Display panel and display apparatus
By employing a combination of liquid crystal display module and liquid crystal dimming module in the liquid crystal display, and utilizing the different active and passive driving methods, pixel-level fine-grained dimming is achieved, solving the problem of high cost in existing technologies, improving contrast and reducing production costs.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- TCL CHINA STAR OPTOELECTRONICS TECHNOLOGY CO LTD
- Filing Date
- 2024-11-14
- Publication Date
- 2026-05-15
AI Technical Summary
Existing local dimming technology in LCD displays suffers from high cost and difficulty in implementation, making it difficult to reduce costs while improving contrast.
It adopts a combination structure of liquid crystal display module and liquid crystal dimming module. The dimming sub-pixels on the liquid crystal dimming module are set one-to-one with the display sub-pixels and use different driving methods. The display sub-pixels are driven by active driving and the dimming sub-pixels are driven by passive driving, so as to realize fine-grained dimming at the pixel level.
It improves the contrast of LCD displays while reducing production costs, and achieves more efficient backlight zoning control by reducing the number of photomasks and processes.
Smart Images
Figure CN2024132115_15052026_PF_FP_ABST
Abstract
Description
Display panel and display device
[0001] This application claims priority to Chinese patent application No. 202411582216.3, filed on November 6, 2024, the entire contents of which are incorporated herein by reference. Technical Field
[0002] This application relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology
[0003] With the development of display technology, people are becoming increasingly reliant on information exchange and transmission, and the application of low-power, high-contrast liquid crystal displays (LCDs) will gradually increase.
[0004] Local dimming technology refers to dividing the backlight into multiple zones and independently controlling the brightness of each zone to improve the contrast of an LCD display. However, due to limitations in the size of the light-emitting diodes (LEDs) in the backlight and the complex design of the driving circuit, existing local dimming technologies suffer from high costs and are difficult to implement in commercial applications. Invention Overview
[0005] This application provides a display panel and display device to improve the contrast of a liquid crystal display while reducing costs.
[0006] The technical solution provided in this application is as follows:
[0007] In a first aspect, embodiments of this application provide a display panel, which includes:
[0008] A liquid crystal display module, the liquid crystal display module comprising a plurality of display sub-pixels arranged in an array, the plurality of display sub-pixels being arranged in a row of sub-pixels in a first direction and in a column of sub-pixels in a second direction, the second direction being different from the first direction;
[0009] A liquid crystal dimming module is disposed on the light-emitting side of the liquid crystal display module. The liquid crystal dimming module includes a plurality of dimming sub-pixels arranged in an array, and the dimming sub-pixels are configured in a one-to-one correspondence with the display sub-pixels.
[0010] The driving method of the display sub-pixel is different from that of the dimming sub-pixel. The driving method of the display sub-pixel is set to active driving, while the driving method of the dimming sub-pixel is set to passive driving.
[0011] Secondly, embodiments of this application also provide a display device, which includes:
[0012] Backlight module;
[0013] In one of the aforementioned embodiments, the display panel is disposed opposite to the backlight module, and the liquid crystal dimming module is located on the side of the liquid crystal display module away from the backlight module. Attached Figure Description
[0014] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0015] Figure 1 is a schematic diagram showing the relative positions of various structures on the display device provided in the embodiment of this application.
[0016] Figure 2 is a cross-sectional structural diagram of the display sub-pixel and dimming sub-pixel opposite to each other in Figure 1.
[0017] Figure 3 is a schematic diagram of a planar structure of the first electrode in Figure 2.
[0018] Figure 4 is a schematic diagram showing the detailed structure of the third substrate in Figure 2.
[0019] Figure 5 is a schematic diagram of another cross-sectional structure of the display sub-pixel and dimming sub-pixel opposite to each other in Figure 1. Embodiments of the present invention
[0020] The following descriptions of the embodiments are based on the accompanying illustrations, illustrating specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustration and understanding of this application, and not for limiting this application. In the figures, structurally similar units are denoted by the same reference numerals. In the figures, the thickness of some layers and regions is exaggerated for clarity and ease of description. That is, the dimensions and thicknesses of each component shown in the figures are arbitrarily shown, but this application is not limited thereto.
[0021] Please refer to Figures 1 to 4. Figure 1 is a schematic diagram showing the relative positions of various structures on the display device provided in the embodiment of this application. Figure 2 is a cross-sectional structural schematic diagram of the opposing display sub-pixels and dimming sub-pixels in Figure 1. Figure 3 is a planar structural schematic diagram of the first electrode in Figure 2. Figure 4 is a detailed structural schematic diagram of the third substrate in Figure 2. Referring to Figure 1, the display device 100 includes a backlight module 10 and a display panel 2 disposed opposite to the backlight module 10. Exemplarily, the display device 100 can be a device with a display screen, such as a television, mobile phone, tablet computer, computer monitor, gaming device, digital camera, car navigation system, ATM, wearable device, etc.
[0022] The display panel 2 includes a liquid crystal display module 20 and a liquid crystal dimming module 30 disposed on the light-emitting side of the backlight module 10. The liquid crystal dimming module 30 is disposed between the liquid crystal display module 20 and the backlight module 10. That is, the liquid crystal dimming module 30 is located on the side of the liquid crystal display module 20 away from the backlight module 10; in other words, the liquid crystal dimming module 30 is located on the light-emitting side of the liquid crystal display module 20.
[0023] The liquid crystal display module 20 is used to display images, and the light-emitting side of the liquid crystal display module 20 is the side of the image displayed by the liquid crystal display module 20. The backlight module 10 is used to provide backlight to the liquid crystal display module 20, and the liquid crystal dimming module 30 is used to divide the backlight of the backlight module 10 into zones and provide the zoned backlight to the liquid crystal display module 20 to improve the contrast of the liquid crystal display module 20. The light source of the backlight module 10 can be side-lit or direct-lit. Taking the backlight module 10 as an example of a direct-lit light source, the backlight module 10 includes a back plate and optical structures such as a lamp plate, reflector, diffuser plate, and prism sheet disposed in the receiving cavity of the back plate.
[0024] The liquid crystal display module 20 includes a plurality of arrayed display sub-pixels SP1. The plurality of display sub-pixels SP1 are arranged in a sub-pixel row along a first direction X, and in a sub-pixel column along a second direction Y. Every three adjacent display sub-pixels SP1 constitute a pixel. The three display sub-pixels SP1 within each pixel can display different colors to achieve color display of the pixel. For example, the three display sub-pixels SP1 within each pixel can display red, green, and blue, respectively. The first direction X and the second direction Y are different; for example, the first direction X and the second direction Y may be perpendicular. However, this application is not limited to this; the first direction X and the second direction Y may also intersect at other angles.
[0025] The liquid crystal dimming module 30 includes a plurality of dimming sub-pixels SP2 arranged in an array, and each dimming sub-pixel SP2 is configured in a one-to-one correspondence with a display sub-pixel SP1. That is, the plurality of dimming sub-pixels SP2 are arranged in a sub-pixel row in the first direction X, and the plurality of dimming sub-pixels SP2 are arranged in a sub-pixel column in the second direction Y. Each dimming sub-pixel SP2 is configured in correspondence with one display sub-pixel SP1. The dimming sub-pixel SP2 controls whether the backlight of the backlight module 10 passes through, so as to provide backlight to the corresponding display sub-pixel SP1. For example, when the display sub-pixel SP1 needs to be lit, the dimming sub-pixel SP2 corresponding to the display sub-pixel SP1 allows the backlight of the backlight module 10 to pass through, providing backlight to the display sub-pixel SP1; when the display sub-pixel SP1 does not need to be lit, the dimming sub-pixel SP2 corresponding to the display sub-pixel SP1 blocks the backlight of the backlight module 10, making the black screen displayed by the display sub-pixel SP1 even darker. This allows for pixel-level partitioning of the backlight, making the partitioning more precise and thus improving contrast.
[0026] The driving method of the display sub-pixel SP1 differs from that of the dimming sub-pixel SP2. The display sub-pixel SP1 is driven by active driving, while the dimming sub-pixel SP2 is driven by passive driving. It should be noted that active driving refers to active matrix driving, which controls the display of each sub-pixel by placing an active element, such as a thin-film transistor 212, on each sub-pixel in the display matrix. Passive driving refers to passive matrix driving, which directly controls the display of sub-pixels through control signal traces, eliminating the need for active elements on each sub-pixel. This results in a simpler structure, reducing the number of photomasks and manufacturing processes, and lowering costs.
[0027] In this embodiment, by setting the liquid crystal dimming module 30 between the liquid crystal display module 20 and the backlight module 10, and configuring the dimming sub-pixels SP2 on the liquid crystal dimming module 30 in a one-to-one correspondence with the display sub-pixels SP1 on the liquid crystal display module 20, pixel-level partitioning of the backlight can be achieved, making the backlight partitioning more refined and thus improving contrast. Simultaneously, the dimming sub-pixels SP2 employ a passive driving method, which can reduce the number of photomasks and manufacturing processes, thereby improving contrast while also reducing costs.
[0028] The following describes in detail the specific structure of the liquid crystal display module 20 and the liquid crystal dimming module 30, taking a display sub-pixel SP1 and a dimming sub-pixel SP2 as examples.
[0029] Referring to Figure 2, which schematically illustrates the film structure of a display sub-pixel SP1 and a dimming sub-pixel SP2 correspondingly disposed on the liquid crystal display module 20 and the liquid crystal dimming module 30, the structures of the display sub-pixel SP1 and the dimming sub-pixel SP2 in this application are not limited thereto. The dimming sub-pixel SP2 includes a first electrode 312. The liquid crystal dimming module 30 includes a first substrate 31 and a second substrate 32 disposed opposite to each other, and a first liquid crystal layer 33 disposed between the first substrate 31 and the second substrate 32. The second substrate 32 is located on the side of the first substrate 31 away from the backlight module 10.
[0030] The first substrate 31 includes a first substrate 311 and a plurality of first electrodes 312 arranged in an array on the first substrate 311, each first electrode 312 corresponding to one of the dimming sub-pixels SP2. The first substrate 31 also includes a plurality of control signal lines 313 disposed between the first substrate 311 and the first electrodes 312, each control signal line 313 being electrically connected to one of the first electrodes 312 for providing electrical signals to the first electrodes 312 to realize passive driving of the dimming sub-pixels SP2.
[0031] The second substrate 32 is disposed opposite to the first substrate 31, and the second substrate 32 is located on the side of the first electrode 312 away from the first substrate 311. The second substrate 32 includes a second substrate 321 and a second electrode 322 disposed on the side of the second substrate 321 facing the first electrode 312. After an electrical signal is applied, an electric field is formed between the second electrode 322 and the first electrode 312. The materials of the second electrode 322 and the first electrode 312 can be the same, such as indium tin oxide (ITO) or other transparent conductive materials.
[0032] Optionally, the second substrate 321 and the first substrate 311 are made of the same material. For example, the second substrate 321 and the first substrate 311 can be rigid substrates or flexible substrates. When the second substrate 321 and the first substrate 311 are rigid substrates, they can include rigid transparent substrates such as glass substrates, quartz substrates or silicon wafers. When the second substrate 321 and the first substrate 311 are flexible substrates, they can include flexible transparent substrates such as polyimide (PI) film, ultrathin glass film, polyethylene terephthalate (PET), and triacetyl cellulose (TAC).
[0033] The first liquid crystal layer 33 is disposed between the first electrode 312 and the second electrode 322, and the first liquid crystal layer 33 includes first liquid crystal molecules 331. The first liquid crystal molecules 331 are deflected under the action of the electric field between the first electrode 312 and the second electrode 322, changing their alignment state to control the backlight transmittance of the backlight module 10.
[0034] The liquid crystal dimming module 30 further includes a first sealant 34 and a first support post 35 disposed between the first substrate 31 and the second substrate 32. The first sealant 34 surrounds the first liquid crystal layer 33. The first support post 35 is connected between the first electrode 312 and the second electrode 322 to control the liquid crystal cell thickness of the liquid crystal dimming module 30.
[0035] Referring to Figures 2 and 3, the first substrate 31 further includes a first insulating layer 314, which is located between the control signal trace 313 and the first electrode 312. A via is provided on the first insulating layer 314, and the first electrode 312 located within the via of the first insulating layer 314 contacts and is electrically connected to the control signal trace 313. Optionally, the first insulating layer 314 may be silicon nitride (SiNx), silicon oxide (SiOx), or a stack of silicon nitride and silicon oxide.
[0036] In one embodiment, each first electrode 312 includes at least one first sub-electrode 3121 and at least one second sub-electrode 3122, the first sub-electrode 3121 and the second sub-electrode 3122 being spaced apart in a first direction X. The control signal trace 313 includes a first sub-signal trace 3131 and a second sub-signal trace 3132, the first sub-signal trace 3131 being electrically connected to the first sub-electrode 3121, and the second sub-signal trace 3132 being electrically connected to the second sub-electrode 3122. The first insulating layer 314 has a first via 3141 at a position corresponding to the first sub-signal trace 3131 and a second via 3142 at a position corresponding to the second sub-signal trace 3132. A portion of the first sub-electrode 3121 is located within the first via 3141 and contacts and is electrically connected to the first sub-signal trace 3131, and a portion of the second sub-electrode 3122 is located within the second via 3142 and contacts and is electrically connected to the second sub-signal trace 3132.
[0037] The first sub-signal trace 3131 and the second sub-signal trace 3132 are insulated from each other, meaning that the electrical signals on the first sub-signal trace 3131 and the second sub-signal trace 3132 are different. This allows the first sub-electrode 3121 and the second sub-electrode 3122 to be controlled independently. Consequently, the deflection angle of the first liquid crystal molecule 331 in the corresponding area of the first sub-electrode 3121 and the second sub-electrode 3122 can be adjusted separately to control the light transmittance.
[0038] Thus, when the liquid crystal display module 20 requires a wide viewing angle, an electrical signal is applied to both the first sub-electrode 3121 and the second sub-electrode 3122, allowing light to pass through the areas corresponding to the first sub-electrode 3121 and the second sub-electrode 3122; when the liquid crystal display module 20 requires a narrow viewing angle to achieve a privacy function, an electrical signal is applied to the second sub-electrode 3122, while no electrical signal is applied to the first sub-electrode 3121, allowing light to pass through the area corresponding to the second sub-electrode 3122, while no light passes through the area corresponding to the first sub-electrode 3121.
[0039] Optionally, the first sub-electrode 3121 includes multiple dimming domain regions, and the deflection angle of the first liquid crystal molecules 331 corresponding to different dimming domain regions is different, so as to increase the light emission angle of the dimming sub-pixel SP2. The number of dimming domain regions of the first sub-electrode 3121 is greater than the number of dimming domain regions of the second sub-electrode 3122, so that the light emission angle of the corresponding area of the first sub-electrode 3121 is greater than the light emission angle of the corresponding area of the second sub-electrode 3122. Thus, when a wide viewing angle display is required, since the first sub-electrode 3121 includes multiple dimming domain regions, the light emission angle can be further increased, thereby increasing the viewing angle; while when a privacy protection function is required, since the second sub-electrode 3122 has fewer dimming domain regions and a smaller light emission angle, the light emission angle can be converged, thereby reducing the viewing angle.
[0040] The first sub-electrode 3121 has multiple slits 3120 within each of the dimming domains. The slits 3120 in adjacent dimming domains extend in different directions, for example, the slits 3120 in adjacent dimming domains are symmetrically arranged. The slits 3120 are the hollow structures on the first sub-electrode 3121. Specifically, the first sub-electrode 3121 may include a main electrode, a border electrode, and branch electrodes. The main electrode extends along the first direction X, and the border electrode surrounds the main electrode. The main electrode divides the first sub-electrode 3121 into multiple dimming domains. The branch electrodes are located within the dimming domains and are connected to the main electrode and the border electrode. The gap between adjacent branch electrodes is the slit 3120. The angle between the slit 3120 and the first direction X ranges from 0° to 45°, for example, it can be 7°, to better increase the light emission angle of the corresponding area of the first sub-electrode 3121.
[0041] The number of first sub-electrodes 3121 is greater than the number of second sub-electrodes 3122, and the second sub-electrodes 3122 are located between two adjacent first sub-electrodes 3121. First sub-signal traces 3131 and second sub-signal traces 3132 are spaced apart in the second direction Y, and both the first sub-electrodes 3121 and second sub-electrodes 3122 are located between the first sub-signal traces 3131 and second sub-signal traces 3132. The end of a first sub-electrode 3121 near the first sub-signal trace 3131 extends beyond the end of a second sub-electrode 3122 to be electrically connected to the first sub-signal trace; correspondingly, the end of a second sub-electrode 3122 near the second sub-signal trace 3132 extends beyond the end of a first sub-electrode 3121 to be electrically connected to the second sub-signal trace.
[0042] In one embodiment, referring to FIG3, the number of first sub-electrodes 3121 is 2, and the number of second sub-electrodes 3122 is 1. The two first sub-electrodes 3121 are symmetrically arranged about the second sub-electrode 3122. Each first sub-electrode 3121 includes two dimming domains, such as a first dimming domain DM1 and a second dimming domain DM2. The first dimming domain DM1 and the second dimming domain DM2 are symmetrically arranged about the median line P-P' of the first sub-electrode 3121. Each second sub-electrode 3122 includes one dimming domain. By setting the second sub-electrode 3122 as a single domain, the light emission angle of the corresponding area of the second sub-electrode 3122 can be further reduced, achieving a better privacy protection effect. In addition, since the second sub-electrode 3122 adopts a single-domain design, the first support post 35 can be set on the side of the second sub-electrode 3122 closer to the second electrode 322 to improve the stability of the first support post 35.
[0043] Referring again to FIG2, the liquid crystal display module 20 includes a third substrate 21 and a fourth substrate 22 disposed opposite to each other, and a second liquid crystal layer 23 disposed between the third substrate 21 and the fourth substrate 22. The fourth substrate 22 is located on the side of the third substrate 21 away from the backlight module 10.
[0044] The third substrate 21 is disposed on the side of the second substrate 32 away from the first substrate 31. The third substrate 21 includes a third substrate 211 and a plurality of transistors 212 and a third electrode 213 disposed on the third substrate 211. Each display sub-pixel SP1 includes at least one transistor 212 and one third electrode 213, and the third electrode 213 is connected to the transistor 212. The transistor 212 is used to provide a driving signal to the third electrode 213 to realize the active driving of the display sub-pixel SP1.
[0045] The fourth substrate 22 is disposed on the side of the third substrate 21 away from the second substrate 32. The fourth substrate 22 includes a fourth substrate 221 and a fourth electrode 222 disposed on the fourth substrate 221 facing the third electrode 213. After an electrical signal is applied, an electric field is formed between the fourth electrode 222 and the third electrode 213. The fourth electrode 222 and the third electrode 213 can be made of the same material, such as indium tin oxide (ITO) or other transparent conductive materials. Optionally, the fourth substrate 221 and the third substrate 211 are made of the same material. For example, the fourth substrate 221 and the third substrate 211 can be rigid substrates or flexible substrates. When the fourth substrate 221 and the third substrate 211 are rigid substrates, they can include rigid transparent substrates such as glass substrates, quartz substrates, or silicon wafers. When the fourth substrate 221 and the third substrate 211 are flexible substrates, they can include flexible transparent substrates such as polyimide (PI) films, ultrathin glass films, polyethylene terephthalate (PET), and triacetyl cellulose (TAC).
[0046] The second liquid crystal layer 23 is disposed between the third electrode 213 and the fourth electrode 222, and the second liquid crystal layer 23 includes second liquid crystal molecules 231. The second liquid crystal molecules 231 are deflected under the action of the electric field between the third electrode 213 and the fourth electrode 222, changing their alignment state, so as to control the transmittance of the backlight after passing through the liquid crystal dimming module 30, thereby realizing the display function.
[0047] Accordingly, the liquid crystal display module 20 further includes a second sealant 24 and a second support post 25 disposed between the third substrate 21 and the fourth substrate 22. The second sealant 24 surrounds the second liquid crystal layer 23. The second support post 25 is connected between the third electrode 213 and the fourth electrode 222 to control the cell thickness of the liquid crystal display module 20.
[0048] Of course, to achieve color display in the liquid crystal display module 20, the liquid crystal display module 20 further includes a color filter layer. The color filter layer is disposed on the third substrate 21 or the fourth substrate 22. For example, when the color filter layer is disposed on the third substrate 21, the color filter layer may be located between the transistor 212 and the third electrode 213; when the color filter layer is disposed on the fourth substrate 22, the color filter layer may be located between the fourth electrode 222 and the fourth substrate 221. The color filter layer includes multiple color filter blocks, each color filter block corresponding to one display sub-pixel SP1. The multiple color filter blocks may include red color filter blocks, green color filter blocks, and blue color filter blocks. The display sub-pixel SP1 corresponding to the red color filter block can display red, the display sub-pixel SP1 corresponding to the green color filter block can display green, and the display sub-pixel SP1 corresponding to the blue color filter block can display blue, thereby achieving color display.
[0049] Optionally, referring to Figures 2 and 4, the third substrate 21 further includes a fifth electrode 214 located between the transistor 212 and the third electrode 213. The fifth electrode 214 can provide an electrical signal to the liquid crystal display module 20, or form a horizontal electric field with the third electrode 213 to control the deflection of the second liquid crystal molecules 231. In this case, the fourth electrode 222 is not required. The material of the fifth electrode 214 can be the same as the material of the third electrode 213.
[0050] Referring to Figure 4, the third substrate 21 further includes a light-shielding electrode 215 disposed corresponding to the transistor 212. The transistor 212 may be a thin-film transistor 212, which includes an active layer 2121, a gate 2122, a gate insulating layer 2123, a source 2124, and a drain 2125. The light-shielding electrode 215 is disposed at least corresponding to the active layer 2121. The material of the light-shielding electrode 215 includes metals with light-shielding properties such as molybdenum and titanium.
[0051] Of course, the third substrate 21 also includes a plurality of insulating layers disposed between the light-shielding electrode 215, the transistor 212, the fifth electrode 214, and the third electrode 213. For example, the plurality of insulating layers include a buffer layer 216, a first interlayer insulating layer 217, a passivation layer 218, a planarization layer 219, and a second interlayer insulating layer 220.
[0052] The buffer layer 216 covers the light-shielding electrode 215 and the third substrate 211. The active layer 2121 is disposed on the side of the buffer layer 216 away from the third substrate 211, and the active layer 2121 includes a channel portion and source contact portions and drain contact portions located on opposite sides of the channel portion. The gate insulating layer 2123 and the gate 2122 are disposed on the side of the active layer 2121 away from the third substrate 211 and are disposed corresponding to the channel portion.
[0053] The first interlayer insulating layer 217 covers the gate 2122, a portion of the active layer 2121, and the buffer layer 216. The source 2124 and the drain 2125 are disposed on the side of the first interlayer insulating layer 217 away from the third substrate 211. The source 2124 and the drain 2125 are electrically connected to the source contact and the drain contact, respectively, through vias in the first interlayer insulating layer 217. Optionally, the transistor 212 further includes an auxiliary electrode 2126 connected to the light-shielding electrode 215, and the auxiliary electrode 2126 can be electrically connected to the drain 2125 of the transistor 212.
[0054] The passivation layer 218 covers the source electrode 2124, the drain electrode 2125, and the first interlayer insulating layer 217. The planarization layer 219 covers the passivation layer 218. The fifth electrode 214 is disposed on the side of the passivation layer 218 away from the third substrate 211. The second interlayer insulating layer 220 covers the fifth electrode 214 and the planarization layer 219. The third electrode 213 is disposed on the side of the second interlayer insulating layer 220 away from the third substrate 211, and is electrically connected to the drain electrode 2125 through a via in the second interlayer insulating layer 220.
[0055] In one embodiment, referring to Figures 1 to 5, Figure 5 is a schematic cross-sectional view of the display sub-pixel SP1 and dimming sub-pixel SP2 opposite to each other in Figure 1. Referring to Figure 5, the difference from the embodiment exemplified in Figure 2 is that the third substrate 211 on the liquid crystal display module 20 is reused as the second substrate 321 on the liquid crystal dimming module 30. That is, the liquid crystal display module 20 and the liquid crystal dimming module share a single substrate, thereby reducing the number of substrates and further reducing costs. Other descriptions are as described in the above embodiments and will not be repeated here.
[0056] As can be seen from the above embodiments:
[0057] The display panel and display device provided in this application include a liquid crystal display module and a liquid crystal dimming module. The liquid crystal dimming module is located on the light-emitting side of the liquid crystal display module. The dimming sub-pixels on the liquid crystal dimming module are configured in a one-to-one correspondence with the display sub-pixels on the liquid crystal display module to achieve more refined local dimming and improve the contrast of the liquid crystal display surface. At the same time, the dimming sub-pixels of the liquid crystal dimming module adopt a passive driving method, which can reduce the number of photomasks and manufacturing processes, thereby reducing costs.
[0058] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0059] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A display panel comprising: A liquid crystal display module, the liquid crystal display module comprising a plurality of display sub-pixels arranged in an array, the plurality of display sub-pixels being arranged in a row of sub-pixels in a first direction and in a column of sub-pixels in a second direction, the second direction being different from the first direction; A liquid crystal dimming module is disposed on the light-emitting side of the liquid crystal display module. The liquid crystal dimming module includes a plurality of dimming sub-pixels arranged in an array, and the dimming sub-pixels are configured in a one-to-one correspondence with the display sub-pixels. The driving method of the display sub-pixel is different from that of the dimming sub-pixel. The driving method of the display sub-pixel is set to active driving, while the driving method of the dimming sub-pixel is set to passive driving.
2. The display panel according to claim 1, wherein, The dimming sub-pixel includes a first electrode, and the liquid crystal dimming module includes: The first substrate includes a first substrate and a plurality of first electrodes arranged in an array on the first substrate, wherein each first electrode is disposed corresponding to one of the dimming sub-pixels; The second substrate is disposed opposite to the first substrate, and the second substrate is located on the side of the first electrode away from the first substrate. The second substrate includes a second substrate and a second electrode disposed on the side of the second substrate facing the first electrode. A first liquid crystal layer is disposed between the first electrode and the second electrode, and the first liquid crystal layer includes first liquid crystal molecules; The first substrate further includes a plurality of control signal traces disposed between the first substrate and the first electrode, each of the control signal traces being electrically connected to one of the first electrodes.
3. The display panel according to claim 2, wherein, Each of the first electrodes includes at least one first sub-electrode and at least one second sub-electrode, the first sub-electrode and the second sub-electrode being spaced apart in the first direction; The control signal trace includes a first sub-signal trace and a second sub-signal trace. The first sub-signal trace is electrically connected to the first sub-electrode, and the second sub-signal trace is electrically connected to the second sub-electrode. The first sub-signal trace and the second sub-signal trace are insulated from each other.
4. The display panel according to claim 3, wherein, The first sub-electrode includes multiple dimming domain regions, and the deflection angle of the first liquid crystal molecules corresponding to different dimming domain regions is different. The number of dimming domain regions of the first sub-electrode is greater than the number of dimming domain regions of the second sub-electrode.
5. The display panel according to claim 4, wherein, The first sub-electrode has multiple slits in each of the dimming domain regions, and the slits in two adjacent dimming domain regions extend in different directions.
6. The display panel according to claim 5, wherein, The first sub-electrode may include a main electrode, a border electrode, and a branch electrode. The main electrode extends along the first direction, and the border electrode surrounds the main electrode. The main electrode divides the first sub-electrode into a plurality of dimming domain regions. The branch electrode is located within the dimming domain region and is connected to the main electrode and the border electrode. The gap between adjacent branch electrodes is the slit.
7. The display panel according to claim 6, wherein, The angle between the slit and the first direction is in the range of 0° to 45°.
8. The display panel according to claim 4, wherein, The number of first sub-electrodes is greater than the number of second sub-electrodes, and the second sub-electrodes are located between two adjacent first sub-electrodes; the first sub-signal traces and the second sub-signal traces are spaced apart in the second direction, and within the same dimming sub-pixel, both the first sub-electrodes and the second sub-electrodes are located between the first sub-signal traces and the second sub-signal traces.
9. The display panel according to claim 8, wherein, The number of first sub-electrodes is 2, the number of second sub-electrodes is 1, the two first sub-electrodes are symmetrically arranged about the second sub-electrodes, the first sub-electrodes include two dimming domain regions, and the second sub-electrodes include one dimming domain region; The liquid crystal dimming module further includes a first support post, which is disposed on the side of the second sub-electrode close to the second electrode.
10. The display panel according to any one of claims 2 to 9, wherein, The liquid crystal display module includes: A third substrate is disposed on the side of the second substrate away from the first substrate. The third substrate includes a third substrate and a plurality of transistors and a third electrode disposed on the third substrate. Each display sub-pixel includes at least one transistor and one third electrode, and the third electrode is connected to the transistor. A fourth substrate is disposed on the side of the third substrate away from the second substrate, the fourth substrate including a fourth substrate and a fourth electrode disposed on the fourth substrate facing the third electrode; A second liquid crystal layer is disposed between the third substrate and the fourth substrate; A color filter layer is disposed on the third substrate or the fourth substrate.
11. The display panel according to claim 10, wherein, The third substrate is reused as the second substrate.
12. A display device comprising: Backlight module; A display panel is disposed opposite to the backlight module, and a liquid crystal dimming module is located on the side of the liquid crystal display module away from the backlight module. The display panel includes: A liquid crystal display module, the liquid crystal display module comprising a plurality of display sub-pixels arranged in an array, the plurality of display sub-pixels being arranged in a row of sub-pixels in a first direction and in a column of sub-pixels in a second direction, the second direction being different from the first direction; A liquid crystal dimming module is disposed on the light-emitting side of the liquid crystal display module. The liquid crystal dimming module includes a plurality of dimming sub-pixels arranged in an array, and the dimming sub-pixels are configured in a one-to-one correspondence with the display sub-pixels. The driving method of the display sub-pixel is different from that of the dimming sub-pixel. The driving method of the display sub-pixel is set to active driving, while the driving method of the dimming sub-pixel is set to passive driving.
13. The display device according to claim 12, wherein, The dimming sub-pixel includes a first electrode, and the liquid crystal dimming module includes: The first substrate includes a first substrate and a plurality of first electrodes arranged in an array on the first substrate, wherein each first electrode is disposed corresponding to one of the dimming sub-pixels; The second substrate is disposed opposite to the first substrate, and the second substrate is located on the side of the first electrode away from the first substrate. The second substrate includes a second substrate and a second electrode disposed on the side of the second substrate facing the first electrode. A first liquid crystal layer is disposed between the first electrode and the second electrode, and the first liquid crystal layer includes first liquid crystal molecules; The first substrate further includes a plurality of control signal traces disposed between the first substrate and the first electrode, each of the control signal traces being electrically connected to one of the first electrodes.
14. The display device according to claim 13, wherein, Each of the first electrodes includes at least one first sub-electrode and at least one second sub-electrode, the first sub-electrode and the second sub-electrode being spaced apart in the first direction; The control signal trace includes a first sub-signal trace and a second sub-signal trace. The first sub-signal trace is electrically connected to the first sub-electrode, and the second sub-signal trace is electrically connected to the second sub-electrode. The first sub-signal trace and the second sub-signal trace are insulated from each other.
15. The display device according to claim 14, wherein, The first sub-electrode includes multiple dimming domain regions, and the deflection angle of the first liquid crystal molecules corresponding to different dimming domain regions is different. The number of dimming domain regions of the first sub-electrode is greater than the number of dimming domain regions of the second sub-electrode.
16. The display device according to claim 15, wherein, The first sub-electrode has multiple slits in each of the dimming domain regions, and the slits in two adjacent dimming domain regions extend in different directions.
17. The display device according to claim 16, wherein, The first sub-electrode may include a main electrode, a border electrode, and a branch electrode. The main electrode extends along the first direction, and the border electrode surrounds the main electrode. The main electrode divides the first sub-electrode into a plurality of dimming domain regions. The branch electrode is located within the dimming domain region and is connected to the main electrode and the border electrode. The gap between adjacent branch electrodes is the slit.
18. The display device according to claim 15, wherein, The number of first sub-electrodes is greater than the number of second sub-electrodes, and the second sub-electrodes are located between two adjacent first sub-electrodes; the first sub-signal traces and the second sub-signal traces are spaced apart in the second direction, and within the same dimming sub-pixel, both the first sub-electrodes and the second sub-electrodes are located between the first sub-signal traces and the second sub-signal traces.
19. The display device according to claim 18, wherein, The number of first sub-electrodes is 2, the number of second sub-electrodes is 1, the two first sub-electrodes are symmetrically arranged about the second sub-electrodes, the first sub-electrodes include two dimming domain regions, and the second sub-electrodes include one dimming domain region; The liquid crystal dimming module further includes a first support post, which is disposed on the side of the second sub-electrode close to the second electrode.
20. The display device according to any one of claims 13 to 19, wherein, The liquid crystal display module includes: A third substrate is disposed on the side of the second substrate away from the first substrate. The third substrate includes a third substrate and a plurality of transistors and a third electrode disposed on the third substrate. Each display sub-pixel includes at least one transistor and one third electrode, and the third electrode is connected to the transistor. A fourth substrate is disposed on the side of the third substrate away from the second substrate, the fourth substrate including a fourth substrate and a fourth electrode disposed on the fourth substrate facing the third electrode; A second liquid crystal layer is disposed between the third substrate and the fourth substrate; A color filter layer is disposed on the third substrate or the fourth substrate.