CN216927313U - Display panel and display device - Google Patents

Abstract

The utility model provides a display panel and a display device, which comprise a first substrate and a second substrate which are oppositely arranged, dye liquid crystal positioned between the first substrate and the second substrate, a quantum rod film positioned on one side of the first substrate, and a reflecting layer positioned on one side of the second substrate close to the dye liquid crystal. Wherein the dye liquid crystal allows polarized light perpendicular to a long axis direction of the dye liquid crystal to transmit therethrough, and the quantum rod film converts incident light into polarized light perpendicular to the long axis direction of the dye liquid crystal. Therefore, more external incident light penetrates through the dye liquid crystal to reach the reflecting layer by the quantum rod film, and more emergent light enters human eyes, so that the absorption of the dye liquid crystal to the incident light can be reduced, and the brightness of the display panel can be improved.

Description

Display panel and display device

Technical Field

The utility model relates to the technical field of display, in particular to a display panel and a display device.

Background

Along with the popularity of online education of children, merchants have developed some education books for mainly playing energy-saving and eye-protecting effects.

The education book has the disadvantages that the brightness of the screen is seriously insufficient when the education book is displayed in a bright state, and the eyes of children are injured when the children watch the screen with low brightness for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model provides a display panel and a display device, aiming at increasing the brightness of the display panel.

In one aspect, the present invention provides a display panel, including:

the first substrate and the second substrate are oppositely arranged;

a dye liquid crystal between the first substrate and the second substrate, the dye liquid crystal allowing polarized light perpendicular to a long axis direction of the dye liquid crystal to transmit therethrough;

a quantum rod film on one side of the first substrate;

the reflecting layer is positioned on one side, close to the dye liquid crystal, of the second substrate;

wherein the quantum rod film converts incident light into polarized light perpendicular to a long axis direction of the dye liquid crystal.

Further, when the display panel is in a bright state, the long axis of the dye liquid crystal is arranged along a first direction; when the display panel is in a dark state, the long axis of the dye liquid crystal is arranged along a second direction, and the second direction is perpendicular to the first direction.

Further, the arrangement direction of the quantum rod film is perpendicular to the first direction.

Further, the first substrate includes a first side proximate to the dye liquid crystal and a second side distal from the dye liquid crystal, the quantum rod film being located at the first side of the first substrate.

Further, the display panel further includes:

a first electrode between the first substrate and the quantum rod film;

a second electrode between the second substrate and the reflective layer;

the first electrode and the second electrode control the dye liquid crystal to rotate.

Further, the incident light is incident from the first substrate, and the incident light includes natural light.

Further, the first substrate is a color film substrate, and the second substrate is an array substrate.

Further, the incident light reaches the reflective layer through the quantum rod film and the dye liquid crystal, and exits from the first substrate through the dye liquid crystal again.

Further, the dye liquid crystal is a black dye liquid crystal.

In another aspect, the present invention provides a display device including the display panel described in any one of the above.

The utility model has the beneficial effects that: the display panel comprises a first substrate, a second substrate, a dye liquid crystal, a quantum rod film and a reflecting layer, wherein the first substrate and the second substrate are arranged oppositely, the dye liquid crystal is located between the first substrate and the second substrate, the quantum rod film is located on one side of the first substrate, and the reflecting layer is located on one side, close to the dye liquid crystal, of the second substrate. Wherein the dye liquid crystal allows polarized light perpendicular to a long axis direction of the dye liquid crystal to transmit therethrough, and the quantum rod film converts incident light into polarized light perpendicular to the long axis direction of the dye liquid crystal. Therefore, more external incident light penetrates through the dye liquid crystal to reach the reflecting layer by the quantum rod film, and more emergent light enters human eyes, so that the absorption of the dye liquid crystal to the incident light can be reduced, and the brightness of the display panel can be improved.

Drawings

The technical solution and other advantages of the present invention will become apparent from the following detailed description of specific embodiments of the present invention, which is to be read in connection with the accompanying drawings.

Fig. 1 is a schematic structural diagram of a display panel in a bright state according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display panel in a dark state according to an embodiment of the present invention;

fig. 3 is another schematic structural diagram of a display panel in a bright state according to an embodiment of the present invention.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. 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.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a display panel in a bright state according to an embodiment of the present invention. Referring to fig. 2, fig. 2 is a schematic structural diagram of a display panel in a dark state according to an embodiment of the present invention. The display panel 100 may be a reflective liquid crystal display panel.

The display panel 100 includes a first substrate 10 and a second substrate 11 disposed opposite to each other, and a dye liquid crystal 12 between the first substrate 10 and the second substrate 11. In some embodiments, the first substrate 10 may be a color filter substrate, the second substrate 11 may be an array substrate, and the dye liquid crystal 12 may be a black dye liquid crystal.

The color filter substrate generally includes a substrate or a substrate, a Black Matrix (BM) formed on the substrate, and a color filter layer. Wherein the color filter layer includes a plurality of filter cells of different colors, such as red, green, and blue green cells formed using red, green, and blue photosensitive resins, respectively. The black matrix is used to define the boundary between the filter units, and in order to prevent light leakage between adjacent filter units, the edge of the filter unit is usually overlapped on the black matrix, and the filter units are not formed at the same time. Usually, the film thickness of each filter unit is not exactly the same, which easily causes the whole filter layer to be uneven, therefore, a flat layer is usually disposed on the filter layer, and spacers are disposed on the flat layer to ensure the cell thickness and shape of the liquid crystal cell. In order to perform a multi-level cushioning function to prevent various undesirable effects, more than two types of spacers are generally used, and the spacers generally include a main spacer and an auxiliary spacer.

The array substrate may include a Thin Film Transistor (TFT) array substrate, and may further include a flexible substrate (e.g., polyimide) under the TFT array substrate. The thin film transistor array substrate includes a plurality of thin film transistors, such as switching thin film transistors, photo thin film transistors, and the like. The thin film transistor may have a top gate structure or a bottom gate structure. The thin film transistor comprises a shading layer, a buffer layer, an active layer, a grid insulating layer, a grid electrode, a source electrode, a drain electrode and an interlayer dielectric layer. The buffer layer covers the shading layer, the active layer is located on the buffer layer, the grid insulating layer is located on the active layer, and the grid electrode is located on the grid insulating layer. The interlayer dielectric layer covers the active layer, the gate insulating layer and the gate electrode. The source electrode and the drain electrode are respectively positioned at two ends of the active layer.

The dye liquid crystal 12 has a major axis and a minor axis, and the dye liquid crystal 12 allows polarized light perpendicular to the major axis direction of the dye liquid crystal 12 to transmit therethrough. That is, light polarized in a direction perpendicular to the long axis of the dye liquid crystal 12 may pass through without loss, and light of other polarization directions may be absorbed by the dye liquid crystal 12. Therefore, if natural light is incident on the dye liquid crystal 12, most of the light is absorbed by the dye liquid crystal 12, and only light having a polarization direction perpendicular to the long axis of the dye liquid crystal 12 is transmitted.

In some embodiments, the dye liquid crystal 12 may be dye liquid crystal of other colors, and the first substrate 10 may be a common substrate (not including a color filter layer). The liquid crystal can produce color display after adding color dye into the liquid crystal. The dye has sufficient solubility for liquid crystal and does not affect the liquid crystal performance. The other substructures have good linearity, and can keep the oriented parallel arrangement with the liquid crystal molecules after being added into the liquid crystal, and the molecules generate the rotation with the same phase with the liquid crystal molecules under the action of an electric field. The dye not only needs to have high purity, but also needs to have high dichroism ratio (more than or equal to 10), high extinction coefficient (more than or equal to 0.3), high solubility (more than or equal to 5%), high impedance (more than or equal to 10 ohm.cm), high stability and good panchromatic property. The dyes for liquid crystal can be classified into azo dyes and anthraquinone derivatives.

The display panel 100 further includes a quantum rod film 13 disposed on one side of the first substrate 10, the first substrate 10 includes a first side 101 close to the dye liquid crystal 12 and a second side 102 far from the dye liquid crystal 12, and the quantum rod film 13 is disposed on the first side 101 of the first substrate 10, so as to prevent light from being slightly refracted when passing through the first substrate 10. The quantum rod film 13 may convert incident light into polarized light perpendicular to the long axis direction of the dye liquid crystal 12.

The display panel 100 further includes a reflective layer 14, wherein the reflective layer 14 is located on a side of the second substrate 11 close to the dye liquid crystal 12. The incident light may include natural light, among others. Arrows in fig. 1 indicate the propagation path of light, and the incident light enters from the first substrate 10, passes through the quantum rod film 13 and the dye liquid crystal 12 in sequence to reach the reflective layer 14, and exits from the first substrate 10 after being reflected again through the dye liquid crystal 12.

In some embodiments, the reflective layer 14 may include a color reflective layer, and the first substrate 10 may be a common substrate (not including a color filter layer). The color reflecting layer comprises a red reflecting layer, a blue reflecting layer and a green reflecting layer which are sequentially arranged and is used for realizing color display.

In some embodiments, when the display panel 100 is in a bright state, the long axis of the dye liquid crystal 12 is disposed along a first direction; when the display panel 100 is in a dark state, the long axis of the dye liquid crystal 12 is arranged along a second direction, and the second direction is perpendicular to the first direction. Here, the first direction may be a vertical direction, i.e., a direction perpendicular to the first and second substrates 10 and 11, and the second direction may be a horizontal direction.

In some embodiments, as shown in fig. 1, when the display panel 100 is in a bright state, the dye liquid crystal 12 is aligned in a first direction (e.g., vertical direction), the quantum rod film 13 may convert incident light into polarized light perpendicular to the long axis direction (first direction) of the dye liquid crystal 12, i.e., the quantum rod film 13 may convert incident light into polarized light in a second direction. Since the dye liquid crystal 12 may allow polarized light perpendicular to the long axis direction of the dye liquid crystal 12 to transmit therethrough, that is, the dye liquid crystal 12 may allow polarized light in the second direction to transmit therethrough, the incident light may be converted into polarized light in the second direction through the quantum rod film 13 and may transmit through the dye liquid crystal 12.

Therefore, in the structure of the display panel 100 in the bright state of the embodiment, the quantum rod film 13 can convert external incident light into polarized light that can be transmitted by the dye liquid crystal 12, so that more external incident light can reach the reflective layer 14 through the dye liquid crystal 12, and more emergent light can enter human eyes, which can reduce the absorption of the dye liquid crystal 12 on the incident light, and achieve the purpose of improving the brightness of the reflective liquid crystal display panel. The display panel which utilizes external light source reflection and does not use a backlight and a polaroid can avoid strong light from stimulating the eyes of children and save a large amount of cost. In addition, when a child wants to use the display panel 100 in a quilt, since the external light is very dark, the brightness of the display panel 100 is almost zero, and thus the child cannot use the display panel in a dark environment, which not only can protect the eyes of the child, but also can ensure the sleep of the child.

As shown in fig. 2, when the display panel 100 is in a dark state, the long axis of the dye liquid crystal 12 may be arranged along a second direction (e.g., a horizontal direction), and since incident light is converted into polarized light along the second direction after passing through the quantum rod film 13, the polarized light in the second direction cannot pass through the dye liquid crystal 12, that is, is absorbed by the dye liquid crystal 12 to present the dark state.

Quantum Dots (QD), also called micro-crystals, are composed of micro-particles with a particle size between 1-20 nm. Due to the influence of quantum confinement effect on electrons and holes, the continuous energy band structure of the quantum dots is separated into independent energy level structures, and the quantum dots can emit fluorescence after being excited. Meanwhile, the quantum dots have high light conversion efficiency, and the utilization rate of light can be improved. The Quantum rod (Quantum rob) is a two-dimensional micron material and has the dimming effect of Quantum dots, namely, the spectrum obtained by exciting the Quantum rod can be changed by adjusting the size of the Quantum rod. And the orderly arranged quantum rods can realize the polarization of light.

In one embodiment, the quantum rod films 13 are arranged in an orderly manner, for example, along the second direction, so that the incident light from the outside can be converted into polarized light having the same direction as the arrangement direction of the quantum rod films 13, that is, into polarized light along the second direction.

The display panel 100 may further include a first electrode 15 and a second electrode 16, and both the first electrode 15 and the second electrode 16 may be transparent electrodes, such as Indium Tin Oxide (ITO). In some embodiments, a first electrode 15 is located between the first substrate 10 and the quantum rod film 13. The second electrode 16 is located between the second substrate 11 and the reflective layer 14. In other embodiments, the first electrode 15 may be located on a side of the quantum rod film 13 adjacent to the dye liquid crystal 12, and the second electrode 16 may be located on a side of the reflective layer 14 adjacent to the dye liquid crystal 12. The dye liquid crystal 12 can be controlled to rotate by applying a voltage to the first electrode 15 and the second electrode 16. For example, when the display panel 100 is in a bright state, the long axis of the dye liquid crystal 12 is controlled to be arranged along a first direction; when the display panel 100 is in a dark state, the long axis of the dye liquid crystal 12 is controlled to be aligned along the second direction.

Referring to fig. 3, fig. 3 is another schematic structural diagram of a display panel in a bright state according to an embodiment of the present invention. The display panel 200 includes a first substrate 20 and a second substrate 21 disposed opposite to each other, a dye liquid crystal 22 disposed between the first substrate 20 and the second substrate 21, a quantum rod film 23 disposed on one side of the first substrate 20, and a reflective layer 24 disposed on one side of the second substrate 21 adjacent to the dye liquid crystal 22. Wherein the dye liquid crystal 22 allows polarized light perpendicular to the long axis direction of the dye liquid crystal 22 to pass therethrough, and the quantum rod film 23 converts incident light into polarized light perpendicular to the long axis direction of the dye liquid crystal 22.

The first substrate 20 comprises a first side 201 close to the dye liquid crystal 22 and a second side 202 remote from the dye liquid crystal 22. In this embodiment, the quantum rod film 23 is located on the second side 202 of the first substrate 20.

The display panel 200 further includes a first electrode 25 disposed on the first side 201 of the first substrate 20, and a second electrode 26 disposed between the second substrate 21 and the reflective layer 24, wherein the first electrode 25 and the second electrode 26 control the dye liquid crystal 22 to rotate.

The display panel provided by the utility model comprises a first substrate and a second substrate which are oppositely arranged, dye liquid crystal positioned between the first substrate and the second substrate, a quantum rod film positioned on one side of the first substrate, and a reflecting layer positioned on one side of the second substrate close to the dye liquid crystal. Wherein the dye liquid crystal allows polarized light perpendicular to a long axis direction of the dye liquid crystal to pass therethrough, and the quantum rod film converts incident light into polarized light perpendicular to the long axis direction of the dye liquid crystal. Therefore, the quantum rod film can enable more external incident light to penetrate through the dye liquid crystal to reach the reflecting layer, and further enable more emergent light to enter human eyes, so that the absorption of the dye liquid crystal on the incident light can be reduced, and the brightness of the reflective liquid crystal display panel can be improved.

The present invention further provides a display device, which includes the display panel in any of the above embodiments, and therefore, the display device has the same beneficial effects as the display panel in any of the above embodiments, and the description thereof is omitted here.

The above description of the embodiments is only for helping understanding the technical solution of the present invention and its core idea; those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A display panel, comprising:

the first substrate and the second substrate are oppositely arranged;

a dye liquid crystal between the first substrate and the second substrate, the dye liquid crystal allowing polarized light perpendicular to a long axis direction of the dye liquid crystal to transmit therethrough;

a quantum rod film on one side of the first substrate;

the reflecting layer is positioned on one side of the second substrate close to the dye liquid crystal;

wherein the quantum rod film converts incident light into polarized light perpendicular to a long axis direction of the dye liquid crystal.

2. The display panel according to claim 1, wherein when the display panel is in a bright state, a long axis of the dye liquid crystal is arranged in a first direction; when the display panel is in a dark state, the long axis of the dye liquid crystal is arranged along a second direction, and the second direction is perpendicular to the first direction.

3. The display panel according to claim 2, wherein the quantum rod film is arranged in a direction perpendicular to the first direction.

4. The display panel of claim 1 wherein the first substrate comprises a first side proximate the dye liquid crystal and a second side distal from the dye liquid crystal, the quantum rod film being located on the first side of the first substrate.

5. The display panel according to claim 4, characterized in that the display panel further comprises:

a first electrode between the first substrate and the quantum rod film;

a second electrode between the second substrate and the reflective layer;

the first electrode and the second electrode control the dye liquid crystal to rotate.

6. The display panel according to claim 1, wherein the incident light is incident from the first substrate, and wherein the incident light comprises natural light.

7. The display panel according to claim 1, wherein the first substrate is a color filter substrate, and the second substrate is an array substrate.

8. The display panel according to claim 1, wherein the incident light reaches the reflective layer through the quantum rod film and the dye liquid crystal, and exits from the first substrate through the dye liquid crystal again.

9. The display panel according to claim 1, wherein the dye liquid crystal is a black dye liquid crystal.

10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.

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