inspection by operators to adjust the flickering. However, the sensitivity of operators to flickering is different, resulting in different quality control standards for judging flickering, and the adjustment by operators will incur a lot of labor costs, resulting in disadvantages such as uneven efficiency and quality and high costs. The pixel structure of the display of the present invention can effectively improve, reduce or eliminate the residual ions accumulated between the insulating layer and the electrode through the alternating design of the common electrode and the pixel electrode structure between adjacent pixel regions, thereby weakening or eliminating the image sticking phenomenon, and further improving the efficiency and quality of the product.

[0030] The present invention has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, modifications and equivalent arrangements included in the spirit and scope of the claims are included in the scope of the present invention.

Claims

1. A pixel structure of a display, characterized in that: The pixel structure includes: A first pixel region, and the pixel structure includes in the first pixel region: A first electrode; An insulating protective layer disposed on the first electrode; A second electrode disposed on the insulating protective layer; and An insulating layer disposed on the second electrode; and A second pixel region adjacent to the first pixel region, and the pixel structure includes the first electrode, the insulating protective layer, the second electrode, and the insulating layer in the second pixel region, wherein the insulating protective layer is disposed on the second electrode, the first electrode is disposed on the insulating protective layer, and the insulating layer is disposed on the first electrode; Wherein the insulating layer in the first pixel region has a first ion polarity, the insulating layer in the second pixel region has a second ion polarity, the first ion polarity and the second ion polarity are opposite to each other, and a plurality of first ions with the first ion polarity and a plurality of second ions with the second ion polarity are redistributed, diffused, or neutralized through the insulating layer; The first electrode in the first pixel region and the second electrode in the second pixel region are disposed on the same layer, and the second electrode in the first pixel region and the first electrode in the second pixel region are disposed on the same layer; Wherein, the insulating layer in the first pixel region is in contact with the second electrode; the insulating layer in the second pixel region is in contact with the first electrode, and the insulating layer is a polyimide layer; the first pixel region has a first DC residual electric field, the second pixel region has a second DC residual electric field, the electric field directions of the first DC residual electric field and the second DC residual electric field are opposite to each other, and the insulating layer is configured to redistribute and diffuse the first DC residual electric field and the second DC residual electric field through the insulating layer to reduce or neutralize the first DC residual electric field and the second DC residual electric field.

2. The pixel structure of the display according to claim 1, characterized in that: The first ion polarity is negative, and the second ion polarity is positive.

3. The pixel structure of the display according to claim 1, wherein: The first electrode is a common electrode, and the second electrode is a pixel electrode.

4. A pixel structure of a display, characterized in that: The pixel structure includes: A first pixel region; and A second pixel region adjacent to the first pixel region; Wherein the first pixel region has a first DC residual electric field, the second pixel region has a second DC residual electric field, the electric field directions of the first DC residual electric field and the second DC residual electric field are opposite to each other, and a plurality of first ions of the first DC residual electric field and a plurality of second ions of the second DC residual electric field are redistributed, diffused, or neutralized through the insulating layer; The pixel structure includes in the first pixel region: A first electrode; A second electrode disposed on the first electrode; and An insulating layer disposed on the second electrode; and The pixel structure includes in the second pixel region: The second electrode; The first electrode disposed on the second electrode; and The insulating layer disposed on the first electrode; Among them, the insulating layer in the first pixel region is in contact with the second electrode; the insulating layer in the second pixel region is in contact with the first electrode, and the insulating layer is a polyimide layer.

5. The pixel structure of the display according to claim 4, characterized in that: The first electrode is a common electrode, and the second electrode is a pixel electrode.

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