TWI691765B - Display apparatus - Google Patents

Abstract

A display apparatus includes a display panel, a light source, a phosphor film and a quantum dot film. The phosphor film and the quantum dot film are disposed between the light source and the display panel. The phosphor powder film has phosphor powders, and the weight percentage of the phosphor powders of the phosphor powder film is Cp, and 10%≤Cp≤25%. A thickness of the quantum dot film is T1, and 80 μm ≤ T1 ≤ 120 μm. The quantum dot film has a perovskite quantum dot material, and the weight percentage of the perovskite quantum dot material of the quantum dot film is Cq, and 0.7%≤Cq≤1.2%.

Description

Display device

The present invention relates to a display device, and particularly to a display device including perovskite quantum dot materials.

Quantum dots are semiconductor nanostructures that bind internal electrons in three spatial directions. This constraint can be attributed to the electrostatic potential, the interface between two different semiconductor materials, the surface of the semiconductor, or a combination of the three. Therefore, quantum dots have unique photoelectric characteristics. For example, when quantum dots receive excitation light, they emit high-purity monochromatic light in various colors according to their diameters. Quantum dot materials are often used in display devices.

The invention provides a display device which has both high brightness and high color coverage.

λ₀

535nm，且綠光之光譜的半高寬小於或等於25nm。 A display device of the present invention includes a display panel, a light source, a phosphor powder film and a quantum dot film. The display panel includes a first substrate, a second substrate disposed opposite to the first substrate, a non-self-luminous display medium disposed between the first substrate and the second substrate, and a color disposed on the first substrate or the second substrate Filter layer. The color filter layer has a first color pattern, a second color pattern, and a third color pattern. The light source emits a first color light, and the first color light is converted into a first mixed color light after passing through one of the phosphor powder film and the quantum dot film. The first mixed color light is converted into the second mixed color light after passing through the other of the phosphor powder film and the quantum dot film. The second mixed color light includes green light, and the spectrum of the green light has a peak, and the wavelength corresponding to the peak is λ ₀ , 520 nm

λ ₀

535nm, and the half-height width of the spectrum of green light is less than or equal to 25nm.

A display device of the present invention includes a display panel, a light source, a reflector, and a wavelength conversion film. The display panel includes a first substrate, a second substrate disposed opposite to the first substrate, a non-self-luminous display medium disposed between the first substrate and the second substrate, and a color disposed on the first substrate or the second substrate Filter layer. The color filter layer has a first color pattern, a second color pattern, and a third color pattern. The wavelength conversion film has phosphor powder and perovskite quantum dot materials. The wavelength conversion film is disposed between the display panel and the reflector, and is separated from the light source. The light source emits the first color light, and the first color light is converted into a mixed color light after passing through the wavelength conversion film.

In order to make the above-mentioned features and advantages of the present invention more obvious and understandable, the embodiments are specifically described below in conjunction with the accompanying drawings for detailed description as follows.

10, 10A, 20, 20A, 30, 30A, 40, 40A: display device

100: display panel

110: the first substrate

120: second substrate

130: non-self-luminous display medium

140: color filter layer

140R: the first color pattern

140G: second color pattern

140B: third color pattern

150: pixel array layer

160, 170: polarizer

200: backlight module

210: light source

211: LED chip

212: package

220: phosphor powder film

221, 251, 291: transparent substrate

222: phosphor

230: reflector

240: light guide plate

241: first surface

242: Second surface

243: Side

250: quantum dot film

252: Perovskite quantum dot material

260: Diffuser

270: Lo film

280: Brightening film

290: Wavelength conversion film

FWHM: full width at half maximum

L0: first color light

L1, L2: mixed shades

S _LED , Sp, Sq, S _CFR, S _CFG and S _CFB : Curve

S ₁₀ , S _{Rec. 2020} : line segment

T1, T2: thickness

λ ₀ : wavelength

FIG. 1 is a schematic diagram of a display device 10 according to an embodiment of the invention.

2 shows the spectrum of the first color light L0 of the light-emitting diode chip 211, the spectrum of the second color light converted by the phosphor powder 220, and the quantum dots according to an embodiment of the present invention. The spectrum of the third color light converted by the film 250, the transmission spectrum of the first color pattern 140R, the transmission spectrum of the second color pattern 140G, and the transmission spectrum of the third color pattern 140B.

3 is a CIE 1976 chromaticity diagram, where line segment S ₁₀ represents the color gamut of the display device 10 according to an embodiment of the present invention, and line segment S _{Rec. 2020} represents the standard color gamut of Rec. 2020.

FIG. 4 is a schematic diagram of a display device 10A according to another embodiment of the invention.

FIG. 5 is a schematic diagram of a display device 20 according to another embodiment of the invention.

FIG. 6 is a schematic diagram of a display device 20A according to still another embodiment of the invention.

7 is a schematic diagram of a display device 30 according to an embodiment of the invention.

FIG. 8 is a schematic diagram of a display device 30A according to another embodiment of the invention.

9 is a schematic diagram of a display device 40 according to another embodiment of the invention.

FIG. 10 is a schematic diagram of a display device 40A according to still another embodiment of the invention.

Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the drawings. Wherever possible, the same element symbols are used in the drawings and description to denote the same or similar parts.

It should be understood that when an element such as a layer, film, region, or substrate is referred to as being “on” or “connected to” another element, it can be directly on or connected to the other element, or Intermediate elements may also be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. As used herein, "connected" may refer to physical and/or electrical connections. Furthermore, "electricity "Sexual connection" or "coupling" means that there are other elements between the two elements.

As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation range for a particular value determined by one of ordinary skill in the art, taking into account the measurements and A certain amount of measurement-related errors (ie, measurement system limitations). For example, "about" may mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, "about", "approximately", or "substantially" can be based on optical properties, etching properties, or other properties to select a more acceptable range of deviation or standard deviation, and not one standard deviation can be applied to all properties .

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by those of ordinary skill in the art to which this invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant technology and the present invention, and will not be interpreted as idealized or excessive Formal meaning unless explicitly defined as such in this article.

FIG. 1 is a schematic diagram of a display device 10 according to an embodiment of the invention. Referring to FIG. 1, the display device 10 includes a display panel 100. The display panel 100 includes a first substrate 110, a second substrate 120, a non-self-luminous display medium 130, and a color filter layer 140. The second substrate 120 is disposed opposite to the first substrate 110. The non-self-luminous display medium 130 is disposed between the first substrate 110 and the second substrate 120. The color filter layer 140 is disposed on the first substrate 110 or the second substrate 120.

For example, in this embodiment, the non-self-luminous display medium 130 may It is liquid crystal, and the first substrate 110 and the second substrate 120 may be provided with a polarizer 160 and a polarizer 170, respectively, but the invention is not limited thereto. In this embodiment, the color filter layer 140 has a first color pattern 140R, a second color pattern 140G, and a third color pattern 140B. For example, the first color pattern 140R, the second color pattern 140G, and the third color pattern 140B may be a red pattern, a green pattern, and a blue pattern, respectively, but the invention is not limited thereto.

The display panel 100 further includes a pixel array layer 150 for driving the non-self-luminous display medium 130. For example, in this embodiment, the pixel array layer 150 and the color filter layer 140 can be selectively disposed on the first substrate 110 and the second substrate 120, respectively. However, the present invention is not limited to this. According to other embodiments, the pixel array layer 150 and the color filter layer 140 may also be disposed on the same substrate, that is, the pixel array layer 150 and the color filter layer 140 may also be disposed on On the first substrate 110 or the second substrate 120.

In addition to the display panel 100, the display device 10 further includes a backlight module 200. The backlight module 200 includes a light source 210. In this embodiment, the light source 210 may optionally include a light-emitting diode chip 211 and a package 212, wherein the light-emitting diode chip 211 is disposed in the package 212. The light source 210 is used to emit the first color light L0. For example, in this embodiment, the first color light L0 includes a blue light.

The backlight module 200 further includes a phosphor powder film 220. The phosphor film 220 has a light-transmitting substrate 221 and a phosphor 222 mixed in the light-transmitting substrate 221. The phosphor film 220 is substantially disposed between the light source 210 and the display panel 100. For example, in this embodiment, the phosphor film 220 can be selectively disposed on the light-emitting diode chip 211, and the light-emitting diode chip 211 and the phosphor film 220 are both disposed in the package body 212. That is, in this embodiment, the phosphor film 220, the light-emitting diode chip 211, and the package 212 can be integrated into a light-emitting device. However, the present invention is not limited to this. According to other embodiments, the phosphor film 220 may also be disposed at other suitable positions. The following paragraphs will illustrate with other drawings.

The light source 210 emits the first color light L0, and the first color light L0 is converted into the first mixed color light L1 through one of the phosphor powder film 220 and the quantum dot film 250. For example, in this embodiment, the first color light L0 emitted by the light-emitting diode chip 211 passes through the phosphor film 220 and is converted into the first mixed color light L1. In detail, after the first color light L0 passes through the phosphor film 220, part of the first color light L0 (for example: blue light) is converted into the second color light (for example: red light; not shown) by the phosphor powder 222, The other part of the first color light L0 is not converted to maintain the original color (for example: blue), the converted second color light (for example: red light) and the other part of the first color light L0 (not converted) For example: blue light) mixed into the first mixed color light L1 (for example: magenta light).

For example, in this embodiment, the material of the transparent substrate 221 of the phosphor film 220 may be resin; the material of the phosphor powder 222 may be potassium fluorosilicate (KSF) phosphor. However, the invention is not limited to this. The material of the transparent substrate 221 and/or the material of the phosphor 222 may also be other suitable materials.

The backlight module 200 further includes a quantum dot film 250. The quantum dot film 250 is roughly disposed between the light source 210 and the display panel 100. In this embodiment, the backlight module 200 further includes a reflector 230, wherein the quantum dot film 250 is disposed between the display panel 100 and the reflector 230.

For example, in this embodiment, the backlight module 200 can optionally include Include light guide plate 240. The light guide plate 240 has a first surface 241, a second surface 242, and a side surface 243, wherein the first surface 241 is closer to the display panel 100 than the second surface 242, the side surface 243 is connected between the first surface 241 and the second surface 242, and the light source 210 is disposed beside the side 243 of the light guide plate 240. In other words, the backlight module 200 of this embodiment may be an edge-lit backlight module. In the edge-lit backlight module, the quantum dot film 250 can be disposed on the first surface 241 of the light guide plate 240, but the invention is not limited thereto.

In this embodiment, in addition to the quantum dot film 250, the backlight module 200 may further include other optical films. For example, in this embodiment, the other optical films of the backlight module 200 may include a diffusion sheet 260, and the quantum dot film 250 may be selectively disposed between the diffusion sheet 260 and the light guide plate 240. In addition, in the present embodiment, the other optical films of the backlight module 200 may further include a thin film 270 and a brightness enhancement film 280, wherein the diffusion film 260, the thin film 270 and the brightness enhancement film 280 may be sequentially stacked on the light guide plate 240 On the first surface 241.

It should be noted that the type, number and arrangement of the optical films included in the backlight module 200 are only used to illustrate the present invention but not to limit the present invention. The optical films included in the backlight module 200 The type, number and arrangement of the slices can be designed according to actual needs. In addition, the location of the quantum dot film 250 is not limited to between the diffusion sheet 260 and the light guide plate 240; on the premise that the quantum dot film 250 is not easily overly affected by the waste heat generated by the light source 210, the quantum dot film 250 can also be installed in other Niche.

The quantum dot film 250 has a light-transmitting substrate 251 and a perovskite quantum dot material 252 mixed in the light-transmitting substrate 251. The first mixed color light L1 passes through the other of the phosphor powder film 220 and the quantum dot film 250 and is then converted into the second mixed color light L2. In this embodiment, the first mixed color light L1 is converted into the second mixed color light L2 after passing through the quantum dot film 250. Specifically, after the first mixed light L1 passes through the quantum dot film 250, part of the first mixed color light L1 (for example: magenta light) is converted into third color light (for example: green light; not shown) by the phosphor 222. , The other part of the first mixed color light L1 is not converted to maintain the original color (for example: magenta), the converted third color light (for example: green light) and the other part of the first mixed color light L1 that is not converted (For example: magenta light) mixed into the second mixed color light L2 (for example: white light). For example, in this embodiment, the perovskite quantum dot material 252 may be a compound represented by CsPbBr ₃ , but the present invention is not limited thereto.

2 shows the spectrum of the first color light L0 of the light-emitting diode chip 211, the spectrum of the second color light converted by the phosphor powder film 220, and the third spectrum of the quantum dot film 250 according to an embodiment of the present invention. The spectrum of colored light, the transmission spectrum of the first color pattern 140R, the transmission spectrum of the second color pattern 140G, and the transmission spectrum of the third color pattern 140B are respectively represented by curve S _LED , curve S _p , curve S _q , curve S _CFR, curve S _CFG and curve S _CFB .

3 is a CIE 1976 chromaticity diagram, where line segment S ₁₀ represents the color gamut of the display device 10 according to an embodiment of the present invention, and line segment S _{Rec. 2020} represents the standard color gamut of Rec. 2020.

The following table 1 lists the weight percentage Cp of the phosphor powder 222 of various phosphor powder films 220 and the weight percentage of the perovskite quantum dot material 252 of various quantum dot films 250 The white point color coordinates (Wx, Wy) and brightness of the display device 10 according to an embodiment of the present invention obtained under the conditions of Cq and the thickness T1 of various quantum dot films 250.

Table 2 below shows the optical data of the display device 10 according to an embodiment of the present invention and the display devices of Comparative Examples 1 to 3.

λ₀

535nm，且第三色光之光譜的半高寬FWHM小於或等於25nm；螢光粉膜220之螢光粉222的重量百分比為Cp，而10%

Cp

25%；量子點膜250的厚度為T1，而80μm

T1

120μm；量子點膜250之鈣鈦礦量子點材料252的重量百分比為Cq，而0.7%

Cq

1.2%。藉此，顯示裝置10能在具有符合規範之白點色座標(即Wx=0.31±0.01及Wy=.0.33±0.01)的前提下兼具高色彩覆蓋率及高亮度。 Please refer to FIG. 1, FIG. 2, FIG. 3, Table 1 and Table 2 below, the spectrum S _q of the third colored light (for example: green light) converted by the quantum dot film 250 has a peak, and the wavelength corresponding to the peak is λ ₀ , 520nm

λ ₀

535nm, and the half-width FWHM of the spectrum of the third color light is less than or equal to 25nm; the weight percentage of the phosphor 222 of the phosphor film 220 is Cp, and 10%

Cp

25%; the thickness of the quantum dot film 250 is T1, and 80μm

T1

120μm; the weight percentage of the perovskite quantum dot material 252 of the quantum dot film 250 is Cq, and 0.7%

Cq

1.2%. In this way, the display device 10 can have both high color coverage and high brightness under the premise of having white point color coordinates (ie, Wx=0.31±0.01 and Wy=.0.33±0.01) that meet the specifications.

=525nm，且第三色光之光譜的半高寬FWHM=22nm，螢光粉膜220之螢光粉222的重量百分比Cp=18%，量子點膜250之鈣鈦礦量子點材料252的重量百分比Cq=0.7%，量子點膜250的厚度T1=87μm，而顯示裝置10能在具有符合規範之白點色座標(即Wx=0.3000及Wy=0.3346)的前提下兼具高色彩覆蓋率90.3%及高亮度411.1nit，但本發明不以此為限。 Please refer to FIG. 1, Table 1 and Table 2 below. For example, in a preferred embodiment, the spectrum S _q of the third color light (for example, green light) converted by the quantum dot film 250 has a peak, The wavelength corresponding to the peak is λ ₀ , λ ₀

=525nm, and the half-height width FWHM of the spectrum of the third color light=22nm, the weight percentage of phosphor powder 222 of phosphor film 220 is 18%, and the weight percentage of quantum dot film 250 is perovskite quantum dot material 252 Cq=0.7%, the thickness of the quantum dot film 250 is T1=87μm, and the display device 10 can have a high color coverage rate of 90.3% under the premise of having white point color coordinates (ie, Wx=0.3000 and Wy=0.3346) that meet the specifications. And high brightness 411.1nit, but the invention is not limited to this.

Please refer to FIG. 1 and Table 2 below. The display device of Comparative Example 1 is similar to the display device 10 of this embodiment. The difference between the two is that the display device of Comparative Example 1 uses red phosphor (for example: KSF) and Green fluorescent powder (for example: β-SiAlON) is mixed and placed in the package body 212, and the display device of Comparative Example 1 does not include the quantum dot film 250 of this embodiment; the display devices of Comparative Examples 2 and 3 and this embodiment Similar to the display device 10, the difference is that the display devices of Comparative Example 2 and Comparative Example 3 mix the green quantum dot material and the red phosphor in the same film material and arrange the film material outside the package body 212, The green quantum dot material of Comparative Example 2 includes cadmium (Cd), and the green quantum dot material of Comparative Example 3 includes indium phosphide (InP).

The experimental data in Table 2 below proves that, compared to Comparative Example 1, Comparative Example 2, or Comparative Example 3, the display device 10 of this embodiment can be used under the premise of having white point color coordinates (0.3000, 0.3346) that meet the specifications. With high optical efficiency of 104% and high color coverage of 90.3%.

It must be noted here that the following embodiments follow the element numbers and partial contents of the foregoing embodiments, wherein the same reference numbers are used to indicate the same or similar elements, and the description of the same technical content is omitted. For the description of the omitted parts, reference may be made to the foregoing embodiments, and the following embodiments will not be repeated.

FIG. 4 is a schematic diagram of a display device 10A according to another embodiment of the invention. Please refer to FIGS. 1 and 4, the display device 10 of FIG. 1 is similar to the display device 10A of FIG. 4, the difference between the two is that: the backlight module 200 of the display device 10 of FIG. 1 is a side entry type, and the display device of FIG. 4 The backlight module 200 of 10A is a direct type, and the position of the quantum dot film 250 of FIG. 4 is different from the position of the quantum dot film 250 of FIG. 1.

Please refer to FIG. 4. Specifically, in this embodiment, the light source 210 is disposed between the diffusion sheet 260 and the reflector 230, and the quantum dot film 250 is disposed on the diffusion sheet 260 and is located between the display panel 100 and the diffusion sheet 260 .

FIG. 5 is a schematic diagram of a display device 20 according to another embodiment of the invention. Please refer to FIGS. 1 and 5. The display device 20 of FIG. 5 is similar to the display device 10 of FIG. 1. The difference between the two is that in the embodiment of FIG. 5, the phosphor powder 220 is separated from the light source 210, while the fluorescent light The powder film 220 and the quantum dot film 250 are two independent film materials. In this embodiment, the quantum dot film 250 and the phosphor powder film 220 are disposed between the display panel 100 and the reflector 230, and the quantum dot film 250 and the phosphor powder film 220 are disposed on the first surface 241 of the light guide plate 240. Moreover, the quantum dot film 250 and the phosphor powder film 220 may be located between the diffusion sheet 260 and the light guide plate 240.

FIG. 6 is a schematic diagram of a display device 20A according to still another embodiment of the invention. 5 and 6, the display device 20 of FIG. 5 is similar to the display device 20A of FIG. 6, the difference between the two is that the backlight module 200 of the display device 20 of FIG. 5 is a side-entry type, and the display device of FIG. 6 The backlight module 200 of 20A is a direct type, and the positions of the quantum dot film 250 and the phosphor film 220 of FIG. 6 are different from the positions of the quantum dot film 250 and the phosphor film 220 of FIG. 5.

Please refer to FIG. 6. Specifically, in this embodiment, the light source 210 is disposed between the diffusion sheet 260 and the reflector 230, and the quantum dot film 250 and the phosphor film 220 are disposed on the diffusion sheet 260 and are located on the display panel 100 With diffusion sheet 260.

7 is a schematic diagram of a display device 30 according to an embodiment of the invention. 5 and 7, the display device 20 of FIG. 5 is similar to the display device 30 of FIG. 7, both The differences are as follows. In the embodiment of FIG. 5, the phosphor film 220 is disposed between the quantum dot film 250 and the reflector 230. However, in the embodiment of FIG. 7, the quantum dot film 250 is disposed between the phosphor film 220 and the reflector 230.

FIG. 8 is a schematic diagram of a display device 30A according to another embodiment of the invention. Please refer to FIGS. 6 and 8. The display device 20A of FIG. 6 is similar to the display device 30A of FIG. 8, and the difference between the two is as follows. In the embodiment of FIG. 6, the phosphor film 220 is disposed between the quantum dot film 250 and the reflector 230. However, in the embodiment of FIG. 8, the quantum dot film 250 is disposed between the phosphor film 220 and the reflector 230.

9 is a schematic diagram of a display device 40 according to another embodiment of the invention. Please refer to FIGS. 1 and 9, the display device 10 of FIG. 1 is similar to the display device 40 of FIG. 9, the difference between the two is that: in the embodiment of FIG. 9, the phosphor 222 and the perovskite quantum dot material 252 series It is mixed in a transparent substrate 291 to form a wavelength conversion film 290. The wavelength conversion film 290 is disposed between the display panel 100 and the reflector 230, and is separated from the light source 210.

The light source 210 emits the first color light L0 (for example, blue light), and the first color light L0 is converted into the second color light (for example, red light) by the phosphor 222 and the perovskite quantum dot material 252 after passing through the wavelength conversion film 290, respectively ; Not shown) and the third color light (for example: green light; not shown), the second color light (for example: red light; not shown) and the third color light (for example: green light; not shown) are mixed into a mixture Colored light L2 (for example: white light).

Cp

25%；波長轉換膜290的厚度為T2，而80μm

T2

120μm；波長轉換膜290之鈣鈦礦量子點材料252的 重量百分比為Cq，而0.7%

Cq

1.2%；混合色光L2包括一綠光，綠光的光譜具有波峰，所述波峰對應的波長為λ₀，520nm

λ₀

535nm，且所述綠光之光譜的半高寬小於或等於25nm。 Similar to the embodiment of FIG. 1, the weight percentage of the phosphor 222 of the wavelength conversion film 290 is Cp, and 10%

Cp

25%; the thickness of the wavelength conversion film 290 is T2, and 80μm

T2

120μm; the weight percentage of the perovskite quantum dot material 252 of the wavelength conversion film 290 is Cq, and 0.7%

Cq

1.2%; the mixed color light L2 includes a green light, the spectrum of the green light has a peak, and the wavelength corresponding to the peak is λ ₀ , 520 nm

λ ₀

535nm, and the half-height width of the spectrum of the green light is less than or equal to 25nm.

FIG. 10 is a schematic diagram of a display device 40A according to still another embodiment of the invention. 9 and 10, the display device 40 of FIG. 9 is similar to the display device 40A of FIG. 10, the difference between the two is that the backlight module 200 of the display device 40 of FIG. 9 is a side-entry type, and the display device of FIG. 10 The backlight module 200 of 40A is a direct type, and the position of the wavelength conversion film 290 in FIG. 9 is different from the position of the wavelength conversion film 290 in FIG. 12.

Specifically, in the embodiment of FIG. 9, the wavelength conversion film 290 may be selectively disposed on the first surface 241 of the light guide plate 240, and the wavelength conversion film 290 is located between the display panel 100 and the light guide plate 240; In the embodiment of 10, the light source 210 is disposed between the diffusion sheet 260 and the reflector 230, and the wavelength conversion film 290 is disposed on the diffusion sheet 260 and is located between the display panel 100 and the diffusion sheet 260.

The display devices 10A, 20, 20A, 30, 30A of FIGS. 4 to 10 have similar functions and advantages as the display device 10 of FIG. 1 and will not be repeated here.

Although the present invention has been disclosed as above with examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to the scope defined in the appended patent application.

10: display device

100: display panel

110: the first substrate

120: second substrate

130: non-self-luminous display medium

140: color filter layer

140R: the first color pattern

140G: second color pattern

140B: third color pattern

150: pixel array layer

160, 170: polarizer

200: backlight module

210: light source

211: LED chip

212: package

220: phosphor powder film

221, 251: transparent substrate

222: phosphor

230: reflector

240: light guide plate

241: first surface

242: Second surface

243: Side

250: quantum dot film

252: Perovskite quantum dot material

260: Diffuser

270: Lo film

280: Brightening film

L0: first color light

L1, L2: mixed shades

T1: thickness

Claims (4)

A display device includes: a display panel, including: a first substrate; a second substrate, disposed opposite to the first substrate; a non-self-luminous display medium, disposed on the first substrate and the second substrate Between; and a color filter layer, disposed on the first substrate or the second substrate, and has a first color pattern, a second color pattern and a third color pattern; a light source; a reflector; And a wavelength conversion film with a phosphor and a perovskite quantum dot material, wherein the wavelength conversion film is disposed between the display panel and the reflector, and is separated from the light source; the light source emits a first color Light, and the first color light is converted into a mixed color light after passing through the wavelength conversion film. The display device as described in item 1 of the patent application range, wherein the weight percentage of the phosphor of the wavelength conversion film is Cp, and 10%

Cp

25%; the thickness of the wavelength conversion film is T2, and 80μm

T2

120μm; the weight percentage of the perovskite quantum dot material of the wavelength conversion film is Cq, and 0.7%

Cq

1.2%; the mixed color light includes a green light, a spectrum of the green light has a peak, and the wavelength corresponding to the peak is λ ₀ , 520 nm

λ ₀

535nm, and the half-height width of the spectrum of the green light is less than or equal to 25nm. The display device as described in item 1 of the patent application scope further includes: A light guide plate has a first surface, a second surface and a side surface, wherein the first surface is closer to the display panel than the second surface, the side surface is connected between the first surface and the second surface, the The light source is disposed beside the side of the light guide plate, and the wavelength conversion film is disposed on the first surface of the light guide plate. The display device according to item 1 of the patent application scope further includes: a diffusion sheet, wherein the light source is disposed between the diffusion sheet and the reflector, and the wavelength conversion film is disposed on the diffusion sheet.

Images