Patent Application
20240005843
This application claims the priority of Chinese Patent Application No. 202210755110.3, filed on Jun. 30, 2022, the content of which is incorporated herein by reference in its entirety.
The present disclosure generally relates to the field of display technologies and, more particularly, relates to a display panel and a display device.
With continuous improvement of display technologies, people's requirements for display devices are also increasing. Among various display technologies, self-luminous display devices have advantages of self-luminous, thin, low power consumption, high contrast, high color gamut, and flexible display, and have been widely used in various electronic devices such as computers or mobile phones. A self-luminous element in existing self-luminous display devices is generally an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), or a micro light-emitting diode (Micro LED). When actually displaying, the light-emitting element is generally driven to emit light by a driving current output from a pixel driving circuit, such that the display device achieves the purpose of screen display. However, the display effect of the existing display device needs to be improved.
One aspect of the present disclosure provides a display panel. The display panel includes a first pixel row group to an N-th pixel row group, a first scanning driving circuit to an N-th scanning driving circuit, first data lines and second data lines. An i-th pixel row group includes a first pixel row to an M-th pixel row, and a j-th pixel row includes a first pixel and a second pixel. A luminous efficiency of corresponding color light of the first pixel is lower than a luminous efficiency of corresponding color light of the second pixel. An i-th scanning driving circuit includes a first sub scanning driving circuit electrically connected to all first pixels in the i-th pixel row group, and a second sub scanning driving circuit electrically connected to all second pixels in the i-th pixel row group. The first data lines are electrically connected to the first pixels in the i-th pixel row group, and the second data lines electrically connected to the second pixels in the i-th pixel row group. Different first pixels are electrically connected to different first data lines; and different second pixels are electrically connected to different second data line. In at least one image frame, a duration during which one first pixel is connected to one corresponding first data line for transmitting data voltage controlled by one corresponding first sub scanning driving circuit is larger than a duration during which one second pixel is connected to one corresponding second data line for transmitting data voltage controlled by one corresponding second sub scanning driving circuit.
Another aspect of the present disclosure provides a display device. The display device includes a display panel. The display panel includes a first pixel row group to an N-th pixel row group, a first scanning driving circuit to an N-th scanning driving circuit, first data lines and second data lines. An i-th pixel row group includes a first pixel row to an M-th pixel row, and a j-th pixel row includes a first pixel and a second pixel. A luminous efficiency of corresponding color light of the first pixel is lower than a luminous efficiency of corresponding color light of the second pixel. An i-th scanning driving circuit includes a first sub scanning driving circuit electrically connected to all first pixels in the i-th pixel row group, and a second sub scanning driving circuit electrically connected to all second pixels in the i-th pixel row group. The first data lines are electrically connected to the first pixels in the i-th pixel row group, and the second data lines electrically connected to the second pixels in the i-th pixel row group. Different first pixels are electrically connected to different first data lines; and different second pixels are electrically connected to different second data line. In at least one image frame, a duration during which one first pixel is connected to one corresponding first data line for transmitting data voltage controlled by one corresponding first sub scanning driving circuit is larger than a duration during which one second pixel is connected to one corresponding second data line for transmitting data voltage controlled by one corresponding second sub scanning driving circuit.
Other aspects or embodiments of the present disclosure can be understood by those skilled in the art in light of the description, the claims, and the drawings of the present disclosure.
The following drawings are merely examples for illustrative purposes according to various disclosed embodiments and are not intended to limit the scope of the present disclosure.
Reference will now be made in detail to exemplary embodiments of the disclosure, which are illustrated in the accompanying drawings. Hereinafter, embodiments consistent with the disclosure will be described with reference to drawings. In the drawings, the shape and size may be exaggerated, distorted, or simplified for clarity. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts, and a detailed description thereof may be omitted.
Further, in the present disclosure, the disclosed embodiments and the features of the disclosed embodiments may be combined under conditions without conflicts. It is apparent that the described embodiments are some but not all of the embodiments of the present disclosure. Based on the disclosed embodiments, persons of ordinary skill in the art may derive other embodiments consistent with the present disclosure, all of which are within the scope of the present disclosure.
Moreover, the present disclosure is described with reference to schematic diagrams. For the convenience of descriptions of the embodiments, the cross-sectional views illustrating the device structures may not follow the common proportion and may be partially exaggerated. Besides, those schematic diagrams are merely examples, and not intended to limit the scope of the disclosure. Furthermore, a three-dimensional (3D) size including length, width, and depth should be considered during practical fabrication.
A self-luminous element in existing self-luminous display devices is generally an organic light-emitting diode, a quantum dot light-emitting diode, or a micro-light-emitting diode. When actually displaying, the light-emitting element is generally driven to emit light by a driving current output from a pixel driving circuit, such that the display device achieves the purpose of screen display. The luminous efficiency of light of different colors is different. Therefore, when the existing pixel driving circuit uses a same timing to drive light-emitting elements of different colors, pixels of different colors may have uneven brightness and smear color cast when they emit light, such that the display effect of the existing display device needs to be improved.
The present disclosure provides a display panel and display device to at least partially alleviate the above problem and improve the display effect of the display device.
One aspect of the present disclosure provides a display panel.
The i-th pixel row group 10i may include a first pixel row P1 to an M-th pixel row Pm. The j-th pixel row Pj may include a first pixel 11 and the second pixel 12. A luminous efficiency of the corresponding color light of the first pixel 11 may be lower than the luminous efficiency of the corresponding color light of the second pixel 12. N may be an integer larger than or equal to 2, M may be an integer larger than or equal to 1, i may be a positive integer less than or equal to N, and j may be a positive integer less than or equal to M.
The i-th scanning driving circuit 20i may include a first sub scanning driving circuit 21 and a second sub scanning driving circuit 22. The first sub scanning driving circuit 21 in the i-th scanning driving circuit 20i may be electrically connected to all the first pixels 11 in the i-th pixel row group 10i, and the second sub scanning driving circuit 22 in the i-th scanning driving circuit 20i may be electrically connected to all the second pixels 12 in the i-th pixel row group 10i.
The first data lines D1 may be electrically connected to the first pixels 11 in the i-th pixel row group 10i. Different first pixels 11 may be electrically connected to the different first data lines D1 respectively. The second data lines D2 may be electrically connected to the second pixels 12 in the i-th pixel row group 10i. Different second pixels 12 may be electrically connected to the different second data lines D2 respectively. In at least one image frame, the time T1 during which one first pixel 11 is connect to one corresponding first data line D1 to transmit the data voltage controlled by one corresponding first sub scanning driving circuit 21 may be longer than the time T2 during which one second pixel 12 is connect to one corresponding second data line D2 to transmit the data voltage controlled by one corresponding second sub scanning driving circuit 22.
In one embodiment, the first pixels 11 may be green light pixels, and the second pixels 12 may include red light pixels and/or blue light pixels.
In the present disclosure, in the display device, the luminous efficiency of the corresponding color light of the first pixels may be lower than the luminous efficiency of the corresponding color light of the second pixels. Correspondingly, in at least one image frame displayed by the display device, the time during which one first pixel is connect to one corresponding first data line to transmit the data voltage controlled by one corresponding first sub scanning driving circuit may be configured to be longer than the time during which one second pixel is connected to one corresponding second data line to transmit the data voltage controlled by one corresponding second sub scanning driving circuit, therefore compensating the light-emitting brightness of the first pixel. The light-emitting brightness of the first pixel may be ensured to be high, and the uniformity of the light-emitting brightness of the first pixel and the second pixel may be improved. Problems such as smear or color cast of the display device may be avoided, and the display effect of the display device may be improved.
In the present disclosure, for the first pixels and second pixels, each pixel may be provided with a pixel driving circuit. One pixel driving circuit may be electrically connected to a corresponding light-emitting device, and may be configured to output driving signals to control the timing of turning on or turning off the light-emitting device. In the present disclosure, when one sub scanning driving circuit is electrically connected to one corresponding pixel, the sub scanning driving circuit may be actually electrically connected to the pixel driving circuit of the corresponding pixel, to transmit control signals of the pixel driving circuit and then control the pixel driving circuit to output driving signals for controlling one corresponding light-emitting device according to a preset timing. The present disclosure has no limit on a circuit structure of the pixel driving circuit.
When one sub scanning driving circuit controls one corresponding pixel driving circuit to work, the process for one image frame may include controlling the pixel driving circuit to perform the reset stage, the data voltage writing stage and the light-emitting stage in sequence. That is, the sub scanning driving circuit may control the pixel driving circuit to complete the above three stages. The sub scanning driving circuit may control the corresponding pixel to be connected to one corresponding data line for transmitting voltage in the data writing stage. As shown in
In one embodiment, the at least one image frame may include the first image frame when the display panel is powered on, to improve the brightness of the first pixel in the first image frame and avoid smearing when the display panel is turned on. Problems such as smear or color cast of the display device may be avoided, and the display effect of the display device may be improved. Optionally, in some embodiments, the at least one image frame may only include the first image frame, which is not specifically limited by the present disclosure.
As shown in
In each pixel row group, all the first pixels 11 may be scanned at the same time, and all the second pixels 12 may be scanned at the same time. Therefore, the first data lines D1 electrically connected to different first pixels 11 may be different, and the second data lines D2 electrically connected to different second pixels 12 may be different, to avoid the occurrence of light output errors caused by the first pixel 11 and the second pixel 12 being connected to data voltages unrelated to themselves. Further, since different pixel row groups are scanned in a cascaded manner, the first pixels 11 of different pixel row groups may be electrically connected to one same first data line D1, and the second pixels 12 of different pixel row groups may also be electrically connected to one same second data line D2, therefore reducing the number of data lines. Resources may be reduced, and the effective wiring area of the display device may be ensured to be large.
In one embodiment, both the first sub scanning driving circuits 21 and the second sub scanning driving circuits 22 may be located on the same side of the pixel rows, as shown in
In any pixel row, all the first pixels 11 and the second pixels 12 may be sequentially arranged along the same straight line. As shown in
In one embodiment, the time length difference of the pixel drive circuits in the data writing stage through the sub-pixel drive circuits may be used to achieve the purpose of controlling the time length difference of the first pixels and the second pixels connecting to the data voltage. Alternatively, in another embodiment, the first sub scanning driving circuits and the second sub scanning driving circuits may control the respective corresponding pixel driving circuits to have the same duration in the data writing stage, and control the time for transmitting the data voltage on the data line, to achieve the purpose of controlling the time length difference of the first pixels and the second pixels connecting to the data voltage. Specifically, in one embodiment, as shown
As shown in
The resolution where the duration of the data lines to transmit the voltage is controlled to achieve the control of the time difference of the duration of the first pixels and the second pixels to be connected to the data voltage is not only applicable to the scheme where only one pixel row is included in one pixel row group. In some other embodiments, when one pixel row group includes a plurality of pixel rows, that is, when M is larger than 1, in one scanning driving circuit, the first sub scanning driving circuit and the second sub scanning driving circuit may also work at the same time and have the same output driving waveform. The first data lines connected to all the first pixels in each row group may be different, and the second data lines connected to all the second pixels in each pixel row group may be different. All the first data lines and the second data line in each pixel row group may be both independent and may not be multiplexed, to prevent the multiplexed data lines from transmitting data voltages to wrong pixels when the first pixels and the second pixels in one pixel row group are scanned at the same time.
In one embodiment, based on the data control circuit for achieving the control of the duration difference of the first pixels and the second pixels being connected to the data voltage, in one scanning driving circuit, the first sub scanning driving circuit and the second sub scanning driving circuit may output same driving waveforms, while scanning the pixels one by one in terms of timing. The present disclosure has no limit on this.
In one embodiment, the data control circuit 300 may include a plurality of first switch transistors M1, a plurality of second switch transistors M2, and a data voltage generating sub-circuit 310. In one first switch transistor M1 of the plurality of first switch transistors M1, a first terminal may be electrically connected to one corresponding first data line D1, a second terminal may be electrically connected to the data voltage generating sub-circuit 310, and a control terminal may be electrically connected to a first control signal terminal S1. In one of the plurality of second switch transistors M2, a first terminal may be electrically connected to one corresponding second data line D2, a second terminal may be electrically connected to the data voltage generating sub-circuit 310, and a control terminal may be electrically connected to a second control signal terminal S2.
When the first sub scanning driving circuits 21 and the second sub scanning driving circuits 22 control the corresponding pixels to be connected to the corresponding data lines, the conduction duration of the plurality of first switch transistors M1 controlled by the first control signal terminal S1 may be larger than the conduction duration of the plurality of second switch transistors M2 controlled by the second control signal terminal S2.
The data voltage generating sub-circuit 310 may be configured to generate a data voltage suitable for each row of pixels. When one first switch transistor M1 of the plurality of first switch transistor M1 is turned on, the data voltage may be transmitted to one first data line D1 connected to the first switch transistor M1 through the first switch transistor M1. When one second switch transistor M2 of the plurality of second switch transistor M2 is turned on, the data voltage may be transmitted to one second data line D2 connected to the second switch transistor M2 through the second switch transistor M2. When one first switch M1 or one second switch M2 is turned off, it may indicate that there is no data voltage transmission in one first data line D1 connected to the first switch transistor M1 or in one second data line D2 connected to the second switch transistor M2. Correspondingly, the conduction duration of the first switching transistor M1 and the second switching transistor M2 may be controlled to control the duration of the pixels connected to the data voltage.
The plurality of first switch transistors M1 and the plurality of second switch transistors M2 may be transistors, and the conduction type of any one of plurality of first switch transistors M1 and the plurality of second switch transistors M2 may be N-type or P-type. As shown in
In one embodiment, the conduction types of the plurality of first switch transistors M1 and the plurality of second switch transistors M2 may be same, to further facilitate the manufacture of switch transistors with the same conduction types on the basis of reducing the number of control signal terminals. The manufacturing process of the display device may be simplified.
It should be noted that the data control circuit may be an independently fabricated circuit or a circuit integrated in a driving chip of the display panel, which is not specifically limited by the present disclosure.
In another embodiment shown in
In one embodiment shown in
In one scanning driving circuit, the first sub scanning driving circuit 21 may be connected to all the first pixels 11 in one corresponding pixel row group, and the second sub scanning driving circuit 22 may be connected to all the second pixels 12 in the corresponding pixel row group. All the first pixels 12 in each pixel row group may be scanned at the same time, and all the second pixels 12 in each pixel row group may be scanned at the same time. Therefore, when there are many pixel rows in the pixel row group, scanning all the pixels in the pixel row group at the same time may result that the frame frequency is too large. In one embodiment of the present disclosure, the first pixels 11 and the second pixels 12 in one same pixel row group may be scanned in a time-division manner, to avoid the situation that the frame frequency of the display device is too fast. As shown in
Further, in some embodiments, the light-emitting time of the pixels may be controlled by the sub-pixel driving circuits, to enhance the light-emitting brightness of the first pixels. As shown in
As shown in
Alternatively, in another embodiment, as shown in
It should be noted that the present disclosure does not specifically limit the magnitude relationship between the first period T11 and the second period T12, which may be specifically designed according to actual applications.
It should be noted that the data line D3 may transmit the data voltage to the first pixels 11 and the second pixels 12 in a time-sharing manner. Therefore, the data writing stage K12 controlled by the first sub scanning driving circuit 21 and the data writing stage K22 controlled by the second sub scanning driving circuit 22 may not overlap in time. As shown in
The present disclosure also provides a display device. As shown in
In other embodiments, the display device may be a notebook, a tablet, a compute, a wearable device, and so on. The present disclosure has no limit on this.
In the display panel and the display device provided by the present disclosure, in the display device, the luminous efficiency of the corresponding color light of the first pixels may be lower than the luminous efficiency of the corresponding color light of the second pixels. Correspondingly, in at least one image frame displayed by the display device, the time during which one first pixel is connect to one corresponding first data line to transmit the data voltage controlled by one corresponding first sub scanning driving circuit may be configured to be longer than the time during which one second pixel is connect to one corresponding second data line to transmit the data voltage controlled by one corresponding second sub scanning driving circuit, therefore compensating the light-emitting brightness of the first pixel. The light-emitting brightness of the first pixel may be ensured to be high, and the uniformity of the light-emitting brightness of the first pixel and the second pixel may be improved. Problems such as smear or color cast of the display device may be avoided, and the display effect of the display device may be improved.
In the present disclosure, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the indicated devices or elements must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the disclosure.
In addition, the terms “first” and “second” appear for descriptive purposes only, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with “first”, “second” may expressly or implicitly include at least one of that feature. In the description of the present disclosure, “plurality” may mean at least two, such as two, three, etc., unless otherwise expressly and specifically defined.
In the present disclosure, unless otherwise expressly specified and limited, terms such as “installed”, “connected”, “connected to” and “fixed” should be understood in a broad sense. For example, it may be a fixed connection or a disassembled connection, or integrated. It may be a mechanical connection or an electrical connection, or may be a connection that is able to communicate with each other. It may be directly connected or indirectly connected through an intermediate medium. It can be the internal communication of two components or the interaction of the two components relationship, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure may be understood according to specific situations.
In the present disclosure, unless otherwise expressly specified and limited, a first feature “on” or “under” a second feature may be a direct contact between the first and second features, or the first and second features may be in an indirect contact through an intermedium. Also, the first feature being “above”, “over” and “on” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply mean that the first feature is higher than the second feature. The first feature being “below”, “under” or “beneath” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.
In the present disclosure, when the terms “one embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” etc. appear, they mean the specific features, structures, structures, materials or features described in the embodiments or examples may be included in at least one embodiment or example of the present disclosure. In the present disclosure, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.
Various embodiments have been described to illustrate the operation principles and exemplary implementations. It should be understood by those skilled in the art that the present disclosure is not limited to the specific embodiments described herein and that various other obvious changes, rearrangements, and substitutions will occur to those skilled in the art without departing from the scope of the disclosure. Thus, while the present disclosure has been described in detail with reference to the above described embodiments, the present disclosure is not limited to the above described embodiments, but may be embodied in other equivalent forms without departing from the scope of the present disclosure, which is determined by the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202210755110.3 | Jun 2022 | CN | national |
