CN103943071A - Backlight local control display device and terminal device - Google Patents
Backlight local control display device and terminal device Download PDFInfo
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- CN103943071A CN103943071A CN201310018040.4A CN201310018040A CN103943071A CN 103943071 A CN103943071 A CN 103943071A CN 201310018040 A CN201310018040 A CN 201310018040A CN 103943071 A CN103943071 A CN 103943071A
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Abstract
The invention provides a display device. The display device is characterized in that the display device comprises a backlight unit which comprises a light guide plate, and is used for providing a backlight for the display device, a transmittance and reflectance controllable film which comprises a number of array units, and is used for carrying out regional control on the backlight, an optical modulation layer which has a number of pixel units, and is used for modulating a light from the transmittance and reflectance controllable film, and a control unit which is connected with a number of array units of the transmittance and reflectance controllable film, and is used for controlling the array units of the transmittance and reflectance controllable film to switch between different states according to a display content. The transmittance and reflectance controllable film is located between the backlight unit and the optical modulation layer. Through the configuration, the display device provided by the invention can dynamically control the backlight to realize backlight regional control, which enhances the dynamic contrast, reduces power consumption and improves the image quality.
Description
Technical field
The present invention relates to a kind of display device backlight and terminal device controlled, more particularly, relate to a kind of Partial controll display device backlight and terminal device.
Background technology
In traditional display device, owing to using uniform backlight, no matter show any picture, backlight is all bright all the time, as shown in Figure 1, for the demonstration of the image in Fig. 1, in traditional display technique, the backlight of 101He clear zone, dark space 102 is all light yellow, so just there are the following problems: for dark space 101, we do not need or only need a small amount of backlight, and in fact its backlight intensity is the same with white area 102, can cause like this waste backlight and dark space light leak.Not only wasted power consumption but also reduced image quality; For clear zone, we wish that it is brighter, thereby improve contrast, promote image quality, and general technology can only improve Integral back luminance brightness, has increased power consumption.
Meanwhile, in current display technique, HDR(high dynamic range, high dynamic range) technology just becoming more and more fields of paying close attention to that are subject to.Dynamic range refers to the maximum brightness part of scene and the minimum ratio of measuring the light intensity between part of scene.For example, the mankind's vision system can be identified has the very scene of high dynamic range, yet liquid crystal display, owing to being limited to its know-why, cannot be reappeared the mode reproduced image of high dynamic range with loyalty, and this has affected image quality to a certain extent.
Existing solution is to process providing light guide plate backlight to do strip, send light emitting diode backlight (LED) corresponding with leaded light lath, thereby can control the light intensity of strip light guide plate, when the picture dark space showing is many, we can realize the lifting of contrast and the saving of power consumption by controlling the light intensity of corresponding strip light guide plate.But the light intensity in that this scheme can only be controlled a strip or large region, cannot control light intensity more among a small circle.For example, if the backlight of the 101He clear zone, dark space 102 in Fig. 1 provided by same leaded light lath, still cannot solve the above-mentioned problem of not only having wasted power consumption but also having reduced image quality.
As can be seen here, how can be more subtly to backlightly dynamically controlling, strengthen the dynamic contrast of image, the image quality that promotes image when reducing equipment power dissipation is problem demanding prompt solution in prior art.
Summary of the invention
In order to solve above-mentioned technical matters of the prior art, according to an aspect of the present invention, provide a kind of display device, it is characterized in that, comprising: back light unit, comprise light guide plate, be used to display device to provide backlight; Transmissivity and reflectivity can controlling diaphragms, comprise a plurality of array elements, for realizing, described regionality backlight controlled; Optical modulation layer, has a plurality of pixel cells, and for modulate can controlling diaphragm from transmissivity and reflectivity light; And control module, a plurality of array elements that can controlling diaphragm with described transmissivity and reflectivity are connected, for control the described array element that described transmissivity and reflectivity can controlling diaphragm according to displaying contents, between different conditions, change, wherein, described transmissivity and reflectivity can controlling diaphragm between described back light unit and described optical modulation layer.
In addition, according to one embodiment of present invention, described transmissivity and reflectivity can be made by Transflective switchable film or photon crystal material by controlling diaphragm.
In addition, according to one embodiment of present invention, described state comprises the first state and the second state; Array element in described the first state, makes to be irradiated to the array element seeing through in described the second state backlight of array element in described the first state; And the array element in described the second state, by what be irradiated to array element in described the second state, be backlightly reflected back described light guide plate.
In addition, according to one embodiment of present invention, the array element number that described transmissivity and reflectivity can controlling diaphragms is less than or equal to the pixel count of described optical modulation layer.
In addition, according to one embodiment of present invention, described photon crystal material is voltage regulate crystal or electric current regulate crystal, and the state of each array element that can controlling diaphragm to described transmissivity and reflectivity by voltage or current signal by control module is controlled.
In addition, according to one embodiment of present invention, described control module is carried out following operation: detection display content; Based on displaying contents, distinguish clear zone and the dark space of described displaying contents, the region of described clear zone for strengthening light, the region of described dark space for weakening light; And the state of the control array element corresponding with position, described clear zone is described the first state, what make to be irradiated to described corresponding with position, clear zone array element backlightly sees through array element described and that clear zone is corresponding; Meanwhile, the state of controlling the array element corresponding with position, described dark space is described the second state, make the described array element corresponding with position, dark space by be irradiated to the array element corresponding with position, described dark space be backlightly reflected back described light guide plate.
In addition, according to one embodiment of present invention, described control module is distinguished the clear zone of described displaying contents and the step of dark space based on displaying contents and is comprised and from video card, obtain a two field picture, obtain brightness and the colouring information of described image, according to described brightness and colouring information, described displaying contents is distinguished.
According to a further aspect in the invention, provide a kind of terminal device, comprise display device, it is characterized in that, described display device comprises: back light unit, comprise light guide plate, and be used to display device to provide backlight; Transmissivity and reflectivity can controlling diaphragms, comprise a plurality of array elements, for realizing, described regionality backlight controlled; Optical modulation layer, has a plurality of pixel cells, and for modulate can controlling diaphragm from transmissivity and reflectivity light; And control module, a plurality of array elements that can controlling diaphragm with described transmissivity and reflectivity are connected, for control the described array element that described transmissivity and reflectivity can controlling diaphragm according to displaying contents, between different conditions, change, wherein, described transmissivity and reflectivity can controlling diaphragm between described back light unit and described optical modulation layer.
In addition, according to one embodiment of present invention, described transmissivity and reflectivity can be made by Transflective switchable film or photon crystal material by controlling diaphragm.
In addition, according to one embodiment of present invention, described state comprises the first state and the second state; Array element in described the first state, makes to be irradiated to the array element seeing through in described the second state backlight of array element in described the first state; And the array element in described the second state, by what be irradiated to array element in described the second state, be backlightly reflected back described light guide plate.
In addition, according to one embodiment of present invention, the array element number that described transmissivity and reflectivity can controlling diaphragms is less than or equal to the pixel count of described optical modulation layer.
In addition, according to one embodiment of present invention, described photon crystal material is voltage regulate crystal or electric current regulate crystal, and the state of each array element that can controlling diaphragm to described transmissivity and reflectivity by voltage or current signal by control module is controlled.
In addition, according to one embodiment of present invention, described control module is carried out following operation: detection display content; Based on displaying contents, distinguish clear zone and the dark space of described displaying contents, the region of described clear zone for strengthening light, the region of described dark space for weakening light; And the state of the control array element corresponding with position, described clear zone is described the first state, what make to be irradiated to described corresponding with position, clear zone array element backlightly sees through array element described and that clear zone is corresponding; Meanwhile, the state of controlling the array element corresponding with position, described dark space is described the second state, make the described array element corresponding with position, dark space by be irradiated to the array element corresponding with position, described dark space be backlightly reflected back described light guide plate.
In addition, according to one embodiment of present invention, described control module is distinguished the clear zone of described displaying contents and the step of dark space based on displaying contents and is comprised and from video card, obtain a two field picture, obtain brightness and the colouring information of described image, according to described brightness and colouring information, described displaying contents is distinguished.
As can be seen here, because display device provided by the invention and terminal device can regulate the back of the body light intensity that incides optical modulation layer little within the scope of the Pixel-level of optical modulation layer.So, to compare with display device of the prior art, the display device of terminal device provided by the invention and terminal device can be controlled the back of the body light intensity that incides optical modulation layer more subtly, realize high dynamic range and show, have promoted image quality; Simultaneously due to transmissivity and reflectivity can controlling diaphragm reflection backlightly can incide clear zone by the diffuse reflection of light guide plate and recycle, improved utilization ratio backlight, saved power consumption.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, will the accompanying drawing of required use in the description of embodiment be briefly described below.Accompanying drawing in the following describes is only exemplary embodiment of the present invention:
Fig. 1 shows the schematic diagram that shows the 101He clear zone, dark space 102 in image in existing display technique;
Fig. 2 shows according to the exemplary block diagram of the display device 200 of the embodiment of the present invention;
Fig. 3 shows exemplary block diagram that can controlling diaphragm 220 according to the transmissivity of the display device 200 of the embodiment of the present invention and reflectivity;
Fig. 4 shows the schematic diagram to control situation backlight according to two adjacent array element in the first state of the embodiment of the present invention;
Fig. 5 shows the schematic diagram of two adjacent array element in the first state and the second state respectively to control situation backlight according to the embodiment of the present invention;
Fig. 6 shows the process flow diagram of the operation 600 of carrying out according to the control module 240 of the embodiment of the present invention;
Fig. 7 shows according to the exemplary block diagram of the terminal device 700 of the embodiment of the present invention.
Embodiment
Hereinafter, with reference to accompanying drawing, describe the preferred embodiments of the present invention in detail.Note, in this instructions and accompanying drawing, there is substantially the same step and represent with identical Reference numeral with element, and will be omitted the repetition of explanation of these steps and element.
Below, with reference to Fig. 2, the display device according to the embodiment of the present invention is described.Fig. 2 shows the display device 200 backlight according to the Partial controll of the embodiment of the present invention, comprising: back light unit 210, transmissivity and reflectivity can controlling diaphragms 220, optical modulation layer 230 and control module 240.
Particularly, back light unit 210 comprises light guide plate, is used to display device 200 to provide backlight.For example, described light guide plate can comprise a plurality of light emitting diodes (LED), and it can be arranged in the mode of strip or array.Back light unit 210 can also comprise an optical system, and this system comprises one or more catoptron, lens or other element, and they are cooperated with each other provides backlight for display device 100.In one embodiment, LED can be used the type of sending white light, and for example, LED can comprise three-color LED array, be encapsulated in to comprise respectively redness, green and blue three-color LED within single shell, thereby at spacing color mixed synthesize white light.
In another embodiment, LED can be used the adjustable type of color, for example, LED can be by regulating such as voltage, voltage based on applied is different, send respectively redness, green and blue light, thereby within the short time of human eye indistinguishable, send respectively the light of three kinds of colors, thereby colour mixture synthesizes the white light that human eye can be seen in time.
In the present invention, can provide backlight substantially uniformly for display device 100 with the LED of one or more the above-mentioned type, yet, the included LED number of back light unit 210 is more much smaller than the number of pixels of optical modulation layer 230 to be described in detail below, therefore, light guide plate in back light unit 210 can only regulate the brightness of image in larger regional extent, is difficult to the demonstration that relies on back light unit 210 to realize the high-fineness of the high dynamic range of image.
Transmissivity and reflectivity can controlling diaphragms 220, comprise a plurality of array elements, for realizing, described regionality backlight controlled.Described transmissivity and reflectivity can 220 pairs of visible rays of controlling diaphragm transmissivity and reflectivity can control by control signals such as current signal or voltage signals.The region that needs different light rays intensity for display device 200 shown images, for example, need to strengthen the clear zone of light and the dark space that need to weaken light, by control that transmissivity and reflectivity can controlling diaphragm 220 corresponding to dark space from the different array elements in clear zone to transmissivity backlight and reflectivity, just can improve the contrast of clear zone and dark space.
In one embodiment, described transmissivity and reflectivity can be made by Transflective switchable film by controlling diaphragm 220.Described Transflective switchable film can be switched between the state of visible light transmissive and the state of reflect visible light, can to Transflective switchable film, control by control signals such as electric current or voltages.Particularly, dark space and clear zone for display device 200 shown images, by controlling respectively switching between different states from the different array elements in clear zone corresponding to dark space of Transflective switchable film, just can dynamic area property control backlight, improve the contrast of clear zone and dark space, realize high dynamic range and show.
In another embodiment, described transmissivity and reflectivity can also be used photonic crystal to make by controlling diaphragm 220.Photonic crystal refers to have photon band gap (PhotonicBand-Gap, referred to as PBG) the artificial periodic dielectric structure of characteristic, cyclical variation by the exponent of refractive index of light in photonic crystal has produced optical band gap structure, thereby the motion of light in photonic crystal in optical band gap structure control, thereby the light that can reflection frequency falls into optical band gap, photonic crystal can reflect the light of certain frequency.The present invention preferably uses adjustable photonic crystal, and the crystal structure of described adjustable photonic crystal can be changed under extra electric field and magnetic field control, thereby can change the light frequency that photonic crystal can reflect.Particularly, can use voltage regulate crystal or electric current regulate crystal, the light frequency that this crystal can reflect when not pressurizeing or disconnecting electric current is the frequency range beyond visible rays such as ultraviolet band, infrared band, and pressurize or connect the light frequency that can reflect after certain electric current, can belong to visible light frequency band.Thereby the state of each array element that can controlling diaphragm to described transmissivity and reflectivity by voltage signal or current signal is controlled.
More specifically, in one embodiment, if LED comprises three-color LED array, be encapsulated in and comprise respectively redness within single shell, green and blue three-color LED is at spacing color mixed synthesize white light, each array element that now transmissivity and reflectivity can controlling diaphragms 220 can comprise respectively three layers of crystal film with photon, now, three layers of crystal film with photon that form each array element are set to: while not pressurizeing, electromagnetic wave outside reflect visible light frequency range, for example, infrared portion electromagnetic wave, now, three layers of crystal film with photon can make visible ray see through completely, when to comprising that the array element of these three layers of crystal film with photon applies after voltage, make their reflection Reds respectively, the visible ray of green and blue frequency bands, thereby under these three layers of crystal film with photon actings in conjunction, the array element that comprises these three layers of crystal film with photon can reflect LED at spacing color mixed synthetic white backlight.
In another embodiment, if LED is used the adjustable type of color, different based on added voltage, send respectively redness, green and blue light, thereby use, within the short time of human eye indistinguishable, send respectively the light of three kinds of colors, in the time of now can making each array element photonic crystal that transmissivity and reflectivity can controlling diaphragm 220 and be set to not pressurize, electromagnetic wave outside reflect visible light frequency range, for example, electromagnetic infrared wave, now the crystal film with photon of each array element can make visible ray see through completely, when the crystal film with photon of pair array unit applies three different voltage within the short time of human eye indistinguishable, this array element is distinguished correspondingly reflection Red successively, green and blue light, thereby the LED that reflection human eye can be seen is by the synthetic white backlight of time mixing color.
Optical modulation layer 230, can have a plurality of pixel cells, for modulate can controlling diaphragm 220 from transmissivity and reflectivity light, to show image to beholder.Particularly, optical modulation layer 230 can comprise the photomodulator that light is polarized.For example, optical modulation layer 230 can comprise the LCD plate with a plurality of pixels, and each pixel comprises a plurality of coloured sub-pixels.For instance, each pixel can comprise three sub-pixels, one of them is associated with red filter, one be associated with green filter, one be associated with blue electric-wave filter.Described wave filter can integrate with LCD panel.
Control module 240, a plurality of array elements that can controlling diaphragm 220 with described transmissivity and reflectivity are connected, for control the described array element that described transmissivity and reflectivity can controlling diaphragm 220 according to displaying contents, between different conditions, change, wherein, described transmissivity and reflectivity can controlling diaphragm 220 between described back light unit 210 and described optical modulation layer 230.Particularly, described transmissivity and reflectivity can controlling diaphragm 220 can be by controlling from the control signal of control module 240, to the image with high dynamic range is provided to beholder.For example, control module 240 can be by using the state of each array element that voltage or current signal can controlling diaphragm 220 to described transmissivity and reflectivity to control, and controls each array element that described transmissivity and reflectivity can controlling diaphragm 220 change between different conditions according to displaying contents.Control module 240 can comprise that any suitable data processor or one or more operation suitably control the microprocessor of software, and allows control module 240 according to the present invention, to control each interface of display operation.The ordinary construction of this type of control module and for this quasi-controller of programming to provide the general technology of desired function well known to those skilled in the art, will this be described in detail herein.
Below, with reference to Fig. 3, describing in detail can controlling diaphragm 220 according to the transmissivity that comprises a plurality of array elements of the embodiment of the present invention and reflectivity.Fig. 3 shows structural representation that can controlling diaphragm 220 according to the transmissivity of the embodiment of the present invention and reflectivity.As shown in the figure, transmissivity and reflectivity can comprise a plurality of array elements by controlling diaphragm 220, for example, and array element 221,222,223,224 etc.Wherein, array element 221 and array element 223 are corresponding to the dark space that needs low-light level of the shown image of optical modulation layer 230, and array element 222 and array element 224 are corresponding to the clear zone that needs high brightness of the shown image of optical modulation layer 230.In addition, array element number that can controlling diaphragm 220 according to transmissivity of the present invention and reflectivity can be less than or equal to the pixel count of described optical modulation layer 230, be each array element (for example, array element 221,222,223,224 etc.) each in can be corresponding to one or more pixel of optical modulation layer 230.
The state of the array element that in one embodiment, transmissivity and reflectivity can controlling diaphragms 220 can comprise the first state and the second state.Array element in described the first state, for example, the array element that transmissivity and reflectivity can controlling diaphragms 220 does not pressurize or during access failure electric current, and the visible ray that back light unit sends can see through the array element that described transmissivity and reflectivity can controlling diaphragms 220; Array element in described the second state, for example, the array element pressurization that transmissivity and reflectivity can controlling diaphragms 220 or connect after certain electric current, the visible ray that back light unit can be sent is reflected back the light guide plate of described back light unit.
For example, Fig. 4 shows two adjacent array element 221 in the first state according to the embodiment of the present invention, the schematic diagram of 222 pairs of control situations backlight, wherein, array element 221,222 can correspond respectively to two pixel cells 231,232 of optical modulation layer 230, and pixel cell 231,232 shows the clear zone of image simultaneously.As shown in the figure, now, array element 221,222 can be all not pressurize or access failure electric current, and back light unit 210 sends backlight 410 sees through respectively the pixel cell 231,232 that array element 221,222 incides the demonstration image clear zone of optical modulation layer 230.
On the other hand, Fig. 5 shows two adjacent array element 223 in the second state and the first state respectively according to the embodiment of the present invention, the schematic diagram of 224 pairs of control situations backlight, wherein, array element 223,224 can correspond respectively to two pixel cells 233,234 of optical modulation layer 230, pixel cell 233 shows the dark space of image, and pixel cell 233 shows the clear zone of image.As shown in the figure, array element 223 can be pressurization or connect after certain electric current in the second described state, and array element 224 can be do not pressurize or during access failure electric current in the first state, now, the light backlight 510 that array element 223 can send back light unit 210 is reflected back the light guide plate of back light unit 210, due to light guide plate surface irregularity, the light being reflected back from array element 223 penetrates with light 520 light guide plate surface can diffuse reflection occur, together with the light backlight 530 sending with back light unit 210, incide array element 224, the array element 224 seeing through in the first state incides the pixel cell 234 that shows clear zone, visible, display device 200 according to an embodiment of the invention, not only can weaken the light that incides dark space, strengthen the light that incides clear zone, to improve picture contrast, meanwhile, all visible rays that can also utilize more fully back light unit 210 to send, have improved the utilization ratio of the energy, and then have saved power consumption.
Below, with reference to Fig. 6, describe according to the control module 240 of the embodiment of the present invention and control according to displaying contents the operation 600 that described array element that described transmissivity and reflectivity can controlling diaphragm 220 is changed between different conditions.Fig. 6 shows and according to the control module 240 of the embodiment of the present invention, according to displaying contents, controls the process flow diagram of the operation 600 that described transmissivity and reflectivity can controlling diaphragm 220.
As shown in Figure 6, in step S610, control module 240 obtains and detection display content.Particularly, for example, control module 240 can be from obtaining the related data information of a two field picture such as the Graphics Processing Unit video card.
Next, in step S620, control module 240 is distinguished clear zone and the dark space of described displaying contents based on displaying contents, the region of described clear zone for strengthening light, the region of described dark space for weakening light.Particularly, control module 240 can be according to obtain the related data information of a two field picture from Graphics Processing Unit, the for example colouring information of described image, monochrome information etc., described content to be displayed is distinguished, described content to be displayed is divided into clear zone and dark space, need to strengthen the region of light and the region that need to weaken light.
Then, in step S630, the state that control module 240 can be controlled the array element corresponding with position, described clear zone is described the first state, makes to be irradiated to the backlight through the array element corresponding with clear zone of the array element corresponding with position, clear zone.Particularly, for example, control module 240 can be controlled the array element 221 corresponding with position, described clear zone as shown in Figure 4,222 state is the first state, thereby be irradiated to the backlight of array element 221,222 and can see through the array element 221,222 corresponding with the clear zone that shows image, incide respectively the pixel cell 231,232 of optical modulation layer.
Simultaneously, in step S630, the state that control module 240 can also be controlled the array element corresponding with position, described dark space is described the second state, make the described array element corresponding with position, dark space by be irradiated to the array element corresponding with position, described dark space be backlightly reflected back described light guide plate.Particularly, for example, the state that control module 240 can be controlled the array element corresponding with position, dark space 223 is as shown in Figure 5 respectively the second state, make the light backlight 510 that is irradiated to array element 223 be reflected back light guide plate, due to light guide plate surface irregularity, the light being reflected back from array element 223 penetrates with light 520 diffuse reflection occurs on light guide plate surface, incide array element 224 together with light 530 backlight, the array element 224 seeing through in the first state incides the pixel cell 234 that shows clear zone, thereby further strengthen the brightness in the clear zone of the shown image of pixel cell 234.
As can be seen here, because display device 200 can regulate the back of the body light intensity that incides optical modulation layer little within the scope of the Pixel-level of optical modulation layer 230.So, to compare with display device of the prior art, display device 200 provided by the invention can be controlled the back of the body light intensity that incides optical modulation layer more subtly, and then realizes high dynamic range demonstration; Simultaneously due to transmissivity and reflectivity can controlling diaphragm 220 reflections backlightly can incide clear zone by the diffuse reflection of light guide plate and recycle, further strengthen contrast, promote image quality, improved utilization ratio backlight simultaneously, saved power consumption.
In addition, the present invention also provides a kind of terminal device 700 on the other hand, Fig. 7 shows according to the demonstrative structure block diagram of the Partial controll of embodiment of the present invention terminal device 700 backlight, terminal device 700 comprises the display device 200 that high dynamic range shows that realizes provided by the invention, and described display device 200 comprises: back light unit 210, transmissivity and reflectivity can controlling diaphragms 220, optical modulation layer 230 and control module 240.
Particularly, back light unit 210 comprises light guide plate, is used to display device to provide backlight.Transmissivity and reflectivity can controlling diaphragms 220, comprise a plurality of array elements, for realizing, described regionality backlight controlled.In one embodiment, described transmissivity and reflectivity can be made by aforesaid Transflective switchable film by controlling diaphragm 220.In another embodiment, described transmissivity and reflectivity can also be used aforesaid photonic crystal to make by controlling diaphragm 220.Optical modulation layer 230, can have a plurality of pixel cells, for modulate can controlling diaphragm 220 from transmissivity and reflectivity light.Control module 240, a plurality of array elements that can controlling diaphragm 220 with described transmissivity and reflectivity are connected, for control the described array element that described transmissivity and reflectivity can controlling diaphragm 220 according to displaying contents, between different conditions, change, wherein, described transmissivity and reflectivity can controlling diaphragm 220 between described back light unit 210 and described optical modulation layer 230.Described photon crystal material can be voltage regulate crystal or the adjustable photonic crystal of electric current, and now, the state of each array element that can controlling diaphragm 220 to described transmissivity and reflectivity by voltage or current signal by control module 240 is controlled.
The state of the array element that in one embodiment, transmissivity and reflectivity can controlling diaphragms 220 can comprise the first state and the second state.Array element in described the first state, for example, the array element that transmissivity and reflectivity can controlling diaphragms 220 does not pressurize or during access failure electric current, the array element that can see through described photonic crystal backlight that back light unit 210 sends; Array element in described the second state, for example, the array element pressurization that transmissivity and reflectivity can controlling diaphragms 220 or connect after certain electric current, the visible ray that back light unit 210 can be sent is reflected back the light guide plate of described back light unit 210.
Fig. 6 shows the process flow diagram of controlling the operation 600 that described transmissivities and reflectivity can controlling diaphragm 220 according to the control module 240 of embodiment of the present invention terminal device 700.As shown in Figure 6, in step S610, control module 240 obtains and detection display content.Particularly, for example, control module 240 can be from obtaining the related data information of a two field picture such as the Graphics Processing Unit video card.
Next, in step S620, control module 240 can be distinguished based on displaying contents clear zone and the dark space of described displaying contents, the region of described clear zone for strengthening light, the region of described dark space for weakening light.Particularly, control module 240 can be according to obtain the related data information of a two field picture from Graphics Processing Unit, the for example colouring information of described image, monochrome information etc., described content to be displayed is distinguished, described content to be displayed is divided into clear zone and dark space, need to strengthen the region of light and the region that need to weaken light.
Then, in step S630, the state that control module 240 can be controlled the array element corresponding with position, described clear zone is described the first state, makes to be irradiated to the backlight through the described array element corresponding with clear zone of described corresponding with position, clear zone array element.Simultaneously, in step S630, the state that control module 240 can also be controlled the array element corresponding with position, described dark space is described the second state, make the described array element corresponding with position, dark space by be irradiated to the array element corresponding with position, described dark space be backlightly reflected back described light guide plate.
As can be seen here, because terminal device 700 provided by the invention can regulate the back of the body light intensity that incides optical modulation layer little within the scope of the Pixel-level of optical modulation layer 230.So, to compare with terminal device of the prior art, the display device 200 of terminal device 700 can be controlled the back of the body light intensity that incides optical modulation layer more subtly, realizes high dynamic range and shows, has promoted image quality; Simultaneously due to transmissivity and reflectivity can controlling diaphragm 220 reflections backlightly can incide clear zone by the diffuse reflection of light guide plate and recycle, improved utilization ratio backlight, saved power consumption.
Those of ordinary skills can recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Those skilled in the art can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
It should be appreciated by those skilled in the art that can be dependent on design requirement and other factors carries out various modifications, combination, part combination and replace the present invention, as long as they are in the scope of appended claims and equivalent thereof.
Claims (14)
1. a display device, is characterized in that, comprising:
Back light unit, comprises light guide plate, is used to display device to provide backlight;
Transmissivity and reflectivity can controlling diaphragms, comprise a plurality of array elements, for realizing, described regionality backlight controlled;
Optical modulation layer, has a plurality of pixel cells, and for modulate can controlling diaphragm from transmissivity and reflectivity light; With
Control module, a plurality of array elements that can controlling diaphragm with described transmissivity and reflectivity are connected, for control the described array element that described transmissivity and reflectivity can controlling diaphragm according to displaying contents, between different conditions, change,
Wherein, described transmissivity and reflectivity can controlling diaphragm between described back light unit and described optical modulation layer.
2. display device as claimed in claim 1, is characterized in that, described transmissivity and reflectivity can be made by Transflective switchable film or photon crystal material by controlling diaphragm.
3. display device as claimed in claim 1, is characterized in that, described state comprises the first state and the second state;
Array element in described the first state, makes to be irradiated to the array element seeing through in described the second state backlight of array element in described the first state; And
Array element in described the second state, is backlightly reflected back described light guide plate by what be irradiated to array element in described the second state.
4. display device as claimed in claim 1, is characterized in that, the array element number that described transmissivity and reflectivity can controlling diaphragms is less than or equal to the pixel count of described optical modulation layer.
5. display device as claimed in claim 2, it is characterized in that, described photon crystal material is voltage regulate crystal or the adjustable photonic crystal of electric current, and the state of each array element that can controlling diaphragm to described transmissivity and reflectivity by voltage or current signal by control module is controlled.
6. display device as claimed in claim 3, is characterized in that, described control module is carried out following operation:
Detection display content;
Based on displaying contents, distinguish clear zone and the dark space of described displaying contents, the region of described clear zone for strengthening light, the region of described dark space for weakening light; And
The state of controlling the array element corresponding with position, described clear zone is described the first state, makes to be irradiated to the backlight through the described array element corresponding with clear zone of described corresponding with position, clear zone array element; Meanwhile, the state of controlling the array element corresponding with position, described dark space is described the second state, make the described array element corresponding with position, dark space by be irradiated to the array element corresponding with position, described dark space be backlightly reflected back described light guide plate.
7. display device as claimed in claim 6, it is characterized in that, described control module is distinguished the clear zone of described displaying contents and dark space based on displaying contents and is comprised and from video card, obtain a two field picture, obtain brightness and the colouring information of described image, according to described brightness and colouring information, described displaying contents is distinguished.
8. a terminal device, comprises display device, it is characterized in that, described display device comprises:
Back light unit, comprises light guide plate, is used to display device to provide backlight;
Transmissivity and reflectivity can controlling diaphragms, comprise a plurality of array elements, for realizing, described regionality backlight controlled;
Optical modulation layer, has a plurality of pixel cells, and for modulate can controlling diaphragm from transmissivity and reflectivity light; With
Control module, a plurality of array elements that can controlling diaphragm with described transmissivity and reflectivity are connected, for control the described array element that described transmissivity and reflectivity can controlling diaphragm according to displaying contents, between different conditions, change,
Wherein, described transmissivity and reflectivity can controlling diaphragm between described back light unit and described optical modulation layer.
9. terminal device as claimed in claim 8, is characterized in that, described transmissivity and reflectivity can be made by Transflective switchable film or photon crystal material by controlling diaphragm.
10. terminal device as claimed in claim 8, is characterized in that, described state comprises the first state and the second state;
Array element in described the first state, makes to be irradiated to the array element seeing through in described the first state backlight of array element in described the first state; And
Array element in described the second state, is backlightly reflected back described light guide plate by what be irradiated to array element in described the second state.
11. terminal devices as claimed in claim 8, is characterized in that, the array element number that described transmissivity and reflectivity can controlling diaphragms is less than or equal to the pixel count of described optical modulation layer.
12. terminal devices as claimed in claim 9, it is characterized in that, described photon crystal material is voltage regulate crystal or the adjustable photonic crystal of electric current, and the state of each array element that can controlling diaphragm to described transmissivity and reflectivity by voltage or current signal by control module is controlled.
13. terminal devices as claimed in claim 10, is characterized in that, described control module is carried out following operation:
Detection display content;
Based on displaying contents, distinguish clear zone and the dark space of described displaying contents, the region of described clear zone for strengthening light, the region of described dark space for weakening light; And
The state of controlling the array element corresponding with position, described clear zone is described the first state, makes to be irradiated to the backlight through the described array element corresponding with clear zone of described corresponding with position, clear zone array element; Meanwhile, the state of controlling the array element corresponding with position, described dark space is described the second state, make the described array element corresponding with position, dark space by be irradiated to the array element corresponding with position, described dark space be backlightly reflected back described light guide plate.
14. terminal devices as claimed in claim 13, it is characterized in that, described control module is distinguished the clear zone of described displaying contents and dark space based on displaying contents and is comprised and from video card, obtain a two field picture, obtain brightness and the colouring information of described image, according to described brightness and colouring information, described displaying contents is distinguished.
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