CN109491134B

CN109491134B - Display device

Info

Publication number: CN109491134B
Application number: CN201811615527.XA
Authority: CN
Inventors: 成刚; 罗帮虎; 周森
Original assignee: Tianma Microelectronics Co Ltd
Current assignee: Tianma Microelectronics Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2021-11-16
Anticipated expiration: 2038-12-27
Also published as: CN109491134A

Abstract

The invention discloses a display device, and relates to the technical field of display. In the embodiment of the invention, the first display panel and the second display panel are arranged, so that the first display area on the second display panel can transmit the color image displayed by the first display panel, and the second area on the second display panel can display the gray image or the color image, and further, when the display device is used as a vehicle-mounted instrument display, the vehicle-mounted instrument display can display the color image and the gray image, so that the images displayed by the vehicle-mounted instrument display are richer, and meanwhile, the design flexibility of the vehicle-mounted instrument display can be greatly improved.

Description

Display device

Technical Field

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

Background

With the development of display technology, liquid crystal displays are applied to various aspects in life, such as vehicle-mounted displays, which can provide various vehicle-mounted information, and greatly improve the driving experience of drivers. However, for the vehicle-mounted instrument, a mechanical instrument panel is generally adopted at present, so that the content displayed by the vehicle-mounted instrument is limited and not rich enough. Therefore, how to make the vehicle-mounted instrument display richer and the design more flexible is a technical problem to be solved urgently by technical personnel in the field.

Disclosure of Invention

The embodiment of the invention provides a display device, which is used for enabling a vehicle-mounted instrument to be richer in display and more flexible in design.

An embodiment of the present invention provides a display device, including:

the display panel comprises a first display panel for color display and a second display panel positioned on a light-emitting surface of the first display panel, wherein the second display panel is a liquid crystal display panel;

the second display panel includes: a first display area and a second display area, an orthographic projection of the first display panel on the second display panel completely overlapping the first display area;

the second display panel controls the first display area to transmit the color image displayed by the first display panel, and the second display area of the second display panel displays a gray scale image or a color image.

The invention has the following beneficial effects:

according to the display device provided by the embodiment of the invention, the first display area on the second display panel can penetrate through the color image displayed by the first display panel through the arrangement of the first display panel and the second display panel, the second area on the second display panel can display the gray image or the color image, and further, when the display device is used as a vehicle-mounted instrument display, the vehicle-mounted instrument display can display the color image and can also display the gray image, so that the image displayed by the vehicle-mounted instrument display is richer, and meanwhile, the design flexibility of the vehicle-mounted instrument display can be greatly improved.

Drawings

Fig. 1 is a schematic structural diagram of a display device according to an embodiment of the present invention;

FIG. 2 is a sectional view taken along the direction m-m' in FIG. 1;

FIG. 3 is a cross-sectional view of another configuration shown along the direction m-m' in FIG. 1;

fig. 4 is a schematic structural diagram of a third display device provided in the embodiment of the present invention;

fig. 5 is a schematic structural diagram of a first arrangement manner of pixel units in a first display area and a second display area in a second display panel according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a second arrangement manner of pixel units in a first display area and a second display area in a second display panel according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a third arrangement manner of pixel units in the first display area and the second display area in the second display panel according to the embodiment of the present invention;

fig. 8 is a schematic view of the deflection angles of the liquid crystal molecules in the first display region and the second display region in the second display panel provided in the embodiment of the present invention;

fig. 9 is a schematic partial structure diagram of a pixel unit located in a first display region of a second display panel according to an embodiment of the present invention;

fig. 10 is a schematic partial structure diagram of a pixel unit located in a second display region of a second display panel according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a fourth arrangement manner of pixel units in the first display area and the second display area in the second display panel according to the embodiment of the present invention;

fig. 12 is a schematic view of a data line and a gate line structure located at the periphery of a via hole according to an embodiment of the present invention.

Detailed Description

A detailed description of an embodiment of a display device according to an embodiment of the present invention will be given below with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The inventor finds in research that in order to make the content displayed by the vehicle instrument panel richer, the liquid crystal display is used for replacing the mechanical instrument panel, so that more content can be provided for the vehicle instrument display.

However, there are two main designs for on-board instrument displays at present:

one is to set the vehicle-mounted instrument display to be in pure black and white display, that is, to display only some simple icons, so that the content displayed by the vehicle-mounted instrument display is relatively limited, a complex image cannot be displayed, and the displayed content is monotonous.

The other method is to set the vehicle-mounted instrument display to be color display, so that although richer contents such as road condition information or head images of both parties of a call can be displayed, the manufacturing cost of the color display screen is much higher than that of the black and white display screen, and the manufacturing process of the color display screen is more complex, so that the manufacturing cost of the vehicle-mounted instrument display is higher.

Based on this, the embodiment of the invention provides a display device, which is used for reducing the manufacturing cost while enabling a vehicle-mounted instrument display to display richer contents.

Specifically, the display device according to the embodiment of the present invention is shown in fig. 1 to 3, where fig. 1 is a top view of the display device, fig. 2 is a cross-sectional view taken along a direction m-m 'in fig. 1, and fig. 3 is a cross-sectional view of another structure taken along the direction m-m'. The display device may include: a first display panel 10 (such as a diagonal filled area) for performing color display (for avoiding misunderstanding, no reference numeral 10 is shown in fig. 1), and a second display panel 20 located on a light-emitting surface of the first display panel 10, wherein the second display panel 20 is a liquid crystal display panel;

the second display panel 20 includes: a first display area 21 (e.g., a sparse black dot filled area) and a second display area 22 (e.g., a white filled area), the orthographic projection of the first display panel 10 on the second display panel 20 completely overlapping the first display area 21;

the second display panel 20 controls the first display region 21 to display a color image through the first display panel 10, and the second display region 22 of the second display panel 20 displays a gray scale image or a color image.

It should be noted that, in the embodiment of the present invention, the second display panel 20 may control the color image displayed by the first display panel 10 through the first display region 21, and may also control the color image displayed by the first display panel 10 not through the first display region 21 (see the following description specifically), and therefore, the first display region 21 may be understood as a switch display region, and may control whether to transmit the color image displayed by the first display panel 10.

For the second area on the second display panel 20, a gray scale image or a color image can be autonomously displayed, unlike the image displayed through the first display panel 10 as in the first display area 21, that is, the principle of displaying images of the first display area 21 and the second display area 22 of the second display panel 20 is fundamentally different.

Therefore, when the display device provided by the embodiment of the invention is used as a vehicle-mounted instrument display, the vehicle-mounted instrument display can display color images and gray images, so that the images displayed by the vehicle-mounted instrument display are richer, the manufacturing cost of the vehicle-mounted instrument display can be greatly reduced, and the design flexibility of the vehicle-mounted instrument display is improved.

In practical implementation, since the second display panel 20 is a liquid crystal display panel, in order to enable the second display region 22 to display an image, in an embodiment of the present invention, as shown in fig. 4, the display device further includes: the backlight module 30 (e.g., the area filled with the vertical lines) is located on a side away from the light-emitting surface of the second display panel 20, and an orthographic projection of the backlight module 30 on the second display panel 20 is overlapped with the second display area 22; at this time, the backlight module 30 may provide a backlight source for the second display area 22 of the second display panel 20 to ensure that the second display area 22 can normally display images.

Specifically, in the embodiment of the present invention, as for the first display panel 10, a liquid crystal display panel or an electroluminescence display panel may be provided. When the first display panel 10 is a liquid crystal display panel, since the liquid crystal display panel cannot emit light, and a backlight source is needed to realize a display function, a backlight module 30 is further needed, and the backlight module 30 is disposed on a side of the first display panel 10 away from the second display panel 20, as shown in fig. 3.

When the first display panel 10 is an electroluminescent display panel (such as an OLED display panel), since the light emitting principle of the liquid crystal display panel is different from that of the electroluminescent display panel, that is, the electroluminescent display panel is a self-luminous device and does not need a backlight source to realize a display function, the backlight module 30 is not needed, as shown in fig. 4, the thickness of the first display panel 10 can be made smaller, and the whole display device has the characteristic of small thickness.

In addition, in the embodiment of the present invention, the first display panel 10 and the second display panel 20 may be attached by frame attachment or full attachment, so as to avoid the problem that most of the light emitted by the first display panel 10 is lost at the gap and cannot be incident on the first display area 21 of the second display panel 20 due to the large gap between the first display panel 10 and the second display panel 20, so that the display brightness of the first display is low and the display content is unclear. Of course, in specific implementation, other attaching methods besides frame attaching or full attaching may be adopted to attach the first display panel 10 and the second display panel 20, which is not limited herein.

Moreover, when the first display panel 10 and the second display panel 20 are attached to each other, it is necessary to use glue or adhesive tape with high transparency, such as OCA optical adhesive, to avoid adverse effects on light transmitted through the first display region 21 of the second display panel 20 after the first display panel 10 and the second display panel 20 are attached to each other, so as to improve the transmittance of the first display region 21.

It should be noted that, in the embodiment of the present invention, as shown in fig. 1 to 4, the second display panel 20 may include: at least one first display area 21 and at least one second display area 22, in this case, the first display panel 10 also needs to be at least one, that is, the first display panel 10 and the first display area 21 are arranged in a one-to-one correspondence, and it is ensured that the orthographic projection of the first display panel 10 on the second display panel 20 completely overlaps with the first display area 21. So set up, can greatly increased display device show the abundant degree of content, can also improve the flexibility of design greatly.

For example, as shown in fig. 3, the second display panel 20 includes two first display regions 21 and three second display panels 20, and the first display regions 21 are located between any two second display regions 22, so that the contents displayed by the display device can be greatly enriched, and the flexibility of design can be increased.

Accordingly, since the second display panel 20 includes three second display regions 22, the number of the backlight modules 30 needs to be three, and the backlight modules 30 are disposed in one-to-one correspondence with the second display regions 22, so that the backlight modules 30 (the backlight modules 30 shown in fig. 3) can provide backlight sources for the correspondingly disposed second display regions 22, thereby ensuring normal display of the second display regions 22.

For another example, since the manufacturing cost of the first display panel 10 is high, in order to reduce the manufacturing cost, in the embodiment of the present invention, as shown in fig. 2 and 4, the second display panel 20 may include: two second display regions 22, and one first display region 21 located between the two second display regions 22; so set up, both can guarantee that display device has abundanter display content, can also reduce the cost of manufacture.

Accordingly, as shown in fig. 4, since the second display panel 20 includes two second display regions 22, the number of the backlight modules 30 needs to be two, and the backlight modules 30 and the second display regions 22 are correspondingly arranged one by one, so that the backlight modules 30 can provide backlight sources for the correspondingly arranged second display regions 22 to ensure normal display of the second display regions 22.

In practical applications, when the first display area 21 transmits a color image of the first display panel 10 and the second display area 22 displays a gray-scale image (i.e., a black-and-white image), if the display luminance of the first display area 21 is relatively high, the display luminance between the first display area 21 and the second display area 22 is relatively high, which causes a relatively large visual stimulation to a viewer and reduces the viewing experience.

Therefore, in order to avoid the occurrence of the above-described problem, in the embodiment of the present invention, the ratio of the display luminance of the first display region 21 to the second display region 22 may be set to 0.5 to 2. Therefore, the difference between the display brightness of the first display area 21 and the display brightness of the second display area 22 can be reduced, so that the display brightness between the first display area 21 and the second display area 22 is more balanced, the problem that the display brightness of the first display area 21 is high and the display brightness of the second display area 22 is low is avoided, and the visual viewing effect of the display device is improved.

Alternatively, in the embodiment of the present invention, the ratio of the display luminance of the first display region 21 to the second display region 22 may be further set to 0.8 to 1.8. Thus, the difference between the display brightness of the first display area 21 and the display brightness of the second display area 22 can be further reduced, so that the display brightness of the first display area 21 and the display brightness of the second display area 22 are more uniform, that is, the display brightness of the first display area 21 is closer to the display brightness of the second display area 22, thereby effectively avoiding visual stimulation and effectively improving the visual viewing effect of the display device.

In a specific implementation, when the second display panel 20 includes a plurality of pixel units, and a pixel electrode is disposed in each pixel unit, the second display panel 20 can control the first display area 21 to display the color image through the first display panel 10 by adjusting the voltage of the pixel electrode, and the second display area 22 of the second display panel 20 displays the grayscale image or the color image, specifically, the adjustment manner is as follows:

referring to fig. 5 to 8, wherein fig. 5 to 7 show the arrangement of the pixel units in the first display region 21 and the second display region 22, fig. 8 shows the deflection of the liquid crystal molecules 60, which is a point to illustrate, and fig. 8 only shows the deflection of the liquid crystal molecules 60 by way of example, and does not show the actual deflection angle of the liquid crystal molecules 60; for the first display area 21: at least one pixel unit P is disposed, and voltages of the pixel electrodes are the same, that is, data signals transmitted on the data lines in the first display area 21 are the same, and after the data signals transmitted on the data lines are transmitted to the pixel electrodes, the voltages of the pixel electrodes are the same.

In the second display panel 20, the voltage of the common electrode is the same at any position, and the voltage of each pixel electrode is the same, so that the voltage difference between the common electrode and the pixel electrode is the same at any position in the first display region 21, so that the deflection angles of the liquid crystal molecules 60 in the first display region 21 are the same, as shown by the dashed line frame labeled 21 in fig. 8, and the amount of light transmitted by all the liquid crystal molecules 60 in the first display region 21 is the same; and by adjusting the voltage of the pixel electrode, the first display region 21 can be made to transmit light completely, that is, all light of the color image displayed by the first display panel 10 is transmitted, so that the second display panel 20 can control the color image displayed by the first display region 21 through the first display panel 10.

Referring to fig. 5 to 8, for the second display region 22: a plurality of pixel units P are provided, in the display stage of the second display area 22, voltages of at least some of the pixel electrodes are different, that is, data signals transmitted on the data lines in the second display area 21 are at least partially different, and after the data signals transmitted on the data lines are transmitted to the pixel electrodes, the voltages of at least some of the pixel electrodes are ensured to be different.

For the second display panel 20, regardless of the position, since the voltage of the common electrode is the same, in the second display region 22, the voltage difference between at least a part of the pixel electrodes and the common electrode is different, so that the deflection angles of the liquid crystal molecules 60 at least partially located in the second display region 22 are different, as shown by the dashed line box labeled 22 in fig. 8, and further, the amount of the backlight light transmitted by at least a part of the liquid crystal molecules 60 is different, thereby being beneficial to realizing that the second display region 22 of the second display panel 20 can display a gray scale image or a color image.

Alternatively, in the embodiment of the present invention, for the first display region 21, a plurality of pixel units P may be arranged in an array, as shown in fig. 5 and fig. 6, only a part of the pixel units P is shown in fig. 6, a group of three black filled dots represents that the pixel units P not shown are omitted, dense black filled dots represent through holes T (see the following description), a pixel electrode PD is arranged in each pixel unit P, and an enlarged structural schematic diagram of one pixel unit P shown in fig. 9 is shown, in this case, for the first display region 21: the pixel electrode PD can be supplied with voltage without a switching transistor in the pixel unit P, that is, without control of the switching transistor; therefore, the gate lines 40 may be disposed in an insulated manner from the pixel electrodes PD (as shown in fig. 9), and each data line 50 may be directly electrically connected to at least one column of pixel electrodes (e.g., one data line 50 is electrically connected to one column of pixel electrodes as shown in fig. 5 and 6), that is, the data lines 50 may directly transmit data signals to the corresponding electrically connected pixel electrodes PD without passing through a switching transistor, so that while a color image displayed by the first display region 21 through the first display panel 10 is realized, the use time of transmitting data signals to the pixel electrodes may be reduced, the transmission speed of data signals is increased, and the response speed of switching control is increased when the first display region 21 is regarded as a switching display region.

It should be noted that, in the embodiment of the present invention, referring to fig. 6, the forward projection areas of the pixel units P on the second display panel 20 are all the same, and at this time, when the areas of the first display region 21 and the second display region 22 are equal, the number of the data lines 50 in the first display region 21 may be the same as the number of the data lines 50 in the second display region 22, and as shown in fig. 6, three data lines 50 are arranged in each of the first display region 21 and the second display region 22.

Of course, in the embodiment of the present invention, the length of the pixel unit P located in the first display region 21 in at least the row direction may be greater than the length of the pixel unit P located in the second display region 22 in the row direction; for example, referring to fig. 5, P1 denotes a pixel cell within the first display region 21, P2 denotes a pixel cell within the second display region 22, and the length of P1 in the row direction is significantly greater than the length of P2 in the row direction, and since the length of P1 in the column direction is equal to the length of P2 in the column direction, the area of P1 is greater than the area of P2.

At this time, referring to fig. 5, if the areas of the first display region 21 and the second display region 22 are equal, the number of data lines 50 disposed in the first display region 21 is significantly smaller than the number of data lines 50 disposed in the second display region 22, and as shown in fig. 5, 2 data lines 50 are disposed in the first display region 21 and 3 data lines 50 are disposed in the second display region 22.

That is, fewer pixel units P can be disposed in the first display area 21, that is, fewer pixel electrodes PD can be disposed in the first display area 21, so that the structure of the second display panel 20 in the first display area 21 can be greatly simplified, the manufacturing difficulty of the first display area 21 can be reduced, and the manufacturing cost of the second display panel 20 can be reduced.

In order to further simplify the structure of the second display panel 20 in the first display area 21 and reduce the manufacturing cost of the second display panel 20, optionally, in the embodiment of the present invention, for the first display area 21, only one pixel unit (e.g., a grid-shaped filling area) may be provided, that is, the first display region 21 may be regarded as a pixel unit, as shown in fig. 7, in this case, in the first display region 21, only one pixel electrode is provided, only one data line 50 may be provided in the first display region 21, and there is no need to provide a switching transistor in the pixel unit, so that the data line 50 can be directly electrically connected to the pixel electrode, and the gate line 40 is insulated from the pixel electrode, thereby, without control by a switching transistor, the data signal transmitted on the data line 50 can be transmitted to the pixel electrode, i.e. the pixel electrode is supplied with voltage through the data line 50.

That is, since only one pixel electrode is disposed in the first display region 21, it can be understood that the voltages of the pixel electrodes at the respective positions in the first display region 21 are the same, so that the liquid crystal molecules 60 in the first display region 21 have the same deflection angle, and the amount of light transmitted by the liquid crystal molecules 60 is the same, so that the first display region 21 can transmit the color image displayed by the first display panel 10.

With the arrangement, the manufacturing process of the pixel electrode in the first display area 21 is very simple, that is, the manufacturing difficulty is greatly reduced; since the first display region 21 does not need to be provided with a switching transistor, the manufacturing process of the first display region 21 can be reduced, thereby greatly reducing the manufacturing cost of the second display panel 20.

As for the second display region 22, a plurality of pixel units P are arranged in an array, as shown in fig. 5 to 7, a switching transistor TFT is arranged in each pixel unit P, as shown in an enlarged schematic view of a pixel unit in fig. 10, and a drain of the switching transistor TFT is electrically connected to the pixel electrode PD; when a plurality of data lines 50 are disposed in the second display region 22, each data line 50 is electrically connected to the source electrode of the switching transistor TFT in one column of the pixel units P, and each gate line 40 is electrically connected to the gate electrode of the switching transistor TFT in one row of the pixel units P.

That is, when the gate line 40 inputs a gate turn-on signal, the switching transistor TFT is turned on, a data signal transmitted from the data line 50 is transmitted to the pixel electrode PD, and a voltage is supplied to the pixel electrode PD, and the data signals supplied from different data lines 50 are different, so that different pixel electrodes PD have different voltages, thereby being advantageous in that the second display region 22 of the second display panel 20 can display a gray image or a color image.

Certainly, for the second display area 22, the plurality of pixel units P may not be arranged in an array, as shown in fig. 11, in the second display area 22, if information is displayed through a pointer-type dial, such as information of a rotation speed and a vehicle speed, the pixel units P may be set in a digital shape, and pixel electrodes in the pixel units P are also set in a corresponding digital shape, at this time, no gate line is needed to be set on the second display panel 20, only the data line 50 needs to be set, the data line 50 is directly electrically connected to each pixel electrode, that is, the data line 50 directly provides a data signal to the pixel electrodes, so that the structure of the second display panel 20 can be greatly simplified, and the manufacturing difficulty and the manufacturing cost of the second display panel 20 are reduced.

To explain this point, in order to be able to reduce the power consumption of the display device, the first display panel 10 may be controlled to be in a non-light emitting state at this time, that is, power supply to the first display panel 10 is stopped, so that the first display panel 10 does not display any image, so that the first display region of the second display panel 20 may autonomously display an image.

Therefore, in the embodiment of the present invention, no matter how the second display region 22 is disposed on the second display panel 20, the first display region 21 is disposed with the gate line and the data line, and is disposed with the plurality of pixel units arranged in an array, the pixel units are disposed with the pixel electrodes and the switching transistors, for each pixel unit, the gate electrode of the switching transistor is electrically connected to the gate line, the source electrode is electrically connected to the data line, and the drain electrode is electrically connected to the pixel electrode, when the gate line inputs the gate start signal, the switching transistor is turned on, and the data signal is transmitted to the pixel electrode, so that the first display region 21 can be controlled to autonomously display an image, and therefore, the first display panel 10 is not powered and does not display an image, so that the first display region 21 only displays a black-white image displayed by itself, and thus, the power consumption of the display device can be greatly reduced.

In practical implementation, in order to provide a voltage to the pixel electrode PD on the second display panel 20, it is required to implement the voltage by using a driving chip. For example, with respect to the first display region 21, since the pixel electrode PD is directly electrically connected to the data line 50 and insulated from the gate line 40, the driving chip may supply the data signal to the data line 50 located in the first display region 21 without supplying the gate-on signal to the gate line 40. For the second display region 22, since the switching transistor TFT exists in the pixel unit P, the driving chip needs to supply a gate-on signal to the gate line 40 as well as the data line 50.

Therefore, in the embodiment of the present invention, the second display panel 20 may include two mutually independent driving chips; one of the driving chips is used to provide a driving signal, such as a data signal, to the first display region 21; the other driving chip is used for the second display region 22 to provide driving signals such as a data signal and a gate-on signal. Therefore, the corresponding display areas can be controlled by the two driving chips respectively, control confusion is avoided, and control and driving accuracy is improved.

Of course, in the embodiment of the present invention, the second display panel 20 may include a driving chip, as shown in fig. 11, and the driving chip 70 is used for providing different driving signals to the first display area 21 and the second display area 22. That is, the first display region 21 and the second display region 22 are controlled and driven by one driving chip 70, so that the number of driving chips 70 disposed in the second display panel 20 can be reduced, the structure of the second display panel 20 can be simplified, and the manufacturing cost of the second display panel 20 can be reduced.

It should be noted that, since the switching transistor TFT (as shown in fig. 9) is not required to be disposed in the pixel unit P in the first display region 21, in order to reduce the structural complexity in the first display region 21 and reduce the manufacturing cost, in the embodiment of the present invention, the gate line 40 may not be disposed in the first display region 21, that is, taking the structure shown in fig. 7 as an example, the gate line 40 is disposed only in the second display region 22 and is used for providing a gate-on signal for each pixel unit P to turn on the gate of the switching transistor TFT in the pixel unit P, and transmitting the data signal transmitted on the data line 50 to the pixel electrode PD.

Therefore, the second display area 22 can be ensured to normally display images, the manufacturing cost can be reduced, and the manufacturing difficulty can be reduced; in addition, since the gate lines 40 are only disposed in the second display region 22, compared with the structure shown in fig. 6, in fig. 7, the length of the gate lines 40 on the second display panel 20 is reduced, so that the load of the gate lines 40 is reduced, the delay is reduced, the voltage drop of the gate-on signal can be greatly reduced, the accuracy of the gate-on signal is improved, and the display effect of the second display region 22 is improved.

In practical applications, when the display device provided in the embodiment of the present invention is an on-vehicle instrument display, information such as the rotation speed and the vehicle speed generally needs to be displayed, and the display of the rotation speed and the vehicle speed is more intuitive when displayed through a pointer-type dial, but in order to set the pointer, a through hole T needs to be provided in the on-vehicle instrument display, as shown in fig. 6, so as to facilitate installation of the pointer. However, if the through hole T is disposed in the second display region 22 of the second display panel 20, the presence of the through hole T may affect the disposition of the gate line 40 and the data line 50 in the second display region 22, and may further affect the signal transmission, and finally affect the display effect of the second display region 22.

Based on this, in the embodiment of the present invention, as shown in fig. 12, the through hole T in the second display region 22 and the schematic partial enlarged structure of the periphery, for the gate line 40, the gate line 40 is divided into a normal gate line 41 and an escape gate line 42, where the escape gate line 42 may include: a first connection portion 42b provided along an edge of the through hole T, and first regular portions 42a located at both sides of the through hole T and electrically connected to the first connection portion 42 b; the regular gate line 41 is disposed in parallel with the first regular portion 42 a.

For example, referring to fig. 12, for the sake of clarity, only one relief grid line (indicated by 42) and one normal grid line (indicated by 41) are shown, the via hole is indicated by T, the relief grid line 42 includes a first connection portion (indicated by 42 b) and a first normal portion (indicated by 42 a), and the first normal portion 42a extends in the row direction and the normal grid line 41 also extends in the row direction, so that the first normal portion 42a is disposed parallel to the normal grid line 41.

Therefore, the gate lines 40 in the second display region 22 can be ensured to be interrupted due to the existence of the through holes T, effective transmission of the gate start signal can be ensured, and uniform delay between the avoiding gate line 42 and the conventional gate line 41 can be ensured, so that uniform display of the second display region 22 is ensured, and the display effect of the display device is improved.

As shown in the enlarged partial structural diagram of the second display region 22 in fig. 12, for the data line 50, the data line 50 may be divided into a normal data line 51 and a back-off data line 52, where the back-off data line 52 may include: a second connection portion 52b provided along an edge of the through-hole, and second regular portions 52a located at both sides of the through-hole and electrically connected to the second connection portion 52 b; the regular data line 51 is disposed in parallel with the second regular portion 52 a.

For example, as shown in fig. 12, for the sake of clarity of illustration, only one avoidance data line (denoted by 52) and one regular data line (denoted by 51) are shown, the through hole is denoted by T, the avoidance data line 52 includes a second connection portion (denoted by 52 b), and a second regular portion (denoted by 52 a), and the second regular portion 52a extends in the row direction, and the regular data line 51 also extends in the row direction, so that the second regular portion 52a is disposed in parallel with the regular data line 51.

Thus, the disconnection of the data line 50 caused by the through hole can be avoided, and the normal transmission of the data signal to each pixel unit P can be ensured; furthermore, display unevenness due to delay unevenness caused by disconnection of the data lines 50 can be avoided, and display uniformity of the second display region 22 can be improved, thereby improving the display effect of the display device.

Alternatively, in the embodiment of the present invention, the orthographic projection shapes of the first connection portion 42b and the second connection portion 52b on the second display panel 20 may be set to be stepped (not shown) or arc-shaped (as shown in fig. 12). Of course, other shapes may be provided, which may be determined according to the shape of the through hole and the layout of the structures located at the periphery of the through hole, and is not limited herein.

In practical implementation, in the embodiment of the present invention, the second display panel 20 may mainly include, because it is a liquid crystal display panel: an upper polarizer, an opposite substrate, a liquid crystal, an array substrate, and a lower polarizer, not shown, if the second display area 22 of the second display panel 20 displays a gray image, the entire second display panel 20 does not need to have a color film layer or a structure related to color display; if the second display region 22 of the second display panel 20 displays simple color images, color ink may be coated on the side of the lower polarizer away from the array substrate, or a color film may be directly attached to the lower polarizer, so that the second display panel 20 can display color images.

Of course, the second display panel 20 may further include other structures for implementing the display function, which may be referred to in the prior art and will not be described herein again.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A display device, comprising:

the first display area is a switch display area, the second display panel controls the color image displayed by the first display area through the first display panel, and the second display area of the second display panel displays a gray scale image or a color image.

2. The display device of claim 1, wherein the display device further comprises: the backlight module is positioned on one side departing from the light-emitting surface of the second display panel, and the orthographic projection of the backlight module on the second display panel is overlapped with the second display area;

the second display panel includes: two of the second display regions, and one of the first display regions located between the two second display regions;

the number of the backlight modules is two, and the backlight modules are arranged in one-to-one correspondence with the second display areas.

3. The display device according to claim 1, wherein a ratio of display luminance of the first display region to the second display region is 0.5 to 2.

4. The display device according to claim 3, wherein a ratio of display luminance of the first display region to the second display region is 0.8 to 1.8.

5. The display device according to claim 1, wherein the second display panel includes a plurality of pixel units in which pixel electrodes are provided;

the first display area is provided with at least one pixel unit, and the voltages of the pixel electrodes are the same;

the second display area is provided with a plurality of pixel units, and at least partial voltages of the pixel electrodes are different in a display stage of the second display area.

6. The display device according to claim 5, wherein in the first display region, the pixel units are provided in plurality and arranged in an array;

the second display panel includes: a plurality of data lines arranged along a row direction and a plurality of gate lines arranged along a column direction;

for the first display area: each data line is directly and electrically connected with at least one row of pixel electrodes, and the grid lines are insulated from the pixel electrodes;

in the second display area, the pixel units are arranged in an array; the pixel unit comprises a switch transistor, and the drain electrode of the switch transistor is electrically connected with the pixel electrode; each data line is electrically connected with the source electrode of the switch transistor in one row of the pixel units, and each grid line is electrically connected with the grid electrode of the switch transistor in one row of the pixel units.

7. The display device according to claim 6, wherein an orthographic projection area of each of the pixel units on the second display panel is the same;

the areas of the first display area and the second display area are equal, and the number of the data lines in the first display area is the same as the number of the data lines in the second display area.

8. The display device according to claim 6, wherein a length of the pixel unit located in the first display region in at least a row direction is larger than a length of the pixel unit located in the second display region in the row direction;

the areas of the first display area and the second display area are equal, and the number of the data lines in the first display area is smaller than the number of the data lines in the second display area.

9. The display device according to claim 5, wherein in the first display region, one of the pixel units is provided;

the first display area is provided with one data line which is directly and electrically connected with the pixel electrode, and the grid line is insulated from the pixel electrode;

in the second display area, the pixel units are arranged in an array; the pixel unit comprises a switch transistor, and the drain electrode of the switch transistor is electrically connected with the pixel electrode; the data lines are provided with a plurality of data lines, each data line is electrically connected with the source electrodes of the switching transistors in one row of the pixel units, and each grid line is electrically connected with the grid electrodes of the switching transistors in one row of the pixel units.

10. The display device according to claim 1, wherein the second display panel includes two mutually independent driving chips; one of the driving chips is used for providing a driving signal for the first display area; and the other driving chip is used for providing a driving signal for the second display area.

11. The display device according to claim 1, wherein the second display panel includes a driving chip for providing different driving signals to the first display region and the second display region.

12. The display device according to claim 1, wherein the second display panel includes a through hole provided in the second display region;

the second display panel further includes: a plurality of data lines arranged in parallel, and a plurality of gate lines arranged in parallel;

the gate line is divided into a normal gate line and an avoidance gate line, and the avoidance gate line includes: the first connecting part is arranged along the edge of the through hole, and the first conventional parts are positioned at two sides of the through hole and are electrically connected with the first connecting part; the normal grid line is arranged in parallel with the first normal part;

the data line is divided into a normal data line and an avoidance data line, and the avoidance data line includes: the second connecting part is arranged along the edge of the through hole, and the second conventional parts are positioned on two sides of the through hole and are electrically connected with the second connecting part; the normal data line is disposed in parallel with the second normal portion.

13. The display device according to claim 12, wherein an orthogonal projection shape of the first connection portion and the second connection portion on the second display panel is a step shape or an arc shape.

14. The display device according to any one of claims 1 to 13, wherein the first display panel and the second display panel are attached by frame attachment or full attachment.

15. The display device according to any one of claims 1 to 13, wherein the first display panel is a liquid crystal display panel or an electroluminescent display panel.