Display panel and display device
By designing a structure of single-layer green, double-layer red and blue sub-pixels in the OLED display panel, and by adjusting the thickness of the hole transport layer and the electron generation layer, the dynamic blurring problem of the OLED display panel under low brightness was solved, achieving higher display clarity and consistency.
Patent Information
- Application Number
- CN202520663543.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-09
- Publication Date
- 2026-03-06
- Estimated Expiration
- 2035-04-09
AI Technical Summary
Existing OLED display panels are prone to motion blur at low brightness because the different capacitances and areas of the RGB sub-pixels result in inconsistent charging amounts and times. In particular, the green sub-pixels have the largest number of electrons and the longest charging time, causing refresh lag.
A structure with a single-layer green subpixel and two layers of red and blue subpixels is designed. By overlapping the first and second pixel layers, the electron quantity of the three colors of subpixels is approximately the same, and the charging time is similar. Hole transport layers and electron generation layers of different thicknesses are used to adjust the electron quantity.
It effectively avoids dynamic blurring caused by refresh lag in low brightness display panels, improving display clarity and consistency.
Smart Images
Figure CN223979015U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of display panels, and more specifically, to a display panel and a display device. Background Technology
[0002] Organic light-emitting diodes (OLEDs) are widely used in various consumer electronics products such as mobile phones, tablets, computers, televisions, digital cameras, and lighting due to their advantages such as high image quality, low power consumption, and wide color gamut, becoming the mainstream display panel in the display field.
[0003] The widespread adoption of OLED display panels has also led to increased consumer demands. One of the challenges for OLED is low-brightness motion blur. Specifically, low-brightness motion blur is caused by the different capacitances and areas of the red, green, and blue (RGB) sub-pixels. This results in inconsistent charging amounts and times for the three color sub-pixels in the first frame when the displayed image changes. Consequently, sub-pixels with higher charging amounts and longer charging times light up later, creating a ghosting effect. Furthermore, the green sub-pixels have the highest electron quantity and the longest charging time, causing a delay in the first frame refresh, thus resulting in low-brightness motion blur.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] In view of this, the present disclosure provides a display panel and a display device to at least solve the problem of motion blur under low brightness in existing display panels.
[0006] In one aspect, embodiments of this disclosure provide a display panel, including:
[0007] First electrode layer;
[0008] The first pixel layer is located on one side of the first electrode layer and includes multiple red and blue base pixels.
[0009] The second pixel layer is located on the side of the first pixel layer away from the first electrode layer. The second pixel layer includes multiple red top pixels, blue top pixels and green sub-pixels. The red bottom pixels and red top pixels overlap based on the projection of the first electrode layer, and the blue bottom pixels and blue top pixels overlap based on the projection of the first electrode layer.
[0010] The second electrode layer is located on the side of the second pixel layer that is away from the first pixel layer.
[0011] In some embodiments, a red bottom pixel and a red top pixel, based on the overlapping projections of the first electrode layer, constitute a red sub-pixel;
[0012] A blue sub-pixel is formed by a blue bottom pixel and a blue top pixel based on the projection overlap of the first electrode layer;
[0013] The red, blue, and green sub-pixels together constitute the luminous pixel.
[0014] In some embodiments, the display panel further includes:
[0015] The hole transport layer is located between the first electrode layer and the first pixel layer. The thickness of the hole transport layer overlapping with the green sub-pixel is greater than the thickness of the hole transport layer overlapping with the red or blue sub-pixel.
[0016] In some embodiments, the thickness of the hole transport layer overlapping the red sub-pixel is
[0017] The thickness of the hole transport layer in the overlapping area with the green sub-pixel is
[0018] The thickness of the hole transport layer in the overlapping area with the blue sub-pixel is
[0019] In some embodiments, the electron quantity of the red sub-pixel, blue sub-pixel, and green sub-pixel is 1.0×10^-9V*F to 1.4×10^-9V*F.
[0020] In some embodiments, the display panel further includes:
[0021] An electron generation layer is located between the first pixel layer and the second pixel layer. The electron generation layer does not overlap with the green sub-pixel based on the projection of the first electrode layer.
[0022] In some embodiments, the display panel further includes:
[0023] An electron transport layer is located between the second pixel layer and the second electrode layer.
[0024] In some embodiments, the hole transport layer includes a plurality of hole transport units, each of which is electrically connected to one of the red sub-pixel, blue sub-pixel, and green sub-pixel.
[0025] In some embodiments, the first electrode layer is an anode layer, and the anode layer includes a plurality of anodes, each anode being electrically connected to each hole transport section;
[0026] The second electrode layer is a cathode layer, which is electrically connected to each red sub-pixel, blue sub-pixel, and green sub-pixel.
[0027] On the other hand, embodiments of this disclosure also provide a display device including the display panel of any of the above.
[0028] Compared with the prior art, this disclosure has at least the following technical effects:
[0029] The display panel and display device disclosed herein, by setting a first pixel layer and a second pixel layer in the display panel, wherein the first pixel layer does not have green sub-pixels, and the red bottom pixel of the first pixel layer and the red top pixel of the second pixel layer overlap based on the projection of the first electrode layer, and the blue bottom pixel of the first pixel layer and the blue top pixel of the second pixel layer overlap based on the projection of the first electrode layer, that is, designing a display panel composed of a single layer of green sub-pixels, two layers of red sub-pixels and two layers of blue sub-pixels, so that the electron quantity of the three colors of the sub-pixels of the display panel is approximately the same and the charging time is similar, which can avoid the refresh lag of the first frame when the display content of the display panel changes, and thus avoid dynamic blur of the display panel at low brightness. Attached Figure Description
[0030] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.
[0031] Figure 1 This is a schematic diagram of the structure of a display panel provided in this disclosure;
[0032] Figure 2 This is a schematic diagram of the structure of a display device provided in this disclosure.
[0033] Figure label:
[0034] 100 Display Panel
[0035] 110 First Electrode Layer
[0036] 111 Anode
[0037] 120 First pixel layer
[0038] 121 red background pixels
[0039] 122 blue background pixels
[0040] 130 Second pixel layer
[0041] 131 Red top pixel
[0042] 132 blue top pixels
[0043] 133 green subpixels
[0044] 140 Second electrode layer
[0045] 150 Hole transport layer
[0046] 151 Hole Transport Unit
[0047] 160 electron generation layer
[0048] 170 Electron Transport Layer
[0049] 200 display devices Detailed Implementation
[0050] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.
[0051] The use of terms such as "first," "second," and similar terms in the specific description does not indicate any order, quantity, or importance, but is merely used to distinguish different components. Furthermore, in the description of this disclosure, the terms "upper," "lower," etc., indicate orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings. These are for ease of description only and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.
[0052] It should be noted that, unless otherwise specified, the embodiments of this disclosure and the features in different embodiments can be combined with each other.
[0053] On one hand, such as Figure 1 As shown, an embodiment of this disclosure provides a display panel 100, including: a first electrode layer 110, a first pixel layer 120, a second pixel layer 130, and a second electrode layer 140. The first pixel layer 120 is located on one side of the first electrode layer 110. The second pixel layer 130 is located on the side of the first pixel layer 120 opposite to the first electrode layer 110. The second electrode layer 140 is located on the side of the second pixel layer 130 opposite to the first pixel layer 120.
[0054] Specifically, the first pixel layer 120 includes multiple red base pixels 121 and blue base pixels 122. That is, the first pixel layer 120 does not include green pixels. The second pixel layer 130 includes multiple red top pixels 131, blue top pixels 132, and green sub-pixels 133. That is, the second pixel layer 130 includes sub-pixels of all three colors.
[0055] Furthermore, the red bottom pixel 121 of the first pixel layer 120 and the red top pixel 131 of the second pixel layer 130 overlap based on the projection of the first electrode layer 110, and the blue bottom pixel 122 of the first pixel layer 120 and the blue top pixel 132 of the second pixel layer 130 overlap based on the projection of the first electrode layer 110. The red bottom pixel 121 and the red top pixel 131, which overlap based on the projection of the first electrode layer 110, are electrically connected; the blue bottom pixel 122 and the blue top pixel 132, which overlap based on the projection of the first electrode layer 110, are also electrically connected.
[0056] This embodiment sets up a first pixel layer 120 and a second pixel layer 130 in the display panel 100. The first pixel layer 120 does not have a green sub-pixel 133. The red bottom pixel 121 of the first pixel layer 120 and the red top pixel 131 of the second pixel layer 130 overlap based on the projection of the first electrode layer 110. The blue bottom pixel 122 of the first pixel layer 120 and the blue top pixel 132 of the second pixel layer 130 overlap based on the projection of the first electrode layer 110. That is, a display panel 100 composed of a single layer of green sub-pixels 133, two layers of red sub-pixels and two layers of blue sub-pixels is designed. This makes the electron quantity of the three colors of the sub-pixels of the display panel 100 approximately the same and the charging time similar. This can avoid the refresh lag of the first frame when the display content of the display panel 100 changes, and thus avoid the dynamic blur of the display panel 100 at low brightness.
[0057] In some embodiments, a red bottom pixel 121 and a red top pixel 131, based on the overlapping projections of the first electrode layer 110, constitute a red sub-pixel; a blue bottom pixel 122 and a blue top pixel 132, based on the overlapping projections of the first electrode layer 110, constitute a blue sub-pixel; the red sub-pixel, blue sub-pixel, and green sub-pixel 133 together constitute a light-emitting pixel. This embodiment, through the above configuration, designs a display panel 100 composed of a single-layer green sub-pixel 133, two layers of red sub-pixels, and two layers of blue sub-pixels. This ensures that the electron quantities of the red, green, and blue sub-pixels of the display panel 100 are approximately the same, and their charging times are similar. This avoids refresh lag in the first frame when the displayed content of the display panel 100 changes, thereby preventing dynamic blurring of the display panel 100 at low brightness.
[0058] In some embodiments, continue to refer to Figure 1The display panel 100 also includes a hole transport layer 150. The hole transport layer 150 is located between the first electrode layer 110 and the first pixel layer 120. The thickness of the hole transport layer 150 overlapping with the green sub-pixel 133 is greater than the thickness of the hole transport layer 150 overlapping with the red or blue sub-pixel. Specifically, the hole transport layer 150 is typically made of an organic material with high hole mobility (such as NPB, TCTA, etc.). The hole transport layer 150 is responsible for efficiently transporting holes injected by the anode 111 to the light-emitting sub-pixels of the first pixel layer 120 and the second pixel layer 130. In this embodiment, by setting the thickness of the hole transport layer 150 as described above, the electron quantity of the three color sub-pixels of the display panel 100 is approximately the same, and the charging time is similar, thereby avoiding dynamic blurring of the display panel 100 at low brightness.
[0059] In some embodiments, the thickness of the hole transport layer 150 overlapping with the red sub-pixel is The thickness of the hole transport layer 150 overlapping with the green sub-pixel 133 is The thickness of the hole transport layer 150 overlapping with the blue sub-pixel is Specifically, the thickness of the hole transport layer 150 overlapping with the red sub-pixel can be... or Any value in the range is acceptable, and this disclosure does not limit this. The thickness of the hole transport layer 150 overlapping with the green sub-pixel 133 can be... or Any value in the range is acceptable, and this disclosure does not limit this. The thickness of the hole transport layer 150 overlapping with the blue sub-pixel can be... or Any value in the above, this disclosure does not limit. In this embodiment, by setting the thickness of the hole transport layer 150 as described above, the electron quantity of the sub-pixels of the three colors of the display panel 100 is approximately the same, and the charging time is similar, thereby avoiding dynamic blurring of the display panel 100 at low brightness.
[0060] In some embodiments, the electron quantity of the red, blue, and green sub-pixels 133 is all between 1.0 × 10⁻⁹ V*F and 1.4 × 10⁻⁹ V*F. Specifically, the electron quantity of the red sub-pixel can be any value among 1.0 × 10⁻⁹ V*F, 1.1 × 10⁻⁹ V*F, 1.2 × 10⁻⁹ V*F, 1.3 × 10⁻⁹ V*F, or 1.4 × 10⁻⁹ V*F, and this disclosure does not impose any limitation on this. The electron quantity settings of the blue and green sub-pixels 133 can be the same as those of the red sub-pixels, and will not be repeated here. In this embodiment, by setting the electron quantity of the red, blue, and green sub-pixels 133 as described above, the electron quantity of the three color sub-pixels of the display panel 100 is approximately the same, and the charging time is similar, thereby avoiding dynamic blurring of the display panel 100 at low brightness.
[0061] In some embodiments, continue to refer to Figure 1 The display panel 100 also includes an electron generation layer 160. The electron generation layer 160 is located between the first pixel layer 120 and the second pixel layer 130, and does not overlap with the green sub-pixel 133 based on the projection of the first electrode layer 110. The electron generation layer 160 is a functional layer designed using photosensitive materials or a specific band structure to efficiently generate free electrons (electron-hole pairs) within the display panel 100. Specifically, the dual-layer red sub-pixel and the dual-layer blue sub-pixel are electrically connected at least through the electron generation layer 160; however, the single-layer green sub-pixel 133 does not require the electron generation layer 160, therefore, the green sub-pixel 133 is not provided with the electron generation layer 160.
[0062] In some embodiments, continue to refer to Figure 1 The display panel 100 also includes an electron transport layer 170. The electron transport layer 170 is located between the second pixel layer 130 and the second electrode layer 140. The electron transport layer 170 is a functional layer in the display panel 100 specifically responsible for the directional transport of charge carriers.
[0063] In some embodiments, continue to refer to Figure 1 The hole transport layer 150 includes a plurality of hole transport units 151, each of which is electrically connected to one of the red, blue, and green sub-pixels 133. That is, the hole transport layer 150 is composed of a plurality of independent hole transport units 151, and each hole transport unit 151 controls one light-emitting sub-pixel independently.
[0064] In some embodiments, continue to refer to Figure 1The first electrode layer 110 is an anode layer 111, which includes multiple anodes 111, each of which is electrically connected to each hole transport section 151. The second electrode layer 140 is a cathode layer, which is electrically connected to each red, blue, and green sub-pixel 133. That is, the anode layer 111 is composed of multiple independent anodes 111, and each anode 111 individually controls one light-emitting sub-pixel. The cathode layer is a complete film layer that controls all light-emitting sub-pixels.
[0065] In some optional embodiments, the display panel 100 may be an organic light-emitting diode (OLED) display panel 100 or an active-matrix organic light-emitting diode (AMOLED) display panel 100, etc., and this disclosure does not impose any limitations. The display panel 100 described above uses an OLED display panel 100 as an example to illustrate some embodiments of this application. It is readily understood that the implementation methods of this application are not limited to these examples.
[0066] On the other hand, such as Figure 2 As shown, embodiments of this disclosure also provide a display device 200. The display device 200 includes the display panel 100 provided in any embodiment of this disclosure. The display device 200 provided in embodiments of this disclosure can be... Figure 2 The mobile phone shown can also be any electronic product with display function, including but not limited to the following categories: television, laptop, desktop monitor, tablet, digital camera, smart bracelet, smart glasses, in-vehicle display, medical equipment, industrial control equipment, touch interactive terminal, etc., and the embodiments disclosed herein do not impose any special limitations on this.
[0067] For details on the specific implementation and technical effects of the display device 200 disclosed herein, please refer to the specific embodiments of the display panel 100 described above. Repeated descriptions will not be repeated.
[0068] In summary, the display panel and display device disclosed herein, by setting a first pixel layer and a second pixel layer in the display panel, wherein the first pixel layer does not have green sub-pixels, and the red bottom pixel of the first pixel layer and the red top pixel of the second pixel layer overlap based on the projection of the first electrode layer, and the blue bottom pixel of the first pixel layer and the blue top pixel of the second pixel layer overlap based on the projection of the first electrode layer, that is, designing a display panel composed of a single layer of green sub-pixels, two layers of red sub-pixels and two layers of blue sub-pixels, makes the electron quantity of the three colors of the sub-pixels of the display panel approximately the same and the charging time similar, which can avoid the refresh lag of the first frame when the display content of the display panel changes, and thus avoid dynamic blur of the display panel at low brightness.
[0069] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this disclosure and should not be construed as limiting the specific implementation of this disclosure to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this disclosure, and all such modifications and substitutions should be considered within the scope of protection of this disclosure.
Claims
1. A display panel, characterized by, Comprising: a first electrode layer; a first pixel layer, the first pixel layer being located on one side of the first electrode layer, the first pixel layer comprising a plurality of red bottom pixels and blue bottom pixels; a second pixel layer, the second pixel layer being located on a side of the first pixel layer away from the first electrode layer, the second pixel layer comprising a plurality of red top pixels, blue top pixels and green sub-pixels; one of the red bottom pixels and one of the red top pixels overlap based on projection of the first electrode layer, one of the blue bottom pixels and one of the blue top pixels overlap based on projection of the first electrode layer; a second electrode layer, the second electrode layer being located on a side of the second pixel layer away from the first pixel layer.
2. The display panel according to claim 1, wherein: one of the red bottom pixels and one of the red top pixels overlap based on projection of the first electrode layer form a red sub-pixel; one of the blue bottom pixels and one of the blue top pixels overlap based on projection of the first electrode layer form a blue sub-pixel; the red sub-pixel, the blue sub-pixel and the green sub-pixel together form a light-emitting pixel.
3. The display panel of claim 2, wherein, Further comprising: a hole transport layer, the hole transport layer being located between the first electrode layer and the first pixel layer, a thickness of the hole transport layer overlapping with the green sub-pixel is greater than a thickness of the hole transport layer overlapping with the red sub-pixel or the blue sub-pixel.
4. The display panel according to claim 3, wherein: The thickness of the hole transport layer overlapping with the red sub-pixel is The thickness of the hole transport layer overlapping with the green sub-pixel is 5-30 nm The thickness of the hole transport layer overlapping with the blue sub-pixel is 5. The display panel according to claim 4, wherein: an electron quantity of the red sub-pixel, the blue sub-pixel and the green sub-pixel is 1.0*10^-9V*F~1.4*10^-9V*F.
6. The display panel of claim 2, wherein, Further comprising: an electron generation layer, the electron generation layer being located between the first pixel layer and the second pixel layer, the electron generation layer does not overlap with the green sub-pixel based on projection of the first electrode layer.
7. The display panel of claim 1, wherein, Further comprising: an electron transport layer, the electron transport layer being located between the second pixel layer and the second electrode layer.
8. The display panel according to claim 3, wherein: the hole transport layer comprises a plurality of hole transport portions, each of the hole transport portions is electrically connected with one of the red sub-pixel, the blue sub-pixel and the green sub-pixel.
9. The display panel according to claim 8, wherein: the first electrode layer is an anode layer, the anode layer comprises a plurality of anodes, each of the anodes is electrically connected with each of the hole transport portions; the second electrode layer is a cathode layer, the cathode layer is electrically connected with each of the red sub-pixel, the blue sub-pixel and the green sub-pixel.
10. A display device, characterized by comprising: Comprising the display panel according to any one of claims 1 to 9.