CN103680420A - Display device - Google Patents
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- CN103680420A CN103680420A CN201310495623.6A CN201310495623A CN103680420A CN 103680420 A CN103680420 A CN 103680420A CN 201310495623 A CN201310495623 A CN 201310495623A CN 103680420 A CN103680420 A CN 103680420A
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Abstract
The invention relates to a display, which comprises a display panel, a backlight module and a backlight control circuit. The backlight module is used for providing a backlight source for the display panel, wherein the backlight module comprises a first light source used for providing first color light and a second light source used for providing second color light. The backlight control circuit is coupled to the backlight module and configured to control the backlight module to operate in one of a first display mode and a second display mode. When the backlight module operates in the first display mode, the backlight control circuit controls the first light source to provide the first color light as the backlight source during the picture period. When the backlight module is operated in the second display mode, the backlight control circuit controls the first light source and the second light source to provide at least one of the first color light and the second color light as the backlight source in the first sub-picture period and the second sub-picture period in the picture period in sequence.
Description
Technical field
The invention relates to a kind of display, and particularly relevant for a kind of display of changeable color saturation.
Background technology
Have that high image quality, space utilization efficiency are good, the liquid crystal display (Liquid Crystal Display, LCD) of low consumpting power, the advantageous characteristic such as radiationless becomes the main flow of display gradually.Because display panels does not have self luminous characteristic, therefore must below display panels, place backlight module, the light source that provides display panels required is provided.Traditional backlight module roughly can be divided into two classes, one is by cold-cathode tube (cold cathode Fluorescent Lamps, CCFL) backlight module forming, another is the backlight module being comprised of light emitting diode (light emitting diode, LED).Wherein, because light-emitting diode (LED) backlight module can promote the colour gamut of liquid crystal display, so Ge Jia manufacturer replaces cold-cathode tube backlight module mainly with light-emitting diode (LED) backlight module greatly now.
For the color representation of liquid crystal display, normally with the ordered standard of NTSC (National Television System Committee, NTSC), weigh the color saturation of display.What on the other hand, have an affiliated field knows that the knowledgeable is when adjusting the red saturation scale of liquid crystal display, green saturation and blue saturation, the reference frame that conventionally can adopt sRGB or EBU standard to adjust as color conventionally.
Generally speaking, in order to improve the color saturation of display, under existing technology, conventionally there are two kinds of different ways: (1) adopts the chromatic filter layer of high color saturation in display panel; (2) adopt the light emitting module of high color rendering as backlight.Yet above-mentioned both practices have defect to a certain extent.
Particularly, if adopt way (1), because the penetrance of the chromatic filter layer of high color saturation is quite low, therefore certainly will be by the driving power that improves light emitting module to maintain the luminosity of display.If adopt way (2), because its fluorescent powder that must mix higher concentration is realized the characteristic of high color rendering, so the luminescence efficiency of light emitting module can be relatively poor, and processing procedure tolerance is also lower.In other words, no matter adopt way (1) or way (2), if will promote the color saturation of display, be bound to such an extent that face the problem that power consumption promotes.
In addition, in some application situations (for example, while carrying out document processing), the picture of high color saturation presents and not belongs to necessary.And, watch for a long time the picture of high color saturation may cause audience's eye fatigue on the contrary.
Because the color saturation of existing display cannot be adjusted after design, so two characteristics such as the color saturation of display and power consumption performance certainly will cannot be taken into account with regard to existing technology.
Summary of the invention
The invention provides a kind of display, it can provide at least two kinds of display modes with different color saturation degree for audience's choice for use.
Display of the present invention comprises display panel, backlight module and backlight control circuit.Backlight module is disposed at the downside of display panel, and in order to provide backlight to give display panel, wherein backlight module comprises providing the first light source of the first coloured light, and in order to the secondary light source of the second coloured light to be provided.Backlight control circuit couples backlight module, and through setting, control backlight module operate in the first display mode and the second display mode one of them.When backlight module operates in the first display mode, backlight control circuit is controlled the first light source provides the first coloured light as backlight during picture, and when backlight module operates in the second display mode, backlight control circuit control first sub picture period of first and second light source in sequentially during picture and the second sub picture period provide first and second coloured light at least one of them as backlight.
Based on above-mentioned, the embodiment of the present invention proposes a kind of display, and it can provide two kinds of display modes with different color saturation degree for audience's choice for use.Under the display mode of low color saturation, the white light that backlight module can provide high-luminous-efficiency as backlight to save the power consumption of display.Under the display mode of high color saturation, the color sequence of the picture data that backlight module can receive according to display panel and provide corresponding coloured light as backlight, thus improve the color saturation of display.Base this, the display of the embodiment of the present invention can utilize suitable display mode to carry out display frame in response to the viewing and admiring demand of audience, thereby takes into account luminescence efficiency and the display quality of display.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate appended graphic being described in detail below.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the display of one embodiment of the invention;
Fig. 2 is the schematic diagram of the backlight module of one embodiment of the invention;
Fig. 3 A operates in the schematic diagram under the first display mode for the backlight module according to an embodiment of Fig. 2;
Fig. 3 B is the schematic diagram according to the backlight drive sequential of an embodiment of Fig. 3 A;
Fig. 3 C is the luminous spectrum diagram according to the first coloured light of an embodiment of Fig. 3 A;
Fig. 4 A operates in the schematic diagram under the second display mode for the backlight module according to an embodiment of Fig. 2;
Fig. 4 B is the schematic diagram according to the backlight drive sequential of an embodiment of Fig. 4 A;
Fig. 4 C is the luminous spectrum diagram according to the second coloured light of an embodiment of Fig. 4 A;
Fig. 4 D is the luminous spectrum diagram according to the second coloured light of another embodiment of Fig. 4 A;
Fig. 5 is the schematic diagram of the backlight module of another embodiment of the present invention;
Fig. 6 A operates in the schematic diagram of the backlight drive sequential under the first display mode according to the backlight module of an embodiment of Fig. 5;
Fig. 6 B is the luminous spectrum diagram according to the 3rd coloured light of an embodiment of Fig. 5;
Fig. 7 A operates in the schematic diagram of the backlight drive sequential under the second display mode according to the backlight module of an embodiment of Fig. 5;
Fig. 7 B is the luminous spectrum diagram according to first and second coloured light of an embodiment of Fig. 5.
Wherein, Reference numeral:
100: display
110: display panel
120,520: backlight module
122a, 522a: the first light source
122b, 522b: secondary light source
124: light guide plate
126: filter unit
130: backlight control circuit
140: display driver circuit
524: light conversion layer
B: blueness
BL: backlight
CL1: the first coloured light
CL2: the second coloured light
CL3: the 3rd coloured light
DATA_dp, DATA_RGB: picture data
DATA_R: red picture data
DATA_G: green picture data
DATA_B: blue picture data
FP: during picture
G: green
LPF: filtering curve
S_mode: mode instruction
R: redness
W: white
Embodiment
Below in conjunction with the drawings and specific embodiments, describe the present invention, but not as a limitation of the invention.
The embodiment of the present invention proposes a kind of display, it can provide two kinds of display modes with different color saturation degree for audience's choice for use, to make audience view and admire demand and to select suitable display mode in response to it, thereby take into account luminescence efficiency and the display quality of display.For content of the present invention can more easily be understood, below the example that really can implement according to this as the present invention especially exemplified by embodiment.In addition, all may part, in graphic and embodiment, use the element/member/step of same numeral, represent identical or like.
Fig. 1 is the schematic diagram of the display of one embodiment of the invention.Please refer to Fig. 1, display 100 comprises display panel 110, backlight module 120, backlight control circuit 130 and display driver circuit 140.
In the present embodiment, display panel 110 is for example two corresponding substrate (not illustrating), a non-autoluminescence display dielectric layer (not illustrating) and the chromatic filter layers (not illustrating) of arranging.Non-autoluminescence display dielectric layer (not illustrating) is arranged at two corresponding settings between substrate (not illustrating), and chromatic filter layer (not illustrating) is arranged at the two corresponding substrates that arrange on any one.Wherein, chromatic filter layer (not illustrating) at least comprises redness, green, blueness or other suitable color, and non-autoluminescence display dielectric layer (not illustrating) comprises liquid crystal layer, electric wettable layer, electrophoresis layer or other suitable material.Moreover, for can the non-autoluminescence display dielectric layer of ACTIVE CONTROL, display panel 110 more comprises active member (not illustrating) and is arranged at the two corresponding substrates that arrange on any one, and wherein, active member is from chromatic filter layer selectively simultaneously on identical substrate or on different substrates.The present invention comprises that with display panel 110 liquid crystal display (liquid crystal display, the LCD) panel of chromatic filter layer (color filter layer) is used as embodiment, but not as limit.Display panel 110 is controlled by display driver circuit 140, and shows corresponding picture according to the picture data DATA_dp receiving from display driver circuit 140.For instance, display driver circuit 140 can for example comprise time schedule controller (timing controller) (not illustrating), gate drivers (gate driver) (not illustrating) and source electrode driver (source driver) (not illustrating).Time schedule controller can be used for the time sequences of control gate driver and source electrode driver and provides picture data DATA_dp to source electrode driver.Gate drivers be controlled by time schedule controller and with specific time series open the every one-row pixels (pixel) on display panel 110.Source electrode driver is worked in coordination with the unlatching sequential of every one-row pixels on display panel 110 and is provided corresponding pixel voltage to drive display panel 110, thus the picture that makes display panel 110 show corresponding to picture data DATA_dp.In this, during display panel 110 may be defined as a picture according to the picture data DATA_dp required time of complete picture of demonstration (frame period).
Specifically, backlight module 120 comprises providing the first light source 122a of the first coloured light CL1 and in order to the secondary light source 122b of the second coloured light CL2 to be provided.Wherein, backlight control circuit 130 can receive a mode instruction CMD who is sent by controlling interface (not illustrating) by user/audience, and adopt different driving means to control the sequential of lighting of the first light source 122a and secondary light source 122b according to received mode instruction CMD, wherein, backlight control circuit 130 output the first light source control signal BL_122a control the first light source 122a, backlight control circuit 130 output secondary light source control signal BL_122b control secondary light source 122b, thereby make the demand that display panel 110 can be based on audience and present the image frame with different color saturation degree.
More particularly, backlight module 120 can be controlled by backlight control circuit 130 and operate in the first display mode and the second display mode one of them.When backlight module 120 operates in the first display mode, backlight control circuit 120 can be controlled the first light source 122a provides the first coloured light CL1 as backlight BL during each picture.When backlight module 120 operates in the second display mode, backlight control circuit 130 can control the first sub picture period in sequentially during each picture of the first light source 122a and secondary light source 122b and the second sub picture period provide the first coloured light CL1 and the second coloured light CL2 at least one of them as backlight BL.
In this, described the first sub picture period may be defined as display panel 110 and shows the first required time of color part in a complete picture according to the first color picture data in picture data DATA_dp, described the second sub picture period may be defined as display panel 110 and shows the second required time of color part in a complete picture according to the second color picture data in picture data DATA_dp, and the first color picture data and the second color picture data combine and are necessary for full-color picture data.For example, if the first color picture data is red and blue picture data simultaneously, the second color picture data is green picture data; If the first color picture data is red picture data, the second color picture data is green and blue picture data.In other words, display panel 110 the first sub picture period in can be during described picture receives the first color picture data, and the second sub picture period in during described picture receives the second color picture data.
In the present embodiment, the first coloured light CL1 is white light, and the second coloured light CL2 is green glow, cyan light or ruddiness.The corresponding color of described the first color picture data is identical in fact with the color of the second coloured light CL2, in other words, the color of the corresponding color of the first color picture data and the second coloured light CL2 is in having overlapping position in frequency spectrum separately, and the corresponding color of the first and second color picture data differs from one another.For instance, if the second coloured light CL2 is green glow or cyan light, the first color picture data can be for example green picture data, and the second color picture data can be for example the composition of red picture data and blue picture data.
In another embodiment, the first coloured light CL1 is white light, and the second coloured light CL2 is green glow.The corresponding color of described the second color picture data is identical with the color of the second coloured light CL2, and the corresponding color of the first and second color picture data differs from one another.For instance, if the second coloured light CL2 is green glow, the second color picture data can be for example green picture data, and the first color picture data can be for example the composition of red picture data and blue picture data.If the second coloured light CL2 is ruddiness, the second color picture data can be for example red picture data, and the first color picture data can be for example the composition of green picture data and blue picture data.
In other words, in embodiments of the present invention, the first color picture data that display panel 110 receives is identical with the color of one of them corresponding color of the second color picture data and the second coloured light CL2, and the first color picture data and the corresponding color of the second color picture data differ from one another.
Color based on above-mentioned picture data DATA_dp and the first light source 122a and secondary light source 122b and sequential collocation, the display 100 of the embodiment of the present invention can realize under the first display mode, provide the white light of high-luminous-efficiency as backlight BL to reduce the power consumption of display 100, and under the second display mode, utilize the type of drive of look order method (color sequential), provide in during the demonstration of particular color picture color rendering preferably coloured light (for example: ruddiness or green glow) as backlight BL to improve the color saturation of integral display 100.In addition, drive characteristic based on above-mentioned, the optional use of chromatic filter layer of display panel 110 has compared with the material of high penetration (transmittance) and realizes (general about NTSC72% colorized optical filtering layer material used for example, wherein said colorized optical filtering layer material can be such as being pigment (pigment) materials such as PR254/PR177/PG58/PY138/PB15:6, or the dyestuffs such as v-dye (dye) material, the present invention is not as limit), make display 100 under the second display mode of high color saturation, also can there is the characteristic (compared to the chromatic filter layer of selecting high color saturation) of high penetration.
The first coloured light CL1 described herein and the second coloured light CL2 are not only defined in monochromatic light, and it also can be the mixed light with the wavelength components of other colors.For instance, if secondary light source 122b is the green light source of realizing with blue-light LED chip collocation green fluorescent material, though its second coloured light CL2 sending is referred to as green glow in the embodiment of the present invention, but it in fact still includes the wavelength components of blue light, therefore also can be referred to as blue green light, in this close first chat bright.
Beneath concrete framework and driving configuration, driving sequential and the luminous frequency spectrum of backlight module 120 under different display modes that further illustrates backlight module 120 with Fig. 2 to Fig. 4 D embodiment.In the present embodiment, for ease of explanation, the first light source 122a for example be take white light source, as example (can be realized by the blue-light LED chip yellow fluorescent material of arranging in pairs or groups), and the first coloured light CL1 is for example white light (W).Secondary light source 122b for example be take green light source, as example (can be realized by the blue-light LED chip green fluorescent material of arranging in pairs or groups), and the second coloured light CL2 is for example green glow (G).But the present invention is not as limit.
Fig. 2 is the schematic diagram of the backlight module of one embodiment of the invention.Please refer to Fig. 2, the backlight module 120 of the present embodiment is to take the framework of side direction incident type to illustrate as example, and it also can further comprise light guide plate (or being called light guide element) 124 except comprising the first light source 122a and secondary light source 122b.In addition, the backlight module 120 of the present embodiment also can optionally arrange according to deviser's demand a filter unit 126(and about filter unit 126, be arranged at no caused difference and can in subsequent embodiment, further illustrate between secondary light source 122b and light guide plate 124), wherein filter unit 126 can be in order to the specific wavelength composition in filtering the second coloured light CL2, so that the color of the second coloured light CL2 is purer.
Specifically,, when backlight module 120 operates in the first display mode (being referred to as " low NTSC pattern " in this), the driving configuration of backlight module 120, driving sequential and luminous frequency spectrum are as shown in Fig. 3 A～3C.Wherein, Fig. 3 A operates in the schematic diagram under the first display mode for the backlight module according to an embodiment of Fig. 2.Fig. 3 B is the schematic diagram according to the backlight drive sequential of an embodiment of Fig. 3 A.Fig. 3 C is the luminous spectrum diagram according to the first coloured light of an embodiment of Fig. 3 A.
Referring to Fig. 3 A to Fig. 3 C, when backlight module 120 operates in low NTSC pattern, the first light source 122a can be lit and secondary light source 122b can be closed, and make backlight module 120 that the first coloured light CL1(is provided is for example white light (W) in the present embodiment) carry out the backlight BL as display panel 110.
The driving sequential of Fig. 3 B of take is example, when display panel 110 receives the picture data DATA_RGB of a corresponding display frame during a picture in FP, the first light source control signal BL_122a(that the first light source 122a can react on activation is high level in this) during picture, in FP, be lit length (length during this section can by deviser's designed, designed), wherein the first light source 122a be lit during be the first light source control signal BL_122a be positioned at high level during, the secondary light source control signal BL_122b(that secondary light source 122b can react on forbidden energy is low level in this) be closed constantly.Wherein, under low NTSC pattern, the luminous frequency spectrum of backlight BL can be as shown in Figure 3 C.
In the present embodiment, owing to operating in the backlight module 120 of low NTSC pattern, to there is the white light source of high-luminous-efficiency, provide backlight, therefore only need the lower driving power of supply can maintain the luminosity of backlight module 120, thereby can make the overall power of display 100 be minimized.Wherein, the color saturation of display 100 under low NTSC pattern is for example about NTSC72% left and right.
On the other hand, when backlight module 120 operates in the second display mode (being referred to as " high NTSC pattern " in this), the driving configuration of backlight module 120, driving sequential and luminous frequency spectrum are as shown in Fig. 4 A～4D.Wherein, Fig. 4 A operates in the schematic diagram under the second display mode for the backlight module according to an embodiment of Fig. 2.Fig. 4 B is the schematic diagram according to the backlight drive sequential of an embodiment of Fig. 4 A.Fig. 4 C is the luminous spectrum diagram according to the second coloured light of an embodiment of Fig. 4 A.Fig. 4 D is the luminous spectrum diagram according to the second coloured light of another embodiment of Fig. 4 A.In addition, low NTSC pattern is herein relative pattern with high NTSC pattern, that is, low NTSC pattern has lower color saturation but has higher penetrance compared to high NTSC pattern.
Referring to Fig. 4 A and 4B, when backlight module 120 operates in high NTSC pattern, the first light source 122a can be controlled by backlight control circuit 130 from secondary light source 122b and be lit according to different driving sequential, thereby make the different sub picture period of backlight module 120 in during picture that the second coloured light CL2(is provided, is for example green glow (G) in the present embodiment) with the backlight BL of first one of them person of coloured light CL1 as display panel 110.
The driving sequential of Fig. 4 B of take is example, when display panel 110 first sub picture period SFP1 in FP during picture receives the green picture data DATA_G of green portion of a corresponding display frame, the first light source 122a and secondary light source 122b can react on respectively the first light source control signal BL_122a of activation and secondary light source control signal BL_122b and in the first sub picture period SFP1, be lit length (length during this section equally can by deviser's designed, designed) simultaneously, to provide white light (W) and green glow (G) as backlight BL when display panel 110 shows green picture simultaneously.Then, when display panel 110 second sub picture period SFP2 in FP during picture receives the corresponding redness of a display frame and the picture data DATA_RB of blue portion, the first light source 122a can react on the first light source control signal BL_122a of activation and in the second sub picture period SFP2, be lit separately length, now secondary light source 122b reacts on the secondary light source control signal BL_122b of forbidden energy and closes, with when display panel 110 shows red and blue picture, provide separately white light (W) as backlight BL.
Base this, because backlight module 120 can provide the green glow (G) of high color rendering as backlight BL when display panel 110 shows green picture, the color saturation of display 100 is promoted.Wherein, the color saturation of display 100 under high NTSC pattern is for example about NTSC93% left and right.
In the embodiment of high NTSC pattern, backlight BL in the first coloured light CL1(or the second sub picture period SFP2) luminous frequency spectrum is identical with earlier figures 3C embodiment, and backlight BL in the second coloured light CL2(or the first sub picture period SFP1) luminous frequency spectrum can be according to the configuration of filter unit 126 and as shown in Fig. 4 C or Fig. 4 D.Wherein, the heavy line of Fig. 4 C and Fig. 4 D part represents respectively the luminous frequency spectrum of unfiltered and filtered the second coloured light CL2, and the fine line part of Fig. 4 C represents the filtering curve LPF of filter unit 126.In the present embodiment, the second coloured light CL2 at least has First Characteristic peak C P1 and Second Characteristic peak C P2, wherein First Characteristic peak C P1 is positioned at blue light wavelength scope (for example approximately 400～480 nanometers), and Second Characteristic peak C P2 is positioned at green wavelength (for example approximately 480～620 nanometers).
As shown in Figure 4 C, do not arranging under backlight module 120 frameworks of filter unit 126, the spectrum intensity of First Characteristic peak C P1 is greater than approximately 2.2 times of the spectrum intensities above (that is the spectrum intensity of First Characteristic peak C P1 is approximately greater than 2.2 divided by the spectrum intensity of Second Characteristic peak C P2) of Second Characteristic peak C P2.In other words, the second coloured light CL2 that secondary light source 122b sends, under the situation of non-filtered, its excitation lower (because blue light ingredient is greater than green glow composition), the restriction that therefore may make the color of display frame represent to be subject to a certain extent (but compared to merely with white light as backlight, still can provide higher color saturation).
Therefore,, in one example of the present invention embodiment, backlight module 120 can, by filter unit 126 is set, with the energy of filtering the second coloured light CL2 within the scope of blue light wavelength, be used the colour purity of filtered the second coloured light CL2 can further be promoted.Wherein, the wavelength coverage of 126 filterings of filter unit can be for example approximately 420～500 nanometers overlapping with blue light wavelength scope, and the maximum filtered spectrum intensity of filter unit 126 can be for example for being approximately less than 0.7 divided by its minimum filtered spectrum intensity.More particularly, in actual applications, filter unit 126 can for example penetrate for having the film (film) that the narrow little molecular dye of frequency spectrum halfwidth is made, wherein said film can utilize the made PET film of mode of poly-terephthaldehyde's diethylester (Polyethyleneterephthalate, PET) ejection formation to realize.In addition, described film can also utilize the mode that is modulated into photoresistance, and directly the mode by rotary coating (spin coating) is formed in target base plate, but the present invention is not as limit.
The luminous frequency spectrum of filtered the second coloured light CL2 can be as shown in Figure 4 D, and wherein the spectrum intensity of the First Characteristic peak C P1 of filtered the second coloured light CL2 is approximately less than 0.62 divided by the spectrum intensity of Second Characteristic peak C P2.In other words, secondary light source 122b the second coloured light CL2 that unit 126 sends after filtering, more unfiltered the second coloured light CL2 is high for its excitation, be in filtered the second coloured light CL2 in green wavelength (for example approximately 480～620 nanometers) shared composition higher, therefore can promote further the color saturation of display 100.
In this, although in Fig. 4 B embodiment, be that to take the backlight drive mode of lighting the first light source 122a and secondary light source 122b in the first sub picture period SFP1 be example simultaneously.But in another exemplary embodiment, backlight control circuit 130 also can be lighted separately secondary light source 122b in the first sub picture period SFP1, only to provide green glow (G) as backlight BL in the first sub picture period SFP1, can reach preferably high NTSC pattern, therefore the present invention is not limited in the driving sequential that Fig. 4 B illustrates.In other words; as long as the type of drive person of " backlight module 120 is when operating in the second display mode (high NTSC pattern); at least secondary light source 122b is lit in the first sub picture period SFP; at least to provide the second coloured light CL2 as backlight BL; and the first light source 122a is lit separately in the second sub picture period SFP2; to provide the first coloured light CL1 as backlight BL " is provided, neither depart from the category of institute of the present invention wish protection.
Beneath concrete framework, driving sequential and the luminous frequency spectrum that illustrates the backlight module 520 of another embodiment of the present invention with Fig. 5 to Fig. 7 B.Please also refer to Fig. 5, the backlight module 520 of the present embodiment is similar with control mode and the applied environment of the backlight module 120 of earlier figures 1 embodiment haply.Difference part is between the two, the backlight module 520 of the present embodiment is except comprising the first light source 522a and secondary light source 522b, and it also comprises a light conversion layer 524.Wherein, the first light source 522a, the secondary light source 522b of the present embodiment and the color of light conversion layer 524 are corresponding one to one with three primary colors respectively.For instance, if the first light source 522a is red light source and secondary light source 522b, be blue-light source, light conversion layer 524 can utilize green fluorescent material to realize.Again, if the first light source 522a is green light source and secondary light source 522b, be red light source, light conversion layer 524 can utilize blue fluorescent material to realize, by that analogy.
In the present embodiment, for ease of explanation, the first light source 522a for example be take blue-light source, as example (can be realized by blue-light LED chip), and the first coloured light CL1 is for example blue light (B).Secondary light source 522b for example be take red light source, as example (can be realized by red LED chip), and the second coloured light CL2 is for example ruddiness (R).Light conversion layer 524 is to take green light conversion layer (for example can be realized by green fluorescent material as example, described green fluorescent material can utilize for example green nitride (green nitride) fluorescent powder to realize, and the corresponding wavelength of its characteristic peaks is for example 529/531/535nm; Or, also can utilize the common fluorescent powder such as green sulfide (green sulfide) fluorescent powder to realize.As long as at the luminous fluorescent powder of green light band, all can be applicable in this inventive embodiments).And when the first coloured light CL1 and the second coloured light CL2 are incident to light conversion layer 524, the 3rd coloured light CL3 that light conversion layer 524 inspires is for example white light (W) simultaneously.But the present invention is not limited only to this.
Specifically,, when backlight module 520 operates in the first display mode (low NTSC pattern), the driving sequential of backlight module 520 and luminous frequency spectrum are as shown in Fig. 6 A and 6B.Wherein, Fig. 6 A operates in the schematic diagram of the backlight drive sequential under the first display mode for the backlight module according to an embodiment of Fig. 5.Fig. 6 B is the luminous spectrum diagram according to the 3rd coloured light of an embodiment of Fig. 5.
Referring to Fig. 5, Fig. 6 A and Fig. 6 B, when backlight module 520 operates in low NTSC pattern, the first light source 522a and secondary light source 522b can be controlled by respectively the first backlight control signal BL_522a that backlight control circuit (as 130) provided and the second backlight control signal BL_522b and be lit simultaneously, make light conversion layer 524 absorb the first coloured light CL1(is blue light (B) simultaneously in the present embodiment) in the present embodiment, be ruddiness (R) with the second coloured light CL2() to inspire the 3rd coloured light CL3(, in the present embodiment, be about white light (W)), thereby make backlight module 520 provide the 3rd coloured light CL3 to carry out the backlight BL as display panel (as 110).
The driving sequential of Fig. 6 A of take is example, when display panel receives the picture data DATA_RGB of a corresponding display frame during a picture in FP, the first light source 522a and secondary light source 522b can react on respectively the first backlight control signal BL_522a of activation and the second backlight control signal BL_522b and during picture, in FP, be lit length simultaneously.Wherein, under low NTSC pattern, the luminous frequency spectrum of backlight BL can be as shown in Figure 6B.
On the other hand, when backlight module 520 operates in the second display mode (high NTSC pattern), the driving sequential of backlight module 520 and luminous frequency spectrum are as shown in Fig. 7 A and 7B.Wherein, Fig. 7 A operates in the schematic diagram of the backlight drive sequential under the second display mode for the backlight module according to an embodiment of Fig. 5.Fig. 7 B is the luminous spectrum diagram according to first and second coloured light of an embodiment of Fig. 5.
Referring to Fig. 5, Fig. 7 A and Fig. 7 B, when backlight module 520 operates in high NTSC pattern, the first light source 522a can be controlled by backlight control circuit from secondary light source 522b and be lit according to different driving sequential, thus make the different sub picture period of backlight module 520 in during picture by light conversion layer 524 provide the first coloured light CL1, the second coloured light CL2 and the 3rd coloured light CL3 at least one of them as backlight BL.
The driving sequential of Fig. 7 A of take is example, when display panel first sub picture period SFP1 in FP during picture receives the blue picture data DATA_B of blue portion of a corresponding display frame, the first light source 522a can react on the first backlight control signal BL_522a of activation and in the first sub picture period SFP1, be lit separately length (length during this section equally can by deviser's designed, designed), with when display panel shows blue picture, provide blue light (B) as backlight BL(now secondary light source 522b react on the second backlight control signal BL_522b of forbidden energy and close).Then, when display panel receives the red picture data DATA_R of red part of a corresponding display frame during picture in the second sub picture period SFP2 in FP, the first backlight control signal BL_522a switches to forbidden energy and the second backlight control signal BL_522b switches to activation, make secondary light source 522b react on the second backlight control signal BL_522b of activation and in the second sub picture period SFP2, be lit separately length (length during this section equally can by deviser's designed, designed), with when display panel shows red picture, provide ruddiness (R) as backlight BL(now the first light source 522a react on the first backlight control signal BL_522a of forbidden energy and close).Thereafter, when display panel receives the green picture data DATA_G of green portion of a corresponding display frame during picture in the 3rd sub picture period SFP3 in FP, the first light source 522a and secondary light source 522b can react on respectively the first backlight control signal BL_522a of activation and the second backlight control signal BL_522b and in the 3rd sub picture period SFP3, be lit length (length during this section equally can by deviser's designed, designed) simultaneously, to provide white light (W) as backlight BL when display panel shows green picture.Wherein, under high NTSC pattern, the luminous frequency spectrum of the first coloured light CL1 and the second coloured light CL2 can be as shown in Figure 7 B, and the luminous frequency spectrum of the 3rd coloured light CL3 can be as shown in earlier figures 6B.
In order to be implemented in the function that improves color saturation under high NTSC pattern, between the corresponding color of picture data that display panel receives in each sub picture period SFP1, SFP2 and SFP3 and the color of the first coloured light CL1, the second coloured light CL2 and the 3rd coloured light CL3, can there is specific corresponding relation.More clearly say, the corresponding color of the first color picture data that display panel receives in the first sub picture period (being to take blue picture data as example in the present embodiment) can be identical in fact with the color of the first coloured light CL1.Corresponding color can be identical in fact with the color of the second coloured light CL2 for the second color picture data that display panel receives in the second sub picture period (being to take red picture data as example in the present embodiment).The corresponding color of the 3rd color picture data that display panel receives in the 3rd sub picture period (being to take green picture data as example in the present embodiment) is different from the color of the first coloured light CL1 and the second coloured light CL2.
By above-mentioned type of drive, backlight module 520 can be realized characteristic and the function being similar to described in earlier figures 1 to Fig. 4 D embodiment, therefore identical or repeat part and repeat no more in this.
In another exemplary embodiment, when display panel receives the green picture data DATA_G of green portion of a corresponding display frame during picture in the 3rd sub picture period SFP3 in FP, in can be during this picture, light separately the first light source 522a, to reach better green color rendering.In other words, in this exemplary embodiment, with Fig. 7 A, the first light source 522a can be respectively at being lit separately length in the first sub picture period SFP1 and SFP3, and secondary light source 522b can be lit separately length in the second sub picture period SFP2.That is the first light source 522a can alternately be lit from secondary light source 522b in different sub picture period.
The backlight module 520 driving with above-mentioned driving sequential can be applicable in general closed planar display or three-dimensional display.No matter it is applied in the display of which kind, all can realize under low NTSC pattern, provide the white light of high-luminous-efficiency as backlight to save power consumption, and the color sequence according to picture data under high NTSC pattern provides corresponding coloured light machine-processed with the supply backlight of the color saturation of raising display as backlight, so the present invention does not limit the type of the applied display of backlight module.
In sum, the embodiment of the present invention proposes a kind of display, and it can provide two kinds of display modes with different color saturation degree for audience's choice for use.Under the display mode of low color saturation, the white light that backlight module can provide high-luminous-efficiency as backlight to save the power consumption of display.Under the display mode of high color saturation, the color sequence of the picture data that backlight module can receive according to display panel and provide corresponding coloured light as backlight, thus improve the color saturation of display.Base this, the display of the embodiment of the present invention can utilize suitable display mode to carry out display frame in response to the viewing and admiring demand of audience, thereby takes into account luminescence efficiency and the display quality of display.
Although the present invention discloses as above with embodiment; so it is not in order to limit the present invention; under any, in technical field, have and conventionally know the knowledgeable; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore protection scope of the present invention is when being as the criterion depending on the accompanying claim person of defining.
Claims (12)
1. a display, is characterized in that, comprising:
One display panel;
One backlight module, is disposed at the downside of this display panel, and in order to provide a backlight to give this display panel, wherein this backlight module comprises providing one first light source of one first coloured light, and in order to a secondary light source of one second coloured light to be provided;
One backlight control circuit, couples this backlight module, through setting, control this backlight module operate in one first display mode and one second display mode one of them,
Wherein, when this backlight module operates in this first display mode, this backlight control circuit is controlled this first light source provides this first coloured light as this backlight during a picture, and when this backlight module operates in this second display mode, this backlight control circuit control this first with this secondary light source one first sub picture period in sequentially during this picture and one second sub picture period provide this first with this second coloured light at least one of them as this backlight.
2. display according to claim 1, it is characterized in that, when this backlight module operates in this second display mode, at least this secondary light source is lit in this first sub picture period, at least to provide this second coloured light as this backlight, and this first light source is lit separately in this second sub picture period, to provide this first coloured light as this backlight.
3. display according to claim 2, it is characterized in that, when this backlight module operates in this second display mode, this first light source and this secondary light source are lit in this first sub picture period simultaneously, to provide this first coloured light and this second coloured light as this backlight.
4. display according to claim 2, it is characterized in that, when this backlight module operates in this second display mode, this display panel receives one first color picture data in this first sub picture period, and receives one second color picture data in this second sub picture period.
5. display according to claim 4, it is characterized in that, this first coloured light is white light, this second coloured light is green glow or ruddiness, the corresponding color of this second color picture data is identical with the color of this second coloured light, and this first and the corresponding color of this second color picture data differ from one another.
6. display according to claim 1, it is characterized in that, this second coloured light at least has a First Characteristic peak value and a Second Characteristic peak value, and this First Characteristic peak value is positioned at one first wavelength coverage and this Second Characteristic peak value is positioned at a second wave length scope.
7. display according to claim 6, it is characterized in that, this first wavelength coverage is 400～480 nanometers, and this second wave length scope is 480～620 nanometers, and the spectrum intensity of this First Characteristic peak value is greater than 2.2 divided by the spectrum intensity of this Second Characteristic peak value.
8. display according to claim 6, is characterized in that, this backlight module also comprises:
One filter unit, in order to the energy of this second coloured light of filtering in a wavelength range, wherein this wavelength range and this first wavelength coverage are overlapped.
9. display according to claim 8, is characterized in that, this wavelength range is 420～500 nanometers, and the maximum filtered spectrum intensity of this filter unit is less than 0.7 divided by its minimum filtered spectrum intensity.
10. display according to claim 8, it is characterized in that, this first wavelength coverage is 400～480 nanometers, and this second wave length scope is 480～620 nanometers, and the spectrum intensity of this Second Characteristic peak value is less than 0.62 divided by the spectrum intensity of this First Characteristic peak value.
11. displays according to claim 1, it is characterized in that, also comprise a light conversion layer, when this backlight module operates in this second display mode, first with this secondary light source this first sub picture period, this second sub picture period and one the 3rd sub picture period through control and in sequentially during this picture by this light conversion layer provide this first, this second and 1 the 3rd coloured light at least one of them as this backlight.
12. displays according to claim 11, it is characterized in that, this first light source is lit separately in this first sub picture period, to provide this first coloured light as this backlight by this light conversion layer, this secondary light source is lit separately in this second sub picture period, to provide this second coloured light as this backlight by this light conversion layer, and this first light source and this secondary light source be lit in the 3rd sub picture period simultaneously, to provide the 3rd coloured light as this backlight by this light conversion layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW102132013 | 2013-09-05 | ||
| TW102132013A TWI503812B (en) | 2013-09-05 | 2013-09-05 | Display |
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| Publication Number | Publication Date |
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| CN103680420A true CN103680420A (en) | 2014-03-26 |
| CN103680420B CN103680420B (en) | 2016-03-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310495623.6A Expired - Fee Related CN103680420B (en) | 2013-09-05 | 2013-10-21 | Display device |
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| TW (1) | TWI503812B (en) |
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| CN106773318A (en) * | 2016-10-18 | 2017-05-31 | 友达光电股份有限公司 | Display device |
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| CN109493815A (en) * | 2018-12-07 | 2019-03-19 | 友达光电股份有限公司 | Display device and backlight driving method |
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| KR102451309B1 (en) | 2017-10-31 | 2022-10-05 | 엘지디스플레이 주식회사 | Backlight unit and liquid crystal display using the same |
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Also Published As
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| TWI503812B (en) | 2015-10-11 |
| CN103680420B (en) | 2016-03-09 |
| TW201510977A (en) | 2015-03-16 |
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