CN104865746A - Backlight module with light-emitting mode switching design and display module using same - Google Patents
Backlight module with light-emitting mode switching design and display module using same Download PDFInfo
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- CN104865746A CN104865746A CN201510270481.2A CN201510270481A CN104865746A CN 104865746 A CN104865746 A CN 104865746A CN 201510270481 A CN201510270481 A CN 201510270481A CN 104865746 A CN104865746 A CN 104865746A
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- 238000000295 emission spectrum Methods 0.000 claims abstract description 42
- 238000001228 spectrum Methods 0.000 claims description 22
- 230000003287 optical effect Effects 0.000 claims description 6
- 206010049155 Visual brightness Diseases 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 27
- 238000007598 dipping method Methods 0.000 description 13
- 239000004973 liquid crystal related substance Substances 0.000 description 11
- 230000006378 damage Effects 0.000 description 10
- 239000000758 substrate Substances 0.000 description 9
- 208000027418 Wounds and injury Diseases 0.000 description 7
- 208000014674 injury Diseases 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000005286 illumination Methods 0.000 description 5
- 230000000149 penetrating effect Effects 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- 210000001525 retina Anatomy 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 241001062009 Indigofera Species 0.000 description 2
- 210000004087 cornea Anatomy 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 208000002177 Cataract Diseases 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 208000038015 macular disease Diseases 0.000 description 1
- 206010025482 malaise Diseases 0.000 description 1
- 230000000258 photobiological effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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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
- G02F1/1336—Illuminating devices
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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
- G02F1/1336—Illuminating devices
- G02F1/133626—Illuminating devices providing two modes of illumination, e.g. day-night
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- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Display Device Control (AREA)
- Liquid Crystal (AREA)
- Planar Illumination Modules (AREA)
Abstract
The invention discloses a backlight module with a light-emitting mode switching design and a display module using the same. The light generated by the first light source has a first emission spectrum, wherein the first emission spectrum has a first blue light peak and a first non-blue light peak. The light generated by the second light source has a second emission spectrum, wherein the second emission spectrum has a second blue light peak and a second non-blue light peak, and the intensity peak of the first blue light peak is greater than the intensity peak of the second blue light peak. The control module controls the first light source and the second light source according to the setting of the first mode and the second mode. In the first mode, the control module controls to light the first light source as a backlight source; in a second mode, the control module controls the first light source and the second light source to be alternately lightened according to a time sequence to serve as a backlight source.
Description
Technical field
The present invention is about a kind of backlight module and the display module using it; Specifically, the present invention about a kind of tool light-emitting mode switched design backlight module and use its display module.
Background technology
Along with the progress of display technology, there are many products can provide the image of high image quality.With regard to backlight module, the past is replaced by light emitting diode gradually using fluorescent lamp as the mode of backlight.Light emitting diode has the advantage such as high-luminous-efficiency and long service life, can reduce overall volume using light emitting diode as the display of backlight under same size, reaches light-weighted effect.
With illumination mode, general conventional light-emitting diode (LED) backlight module uses blue light-emitting diode, the blue-light excited phosphor powder sent by blue light-emitting diode wafer and produce white light.But the intensity of the blue light that blue light-emitting diode wafer sends is quite high.
In addition, because blue light is the visible ray that energy is stronger, its ability penetrating cornea is comparatively strong, and blue light most of energy after penetrating cornea is absorbed by retina, causes photochemistry to damage to retina.In recent years have research to point out successively, the high-energy wave band in Long Term Contact display, easily produces malaise symptoms to user's eyes, even causes damage, such as cataract or macular diseases.The light of this wavelength coverage of human eye Long contact time, can produce photochemical damage to retina.From the above, emit beam on the impact of health for reducing backlight module, existing display still haves much room for improvement.
Summary of the invention
An object of the present invention is the display module providing a kind of backlight module and use it, can reduce the injury of blue light to eyes.
Another object of the present invention is to provide a kind of display module, display color saturation degree can be improved.
Backlight module comprises the first light source, secondary light source and control module.The light that first light source produces has the first emission spectrum.First emission spectrum has the first blue light crest and the first non-blue light crest.The light that secondary light source produces has the second emission spectrum, and wherein, the second emission spectrum has the second blue light crest and the second non-blue light crest, and the intensity peak of the first blue light crest is greater than the intensity peak of the second blue light crest.Control module according to first mode and the second pattern setting and control the first light source and secondary light source.In the flrst mode, control module controls to light the first light source as backlight; Under the second mode, control module controls the first light source and secondary light source and to be alternately lit according to sequential and as backlight.
Display module comprises display panel and backlight module.Backlight module is arranged at the dorsal part of display panel, and provides the backlight needed for display panel display.Backlight module comprises the first light source, secondary light source, control module.The light that first light source produces has the first emission spectrum.The light that secondary light source produces has second emission spectrum different from the first emission spectrum.Control module controls the first light source and secondary light source and to be alternately lit according to sequential and as backlight.Display panel has when being shown as white picture and penetrates frequency spectrum, penetrates frequency spectrum and have primary peak between wavelength 430nm to 480nm, between wavelength 500nm to 580nm, have secondary peak.The ratio of the intensity peak of primary peak and the intensity peak of secondary peak is between 1.4 to 2.6.
Display module comprises display panel and backlight module.Display panel includes Red lightscreening plate, green color filter and blue color filter.Backlight module is arranged at the dorsal part of display panel, and provides the backlight needed for display panel display.Backlight module comprises the first light source, secondary light source, control module.The light that first light source produces has the first emission spectrum.The light that secondary light source produces has second emission spectrum different from the first emission spectrum.Control module controls light source according to the setting of first mode, the second pattern and the 3rd pattern and whether passes through optical filter.Display panel have when being shown as white picture with wavelength X be independent variable penetrate frequency spectrum T (λ), and definition to have with wavelength X be the target function A (λ) of independent variable:
A(λ)＝T(λ)*B(λ)*CMF(λ)，
Wherein: B (λ) is blue evil function (Blue Hazard Function), and CMF (λ) is human eye visual brightness color matching function.Target function A (λ) has the first index crest between wavelength 430nm to 480nm, has the second index crest between wavelength 500nm to 580nm.The ratio of the peak value of the first index crest and the peak value of the second index crest is between 1.78 to 2.37.By the light-emitting mode switching backlight, can blue light strength be reduced, avoid blue light to the injury of eyes.
Accompanying drawing explanation
Fig. 1 is an embodiment schematic diagram of backlight module of the present invention;
Fig. 2 is the emission spectrum distribution schematic diagram of the first light source and secondary light source;
Fig. 3 A is an embodiment schematic diagram of display module of the present invention;
Fig. 3 B penetrates the schematic diagram of frequency spectrum when being first mode;
The embodiment schematic diagram of light source igniting when Fig. 4 A is the second pattern;
Fig. 4 B and Fig. 4 C is the bright dipping schematic diagram under the second pattern during different son looks lattice;
Fig. 4 D be corresponding diagram 4A penetrate spectrum diagram;
The embodiment schematic diagram of light source igniting when Fig. 5 A is the 3rd pattern;
Fig. 5 B and Fig. 5 C is the bright dipping schematic diagram under the 3rd pattern during different son looks lattice;
Fig. 5 D be corresponding diagram 5A penetrate spectrum diagram;
Fig. 6 be display module of the present invention penetrate spectrum distribution schematic diagram;
Fig. 7 is the schematic diagram of blue evil function and human eye vision brightness color matching function;
Fig. 8 is the distribution schematic diagram of target function.
Wherein, Reference numeral:
100 display module 110 display panels
111 first substrates
112 second substrates
114 colored filters
114b blue color filter
114g green color filter
114r Red lightscreening plate
116 liquid crystal layers
130 backlight modules
132 first light sources
134 secondary light sources
136 control modules
210 first emission spectrums
220 second emission spectrums
211 first blue light crests
221 second blue light crests
212 first non-blue light crests
222 second non-blue light crests
213 first ruddiness crests
310 first blue light crests
320 first green glow crests
330 first ruddiness crests
410 first blue light crests
420 second green glow crests
430 first ruddiness crests
510 second blue light crests
520 first green glow crests
530 first ruddiness crests
600,610,620 curves
601,611,621 primary peaks
602,612,622 secondary peaks
700,710,720 target functions
701,711,721 first index crests
702,712,722 second index crests
During T1 first looks lattice
During T2 second looks lattice
Embodiment
The invention provides a kind of display module, there is the design of changeable light-emitting mode.Display module of the present invention is preferably liquid crystal display.In an embodiment, the light source of backlight module adopts white light emitting diode collocation cyan light emitting diode, utilizes the mode alternately lighted to switch on different display modes, is adjusted to different light-emitting modes to provide user can comply with required.
Fig. 1 is an embodiment schematic diagram of backlight module 130 of the present invention.As shown in Figure 1, backlight module 130 comprises the first light source 132, secondary light source 134 and control module 136.The light that first light source 132 produces has the first emission spectrum, and the light that secondary light source 134 produces has the second emission spectrum.Refer to first light source of Fig. 2 and the emission spectrum distribution schematic diagram of secondary light source.As shown in Figure 2, the first emission spectrum 210 has the first blue light crest 211, first non-blue light crest 212 and the first ruddiness crest 213.Second emission spectrum 220 has the second blue light crest 221 and the second non-blue light crest 222.The intensity peak of the first blue light crest 211 is greater than the intensity peak of the second blue light crest 221.First non-blue light crest 212 at least contains yellow wavelengths interval, and the second non-blue light crest 222 falls into green wavelength interval.In addition, the halfwidth of the second non-blue light crest 222 comes narrow compared with the halfwidth of the first non-blue light crest 212.As shown in Figure 2, compared to the first light source, the emission spectrum of secondary light source has narrower halfwidth in corresponding green wavelength interval.Get back to Fig. 1, control module 136 according to first mode and the second pattern setting and control the first light source 132 and secondary light source 134.Control module 136 can be lighted according to setup control first light source 132 of different mode and/or secondary light source 134.By this, backlight module 130 can produce backlight respectively and enter display panel under first mode or the second pattern.
Fig. 3 A is an embodiment schematic diagram of display module 100 of the present invention.As shown in Figure 3A, display module 100 comprises display panel 110 and backlight module 130.Display panel 110 comprises first substrate 111 and second substrate 112.At second substrate 112, the side of first substrate 111 is provided with colored filter 114, comprises Red lightscreening plate 114r, green color filter 114g and blue color filter 114b.Liquid crystal layer 116 is folded with between first substrate 111 and second substrate 112.Backlight module 130 is arranged at the dorsal part of display panel 110, comprises the first light source 132, secondary light source 134 and control module 136.Control module 136 controls light source according to the setting of first mode, the second pattern and the 3rd pattern and whether passes through optical filter.In other words, control module 136 can according to the setup control of different mode all or the optical filter light-permeable of part.By this, backlight module 130 can produce backlight respectively and enter display panel under first mode and the second pattern.
In the flrst mode, control module 136 controls to light the first light source 132 as backlight, and control Red lightscreening plate 114r, green color filter 114g and blue color filter 114b are printing opacity.As shown in Figure 3A, light through after backlight module 130 through display panel 110 from second substrate 112 bright dipping.Please refer to Fig. 3 B penetrate the schematic diagram of frequency spectrum when illustrating first mode.In figure 3b, different curves represents the different color light distribution of the first light source.As shown in Figure 3 B, the first light source has the first blue light crest 310, first green glow crest 320 and the first ruddiness crest 330 by the light of backlight module.According to the setting of aforementioned first mode as general using forestland, it only reaches full-color display with the first light source for backlight, can reach energy-saving effect by this.According to the setting of aforementioned first mode as general using forestland, it only reaches full-color display with the first light source 132 for backlight, can reach energy-saving effect by this.
In the preferred embodiment, the first light source 132 has the first blue light wafer, and the first light source 132 emitted light is the first emission spectrum 210 utilizing the first blue light wafer to excite the phosphor powder of yellow and redness and produce as Fig. 2.Under first mode, open the first light source 132 and control optical filter 114r, 114g, 114b be printing opacity all, and reach have as shown in Figure 3 B penetrate frequency spectrum.
Under the second mode, control module 136 controls the first light source 132 and secondary light source 134 and to be alternately lit according to sequential and as backlight.In other words, under the second mode, control module 136 control the first light source 132 and secondary light source 134 sequentially during depending on lattice in the first son depending on lattice during and the second son depending on lattice during be lit respectively.Please refer to Fig. 4 A.The embodiment schematic diagram of light source igniting when Fig. 4 A is the second pattern.As shown in Figure 4 A, the first light source and secondary light source are alternately lit depending on lattice period T2 depending on lattice period T1 and the second son at the first son respectively.
Under the second mode, control module 136 control the first light source 132 and secondary light source 134 sequentially during depending on lattice in the first son depending on lattice during and the second son depending on lattice during be lit respectively, and control Red lightscreening plate 114r and blue color filter 114b is printing opacity during the first son looks lattice, green color filter 114g is printing opacity during the second son looks lattice.Please refer to the bright dipping schematic diagram during different son looks lattice under the second pattern that Fig. 4 B and Fig. 4 C illustrates.As shown in Figure 4 B, during the first son looks lattice, light through after backlight module 130 through the position bright dipping of display panel 110 in corresponding Red lightscreening plate 114r and blue color filter 114b, and make light in the position not bright dipping of corresponding green color filter 114g by liquid crystal molecule in manipulation liquid crystal layer 116, be now during non-green glow looks lattice.As shown in Figure 4 C, during the second son looks lattice, light through after backlight module 130 through the position bright dipping of display panel 110 in corresponding green color filter 114g, and make light in the position not bright dipping of corresponding Red lightscreening plate 114r and blue color filter 114b by liquid crystal molecule in manipulation liquid crystal layer 116, now for during green glow looks lattice.Because secondary light source has narrower halfwidth in corresponding green wavelength interval, higher by the penetrance of green color filter.Replace illumination mode by this, display color scope can be made to increase, to provide preferably color representation ability.
What then illustrate with reference to figure 4D penetrates spectrum diagram.As shown in Figure 4 D, the first light source has the first blue light crest 410 and the first ruddiness crest 430 by the light of backlight module, and secondary light source has the second green glow crest 420 by the light of backlight module.It should be noted that the halfwidth of the second green glow crest 420 comes narrow compared with the halfwidth of the first green glow crest 320 shown in Fig. 3 B.Design by this, narrower the second green glow crest of halfwidth has higher excitation, and can improve the penetrance of green light band.According to the setting of aforementioned second pattern as color saturation mode, it replaces the green glow composition in the first light source with the green glow composition in secondary light source.Display color scope can be made by this to increase, to provide preferably color representation ability.
In the preferred embodiment, the first light source 132 has the first blue light wafer, and the first light source 132 emitted light utilizes the first blue light wafer excite the phosphor powder of yellow and redness and produce.Secondary light source 134 has the second blue light wafer, and secondary light source 134 emitted light utilizes the second blue light wafer excite green phosphor powder and produce.By this, under the second mode, light the first light source at the first son depending on lattice period T1, light secondary light source at the second son depending on lattice period T2, and control the mode of optical filter alternately printing opacity during different son looks lattice according to aforesaid way, and reach have as shown in Figure 3 D penetrate frequency spectrum.
In addition, separately can set three pattern different from aforementioned switching mode, make first, second light source by the light of heterogeneity.The different embodiment schematic diagram of light source igniting when Fig. 5 A is the second pattern.Similarly, in fig. 5, the first light source and secondary light source are alternately lit depending on lattice period T2 depending on lattice period T1 and the second son at the first son respectively.
In a third mode, control module 136 control the first light source 132 and secondary light source 134 sequentially during depending on lattice in the first son depending on lattice during and the second son depending on lattice during be lit respectively, and control Red lightscreening plate 114r and green color filter 114g is printing opacity during the first son looks lattice, blue color filter 114b is printing opacity during the second son looks lattice.Please refer to the bright dipping schematic diagram during different son looks lattice under the 3rd pattern that Fig. 5 B and Fig. 5 C illustrates.As shown in Figure 5 B, during the first son looks lattice, light through after backlight module 130 through the position bright dipping of display panel 110 in corresponding Red lightscreening plate 114r and green color filter 114g, and make light in the position not bright dipping of corresponding blue color filter 114b by liquid crystal molecule in manipulation liquid crystal layer 116, be now during non-blue photons looks lattice.As shown in Figure 5 C, during the second son looks lattice, light through after backlight module 130 through the position bright dipping of display panel 110 in corresponding blue color filter 114b, and make light in the position not bright dipping of corresponding Red lightscreening plate 114r and green color filter 114g by liquid crystal molecule in manipulation liquid crystal layer 116, now for during blue photons looks lattice.Because secondary light source 134 has the second less blue light crest of intensity peak, the blue light strength of backlight can be reduced.Replace illumination mode by this, the injury of blue light to eyes can be reduced.
What then illustrate with reference to figure 5D penetrates spectrum diagram.As shown in Figure 5 D, the first light source has the first green glow crest 520 and the first ruddiness crest 530 by the light of backlight module, and secondary light source has the second blue light crest 510 by the light of backlight module.It should be noted that the intensity peak of the second blue light crest 510 is come little compared with the intensity peak of the first blue light crest 310 shown in Fig. 3 B.Design by this, the second blue light crest that intensity peak is less has less blue light strength.According to the setting of aforementioned 3rd pattern as fitness mode, it replaces the blue light composition in the first light source with the blue light composition in secondary light source.By the blue light strength reducing backlight, the injury of blue light to eyes can be reduced.Found by measurement; first light source and secondary light source adopt the ratio of the first blue light peak intensity peak value of emission spectrum and the second blue light peak intensity peak value better between 0.69 and 1 (namely in Fig. 2 the ratio of the intensity peak of the first blue light crest 211 and the intensity peak of the second blue light crest 221 between 0.69 and 1), and human eye can be provided when switching to fitness mode preferably to protect.
Fig. 6 be display module of the present invention penetrate spectrum distribution schematic diagram.In figure 6, what different curves represented that backlight module adopts different light-emitting mode when being shown as white picture penetrates frequency spectrum.Wherein, curve 600 is for penetrating frequency spectrum (namely lighting the first light source) under general using forestland.Curve 610,620 is for penetrating frequency spectrum under fitness mode.Different curves have the ratio of different intensity peak.As shown in Figure 6, curve (600,610,620) has primary peak (601,611,621) between wavelength 430nm to 480nm, has secondary peak (602,612,622) between wavelength 500nm to 580nm.As previously mentioned, less blue light strength can be provided under fitness mode, to reduce the injury of blue light to eyes.Relative to the primary peak 601 of the curve 600 under general using forestland, curve (610,620) has the less primary peak of intensity peak (611,621).Found further by measurement, with preferred embodiment, do not affecting under display effect, the ratio of the intensity peak of primary peak and the intensity peak of secondary peak can provide human eye preferably to protect between 1.4 to 2.6.
In addition, according to International Electrotechnical Commission (International ElectrotechnicalCommission, IEC) for the blue light in light source on the impact of human body formulate safety standard IEC62471 about photo-biological security, it proposes indigo plant evil function (Blue HazardFunction) having substantial connection with human eye health.As shown in Figure 7, B (λ) is blue evil function, the light of wavelength coverage between 380nm and 540nm, has values in various degree to retina.In addition, according to International Commission on Illumination (International Commission on Illumination, CIE) human eye vision brightness color matching function (the color matching function formulated, CMF), it proposes the light of wavelength coverage between 380nm and 780nm, to amphiblestroid tristimulus values.As shown in Figure 7, CMF (λ) is the corresponding green band part of human eye visual brightness color matching function, the curve of wavelength coverage between 430nm and 680nm.Applicant finds, utilizes the green band part of blue evil function and human eye vision brightness color matching function to penetrate the weighting parameters of frequency spectrum as the present invention, adopts display module of the present invention to have some features, further illustrate in following content.
Fig. 8 is the distribution schematic diagram of target function.Each curvilinear system in fig. 8 represents the target function of different backlight module, it is the aforesaid product penetrating frequency spectrum and indigo plant evil function and human eye vision brightness color matching function, highlight different backlight module by this in wavelength coverage between 380nm and 540nm, and the backlight that wavelength coverage sends between 430nm and 680nm, to amphiblestroid stimulation degree.In detail, it is a function A (λ) of independent variable that target function is defined as with wavelength X, has following relation:
A(λ)＝T(λ)*B(λ)*CMF(λ)
Wherein, T (λ) penetrates frequency spectrum when being shown as white picture for display panel, and B (λ) is blue evil function (Blue Hazard Function), and CMF (λ) is human eye visual brightness color matching function.In fig. 8, the target function 700 under the corresponding general using forestland of the curve that dotted line illustrates, and the target function (710,720) under the corresponding fitness mode of the curve that solid line illustrates.As shown in Figure 8, backlight module of the present invention is adopted obviously to reduce at the more general using forestland of relative stimulus intensity of corresponding blue wave band.
Opinion further, target function (710,720,730) has two crests, wherein target function (710,720,730) has the first index crest (701 between wavelength 430nm to 480nm, 711,721), blue light components in its corresponding backlight.In addition, target function (710,720,730) has the second index crest (702,712,722) between wavelength 500nm to 580nm, and it is to should green portions in backlight.As shown in Figure 8, the peak value of the first index crest (711,721) about between 0.4 to 0.8, compared to the peak value (close to 1) of the first index crest 701 of general using forestland, obviously reduce, the stimulation of high-octane visible ray to human eye can be reduced.
In addition; adopt backlight module of the present invention to have the feature of ratio between 1.78 to 2.37 at the peakedness ratio of first, second index crest, by the target function institute that adjustment backlight is corresponding, there is intensity relation and can take into account human eye between this interval and protect and the effect of color representation.In addition, adopt backlight module of the present invention except the injury of blue light to eyes can be reduced, also can maintain existing color representation.As shown in table 1 in its color representation result of measurement:
Table 1
From the data of table 1, in white point skew in tolerance interval, according to the gamut standards of NTSC, adopt the color representation that backlight module of the present invention can remain existing.Compare in the intensity peak of blue wave band with regard to target function A (λ), relative under general using forestland, the intensity peak of curve 610 have dropped 29%, and curve 620 have dropped 47% especially.By this, provide human eye to protect not affecting under display effect, thus reduce blue light to the injury of eyes, improve the shortcoming that traditional display module only provides single light-emitting mode simultaneously.
The present invention is described by above-mentioned related embodiment, but above-described embodiment is only enforcement example of the present invention.Must it is noted that published embodiment limit the scope of the invention.On the contrary, be contained in the spirit of claims of the present invention and the amendment of scope and equalization to arrange and be all included within the scope of the present invention.
Claims (20)
1. a backlight module, is characterized in that, comprises:
One first light source, the light produced has one first emission spectrum; Wherein, this first emission spectrum has one first blue light crest and one first non-blue light crest;
One secondary light source, the light produced has one second emission spectrum; Wherein, this second emission spectrum has one second blue light crest and one second non-blue light crest, and the intensity peak of this first blue light crest is greater than the intensity peak of this second blue light crest; And
One control module, according to a first mode and one second pattern setting and control this first light source and this secondary light source;
Wherein, in the first mode, this control module controls to light this first light source as backlight; In this second mode, this control module controls this first light source and this secondary light source and to be alternately lit according to sequential and as backlight.
2. backlight module as claimed in claim 1, it is characterized in that, the ratio of this first blue light peak intensity peak value and this second blue light peak intensity peak value is between 0.69 and 1.
3. backlight module as claimed in claim 1, is characterized in that, in this second mode, this control module control this first light source and this secondary light source sequentially during one depending on lattice in one first son depending on lattice during and one second son depending on lattice during be lit respectively.
4. backlight module as claimed in claim 3, is characterized in that, this second son is depending on being during a blue photons looks lattice during lattice; This first son is depending on being during a non-blue photons looks lattice during lattice.
5. backlight module as claimed in claim 3, is characterized in that, the halfwidth of the halfwidth of this second non-blue light crest comparatively this first non-blue light crest comes narrow; This first non-blue light crest at least contains yellow wavelengths interval, and this second non-blue light crest falls into green wavelength interval; This second son is depending on being during green glow looks lattice during lattice; This first son is depending on being during non-green glow looks lattice during lattice.
6. backlight module as claimed in claim 1, is characterized in that separately having one first red light peak in this first emission spectrum.
7. a display module, is characterized in that, comprises:
One display panel; And
Just like described backlight module arbitrary in claim 1 to 6, be arranged at the dorsal part of this display panel, and under this first mode or this second pattern, produce backlight respectively and enter this display panel.
8. a display module, is characterized in that, comprises:
One display panel; And
One backlight module, is arranged at the dorsal part of this display panel, and provides the backlight needed for display panel display, and this backlight module comprises:
One first light source, the light produced has one first emission spectrum;
One secondary light source, the light produced has one second emission spectrum different from this first emission spectrum; And
One control module, controls this first light source and this secondary light source and to be alternately lit according to sequential and as backlight;
Wherein, this display panel has one and penetrates frequency spectrum when being shown as white picture, this penetrates frequency spectrum and have a primary peak between wavelength 430nm to 480nm, has a secondary peak between wavelength 500nm to 580nm; The ratio of the intensity peak of the intensity peak of this primary peak and this secondary peak is between 1.4 to 2.6.
9. display module as claimed in claim 8, is characterized in that, this control module control this first light source and this secondary light source sequentially during one depending on lattice in one first son depending on lattice during and one second son depending on lattice during be lit respectively.
10. display module as claimed in claim 9, is characterized in that, this second son is depending on being during a blue photons looks lattice during lattice; This first son is depending on being during a non-blue photons looks lattice during lattice.
11. display modules as claimed in claim 8, is characterized in that, this first emission spectrum has one first blue light crest and one first non-blue light crest; This second emission spectrum has one second blue light crest and one second non-blue light crest, and the intensity peak of this first blue light crest is greater than the intensity peak of this second blue light crest.
12. display modules as claimed in claim 11, is characterized in that separately having one first red light peak in this first emission spectrum.
13. 1 kinds of display modules, is characterized in that, comprise:
One display panel, includes Red lightscreening plate, green color filter and blue color filter; And
One backlight module, is arranged at the dorsal part of this display panel, and provides the backlight needed for display panel display, and this backlight module comprises:
One first light source, the light produced has one first emission spectrum;
One secondary light source, the light produced has one second emission spectrum different from this first emission spectrum; And
Whether one control module, control those light sources by those optical filters according to the setting of a first mode, the second pattern and one the 3rd pattern;
Wherein, it is that one of independent variable penetrates frequency spectrum T (λ) that this display panel has when being shown as white picture with wavelength X, and definition to have with wavelength X be a target function A (λ) of independent variable:
A(λ)＝T(λ)*B(λ)*CMF(λ)
Wherein: B (λ) is blue evil function (Blue Hazard Function)
CMF (λ) is human eye visual brightness color matching function
This target function A (λ) has one first index crest between wavelength 430nm to 480nm, has one second index crest between wavelength 500nm to 580nm; The ratio of the peak value of this first index crest and the peak value of this second index crest is between 1.78 to 2.37.
14. display modules as claimed in claim 13, is characterized in that, this control module control this first light source and this secondary light source sequentially during one depending on lattice in one first son depending on lattice during and one second son depending on lattice during be lit respectively.
15. display modules as claimed in claim 14, is characterized in that, this second son is depending on being during a blue photons looks lattice during lattice; This first son is depending on being during a non-blue photons looks lattice during lattice.
16. display modules as claimed in claim 13, is characterized in that, this first emission spectrum has one first blue light crest and one first non-blue light crest; This second emission spectrum has one second blue light crest and one second non-blue light crest, and the intensity peak of this first blue light crest is greater than the intensity peak of this second blue light crest.
17. display modules as claimed in claim 16, is characterized in that separately having one first red light peak in this first emission spectrum.
18. display modules as claimed in claim 17, is characterized in that, in the first mode, this control module controls to light this first light source as backlight, and control Red lightscreening plate, green color filter and blue color filter are printing opacity.
19. display modules as claimed in claim 17, it is characterized in that, in this second mode, this control module control this first light source and this secondary light source sequentially during one depending on lattice in one first son depending on lattice during and one second son depending on lattice during be lit respectively, and control Red lightscreening plate and blue color filter are printing opacity during this first son looks lattice, green color filter is printing opacity during this second son looks lattice.
20. display modules as claimed in claim 17, it is characterized in that, under the 3rd pattern, this control module control this first light source and this secondary light source sequentially during one depending on lattice in one first son depending on lattice during and one second son depending on lattice during be lit respectively, and control Red lightscreening plate and green color filter are printing opacity during this first son looks lattice, blue color filter is printing opacity during this second son looks lattice.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW104112741A TWI564630B (en) | 2015-04-21 | 2015-04-21 | Backlight module having design of switchable lighting modes and display module utilized thereof |
| TW104112741 | 2015-04-21 |
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| Publication Number | Publication Date |
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| CN104865746A true CN104865746A (en) | 2015-08-26 |
| CN104865746B CN104865746B (en) | 2018-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510270481.2A Active CN104865746B (en) | 2015-04-21 | 2015-05-25 | Backlight module with light-emitting mode switching design and display module using same |
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| CN (1) | CN104865746B (en) |
| TW (1) | TWI564630B (en) |
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Also Published As
| Publication number | Publication date |
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| TW201638642A (en) | 2016-11-01 |
| CN104865746B (en) | 2018-02-02 |
| TWI564630B (en) | 2017-01-01 |
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