CN220020050U - Display panel with switchable transmission and reflection and display device - Google Patents

Abstract

The utility model discloses a display panel with switchable transmission and reflection and a display device, wherein the display panel with switchable transmission and reflection comprises a color film substrate, a transflective layer and a first liquid crystal box which are sequentially stacked from bottom to top, and the first liquid crystal box is positioned at one side of the display panel close to the external environment; the first liquid crystal box comprises a counter substrate, an array substrate arranged opposite to the counter substrate and a liquid crystal layer between the counter substrate and the array substrate, the first liquid crystal box is provided with a plurality of transparent pixel units distributed in an array, and the counter substrate is in a transparent state in a region corresponding to the transparent pixel units; the color film substrate is provided with a color resistance layer in a region corresponding to the transparent pixel unit. The color film substrate is independently arranged outside the liquid crystal box, the transparent pixel unit is adopted in the liquid crystal box, and the transflective layer is arranged between the color film substrate and the liquid crystal box, so that the display panel can display a color picture when transmitting backlight and can display a black-and-white picture when reflecting ambient light.

Description

Display panel with switchable transmission and reflection and display device

Technical Field

The present utility model relates to the field of display technologies, and in particular, to a display panel and a display device with switchable transmission and reflection.

Background

With the development of display technology, light and thin display panels are popular with consumers, especially light and thin display panels (liquid crystal display, LCD).

The conventional display panel includes a thin film transistor array Substrate (Thin Film Transistor Array Substrate, TFT Array Substrate), a color film Substrate (Color Filter Substrate, CF Substrate) and liquid crystal molecules filled between the thin film transistor array Substrate and the color film Substrate, and when the display panel works, a driving voltage is applied to the thin film transistor array Substrate and the color film Substrate respectively, so as to control the rotation direction of the liquid crystal molecules between the two substrates, and refract backlight provided by a backlight module of the display panel, thereby displaying a picture.

However, the existing display panel needs the backlight module to provide a backlight source, when the ambient light is brighter, the picture displayed by the display panel is hard to be seen clearly, and the power consumption of the backlight module is higher, so that the electronic paper display becomes a display meeting the public demand, and the electronic paper display can display images by using an external light source, unlike the liquid crystal display which needs to add the backlight source, so that the information on the electronic paper can still be seen clearly in the outdoor strong sunlight environment without the problem of visual angle, and the electronic paper display is widely applied to electronic readers (such as electronic books, electronic newspapers) or other electronic components (such as price tags) because of the advantages of power saving, high reflectivity, contrast ratio and the like. However, electronic paper displays cannot be normally implemented when the ambient light is dark.

The display panel can only provide a backlight source by means of the backlight module, the electronic paper display can only provide a light source by means of ambient light, and after the display panel and the electronic paper display are manufactured, only a color picture or a black-and-white picture can be displayed. Therefore, the display panel in the prior art cannot be arbitrarily switched between the transmissive backlight display and the reflective ambient light display, and cannot display a color picture in the transmissive mode and a black-and-white picture in the reflective mode.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the utility model aims to provide a display panel with switchable transmission and reflection and a display device, so as to solve the problem that the display panel in the prior art cannot display a color picture in transmission and a black-and-white picture in reflection.

The aim of the utility model is achieved by the following technical scheme:

the utility model provides a display panel with switchable transmission and reflection, which comprises a color film substrate, a transflective layer and a first liquid crystal box, wherein the color film substrate, the transflective layer and the first liquid crystal box are sequentially laminated from bottom to top;

the first liquid crystal box comprises a counter substrate, an array substrate arranged opposite to the counter substrate and a liquid crystal layer arranged between the counter substrate and the array substrate, the first liquid crystal box is provided with a plurality of transparent pixel units distributed in an array, and the counter substrate is in a transparent state in a region corresponding to the transparent pixel units;

and the color film substrate is provided with a color resistance layer in a region corresponding to the transparent pixel unit.

Further, the display panel further comprises a second liquid crystal box, wherein the second liquid crystal box is arranged between the first liquid crystal box and the transflective layer;

the second liquid crystal box comprises a first substrate, a second substrate opposite to the first substrate and a polymer dispersed liquid crystal layer arranged between the first substrate and the second substrate, wherein a first electrode is arranged on the first substrate, and a second electrode matched with the first electrode is arranged on the second substrate.

Further, a plurality of scanning lines and a plurality of data lines are arranged on the array substrate, the scanning lines and the data lines are mutually insulated and crossed to define a plurality of transparent pixel units, a pixel electrode and a thin film transistor are arranged in each transparent pixel unit of the array substrate, and the pixel electrode is electrically connected with the scanning lines and the data lines adjacent to the thin film transistor through the thin film transistor.

Further, a common electrode matched with the pixel electrode is also arranged on the array substrate;

alternatively, a common electrode is provided on the counter substrate to be matched with the pixel electrode.

Further, a black matrix is disposed on the opposite substrate, and a projection of the black matrix on the array substrate covers the scan line, the data line and the thin film transistor.

Further, a first polaroid is arranged on the array substrate, a second polaroid is arranged on the opposite substrate, and the light transmission axis of the first polaroid is perpendicular to the light transmission axis of the second polaroid.

Further, the opposite substrate is positioned at one side of the first liquid crystal box close to the external environment, and the array substrate is positioned at one side of the first liquid crystal box close to the transflective layer;

or the array substrate is positioned on one side of the first liquid crystal box close to the external environment, and the opposite substrate is positioned on one side of the first liquid crystal box close to the transflective layer.

Further, the color resistance layer comprises a red color resistance layer, a green color resistance layer and a blue color resistance layer, and the color resistance layers of two adjacent colors are partially overlapped.

Further, the transflective layer is a unidirectional perspective film;

alternatively, the transflective layer includes a reflective polarizer and a quarter-glass slide, the quarter-glass slide is located at a side of the reflective polarizer facing the first liquid crystal cell, and a speed axis of the quarter-glass slide is 45 ° with a transmission axis and a reflection axis of the reflective polarizer.

The utility model also provides a display device with switchable transmission and reflection, which comprises a backlight module and the display panel with switchable transmission and reflection, wherein the backlight module is positioned on one side of the display panel, which is close to the color film substrate.

The utility model has the beneficial effects that: the color film substrate is independently arranged outside the liquid crystal box, the transparent pixel unit is adopted in the liquid crystal box, and the transflective layer is arranged between the color film substrate and the liquid crystal box, so that the display panel can display a color picture when transmitting backlight and can display a black-and-white picture when reflecting ambient light. When the ambient light is brighter, the display panel can be used as an electronic book to display black and white pictures, and when the ambient light is darker, the display panel can be used as a normal color display panel to display the color pictures, so that the function diversity of the display panel is realized, and the product competitiveness is improved.

Drawings

Fig. 1 is a schematic view of a display panel with switchable transmission and reflection in an initial state according to a first embodiment of the present utility model;

FIG. 2 is a schematic plan view of an array substrate according to a first embodiment of the present utility model;

FIG. 3 is a schematic diagram showing a structure of a transmissive and reflective switchable display panel in a color transmissive display mode according to a first embodiment of the present utility model;

FIG. 4 is a schematic diagram of a transmissive and reflective switchable display panel in a black and white reflective display mode according to a first embodiment of the present utility model;

FIG. 5 is a schematic diagram showing the structure of a transmissive and reflective switchable display panel in an initial state according to a second embodiment of the present utility model;

fig. 6 is a schematic structural diagram of a transmissive and reflective switchable display panel in an initial state according to a third embodiment of the present utility model.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model to achieve the preset purpose, the following detailed description refers to the specific implementation, structure, characteristics and effects of the transmissive and reflective switchable display panel and display device according to the present utility model with reference to the accompanying drawings and preferred embodiments, wherein:

example one

Fig. 1 is a schematic view of a display panel with switchable transmission and reflection in an initial state according to an embodiment of the utility model. Fig. 2 is a schematic plan view of an array substrate according to a first embodiment of the utility model.

As shown in fig. 1 to 2, a switchable transmissive and reflective display panel according to an embodiment of the utility model includes a color film substrate 10, a transflective layer 41, and a first liquid crystal cell 30 stacked in order from bottom to top, where the first liquid crystal cell 30 is located at a side of the display panel near an external environment, that is, the color film substrate 10, the transflective layer 41, and the first liquid crystal cell 30 are stacked in order from a backlight module 50 toward the external environment. Wherein, the side of the display panel near the external environment is defined as the upper side, and the side of the display panel near the backlight module 50 is defined as the lower side.

The first liquid crystal cell 30 includes a counter substrate 31, an array substrate 32 provided opposite to the counter substrate 31, and a liquid crystal layer 33 provided between the counter substrate 31 and the array substrate 32. In the present embodiment, the counter substrate 31 is located on the side of the first liquid crystal cell 30 close to the external environment, and the array substrate 32 is located on the side of the first liquid crystal cell 30 close to the transflective layer 41, that is, the counter substrate 31 is located on the upper side of the array substrate 32. The first liquid crystal cell 30 has a plurality of transparent pixel units SP distributed in an array, and the counter substrate 31 is transparent in a region corresponding to the transparent pixel units SP, that is, the counter substrate 31 is a normal transparent substrate, and no color resist material is provided. The first liquid crystal cell 30 is only used for controlling the brightness of the light passing through the first liquid crystal cell 30, and has no filtering effect.

The color film substrate 10 is provided with a color resist layer 11 in a region corresponding to the transparent pixel unit SP, wherein the color resist layer 11 includes a red color resist layer, a green color resist layer and a blue color resist layer, and red (R), green (G) and blue (B) sub-pixels are correspondingly formed. The subpixels of three colors of red (R), green (G), and blue (B) disposed on the color film substrate 10 are in one-to-one correspondence with the transparent pixel units SP disposed on the first liquid crystal cell 30.

In this embodiment, the transflective layer 41 has polarization effects on the transmitted and reflected light, the transflective layer 41 adopts a unidirectional perspective film, the transflective layer 41 can not only transmit the backlight emitted by the backlight module 50, but also reflect the ambient light in the external environment, the unidirectional perspective film has no polarization effect on the light, the backlight is still natural light after passing through the unidirectional perspective film, and the ambient light is also natural light after being reflected by the unidirectional perspective film. The unidirectional perspective film (also called unidirectional film, mirror film, etc.) refers to a film which is stuck on glass and can make the glass have very high reflectivity to visible light. For example, when the outside is brighter than the inside, the one-way see-through film is similar to a general mirror, and the outside is not seen, but the outside is seen clearly, and the one-way see-through film is widely used for a household glass film or an automobile glass film.

In this embodiment, as shown in fig. 1, the liquid crystal molecules in the liquid crystal layer 33 are positive liquid crystal molecules (liquid crystal molecules having positive dielectric anisotropy), and in the initial state, the positive liquid crystal molecules are aligned parallel to the counter substrate 31 and the array substrate 32, and the alignment direction of the liquid crystal layer 33 on the side close to the counter substrate 31 and the alignment direction on the side close to the array substrate 32 are parallel or antiparallel to each other. Of course, in other embodiments, negative liquid crystal molecules (liquid crystal molecules having negative dielectric anisotropy) may be used as the liquid crystal molecules in the liquid crystal layer 33.

As shown in fig. 2, the array substrate 32 is provided with a plurality of scan lines 1 and a plurality of data lines 2, the plurality of scan lines 1 and the plurality of data lines 2 are mutually insulated and crossed to define a plurality of transparent pixel units SP, the array substrate 32 is provided with pixel electrodes 322 and thin film transistors 3 in each transparent pixel unit SP, and the pixel electrodes 322 are electrically connected with the scan lines 1 and the data lines 2 adjacent to the thin film transistors 3 through the thin film transistors 3. The thin film transistor 3 includes a gate electrode, an active layer, a drain electrode, and a source electrode, the gate electrode and the scan line 1 are located on the same layer and electrically connected, the gate electrode and the active layer are isolated by a gate insulating layer, the source electrode is electrically connected with the data line 2, and the drain electrode is electrically connected with the pixel electrode 322.

In this embodiment, the array substrate 32 is provided with a common electrode 321 matched with the pixel electrode 322, and the common electrode 321 and the pixel electrode 322 are located in different layers and insulated and isolated by an insulating layer. The common electrode 321 may be located above or below the pixel electrode 322 (the common electrode 321 is shown below the pixel electrode 322 in fig. 1). In this embodiment, the common electrode 321 is a planar structure disposed on the whole surface, and the pixel electrode 322 is a slit electrode having a plurality of electrode strips in each transparent pixel unit SP to form a fringe field switching pattern (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 322 and the common electrode 321 may be located at the same layer, but they are insulated from each other, and each of the pixel electrode 322 and the common electrode 321 may include a plurality of electrode bars, and the electrode bars of the pixel electrode 322 and the electrode bars of the common electrode 321 are alternately arranged with each other to form an In-Plane Switching (IPS). Alternatively, the common electrode 321 may be disposed on the counter substrate 31 to form a TN or VA display mode, and the alignment of the liquid crystal layer 33 may be performed in accordance with the alignment of the TN or VA display mode.

Further, a black matrix 311 is disposed on the opposite substrate 31, and a projection of the black matrix 311 on the array substrate 32 covers the scan lines 1, the data lines 2, and the thin film transistors 3, that is, the black matrix 311 is disposed at a periphery of the transparent pixel unit SP. Of course, the opposite substrate 31 is also provided with the black matrix 311 in a region corresponding to the non-display region, thereby preventing light leakage in the non-display region. The projection of the black matrix 311 on the color film substrate 10 is located at the periphery of the color resistance layer 11, so as to prevent the color mixing of two adjacent color resistance layers 11. As shown in fig. 1, the counter substrate 31 is further provided with a shielding electrode layer 312, the shielding electrode layer 312 has a planar structure provided on the entire surface, and the shielding electrode layer 312 can shield the interference of an external electric field on the liquid crystal layer 33.

In this embodiment, the first polarizer 42 is disposed on the array substrate 32, the second polarizer 43 is disposed on the opposite substrate 31, and the transmission axis of the first polarizer 42 is perpendicular to the transmission axis of the second polarizer 43. Of course, in other embodiments, the liquid crystal layer 33 may also be a dye liquid crystal, which has the characteristics of strong light absorption capability of the long axis and weak light absorption capability of the short axis, so that the first polarizer 42 and the second polarizer 43 may not be required.

In this embodiment, as shown in fig. 1, the display panel further includes a second liquid crystal cell 20, and the second liquid crystal cell 20 is disposed between the first liquid crystal cell 30 and the transflective layer 41. The second liquid crystal cell 20 includes a first substrate 21, a second substrate 23 disposed opposite to the first substrate 21, and a polymer dispersed liquid crystal layer 22 (PDLC layer) disposed between the first substrate 21 and the second substrate 23, the first substrate 21 having a first electrode 211 thereon, and the second substrate 23 having a second electrode 231 thereon mated with the first electrode 211. Wherein the polymer dispersed liquid crystal can be switched between a haze state and a transparent state, when no voltage is applied to the first electrode 211 and the second electrode 231, the polymer dispersed liquid crystal layer 22 is in the haze state, and when a large voltage is applied to the first electrode 211 and the second electrode 231, the polymer dispersed liquid crystal layer 22 is in the transparent state. In addition, the second liquid crystal cell 20 may be replaced with a PNLC (polymer network liquid crystal) or PSCT (polymer stabilized cholesteric phase) with adjustable haze.

The color film substrate 10, the first substrate 21, the second substrate 23, the opposite substrate 31, and the array substrate 32 may be made of glass, acrylic, polycarbonate, or the like. The materials of the first electrode 211, the second electrode 231, the common electrode 321, and the pixel electrode 322 may be transparent materials such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).

Fig. 3 is a schematic structural diagram of a transmissive and reflective switchable display panel in a color transmissive display mode according to a first embodiment of the present utility model. As shown in fig. 3, in the color transmission display mode, the backlight module 50 is turned on, the backlight module 50 provides backlight for the display panel, the backlight passes through the color filter substrate 10 to display color light, and the transparent pixel units SP in the first liquid crystal cell 30 are driven to control the corresponding gray scale brightness, so that the display panel realizes color display in the transmission backlight. Of course, in the color transmissive display mode, the transflective layer 41 also reflects some ambient light, but the reflected ambient light is much less than the brightness of the transmitted backlight, and therefore, substantially no reflected ambient light is seen.

Specifically, in the color transmissive display mode, a common voltage is applied to the common electrode 321, a corresponding gray scale voltage is applied to the pixel electrode 322, a voltage difference is formed between the pixel electrode 322 and the common electrode 321 and a horizontal electric field (E1 in fig. 3) is generated, and the positive liquid crystal molecules corresponding to the transparent pixel unit SP are deflected in a horizontal direction toward a direction parallel to the horizontal electric field. The gray scale voltages include 0 to 255 gray scale voltages, and when different gray scale voltages are applied to the pixel electrode 322, the transparent pixel unit SP is made to exhibit different brightness, so that different color pictures are displayed, and normal color display is realized.

In the color transmissive display mode, the second liquid crystal cell 20 is driven to exhibit a corresponding haze to control a viewing angle range of a wide viewing angle. Specifically, as shown in fig. 3, when the display panel is in the minimum wide viewing angle range, a voltage having a large voltage difference (for example, a voltage difference of 15V) is applied to the first electrode 211 and the second electrode 231, a strong vertical electric field (E2 in fig. 3) is formed between the first electrode 211 and the second electrode 231, the polymer dispersed liquid crystal layer 22 between the first electrode 211 and the second electrode 231 is in a transparent state, at this time, the second liquid crystal cell 20 has no influence on the viewing angle range of the display panel, and the display panel exhibits the initial wide viewing angle effect. When the display panel is in the maximum viewing angle range, no voltage is applied to the first electrode 211 and the second electrode 231, no vertical electric field is generated between the first electrode 211 and the second electrode 231, and the polymer dispersed liquid crystal layer 22 between the first electrode 211 and the second electrode 231 is in an initial fog state, at this time, the light emitted from the first liquid crystal cell 30 is scattered by the second liquid crystal cell 20, so that the viewing angle range of the display panel is increased, that is, the wide viewing angle effect of the display panel is increased, and the viewing angle range of the wide viewing angle is wider. Among them, the viewing angle range of the wide viewing angle can be adjusted by controlling the pressure difference between the first electrode 211 and the second electrode 231 such that the polymer dispersed liquid crystal layer 22 exhibits a corresponding haze.

Fig. 4 is a schematic structural diagram of a transmissive and reflective switchable display panel in a black and white reflective display mode according to a first embodiment of the present utility model. As shown in fig. 4, in the black-and-white reflective display mode, the backlight module 50 is turned off, the light source is provided for the display panel by completely passing through the ambient light reflected by the transparent reflective layer 41, and the transparent pixel unit SP in the first liquid crystal cell 30 is driven to control the corresponding gray-scale brightness, so that the display panel realizes black-and-white display when the ambient light is reflected. Since the transflective layer 41 is disposed on the side of the color film substrate 10 near the first liquid crystal cell 30, the reflected ambient light does not pass through the filtering effect of the color film substrate 10, so that the display panel displays black and white.

Specifically, in the black and white reflective display mode, a common voltage is applied to the common electrode 321, a corresponding gray scale voltage is applied to the pixel electrode 322, a voltage difference is formed between the pixel electrode 322 and the common electrode 321 and a horizontal electric field (E1 in fig. 4) is generated, and the positive liquid crystal molecules corresponding to the transparent pixel unit SP are deflected in the horizontal direction toward a direction parallel to the horizontal electric field. The gray scale voltages include 0 to 255 gray scale voltages, and when different gray scale voltages are applied to the pixel electrode 322, the transparent pixel unit SP presents different brightness, so that different black and white pictures are displayed, and black and white display of reflected ambient light is realized.

In the black and white reflective display mode, the second liquid crystal cell 20 is driven to exhibit a corresponding haze to control the diffuse reflection effect. Specifically, in the display panel, when a voltage with a large voltage difference (for example, a voltage difference of 15V) is applied to the first electrode 211 and the second electrode 231 during specular reflection, a strong vertical electric field is formed between the first electrode 211 and the second electrode 231, and the polymer dispersed liquid crystal layer 22 between the first electrode 211 and the second electrode 231 is in a transparent state, so that the display panel exhibits a display effect of specular reflection. As shown in fig. 4, in the display panel, when no voltage is applied to the first electrode 211 and the second electrode 231 during diffuse reflection, no vertical electric field is applied between the first electrode 211 and the second electrode 231, the polymer dispersed liquid crystal layer 22 between the first electrode 211 and the second electrode 231 is in an initial fog state, and at this time, the light reflected by the transflective layer 41 is scattered by the second liquid crystal cell 20, and the display panel exhibits a diffuse reflection display effect. The black-and-white picture is displayed, so that the diffuse reflection effect can enable the display panel to display white background and black characters, the display effect is clearer, and the display effect of the black-and-white reflection display mode is improved. Of course, the user can adjust the diffuse reflection effect by controlling the pressure difference between the first electrode 211 and the second electrode 231 such that the polymer dispersed liquid crystal layer 22 exhibits a corresponding haze.

Example two

Fig. 5 is a schematic structural diagram of a transmissive and reflective switchable display panel in an initial state according to a second embodiment of the present utility model. As shown in fig. 5, the transmissive and reflective switchable display panel provided in the second embodiment of the present utility model is substantially the same as that in the first embodiment (fig. 1 to 4), except that in the present embodiment, the array substrate 32 is located at a side of the first liquid crystal cell 30 close to the external environment, and the opposite substrate 31 is located at a side of the first liquid crystal cell 30 close to the transflective layer 41, that is, the opposite substrate 31 is located at a lower side of the array substrate 32.

Further, the color resistance layers 11 of two adjacent colors on the color film substrate 10 are partially overlapped, and the overlapped parts between the color resistance layers 11 of two colors can be overlapped with a black matrix, so that light leakage in two adjacent transparent pixel units SP is avoided, and the problem of color mixing is reduced. Of course, in other embodiments, a black matrix may be directly disposed on the color film substrate 10, where the black matrix separates the color resists 11 of two adjacent colors from each other.

Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.

Example III

Fig. 6 is a schematic structural diagram of a transmissive and reflective switchable display panel in an initial state according to a third embodiment of the present utility model. As shown in fig. 6, the transmissive and reflective switchable display panel provided in the third embodiment of the present utility model is substantially the same as the transmissive and reflective switchable display panel in the first embodiment (fig. 1 to 4) and the second embodiment (fig. 5), except that in the present embodiment:

the transflective layer 41 includes a reflective polarizer 411 and a quarter glass slide 412, the quarter glass slide 412 is positioned at a side of the reflective polarizer 411 facing the first liquid crystal cell 30, and a speed axis of the quarter glass slide 412 is 45 ° to a light transmission axis and a light reflection axis of the reflective polarizer 411. Among them, the reflective polarizer 411 is also called reflective polarized ultrathin optical film (APF, advanced Polarizer Film), and the specular reflectance (SCI) thereof can reach more than 46%. However, the APF film has a polarizing effect on the transmitted and reflected light, and the APF film has a light transmission axis and a light reflection axis, and the light transmission axis and the light reflection axis are perpendicular to each other, and therefore, in order that the first liquid crystal cell 30 can control gray scale in both the color transmission display mode and the black and white reflection display mode, it is also necessary to provide a quarter glass 412 at a side of the reflective polarizer 411 facing the first liquid crystal cell 30 to convert the transmitted and reflected linearly polarized light into circularly polarized light. Of course, in other embodiments, the transflective layer 41 may also include a metal wire grid polarizer and a quarter-glass 412, where the metal wire grid polarizer is capable of transmitting light perpendicular to the wire grid and reflecting light parallel to the wire grid, i.e., by replacing the reflective polarizer 411 with the metal wire grid polarizer.

Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first and second embodiments, and will not be described herein.

The utility model also provides a display device with switchable transmission and reflection, which comprises a backlight module 50 and the display panel with switchable transmission and reflection, which is described in the above (the first embodiment, the second embodiment and the third embodiment). The backlight module 50 is located at a side of the color film substrate 10 away from the first liquid crystal cell 30, i.e. at an incident side of the display panel, and provides a backlight source for the display panel through the backlight module 50. When the display panel is in the color transmission display mode, the backlight module 50 is turned on to provide a backlight source for the display panel. In the black-and-white reflective display mode, the backlight module 50 is turned off because the display is performed by using the reflected ambient light.

In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed utility model. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.

The present utility model is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims (10)

1. The display panel with switchable transmission and reflection is characterized by comprising a color film substrate (10), a transflective layer (41) and a first liquid crystal box (30) which are sequentially stacked from bottom to top, wherein the first liquid crystal box (30) is positioned at one side of the display panel close to the external environment;

the first liquid crystal cell (30) comprises a counter substrate (31), an array substrate (32) arranged opposite to the counter substrate (31) and a liquid crystal layer (33) arranged between the counter substrate (31) and the array substrate (32), the first liquid crystal cell (30) is provided with a plurality of transparent pixel units (SP) distributed in an array, and the counter substrate (31) is in a transparent state in a region corresponding to the transparent pixel units (SP);

the color film substrate (10) is provided with a color resistance layer (11) in a region corresponding to the transparent pixel unit (SP).

2. The transmissive and reflective switchable display panel according to claim 1, characterized in that the display panel further comprises a second liquid crystal cell (20), the second liquid crystal cell (20) being arranged between the first liquid crystal cell (30) and the transflective layer (41);

the second liquid crystal box (20) comprises a first substrate (21), a second substrate (23) which is arranged opposite to the first substrate (21) and a polymer dispersed liquid crystal layer (22) which is arranged between the first substrate (21) and the second substrate (23), a first electrode (211) is arranged on the first substrate (21), and a second electrode (231) which is matched with the first electrode (211) is arranged on the second substrate (23).

3. The transmissive and reflective switchable display panel according to claim 1, wherein a plurality of scan lines (1) and a plurality of data lines (2) are disposed on the array substrate (32), the plurality of scan lines (1) and the plurality of data lines (2) are mutually insulated and cross to define a plurality of transparent pixel units (SP), the array substrate (32) is provided with a pixel electrode (322) and a thin film transistor (3) in each transparent pixel unit (SP), and the pixel electrode (322) is electrically connected with the scan lines (1) and the data lines (2) adjacent to the thin film transistor (3) through the thin film transistor (3).

4. A transmissive and reflective switchable display panel according to claim 3, characterized in that the array substrate (32) is further provided with a common electrode (321) cooperating with the pixel electrode (322);

alternatively, a common electrode 321 is provided on the counter substrate 31 so as to be matched with the pixel electrode 322.

5. A transmissive and reflective switchable display panel according to claim 3, characterized in that a black matrix (311) is provided on the counter substrate (31), the projection of the black matrix (311) on the array substrate (32) covering the scan lines (1), the data lines (2) and the thin film transistors (3).

6. The transmissive and reflective switchable display panel according to any of claims 1-5, wherein a first polarizer (42) is provided on the array substrate (32), and a second polarizer (43) is provided on the opposite substrate (31), and a light transmission axis of the first polarizer (42) is perpendicular to a light transmission axis of the second polarizer (43).

7. A transmissive and reflective switchable display panel according to any of claims 1-5, characterized in that the counter substrate (31) is located on the side of the first liquid crystal cell (30) close to the external environment, and the array substrate (32) is located on the side of the first liquid crystal cell (30) close to the transflective layer (41);

alternatively, the array substrate (32) is positioned on a side of the first liquid crystal cell (30) close to the external environment, and the opposite substrate (31) is positioned on a side of the first liquid crystal cell (30) close to the transflective layer (41).

8. A transmissive and reflective switchable display panel according to any of claims 1-5, characterized in that the color barrier layer (11) comprises a red color barrier layer, a green color barrier layer and a blue color barrier layer, the color barrier layers (11) of adjacent two colors being partially overlapping.

9. The transmissive and reflective switchable display panel according to any of claims 1-5, characterized in that the transflective layer (41) is a unidirectional see-through film;

alternatively, the transflective layer (41) includes a reflective polarizer (411) and a quarter glass slide (412), the quarter glass slide (412) is located at one side of the reflective polarizer (411) facing the first liquid crystal cell (30), and a speed axis of the quarter glass slide (412) is 45 ° with a light transmission axis and a light reflection axis of the reflective polarizer (411).

10. A transmissive and reflective switchable display device comprising a backlight module (50) and a transmissive and reflective switchable display panel according to any of claims 1-9, the backlight module (50) being located at a side of the display panel adjacent to the color film substrate (10).