CN107621709B

CN107621709B - Display panel and display device

Info

Publication number: CN107621709B
Application number: CN201710936997.5A
Authority: CN
Inventors: 孔祥建
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2017-10-10
Filing date: 2017-10-10
Publication date: 2020-06-05
Anticipated expiration: 2037-10-10
Also published as: CN107621709A

Abstract

The application discloses a display panel and a display device, wherein the display panel comprises a plurality of sub-pixel regions which are arranged in an array mode, four driving switches are arranged in each sub-pixel region, and the display panel further comprises a first electrode and a second electrode which are oppositely arranged; the first driving switch and the second driving switch are respectively coupled with the first electrode, and the third driving switch and the fourth driving switch are respectively coupled with the second electrode; the display panel further comprises a first driving chip, a second driving chip, a first constant voltage input end and a second constant voltage input end, wherein the first driving chip and the first constant voltage input end are alternately coupled to a second driving switch and a first driving switch, the second constant voltage input end and the second driving chip are alternately coupled to a third driving switch and a fourth driving switch, the first driving switch and the second driving switch are alternately conducted, and the fourth driving switch and the third driving switch are alternately conducted. The constant voltage and the driving chip voltage can reduce the driving voltage required by the liquid crystal display.

Description

Display panel and display device

Technical Field

The present application relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

Liquid crystal displays are widely used in various fields with the advantages of small size, light weight, low radiation, and the like. The liquid crystal display panel is the most important component of the liquid crystal display. The working principle of the liquid crystal display is as follows: the display state of the liquid crystal display is changed by changing the voltage applied to the liquid crystal layer to change the deflection angle of the liquid crystal molecules, thereby controlling the rotation direction and the polarization state of the polarized light.

With the continuous development of the technology, in order to meet different requirements of people on the liquid crystal display device, the transparent liquid crystal display device is provided, people can see objects placed behind the transparent liquid crystal display device through the transparent liquid crystal display device, information can be displayed on a panel of the transparent liquid crystal display device, the transparent liquid crystal display device can be applied to show window display, a customer can see commodities behind the transparent liquid crystal display device through the transparent liquid crystal display device, and meanwhile, the related information of the commodities can be displayed on the panel of the transparent liquid crystal display device, so that the transparent liquid crystal display device is very convenient.

Considering that the liquid crystal used by the transparent liquid crystal display device is different from the liquid crystal used by the common liquid crystal display device, the operating voltage required for driving the liquid crystal of the common liquid crystal display device is smaller, while the operating voltage required for driving the liquid crystal used by the transparent liquid crystal display device is higher, the driving chip of the existing common liquid crystal display device can not drive the liquid crystal of the transparent liquid crystal display device, so that the transmittance of the transparent display device is greatly reduced, and the display effect of the transparent display device is influenced.

Disclosure of Invention

In view of this, the present application provides a display panel and a display device, where a first constant voltage input terminal and a second constant voltage input terminal are introduced on the basis of a first driving chip and a second driving chip, and a higher voltage can be respectively input to a first electrode and a second electrode through the first constant voltage input terminal and the second constant voltage input terminal, so that even when the voltages respectively input to the first electrode and the second electrode by the first driving chip and the second driving chip are smaller, the driving voltage between the first electrode and the second electrode can be increased, thereby facilitating to increase the transmittance of the display panel and the display device, and improving the display effect of the display panel and the display device.

In order to solve the technical problem, the following technical scheme is adopted:

in a first aspect, the present application provides a display panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate;

the display panel comprises a plurality of sub-pixel regions which are arranged in an array mode, and a first driving switch, a second driving switch, a third driving switch and a fourth driving switch are arranged in each sub-pixel region;

each sub-pixel region further comprises a first electrode and a second electrode which are arranged between the first substrate and the second substrate, and the first electrode and the second electrode are oppositely arranged;

the first driving switch and the second driving switch are respectively coupled with the first electrode, and the third driving switch and the fourth driving switch are respectively coupled with the second electrode;

the display panel further includes a first driving chip, a second driving chip, a first constant voltage input terminal and a second constant voltage input terminal, wherein the first driving chip and the first constant voltage input terminal are alternately coupled to the second driving switch and the first driving switch, the second constant voltage input terminal and the second driving chip are alternately coupled to the third driving switch and the fourth driving switch, wherein the first driving switch and the second driving switch are alternately turned on, and the third driving switch and the fourth driving switch are alternately turned on.

Optionally, wherein:

in two adjacent frame times, the first driving switch and the second driving switch alternately input a first voltage and a second voltage to the first electrode, the fourth driving switch and the third driving switch alternately input the second voltage and the first voltage to the second electrode, a voltage difference between the first voltage and the second voltage is greater than or equal to a threshold voltage of the liquid crystal layer, and the threshold voltage is a voltage at which transmittance of the display panel starts to change.

Optionally, wherein:

the first voltage is greater than the second voltage.

Optionally, wherein:

the first voltage is a constant voltage, and the second voltage is a data gray scale voltage which changes according to gray scales.

Optionally, wherein:

the first driving switches and the second driving switches are respectively arranged on the first substrate in an array;

the first substrate comprises a plurality of first gate lines and second gate lines which are arranged along a first direction and extend along a second direction, and a plurality of first data signal lines and second data signal lines which extend along the first direction and are arranged along the second direction, wherein the first gate lines and the second gate lines are alternately arranged, and the first data signal lines and the second data signal lines are alternately arranged;

the gates of the first driving switches in the same row are connected to the same first gate line, the sources of the first driving switches in the same column are connected to the same first data signal line, and the drains of the first driving switches are respectively coupled to the first electrodes in a one-to-one correspondence manner; the gates of the second driving switches in the same row are connected to the same second gate line, the sources of the second driving switches in the same column are connected to the same second data signal line, and the drains of the second driving switches are respectively coupled to the first electrodes in a one-to-one correspondence.

Optionally, wherein:

the first driving chip is electrically connected with each second data signal line, the first gate line and the second gate line;

the first constant voltage input terminal is electrically connected to each of the first data signal lines.

Optionally, wherein:

the third driving switches and the fourth driving switches are respectively arranged on the second substrate in an array;

the second substrate comprises a plurality of third gate lines and fourth gate lines which are arranged along a first direction and extend along a second direction, and a plurality of third data signal lines and fourth data signal lines which extend along the first direction and are arranged along the second direction, wherein the third gate lines and the fourth gate lines are alternately arranged, and the third data signal lines and the fourth data signal lines are alternately arranged;

the gates of the third driving switches in the same row are connected to the same third gate line, the sources of the third driving switches in the same column are connected to the same third data signal line, and the drains of the third driving switches are respectively coupled to the second electrodes in a one-to-one correspondence; the gates of the fourth driving switches in the same row are connected to the same fourth gate line, the sources of the fourth driving switches in the same column are connected to the same fourth data signal line, and the drains of the fourth driving switches are respectively coupled to the second electrodes in a one-to-one correspondence manner.

Optionally, wherein:

the second driving chip is electrically connected with each fourth data signal line, the third gate line and the fourth gate line;

the second constant voltage input terminal is electrically connected to each of the third data signal lines.

Optionally, wherein:

the first driving chip and the second driving chip are the same.

Optionally, wherein:

the liquid crystal layer comprises polymer stabilized cholesteric liquid crystal, polymer network liquid crystal and polymer dispersed liquid crystal.

In a second aspect, the present application further provides a display device, including a display panel, where the display panel is the display panel provided in the present application.

Compared with the prior art, this application display panel and display device, reached following effect:

in the display panel and the display device provided by the application, the first driving switch and the second driving switch in each sub-pixel region are respectively coupled to the first electrode, the third driving switch and the fourth driving switch are respectively coupled to the second electrode, the first driving chip and the first constant voltage input terminal are alternately coupled to the second driving switch and the first driving switch to alternately input different voltages to the first electrode, and the second driving chip and the second constant voltage input terminal are alternately coupled to the fourth driving switch and the third driving switch to alternately input different voltages to the second electrode. Considering that higher voltages can be respectively input to the first electrode and the second electrode through the first constant voltage input end and the second constant voltage input end, even when the voltages respectively input to the first electrode and the second electrode by the first driving chip and the second driving chip are smaller, the driving voltage between the first electrode and the second electrode can be increased, and the increase of the driving voltage between the first electrode and the second electrode is beneficial to increasing the transmittance of the display panel and the display device, and the display effect of the display panel and the display device is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a cross-sectional view of a display panel according to an embodiment of the present disclosure;

fig. 2 is a top view of a display panel according to an embodiment of the present disclosure;

fig. 3 is a circuit structure diagram of a first substrate in a display panel according to an embodiment of the present disclosure;

fig. 4 is a circuit structure diagram of a second substrate in a display panel according to an embodiment of the present disclosure;

FIG. 5 is a diagram illustrating a connection relationship between a first driver chip and a first constant voltage input terminal on a first substrate in a display panel according to an embodiment of the disclosure;

FIG. 6 is a diagram illustrating a connection relationship between a second driver chip and a second constant voltage input terminal on a second substrate in a display panel according to an embodiment of the disclosure;

fig. 7 is a timing diagram illustrating an operation of the display panel according to the embodiment of the present application;

FIG. 8 is a graph showing the relationship between driving voltage and transmittance in three different polymer stabilized cholesteric liquid crystals provided in the examples of the present application;

FIG. 9 is another cross-sectional view of a display panel useful in embodiments of the present application;

fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.

Detailed Description

As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.

Fig. 1 is a cross-sectional view of a display panel provided in an embodiment of the present application, fig. 2 is a top view of the display panel provided in the embodiment of the present application, fig. 3 is a circuit structure diagram of a first substrate in the display panel provided in the embodiment of the present application, fig. 4 is a circuit structure diagram of a second substrate in the display panel provided in the embodiment of the present application, fig. 5 is a connection relationship diagram of a first driving chip and a first constant voltage input terminal on the first substrate in the display panel provided in the embodiment of the present application, fig. 6 is a connection relationship diagram of a second driving chip and a second constant voltage input terminal on the second substrate in the display panel provided in the embodiment of the present application, and with reference to fig. 1 to fig. 6, the embodiment of the present application provides a display panel 100, including: a first substrate 10 and a second substrate 20 disposed opposite to each other, and a liquid crystal layer 30 disposed between the first substrate 10 and the second substrate 20;

the display panel 100 includes a plurality of sub-pixel regions 40 arranged in an array, and each sub-pixel region 40 is provided with a first driving switch 51, a second driving switch 52, a third driving switch 53 and a fourth driving switch 54;

each sub-pixel region 40 further includes a first electrode 11 and a second electrode 12 disposed between the first substrate 10 and the second substrate 20, the first electrode 11 and the second electrode 12 being disposed opposite to each other;

a first driving switch 51 and a second driving switch 52 are respectively coupled to the first electrode 11, and a third driving switch 53 and a fourth driving switch 54 are respectively coupled to the second electrode 12;

the display panel 100 further includes a first driving chip 61, a second driving chip 62, a first constant voltage input terminal 71 and a second constant voltage input terminal 72, the first driving chip 61 and the first constant voltage input terminal 71 are alternately coupled to the second driving switch 52 and the first driving switch 51, the second constant voltage input terminal 72 and the second driving chip 62 are alternately coupled to the third driving switch 53 and the fourth driving switch 54, wherein the first driving switch 51 and the second driving switch 52 are alternately turned on, and the fourth driving switch 54 and the third driving switch 53 are alternately turned on.

Specifically, referring to fig. 1 and fig. 6, a display panel 100 according to an embodiment of the present disclosure includes a first substrate 10 and a second substrate 20 that are disposed opposite to each other, a liquid crystal layer 30 is disposed between the first substrate 10 and the second substrate 20, a plurality of sub-pixel regions 40 are disposed on the display panel 100 and arranged in an array along a first direction and a second direction, and the first direction and the second direction are crossed, see fig. 2. Each sub-pixel region 40 includes a first electrode 11 and a second electrode 12 disposed opposite to each other, and referring to fig. 1, by applying a voltage to the first electrode 11 and the second electrode 12, an electric field for driving the liquid crystal 30 to be deflected is formed between the first electrode 11 and the second electrode 12, so as to complete the display of the display panel 100. In particular, each sub-pixel region 40 in the embodiment of the present application further includes four driving switches, referring to fig. 3 to 6, a drain 513 of a first driving switch 51 and a drain 523 of a second driving switch 52 of the four driving switches are both coupled to the first electrode 11, a drain 533 of a third driving switch 53 and a drain 543 of a fourth driving switch 54 are both coupled to the second electrode 12, wherein a source 512 of the first driving switch 51 and a source 522 of the second driving switch 52 are alternately coupled to the first constant voltage input terminal 71 and the first driving chip 61, and a source 532 of the third driving switch 53 and a source 542 of the fourth driving switch 54 are alternately coupled to the second constant voltage input terminal 72 and the second driving chip 62, respectively. During a certain period of time, the first driving switch 51 is turned on, the first constant voltage input terminal 71 is electrically connected to the first electrode 11 through the first driving switch 51 under the control of the first switch 91, the first constant voltage input terminal 71 supplies a constant voltage to the first electrode 11 through the first driving switch 51, and the second driving switch 52 is turned off, see fig. 5; meanwhile, the fourth driving switch 54 is turned on, the second driving chip 62 is electrically connected to the second electrode 12 through the fourth driving switch 54, the second driving chip 62 supplies a voltage to the second electrode 12 through the fourth driving switch 54, and the third driving switch 53 is turned off, see fig. 6. In the next period, the second driving switch 52 is turned on, the first driving chip 61 is electrically connected to the first electrode 11 through the second driving switch 52, the first driving chip 61 supplies a voltage to the first electrode 11 through the second driving switch 52, and the first driving switch 51 is turned off; while the third driving switch 53 is turned on, the second constant voltage input terminal 72 is electrically connected to the second electrode 12 through the third driving switch 53 under the control of the third switch 93, the second constant voltage input terminal 72 supplies a constant voltage to the second electrode 12, and the fourth driving switch 54 is turned off, see fig. 5 and 6. That is, when the first electrode 11 inputs a constant voltage, the second electrode 12 inputs a voltage supplied from the second driving chip 62, and when the first electrode 11 inputs a voltage supplied from the first driving chip 61, the second electrode 12 inputs a constant voltage. The voltage for driving the liquid crystal to deflect is a voltage difference between the first electrode 11 and the second electrode 12, and since the first constant voltage input terminal 71 and the second constant voltage input terminal 72 can respectively input a higher voltage to the first electrode 11 and the second electrode 12, for example, the higher voltage can reach 22V to 38V, and the voltage can be directly provided by an external circuit, even when the voltage input to the first electrode 11 and the second electrode 12 by the first driving chip 61 and the second driving chip 62 is smaller, for example, the smaller voltage ranges from 0V to 10V, or-5V to 5V, the driving voltage between the first electrode 11 and the second electrode 12 can still be increased, and increasing the driving voltage between the first electrode 11 and the second electrode 12 is beneficial to increasing the transmittance of the display panel 100, and improving the display effect of the display panel 100.

Alternatively, referring to fig. 3 and 5, the first driving switches 51 and the second driving switches 52 are respectively arranged on the first substrate 10 in an array;

the first substrate 10 includes a plurality of first gate lines 21 and second gate lines 22 arranged in a first direction and extending in a second direction, and a plurality of first data signal lines 31 and second data signal lines 32 extending in the first direction and arranged in the second direction, the first gate lines 21 and the second gate lines 22 being alternately arranged, the first data signal lines 31 and the second data signal lines 32 being alternately arranged;

the gates 511 of the first driving switches 51 in the same row are connected to the same first gate line 21, the sources 512 of the first driving switches 51 in the same column are connected to the same first data signal line 31, and the drains 513 of the first driving switches 51 are respectively coupled to the first electrodes 11 in a one-to-one correspondence; the gates 521 of the second driving switches 52 in the same row are connected to the same second gate line 22, the sources 522 of the second driving switches 52 in the same column are connected to the same second data signal line 32, and the drains 523 of the second driving switches 52 are respectively coupled to the first electrodes 11 in a one-to-one correspondence.

Specifically, with continuing reference to fig. 3 and 5, the first substrate 10 and the second substrate 20 in the embodiment of the present application respectively include two sets of gate lines and two sets of data signal lines thereon, on the first substrate 10, the first gate lines 21 and the second gate lines 22 are disposed in parallel and alternately, the first data signal lines 31 and the second data signal lines 32 are disposed in parallel and alternately, the gates of the first driving switches 51 located in the same row on the first substrate 10 are connected to the same first gate line 21, the gates of the second driving switches 52 located in the same row are connected to the same second gate line 22, the sources 512 of the first driving switches 51 located in the same column are connected to the same first data signal line 31, the sources 522 of the second driving switches 52 located in the same column are connected to the same second data signal line 32, and the

drains

513 and 523 of the first driving switches 51 and the second driving switches 52 are connected to the first electrodes 11, respectively. Thus, the first driving switch 51 and the second driving switch 52 are individually controlled, the first gate line 21 and the first data signal line 31 control the first driving switch 51 and transmit a data signal, and the second gate line 22 and the second data signal line 32 control the second driving switch 52 and transmit a signal, so that the first driving switch 51 and the second driving switch 52 are alternately turned on during the nth frame and the (n + 1) th frame, and the first voltage having a large voltage value and the second voltage having a small voltage value are alternately input to the first electrode 11. It should be noted that, in the embodiment shown in fig. 3, the second data signal lines 32 are all connected to the first driving chip 61 in a manner as shown in fig. 5, the first driving chip 61 includes a plurality of data output terminals, each data output terminal is connected to one second data signal line 32, the data output terminal and the first constant voltage input terminal 71 on the first driving chip 61 are alternately coupled to the second driving switch 52 and the first driving switch 51, where the alternate frequency can be set as one frame. For example, in a first frame time, the first driving switch 51 is turned off, the second driving switch 52 is turned on, the data output terminal of the first driving chip 61 is electrically connected to the first electrode 11 through the second driving switch 52, and the first driving chip 61 inputs a second voltage with a smaller voltage value to the first electrode 11 through the second driving switch 52; in the second frame time, the first driving switch 51 is turned on, the second driving switch 52 is turned off, the first constant voltage input terminal 71 is electrically connected to the first electrode 11 through the first driving switch 51, and the first constant voltage input terminal 71 inputs the first voltage having a larger voltage value to the first electrode 11 through the first driving switch 51. The conduction situation in the next odd frame time is the same as the first frame time, the conduction situation in the even frame time is the same as the second frame time, and so on.

Alternatively, referring to fig. 3 and 5, the first driving chip 61 is electrically connected to each of the second data signal lines 32, the first gate lines 21 and the second gate lines 22; the first constant voltage input terminal 71 is electrically connected to each first data signal line 31. Alternatively, in some other embodiments of the present invention, the first gate line 21 and the second gate line 22 may be connected to the first driving chip 61 through a first gate driving circuit and a second gate driving circuit; between the second data signal line 32 and the first driver chip 61, a multiplexer and the like may be provided.

Specifically, with continuing reference to fig. 3 and fig. 5, the second data signal line 32, the first gate line 21, and the second gate line 22 in the embodiment of the present application are all electrically connected to the first driving chip 61, the first driving chip 61 controls the on/off of the first driving switch 51 and the second driving switch 52 through the first gate line 21 and the second gate line 22, and when the first driving switch 51 is turned on, a first voltage with a larger voltage value is input to the first electrode 11 through the first data signal line 31, and each of the second data signal lines 32 is electrically connected to the first driving chip 61, and when the second driving switch 52 is turned on, the first driving chip 61 inputs a second voltage with a smaller voltage value to the first electrode 11 through the second data signal line 32. In this way, in two adjacent frame times, the first driving chip 61 and the first constant voltage input terminal 71 alternately input the second voltage and the first voltage to the first electrode 11, and the input first voltage can be set to be larger, so as to increase the driving voltage between the first electrode 11 and the second electrode 12, improve the transmittance of the display panel 100, and further improve the display effect of the display panel 100.

Optionally, with continued reference to fig. 4 and fig. 6, in the embodiment of the present application, the third driving switches 53 and the fourth driving switches 54 are respectively arranged on the second substrate 20 in an array;

the second substrate 20 includes a plurality of third gate lines 23 and fourth gate lines 24 arranged in the first direction and extending in the second direction, a plurality of third data signal lines 33 and fourth data signal lines 34 extending in the first direction and arranged in the second direction, the third gate lines 23 and the fourth gate lines 24 are alternately arranged, and the third data signal lines 33 and the fourth data signal lines 34 are alternately arranged;

the gates of the third driving switches 53 in the same row are connected to the same third gate line 23, the sources of the third driving switches 53 in the same column are connected to the same third data signal line 33, and the drains of the third driving switches 53 are respectively coupled to the second electrodes 12 in a one-to-one correspondence; the gates of the fourth driving switches 54 in the same row are connected to the same fourth gate line 24, the sources of the fourth driving switches 54 in the same column are connected to the same fourth data signal line 34, and the drains of the fourth driving switches 54 are respectively coupled to the second electrodes 12 in a one-to-one correspondence.

Specifically, referring to fig. 4 and 6, on the second substrate 20, the third gate lines 23 and the fourth gate lines 24 are disposed in parallel and alternately, the third data signal lines 33 and the fourth data signal lines 34 are disposed in parallel and alternately, the gates 531 of the third driving switches 53 located in the same row on the second substrate 20 are connected to the same third gate line 23, the gates 541 of the fourth driving switches 54 located in the same row are connected to the same fourth gate line 24, the sources 532 of the third driving switches 53 located in the same column are connected to the same third data signal line 33, the sources 542 of the fourth driving switches 54 located in the same column are connected to the same fourth data signal line 34, and the drains 533 of the third driving switches 53 and the drains 543 of the fourth driving switches 54 are respectively connected to the second electrodes 12. In this way, the third gate line 23 and the third data signal line 33 control and transmit the data signal to the third driving switch 53, and the fourth gate line 24 and the fourth data signal line 34 control and transmit the data signal to the fourth driving switch 54, so that the third driving switch 53 and the fourth driving switch 54 are alternately turned on during the nth frame and the (n + 1) th frame. In this way, in two adjacent frame times, the second driving chip 62 and the second constant voltage input terminal 72 alternately input the second voltage and the first voltage to the second electrode 12, and the input first voltage can be set to be larger, so as to increase the driving voltage between the first electrode 11 and the second electrode 12, improve the transmittance of the display panel 100, and further improve the display effect of the display panel 100.

It should be noted that, in the embodiment shown in fig. 4, the fourth data signal lines 34 are all connected to the second driving chip 62, as shown in fig. 6, the second driving chip 62 includes a plurality of data output terminals, each data output terminal is connected to one fourth data signal line 34, the data output terminal and the second constant voltage input terminal 72 on the second driving chip 62 are alternately coupled to the fourth driving switch 54 and the third driving switch 53, where the alternate frequency can be set as one frame. For example, in the first frame time, the third drive switch 53 is turned on, the fourth drive switch 54 is turned off, the second constant voltage input terminal 72 is electrically connected to the second electrode 12 through the third drive switch 53, and the second constant voltage input terminal 72 inputs the first voltage having a larger voltage value to the second electrode 12 through the third drive switch 53; in the second frame time, the third driving switch 53 is turned off, the fourth driving switch 54 is turned on, the data output terminal of the second driving chip 62 is electrically connected to the second electrode 12 through the fourth driving switch 54, and the second driving chip 62 inputs the second voltage with a smaller voltage value to the second electrode 12 through the fourth driving switch 54. The conduction situation in the next odd frame time is the same as the first frame time, the conduction situation in the even frame time is the same as the second frame time, and so on. The first substrate 10 and the second substrate 20 are matched with each other, one of the first electrode 11 and the second electrode 12 receives a first voltage and the other receives a second voltage within each frame time, the driving voltage between the first electrode 11 and the second electrode 12 is determined by the difference between the first voltage and the second voltage, and the driving voltage between the first electrode 11 and the second electrode 12 is increased by the design because the first voltage is a constant voltage with a larger voltage value and is input by the first constant voltage input end 71 or the second constant voltage input end 72, so that the transmittance of the display panel 100 is increased, and the display effect of the display panel 100 is improved.

Alternatively, referring to fig. 4 and 6, the second driving chip 62 is electrically connected to each of the fourth data signal line 34, the third gate line 23 and the fourth gate line 24; the second constant voltage input terminal 72 is electrically connected to each of the third data signal lines 33. Alternatively, in some other embodiments of the present invention, the third gate line 23 and the fourth gate line 24 may be connected to the second driving chip 62 through a third gate driving circuit and a fourth gate driving circuit; a multiplexer and the like may be provided between the fourth data signal line 34 and the second driving chip 62.

Specifically, with continuing reference to fig. 4 and fig. 6, in the embodiment of the present application, the fourth data signal line 34, the third gate line 23 and the fourth gate line 24 are all electrically connected to the second driving chip 62, the second driving chip 62 controls the third driving switch 53 and the fourth driving switch 54 to be turned on or off through the third gate line 23 and the fourth gate line 24, and when the fourth driving switch 54 is turned on, a second voltage with a smaller voltage value is input to the second electrode 12 through the fourth data signal line 34, and each third data signal line 33 is respectively electrically connected to the second constant voltage input terminal 72, and when the third driving switch 53 is turned on, the second constant voltage input terminal 72 inputs a first voltage with a larger voltage value to the second electrode 12 through the third data signal line 33. In this way, in two adjacent frame times, the second driving chip 62 and the second constant voltage input terminal 72 alternately input the second voltage and the first voltage to the second electrode 12, and the input first voltage can be set to be larger, so as to increase the driving voltage between the second electrode 12 and the second electrode 12, improve the transmittance of the display panel 100, and further improve the display effect of the display panel 100.

Alternatively, referring to fig. 5 and 6, the first driving chip 61 and the second driving chip 62 in the embodiment of the present application are the same.

Specifically, in the embodiment of the present invention, the first driving chip 61 on the first substrate 10 and the second driving chip 62 on the second substrate 20 are configured to be the same, which means that the integrated circuit principles of the first driving chip 61 and the second driving chip 62 are the same and the components and the connection relations of the components are also the same, and the two driving chips can be duplicated with each other, when the driving chips are produced, the driving chips can be produced according to a unified specification model, and the driving chips obtained by production can be used as both the first driving chip 61 and the second driving chip 62, so that it is not necessary to separately manufacture the first driving chip 61 and the second driving chip 62 according to different production flows, which is beneficial to saving the production flow and improving the production efficiency of the display panel 100 in the embodiment of the present invention.

Fig. 5 is a diagram illustrating a connection relationship between one sub-pixel region 40 on the first substrate and the first constant voltage input terminal 71 and the first driving chip 61 in the embodiment of the present application, wherein the sub-pixel region in fig. 5 is defined by the intersection of the second data signal line 32 and the first data signal line 31 arranged adjacently and the first gate line 21 and the second gate line 22 arranged adjacently; fig. 6 is a diagram illustrating a connection relationship between a sub-pixel region 40 and a second constant voltage input terminal 72 and a second driving chip 62 on a second substrate according to an embodiment of the present application, where the sub-pixel region in fig. 6 is defined by the intersection of adjacently arranged fourth data signal

lines

34 and 33 and adjacently arranged

third gate lines

23 and 24. And one sub-pixel region on the first substrate and one sub-pixel region on the second substrate are correspondingly arranged. Taking the embodiment shown in fig. 5 as an example, the gate electrode 511 of the first driving switch 51 is electrically connected to the first gate line 21, the source electrode 512 is electrically connected to the first constant voltage input terminal 71 through the first data signal line 31 and the first switch 91, and the drain electrode 513 is electrically connected to the first electrode 11; the gate 521 of the second driving switch 52 is electrically connected to the second gate line 22, the source 522 is electrically connected to the first driving chip 61 through the second data signal line 32 and the second switch 92, and the drain 523 is electrically connected to the first electrode 11; the gates of the first switch 91 and the second switch 92 are respectively electrically connected with the first driving chip 61, and the first driving chip 61 controls the on and off of the first switch 91 and the second switch 92; in the nth frame time, the first switch 91 is turned on, the second switch 92 is turned off, the first constant voltage input terminal 71 inputs the first voltage to the first electrode 11 through the first switch 91 and the first driving switch 51, and at the same time, in the (n + 1) th frame time, the second switch 92 is turned on, the first switch 91 is turned off, and the first driving chip 61 inputs the second voltage to the first electrode 11 through the second switch 92 and the second driving switch 52. Taking the embodiment shown in fig. 6 as an example, the gate 531 of the third driving switch 53 is electrically connected to the third gate line 23, the source 532 is coupled to the second constant voltage input terminal 72 through the third data signal line 33 and the third switch 93, and the drain 533 is electrically connected to the second electrode 12; the gate 541 of the fourth driving switch 54 is electrically connected to the fourth gate line 54, the source 542 is electrically connected to the second driving chip 62 through the fourth data signal line 34 and the fourth switch 94, and the drain 543 is electrically connected to the second electrode 12; the gates of the third switch 93 and the fourth switch 94 are respectively electrically connected with the second driving chip 62, and the second driving chip 62 controls the on and off of the third switch 93 and the fourth switch 94; during the nth frame time, the third switch 93 is turned on, the fourth switch 94 is turned off, the second constant voltage input terminal 72 inputs the first voltage to the second electrode 12 through the third switch 93 and the third driving switch 53, and at the same time, during the (n + 1) th frame time, the third switch 93 is turned off, the fourth switch 94 is turned on, and the second driving chip 62 inputs the second voltage to the second electrode 12 through the fourth switch 94 and the fourth driving switch 54.

It should be noted that fig. 5 only shows the connection relationship between the first driving chip 61 and the first constant voltage input terminal 71 and the first driving switch 51 and the second driving switch 52 in one sub-pixel region on the first substrate 10, and the connection relationship between the first driving chip 61 and the first constant voltage input terminal 71 and the first driving switch 51 and the second driving switch 52 in the other sub-pixel region on the first substrate 10 can be implemented with reference to fig. 5. Fig. 6 shows only the connection relationship of the third and fourth driving switches 53 and 54 with the second driving chip 62 and the second constant voltage input terminal 72 in one sub-pixel region on the second substrate 20, and the connection relationship of the third and fourth driving switches 53 and 54 with the second driving chip 62 and the second constant voltage input terminal 72 in the other sub-pixel region on the second substrate 20 can be performed with reference to fig. 6.

Alternatively, in two adjacent frame times, the first drive switch 51 and the second drive switch 52 alternately input the first voltage and the second voltage to the first electrode 11, and the fourth drive switch 54 and the third drive switch 53 alternately input the second voltage and the first voltage to the second electrode 12, and a voltage difference between the first voltage and the second voltage is equal to or greater than a threshold voltage of the liquid crystal layer, where the threshold voltage is a voltage at which the transmittance of the display panel 100 starts to change.

Specifically, fig. 7 is a timing diagram illustrating an operation of the display panel according to the embodiment of the present application, where V511 represents the gate voltage on the first driving switch 51, V512 is the data voltage on the first driving switch 51, V521 represents the gate voltage on the second driving switch 52, V522 represents the data voltage on the second driving switch 52, V531 represents the gate voltage on the third driving switch 53, V532 represents the data voltage on the third driving switch 53, V541 represents the gate voltage on the fourth driving switch 54, and V542 represents the data voltage on the fourth driving switch 54, in conjunction with fig. 5, 6 and 7, in the nth frame time, the second driving switch 52 and the third driving switch 53 are turned off, V521 and V531 are at a low level, the first driving switch 51 is turned on and inputs a first voltage, i.e., V512, to the first electrode 11, and the fourth driving switch 54 is turned on and inputs a second voltage, i.e., V542, to the second electrode 12; in the (n + 1) th frame time, the first driving switch 51 and the fourth driving switch 54 are turned off, V511 and V541 are at a low level, the second driving switch 52 is turned on and the second voltage V522 is inputted to the first electrode 11, and the third driving switch 53 is turned on and the first voltage V532 is inputted to the second electrode 12. In the embodiment of the present application, n is a positive integer, and n ≧ 1. In each frame time, the voltage difference between the first electrode 11 and the second electrode 12 is a voltage for driving the liquid crystal between the first substrate 10 and the second substrate 20 to deflect, and the voltage is hereinafter referred to as a driving voltage. Considering that the transmittance of the display panel 100 is related to the driving voltage, when the driving voltage is in a certain small range, the transmittance of the display panel 100 is basically kept unchanged, and when the driving voltage is increased again (i.e. the driving voltage reaches the threshold voltage), the transmittance of the display panel 100 starts to change and shows a linear increasing trend until the transmittance reaches about 90%. In the embodiment of the present application, the voltage difference between the first voltage and the second voltage is greater than or equal to the threshold voltage of the liquid crystal, that is, the driving voltage in the embodiment of the present application is greater than or equal to the voltage at which the transmittance of the display panel 100 starts to change, so that the transmittance of the display panel 100 can be effectively improved, and since the embodiment of the present application inputs a larger voltage through the constant voltage input terminal, the driving voltage in the embodiment of the present application can be further increased, the transmittance of the display panel 100 is further increased, and it is possible to make the transmittance of the display panel 100 reach about 90%, which is beneficial to improving the display effect of the display panel 100 in the embodiment of the present application.

Optionally, the first voltage in this embodiment of the application is greater than the second voltage.

Specifically, in the embodiment of the present application, the first voltage with a larger voltage value is provided by the first constant voltage input terminal 71 and the second constant voltage input terminal 72, and the second voltage with a smaller voltage value is provided by the first driving chip 61 and the second driving chip 62, so that, on the basis of not changing the existing driving chip of the display panel 100, a larger driving voltage can be provided for the deflection of the liquid crystal by introducing the first constant voltage input terminal 71 and the second constant voltage input terminal 72, which is beneficial to improving the transmittance of the display panel 100 and improving the display effect of the display panel 100.

Optionally, the first voltage is a constant voltage, and the second voltage is a data gray scale voltage that changes according to a gray scale.

Specifically, the first voltage input to the first electrode 11 and the second electrode 12 through the first constant voltage input terminal 71 and the second constant voltage input terminal 72 is a constant voltage, and the voltage is set according to the requirement of the display panel 100 for the magnitude of the driving voltage and is kept constant. The second voltage in the embodiment of the application is a data gray scale voltage that changes according to a gray scale, and when the display panel 100 needs to perform different gray scale displays, the data gray scale voltage with a smaller voltage value, that is, the magnitude of the second voltage, can be adjusted to change the magnitude of the driving voltage by adjusting the magnitude of the second voltage under the condition that the first voltage is not changed, so that the deflection degree of the liquid crystal between the first substrate 10 and the second substrate 20 is changed, and thus different gray scale displays of the display panel 100 are realized.

Alternatively, the liquid crystal layer 30 in the embodiment of the present application includes polymer stabilized cholesteric liquid crystal, polymer network liquid crystal, and polymer dispersed liquid crystal.

Specifically, the liquid crystal located between the first substrate 10 and the second substrate 20 in the embodiment of the present application may employ a liquid crystal for a conventional transparent display device, such as polymer stabilized cholesteric liquid crystal, polymer network liquid crystal, polymer dispersed liquid crystal, and the like. Fig. 8 is a graph showing the relationship between driving voltage and transmittance in three different polymer stabilized cholesteric liquid crystals provided in the present application, and it can be seen from fig. 8 that the threshold voltage of the first liquid crystal a is higher and about 36V, the threshold voltage of the second liquid crystal B is middle and about 24V, and the threshold voltage of the third liquid crystal C is minimum and about 22V. When the driving voltage is lower than the threshold voltage of the three liquid crystals in fig. 8, the transmittance of the display panel 100 is only about 10%, when the driving voltage is greater than or equal to the threshold voltage, the transmittance of the display panel 100 is significantly increased, and when the driving voltage reaches a certain value, the transmittance of the display panel 100 can reach about 90% at most. The embodiment of the application can input larger voltage to the first electrode 11 and the second electrode 12 through the first voltage input end and the second voltage input end, so that the driving voltage between the first electrode 11 and the second electrode 12 is obviously improved, thereby being beneficial to improving the penetration rate of the display panel 100 and further being beneficial to improving the display effect of the display panel 100.

Fig. 9 is another cross-sectional view of a display panel provided in an embodiment of the present application, and referring to fig. 9, a first substrate 10 includes a first base 41, and a first driving switch 51 and a second driving switch 52 are disposed on a side of the first base 41 facing a second substrate 20, the first driving switch includes a gate electrode 511, a source electrode 512, a drain electrode 513, and a semiconductor active layer 514; the second driving switch includes a gate electrode 521, a source electrode 522, a drain electrode 523, and a semiconductor active layer 524, respectively; the second substrate 20 includes a second base 42, a third driving switch 53 and a fourth driving switch 54 are disposed on a side of the second base facing the first substrate 10, the third driving switch 53 includes a gate electrode 531, a source electrode 532, a drain electrode 533 and a semiconductor active layer 534, and the fourth driving switch 54 includes a gate electrode 541, a source electrode 542, a drain electrode 543 and a semiconductor active layer 544. Wherein, the gates of the first driving switch 51 and the second driving switch 52 are located at the side of the semiconductor active layer far from the first substrate 41, and the gates of the third driving switch 53 and the fourth driving switch 54 are located at the side of the semiconductor active layer far from the second substrate 42. The first electrode 11 and the second electrode 12 are disposed to face each other, and an electric field for driving liquid crystal molecules in the liquid crystal layer to rotate is formed between the first electrode and the second electrode. The design of each driving switch in the embodiment shown in fig. 9 belongs to a top gate structure, and the driving switch adopting such a structure generally uses low-temperature polysilicon as an active layer material, so that the driving capability is stronger, the area is smaller, and the aperture opening ratio is favorably improved. Unlike the embodiment shown in fig. 9, each of the driving switches in the embodiment shown in fig. 1 adopts a bottom gate structure, the gate electrodes of the first driving switch 51 and the second driving switch 52 are located on the side of the semiconductor active layer close to the first substrate 41, the gate electrodes of the third driving switch 53 and the fourth driving switch 54 are located on the side of the semiconductor active layer close to the second substrate 42, and the bottom gate structure TFT is generally applied to an amorphous silicon or oxide semiconductor active layer, and is simpler to manufacture. The structure of the drive switch is not particularly limited in the embodiments of the present application.

Based on the same inventive concept, an embodiment of the present application further provides a display device, and fig. 10 is a schematic structural diagram of the display device provided in the embodiment of the present application, the display device 200 includes a display panel 100, where the display panel 100 is the display panel 100 provided in the embodiment of the present application. The display device 200 provided in the embodiment of the present application may be any product or component having a transparent display function, for example, a showcase for displaying, through which a customer can see goods located behind the showcase, and information related to the upper skin may be displayed on a panel of the transparent showcase. In the embodiment of the present application, reference may be made to the embodiment of the display panel 100, and repeated descriptions thereof are omitted here.

As can be seen from the above embodiments, the embodiments of the present application have the following beneficial effects:

in the display panel and the display device provided in the embodiment of the application, the first driving switch and the second driving switch in each sub-pixel region are respectively coupled to the first electrode, the third driving switch and the fourth driving switch are respectively coupled to the second electrode, the first driving chip and the first constant voltage input terminal are alternately coupled to the first driving switch and the second driving switch to alternately input different voltages to the first electrode, and the second driving chip and the second constant voltage input terminal are alternately coupled to the third driving switch and the fourth driving switch to alternately input different voltages to the second electrode. Considering that higher voltages can be respectively input to the first electrode and the second electrode through the first constant voltage input end and the second constant voltage input end, even when the voltages respectively input to the first electrode and the second electrode by the first driving chip and the second driving chip are smaller, the driving voltage between the first electrode and the second electrode can be increased, and the increase of the driving voltage between the first electrode and the second electrode is beneficial to increasing the transmittance of the display panel and the display device, and the display effect of the display panel and the display device is improved.

The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.

Claims

1. A display panel, comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate;

the display panel further comprises a first driving chip, a second driving chip, a first constant voltage input terminal and a second constant voltage input terminal, wherein the first driving chip and the first constant voltage input terminal are alternately coupled to the second driving switch and the first driving switch, the second constant voltage input terminal and the second driving chip are alternately coupled to the third driving switch and the fourth driving switch, the first driving switch and the second driving switch are alternately turned on, and the fourth driving switch and the third driving switch are alternately turned on;

2. The display panel according to claim 1, wherein the first voltage is greater than the second voltage.

3. The display panel according to claim 2, wherein the first voltage is a constant voltage, and the second voltage is a data gray scale voltage that changes according to a gray scale.

4. The display panel according to claim 1, wherein the first driving switches and the second driving switches are respectively arranged in an array on the first substrate;

5. The display panel according to claim 4,

6. The display panel according to claim 5, wherein the third driving switches and the fourth driving switches are respectively arranged in an array on the second substrate;

7. The display panel according to claim 6,

8. The display panel according to claim 7, wherein the first driver chip and the second driver chip are the same.

9. The display panel of claim 1, wherein the liquid crystal layer comprises polymer stabilized cholesteric liquid crystal, polymer network liquid crystal, polymer dispersed liquid crystal.

10. A display device comprising a display panel, wherein the display panel is the display panel according to any one of claims 1 to 9.