CN203337949U - Light transmitting base board, display panel and display device - Google Patents

Abstract

The utility model discloses a light transmitting base board, a display panel and a display device, and relates to the technical field of displaying. Light using rate can be improved, and under the situation the power consumption is not increased, the display panel has the display effect of high brightness, high color saturation, high color purity and high color gamut. The light transmitting base board comprises a color filtering layer and an anti-reflection layer which is arranged on one side, close to a light source, of the color filtering layer. The anti-reflection layer is used for absorbing energy of incident light from the light source and generating the photoluminescence effect, and accordingly incident light with the wave length out of the color filtering layer wave length transmitting range in the incident light of the light source can be converted to light which can be transmitted through the color filtering layer.

Description

Light-transmitting substrate, display panel and display device

technical field

The utility model relates to the field of display technology, in particular to a light-transmitting substrate, a display panel and a display device.

Background technique

A liquid crystal display is a commonly used display device, and its display effect is mainly determined by a display panel. The display panel includes a light-transmitting substrate, and a common light-transmitting substrate is a color filter substrate.

The color filter substrate is an optical filter structure that expresses color. It can precisely select the light waves in a small range of wavelengths to pass, and reflect other wavelengths that do not want to pass. The color filter substrate generates three primary colors of red, green, and blue by filtering white light, and then mixes the three primary colors in different proportions to present a variety of colors, making the liquid crystal display display colorful. The color film substrate plays a key role in the viewing angle width, brightness, resolution, and color saturation of the LCD.

The inventors found that the light utilization rate of the light-transmitting substrate is very low at present. In order to make the display panel have higher brightness, color saturation, color purity and color gamut, it is necessary to increase the brightness of the backlight source and increase the power consumption.

Utility model content

The technical problem to be solved by the utility model is to provide a light-transmitting substrate, a display panel and a display device, which can improve the utilization rate of light, and make the display panel present high brightness and high color saturation without increasing power consumption. , high color purity and high color gamut display effect.

In order to solve the above technical problems, a light-transmitting substrate of the utility model adopts the following technical scheme:

The utility model provides a light-transmitting substrate, which includes a color filter layer and further includes:

An anti-reflection layer located on the side of the color filter layer close to the light source, the anti-reflection layer is used to absorb the energy of the incident light from the light source to produce a photoluminescence effect, thereby converting the incident light from the light source to the wavelength Incident light that is not within the wavelength range that the color filter layer can transmit is converted into light that is transparent to the color filter layer.

The anti-reflection layer includes quantum dots.

The thickness of the anti-reflection layer is 0.2-0.3 μm.

The light-transmitting substrate is a color filter substrate;

The color filter layer is a color filter layer.

The color filter layer includes a red area, a green area and a blue area, wherein,

The photoluminescent wavelength of the antireflection layer corresponding to the red region is within the red wavelength range;

The photoluminescence wavelength of the antireflection layer corresponding to the green region is within the wavelength range of green light;

The photoluminescence wavelength of the anti-reflection layer corresponding to the blue region is within the blue wavelength range.

The anti-reflection layer corresponding to the red region includes quantum dots whose photoluminescence wavelength is within the red wavelength range;

The antireflection layer corresponding to the green region includes quantum dots whose photoluminescent wavelength is within the green wavelength range;

The anti-reflection layer corresponding to the blue region includes quantum dots whose photoluminescence wavelength is within the blue wavelength range.

The embodiment of the utility model also provides a display panel, including the above-mentioned light-transmitting substrate.

In addition, the embodiment of the present utility model also provides a display device, which includes the display panel.

In the technical solution of the present invention, a light-transmitting substrate is provided. The light-transmitting substrate includes a color filter layer and an anti-reflection layer located on the side of the color filter layer close to the light source. The anti-reflection layer is used for By absorbing the energy of the incident light from the light source, a photoluminescence effect is generated, thereby converting the incident light from the incident light from the light source whose wavelength is not within the wavelength range that the color filter layer can pass through into the filter color Layer through which light can pass. The light-transmitting substrate with the structure can fully utilize light, and the display panel using the light-transmitting substrate has higher brightness, color saturation, color purity and color without increasing power consumption. area.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only the present invention For an embodiment of the new model, those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is a schematic structural diagram of a light-transmitting substrate in an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a color filter substrate in an embodiment of the present invention;

FIG. 3 is a flowchart of a method for preparing a color filter substrate in an embodiment of the present invention.

Explanation of reference signs:

1—glass substrate; 2—color filter layer; 3—anti-reflection layer;

4—black matrix; 5—color filter layer; 51—red area;

52—green area; 53—blue area; 6—transparent protective layer;

7—Transparent conductive film.

Detailed ways

The embodiment of the utility model provides a light-transmitting substrate, as shown in Figure 1, the light-transmitting substrate includes:

The color filter layer 2 also includes: an anti-reflection layer 3 located on the side of the color filter layer 2 close to the light source, the anti-reflection layer is used to absorb the energy of the incident light from the light source to generate a photoluminescence effect, thereby Converting incident light from the light source whose wavelength is not within the permeable wavelength range of the color filter layer into light permeable to the color filter layer.

In the technical solution of the present invention, a light-transmitting substrate is provided. The light-transmitting substrate includes a color filter layer and an anti-reflection layer located on the side of the color filter layer close to the light source. The anti-reflection layer is used for By absorbing the energy of the incident light from the light source, a photoluminescence effect is generated, thereby converting the incident light from the incident light from the light source whose wavelength is not within the wavelength range that the color filter layer can pass through into the filter color Layer through which light can pass. The light-transmitting substrate with the structure can fully utilize light, and the display panel using the light-transmitting substrate has higher brightness, color saturation, color purity and color without increasing power consumption. area.

Any material with photoluminescent properties, broad excitation spectrum and narrow emission spectrum can be used as the anti-reflection layer 3 in the embodiment of the present invention.

Exemplarily, the antireflection layer 3 includes quantum dots. Quantum dots are quasi-zero-dimensional nanomaterials composed of a small number of atoms. Quantum dots are usually nanoparticles composed of II-VI or III-V elements, with a size smaller than or close to the Bohr radius, and have obvious quantum effects. Because quantum dots have good photoluminescence performance, and have wide excitation spectrum and narrow emission spectrum, therefore, quantum dots can absorb the energy of incident light from described light source effectively, through photoluminescence effect, and then incident In the light, the light whose wavelength is not within the permeable range of the color filter layer is converted into light permeable by the color filter layer. In addition, quantum dots also have good photostability, and their emission spectrum can be controlled by changing the size of quantum dots. Quantum dots can be used in the field of display technology due to their advantages of high color gamut, high brightness, and low energy consumption.

The quantum dots in the anti-reflection layer 3 can be any kind of inorganic quantum dots, such as cadmium selenide, cadmium telluride and the like.

Preferably, the thickness of the anti-reflection layer 3 may be 0.2-0.3 μm.

Further, the transparent substrate may be a color filter substrate. The color filter layer may be a color filter layer. When the transparent substrate is a color filter substrate, its structure is shown in FIG. 2 .

Since the color filter layer 5 includes a red area 51, a green area 52 and a blue area 53, the anti-reflection layer 3 coated in the three different color areas should meet the requirement of emitting light when the coated material is photoluminescent. The color is the same as the color of the area it is in. Specifically, the photoluminescence wavelength of the anti-reflection layer 3 coated on the red area 51 should be within the range of red light wavelength (622-760nm); the photoluminescence wavelength of the anti-reflection layer 3 coated on the green area 52 should be within the range of green light within the range of wavelength (492-577nm); the photoluminescent wavelength of the antireflection layer 3 coated in the blue region 53 should be within the range of blue wavelength (435-450nm). The material of the anti-reflection layer 3 coated in each region is sufficient as long as its photoluminescent wavelength satisfies the above-mentioned wavelength range, which is not limited in the embodiment of the present invention.

Furthermore, when quantum dots are used as the anti-reflection layer 4 , different color regions in the color filter layer 5 should be coated with quantum dots with different photoluminescent wavelengths. By testing the spectrum of the quantum dots, the quantum dots whose photoluminescence wavelengths are in the red light wavelength range, the green light wavelength range, and the blue light wavelength range are respectively found. The quantum dots applied to the three color regions may be quantum dots of the same material with different particle sizes, or quantum dots of different materials. Generally, the larger the size of the quantum dot, the longer the photoluminescence wavelength.

Specifically, since the wavelength range of red light is 622-760 nm, it is preferable to coat the anti-reflection layer 3 including cadmium selenide quantum dots with a photoluminescence wavelength of 625 nm on the red region 51 .

Similarly, since the wavelength range of green light is 492-577nm, the antireflection layer 3 preferably comprising cadmium selenide quantum dots with a photoluminescence wavelength of 555nm is coated on the green region 52; since the wavelength range of blue light is 435-450nm, Therefore, the anti-reflection layer 3 preferably comprising cadmium selenide quantum dots with a photoluminescence wavelength of 445 nm is coated on the blue region 53 .

Specifically, as shown in Figure 2, the color filter substrate includes a glass substrate 1, preferably glass with a small thermal expansion coefficient and good flatness as the glass substrate 1, so as to better realize its support function in the color filter substrate .

A black matrix 4 is arranged on the glass substrate 1 , and the black matrix 4 and the glass substrate 1 have good adhesion. The main function of the black matrix 4 in the color filter substrate is to improve the contrast of the liquid crystal display and cover the phenomenon of oblique light leakage when the liquid crystal display is displayed. Therefore, a material with strong light-shielding properties and low reflectivity is preferred as the material used for the black matrix 4 . The metal chrome light-shielding layer and the black resin light-shielding layer can be used to make the black matrix 4 because they can meet the performance requirements of the black matrix 4 . In the embodiment of the present invention, the thickness of the black matrix 4 is about 1.1 μm.

The color filter substrate also includes a color filter layer 5 on the black matrix 4 . Since the color filter layer 5 needs to selectively absorb and transmit light, the color filter layer 5 should have a high transmittance. Moreover, in order to ensure the display effect of the display panel, the color of the light passing through the color filter layer 5 must be pure. Usually, when making the resin forming the color filter layer 5, commonly used organic pigments can be used to color the resin. The thickness of the color filter layer 5 is 2-3 μm.

Located on the color filter layer 5 is an anti-reflection layer 3 . Exemplarily, the thickness of the anti-reflection layer 3 may be 0.2-0.3 μm, specifically, the thickness may be set according to actual conditions.

In order to protect the color filter layer 5 and the anti-reflection layer 3 and increase the smoothness of the surface, a transparent protective layer 6 is formed above the anti-reflection layer 3 in the color filter substrate. In addition, the transparent protective layer 6 also has the functions of preventing pollution and the like.

Generally, the material selected for the transparent protective layer 6 is preferably a polymer material such as epoxy resin or acrylic resin.

The transparent conductive film 7 is located at the top of the layered structure of the color filter substrate, and the transparent protective layer 6 isolates the black matrix 4 from the transparent conductive film 7 . In order to ensure the stable structure of the color filter substrate, the transparent conductive film 7 needs to have good adhesion with the transparent protective layer 6 . The transparent conductive film 7 plays the role of electrical signal transmission in the color filter substrate, and should have characteristics such as low surface impedance and good conductivity. In addition, in order to allow light to fully pass through and irradiate onto the anti-reflection layer 3 , the transparent conductive film 7 should also have relatively high transparency. Since indium tin oxide can meet all the above performance requirements of the transparent conductive film 7, it is usually used as a transparent conductive film.

The color filter substrate with the above structure, due to the existence of the anti-reflection layer 3, makes the color filter substrate have a higher utilization rate of light, effectively increasing the brightness and color saturation of the light passing through the color filter substrate , color purity and color gamut.

In order to prepare the above light-transmitting substrate including the color filter layer 2 and the anti-reflection layer 3 on the color filter layer 2, the embodiment of the present utility model also provides a preparation method of the light-transmitting substrate, the preparation method comprising :

An anti-reflection layer 3 is formed on the side of the color filter layer 2 close to the light source.

Further, when the light-transmitting substrate is a color filter substrate, for example, as shown in FIG. 3 , the preparation method of the color filter substrate includes:

Step S01, forming a black matrix on a glass substrate;

Deposit a layer of material for the black matrix 4 on the entire glass substrate 1, cover it with a mask plate with the required pattern, expose it to ultraviolet light, develop it, and finally obtain the black matrix 4 with the required pattern arrangement on the surface of the glass substrate 1 .

Step S02, forming a color filter layer on the black matrix;

The color filter layer 5 can be deposited on the black matrix 4 by inkjet printing, pigment dispersion method, printing and other methods. Wherein, since the color filter layer 5 includes a red area 51 , a green area 52 , and a blue area 53 , it should be deposited three times respectively. Specifically, as an example, the red area 51 is deposited first, and a layer of red pigment should be coated on the entire black matrix 4, covered with a corresponding mask, exposed and developed to obtain the red area 51; then the green area 52 is deposited , apply a green pigment on the entire black matrix 4, use a corresponding mask to cover, expose and develop, and obtain a green area 52; finally deposit a blue area 53, apply a blue pigment on the entire black matrix 4, and use The corresponding mask plate is covered, exposed and developed, and finally the blue area 53 is obtained; after the above process, a layer of color filter including the red area 51, the green area 52 and the blue area 53 is formed on the entire black matrix 4 Layer 5.

Step S03, forming an antireflection layer on the color filter layer;

The anti-reflection layer 3 can be deposited on the color filter layer 5 by inkjet printing, spin coating, photosensitive resin dispersion method, printing and other methods. Since different color regions on the color filter layer 5 should be coated with materials with different photoluminescent wavelengths as the anti-reflection layer 3, the anti-reflection layer 3 should also be deposited three times when depositing the anti-reflection layer 3 on the color filter layer 5. Specifically, when depositing the anti-reflection layer 3 including quantum dots, the photosensitive resin dispersion method is preferred in the embodiment of the present invention. The photosensitive resin dispersion method is to disperse quantum dots in a certain photosensitive resin to obtain a photosensitive quantum dot photoresist, and then obtain a patterned antireflection layer 3 containing quantum dots through coating, exposure, and development.

Step S04, forming a transparent protective layer on the antireflection layer;

The transparent protective layer 6 can be formed on the anti-reflection layer 3 by means of deposition, coating and the like.

Generally, the material selected for the transparent protective layer 6 is preferably epoxy resin and acrylic resin polymer materials.

Step S05 , depositing a transparent conductive film on the transparent protective layer.

The transparent conductive film 7 can be formed on the transparent protective layer 6 by means of deposition, sputtering, coating and the like.

Generally, the material selected for the transparent conductive film 7 can be transparent conductive materials such as indium tin oxide or indium zinc oxide, and indium tin oxide is preferred in the embodiment of the present invention.

In addition, this embodiment also provides a display panel, including the transparent substrate. The light-transmitting substrate forms an antireflection layer 3 on the side of the color filter layer 2 close to the light source, which increases the utilization rate of light. When the light-transmitting substrate is used in a display panel, the display panel has a higher color gamut, higher brightness, color saturation, and color purity without increasing power consumption.

Further, an embodiment of the present invention also provides a display device, the display device includes the light-transmitting substrate, and the display device may be: a liquid crystal panel, an electronic paper, an OLED panel, a mobile phone, a tablet computer, a television, Monitors, notebook computers, digital photo frames, navigators and any other products or components with display functions.

The above is only a specific embodiment of the present utility model, but the scope of protection of the present utility model is not limited thereto. Anyone familiar with the technical field can easily think of changes or changes within the technical scope disclosed by the utility model Replacement should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (8)

1. a transparent substrates, comprise colour filter, it is characterized in that, also comprises:

Be positioned at the antireflection layer of described colour filter near light source one side, described antireflection layer is for absorbing the energy from the incident light of described light source, produce the photoluminescence effect, thereby the incident light that will can not see through in wavelength coverage at described colour filter from the incident light medium wavelength of described light source is converted into the permeable light of described colour filter.

2. transparent substrates according to claim 1, is characterized in that,

Described antireflection layer comprises quantum dot.

3. transparent substrates according to claim 1 and 2, is characterized in that,

Described antireflection layer thickness is 0.2～0.3 μ m.

4. transparent substrates according to claim 1, is characterized in that,

Described transparent substrates is color membrane substrates;

Described colour filter is color filter layer.

5. transparent substrates according to claim 4, is characterized in that,

Described color filter layer comprises red area, green area and blue region, wherein,

The photoluminescence wavelength of the antireflection layer that described red area is corresponding is in the long scope of red wave-wave;

The photoluminescence wavelength of the antireflection layer that described green area is corresponding is in green wavelength;

The photoluminescence wavelength of the antireflection layer that described blue region is corresponding is in the blue light wavelength scope.

6. transparent substrates according to claim 5, is characterized in that,

The antireflection layer that described red area is corresponding comprises the quantum dot of photoluminescence wavelength in the long scope of red wave-wave;

The antireflection layer that described green area is corresponding comprises the quantum dot of photoluminescence wavelength in green wavelength;

The antireflection layer that described blue region is corresponding comprises the quantum dot of photoluminescence wavelength in the blue light wavelength scope.

7. a display panel, is characterized in that, comprises as the described transparent substrates of claim 1-6 any one.

8. a display device, is characterized in that, comprises display panel as claimed in claim 7.

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