Patent Application
20250006124
This application claims priority to Chinese Patent Application No. 202310803436.3, filed Jun. 30, 2023, the entire disclosure of which is incorporated herein by reference.
The present disclosure relates to the field of displaying technologies, and more particularly, to a display panel and a display device.
An organic light emitting diode (OLED) display panel has the advantages like small thickness, high brightness, low power consumption, fast response, wide color gamut and so on, and thus is widely used in electronic products such as TVs, mobile phones, notebooks. With the increasingly-wide applications of the TVs, mobile phones, notebooks and other electronic products, the protection of personal information and confidential information has become a problem that cannot be ignored.
At present, the most important anti-view way is to stick a layer of anti-view film on a surface of the display panel. The anti-view film reduces a brightness of the display panel and affects a visual effect of a screen of the display panel, and the anti-view film needs to be removed manually when the user wants to switch the screen back to a sharing mode, which affects a sharing effect of the screen.
Therefore, a display panel using anti-view pixels to prevent peeping has been proposed. In the sharing mode, the anti-view pixels are turned off. In the anti-view mode, the anti-view pixels are turned on, and the light emitted by the anti-view pixels is used as the interference light to interfere with the information reading under the wide view angle, so as to realize the anti-view function. In this solution, the switching between an anti-view mode and the sharing mode can be realized by controlling the on and off of the anti-view mode, which avoids affecting the sharing effect of the screen. However, the interference effect caused by the above solution is limited, and the interference with the information reading is not reliable enough.
There are provided a display panel and a display device according to embodiments of the present disclosure. The technical solution is as below:
According to an aspect of embodiments of the present disclosure, there is provided a display panel includes:
According to another aspect of the present disclosure, a display device is provided, including the above display panel and a motherboard connected to the display panel.
It should be understood that the general description above and the detailed description in the following text are only illustrative and do not limit the present disclosure.
In order to explain the technical solutions in the embodiments of the present disclosure or the prior art more clearly, the drawings used by the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description may be merely some embodiments of the present disclosure. For those of ordinary skilled in the art, other drawings may be obtained according to the structures shown in the drawings without creative effort.
Although the invention can be easily expressed in different forms of embodiments, only some specific embodiments are shown in the drawings and will be described in detail in this specification. At the same time, it can be understood that this specification should be regarded as an exemplary description of the principles of the invention, and is not intended to limit the invention to those described here.
Thus, a feature pointed out in this specification will be used to illustrate one of the features of one embodiment of the invention, rather than implying that each embodiment of the invention must have the described feature. In addition, it should be noted that this specification describes many features. Although some features can be combined to show the possible system design, these features can also be used for other unspecified combinations. Thus, unless otherwise stated, the combination stated is not intended to be restrictive.
In the embodiment shown in the drawings, the direction indication (such as up, down, left, right, front, rear, etc.) is used to explain that the structure and movement of various elements of the invention are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the attached drawings. If the description of the position of these elements changes, the indication of these directions also changes accordingly.
The exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in a variety of forms, and should not be understood as limited to the examples set forth herein; on the contrary, providing these exemplary embodiments makes the description of the present invention more comprehensive and complete, and comprehensively communicates the idea of the exemplary embodiments to those skilled in the art. The attached drawings are only schematic diagrams of the present invention and are not necessarily drawn to scale. The same reference numerals in the figure denote the same or similar parts, and therefore repeated descriptions thereof will be omitted.
An embodiment of the present disclosure provides a display panel, including a plurality of sub-pixel driving circuits and a plurality of anti-view pixel driving circuits.
The sub-pixel driving circuit is configured to drive a light-emitting part 10111 of the display panel to be turned on or off accordingly. It can be understood that, in an embodiment, the light-emitting part 10111 may emit red light to form a red sub-pixel, emit green light to form a green sub-pixel, or emit blue light to a blue sub-pixel. Each light-emitting part 10111 may be driven to emit light, such that the light of different colors emitted by the light-emitting parts 10111 can be mixed to form different colors and the display panel can display colorful pictures.
In an embodiment, each light-emitting part 10111 may be arranged to emit light independently, that is, each light-emitting part 10111 includes a light-emitting material emitting red light, green light or blue light, and correspondingly forms a R-red sub-pixel, a B-blue sub-pixel, or a G-green sub-pixel.
In an embodiment, the light color of the light-emitting part 10111 can also be realized by using a light color conversion technology. For example, a sub-pixel of the display panel includes a blue light emitting layer emitting blue light and a light color conversion layer made of light color conversion material. The blue light emitting layer can be located below a cathode layer, and the light color conversion layer can be located above the cathode layer. The light color conversion material such as quantum dots can convert the blue light emitted by the OLED into green light or red light, realizing the R-red sub-pixel and G-green sub-pixel. The B-blue sub-pixel includes a blue emitting layer emitting blue light. The blue light emitted by the blue light emitting layer can directly pass through the transparent area of the light color conversion layer without quantum dots, so as to emit blue light. Thus, the sub-pixel of the display panel can emit three primary color lights.
In an embodiment, the light color of the light-emitting part 10111 can also be realized by using a color filter film technology, which includes an OLED emitting white light and a color filter film. The color filter film is configured to filter the white light emitted by the OLED to realize a R-red sub-pixel, a B-blue sub-pixel and a G-green sub-pixel.
Referring to
Referring to
In an embodiment, the anti-view pixel driving circuits are respectively connected to the sub-pixel driving circuits such that a control end of the anti-view switch tube M2′ of the anti-view pixel driving circuit shares the scan line with the sub-pixel driving circuit. As shown in
In order to further improve the anti-view effect, in an embodiment, the anti-view pixels are arranged to have different brightness and be lighted at different times. For example, the display panel further includes a plurality of driving tubes respectively electrically connected to the scan lines. The driving tubes have different sizes. Due to the driving tubes of different sizes, strengths of the scanning signals input to the anti-view switch tubes M2′ of the anti-view pixel driving circuits are different, the anti-view switch tubes M2′ of the anti-view pixel driving circuit are turned on to different degrees. Accordingly, the anti-view light-emitting parts 10121 have different brightness and a brightness difference between the anti-view light-emitting parts 10121 is formed, which, compared with the way that all anti-view light-emitting parts 10121 have the same brightness, can better attract the attention of the peeper. Moreover, in combination with the dynamic flickering effect of the anti-view light-emitting parts 10121 as a result of the different inputting times of the scanning signals, the interference effect and reliability of the anti-view function are further improved.
Furthermore, in an embodiment, each scan line of each sub-pixel driving circuit is provided with signal by a separate GOA (Gate on Array) driving tube. The GOA driving tubes have different sizes. That is, the anti-view pixel driving circuits are connected to different scan lines of different sub-pixel driving circuits, the scanning signals are input to different sub-pixel driving circuits at different times and the anti-view light-emitting parts 10121 are turned on at different times based on the scanning signals, and the anti-view light-emitting parts 10121 have different brightness due to the GOA driving tubes of different sizes. In this way, the anti-view light-emitting parts 10121 have different brightness and are turned on at different times, which improves the interference effect and thus further improves the reliability of the anti-view function.
Referring to
In this embodiment, the anti-view light-emitting part 10121 is controlled to be turned on or off based on the scanning signal of the sub-pixel driving circuit. In this way, the scanning signals are input to different anti-view pixel driving circuits at different times, and the anti-view light-emitting parts 10121 driven by different anti-view pixel driving circuits are lighted at different times accordingly. For example, the signals S1(n-1), S1(n) and S2 are input to the anti-view pixel driving circuits at different times, and the anti-view light-emitting parts 10121 driven by the anti-view pixel driving circuits respectively provided with the signals S1(n-1), S1(n), and S2 are lighted at different times, which achieves a better interference effect. Moreover, the display panel of the embodiment has the advantages of simple structure, easy assembly and low cost.
In this embodiment, the anti-view pixel driving circuit shares not only the scan line with the sub-pixel driving circuit, but also the power supply voltage line VDD and the common ground voltage line VSS with the sub-pixel driving circuit, thus, separate layouts for the power supply voltage line VDD and the common ground voltage line VSS of the anti-view pixel driving circuit can be omitted, which has simple structure and convenient transformation, and facilitates the promotion of the display panel.
As shown in
In an embodiment, the signal input to the second end of the anti-view switch tube M2′ through the first data line VD is a DC signal; an identical DC signal is input to the second ends of the anti-view switch tubes M2′ of multiple anti-view pixel driving circuit 1012, or the second ends of the anti-view switch tubes M2′ of multiple anti-view pixel driving circuit 1012 are respectively connected to different pins of a driving IC to receive different DC signals.
Referring to
to a first scan line, a second scan line, and a third scan line, for example, the line S2, the line S1(n-1), or the line S1(n). Scanning signals are respectively input to the first scan line, the second scan line and the third scan line at different times during the line scanning process.
Among the multiple anti-view pixel driving circuits, the control ends of the anti-view switch tubes of a part of the anti-view pixel driving circuits share the first scan line with the sub-pixel driving circuits corresponding to the anti-view pixel driving circuits, and the control ends of the anti-view switch tubes of another part of the anti-view pixel driving circuits share the second scan line with the sub-pixel driving circuits corresponding to the anti-view pixel driving circuits, and the control ends of the anti-view switch tubes of the remaining part of the anti-view pixel driving circuits share the third scan line with the sub-pixel driving circuits corresponding to the anti-view pixel driving circuits. Based on the time sequence in which the scanning signals are input to the first scan line, the second scan line, and the third scan line, the anti-view light-emitting parts 10121 are controlled to be lighted in the same time sequence. In this way, the multiple anti-view light-emitting parts 10121 are roughly divided into three parts according to the scan lines connected thereto, and the anti-view light-emitting parts 10121 of the three parts are lighted in turn according to the time sequence in which the scanning signals are input to the three scan lines, which can significantly improve the anti-view effect.
Taking the sub-pixel driving circuit electrically connected to the first scan line, the second scan line and the third scan line as an example, the circuit structure of the sub-pixel driving circuit is illustrated in more detail as follows.
Referring to
A control end of the first switch tube Ml is electrically connected to a
control signal line Emit, a first end of the first switch tube Ml is electrically connected to the power supply voltage line VDD, and a second end of the first switch tube M1 is electrically connected to a second sub-node N2. A control end of the second switch tube M2 is electrically connected to the first scan line S2, a first end of the second switch tube M2 is electrically connected to a second data line Vdata, and a second end of the second switch tube M2 is electrically connected to the second sub-node N2. A control end of the third switch tube M3 is electrically connected to a first sub-node N1, a first end of the third switch tube M3 is electrically connected to the second sub-node N2, and a second end of the third switch tube M3 is electrically connected to a third sub-node N3. One end of the second capacitor Cst is electrically connected to the power supply voltage line VDD, and the other end of the second capacitor Cst is electrically connected to the first sub-node N1. A control end of the fourth switch tube M4 is electrically connected to the first scan line S2, a first end of the fourth switch tube M4 is electrically connected to the third sub-node N3, and a second end of the fourth switch tube M4 is electrically connected to the first sub-node N1. A control end of the fifth switch tube M5 is electrically connected to a second scan line S1(n-1), a first end of the fifth switch tube M5 is electrically connected to a reference voltage signal line Vref, and a second end of the fifth switch tube M5 is electrically connected to the first sub-node N1. A control end of the sixth switch tube M6 is electrically connected to the control signal line Emit, a first end of the sixth switch tube M6 is electrically connected to the third sub-node N3, and a second end of the sixth switch tube M6 is electrically connected to a fourth sub-node N4. A control end of the seventh switch tube M7 is electrically connected to the third scan line S1(n), a first end of the seventh switch tube M7 is electrically connected to the reference voltage signal line Vref, and a second end of the seventh switch tube M7 is electrically connected to the fourth sub-node N4. The fourth sub-node N4 is electrically connected to the common ground voltage line VSS. The light-emitting part 10111 is connected in series between the fourth sub-node N4 and the common ground voltage line VSS. In this way, S1(n-1) is configured to reset the first sub-node N1, S1(n) is configured to reset the fourth sub-node N4, S2 is configured to write the signal, and the three groups of scanning signals Scan are turned on at different times.
In combination with the time sequence diagram shown in
In the first reset stage t1, the second scan line S1(n-1) controls the fifth switch tube M5 to be turned on, and the first sub-node N1 is reset by a reference voltage provided by the reference voltage signal line Vref through the fifth switch tube M5. In the second reset stage t2, the third scan line S1(n) controls the seventh
switch tube M7 to be turned on, and the fourth sub-node N4 is reset by the reference voltage provided by the reference voltage signal line Vref through the seventh switch tube M7.
In the charging phase t3, the first scan line S2 controls the second switch tube M2 and the fourth switch tube M4 to be turned on, and the signal provided by the second data line Vdata is written to the second sub-node N2 through the second switch tube M2. In the charging stage t3, the third switch tube M3 is turned on to change the potential of the first sub-node N1.
In the light emitting stage t4, the first switch tube M1, the third switch tube M3 and the sixth switch tube M6 are all turned on, and the light-emitting part 10111 is lighted.
The anti-view pixel driving circuits are connected to different scan lines of different sub-pixel driving circuits, namely, the second scan line S1 (n-1), the third scan line S1 (n), and the first scan line S2, such that the anti-view light-emitting parts 10121 are turned on at different times, and the anti-view light-emitting parts 10121 and the lighting times of the light-emitting part 10111 are lighted at different times accordingly, which can achieve a more significant anti-view effect.
In an embodiment, for any three adjacent anti-view light-emitting parts
10121 in the same row, the anti-view pixel driving circuit having one anti-view light-emitting part 10121 shares the first scan line with the sub-pixel driving circuit corresponding to the anti-view pixel driving circuit, and the anti-view pixel driving circuit having another anti-view light-emitting parts 10121 shares the second scan line with the sub-pixel driving circuit corresponding to the anti-view pixel driving circuit, and the anti-view pixel driving circuit having the remaining anti-view light-emitting parts 10121 shares the third scan line with the sub-pixel driving circuit corresponding to the anti-view pixel driving circuit. In this way, in the line scanning process, the adjacent anti-view light-emitting parts 10121 can be lighted at different times through different scanning signals, which can form a more obvious lighting sequence gradient change and thus further improve the interference effect and the anti-view performance.
Referring to the schematic diagram of the pixel architecture illustrated in
Referring to the anti-view principle of the display panel shown in
Furthermore, the anti-view pixels F arranged adjacent to the display pixel unit 101 can share the scan lines with the R-red sub-pixel, the B-blue sub-pixel, or the G-green sub-pixel, to light the anti-view light-emitting part 10121 through the scanning signal.
In this way, the adjacent anti-view light-emitting parts 10121 are lighted at different times by different scanning signals, which effectively attracts the attention of the peeper, and achieves better anti-view effect. Furthermore, the adjacent anti-view light-emitting parts 10121 are lighted by the driving tubes of different sizes to have different brightness, thus, the anti-view effect can be further improved. In addition, after the display pixel unit 101 is lighted, the light emitted by the anti-view light-emitting part 10121 can be mixed with the light emitted by the display pixel unit 101 adjacent to the anti-view light-emitting part 10121 to realize the anti-view function in which the anti-view light-emitting parts 10121 have different brightness. Thus, a more multidimensional anti-view combination form is formed to achieve better light mixing anti-view effect, and the anti-view function during the line scanning process is more reliable.
Furthermore, in an embodiment, as shown in
In an embodiment, the first shielding part 102 can be a black matrix.
In an embodiment, the second shielding part 103 can be a black matrix.
In other embodiments, the sub-pixel driving circuit can also be arranged to be electrically connected to the first scan line (e.g., the first scan line S2) and the second scan line (e.g., the second scan line S1(n-1) and/or the third scan line S1(n)). The scanning signals are input to the first scan line and the second scan line at different times during the line scanning process. Among the multiple anti-view pixel driving circuits, the control ends of the anti-view switch tubes M2′ of a part of the anti-view pixel driving circuits share the first scan line with the sub-pixel driving circuits corresponding to the anti-view pixel driving circuits, and the control ends of the anti-view switch tubes M2′ of the other part of the anti-view pixel driving circuits share the second scan line with the sub-pixel driving circuit corresponding to the anti-view pixel driving circuits. On this basis, in an embodiment, for two adjacent anti-view pixel driving circuits 1012 in the same row, the control end of one anti-view switch tube M2′ shares the first scan line with the sub-pixel driving circuit corresponding to the anti-view pixel driving circuit, and the control end of the other anti-view switch tube M2′ shares the second scan line with the sub-pixel driving circuit corresponding to the anti-view pixel driving circuit.
In other embodiments, the sub-pixel driving circuit can also be arranged to be electrically connected to the first scan line. For example, the sub-pixel driving circuit is set as a 2TIC circuit, and the on and off of the sub-pixel are controlled by the switch tube of the sub-pixel driving circuit. The first scan line is connected to the control end of the switch tube of the sub-pixel driving circuit to control the degree to which the switch tube of the sub-pixel driving circuit is turned on. Furthermore, among a plurality of anti-view pixel driving circuits 1012 in the same row, a part of the anti-view pixel driving circuits 1012 share the first scan line with the sub-pixel driving circuit in the current row, and a part of the anti-view pixel driving circuits 1012 share the first scan line with the sub-pixel driving circuit in the previous row, and/or the remaining part of the anti-view pixel driving circuits 1012 shares the first scan line with the sub-pixel driving circuit in the next row. On this basis, in an embodiment, among the multiple anti-view pixel driving circuits 1012 in the same row, for two adjacent anti-view pixel driving circuits 1012, one of the two adjacent anti-view pixel driving circuits 1012 shares the first scan line with the sub-pixel driving circuit in the current row, and the other one shares the first scan line with the sub-pixel driving circuit in the previous row or the next row, which allows the anti-view pixels to be lighted at different times in the line scanning process.
As shown in
In this embodiment, the display device includes the display panel 1, which includes a plurality of the sub-pixel driving circuits and a plurality of the anti-view pixel driving circuits. The sub-pixel driving circuit is electrically connected to at least one scan line. The anti-view pixel driving circuit includes the anti-view light-emitting part 10121 and the anti-view switch tube for controlling the on and off of the anti-view light-emitting part 10121. The anti-view pixel driving circuits are respectively connected to the sub-pixel driving circuits such that the control end of the anti-view switch tube of the anti-view pixel driving circuit shares the scan line with the sub-pixel driving circuit. The scanning signals are input to the scan lines of at least two sub-pixel driving circuits at different times during the line scanning process, such that the scanning signals are input to the control ends of the anti-view switch tubes of at least two anti-view pixel driving circuits at different times. Thus, in the line scanning process, the anti-view light-emitting parts 10121 are lighted at different times, resulting in the effect that the anti-view light-emitting parts 10121 flicker dynamically, which can better attract the attention of the peeper, significantly increase the interference effect, and improve the anti-view performance, compared with the way that all the anti-view light-emitting parts 10121 are lighted at the same time. In addition, the technical solution of the embodiment adopts the way that the anti-view pixel driving circuit shares the scan line with the sub-pixel driving circuit to realize the anti-view function, which has a simple structure and a convenient transformation, and is beneficial to the promotion of the display device in the field.
The above descriptions are only optional embodiments of the application, and do not limit the scope of the patents of the present application. All the equivalent structural transformations made by the content of the specification and drawings of the present application under the creative concept of the present application, or directly/indirectly used in other related technical fields are all comprised in the protection scope of the patents of the present application.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202310803436.3 | Jun 2023 | CN | national |
