CN108646456B - Display module and display device - Google Patents
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- CN108646456B CN108646456B CN201810402514.8A CN201810402514A CN108646456B CN 108646456 B CN108646456 B CN 108646456B CN 201810402514 A CN201810402514 A CN 201810402514A CN 108646456 B CN108646456 B CN 108646456B
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133514—Colour filters
Abstract
The application discloses a display module and a display device, which relate to the technical field of display and comprise a bluing module and a blue light filtering membrane, wherein the bluing module comprises a backlight module and a display panel which are sequentially arranged in the direction vertical to the plane where the display module is arranged, and the blue light filtering membrane is arranged in the light emitting direction of the backlight module; the blue light filtering film is used for absorbing blue light emitted by the display module, and the blue emitting module is used for increasing blue chromaticity of the display module, so that chromaticity of the display module in a white picture display state is C (X1, Y1), wherein X1 is 0.295-0.313, and Y1 is 0.31-0.33. So, effectively avoid display module assembly and display device to appear the yellow phenomenon of picture under the eyeshield mode, be favorable to promoting display effect.
Description
Technical Field
The application relates to the technical field of display, in particular to a display module and a display device.
Background
Generally, the wavelength of visible light is between 400-700 nm. Infrared light with wavelengths above 700nm and ultraviolet light with wavelengths below 400nm can be filtered through the cornea and the lens, with the greatest effect on the retina being blue light between 415 and 455 nm.
Scientific research shows that the spectrum emitted by the display contains a large amount of high-energy short-wave blue light with irregular frequency, and the short-wave blue light has extremely high energy and can penetrate through crystalline lens to directly reach retina. The blue light irradiates the retina to generate free radicals, and the free radicals can cause the retinal pigment epithelial cells to die, and the die of the epithelial cells can cause the photosensitive cells to lack nutrients to cause visual impairment, thereby directly causing irreversible damage to the optic nerve.
Studies have shown that macular degeneration can be caused by blue light in sunlight, as well as blue light in displays and general daylight lamps, causing the degeneration and sleep disorder. Doctors and experiments prove that the harm of blue light is confirmed. At present, most of liquid crystal displays adopt a blue light LED to excite fluorescent powder, and the energy of the blue light part is larger, so that the damage to human eyes is larger.
In the technical field of display, the damage of a display device to human eyes is reduced by a method of reducing blue light energy, the phenomenon that the display device displays yellow under a white picture is caused when the blue light energy is reduced, and the display effect under the white picture is greatly reduced.
Disclosure of Invention
In view of this, the technical problem that this application will be solved provides a display module assembly and display device, introduces and sends blue module and blue light filtration membrane, and blue light filtration membrane is used for absorbing the blue light that the display module assembly sent, sends blue module and is used for the increase display module assembly's blue colourity, so, can filter and realize the eyeshield mode to the great blue light of people's eye harm, can improve the picture yellow phenomenon partially under the white picture display state again, is favorable to promoting display module assembly and display device's display effect, and then is favorable to promoting user's visual experience effect.
In order to solve the technical problem, the following technical scheme is adopted:
in a first aspect, the application provides a display module, which is characterized by comprising a bluing module and a blue light filtering membrane, wherein the bluing module comprises a backlight module and a display panel which are sequentially arranged in a direction perpendicular to a plane where the display module is located, and the blue light filtering membrane is arranged in the light outgoing direction of the backlight module;
when a white picture is displayed, the bluing module comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, and the red sub-pixel is positioned at a wave band lambda1Has a light intensity of Q1The green sub-pixel is in a wave band lambda2Has a light intensity of Q2The blue sub-pixel is in the wave band lambda3Has a light intensity of Q3Wherein, λ is less than or equal to 600nm1≤700nm，500nm≤λ2≤600nm，400nm≤λ3≤500nm，Q1:Q2:Q31:1.8: 2.5; the blue light filtering film is used for absorbing blue light emitted by the display module, and the blue emitting module is used for increasing the blue chromaticity of the display module, so that the chromaticity of the display module in a white picture display state is C (X1, Y1), wherein X1 is 0.295-0.313, and Y1 is 0.31-0.33.
In a second aspect, the present application further provides a display device, which includes a display module, where the display module is the display module provided in the present application.
Compared with the prior art, this application display module assembly and display device, reached following effect:
the display module and the display device introduce the bluing module, and the blue light filtering membrane is arranged in the bluing module in the light-emitting direction of the backlight module; wherein, blue light filtration membrane is used for absorbing the blue light that the display module assembly sent to reduce the influence that the blue light caused to the people's eye, make display module assembly and display device realize the eyeshield mode, it is used for increasing the blue colourity of display module assembly to send the blue module assembly, be favorable to improving display module assembly and display device under the white picture and show the phenomenon of yellow partially, so, improved the phenomenon of showing yellow partially when realizing the eyeshield modernization, be favorable to promoting display module assembly and display device's display effect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a cross-sectional view of a display module according to an embodiment of the present disclosure;
fig. 2 is a top view of a bluing module in the display module according to the embodiment of the present disclosure;
FIG. 3 is a comparison graph of white frames of a display module and a conventional display module provided in the present application;
fig. 4 is another cross-sectional view of a display module according to an embodiment of the disclosure;
fig. 5 is another cross-sectional view of a display module according to an embodiment of the disclosure;
fig. 6 is another cross-sectional view of a display module according to an embodiment of the disclosure;
fig. 7 is another cross-sectional view of a display module according to an embodiment of the disclosure;
fig. 8 is a schematic diagram illustrating a pixel unit in a bluing module according to an embodiment of the present disclosure;
fig. 9 is another schematic diagram of a pixel unit in a bluing module according to an embodiment of the present disclosure;
fig. 10 is a top view of a backlight module according to an embodiment of the disclosure;
FIG. 11 is a cross-sectional view taken along line A-A of the backlight module shown in FIG. 10;
FIG. 12 shows a membrane layer structure of a blue light filtering membrane provided by an embodiment of the present application;
FIG. 13 is a schematic view showing another membrane structure of a blue light filtering membrane according to an embodiment of the present disclosure;
fig. 14 is a cross-sectional view of a second substrate according to an embodiment of the present disclosure;
fig. 15 is an equivalent circuit diagram of a second substrate according to an embodiment of the present disclosure;
fig. 16 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, within which a person skilled in the art can solve the technical problem to substantially achieve the technical result. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
Scientific research shows that in the prior art, a spectrum emitted by a display device contains a large amount of high-energy short-wave blue light with irregular frequency, and the short-wave blue light has extremely high energy and can penetrate through crystalline lens to directly reach retina. The blue light irradiates the retina to generate free radicals, and the free radicals can cause the retinal pigment epithelial cells to die, and the die of the epithelial cells can cause the photosensitive cells to lack nutrients to cause visual impairment, thereby directly causing irreversible damage to the optic nerve.
At present, the damage of the blue light of the display device to human eyes is usually reduced by reducing the blue light energy, for example, the blue light voltage can be reduced or a layer of blue light protection film is added, although the blue light energy is reduced, the display device is enabled to display a yellow phenomenon under a white picture, and the visual experience effect of a user is greatly influenced.
In view of this, the application provides a display module assembly and display device introduces and sends blue module and blue light filtration membrane, and blue light filtration membrane is used for absorbing the blue light that the display module assembly sent, sends blue module and is used for the increase display module assembly's blue colourity, so, can filter and harm great blue light to people's eye and realize the eyeshield mode, can improve the phenomenon that the picture is yellow partially under the white picture display state again, be favorable to promoting display module assembly and display device's display effect, and then be favorable to promoting user's visual experience effect.
The following is a detailed description of specific examples.
Referring to fig. 1, which is a cross-sectional view of a display module provided in an embodiment of the present disclosure, and fig. 2 is a top view of a blue-emitting module in the display module provided in the embodiment of the present disclosure, referring to fig. 1, the display module 100 includes a blue-emitting module 10 and a blue-light filtering film 20, the blue-emitting module 10 includes a backlight module 101 and a display panel 102 sequentially arranged in a direction perpendicular to a plane of the display module 100, and the blue-light filtering film 20 is arranged in a light-emitting direction of the backlight module 101;
referring to fig. 2, when displaying a white picture, the bluing module 10 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113, where the light intensity of the red sub-pixel 111 in a wavelength band λ 1 is Q1, the light intensity of the green sub-pixel 112 in a wavelength band λ 2 is Q2, and the light intensity of the blue sub-pixel 113 in a wavelength band λ 3 is Q3, where λ 1 is equal to or greater than 600nm and equal to or less than 700nm, λ 2 is equal to or greater than 500nm and equal to or less than 600nm, λ 3 is equal to or greater than 400nm and equal to or less than 500nm, and Q1: Q2: Q3 is equal to 1: 1.8; the blue light filter 20 is used for absorbing blue light emitted by the display module 100, and the blue emitting module 10 is used for increasing the blue chromaticity of the display module 100, so that the chromaticity of the display module 100 in a white screen display state is C (X1, Y1), wherein X1 is 0.295 to 0.313, and Y1 is 0.31 to 0.33. It should be noted that the chromaticity C (X1, Y1) provided in the examples of the present application generally allows a process fluctuation range of A, wherein A ≦ 0.03.
Specifically, referring to fig. 1, the display module 100 provided in the present embodiment includes a blue light emitting module 10 and a blue light filtering film 20 sequentially disposed along a direction perpendicular to a plane of the display module 100, where the blue light emitting module 10 includes a backlight module 101 and a display panel 102. In particular, the blue light filtering film 20 is used for absorbing the blue light emitted by the display module 100, so as to reduce the light intensity of the blue light reaching human eyes and reduce the harm of the blue light to the human eyes. The bluing module 10 is used to increase the blue chromaticity of the display module 100, and the bluing module 10 includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113, please refer to fig. 2, wherein, in the bluing module 10, in the white picture state, the light intensity ratio of different bands satisfies RY (600 nm-700 nm): GY (500 nm-600 nm): BY (400 nm-500 nm) ═ 1:1.8: 2.5; in the display module in the prior art, no blue-emitting module is introduced, and the light intensity ratio of different bands of the conventional module formed BY combining the conventional backlight module and the display panel generally satisfies RY (600 nm-700 nm): GY (500 nm-600 nm): BY (400 nm-500 nm): 1:1.5:1.5 in a white picture state, so that compared with the module in the prior art, in the corresponding band, the blue-emitting module 10 provided in the embodiment of the present application slightly increases the light intensity of green light, especially increases the light intensity of blue light, so that the light intensity of blue light is strongest, and thus the blue-emitting module 10 displays partial blue in the white picture state. Because most of the blue light emitted by the display module 100 is filtered by the blue light filtering film 20 when only the blue light filtering film 20 is introduced, the display module 100 is yellow in the white picture state due to the blue light loss, and the blue chromaticity of the display module 100 is increased by introducing the blue emitting module 10 in the present application, so as to make up the excessive blue light loss caused by the blue light filtering film 20, so that the chromaticity of the display module 100 in the white picture display state is C (X1, Y1), wherein X1 is 0.295-0.313, and Y1 is 0.31-0.33. Specific values of chromaticity may be (0.30,0.31), or (0.30,0.32), or (0.313,0.329), or (0.295,0.315), for example, where chromaticity here represents coordinate values in the CIE1931 chromaticity diagram, where X1 represents a red color component, Y1 represents a green color component, and CIE represents acronym of Commission international de L' Eclairage, which stands for the Commission Internationale de L. When the chromaticity that display module assembly 100 shows under the white picture satisfies above-mentioned chromatic value, display module assembly 100 will present white under the white picture, has effectively improved display module assembly 100 and has shown yellow phenomenon partially under the white picture to under the prerequisite that can avoid too much blue light to cause harm to the human eye, be favorable to promoting display module assembly 100's display effect, be favorable to promoting user's visual experience effect simultaneously.
It should be noted that the sizes of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 shown in fig. 2 do not represent actual sizes, and are only schematic illustrations. In addition, the pixel arrangement of each sub-pixel is also schematic, and in practical application, different pixel arrangement modes can be selected according to needs, which is not specifically limited in the present application.
Fig. 3 is a white image spectrum comparison graph of the display module and the conventional display module provided in the present application, where a curve D represents a spectrum of the conventional display module in the prior art, and a curve B represents a spectrum of the display module 100 provided in the present application, where the conventional display module refers to a display module without a blue light filtering film and a blue emitting module. As can be seen from fig. 3, in the white picture frequency spectrum of the conventional display module, the peak value of the wavelength around 450nm is significantly higher than that of the display module provided in the embodiment of the present application, and after the blue light filtering film and the bluing module are introduced, the peak value of the wavelength around 450nm is significantly reduced, that is, the blue light filtering film and the bluing module weaken the energy of the blue light that damages the human eye, and can protect the human eye to a certain extent.
Optionally, with continued reference to fig. 1, the peak value of the transmission spectrum of the blue light filtering membrane 20 provided in the embodiment of the present application is λ4，λ4The wavelength of the blue light absorbed by the blue light filter 20 is λ (480 ± 10) nm5Wherein, λ is more than or equal to 400nm5< 455nm, blue light filter 20 for a wavelength of lambda5Has an absorptivity of more than 96.4%. That is, the blue light filtering membrane 20 can filter the blue light in a wavelength range of 400nm ≦ λ5Most of blue light with the wavelength of less than 455nm is absorbed, and considering that the blue light with the wavelength of 415 nm-455 nm has the greatest damage to human eyes, the short-wave blue light has extremely high energy and can penetrate through crystalline lens and reach retina, the blue light irradiates the retina to generate free radicals, the free radicals can cause the retinal pigment epithelial cells to die, the die of the epithelial cells can cause the photosensitive cells to lack nutrients to cause visual impairment, and irreversible damage is directly caused to the eye nerves. The blue light filtering film 20 introduced by the application has the wavelength range of more than or equal to lambda and more than or equal to 400nm5The absorptivity of < 455nm reaches 96.4% or more, that is, the blue light filter membrane 20 can absorb most of the blue light in the wave band with the greatest damage to human eyes, so that the damage of the part of the blue light to the human eyes is reduced, and the display provided by the embodiment of the application is realizedThe module 100 has an eye protection function.
Optionally, fig. 4 is another cross-sectional view of the display module provided in the embodiment of the present application, fig. 5 is another cross-sectional view of the display module provided in the embodiment of the present application, fig. 6 is another cross-sectional view of the display module provided in the embodiment of the present application, fig. 7 is another cross-sectional view of the display module provided in the embodiment of the present application, referring to fig. 4 to 6, a display panel 102 includes a first substrate 11 and a second substrate 12 that are disposed opposite to each other, and a liquid crystal 13 filled between the first substrate 11 and the second substrate 12, and a backlight module 101 is located on a side of the second substrate 12 away from the first substrate 11;
referring to fig. 4, the blue light filtering film 20 is located between the second substrate 12 and the backlight module 101, or, referring to fig. 5, the blue light filtering film 20 is located on a side of the second substrate 12 close to the first substrate 11, or, referring to fig. 6, the blue light filtering film 20 is located on a side of the first substrate 11 close to the second substrate 12, or, referring to fig. 7, the blue light filtering film 20 is located on a side of the first substrate 11 far from the second substrate 12.
Fig. 4-7 show several possible positions of the blue light filtering film 20 in the display module 100, when the display module 100 is a liquid crystal display module 100, a light source needs to be provided by the backlight module 101, and the blue light filtering film 20 in the several embodiments shown in fig. 4-7 is located in the light emitting direction of the backlight module 101, so that the blue light in the light emitted by the backlight module 101 can be absorbed, and the harm of the blue light to human eyes is reduced. It should be noted that fig. 4-7 only schematically show several positions of the blue light filtering film 20, and besides these positions, the blue light filtering film 20 may be disposed on other film layers according to various refined film layer relationships of the display module 100, which is not specifically limited in this application as long as the blue light filtering film is located in the light outgoing direction of the backlight module 101.
Alternatively, the bluing module 10 in the embodiment of the present application may be formed in a variety of manners, and the applicant found through numerous experiments that the bluing module 10 may be formed by changing the retardation amount of the liquid crystal 13 between the first substrate 11 and the second substrate 12 in the embodiment of fig. 4 to 7, for example. In the embodiment of the present application, the retardation of the liquid crystal 13 between the first substrate 11 and the second substrate 12 is a, a is less than or equal to 320nm, and the module formed by the backlight module 101 and the display panel 102 is blue, so as to form the blue-emitting module 10. It should be noted that, changing the phase retardation of the liquid crystal 13 can be realized by changing the thickness of the liquid crystal cell, and when the thickness of the liquid crystal cell is reduced, the phase retardation of the liquid crystal 13 is correspondingly reduced, and the phase retardation can be measured by a special measuring tool. Therefore, the blue module 10 can be realized by changing the phase retardation of the liquid crystal without changing the existing production process of the display module 100, and only by controlling the thickness of the liquid crystal box in the box forming process, and the method is simple and easy to operate.
Except that the blue emitting module 10 is implemented by changing the phase retardation of the liquid crystal, optionally, with reference to fig. 1 and 2, the blue emitting module 10 in the present application can also be implemented by changing the light transmission area of the pixel, in the display module 100 in the prior art, the light transmission area of each sub-pixel is generally equal, in the embodiment of the present application, the light transmission area of the blue sub-pixel 113 is increased, so that the light transmission area of the blue sub-pixel 113 is greater than the light transmission area of the red sub-pixel 111, and the light transmission area of the blue sub-pixel 113 is greater than the light transmission area of the green sub-pixel 112.
Specifically, referring to fig. 8, fig. 8 is a schematic diagram of a pixel unit in the blue module provided in the embodiment of the present disclosure, where the pixel unit includes a red sub-pixel 111, a green sub-pixel 112, and a blue sub-pixel 113, and the illustrated boxes represent the sizes of the opening areas of the sub-pixels, i.e. the light transmission areas, in the embodiment shown in fig. 8, the heights of the opening areas of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 are h1, h2, and h3, and the widths of the opening areas are d1, d2, and d3, where h1 is h2 ═ h3, d1 d2 is < d3, the light transmission area of each sub-pixel is the product of the above-mentioned heights and widths, i.e. the light transmission area of the red sub-pixel 111 is h1 ═ d 5, the area of the green sub-pixel 112 is h2 ═ d2, the area of the blue sub-pixel 113 is h 6324, and the maximum area of the blue sub-pixel 113 is 82599, therefore, the maximum area of the blue sub-pixel 113 h 598653, the light transmission areas of the red and green sub-pixels 112 are equal. The increase of the light transmission area of the blue sub-pixel 113 is equivalent to increase of the amount of blue light transmitted under the same condition, and the intensity of the blue light is enhanced, so that the blue module 10 is blue overall, blue light loss caused by filtering of excessive blue light by the blue light filtering film 20 is compensated, and the yellow display phenomenon of the display module 100 under a white picture is favorably improved. In this embodiment, the blue emitting module 10 may be formed by increasing the light transmission area of the blue sub-pixel 113 while keeping the light transmission areas of the red sub-pixel 111 and the green sub-pixel 112 unchanged on the basis of the conventional display module 100, or the blue emitting module 10 may be formed by appropriately decreasing the light transmission areas of the red sub-pixel 111 and the green sub-pixel 112 and appropriately increasing the light transmission area of the blue sub-pixel 113, which is not specifically limited in this application.
Optionally, fig. 9 is another schematic diagram of a pixel unit in the blue module provided in this embodiment, the opening areas of the red sub-pixel 111, the green sub-pixel 112, and the blue sub-pixel 113 have heights h1, h2, and h3, and widths d1, d2, and d3, respectively, where h1 ═ h2 ═ h3, d1 ≦ d2 ≦ d3, and the light transmission area of each sub-pixel is a product of the heights and the widths, that is, the light transmission area of the red sub-pixel 111 is h1 ═ d1, the light transmission area of the green sub-pixel 112 is h2 × 2, and the light transmission area of the blue sub-pixel 113 is h3 × 3, since h1 ═ h2 ═ h2, d1 ≦ d3, and the light transmission areas of the three sub-pixels are all smaller than the areas of the red sub-pixel 111. In the actual production process, the light transmission area of the red sub-pixel 111 can be kept unchanged, the light transmission areas of the green sub-pixel 112 and the blue sub-pixel 113 are properly increased, the light transmission area increase amplitude of the green sub-pixel 112 is smaller, and the light transmission area increase amplitude of the blue sub-pixel 113 is larger; of course, the light-transmitting area of the green sub-pixel 112 can be kept unchanged, and the light-transmitting area of the red sub-pixel 111 can be appropriately reduced and the light-transmitting area of the blue sub-pixel 113 can be increased; these two kinds of modes homoenergetic increase blue subpixel 113's light transmission area for the volume of the blue light that sees through increases, and then increases the light intensity of blue light, makes bluing module 10 bluing, in order to compensate blue light disappearance that blue light filtration membrane 20 filtered and caused after too much blue light, improves display module 100 and shows yellow phenomenon partially under the white picture.
In the embodiment shown in fig. 8 and 9, the size of the light-transmitting area of each sub-pixel represented by a box is not an actual size, and is only a schematic illustration. In addition, in the embodiments shown in fig. 8 and 9, the opening areas of the sub-pixels have the same height and different widths, so that the light transmission areas are different, except for this way, the widths of the opening areas of the sub-pixels can be set to be the same, and the light transmission areas are designed to be different by different heights, or the lengths and the widths can be designed to be different, which is not specifically limited in the present application.
Optionally, to implement the blue light emitting module 10, the light emitting diode in the backlight module may be selected as a long wavelength diode, specifically, fig. 10 is a top view of the backlight module provided in the embodiment of the present application, fig. 11 is a cross-sectional view a-a of the backlight module in fig. 10, the backlight module 101 includes a substrate 30 and the light emitting diode 31 disposed on the substrate 30, in addition, a reflective sheet 74 is disposed between the light emitting diode 31 and the substrate 30, a diffusion sheet 71, a lower light enhancement sheet 72 and an upper light enhancement sheet 73 are sequentially stacked on a side of the light emitting diode 31 away from the substrate 30, and since the diffusion sheet 71, the lower light enhancement sheet 72, the upper light enhancement sheet 73 and the reflective sheet 74 are transparent, these film layers are not shown in the top view of fig. 10. The dominant wavelength of the LED 31 is λ6Wherein λ is6Is more than or equal to 455 nm. The applicant finds out through numerous experiments that, in a white picture, when the wavelength of the light emitting diode 31 in the backlight module 101 is increased, the picture presented by the backlight module 101 and the display panel 102 will turn blue, and the longer the wavelength of the light emitting diode 31 is, the bluer the chromaticity in the white picture is, and the user can select the dominant wavelength λ as required6The light emitting diode 31 with the wavelength of 455nm or more is used for providing the light source of the display module 100.
It should be noted that fig. 10 and 11 of the present application only schematically show the structure of the backlight module by using a direct-type backlight module as an example, in addition, the backlight module can also be embodied as a side-in type structure, and the present application does not specifically limit the form of the backlight module.
In the embodiment shown in fig. 10 and 11, the reflective sheet 74 can reflect the light emitted from the light emitting diode 31 to improve the utilization rate of the light. The diffusion sheet 71 is basically composed of a diffusion layer, a substrate and a protective layer, wherein the substrate is a material having high transmittance, such as polyethylene terephthalate (PET), Polycarbonate (PC), etc., and the diffusion layer and the protective layer are usually made of acrylic resin. This application can let light see through diffusion coating and produce diffuse reflection through setting up diffusion piece 71, makes light evenly distributed, guarantees backlight module face internal brightness homogenization. In addition, the lower brightness enhancement sheet 72 and the upper brightness enhancement sheet 73 are arranged on one side of the diffusion sheet 71, which is far away from the light emitting diode element 20, and the brightness of the backlight module can be integrally improved through the combined action of the lower brightness enhancement sheet 72 and the upper brightness enhancement sheet 73.
Optionally, the light emitting diode 31 comprises phosphor having a wavelength λ7Wherein λ is7(565 ± 5) nm. The applicant found through numerous research experiments that when the wavelength of the phosphor is set to be (565 ± 5) nm, the light emitted by the combination of the phosphor and the long wavelength led will be biased to blue, forming a blue emitting module.
The embodiments of the present application provide three forming methods of the bluing module, which are respectively to control the retardation of the liquid crystal phase, increase the light transmission area of the blue sub-pixel, and use the long wavelength light emitting diode, and it should be noted that, to form the bluing module meeting the requirements, under the combined action of the blue light emitting module and the blue light filtering film, the display module can display white picture, and the chromaticity of the display module in the white picture display state is C (X1, Y1), wherein X1 is 0.295-0.313, Y1 is 0.31-0.33, the blue emitting module can adopt any one of the above forming modes or the combination of any two forming modes, or a combination of the three forming manners, the control of the parameters in each forming manner can be specifically set according to the actual situation, and finally, the chromaticity of the display module in the white picture display state can meet the above range.
Alternatively, fig. 12 shows a schematic diagram of an embodiment of the present applicationFor a membrane structure of a blue light filtering membrane, fig. 13 shows another membrane structure of a blue light filtering membrane provided in an embodiment of the present application, and the blue light filtering membrane 20 includes TiO sequentially arranged2 Layer 203, Y2O3Layer 202 and SiO2Layer 201, see FIG. 12, SiO2Layer 201 is arranged at Y2O3The layer 202 is adjacent to one side of the backlight 101, or, referring to FIG. 13, SiO2Layer 201 is arranged at Y2O3The side of the layer 202 facing away from the backlight 101.
Alternatively, fig. 14 is a cross-sectional view of a second substrate provided in an embodiment of the present disclosure, fig. 15 is an equivalent circuit diagram of the second substrate provided in the embodiment of the present disclosure, referring to fig. 14 and fig. 15, the second substrate 12 includes a driving functional layer 121 and an electrode layer 122 sequentially disposed along a direction perpendicular to a plane of the display module 100, the driving functional layer 121 includes a plurality of thin film transistors 40 arranged in an array, and the electrode layer 122 includes a first electrode layer 51, an insulating layer 52, and a second electrode layer 53 sequentially disposed; the second electrode layer 53 includes a plurality of second electrodes 54, and at least a portion of the second electrodes 54 are electrically connected to the drains of the thin film transistors 40 in a one-to-one correspondence.
Specifically, referring to fig. 14, the first electrode layer 51 may be embodied as a common electrode layer 122, the second electrode layer 53 is embodied as a pixel electrode layer 122, the pixel electrode layer 122 includes a plurality of pixel electrodes (i.e., second electrodes 54) arranged in an array, referring to fig. 15, the second substrate 12 includes a plurality of gate lines 61 extending along a first direction and arranged along a second direction, a plurality of data signal lines 62 extending along the second direction and arranged along the first direction, the gates 41 of the thin film transistors 40 located in a same row are connected to the same gate line 61, the sources 42 of the thin film transistors 40 located in a same column are connected to the same data signal line 62, the drains 43 of the thin film transistors 40 are electrically connected to the pixel electrodes in a one-to-one correspondence manner, when the thin film transistors 40 are turned on, the drains 43 of the thin film transistors 40 provide a voltage to the pixel electrodes 54, a deflection voltage capable of driving the liquid crystal 13 is generated between the pixel electrodes and the, thereby realizing the display of the picture.
Based on the same inventive concept, the present application further provides a display device 200, and fig. 16 is a schematic structural diagram of the display device provided in the embodiment of the present application, and referring to fig. 16, the display device 200 includes the display module 100 in the present application. It should be noted that the display device 200 provided in the embodiment of the present application may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. In the present application, the embodiment of the display device 200 can refer to the embodiment of the display module 100, and repeated descriptions are omitted here.
According to the embodiments, the application has the following beneficial effects:
the display module and the display device introduce the bluing module, and the blue light filtering membrane is arranged in the bluing module in the light-emitting direction of the backlight module; wherein, blue light filtration membrane is used for absorbing the blue light that the display module assembly sent to reduce the influence that the blue light caused to the people's eye, make display module assembly and display device realize the eyeshield mode, it is used for increasing the blue colourity of display module assembly to send the blue module assembly, be favorable to improving display module assembly and display device under the white picture and show the phenomenon of yellow partially, so, improved the phenomenon of showing yellow partially when realizing the eyeshield modernization, be favorable to promoting display module assembly and display device's display effect.
The foregoing description shows and describes several preferred embodiments of the present application, but as aforementioned, it is to be understood that the application is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the application, which is to be protected by the claims appended hereto.
Claims (11)
1. A display module is characterized by comprising a blue-emitting module and a blue-light filtering membrane, wherein the blue-emitting module comprises a backlight module and a display panel which are sequentially arranged in a direction vertical to the plane of the display module, and the blue-light filtering membrane is arranged in the light emergent direction of the backlight module;
when a white picture is displayed, the blue emitting module comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, and before the blue light is filtered by the blue light filtering film, the red sub-pixel is at a wave band lambda1Has a light intensity of Q1The green sub-pixel is in a wave band lambda2Has a light intensity of Q2The blue sub-pixel is in the wave band lambda3Has a light intensity of Q3Wherein, λ is less than or equal to 600nm1≤700nm，500nm≤λ2≤600nm，400nm≤λ3≤500nm，Q1:Q2:Q3＝1:1.8:2.5；
The blue light filtering film is used for absorbing blue light emitted by the display module, the blue emitting module is used for increasing blue chromaticity of the display module, and the chromaticity of the display module in a white picture display state is C (X1, Y1) after the blue light filtering film is used for filtering, wherein X1 is 0.295-0.313, and Y1 is 0.31-0.33.
2. The display module of claim 1, wherein the blue light filter film has a peak transmission spectrum of λ4，λ4The wavelength of the blue light absorbed by the blue light filtering film is lambda (480 +/-10) nm5Wherein, λ is more than or equal to 400nm5< 455nm, the blue light filtering film has lambda5Has an absorptivity of more than 96.4%.
3. The display module according to claim 1, wherein the display panel comprises a first substrate and a second substrate disposed opposite to each other and a liquid crystal filled between the first substrate and the second substrate, and the backlight module is disposed on a side of the second substrate away from the first substrate;
the blue light filtering film is located between the second substrate and the backlight module, or the blue light filtering film is located on one side of the second substrate close to the first substrate, or the blue light filtering film is located on one side of the first substrate close to the second substrate or on one side of the first substrate far away from the second substrate.
4. The display module of claim 3, wherein the liquid crystal between the first substrate and the second substrate has a retardation of A ≦ 320 nm.
5. The display module of claim 1, wherein the light-transmissive area of the blue sub-pixel is larger than the light-transmissive area of the red sub-pixel, and the light-transmissive area of the blue sub-pixel is larger than the light-transmissive area of the green sub-pixel.
6. The display module of claim 5, wherein the light-transmissive area of the green sub-pixel is larger than the light-transmissive area of the red sub-pixel and smaller than the light-transmissive area of the blue sub-pixel.
7. The display module of claim 1, wherein the backlight module comprises a substrate and a light emitting diode disposed on the substrate, and the dominant wavelength of the light emitting diode is λ6Wherein λ is6≥455nm。
8. The display module of claim 7, wherein the light emitting diode comprises phosphor having a wavelength λ7Wherein λ is7＝(565±5)nm。
9. The display module of claim 1, wherein the blue light filtering membrane comprises sequentially arranged TiO2Layer, Y2O3Layer and SiO2Layer of said SiO2A layer disposed on the Y2O3The layer is close to one side of the backlight module, or, the SiO2A layer disposed on the Y2O3The layer is far away from one side of the backlight module.
10. The display module according to claim 3, wherein the second substrate comprises a driving functional layer and an electrode layer which are sequentially arranged in a direction perpendicular to a plane where the display module is located, the driving functional layer comprises a plurality of thin film transistors arranged in an array, and the electrode layer comprises a first electrode layer, an insulating layer and a second electrode layer which are sequentially arranged; the second electrode layer comprises a plurality of second electrodes, and at least part of the second electrodes are electrically connected with the drain electrodes of the thin film transistors in a one-to-one correspondence mode.
11. A display device comprising the display module of any one of claims 1 to 10.
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| CN111445864A (en) * | 2020-05-15 | 2020-07-24 | 京东方科技集团股份有限公司 | Display module, brightness adjusting method and display device |
| CN115148165B (en) * | 2022-04-18 | 2023-06-27 | 深圳市华星光电半导体显示技术有限公司 | Display screen adjusting method and device, display device and storage medium |
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