CN108766975B - Display panel and electronic equipment - Google Patents
Display panel and electronic equipment Download PDFInfo
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- CN108766975B CN108766975B CN201810401160.5A CN201810401160A CN108766975B CN 108766975 B CN108766975 B CN 108766975B CN 201810401160 A CN201810401160 A CN 201810401160A CN 108766975 B CN108766975 B CN 108766975B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive sensing
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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Abstract
The embodiment of the invention discloses a display panel and an electronic device, wherein the display panel comprises: the display area comprises a fingerprint identification area and a non-fingerprint identification area; the peripheral driving circuit is used for providing a first power supply voltage signal for the display area in the normal display mode, and is also used for providing a second power supply voltage signal for the non-fingerprint identification area so as to adjust the non-fingerprint identification area to be second set brightness, wherein the first set brightness is greater than the second set brightness. According to the embodiment of the invention, independent brightness control of the fingerprint identification area and the non-fingerprint identification area in a fingerprint identification mode is realized; the fingerprint identification effect is improved; the screen flashing phenomenon of the display panel under the switching of the display mode is solved.
Description
Technical Field
The present invention relates to display technologies, and in particular, to a display panel and an electronic device.
Background
The full screen is a relatively broad concept defined by electronic terminal equipment manufacturers for the ultra-high screen occupation ratio equipment, namely, the front of the electronic terminal equipment is completely a screen, and a frameless design is adopted to pursue the screen occupation ratio close to 100%. In fact, limited by current technology, full screen devices are only ultra high screen fraction devices for the time being, and screen fraction 100% cannot be achieved.
In order to further realize the ultrahigh screen occupation ratio, the fingerprint area of the full-screen device is arranged in the display area, namely the display area comprises the fingerprint area and the non-fingerprint area. The electronic equipment adopts a normal dimming mode for displaying when displaying normally, namely, the brightness is modulated by adjusting the duty ratio, and the display area is switched to a fingerprint identification mode when identifying fingerprints, so that a screen is suddenly lightened. Therefore, when the conventional display panel enters the fingerprint identification mode from the normal display mode, the screen flashing phenomenon occurs.
Disclosure of Invention
The embodiment of the invention provides a display panel and electronic equipment, and aims to solve the problem that a screen flashing phenomenon occurs when an existing display panel enters a fingerprint identification mode from a normal display mode.
In a first aspect, an embodiment of the present invention provides a display panel, including:
the display area comprises a fingerprint identification area and a non-fingerprint identification area;
the peripheral driving circuit is used for providing a first power supply voltage signal for the display area in the normal display mode, and is also used for providing a second power supply voltage signal for the non-fingerprint identification area so as to adjust the non-fingerprint identification area to be second set brightness, wherein the first set brightness is greater than the second set brightness.
In a second aspect, the embodiment of the invention also provides an electronic device, which includes the display panel as above.
In the embodiment of the invention, the display area comprises a fingerprint identification area and a non-fingerprint identification area, the peripheral driving circuit provides a first power supply voltage signal for the display area in a normal display mode, the peripheral driving circuit also provides a first power supply voltage signal for the fingerprint identification area in the fingerprint identification mode so as to adjust the fingerprint identification area to a first set brightness, and also provides a second power supply voltage signal for the non-fingerprint identification area in the fingerprint identification mode so as to adjust the non-fingerprint identification area to a second set brightness, and the first set brightness is greater than the second set brightness. Therefore, independent brightness control of the fingerprint identification area and the non-fingerprint identification area in the fingerprint identification mode can be realized; the brightness of the fingerprint identification area is higher in the fingerprint identification mode, so that the accuracy and effect of the fingerprint identification area in fingerprint identification can be improved; the brightness control of the non-fingerprint identification area under different modes can be realized, the brightness consistency of the non-fingerprint identification area under different modes is further realized, and the screen flashing phenomenon of the display panel under the switching of the display modes is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view taken along A-A' of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B' of FIG. 2;
FIG. 5 is a schematic diagram of a display panel according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view taken along line C-C' of FIG. 5;
FIG. 7 is a diagram of a display panel according to an embodiment of the present invention;
fig. 8 is a cross-sectional view of a display panel according to an embodiment of the present invention;
fig. 9 is a schematic diagram of a pixel circuit according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described through embodiments with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic view of a display panel according to an embodiment of the present invention. The display panel provided by the embodiment comprises: a display area 10, the display area 10 including a fingerprint identification area 11 and a non-fingerprint identification area 12; the peripheral driving circuit 20 is configured to provide the display region 10 with a first power voltage signal PVDD1 in the normal display mode, and the peripheral driving circuit 20 is further configured to provide the fingerprint identification region 11 with a first power voltage signal PVDD1 to adjust the fingerprint identification region 11 to a first set brightness and provide the non-fingerprint identification region 12 with a second power voltage signal PVDD2 to adjust the non-fingerprint identification region 12 to a second set brightness, wherein the first set brightness is greater than the second set brightness.
In this embodiment, the display panel may be selected as a full-screen display panel, and in order to achieve a higher screen occupation ratio, the fingerprint identification area 11 of the display panel is disposed in the display area 10, that is, the display area 10 of the display panel includes the fingerprint identification area 11 and the non-fingerprint identification area 12. In the display stage, i.e., the normal display mode, the entire display area 10 is normally displayed, and in the fingerprint recognition stage, i.e., the fingerprint recognition mode, the fingerprint recognition area 11 of the display area 10 performs fingerprint recognition and the non-fingerprint recognition area 12 of the display area 10 performs normal display.
The display panel may be an organic light emitting display panel, and the organic light emitting display panel includes a plurality of sub-pixels located in the display area, and each sub-pixel may include an organic light emitting device and a pixel circuit for controlling the organic light emitting device to emit light. The organic light-emitting device comprises a first electrode, an organic light-emitting layer and a second electrode, wherein the first electrode is an anode/cathode, and the second electrode is a cathode/anode.
In this embodiment, the non-display area of the display panel is further provided with a peripheral driving circuit 20, and the peripheral driving circuit 20 is configured to provide a power voltage signal to the display area 10 to enable the display area 10 to perform display. The display mode of a frame of picture includes a normal display mode and a fingerprint identification mode, and it should be noted that the brightness of the frame of picture is usually adjusted by adopting a dimming mode, the dimming mode specifically controls the time length occupied by the screen brightening in the length of the frame of picture, and the ratio of the time length of the screen brightening to the time length of the frame of picture in the frame of picture is a duty ratio, obviously, the larger the duty ratio is, the higher the brightness of the picture is, and the smaller the duty ratio is, the lower the brightness of the picture is. The fingerprint identification process has certain requirements on the duty ratio of the screen-on time, and the normal display mode and the fingerprint identification mode are different in that the duty ratio of the normal display mode is different from that of the fingerprint identification mode, and the duty ratio of the optional normal display mode in the embodiment is smaller than that of the fingerprint identification mode.
As can be seen from this, when the peripheral driver circuit 20 supplies the first power supply voltage signal PVDD1 to the display region 10 in the normal display mode, the display region 10 as a whole displays normally, that is, the brightness of the fingerprint identification region 11 is identical to the brightness of the non-fingerprint identification region 12. The peripheral driving circuit 20 further provides the first power supply voltage signal PVDD1 to the fingerprint identification area 11 to adjust the fingerprint identification area 11 to a first set brightness and provides the second power supply voltage signal PVDD2 to the non-fingerprint identification area 12 to adjust the non-fingerprint identification area 12 to a second set brightness in the fingerprint identification mode, that is, the brightness of the fingerprint identification area 11 is different from the brightness of the non-fingerprint identification area 12, thereby realizing independent brightness control of different areas of the display area 10.
In this embodiment, the peripheral driving circuit 20 is configured to provide the first power voltage signal PVDD1 to the display area 10 in the normal display mode, and the peripheral driving circuit 20 is further configured to provide the first power voltage signal PVDD1 to the fingerprint identification area 11 in the fingerprint identification mode to adjust the fingerprint identification area 11 to the first set brightness. When the peripheral driving circuit 20 outputs the same first power voltage signal PVDD1, for the fingerprint identification area 11 in the display area 10, based on that the duty ratio of the normal display mode is smaller than the duty ratio of the fingerprint identification mode, the brightness of the fingerprint identification area 11 in the normal display mode is smaller than the first set brightness of the fingerprint identification area in the fingerprint identification mode, that is, the brightness of the fingerprint identification area 11 in the fingerprint identification mode is improved, and the fingerprint identification precision is related to the brightness of the fingerprint identification area 11, and the higher the brightness of the fingerprint identification area 11 is, the higher the fingerprint identification precision is, thereby improving the accuracy and effect of fingerprint identification.
In this embodiment, the peripheral driving circuit 20 is configured to provide the first power supply voltage signal PVDD1 to the display region 10 in the normal display mode, and the peripheral driving circuit 20 is further configured to provide the second power supply voltage signal PVDD2 to the non-fingerprint identification region 12 in the fingerprint identification mode to adjust the non-fingerprint identification region 12 to the second set brightness. Based on the fact that the duty ratio of the normal display mode is different from the duty ratio of the fingerprint identification mode, the peripheral driving circuit 20 can provide different power supply voltage signals for the non-fingerprint identification area 12 in the normal display mode and the fingerprint identification mode, so that the brightness control of the non-fingerprint identification area 12 in different modes can be achieved, specifically, the peripheral driving circuit 20 can achieve the brightness consistency of the non-fingerprint identification area 12 in different modes by controlling the first power supply voltage signal PVDD1 and the second power supply voltage signal PVDD2, and the problem of the screen flashing phenomenon of the display panel in the display mode switching is solved, for example, the screen flashing phenomenon of the display panel entering the fingerprint identification mode from the normal display mode and the screen flashing phenomenon of the display panel entering the normal display mode from the fingerprint identification mode are solved.
In this embodiment, the peripheral driving circuit 20 is further configured to provide the first power supply voltage signal PVDD1 to the fingerprint identification area 11 to adjust the fingerprint identification area 11 to the first set brightness and provide the second power supply voltage signal PVDD2 to the non-fingerprint identification area 12 to adjust the non-fingerprint identification area 12 to the second set brightness in the fingerprint identification mode. In the fingerprint identification mode, a frame of picture corresponds to a set duty ratio, and at this time, the peripheral driving circuit 20 applies different power supply voltage signals to the fingerprint identification area 11 and the non-fingerprint identification area 12, so that the brightness of the fingerprint identification area 11 and the brightness of the non-fingerprint identification area 12 are different, and the brightness of the fingerprint identification area 11 and the brightness of the non-fingerprint identification area 12 are independently controlled. When the first set brightness is greater than the second set brightness, the brightness of the fingerprint identification area 11 is greater than the brightness of the non-fingerprint identification area 12 in the fingerprint identification mode, and the fingerprint identification precision is known to be related to the brightness of the fingerprint identification area, so that the accuracy and effect of the fingerprint identification area 11 can be improved.
In this embodiment, the display area includes a fingerprint identification area and a non-fingerprint identification area, the peripheral driving circuit provides the first power voltage signal to the display area in the normal display mode, the peripheral driving circuit also provides the first power voltage signal to the fingerprint identification area in the fingerprint identification mode to adjust the fingerprint identification area to a first set brightness, and also provides the second power voltage signal to the non-fingerprint identification area in the fingerprint identification mode to adjust the non-fingerprint identification area to a second set brightness, the first set brightness is greater than the second set brightness. Therefore, independent brightness control of the fingerprint identification area and the non-fingerprint identification area in the fingerprint identification mode can be realized; the brightness of the fingerprint identification area is higher in the fingerprint identification mode, so that the accuracy and effect of the fingerprint identification area in fingerprint identification can be improved; the brightness control of the non-fingerprint identification area under different modes can be realized, the brightness consistency of the non-fingerprint identification area under different modes is further realized, and the screen flashing phenomenon of the display panel under the switching of the display modes is solved.
Optionally, the second set brightness of the non-fingerprint identification area 12 in the fingerprint identification mode is equal to the light-emitting brightness of the display area 10 in the normal display mode. Based on the duty ratio of the normal display mode being different from the duty ratio of the fingerprint identification mode, the peripheral driving circuit 20 may control the brightness of the non-fingerprint identification area 12 in different modes by providing different power voltage signals to the non-fingerprint identification area 12 in the normal display mode and the fingerprint identification mode. Specifically, the peripheral driving circuit 20 controls the first power supply voltage signal PVDD1 and the second power supply voltage signal PVDD2 to make the second set luminance of the non-fingerprint identification region 12 in the fingerprint identification mode equal to the luminance of the display region 10 in the normal display mode, so that the luminance of the non-fingerprint identification region 12 in different modes can be consistent, and the problem of screen flashing of the display panel during switching of the display modes is solved. It should be noted that, a person skilled in the art adjusts the first power voltage signal and the second power voltage signal output by the peripheral driving circuit according to the duty ratio of the normal display mode and the duty ratio of the fingerprint identification mode, so that the brightness of the non-fingerprint identification area in different modes can be consistent, the problem of the screen flashing phenomenon of the display panel in different modes is solved, and a specific numerical example is not performed here.
Optionally, the peripheral driving circuit 20 is further configured to provide a first light-emitting control signal to the display area 10 in the normal display mode and a second light-emitting control signal to the display area 10 in the fingerprint identification mode, an effective pulse duty ratio of the first light-emitting control signal is smaller than an effective pulse duty ratio of the second light-emitting control signal, and a voltage value of the first power supply voltage signal PVDD1 is larger than a voltage value of the second power supply voltage signal PVDD 2. The light emission control signal includes an active pulse signal and an inactive pulse signal, the active pulse of the light emission control signal substantially refers to a pulse signal controlling a transmission path through which the on power supply voltage signal can be transmitted to the light emitting device of the display panel, and the light emitting device of the display panel emits light under the active pulse control of the light emission control signal, whereas the inactive pulse of the light emission control signal substantially refers to a pulse signal controlling a transmission path through which the off power supply voltage signal can be transmitted to the light emitting device of the display panel, and the light emitting device of the display panel does not emit light under the inactive pulse control of the light emission control signal. The proportion of the effective pulse signal time length in the one-frame picture time length is the effective pulse duty ratio, and when the power supply voltage signal is fixed, the larger the effective pulse duty ratio is, the higher the picture brightness is.
In the present embodiment, the peripheral driving circuit 20 supplies the first light emission control signal to the display area 10 in the normal display mode and supplies the second light emission control signal to the display area 10 in the fingerprint recognition mode. Given that the effective pulse duty ratio of the first light-emitting control signal is smaller than that of the second light-emitting control signal, the voltage value of the first power supply voltage signal PVDD1 is greater than that of the second power supply voltage signal PVDD2 in order to make the second set luminance of the non-fingerprint identification area 12 in the fingerprint identification mode equal to the light-emitting luminance of the display area 10 in the normal display mode.
For example, it is assumed that the duty ratio in the fingerprint recognition mode is greater than that in the normal display mode, and the 4.6V power supply voltage signal in the normal display mode makes the display region 10 reach the same brightness as the 3.5V power supply voltage signal in the fingerprint recognition mode makes the non-fingerprint recognition region 12 reach. The peripheral driving circuit 20 supplies a power voltage signal of 4.6V to the display area 10 in the normal display mode; when entering the fingerprint identification mode, the peripheral driving circuit 20 provides a 3.5V power supply voltage signal for the non-fingerprint identification area 12 in the fingerprint identification mode, so that the non-fingerprint identification area 12 is ensured not to be suddenly lightened, and the problem of screen flashing is avoided; the peripheral driving circuit 20 supplies a power voltage signal of 4.6V to the fingerprint identification area 11 in the fingerprint identification mode to increase the brightness of the fingerprint identification area 11, thereby increasing the fingerprint identification effect.
Fig. 2 is a schematic view of a display panel according to an embodiment of the present invention. The display panel of the present embodiment further includes: a first power supply voltage input path PVDDA and a second power supply voltage input path PVDDB; the peripheral driver circuit 20 provides the first power supply voltage signal PVDD1 to the fingerprint identification region 11 through the first power supply voltage input path PVDDA, and the peripheral driver circuit 20 provides the first power supply voltage signal PVDD1 and the second power supply voltage signal PVDD2 to the non-fingerprint identification region 12 through the second power supply voltage input path PVDDB. In the display region 10 of the display panel, the fingerprint identification region 11 corresponds to an independent first power voltage input path PVDDA, and the non-fingerprint identification region 12 corresponds to an independent second power voltage input path PVDDB, so that the peripheral driving circuit 20 can independently control the power voltage signals applied to the fingerprint identification region 11 and the non-fingerprint identification region 12, thereby realizing independent control of the power voltage signals of different regions of the display region 10 in the same mode and independent control of the power voltage signals of the same region of the display region 10 in different modes.
In a display stage, i.e., a normal display mode, the peripheral driving circuit 20 supplies the first power supply voltage signal PVDD1 to the fingerprint identification region 11 through the first power supply voltage input path PVDDA and supplies the first power supply voltage signal PVDD1 to the non-fingerprint identification region 12 through the second power supply voltage input path PVDDB, so that the brightness of the whole display region 10 is uniform, and normal display is realized. In the fingerprint recognition stage, i.e. in the fingerprint recognition mode, the peripheral driving circuit 20 provides the first power voltage signal PVDD1 to the fingerprint recognition area 11 through the first power voltage input path PVDDA, and provides the second power voltage signal PVDD2 to the non-fingerprint recognition area 12 through the second power voltage input path PVDDB, so as to independently control the brightness of the fingerprint recognition area 11 and the non-fingerprint recognition area 12, specifically, optionally control the brightness of the fingerprint recognition area 11 to be greater than that of the non-fingerprint recognition area 12 to improve the fingerprint recognition effect and accuracy, and optionally control the brightness of the non-fingerprint recognition area 12 to be equal to that of the display area 10 in the normal display mode to avoid the occurrence of the splash screen phenomenon.
Fig. 3 is a sectional view taken along a-a 'of fig. 2, and fig. 4 is a sectional view taken along B-B' of fig. 2. As shown in fig. 3 and 4, the film layer where the optional first power voltage input path PVDDA is located and the film layer where the second power voltage input path PVDDB is located are stacked, and the first power voltage input path PVDDA and the second power voltage input path PVDDB are insulated from each other. Here, the film layer where the first power voltage input path PVDDA is located and the film layer where the second power voltage input path PVDDB is located are stacked and insulated, so that mutual independence between the first power voltage input path PVDDA and the second power voltage input path PVDDB is achieved, and the peripheral driver circuit 20 can independently control the power voltage signal of each power voltage input path, so as to independently provide the power voltage signal to the corresponding region.
As shown in fig. 2 to 4, optionally, in the direction perpendicular to the display panel, the projection of the first power voltage input path PVDDA on the display panel is located in the fingerprint identification region 11, the projection of the second power voltage input path PVDDB on the display panel is located in the non-fingerprint identification region 12, and each path port of the second power voltage input path PVDDB is electrically connected to the first connection unit P1 through the via 13, and the first connection unit P1 is disposed in a layer-insulated manner from the first power voltage input path PVDDA. In the direction perpendicular to the display panel, the projection of the first power supply voltage input path PVDDA on the display panel is located in the fingerprint identification area 11 so that the peripheral driving circuit 20 provides different or same power supply voltage signals to the fingerprint identification area 11 through the first power supply voltage input path PVDDA in different modes; the projection of the second power supply voltage input path PVDDB on the display panel is located in the non-fingerprint identification area 12, so that the peripheral driving circuit 20 provides different or same power supply voltage signals to the non-fingerprint identification area 12 through the second power supply voltage input path PVDDB in different modes.
It should be noted that the selectable power supply voltage input path includes a plurality of transmission paths in the display region 10, one transmission path is disposed corresponding to one column of the sub-pixels 14, and specifically, one transmission path is electrically connected to the pixel circuits in the corresponding column of the sub-pixels 14. Specifically, each transmission path in the first power supply voltage input path PVDDA is electrically connected to the pixel circuit of each sub-pixel 14 of the corresponding column of sub-pixels 14 located in the fingerprint identification area 11, and each transmission path in the second power supply voltage input path PVDDB is electrically connected to the pixel circuit of each sub-pixel 14 of the corresponding column of sub-pixels 14 located in the non-fingerprint identification area 12. The first power voltage input path PVDDA is electrically connected to the peripheral driving circuit 20 in a non-display region at the periphery of the display region 10, and the second power voltage input path PVDDB is electrically connected to the peripheral driving circuit 20 in a non-display region at the periphery of the display region 10.
For the second power voltage input path PVDDB, the transmission paths above the fingerprint identification region 11 do not extend to the periphery of the display region 10, that is, the transmission paths have path ports (open ports) in the display region 10, in order to write the power voltage signal of the peripheral driving circuit 20 into each transmission path of the second power voltage input path PVDDB, each path port of the second power voltage input path PVDDB may be electrically connected to the first connection unit P1 through the via 13, so as to implement transmission continuity of the second power voltage input path PVDDB. The optional first connection unit P1 is disposed in a same layer insulated from the first power voltage input path PVDDA without adding additional film layers.
Fig. 5 is a schematic view of a display panel according to an embodiment of the invention. The display panel of the present embodiment further includes: a first power supply voltage input path PVDDA and a second power supply voltage input path PVDDB; the peripheral driver circuit 20 provides the first power supply voltage signal PVDD1 to the fingerprint identification region 11 through the first power supply voltage input path PVDDA, and the peripheral driver circuit 20 provides the first power supply voltage signal PVDD1 and the second power supply voltage signal PVDD2 to the non-fingerprint identification region 12 through the second power supply voltage input path PVDDB. The film layer where the first power supply voltage input path PVDDA is located and the film layer where the second power supply voltage input path PVDDB is located are stacked, and the first power supply voltage input path PVDDA and the second power supply voltage input path PVDDB are arranged in an insulated mode.
Fig. 6 is a cross-sectional view taken along line C-C' of fig. 5. The difference from fig. 2 to 4 is that the second power supply voltage input path PVDDB has an overlapping portion with the fingerprint identification area 11, optionally in a direction perpendicular to the display panel. As shown in fig. 5, each transmission path in the first power voltage input path PVDDA extends to the periphery of the display region 10 and is electrically connected to the peripheral driving circuit 20, and each transmission path in the first power voltage input path PVDDA can receive a power voltage signal transmitted by the peripheral driving circuit 20. Each transmission path in the second power voltage input path PVDDB extends to the periphery of the display region 10 and is electrically connected to the peripheral driving circuit 20, and each transmission path in the second power voltage input path PVDDB can receive a power voltage signal transmitted by the peripheral driving circuit 20.
Each transmission path in the optional second power supply voltage input path PVDDB located in the fingerprint identification area 11 is not electrically connected to the pixel circuit of the sub-pixel 14 in the fingerprint identification area 11, so that the power supply voltage signal of the second power supply voltage input path PVDDB is transmitted only to each pixel circuit in the non-fingerprint identification area 12, and does not affect the pixel circuit of the fingerprint identification area 11. Therefore, the first power voltage input path PVDDA and the second power voltage input path PVDDB are completely independent in structure and signal transmission, and the second power voltage input path PVDDB has an overlapping portion with the fingerprint identification region 11 in a direction perpendicular to the display panel, which does not affect fingerprint identification of the fingerprint identification region 11 in the fingerprint identification mode.
Fig. 7 is a schematic view of a display panel according to an embodiment of the invention. The display panel shown in fig. 7 further includes: a first power supply voltage input path PVDDA and a second power supply voltage input path PVDDB; the peripheral driver circuit 20 provides the first power supply voltage signal PVDD1 to the fingerprint identification region 11 through the first power supply voltage input path PVDDA, and the peripheral driver circuit 20 provides the first power supply voltage signal PVDD1 and the second power supply voltage signal PVDD2 to the non-fingerprint identification region 12 through the second power supply voltage input path PVDDB. The optional second power supply voltage input path PVDDB includes a first power supply path layer PV1 and a second power supply path layer PV2 stacked in an insulating arrangement, input terminals of the first power supply path layer PV1 and the second power supply path layer PV2 being electrically connected by a via 15, the first power supply voltage input path PVDDA being arranged in a layer insulating arrangement with the second power supply path layer PV 2.
The area of the fingerprint identification area 11 is very small, so the voltage drop influence of the transmission path in the first power supply voltage input path PVDDA is also very small, and the first power supply voltage input path PVDDA is set in a single-layer routing transmission mode. The area of non-fingerprint identification region 12 is great, and the line resistance of walking of every transmission path is great in second power supply voltage input path PVDDB leads to the pressure drop phenomenon serious easily, and then arouses to show the inequality, and based on this, second power supply voltage input path PVDD2 adopts double-deck line transmission's mode to set up, walks the line resistance through reducing transmission path and reaches the effect that reduces the pressure drop, and then improves and show the inequality phenomenon. The second power path layer PV2 of the optional second power voltage input path PVDDB is insulated from the film layer where the first power voltage input path PVDDA is located, and no additional routing film layer is required.
Optionally, in a direction perpendicular to the display panel, a projection of the second power supply voltage input path PVDDB on the display panel is located at the non-fingerprint identification region 12, a projection of the first power supply voltage input path PVDDA on the display panel is located at the fingerprint identification region 11, and each path port of the second power supply path layer PV2 is electrically connected to the first power supply path layer PV1 through a via 15. Each path port of the second power path layer PV2 is electrically connected to the first power path layer PV1 through a via 15, enabling transmission continuity of the second power voltage input path PVDDB, so that the peripheral driving circuit 20 can transmit a power voltage signal to each transmission path in each power path layer of the second power voltage input path PVDDB.
As for any of the display panels shown in fig. 2 to 7, the selectable display panel further includes: the DATA line DATA (refer to fig. 8), the first power voltage input path PVDDA and the DATA line are disposed on the same layer, that is, the material of the first power voltage input path PVDDA is the same as that of the DATA line, and the first power voltage input path PVDDA and the DATA line are located on the same film layer, wherein the DATA line is used for transmitting DATA signals for the pixels in the display panel. Specifically, after the data line film layer of the display panel is formed through deposition, the data line of the display panel and the first power voltage input path PVDDA are formed simultaneously through an etching process, so that the cost can be reduced, the manufacturing procedures can be reduced, and the thickness of the display panel can be reduced. In addition, the extending direction of each path branch in the first power voltage input path PVDDA may be the same as the extending direction of the data line, so that the first power voltage input path and the data line are disposed on the same layer, which may prevent the path branches in the first power voltage input path from crossing the data line, and avoid the influence on the arrangement of the data line. Alternatively, each path branch in the first power voltage input path PVDDA may be alternately arranged with the data line, and for any of the display panels shown in fig. 2 to 7, the first power voltage input path PVDDA and the second power voltage input path PVDDB may be made of the same material, or have the same film thickness, and SiNx/SiOx may be used to achieve insulation between the first power voltage input path PVDDA and the second power voltage input path PVDDB. Those skilled in the art will understand that the upper and lower layer relationship of the metal layer where the first power voltage input path is located and the metal layer where the second power voltage input path is located is not particularly limited, for example, in one embodiment, the film layer where the first power voltage input path is located in the light emitting direction may be located on the metal layer where the second power voltage input path is located, for example, in another embodiment, the film layer where the first power voltage input path is located in the light emitting direction may be located under the metal layer where the second power voltage input path is located, for example, in other embodiments, the second power voltage input path may be disposed on the same layer as the data line. Referring to fig. 8, fig. 8 is a cross-sectional view of a display panel according to an embodiment of the present invention, where the display panel includes a substrate 101, a thin film transistor array layer 102 is disposed on the substrate 101, a metal layer S/D where a source and a drain of a thin film transistor TFT in the thin film transistor array layer 102 are located is generally the same layer as a DATA line DATA, and a corresponding selectable first power voltage input path PVDDA is disposed in the same layer as the metal layer S/D where the source and the drain are located. The thin film transistor array layer 102 is further provided with a display device layer 103, the display device layer 103 includes a first electrode 103a, an organic light emitting layer 103b and a second electrode 103c, and a metal layer is optionally added between the metal layer S/D where the source and drain of the thin film transistor TFT are located and the first electrode 103a of the display device layer 103, and the metal layer is optionally a metal layer where the second power supply voltage input path PVDDB is located. An insulating layer is arranged between the metal layer S/D where the source and drain of the thin film transistor array layer 102 are located and the metal layer where the second power voltage input path PVDDB is located, and an insulating layer is arranged between the metal layer where the second power voltage input path PVDDB is located and the first electrode 103a of the display device layer 103. An encapsulation layer 104 is further disposed on the display device layer 103, and the display panel is optionally encapsulated by the encapsulation layer 104 by using a thin film encapsulation technology. It should be noted that fig. 8 is used to illustrate the sequence of the film layers in which the elements are located, and the specific arrangement of the elements in the film layers is not limited.
Optionally, the first power voltage input path and the second power voltage input path may be both made of a metal material, and the metal material has good conductivity, and is favorable for fast signal transmission and uniformity of potential distribution.
To further clarify the destination of the first power supply voltage signal, the second power supply voltage signal, the first light emission control signal, and the second light emission control signal, reference may be made to fig. 9. Fig. 9 is a schematic diagram of a pixel circuit according to an embodiment of the present invention, and as shown in fig. 9, the pixel circuit is used for controlling the light emission of the organic light emitting device OLED, and the pixel circuit may include a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, and a capacitor C, and further has a first power signal terminal EP1, scan signal terminals scan [ n-1] and scan [ n ], a data signal terminal Vdata, a light emission control signal terminal emit [ n ], and an initialization signal terminal Vinit, where n represents a present-stage signal, and n-1 represents a previous-stage signal. Also illustrated in fig. 9 are an organic light emitting device OLED electrically connected to the pixel circuit, and a second power signal terminal EP2 electrically connected to the organic light emitting device OLED. The first power voltage signal may be transmitted to the pixel circuit through the first power signal terminal EP1, and the first light emission control signal or the second light emission control signal may be transmitted to the pixel circuit through the light emission control signal terminal emit [ n ]. In addition, the data line mentioned in the above embodiments may be electrically connected to the data signal terminal Vdata. Fig. 9 is an example of a pixel circuit that can be used in the present application, and the present application does not limit the pixel circuit that can be used in a sub-pixel.
An embodiment of the present invention further provides an electronic device, which includes the display panel according to any of the above embodiments. The optional display panel is an organic light emitting display panel. The optional electronic device is a full-screen electronic device, and the optional electronic device is a flexible or rigid electronic device. For example, the electronic device is an electronic device such as a smart phone or a tablet computer.
Based on the display panel described in any of the embodiments, in the electronic device provided by the embodiments of the present invention, the display area includes the fingerprint identification area and the non-fingerprint identification area, the fingerprint identification area and the non-fingerprint identification area share one peripheral driving circuit, and the display effect during fingerprint identification is optimized by adjusting the setting of the power supply voltage input path in the display panel, thereby avoiding the screen flashing phenomenon occurring when the screen enters the fingerprint identification mode from the display mode, solving the brightness jump phenomenon in different display modes, and achieving the effect of independently controlling the brightness in different areas of the display area.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (12)
1. A display panel, comprising:
a display area including a fingerprint identification area and a non-fingerprint identification area;
the peripheral driving circuit is used for providing a first power supply voltage signal for the fingerprint identification area in the normal display mode so as to adjust the fingerprint identification area to a first set brightness and providing a second power supply voltage signal for the non-fingerprint identification area so as to adjust the non-fingerprint identification area to a second set brightness, and the first set brightness is greater than the second set brightness.
2. The display panel according to claim 1, wherein the second set luminance of the non-fingerprint identification region in the fingerprint identification mode is equal to the light emission luminance of the display region in the normal display mode.
3. The display panel according to claim 2, wherein the peripheral driving circuit is further configured to provide a first light emission control signal to the display area in the normal display mode and a second light emission control signal to the display area in the fingerprint recognition mode, an effective pulse duty ratio of the first light emission control signal is smaller than an effective pulse duty ratio of the second light emission control signal, and a voltage value of the first power supply voltage signal is larger than a voltage value of the second power supply voltage signal.
4. The display panel according to claim 1, further comprising: a first supply voltage input path and a second supply voltage input path;
the peripheral driving circuit provides the first power voltage signal to the fingerprint identification area through the first power voltage input path, and the peripheral driving circuit provides the first power voltage signal and the second power voltage signal to the non-fingerprint identification area through the second power voltage input path.
5. The display panel according to claim 4, wherein the first power supply voltage input path and the second power supply voltage input path are stacked, and the first power supply voltage input path and the second power supply voltage input path are insulated from each other.
6. The display panel according to claim 5, wherein a projection of the first power supply voltage input path on the display panel is located in the fingerprint identification region, a projection of the second power supply voltage input path on the display panel is located in the non-fingerprint identification region, and each path port of the second power supply voltage input path is electrically connected to a first connection unit through a via hole, the first connection unit being provided in a layer insulated from the first power supply voltage input path, in a direction perpendicular to the display panel.
7. The display panel according to claim 5, wherein the second power supply voltage input path has an overlapping portion with the fingerprint identification area in a direction perpendicular to the display panel.
8. The display panel according to claim 4, wherein the second power supply voltage input path includes a first power supply path layer and a second power supply path layer which are stacked and insulated, wherein input ends of the first power supply path layer and the second power supply path layer are electrically connected through a via hole, and wherein the first power supply voltage input path and the second power supply path layer are insulated on the same layer.
9. The display panel according to claim 8, wherein a projection of the second power supply voltage input path on the display panel is located in the non-fingerprint identification region, a projection of the first power supply voltage input path on the display panel is located in the fingerprint identification region, and each path port of the second power supply path layer is electrically connected to the first power supply path layer through a via hole in a direction perpendicular to the display panel.
10. The display panel according to claim 5 or 8, characterized by further comprising: and the first power supply voltage input path and the data line are arranged on the same layer.
11. The display panel according to claim 1, wherein the display panel is an organic light-emitting display panel including an organic light-emitting device including a first electrode, an organic light-emitting layer, and a second electrode.
12. An electronic device characterized by comprising the display panel according to any one of claims 1 to 11.
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| CN110767107B (en) | 2018-12-28 | 2023-03-24 | 昆山国显光电有限公司 | Display device, display panel thereof and OLED array substrate |
| CN109712593B (en) * | 2019-02-25 | 2021-10-12 | 京东方科技集团股份有限公司 | Brightness control method and terminal equipment |
| CN110276326B (en) * | 2019-06-27 | 2021-07-16 | 云谷（固安）科技有限公司 | Display device and display method |
| CN110501833B (en) * | 2019-08-27 | 2022-09-02 | 厦门天马微电子有限公司 | Display device |
| CN110556083B (en) * | 2019-09-24 | 2021-08-31 | 晟合微电子(肇庆)有限公司 | Display screen brightness control method, control system and operating system |
| CN113257189A (en) * | 2020-02-10 | 2021-08-13 | 敦泰电子股份有限公司 | Unlocking method of optical under-screen fingerprint mobile device |
| CN111414872B (en) * | 2020-03-25 | 2023-07-14 | Oppo广东移动通信有限公司 | Display device and electronic apparatus |
| CN113808549A (en) * | 2020-06-11 | 2021-12-17 | 北京小米移动软件有限公司 | Brightness adjusting method and device for LCD display screen, electronic equipment and medium |
| CN111986602B (en) * | 2020-07-24 | 2023-04-07 | 昆山国显光电有限公司 | Burning method of display panel and display device |
| CN112259602B (en) * | 2020-10-10 | 2022-10-04 | 武汉华星光电半导体显示技术有限公司 | Small-size TFT and display panel |
| CN114639342A (en) * | 2022-04-25 | 2022-06-17 | 北京欧铼德微电子技术有限公司 | Display panel brightness control method and device, display equipment and electronic equipment |
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| CN107065274B (en) * | 2017-06-19 | 2020-03-10 | 上海天马微电子有限公司 | Array substrate, display panel and display device |
| CN107316887B (en) * | 2017-07-28 | 2019-12-17 | 维沃移动通信有限公司 | Mobile terminal |
| CN107749419B (en) * | 2017-10-31 | 2021-06-18 | 武汉天马微电子有限公司 | Electroluminescent display panel and display device |
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Effective date of registration: 20211103 Address after: No.8, liufangyuan Henglu, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: WUHAN TIANMA MICROELECTRONICS Co.,Ltd. Patentee after: Wuhan Tianma Microelectronics Co.,Ltd. Shanghai Branch Address before: Room 509, building 1, No. 6111, Longdong Avenue, Pudong New Area, Shanghai, 200120 Patentee before: SHANGHAI TIANMA AM-OLED Co.,Ltd. |