Backlight, backlight module, display device and control method of display device

Abstract

The application discloses a backlight light source, a backlight module, a display device and a control method of the display device, and relates to the technical field of display. The backlight light source comprises a first light source, the first light source comprises a first blue light chip and a first light conversion part. The first light conversion part is arranged at least partially on an light-out path of the first blue light chip, and the first light conversion part comprises yellow fluorescent powder, red fluorescent powder and cyan fluorescent powder. Overall, the white light emitted by the first light source has a large spectral range, can be close to the spectrum of natural light, and has a good eye protection effect. When the first light source is used as the backlight light source of the display device, the spectral range of the light passing through the optical filter of the display device is larger, the eye protection effect is enhanced, the time for a user to enter an eye fatigue state is prolonged when the user watches a picture, and the user is not prone to entering the eye fatigue state.

Description

Technical Field

[0001] This invention relates to the field of display technology, and in particular to a backlight source, a backlight module, a display device, and a control method for the display device. Background Technology

[0002] Common display devices, such as televisions, often use red, green, and blue LED chips as their backlight source. These chips emit red, green, and blue light respectively. The three colors of light are mixed to form white light, which is then filtered by liquid crystal glass to form the image. These display devices have relatively poor eye protection; users experience eye fatigue relatively quickly when viewing the screen. Summary of the Invention

[0003] The main objective of this invention is to provide a backlight source, a backlight module, a display device, and a control method for the display device, which aims to extend the time it takes for a user to enter a state of eye fatigue.

[0004] To achieve the above objectives, the present invention proposes a backlight source, comprising a first light source, wherein the first light source includes: The first Blu-ray chip; and, The first light conversion unit is at least partially disposed on the light output path of the first blue light chip, and the first light conversion unit includes yellow phosphor, red phosphor and cyan phosphor.

[0005] In one embodiment, the first light conversion unit has a color index of Ra95; and / or, The emission wavelength of the yellow phosphor is set to λ1, where 548nm ≤ λ1 ≤ 568nm; and / or, The emission wavelength of the red phosphor is set to λ2, where 635nm ≤ λ2 ≤ 655nm; and / or, The emission wavelength of the cyan phosphor is set to λ3, where 475nm ≤ λ3 ≤ 495nm.

[0006] In one embodiment, the backlight source further includes a second light source, the second light source comprising: The second blue light chip is used to emit blue light; A green light chip, used to emit green light; and, The red light-emitting part is used to emit red light.

[0007] The red light-emitting part includes a red light chip; or... The red light-emitting part includes a red light conversion part, which is at least partially located on the light output path of the second blue light chip.

[0008] In one embodiment, the backlight source further includes a bracket, and both the first light source and the second light source are disposed on the bracket.

[0009] In one embodiment, the bracket has a first mounting groove, and at least a portion of the first light source is disposed in the first mounting groove; and / or, The bracket has a second mounting groove, and at least a portion of the second light source is disposed in the second mounting groove.

[0010] In one embodiment, multiple versions of both the first and second light sources are provided, and the backlight source further includes a light strip plate, wherein: Any one of the first light sources and any one of the second light sources are spaced apart on the light strip plate; and / or, Multiple first light sources and multiple second light sources are alternately arranged on the light strip plate.

[0011] The present invention also proposes a backlight module, including the aforementioned backlight source.

[0012] The backlight source includes a first light source, the first light source comprising: The first Blu-ray chip; and, The first light conversion unit is at least partially disposed on the light output path of the first blue light chip, and the first light conversion unit includes yellow phosphor, red phosphor and cyan phosphor.

[0013] The present invention also proposes a display device including the aforementioned backlight module.

[0014] The backlight module includes the backlight source.

[0015] The backlight source includes a first light source, the first light source comprising: The first Blu-ray chip; and, The first light conversion unit is at least partially disposed on the light output path of the first blue light chip, and the first light conversion unit includes yellow phosphor, red phosphor and cyan phosphor.

[0016] In one embodiment, the display device further includes a filter, the filter being configured as a circular polarizer; and / or, The display device further includes a main control chip, a first light control chip, and a second light control chip. The main control chip is electrically connected to the first light control chip and the second light control chip. The first light control chip is electrically connected to the first blue light chip. The backlight source further includes a second light source. The second light control chip is electrically connected to the second light source.

[0017] The present invention also proposes a control method for a display device, based on the aforementioned display device, which includes the aforementioned backlight module.

[0018] The backlight module includes the backlight source.

[0019] The backlight source includes a first light source, the first light source comprising: The first Blu-ray chip; and, The first light conversion unit is at least partially disposed on the light output path of the first blue light chip, and the first light conversion unit includes yellow phosphor, red phosphor and cyan phosphor.

[0020] The backlight source also includes a second light source, which includes a second blue light chip, a green light chip, and a red light-emitting part. The control method includes the following steps: Get display mode parameters; Determine the light emission control parameters based on the display mode parameters; The first light source and the second light source emit light using the light emission control parameters.

[0021] In the technical solution of this invention, after the first blue light chip is activated, the first blue light chip emits light. A portion of the blue light from the first blue light chip can avoid the first light conversion section, or a portion of the blue light from the first blue light chip can pass through the first light conversion section, ensuring that the first light source emits blue light, thereby ensuring the spectrum of the first light source in the blue light region. After the blue light from the first blue light chip enters the first light conversion section, the yellow phosphor can absorb a portion of the violet light and emit yellow light, causing the first light source to emit yellow light, thereby ensuring the spectrum of the first light source in the yellow light region and adjacent color regions. The red phosphor can absorb a portion of the violet light and emit red light, causing the first light source to emit red light, thereby ensuring the spectrum of the first light source in the red light region and adjacent color regions. The cyan phosphor can absorb a portion of the violet light and emit cyan light, causing the first light source to emit cyan light, thereby ensuring the spectrum of the first light source in the cyan light region and adjacent color regions. Overall, the white light emitted by the first light source has a large spectral range, which is close to the spectrum of natural light and has a good eye protection effect. When the first light source is used as the backlight source of the display device, the spectral range of the light passing through the filter of the display device is larger, which enhances the eye protection effect. When the user is watching the screen, the time it takes for the user to enter a state of eye fatigue is extended, that is, the user is less likely to enter a state of eye fatigue. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of an embodiment of the backlight source provided by the present invention; Figure 2 for Figure 1 A cross-sectional view at point AA along the middle edge; Figure 3 for Figure 1 A partial structural diagram of the backlight source; Figure 4 A schematic diagram of another embodiment of the backlight source provided by the present invention; Figure 5 for Figure 4 A cross-sectional view at the middle edge BB; Figure 6 for Figure 4 A partial structural diagram of the backlight source; Figure 7 This is a schematic diagram of another embodiment of the backlight source provided by the present invention.

[0024] Explanation of icon numbers: 1. First light source; 11. First blue light chip; 12. First light conversion unit; 2. Second light source; 21. Second blue light chip; 22. Green light chip; 23. Red light-emitting unit; 231. Red light chip; 232. Red light conversion unit; 3. Bracket; 31. First mounting slot; 32. Second mounting slot; 4. Light strip plate.

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] Common display devices, such as televisions, often use red, green, and blue LED chips as their backlight source. These chips emit red, green, and blue light respectively. The three colors of light are mixed to form white light, which is then filtered by liquid crystal glass to form the image. These display devices have relatively poor eye protection; users experience eye fatigue relatively quickly when viewing the screen.

[0030] This invention proposes a backlight source.

[0031] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the backlight source includes a first light source 1, which includes a first blue light chip 11 and a first light conversion unit 12. The first light conversion unit 12 is at least partially disposed on the light emission path of the first blue light chip 11, and the first light conversion unit 12 includes yellow phosphor, red phosphor, and cyan phosphor.

[0032] The first blue light chip 11 is a light-emitting chip that emits blue light when powered on. The yellow phosphor, the red phosphor, and the cyan phosphor absorb blue light when irradiated, and convert the blue light into light of the corresponding color and emit it. The phosphor has a large bandwidth, and broadband phosphors can be selected to ensure that the emitted light has a large bandwidth, thereby resulting in a wide spectral range of the emitted light. The types of yellow, red, and cyan phosphors can be set as needed and are not limited here. Specifically, by selecting appropriate yellow, red, and cyan phosphors, the spectrum of the emitted light from the red phosphor can cover part of the orange region. Similarly, the spectrum of the emitted light from the yellow phosphor can cover part of the orange and green regions, and the spectrum of the emitted light from the cyan phosphor can cover part of the blue and green regions. The blue, yellow, cyan, and red light combine to form equivalent white light, and the spectrum of the equivalent white light emitted by the first light source 1 is a combination of the corresponding blue, yellow, cyan, and red light.

[0033] The first light conversion unit 12 is at least partially disposed on the light emission path of the first blue light chip 11. This means that the first light conversion unit 12 can be partially located on the light emission path of the first blue light chip 11, so that some blue light is staggered from the first light conversion unit 12. Alternatively, the first light conversion unit 12 can be entirely disposed on the light emission path of the first blue light chip 11, so that all blue light emitted from the first blue light chip 11 passes through the first light conversion unit 12. This is not limited here. Specifically, the first light conversion unit 12 is disposed on the light emission path of the first blue light chip 11.

[0034] In the technical solution of this invention, after the first blue light chip 11 is activated, the first blue light chip 11 emits light. A portion of the blue light from the first blue light chip 11 can avoid the first light conversion unit 12, or a portion of the blue light from the first blue light chip 11 can pass through the first light conversion unit 12, ensuring that the first light source 1 emits blue light, thereby ensuring the spectrum of the first light source 1 in the blue light region. After the blue light from the first blue light chip 11 enters the first light conversion unit 12, the yellow phosphor can absorb a portion of the violet light and emit yellow light, causing the first light source 1 to emit yellow light, thereby ensuring the spectrum of the first light source 1 in the yellow light region and adjacent color regions. The red phosphor can absorb a portion of the violet light and emit red light, causing the first light source 1 to emit red light, thereby ensuring the spectrum of the first light source 1 in the red light region and adjacent color regions. The cyan phosphor can absorb a portion of the violet light and emit cyan light, causing the first light source 1 to emit cyan light, thereby ensuring the spectrum of the first light source 1 in the cyan light region and adjacent color regions. Overall, the white light emitted by the first light source 1 has a large spectral range, which is close to the spectrum of natural light and has a good eye protection effect. When the first light source 1 is used as the backlight source of the display device, the spectral range of the light passing through the filter of the display device is larger, which enhances the eye protection effect. When the user is watching the screen, the time it takes for the user to enter a state of eye fatigue is extended, that is, the user is less likely to enter a state of eye fatigue.

[0035] Within the first light conversion unit 12, the yellow phosphor, the red phosphor, and the cyan phosphor can be mixed and disposed. The first light conversion unit 12 can have multiple regions, such as yellow regions, red regions, and cyan regions, wherein the yellow regions contain only yellow phosphor, the red regions contain only red phosphor, and the cyan regions contain only cyan phosphor. Other types of phosphors can also be disposed within the first light conversion unit 12 to increase the spectral coverage of the first light source 1.

[0036] In one embodiment of the present invention, the first light conversion unit 12 has a color rendering index (CRI) of Ra95. Ra95 means that when D65 standard daylight is set to Ra100, the general CRI is 100. The general CRI of the first light conversion unit 12 in this application is 95, ensuring that the emitted light from the first light conversion unit 12 is close to natural light, which is more eye-friendly. Specifically, the components of the first light conversion unit 12 can be configured as needed to achieve a CRI of Ra95, and are not limited here.

[0037] The yellow phosphor has an emission wavelength of 558 nm, the red phosphor has an emission wavelength of 645 nm, and the cyan phosphor has an emission wavelength of 485 nm, which ensures that the first light conversion unit 12 has a color index of Ra95.

[0038] The emission wavelength, also known as the peak wavelength, is the wavelength corresponding to the highest point of the spectral curve. It represents the main color of the corresponding light source or phosphor, i.e., the emission wavelength of the phosphor. The emission wavelength of the phosphor is the peak wavelength of the emitted light.

[0039] In one embodiment of the present invention, the emission wavelength of the yellow phosphor is set to λ1, where 548nm ≤ λ1 ≤ 568nm. By selecting a yellow phosphor with an emission wavelength within the required range, the peak position of the yellow light emitted by the yellow phosphor can be ensured, that is, the center position of the spectrum of the yellow light emitted by the yellow phosphor is determined, which can reduce the intersection region of the spectra of the yellow, red, and cyan phosphors. The emission wavelength of the yellow phosphor can be any value among 548nm, 549nm, 550nm, 551nm, 552nm, 553nm, 554nm, 555nm, 556nm, 557nm, 558nm, 559nm, 560nm, 561nm, 562nm, 563nm, 564nm, 565nm, 566nm, 567nm, and 568nm, without limitation. Specifically, the emission wavelength of the yellow phosphor is 558nm.

[0040] In one embodiment of the present invention, the emission wavelength of the red phosphor is set to λ2, where 635nm ≤ λ2 ≤ 655nm. By selecting a red phosphor with an emission wavelength within the required range, the peak position of the red light emitted by the red phosphor can be guaranteed, that is, the center position of the spectrum of the red light emitted by the red phosphor is determined, which can reduce the intersection region of the spectra of yellow phosphor, red phosphor, and cyan phosphor. The emission wavelength of the red phosphor can be any value among 635nm, 636nm, 637nm, 638nm, 639nm, 640nm, 641nm, 642nm, 643nm, 644nm, 645nm, 646nm, 647nm, 648nm, 649nm, 650nm, 651nm, 652nm, 653nm, 654nm, and 655nm, without limitation. Specifically, the emission wavelength of the red phosphor is 645nm.

[0041] In one embodiment of the present invention, the emission wavelength of the cyan phosphor is set to λ3, where 475nm ≤ λ3 ≤ 495nm. By selecting a cyan phosphor with an emission wavelength within the required range, the peak position of the cyan light emitted by the cyan phosphor can be guaranteed, that is, the center position of the spectrum of the cyan light emitted by the cyan phosphor is determined, which can reduce the intersection region of the spectra of yellow phosphor, red phosphor, and cyan phosphor. The emission wavelength of the cyan phosphor can be any value among 475nm, 476nm, 477nm, 478nm, 479nm, 480nm, 481nm, 482nm, 483nm, 484nm, 485nm, 486nm, 487nm, 488nm, 489nm, 490nm, 491nm, 492nm, 493nm, 494nm, and 495nm, without limitation. Specifically, the emission wavelength of the cyan phosphor is 485nm.

[0042] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the backlight source further includes a second light source 2, which includes a second blue light chip 21, a green light chip 22, and a red light-emitting part 23. The second blue light chip 21 emits blue light; the green light chip 22 emits green light; and the red light-emitting part 23 emits red light. When the second light source 2 is activated, the second blue light chip 21 emits blue light, and the green chip emits green light, ensuring the purity of the blue and green light, thereby enabling the white light from the second light source 2 to have a high color gamut.

[0043] In different modes, the backlight can adaptively control the emission of either the first light source 1 or the second light source 2. Specifically, in the first mode, the first light source 1 emits light while the second light source 2 does not emit light, and the backlight has a small color gamut and good eye protection. In the second mode, both the first light source 1 and the second light source 2 emit light, and the backlight has a medium color gamut and moderate eye protection. In the third mode, the first light source 1 does not emit light while the second light source 2 emits light, and the backlight has a large color gamut and poor eye protection. Specifically, the color gamut of the first mode, the second mode, and the third mode increases sequentially, and the eye protection effect of the first mode, the second mode, and the third mode decreases sequentially.

[0044] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the red light-emitting part 23 includes a red light chip 231; the red chip can be directly controlled to emit red light, making it convenient to select a suitable red chip as needed.

[0045] Please see Figure 4 , Figure 5 and Figure 6 In one embodiment of the present invention, the red light-emitting part 23 includes a red light conversion part 232, which is at least partially located on the light emission path of the second blue light chip 21. After the blue light emitted by the blue chip enters the red light conversion part 232, the red light conversion part 232 can absorb part of the blue light and emit red light.

[0046] The red light conversion unit 232 is at least partially located on the light emission path of the second blue light chip 21. This means that the red light conversion unit 232 can be partially located on the light emission path of the second blue light chip 21, allowing some blue light to be staggered from the red light conversion unit 232. Alternatively, the red light conversion unit 232 can be entirely located on the light emission path of the second blue light chip 21, ensuring that all blue light emitted from the second blue light chip 21 passes through the red light conversion unit 232. This is not a limitation. Specifically, the red light conversion unit 232 is located on the light emission paths of the second blue light chip 21 and the green light chip 22. The red light conversion unit 232 includes red quantum dot powder or red phosphor, which is not a limitation. Specifically, the red light conversion unit 232 includes red phosphor.

[0047] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the backlight source further includes a bracket 3, on which both the first light source 1 and the second light source 2 are disposed. By disposing both the first light source 1 and the second light source 2 on the bracket 3, the integration of the first light source 1 and the second light source 2 can be ensured. The number and position of the first light source 1 and the second light source 2 on the bracket 3 can be set as needed; the bracket 3 has pads for the light-emitting chip to be electrically connected to the bracket 3 by soldering; the bracket 3 is used to be mounted on a circuit board and electrically connected to the circuit board.

[0048] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the bracket 3 has a first mounting groove 31, and at least a portion of the first light source 1 is disposed in the first mounting groove 31. By providing the first mounting groove 31, mounting space can be provided for the first light source 1, which facilitates the improvement of the installation stability of the first light source 1. The first mounting groove 31 can also separate the first light source 1 and the second light source 2, reducing interference between the first light source 1 and the second light source 2. At least a portion of the first light source 1 is disposed in the first mounting groove 31, meaning that part or all of the first light source 1 is disposed within the first mounting groove 31; when the first light source 1 is partially disposed within the first mounting groove 31, the first light source 1 may be partially disposed within the first mounting groove 31, with another portion exposed within the first mounting groove 31; for details, please refer to [link to relevant documentation]. Figure 4 , Figure 5 and Figure 6 The first blue light chip 11 is disposed in the first mounting slot 31, and the first light conversion part 12 can be at least partially disposed in the first mounting slot 31, and the first light conversion part 12 can expose the first mounting slot 31.

[0049] Please see Figure 1 , Figure 2 and Figure 3 In one embodiment of the present invention, the bracket 3 has a second mounting groove 32, and at least a portion of the second light source 2 is disposed in the second mounting groove 32. By providing the second mounting groove 32, mounting space can be provided for the second light source 2, which facilitates the improvement of the installation stability of the second light source 2; the second mounting groove 32 can also separate the first light source 1 and the second light source 2, reducing interference between the first light source 1 and the second light source 2. The second light source 2 being at least partially disposed in the second mounting groove 32 means that part or all of the second light source 2 is disposed within the second mounting groove 32. When the second light source 2 is partially disposed within the second mounting groove 32, the second light source 2 can be partially disposed within the second mounting groove 32, with the other part exposed within the second mounting groove 32. Specifically, the second blue light chip 21 and the green light chip 22 are disposed within the second mounting groove 32, wherein the red light chip 231 is disposed within the second mounting groove 32, or the second light conversion unit can be at least partially disposed within the second mounting groove 32, and the second light conversion unit can be exposed within the second mounting groove 32.

[0050] The bracket 3 includes a pad and a barrier disposed on the pad. The barrier surrounds and forms a receiving groove. The pad is provided with a baffle. The baffle is located in the receiving groove and separates the receiving groove into a first mounting groove 31 and a second mounting groove 32.

[0051] Please see Figure 7In one embodiment of the present invention, multiple first light sources 1 and multiple second light sources 2 are provided. The backlight source also includes a light strip plate 4, with any one of the first light sources 1 and any one of the second light sources 2 spaced apart on the light strip plate 4. By spaced apart the first light sources 1 and the second light sources 2, the number of the first light sources 1 and the second light sources 2 can be selected as needed, and the positions of the first light sources 1 and the second light sources 2 can be set separately, thereby reducing interference between the first light sources 1 and the second light sources 2 when setting them.

[0052] Multiple first light sources 1 and multiple second light sources 2 are provided. The backlight source also includes a light strip plate 4, with multiple first light sources 1 and multiple second light sources 2 arranged alternately on the light strip plate 4. By alternating the arrangement of the first light sources 1 and the second light sources 2, uniform mixing of the emitted light from the first light sources 1 and the second light sources 2 can be ensured when both the first light sources 1 and the second light sources 2 emit light.

[0053] The first light source 1 and the second light source 2 are respectively glued together to achieve their installation. The first light source 1 adopts a CSP (Chip-Scale Package) form. The light strip plate 4 can be a circuit board. Multiple first light sources 1 are spaced apart in the left-right direction to form a first mating group, and multiple first mating groups are spaced apart in the up-down direction; multiple second light sources 2 are arranged in the left-right direction to form a second mating group, and multiple second mating groups are spaced apart in the up-down direction. The first light source 1 is located between four adjacent second light sources 2.

[0054] The present invention also proposes a backlight module, which includes a backlight source. The specific structure of the backlight source is as described in the above embodiments. Since the backlight module adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0055] After the first light source 1 of the backlight module is activated, i.e., after the first blue light chip 11 is activated, the first blue light chip 11 emits light, ensuring that the first light source 1 emits blue light. The yellow phosphor can absorb some violet light and emit yellow light, causing the first light source 1 to emit yellow light. The red phosphor can absorb some violet light and emit red light, causing the first light source 1 to emit red light. The cyan phosphor can absorb some violet light and emit cyan light, causing the first light source 1 to emit cyan light. Overall, the white light emitted by the first light source 1 has a large spectral range, which is close to the spectrum of natural light, and has a good eye protection effect. As the backlight source of the display device, the first light source 1 can make the spectral range of light passing through the filter of the display device larger, enhancing the eye protection effect. When the user is viewing the screen, the time it takes for the user to enter a state of eye fatigue is extended, that is, the user is less likely to enter a state of eye fatigue.

[0056] The present invention also proposes a display device, the second subject of which includes a backlight module. The specific structure of the backlight module is as described in the above embodiments. Since the display device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] The display device can be any backlight-type display structure, such as a television or monitor, and is not limited thereto. Specifically, the display device is a television. After the first light source 1 of the backlight module is activated, the first blue light emits blue light, the yellow phosphor emits yellow light, the red phosphor emits red light, and the cyan phosphor emits cyan light. The blue, yellow, red, and cyan light emitted by the first light source 1 form white light. The first light source 1 has a large spectral range, which allows the spectral range of light passing through the filter of the display device to be larger, enhancing the eye protection effect. When the user views the screen, the time it takes for the user to enter a state of eye fatigue is extended, that is, the user is less likely to enter a state of eye fatigue.

[0058] The filters in existing display devices often use linearly polarized glass. The light emitted from linearly polarized glass is polarized in a single direction, which can easily stimulate the local retina, cause fatigue, and has poor compatibility with sunglasses. Specifically, when wearing sunglasses, it can easily create a black screen effect.

[0059] To improve the emitted light from the filter, the display device further includes a filter, which is configured as a circular polarizer. By using a circular polarizer, the emitted light from the filter can be polarized along a left-handed or right-handed circular polarization, which enables uniform energy distribution, reduces local stimulation to the retina, enhances eye protection, and allows the screen to be viewed from any angle when wearing sunglasses.

[0060] In this application, when the first light source 1 emits light and the second light source 2 does not emit light, the spectrum of the light passing through the filter matches the spectral distribution of the natural light D65 light source module to a standard SSI (Spectral Indicator Silent Index), satisfying SSI > 45%. The formula for calculating SSI is as follows, provided that the brightness of the light passing through the filter is consistent with the brightness of the D65 light source module. , where L(λ) is the spectral energy of natural light and Lt(λ) is the spectral energy of the D65 light source.

[0061] The display device further includes a main control chip, a first light control chip, and a second light control chip. The main control chip is electrically connected to the first and second light control chips. The first light control chip is electrically connected to the first blue light chip 11. The backlight source also includes a second light source 2, and the second light control chip is electrically connected to the second light source 2. After acquiring the display mode, the main control chip can transmit control signals to the first and second light control chips according to the corresponding display mode, and control the working state of the first light source 1 and the second light source 2 respectively. The main control chip is the SOC of the display device. The types of chips for the first and second light control chips can be selected as needed, including but not limited to FPGA and microcontroller.

[0062] The present invention also proposes a control method for a display device, based on the display device as described in any one of claims 9 to 10. The specific structure of the display device is as described in the above embodiments. Since this second subject matter adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The control method includes the following steps: Get display mode parameters; Determine the light emission control parameters based on the display mode parameters; The first light source 1 and the second light source 2 are controlled to emit light using the light emission control parameters.

[0063] The display mode parameters can be manually input, and the input methods include, but are not limited to, buttons, remote control, and voice, which are not specified here. After the display device acquires the display mode parameters, the display device can determine the display mode to be switched to. The display mode may include the first mode, the second mode, and the third mode.

[0064] In the first mode, the first light source 1 emits light while the second light source 2 does not emit light, and the backlight source has the characteristics of a small color gamut and good eye protection. In the second mode, both the first light source 1 and the second light source 2 emit light, and the backlight source has the characteristics of a medium color gamut and moderate eye protection. In the third mode, the first light source 1 does not emit light, and the second light source 2 emits light, and the backlight source has the characteristics of a large color gamut and poor eye protection. Specifically, the color gamut of the first mode, the second mode, and the third mode increases sequentially, and the eye protection effect of the first mode, the second mode, and the third mode decreases sequentially.

[0065] Determining light emission control parameters based on the display mode parameters means that after determining the display mode, the corresponding light emission control parameters can be obtained according to a preset mapping relationship. The light emission control parameters include the power supply parameters of the first light source 1 and the second light source 2.

[0066] Controlling the first light source 1 and the second light source 2 to emit light using the light emission control parameters means supplying power to the first light source 1 and the second light source 2 with the corresponding power supply parameters of the first light source 1 and the second light source 2, thereby controlling the operating state of the first light source 1 and the second light source 2 and realizing the switching of the display mode.

[0067] Users can input the corresponding display mode into the display device according to their preferences for color gamut and eye protection. Through the control method, the display device can recognize the corresponding display mode and adaptively switch to the corresponding display mode to meet the user's needs for color gamut and eye protection.

[0068] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A backlight source, characterized in that, Includes a first light source, the first light source comprising: The first Blu-ray chip; and, The first light conversion unit is at least partially disposed on the light output path of the first blue light chip, and the first light conversion unit includes yellow phosphor, red phosphor and cyan phosphor.

2. The backlight source as described in claim 1, characterized in that, The first light conversion unit has a color index of Ra95; and / or, The emission wavelength of the yellow phosphor is set to λ1, where 548nm ≤ λ1 ≤ 568nm; and / or, The emission wavelength of the red phosphor is set to λ2, where 635nm ≤ λ2 ≤ 655nm; and / or, The emission wavelength of the cyan phosphor is set to λ3, where 475nm ≤ λ3 ≤ 495nm.

3. The backlight source as described in claim 1, characterized in that, The backlight source further includes a second light source, the second light source comprising: The second blue light chip is used to emit blue light; A green light chip, used to emit green light; and, The red light-emitting part is used to emit red light.

4. The backlight source as described in claim 3, characterized in that, The red light-emitting part includes a red light chip; or... The red light-emitting part includes a red light conversion part, which is at least partially located on the light output path of the second blue light chip.

5. The backlight source as described in claim 3, characterized in that, The backlight source also includes a bracket, and both the first light source and the second light source are mounted on the bracket.

6. The backlight source as described in claim 5, characterized in that, The bracket has a first mounting groove, and at least a portion of the first light source is disposed in the first mounting groove; and / or, The bracket has a second mounting groove, and at least a portion of the second light source is disposed in the second mounting groove.

7. The backlight source as described in claim 3, characterized in that, Multiple first light sources and multiple second light sources are provided, and the backlight source also includes a light strip plate, wherein: Any one of the first light sources and any one of the second light sources are spaced apart on the light strip plate; and / or, Multiple first light sources and multiple second light sources are alternately arranged on the light strip plate.

8. A backlight module, characterized in that, Includes the backlight source as described in any one of claims 1 to 7.

9. A display device, characterized in that, Includes the backlight module as described in claim 8.

10. The display device as claimed in claim 9, characterized in that, The display device further includes a filter, which is configured as a circular polarizer; and / or, The display device further includes a main control chip, a first light control chip, and a second light control chip. The main control chip is electrically connected to the first light control chip and the second light control chip. The first light control chip is electrically connected to the first blue light chip. The backlight source further includes a second light source. The second light control chip is electrically connected to the second light source.

11. A control method for a display device, based on the display device as described in any one of claims 9 to 10, characterized in that, The backlight source also includes a second light source, which includes a second blue light chip, a green light chip, and a red light-emitting part. The control method includes the following steps: Get display mode parameters; Determine the light emission control parameters based on the display mode parameters; The first light source and the second light source emit light using the light emission control parameters.

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