CN115035872B - Display device - Google Patents
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- CN115035872B CN115035872B CN202210756844.3A CN202210756844A CN115035872B CN 115035872 B CN115035872 B CN 115035872B CN 202210756844 A CN202210756844 A CN 202210756844A CN 115035872 B CN115035872 B CN 115035872B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The embodiment of the application provides a display device, in which a backlight module comprises an opening area, and a display panel is arranged on one side of a light emitting surface of the backlight module and covers the opening area; the bimodal film is positioned on one side of the display panel facing the backlight module and covers the opening area; the light supplementing lamp is positioned on one side of the bimodal film far away from the display panel, and the opening area covers the light supplementing lamp; the first driving circuit is electrically connected with the bimodal film and receives a first signal and a second signal in the display driving signal; the first driving circuit is used for controlling the light transmittance of the bimodal film in a first working period of the display device to be first light transmittance, and controlling the light transmittance of the bimodal film in a second working period of the display device to be second light transmittance, wherein the first light transmittance is larger than the second light transmittance. The application sets the binary film in the display device to meet the requirements of different working time periods of the display device on the light transmittance, and multiplexes the display driving signals to control the light transmittance of the binary film, thereby simplifying the design of the driving system in the display device.
Description
[ field of technology ]
The application relates to the technical field of display, in particular to a display device.
[ background Art ]
The liquid crystal display device has the advantages of thin body, power saving, no radiation, soft picture and the like, and has wide application in the technical field of display.
In the conventional liquid crystal display device, a light sensing element (e.g., a camera) is generally integrated in the display device to enrich the functions of the display device. Meanwhile, in order to improve the screen ratio, the area of the light emitting surface of the display device corresponding to the light sensing element can be used for displaying.
Because the area corresponding to the light sensing element is not provided with a backlight source, the area needs to be supplemented with light by using a light supplementing lamp during display, and in order to make the light uniform, the haze of the film layer corresponding to the area is larger; however, when the light-sensitive element is operated, the light transmittance decreases due to the large haze of the film layer corresponding to the region, and the operation effect of the light-sensitive element is affected.
[ MEANS FOR SOLVING PROBLEMS ]
In view of the above, an embodiment of the present application provides a display device to solve the above-mentioned problems.
In a first aspect, an embodiment of the present application provides a display device, including a backlight module, a display panel, a bimodal film, a light supplementing lamp and a first driving circuit; the backlight module comprises an opening area, and the display panel is arranged on one side of the light emitting surface of the backlight module and covers the opening area; the bimodal film is positioned on one side of the display panel facing the backlight module, and the bimodal film projection covers the projection of the opening area along the thickness direction of the display device; the light supplementing lamp is positioned on one side of the bimodal film far away from the display panel, and the projection of the light supplementing lamp is covered by the projection of the opening area along the thickness direction of the display device; the first driving circuit is electrically connected with the bimodal film, and receives a first signal and a second signal which are display driving signals in the display device; the first driving circuit is used for controlling the light transmittance of the bimodal film in a first working period of the display device to be first light transmittance, and controlling the light transmittance of the bimodal film in a second working period of the display device to be second light transmittance, wherein the first light transmittance is larger than the second light transmittance.
In an implementation manner of the first aspect, the display device further includes a light sensing element, and the light sensing element at least partially overlaps the opening region along a thickness direction of the display device.
In one implementation of the first aspect, the light sensing element is turned on during a first operation period of the display device and turned off during a second operation period of the display device.
In one implementation of the first aspect, during a first operation period of the display device, the first driving circuit transmits a varying electrical signal to the bimodal film; in a second operating period of the display device, the bimodal film stops receiving the varying electrical signal.
In one implementation of the first aspect, the bimodal film is a polymer dispersed liquid crystal film.
In one implementation of the first aspect, the first driving circuit includes a first sub-circuit and a second sub-circuit; the first sub-circuit comprises a first output end, the second sub-circuit comprises a second output end, and the first output end and the second output end are respectively and electrically connected with the bimodal film; wherein the first sub-circuit receives the first signal and the second sub-circuit receives the second signal.
In one implementation manner of the first aspect, the first sub-circuit includes a first input terminal, the first input terminal receives the first signal, and the first signal is transmitted to the first output terminal; the second sub-circuit comprises a second input end, the second input end receives a second signal, and the second signal is transmitted to a second output end; the first signal and the second signal are both alternating current signals, and the first signal and the second signal are opposite phase signals.
In an implementation manner of the first aspect, the display device includes a shift register unit, where the shift register unit is used to drive a transistor for display in the display device; the shift register unit receives a first signal and a second signal.
In an implementation manner of the first aspect, the first signal and the second signal are different clock signals received by the shift register unit, respectively.
In an implementation manner of the first aspect, the first signal and the second signal are a reset control signal and a scan sequence control signal received by the shift register unit, respectively.
In an implementation manner of the first aspect, the first input terminal of the first sub-circuit further receives the second signal, and the second input terminal of the second sub-circuit further receives the first signal; the first input end and the second input end respectively receive the first signal and the second signal alternately, the time period of the first input end for receiving the first signal is different from the time period of the second input end for receiving the first signal, and the time period of the first input end for receiving the second signal is different from the time period of the second input end for receiving the second signal.
In one implementation manner of the first aspect, the first sub-circuit includes a first input terminal and a first resistor, one end of the first resistor is electrically connected to the first input terminal, and the other end of the first resistor is electrically connected to the first output terminal; the second sub-circuit comprises a second input end and a second resistor, one end of the second resistor is electrically connected with the second input end, and the other end of the second resistor is electrically connected with the second output end; the first input terminal and the second input terminal receive a first voltage; the first sub-circuit comprises a first switch, wherein the input end of the first switch receives zero potential, the output end of the first switch is electrically connected with the first output end, and the control end of the first switch receives a first signal; the second sub-circuit comprises a second switch, the input end of the second switch receives zero potential, the output end of the second switch is electrically connected with the second output end, and the control end of the second switch receives a second signal;
the first signal and the second signal control the first switch and the second switch to be alternately opened.
In one implementation manner of the first aspect, the first signal and the second signal are the same, and the first switch and the second switch are different in switch state under the control of the same signal.
In one implementation of the first aspect, the first switch is a P-type transistor and the second switch is an N-type transistor.
In one implementation manner of the first aspect, the backlight module includes a lamp strip including a plurality of light emitting devices; the input end of the lamp strip is electrically connected with the first input end of the first sub-circuit and the second input end of the second sub-circuit.
In the embodiment of the application, the first driving circuit controls the light transmittance of the bimodal film in the second working period of the display device to be smaller, so that the haze of the bimodal film can be improved, and the light emitted by the light supplementing lamp can be more uniformly emitted into the display panel after passing through the bimodal film, thereby being beneficial to improving the brightness uniformity of the display panel. In addition, the first driving circuit controls the binary film to have larger light transmittance in the first working period of the display device, so that the light transmittance of the binary film can be improved, and the working effect of the light sensing element is improved. According to the embodiment of the application, the requirements of different working periods of the display device on the light transmittance are met by arranging the binary film in the display device.
In addition, as the light transmittance of the binary film is controlled by the first driving circuit for receiving the display driving signal, that is, the display driving signal in the multiplexing display device controls the light transmittance of the binary film, no additional driving signal for controlling the light transmittance of the binary film is required, and the design of a driving system in the display device is simplified, so that the preparation difficulty of the display device is reduced.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present application;
fig. 4 is a schematic diagram of a first driving circuit according to an embodiment of the application;
fig. 5 is a timing chart of a display device according to an embodiment of the application;
FIG. 6 is a schematic diagram of a first driving circuit according to an embodiment of the present application;
fig. 7 is a schematic diagram of a display device according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a display device according to another embodiment of the present application;
FIG. 9 is a schematic diagram of a first driving circuit according to an embodiment of the present application;
FIG. 10 is a schematic diagram of a configuration of a first input terminal and a second input terminal according to the present application;
FIG. 11 is a schematic diagram of a first driving circuit according to an embodiment of the present application;
FIG. 12 is a schematic diagram illustrating a generation of a first voltage required by the first driving circuit shown in FIG. 11;
FIG. 13 is a schematic diagram illustrating another generation of the first voltage required by the first driving circuit shown in FIG. 11.
[ detailed description ] of the application
For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
The terminology used in the embodiments of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
In the description of the present specification, it is to be understood that the terms "substantially," "approximately," "about," "approximately," "substantially," and the like as used in the claims and embodiments of the application are intended to be inclusive of a reasonable process operation or tolerance and not an exact value.
It should be understood that although the terms first, second, etc. may be used in embodiments of the present application to describe signals, operating periods, inputs, outputs, etc., these signals, operating periods, inputs, outputs, etc. should not be limited to these terms. These terms are only used to distinguish signals, operating periods, inputs, outputs, etc. from one another. For example, a first signal may also be referred to as a second signal, and similarly, a second signal may also be referred to as a first signal, without departing from the scope of embodiments of the present application.
The applicant has provided a solution to the problems existing in the prior art by intensive studies.
Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present application, fig. 2 is a schematic structural diagram of another display device according to an embodiment of the present application, fig. 3 is a schematic structural diagram of another display device according to an embodiment of the present application, fig. 4 is a schematic structural diagram of a first driving circuit according to an embodiment of the present application, and fig. 5 is a timing diagram of a display device according to an embodiment of the present application.
The embodiment of the application provides a display device 100, as shown in fig. 1-3 and fig. 4 and 5, the display device 100 includes a backlight module 10, a display panel 20, a bimodal film 30, a light filling lamp 40 and a first driving circuit 50. The backlight module 10 includes an opening region P, the display panel 20 is disposed on a light-emitting surface side of the backlight module 10 and covers the opening region P, and the backlight module 10 is configured to provide backlight for the display panel 20. The bimodal film 30 is located at one side of the display panel 20 facing the backlight module 10, and along the thickness direction Z of the display device 100, the bimodal film 30 is projected to cover the opening area P.
Alternatively, as shown in fig. 1, the bimodal film 30 is located between the backlight module 10 and the display panel 20.
Alternatively, as shown in fig. 2, the bimodal film 30 is located at a side of the backlight module 10 away from the display panel 20.
In addition, as shown in fig. 3, a bimodal film may be located in the opening P.
The light supplement lamp 40 is located at a side of the bimodal film 30 away from the display panel 20, and along the thickness direction Z of the display device 100, the opening area P is projected to cover the light supplement lamp 40. That is, the light emitted from the light supplement lamp 40 passes through the bimodal film 30 and then is injected into the area of the display panel 20 covering the opening area P.
Specifically, as shown in fig. 1, 2 and 3, the display panel 20 includes a main display area AA and a light-transmitting display area BB, and the main display area AA at least partially surrounds the light-transmitting display area BB. The light-transmissive display area BB is projected to cover the opening area P along the thickness direction Z of the display device 100, and the light-compensating lamp 40 is used to backlight the light-transmissive display area BB.
The first driving circuit 50 is electrically connected to the bimodal film 30, and the first driving circuit 50 receives a first signal Xh1 and a second signal Xh2, wherein the first signal Xh1 and the second signal Xh2 are display driving signals in the display device 100.
The first driving circuit 50 is configured to control the light transmittance of the bimodal film 30 to be a first light transmittance during a first operation period T1 of the display device 100, and to control the light transmittance of the bimodal film to be a second light transmittance during a second operation period T2 of the display device 100, wherein the first light transmittance is greater than the second light transmittance.
Specifically, the display device 100 further includes a light sensing element 60, and the light sensing element 60 at least partially overlaps the opening region P in the thickness direction Z of the display device 100. The light sensing element 60 may be an electronic device such as a camera or an infrared identifier.
Further, the light sensing element 60 is turned on during a first operation period T1 of the display device 100 and turned off during a second operation period T2 of the display device 100.
It can be understood that when the light sensing element 60 is turned on, the light transmitting display area BB in the display panel 20 cannot display. That is, the light-transmitting display area BB is not capable of displaying in the first operation period T1 of the display device 100, and is capable of displaying in the second operation period T2 of the display device 100.
In the prior art, when the light-transmitting display area BB is displayed, in order to make the brightness of the light-transmitting display area BB uniform, the light emitted by the light-compensating lamp 40 generally passes through the film layer with larger haze and then enters the light-transmitting display area BB; when the light sensing element 60 is operated, the incident light enters the light sensing element 60 through the film layer with larger haze, and the light transmittance is reduced due to the larger haze of the film layer, so that the operation effect of the light sensing element 60 is affected.
The present inventors have considered that the period in which the light sensing element 60 operates is different from the period in which the light transmitting display region BB displays, then providing the bimodal film 30 in the display device 100 that can have different light transmittances in different periods becomes a solution.
In the embodiment of the application, the first driving circuit 50 controls the light transmittance of the binary film 30 in the second working period T2 of the display device 100 to be smaller, so that the haze of the binary film 30 can be improved, and the light emitted by the light compensating lamp 40 can be more uniformly emitted into the display panel 20 after passing through the binary film 30, which is beneficial to improving the brightness uniformity of the display panel 20. Moreover, the first driving circuit 50 controls the light transmittance of the bimodal film 30 in the first operation period T1 of the display device 100 to be larger, so that the light transmittance of the bimodal film 30 can be improved, thereby being beneficial to improving the operation effect of the light sensing element 60. The embodiments of the present application satisfy the light transmittance requirements of the display device 100 for different operating periods by providing the bimodal film 30 in the display device 100.
In addition, since the light transmittance of the bimodal film 30 is controlled by the first driving circuit 50 that receives the display driving signal, that is, the display driving signal in the multiplexed display device 100 controls the light transmittance of the bimodal film 30, there is no need to additionally set a driving signal for controlling the light transmittance of the bimodal film 30, which is beneficial to simplifying the design of the driving system in the display device 100, thereby being beneficial to reducing the manufacturing difficulty of the display device 100.
Referring to fig. 4 and 5, in one embodiment of the present application, the first driving circuit 50 transmits a varying electrical signal to the bimodal film 30 during a first operation period T1 of the display device 100; in the second operation period T2 of the display device 100, the bimodal film 30 stops receiving the varying electrical signal.
Alternatively, the bimodal film 30 is a polymer dispersed liquid crystal film.
From the characteristics of the polymer dispersed liquid crystal, it is known that the optical axis orientation of the liquid crystal can be adjusted by applying an electric field to the polymer dispersed liquid crystal, and the light transmittance of the polymer dispersed liquid crystal film can be improved. After the external electric field is removed, the liquid crystal particles can be restored to a scattering state, so that the light transmittance of the polymer dispersed liquid crystal film is reduced, and the haze of the polymer dispersed liquid crystal film is improved.
In the embodiment of the application, by utilizing the characteristics of the bimodal film 30, an external electric field is applied to the bimodal film 30 in the first working period T1 of the display device 100, so that the transmittance of the bimodal film 30 is larger, and the working effect of the light sensing element 60 is improved. In the second operation period T2 of the display device 100, the external electric field applied to the binary film 30 is removed, so that the binary film 30 has smaller light transmittance and larger haze, and the light emitted by the light compensating lamp 40 can be more uniformly injected into the display panel 20 after passing through the binary film 30, which is beneficial to improving the brightness uniformity of the display panel 20.
Fig. 6 is a schematic diagram of a first driving circuit according to an embodiment of the application.
In one embodiment of the present application, please continue to refer to fig. 4, the first driving circuit 50 includes a first sub-circuit 51 and a second sub-circuit 52; the first sub-circuit 51 includes a first output terminal 51B, the second sub-circuit 52 includes a second output terminal 52B, and the first output terminal 51B and the second output terminal 52B are electrically connected to the bimodal film 30, respectively.
Wherein the first sub-circuit 51 receives the first signal Xh1 and the second sub-circuit 52 receives the second signal Xh2.
In one embodiment of the present application, as shown in fig. 5 and 6, the first sub-circuit 51 includes a first input terminal 51A, the first input terminal 51A receives a first signal Xh1, and the first signal Xh1 is transmitted to a first output terminal 51B. The second sub-circuit 52 includes a second input 52A, the second input 52A receives a second signal Xh2, and the second signal Xh2 is transmitted to a second output 52B.
That is, the bimodal film 30 receives the first signal Xh1 and the second signal Xh2.
The first signal Xh1 and the second signal Xh2 are both alternating current signals, and the first signal Xh1 and the second signal Xh2 are opposite phase signals.
In this technical solution, the first signal Xh1 and the second signal Xh2, which are opposite signals and alternating signals, are directly applied to the binary film 30, that is, an external electric field is applied to the binary film 30. From the above analysis, it is found that the application of the external electric field to the bimodal film 30 can make the transmittance of the bimodal film 30 larger, thereby being beneficial to improving the operation effect of the light sensing element 60. In addition, the first signal Xh1 and the second signal Xh2 are both ac signals, so that the electric field applied to the binary film 30 will change, which is beneficial to avoiding polarization of the liquid crystal in the binary film 30, thereby avoiding that the polarized liquid crystal is not deflected in place and affects the transmittance of the binary film 30.
Fig. 7 is a schematic diagram of a display device according to an embodiment of the present application, and fig. 8 is a schematic diagram of another display device according to an embodiment of the present application.
In one implementation of the present technical solution, as shown in fig. 7 and 8, the display device 100 includes a shift register unit 101, where the shift register unit 101 is used to drive a transistor T for display in the display device 100, and the transistor T may be used to transmit a data signal Vdate to a pixel electrode 102 in the display device 100. I.e. the signal transmitted by the shift register unit 101, can control the on-off state of the transistor T for display in the display device 100.
Wherein the shift register unit 101 receives a first signal Xh1 and a second signal Xh2.
Alternatively, as shown in fig. 7, the first signal Xh1 and the second signal Xh2 are different clock signals received by the shift register unit 101, respectively. The first signal Xh1 may be a first clock signal CLK received by the shift register unit 101, and the second signal Xh2 may be a second clock signal XCLK received by the shift register unit 101, where the first clock signal CLK and the second clock signal XCLK are opposite signals.
Alternatively, as shown in fig. 8, the first signal Xh1 and the second signal Xh2 are a reset control signal Greset and a scan sequence control signal U2D received by the shift register unit 101, respectively. The reset control signal Greset and the scan sequence control signal U2D are inverted signals. The reset control signal Greset may be a control signal for resetting the output terminal of the shift register unit 101, and the scan sequence control signal U2D may be a forward scan signal or a reverse scan signal received by the shift register unit 101.
In this implementation manner, the signals received by the shift register unit 101 are multiplexed into the first signal Xh1 and the second signal Xh2 applied to the binary film 30, so that no additional driving signal is required to be set for controlling the light transmittance of the binary film 30, which is beneficial to simplifying the design of the driving system in the display device 100, and thus is beneficial to reducing the manufacturing difficulty of the display device 100.
Note that, the first signal Xh1 and the second signal Xh2 may also be other signals received by the shift register unit 101, which are opposite to each other. The first signal Xh1 and the second signal Xh2 may be other display driving signals of the display device 100, which are inverted with respect to each other.
Fig. 9 is a schematic diagram of a first driving circuit according to an embodiment of the present application, and fig. 10 is a schematic diagram of a configuration of a first input terminal and a second input terminal according to the present application.
In this embodiment, further, the first input terminal 51A of the first sub-circuit 51 further receives the second signal Xh2, and the second input terminal 52A of the second sub-circuit 52 further receives the first signal Xh1.
Wherein the first input terminal 51A and the second input terminal 52A alternately receive the first signal Xh1 and the second signal Xh2, respectively, and a period in which the first input terminal 51A receives the first signal Xh1 is different from a period in which the second input terminal 52A receives the first signal Xh1, and a period in which the first input terminal 51A receives the second signal Xh2 is different from a period in which the second input terminal 52A receives the second signal Xh2.
That is, the first input terminal 51A alternately receives the first signal Xh1 and the second signal Xh2, the second input terminal 52A alternately receives the first signal Xh1 and the second signal Xh2, and the period in which the first input terminal 51A receives the first signal Xh1 is the same as the period in which the second input terminal 52A receives the second signal Xh2, and the period in which the first input terminal 51A receives the second signal Xh2 is the same as the period in which the second input terminal 52A receives the first signal Xh1.
For example, as shown in connection with fig. 9 and 10, the first operation period T1 of the display device 100 includes a plurality of sub-periods T1, T2 … T2n-1, T2n, where n≡1. Each sub-period may be a period in which the display apparatus 100 displays one frame of picture. In the sub-period t1, the first input terminal 51A receives the first signal Xh1, and the second input terminal 52A receives the second signal Xh2; in the sub-period t2, the first input terminal 51A receives the second signal Xh2, and the second input terminal 52A receives the first signal Xh1. The first input terminal 51A and the second input terminal 52A alternately receive the first signal Xh1 and the second signal Xh2 in adjacent sub-periods respectively until the first input terminal 51A receives the first signal Xh1 and the second input terminal 52A receives the second signal Xh2 in the sub-period t2 n-1; during the sub-period t2n, the first input terminal 51A receives the second signal Xh2, and the second input terminal 52A receives the first signal Xh1.
In this technical solution, the first input end 51A and the second input end 52A are configured to alternately receive the first signal Xh1 and the second signal Xh2, respectively, so that the electric field applied to the binary film 30 can be periodically changed, which is beneficial to avoiding polarization of the liquid crystal in the binary film 30, so that the polarized liquid crystal is not deflected in place, and the light transmittance of the binary film 30 is beneficial to be avoided. The present solution is beneficial to improving the stability of the first light transmittance of the bimodal film 30, and meets the requirement of the light sensing element 60 for the light transmittance of the bimodal film 30 when the first operating period T1 of the display device 100 is longer.
It should be noted that, the first signal Xh1 may be provided by a first signal terminal, the second signal Xh2 may be provided by a second signal terminal, the first input terminal 51A and the second input terminal 52A may be electrically connected to the first signal terminal and the second signal terminal respectively through a switching tube, and the first input terminal 51A and the second input terminal 52A are alternately connected to the first signal terminal and the second signal terminal respectively through controlling the switching tube, so that the first input terminal 51A and the second input terminal 52A alternately receive the first signal Xh1 and the second signal Xh2 respectively. And the first input terminal 51A is electrically connected to the first signal terminal, the second input terminal 52A is electrically connected to the second signal terminal; when the first input terminal 51A is electrically connected to the second signal terminal, the second input terminal 52A is electrically connected to the first signal terminal; optionally, the first signal terminal and the second signal terminal only need to provide fixed potential voltage, so as to avoid frequent voltage switching.
Fig. 11 is a schematic diagram of a first driving circuit according to an embodiment of the application.
In still another technical solution of the embodiment of the present application, as shown in fig. 11, the first sub-circuit 51 includes a first input terminal 51A and a first resistor R1, one end of the first resistor R1 is electrically connected to the first input terminal 51A, and the other end is electrically connected to the first output terminal 51B; the second sub-circuit 52 includes a second input terminal 52A and a second resistor R2, one end of the second resistor R2 is electrically connected to the second input terminal 52A, and the other end is electrically connected to the second output terminal 52B; the first input terminal 51A and the second input terminal 52A receive a first voltage V1.
Optionally, the first voltage V1 is 30V.
The first sub-circuit 51 includes a first switch K1, an input terminal K11 of the first switch K1 receives the zero potential GND, an output terminal K12 is electrically connected to the first output terminal 51B, and a control terminal K13 receives the first signal Xh1.
The second sub-circuit 52 includes a second switch K2, the input terminal K21 of the second switch K2 receives the zero potential GND, the output terminal K22 is electrically connected to the second output terminal 52B, and the control terminal K23 receives the second signal XH2.
The first signal Xh1 and the second signal Xh2 control the first switch K1 and the second switch K2 to be turned on alternately.
Optionally, the first signal Xh1 and the second signal Xh2 are the same, and the first switch K1 and the second switch K2 are different in switch state under the control of the same signal.
Further, the first switch K1 may be a P-type transistor, and the second switch K2 may be an N-type transistor.
In this technical scheme, when the first signal Xh1 controls the first switch K1 to be turned on, the second signal Xh2 controls the second switch K2 to be turned off. At this time, the first switch K1 transmits the received zero potential GND to the first output terminal 51B, and the second input terminal 52A transmits the received first voltage V1 to the second output terminal 52B. When the first signal Xh1 controls the first switch K1 to be turned off, the second signal Xh2 controls the second switch K2 to be turned on. At this time, the second switch K2 transmits the received zero potential GND to the second output terminal 52B, and the first input terminal 51A transmits the received first voltage V1 to the first output terminal 51B. Since the first signal Xh1 and the second signal Xh2 control the first switch K1 and the second switch K2 to be turned on alternately, the application of the varying electrical signal on the binary film 30 is equivalent to that of the binary film 30, so that the light transmittance of the binary film 30 can be the first light transmittance.
Fig. 12 is a schematic diagram of one generation of the first voltage required by the first driving circuit shown in fig. 11, and fig. 13 is another generation of the first voltage required by the first driving circuit shown in fig. 11.
In one implementation of the present disclosure, as shown in fig. 12 and 13, the backlight module 10 includes a lamp strip 11, and the lamp strip 11 includes a plurality of light emitting devices 110. In addition, the backlight module 10 further includes a power chip 12, and the power chip 12 is electrically connected to the lamp strip 11.
The input 11A of the lamp strip 11 is electrically connected to the first input 51A of the first sub-circuit 51 and the second input 52A of the second sub-circuit 52.
That is, the first voltage V1 received by the first input terminal 51A of the first sub-circuit 51 and the second input terminal 52A of the second sub-circuit 52 may be provided by the lamp strip 11.
In this technical solution, the voltage of the lamp strip 11 is multiplexed into the first voltage V1 received by the first sub-circuit 51 and the second sub-circuit 52, so that no additional receiving voltage is required for the first input end 51A of the first sub-circuit 51 and the second input end 52A of the second sub-circuit 52, which is beneficial to reducing the design difficulty and saving the power consumption.
As shown in fig. 13, when the voltage at the input terminal 11A of the lamp strip 11 is smaller than the voltage requirement of the first sub-circuit 51 and the second sub-circuit 52 for the first voltage V1, a compensation resistor Rb may be connected in series to the lamp strip 11 to increase the voltage at the input terminal 11A of the lamp strip 11 so as to satisfy the voltage requirement of the first sub-circuit 51 and the second sub-circuit 52 for the first voltage V1.
Compared with the prior art, the display device 100 provided by the embodiment of the application has at least the following advantages:
in the display device 100 provided in the embodiment of the application, the first driving circuit 50 controls the light transmittance of the bimodal film 30 in the second working period T2 of the display device 100 to be smaller, so that the haze of the bimodal film 30 can be improved, and the light emitted by the light compensating lamp 40 can be more uniformly emitted into the display panel 20 after passing through the bimodal film 30, which is beneficial to improving the brightness uniformity of the display panel 20. Moreover, the first driving circuit 50 controls the light transmittance of the bimodal film 30 in the first operation period T1 of the display device 100 to be larger, so that the light transmittance of the bimodal film 30 can be improved, thereby being beneficial to improving the operation effect of the light sensing element 60. The embodiments of the present application satisfy the light transmittance requirements of the display device 100 for different operating periods by providing the bimodal film 30 in the display device 100.
In addition, since the light transmittance of the bimodal film 30 is controlled by the first driving circuit 50 that receives the display driving signal, that is, the display driving signal in the multiplexed display device 100 controls the light transmittance of the bimodal film 30, there is no need to additionally set a driving signal for controlling the light transmittance of the bimodal film 30, which is beneficial to simplifying the design of the driving system in the display device 100, thereby being beneficial to reducing the manufacturing difficulty of the display device 100.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the application.
Claims (12)
1. A display device, comprising:
the backlight module comprises an opening area;
the display panel is arranged on one side of the light emitting surface of the backlight module and covers the opening area;
the bimodal film is positioned on one side of the display panel facing the backlight module; the bimodal film projection covers the projection of the opening area along the thickness direction of the display device;
the light supplementing lamp is positioned at one side of the bimodal film far away from the display panel, and the projection of the light supplementing lamp is covered by the projection of the opening area along the thickness direction of the display device;
the first driving circuit is electrically connected with the bimodal film; the first driving circuit receives a first signal and a second signal, wherein the first signal and the second signal are display driving signals in the display device;
the first driving circuit is used for controlling the light transmittance of the bimodal film in a first working period of the display device to be first light transmittance, and controlling the light transmittance of the bimodal film in a second working period of the display device to be second light transmittance; the first light transmittance is greater than the second light transmittance;
the display device comprises a shift register unit, wherein the shift register unit is used for driving a transistor used for displaying in the display device;
the first driving circuit comprises a first sub-circuit and a second sub-circuit; the first sub-circuit comprises a first output end, the second sub-circuit comprises a second output end, and the first output end and the second output end are respectively and electrically connected with the bimodal film; the first sub-circuit receives the first signal, and the second sub-circuit receives the second signal;
wherein the first signal and the second signal are signals received by the shift register unit; and/or the first sub-circuit comprises a first input end and a first resistor, wherein one end of the first resistor is electrically connected with the first input end, and the other end of the first resistor is electrically connected with the first output end; the second sub-circuit comprises a second input end and a second resistor, one end of the second resistor is electrically connected with the second input end, and the other end of the second resistor is electrically connected with the second output end; the first input terminal and the second input terminal receive a first voltage; the first sub-circuit comprises a first switch, wherein the input end of the first switch receives zero potential, the output end of the first switch is electrically connected with the first output end, and the control end of the first switch receives a first signal; the second sub-circuit comprises a second switch, the input end of the second switch receives zero potential, the output end of the second switch is electrically connected with the second output end, and the control end of the second switch receives a second signal; the first signal and the second signal control the first switch and the second switch to be alternately opened.
2. The display device according to claim 1, further comprising a light-sensitive element that at least partially overlaps the opening region in a thickness direction of the display device.
3. The display device of claim 2, wherein the light sensing element is on for a first period of operation of the display device and off for a second period of operation of the display device.
4. A display device according to claim 3, wherein the first drive circuit transmits a varying electrical signal to the bimodal film during a first period of operation of the display device; during a second period of operation of the display device, the bimodal film ceases to receive the varying electrical signal.
5. The display device according to claim 1, wherein the bimodal film is a polymer dispersed liquid crystal film.
6. The display device according to claim 1, wherein when the first signal and the second signal are signals received by the shift register unit, the first sub-circuit includes a first input terminal that receives the first signal and transmits the first signal to the first output terminal; the second sub-circuit comprises a second input end, the second input end receives the second signal, and the second signal is transmitted to the second output end;
the first signal and the second signal are both alternating current signals, and the first signal and the second signal are opposite phase signals.
7. The display device according to claim 6, wherein the first signal and the second signal are different clock signals received by the shift register unit, respectively.
8. The display device according to claim 6, wherein the first signal and the second signal are a reset control signal and a scan order control signal received by the shift register unit, respectively.
9. The display device of claim 6, wherein the first input of the first sub-circuit further receives a second signal and the second input of the second sub-circuit further receives the first signal;
the first input end and the second input end respectively and alternately receive the first signal and the second signal, the time period of the first input end for receiving the first signal is different from the time period of the second input end for receiving the first signal, and the time period of the first input end for receiving the second signal is different from the time period of the second input end for receiving the second signal.
10. The display device according to claim 1, wherein when the first signal and the second signal control the first switch and the second switch to be alternately turned on, the first signal and the second signal are the same, and a switching state of the first switch and the second switch under the control of the same signal is different.
11. The display device of claim 10, wherein the first switch is a P-type transistor and the second switch is an N-type transistor.
12. The display apparatus of claim 1, wherein the backlight module comprises a light strip comprising a plurality of light emitting devices;
when the first input end and the second input end receive a first voltage, the input end of the lamp strip is electrically connected with the first input end of the first sub-circuit and the second input end of the second sub-circuit.
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| CN105159507A (en) * | 2015-10-22 | 2015-12-16 | 厦门天马微电子有限公司 | Array substrate, touch control display device and driving method thereof |
| CN109739040A (en) * | 2019-02-25 | 2019-05-10 | 京东方科技集团股份有限公司 | A kind of light modulation piece, backlight module, display device and its driving method |
| CN112992083A (en) * | 2021-04-01 | 2021-06-18 | 上海天马微电子有限公司 | Drive circuit, display panel and display device |
| CN113777832A (en) * | 2021-09-17 | 2021-12-10 | 武汉华星光电技术有限公司 | Display panel and electronic device |
| CN113867050A (en) * | 2021-10-19 | 2021-12-31 | 厦门天马微电子有限公司 | Display module and display device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101013211B (en) * | 2006-01-31 | 2010-10-13 | Nec液晶技术株式会社 | Display device, terminal device, and display panel |
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| CN105159507A (en) * | 2015-10-22 | 2015-12-16 | 厦门天马微电子有限公司 | Array substrate, touch control display device and driving method thereof |
| CN109739040A (en) * | 2019-02-25 | 2019-05-10 | 京东方科技集团股份有限公司 | A kind of light modulation piece, backlight module, display device and its driving method |
| CN112992083A (en) * | 2021-04-01 | 2021-06-18 | 上海天马微电子有限公司 | Drive circuit, display panel and display device |
| CN113777832A (en) * | 2021-09-17 | 2021-12-10 | 武汉华星光电技术有限公司 | Display panel and electronic device |
| CN113867050A (en) * | 2021-10-19 | 2021-12-31 | 厦门天马微电子有限公司 | Display module and display device |
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