CN112068354A - Display device and control method thereof - Google Patents

Display device and control method thereof Download PDF

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Publication number
CN112068354A
CN112068354A CN202010947033.2A CN202010947033A CN112068354A CN 112068354 A CN112068354 A CN 112068354A CN 202010947033 A CN202010947033 A CN 202010947033A CN 112068354 A CN112068354 A CN 112068354A
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CN
China
Prior art keywords
light source
light
display device
driving module
display
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Pending
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CN202010947033.2A
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Chinese (zh)
Inventor
王学辉
樊伟锋
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InfoVision Optoelectronics Kunshan Co Ltd
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InfoVision Optoelectronics Kunshan Co Ltd
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Priority to CN202010947033.2A priority Critical patent/CN112068354A/en
Publication of CN112068354A publication Critical patent/CN112068354A/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133603—Direct backlight with LEDs
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133602—Direct backlight
    • G02F1/133605—Direct backlight including specially adapted reflectors
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals

Abstract

The invention provides a display device and a control method thereof, wherein the display device comprises a backlight module, a display panel, a driving module and a control module, and the driving module can receive a control signal of the control module to enable the display device to realize a wide viewing angle display mode or a narrow viewing angle display mode. The backlight module comprises a first light source component, a second light source component and a light-transmitting reflecting device, wherein the light-transmitting reflecting device is erected between the first light source component and the second light source component. The display device and the control method thereof provided by the invention solve the problem that the display device in the prior art can not simultaneously meet the conventional brightness requirement in a wide view angle mode and the higher brightness requirement in a narrow view angle mode, and utilize the difference of incident light processing modes of the light-transmitting and reflecting device in different working states to match with the working states of the side-in light source and the direct-type light source which respectively and independently control the backlight module, so that the display device can meet the conventional brightness requirement in the wide view angle and can also meet the high brightness requirement in the narrow view angle.

Description

Display device and control method thereof
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device and a control method thereof.
Background
In the prior art, the backlight module of the lcd device is usually designed as a single light source, and as shown in fig. 1, it is a sectional view of the backlight module of a common household display device in the prior art, the common household display device herein is usually a tablet computer, a desktop notebook or a monitor, and the light source of the backlight module is usually designed as a side-in light source (121a), and as shown in fig. 2, it is a sectional view of the backlight module of an industrial display device in the prior art, the light source of the backlight module is usually designed as a direct-down light source (130 a). However, the backlight module design in fig. 1 often causes poor viewing angle effect of the display device in the narrow viewing angle mode due to low transmittance of the display device in the narrow viewing angle mode, and even if a special backlight module capable of providing higher luminance is adopted, the luminance of the display device is difficult to meet the requirement of higher luminance (e.g. 1500 nits). In contrast, the direct light source arrangement shown in fig. 2 has a higher light transmittance in the wide viewing angle mode than in the narrow viewing angle mode.
Therefore, how to design the light source can meet the requirements of both the low brightness and the high brightness at the wide and narrow viewing angles is a problem to be solved.
Disclosure of Invention
The present invention is directed to a display device and a control method thereof, so as to solve the problem that the display device in the prior art cannot simultaneously satisfy the lower brightness requirement in the wide viewing angle mode and the higher brightness requirement in the narrow viewing angle mode.
The technical problem to be solved by the invention is realized by adopting the following technical scheme.
The invention provides a display device, which comprises a backlight module and a display panel, wherein the display panel is arranged opposite to the backlight module, the backlight module comprises a first light source component, a second light source component and a light-transmitting reflecting device, the light-transmitting reflecting device is clamped between the first light source component and the second light source component, and the first light source component is arranged on one side, close to the display device, of the backlight module;
the light transmitting and reflecting device comprises a switching type optical film layer structure and a light path deflection structure, wherein the switching type optical film layer structure is provided with a transparent mode which receives a first voltage and does not scatter light and a scattering mode which receives a second voltage and scatters light;
when the display device realizes wide-view angle display, the switching type optical film layer structure is in a scattering mode, and light rays emitted by the first light source component are reflected into the display panel by the switching type optical film layer structure;
when the display device realizes narrow-view angle display, the switching type optical film layer structure is in a transparent mode, and light rays emitted by the second light source component pass through the switching type optical film layer structure after being deflected in the light path deflection structure and enter the display panel.
Further, the first light source assembly comprises a first light source, and a light guide plate, a first diffusion sheet, a lens and a second diffusion sheet which are sequentially stacked, wherein the first light source is arranged on the side surface of the light guide plate.
Further, the second light source assembly includes a base plate and a second light source disposed on the base plate.
Further, the second light source comprises a plurality of Mini LEDs arranged in an array.
Further, the light transmission reflecting device further comprises a first polarizer and a second polarizer, the first polarizer is clamped between the switching type optical film layer structure and the light path deflection structure, and the second polarizer is positioned between the switching type optical film layer structure and the display panel.
Furthermore, the first polarizer is a reflective polarizer, one surface of the first polarizer, which is close to the switching optical film structure, is a reflective surface, and one surface of the first polarizer, which is close to the optical path deflection structure, is a light-transmitting surface.
Further, the optical path deflecting structure is a louver film.
Further, the display device also comprises a driving module and a control module; the driving module comprises a display driving module, a first light source driving module, a light-transmitting reflecting device driving module and a second light source driving module; the first light source driving module, the light transmitting and reflecting device driving module and the second light source driving module can receive the control signal of the control module and respectively control the working states of the first light source, the light transmitting and reflecting device and the second light source correspondingly.
The invention also provides a control method of the display device, which comprises the following steps: the control driving module receives the control signal of the control module to enable the display device to realize wide visual angle display or narrow visual angle display;
when the first light source driving module controls the first light source to be in a working state, the light transmitting and reflecting device driving module controls the light transmitting and reflecting device to be in a non-working state and the second light source driving module controls the second light source to be in a non-working state, the display device realizes wide-view angle display;
when the light-transmitting reflecting device driving module controls the light-transmitting reflecting device to be in a working state, the second light source driving module controls the second light source to be in a working state, and the first light source driving module controls the first light source to be in a non-working state, the display device realizes narrow visual angle display.
Further, when the light transmission and reflection device driving module is in a working state, the switching type optical film structure is in a transparent mode of receiving a first voltage and not scattering light, and when the light transmission and reflection device driving module is in a non-working state, the switching type optical film structure is in a scattering mode of receiving a second voltage and scattering light.
The display device and the control method thereof provided by the invention solve the problem that the display device in the prior art cannot simultaneously meet the lower brightness requirement in the wide viewing angle mode and the higher brightness requirement in the narrow viewing angle mode, and utilize the difference of incident light processing modes of the light transmitting and reflecting device in different working states to match and independently control the working states of the first light source component and the second light source component of the backlight module respectively, so that the display device can meet the conventional brightness requirement in the wide viewing angle mode, can meet the high brightness requirement in the narrow viewing angle mode, and improve the user experience.
Drawings
Fig. 1 is a sectional view of a backlight module of a general household display device in the prior art.
Fig. 2 is a cross-sectional view of a backlight module of an industrial display device according to the prior art.
FIG. 3a is a schematic cross-sectional view of a display device according to an embodiment of the invention.
FIG. 3b is a schematic cross-sectional view of a backlight module according to an embodiment of the invention.
Fig. 4 is a schematic plan view of a circuit of a first light source driving module according to an embodiment of the present invention.
Fig. 5 is a schematic plan view of a circuit of a second light source driving module according to an embodiment of the invention.
FIG. 6 is a schematic diagram illustrating a path of incident light passing through a light-transmitting and reflecting device when the display device is displaying with a wide viewing angle according to an embodiment of the present invention.
FIG. 7 is a schematic diagram illustrating a path of incident light passing through a light-transmitting and reflecting device when the display device is displaying with a narrow viewing angle according to an embodiment of the present invention.
Fig. 8 is a block diagram of a display device according to an embodiment of the invention.
FIG. 9 is a schematic view of an incident light path of the backlight module and the display panel during wide viewing angle display according to the embodiment of the invention.
FIG. 10 is a schematic view of incident light paths of the backlight module and the display panel during narrow viewing angle mode display according to the embodiment of the invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.
Fig. 3a is a schematic cross-sectional view of a display device according to an embodiment of the present invention, fig. 3b is a schematic cross-sectional view of a backlight module according to an embodiment of the present invention, fig. 4 is a schematic plan view of a circuit of a first light source driving module according to an embodiment of the present invention, fig. 5 is a schematic plan view of a circuit of a second light source driving module according to an embodiment of the present invention, please refer to fig. 3a to fig. 5, the present invention provides a display device, which includes a backlight module 100 and a display panel 200 disposed opposite to the backlight module 100, the backlight module 100 includes a first light source assembly 120, a second light source assembly 130 and a light-transmitting and reflecting device 110, the light-transmitting and reflecting device 110 is sandwiched between the first light source assembly 120 and the second light source assembly 130 and is parallel to the first light source assembly 120 and the second light source.
Referring to fig. 3b and fig. 4, the first light source assembly 120 includes a first light source 121, and a light guide plate 122, a first diffusion sheet 123, a lens 124, and a second diffusion sheet 125, which are sequentially stacked, wherein preferably, the first light source 121 is a side-entry light source design, is disposed on a side surface of the light guide plate 122, and is composed of a row of LEDs uniformly distributed. In other embodiments, the light source of the light guide plate 122 may also be composed of a plurality of mini LEDs arranged in an array.
Referring to fig. 3b and fig. 5, the second light source assembly 130 includes a bottom plate 132 and a second light source 131 disposed on the bottom plate 132, and the second light source assembly 130 is designed as a direct-type light source and is composed of a plurality of Mini LEDs arranged in an array in a plane.
Preferably, in this embodiment, the Mini LEDs used in the direct illumination type light source are disposed on the flexible circuit board, and the number of the Mini LEDs can be as many as 7168, so that when the Mini LEDs are fully turned on, sufficient brightness can be provided. In fact, through testing, the direct type Mini LED light source is fully turned on to make the display device reach the brightness of more than 1500 nits. The side-entering light source is influenced by the limited position of the arranged LED and the like, and is more suitable for being used when the brightness requirement is not large or only the conventional brightness is needed. Thus, the Mini LED is more suitable for providing light source for narrow viewing angle, and the side-in type conventional LED is more suitable for providing light source for wide viewing angle.
Therefore, it is critical to enable the direct-type light source to operate only in the narrow viewing angle mode and the side-type light source to operate only in the wide viewing angle mode, and therefore, the switch control terminal of the first light source assembly 120 and the switch control terminal of the second light source assembly 130 are required to independently control the direct-type light source and the side-type light source, and the transparent reflective device 110 is further required to be matched with the display device.
Referring to fig. 6, the light transmissive and reflective device 110 includes a switching optical film structure 114 and an optical path deflecting structure 111, wherein the switching optical film structure 114 includes a first conductive layer 114a, a liquid crystal molecule 114b, and a second conductive layer 114c, which are sequentially stacked, and preferably, the optical path deflecting structure 111 is a louver film.
Further, the light-transmitting and reflecting device 110 further includes a first polarizer 112 and a second polarizer 118, the first polarizer 112 is sandwiched between the switching optical film structure 114 and the light path deflecting structure 111, and the second polarizer 118 is located between the switching optical film structure 114 and the display panel 200, preferably, the first polarizer 112 is a reflective polarizer, one surface of the first polarizer 112 close to the switching optical film structure 114 is a reflective surface, and one surface of the first polarizer 112 close to the light path deflecting structure 111 is a light-transmitting surface.
Specifically, when the switching optical film structure 114 is in the non-operating state, and the switching optical film structure 114 receives the second voltage, that is, there is no potential difference between the first conductive layer 114a and the second conductive layer 114c, the liquid crystal molecules 114b in the switching optical film structure 114 are in a scattering state, which has a scattering effect on the light, so that the exit angle of the light passing through the liquid crystal molecules 114b is changed to be scattered in each direction, the exit angle of the light is not limited, and the display device realizes wide-viewing angle display.
Fig. 7 is a schematic diagram of a path of incident light passing through a light-transmitting and reflecting device when the display device in the embodiment of the invention is in a narrow viewing angle display, please refer to fig. 7, when the switching optical film structure 114 is in an operating state, the switching optical film structure 114 receives a first voltage, that is, when a potential difference exists between the first conductive layer 114a and the second conductive layer 114c, the function of the switching optical film structure 114 to reflect light is lost, the switching optical film structure 114 is in a transparent state, and the light path deflecting structure 111, that is, the louver film, only allows light of a specific angle to pass through, so that the display device can be controlled to realize the narrow viewing angle display.
Fig. 8 is a schematic block diagram of a display device according to an embodiment of the invention, and please refer to fig. 8, the display device further includes a driving module 300 and a control module 400. The driving module 300 includes a display driving module 301, a first light source driving module 302, a light transmissive and reflective device driving module 303, and a second light source driving module 304.
Further, the control module 400 can receive the power supply and display mode switching control signals at the signal interface 500 to control the second light source driving module 304 where the second light source 131 is located, the light-transmitting and reflecting device driving module 303, and the first light source driving module 302 where the first light source 121 is located, respectively, so as to enable the display device to realize the display with different viewing angles.
Specifically, the first light source driving module 302 may receive the control signal of the control module 400 and convert the control signal into a driving current to control the operating state of the first light source 121. The driving module 303 of the light-transmitting and reflecting device can receive different voltage signals from the control module 400 to control the operation mode of the light-transmitting and reflecting device 110; the second light source driving module 304 can receive the control signal of the control module 400 and convert the control signal into a driving current to control the working state of the second light source 131; the display driving module 301 may receive signal data at the signal interface 500 and convert the signal data into a driving signal and a voltage to control the operating state of the display panel 200.
In this embodiment, when the display device is displaying with a wide viewing angle, the first light source driving module 302 controls the first light source 121 to be in an operating state, the light transmissive and reflective device driving module 303 controls the light transmissive and reflective device 110 to be in a non-operating state, and the second light source driving module 304 controls the second light source 131 to be in a non-operating state.
Fig. 9 is a schematic view of an incident light path of the backlight module and the display panel during wide viewing angle display according to an embodiment of the invention, please refer to fig. 9, at this time, only the side-in light source is operated, the direct light source is not operated, there is no potential difference between the first conductive layer 114a and the second conductive layer 114c in the switching optical film structure 114, the light-transmitting and reflecting device 110 only plays a role of reflecting just like a mirror, the side-in light source, i.e., the incident light emitted by the first light source 121, is incident toward the light-transmitting and reflecting device 110 under the action of the light guide plate 122, and the light is reflected by the first polarizer 112 and then reflected toward the display panel 200, so as to provide a light. It can be seen that when the user uses the wide viewing angle display, the light source with the regular brightness is provided by the side-in light source of the display device, which can meet the user's requirement for the regular brightness when the wide viewing angle display is used.
When the display device displays with a narrow viewing angle, the light transmissive/reflective device driving module 303 controls the light transmissive/reflective device 110 to be in an operating state, the second light source driving module 304 controls the second light source 131 to be in an operating state, and the first light source driving module 302 controls the first light source 121 to be in a non-operating state.
Fig. 10 is a schematic view of an incident light path of the backlight module and the display panel during narrow viewing angle mode display according to an embodiment of the present invention, please refer to fig. 10, at this time, only the direct light source is operated, the side-entry light source is not operated, but the light transmitting and reflecting device 110 is operated, that is, there is a potential difference between the first conductive layer 114a and the second conductive layer 114c in the switching optical film structure 114, at this time, the light transmitting and reflecting device 110 is in a transparent structure, and light provided by the direct light source, that is, the second light source 131 enters the light path deflecting structure 111, and after adjusting and controlling an incident light angle thereof by the light path deflecting structure 111, the light passes through the transparent and reflecting device 110, and finally enters the display panel 200 to provide a light source for the display panel, so that when a user uses narrow viewing angle display, the direct light source provides light with a luminance as.
Therefore, when the user selects narrow viewing angle display, the control module 400 controls the light-transmitting and reflecting device driving module 303 and the second light source driving module 304 to operate, so that the display device can operate under the narrow viewing angle, and the second light source 131 can provide higher brightness of 1500 nits.
When the user selects the wide viewing angle display, the control module 400 controls the first light source driving module 302 to operate, so that the display device operates under the wide viewing angle, and the first light source 121 can provide the conventional brightness of, for example, 500nits, only, so that the display device can achieve low power consumption when displaying under the wide viewing angle.
In summary, the display device and the control method thereof provided by the invention solve the problem that the display device in the prior art cannot simultaneously satisfy the conventional brightness requirement in the wide viewing angle mode and the higher brightness requirement in the narrow viewing angle mode, and utilize the difference of the incident light processing modes of the light transmitting and reflecting device 110 in different working states to cooperate with the independent control of the working states of the side-in light source and the direct-type light source of the backlight module 100, so that the display device can satisfy the conventional brightness requirement in the wide viewing angle mode and the high brightness requirement in the narrow viewing angle mode, thereby improving the user experience.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A display device comprises a backlight module (100) and a display panel (200) arranged opposite to the backlight module (100), and is characterized in that the backlight module (100) comprises a first light source component (120), a second light source component (130) and a light transmitting and reflecting device (110), the light transmitting and reflecting device (110) is clamped between the first light source component (120) and the second light source component (130), and the first light source component (120) is arranged on one side of the backlight module (100) close to the display device (200);
the light transmitting and reflecting device (110) comprises a switching type optical film layer structure (114) and an optical path deflecting structure (111), wherein the switching type optical film layer structure (114) has a transparent mode which receives a first voltage and does not scatter light and has a scattering mode which receives a second voltage and scatters light;
when the display device realizes wide-viewing-angle display, the switching type optical film layer structure (114) is in a scattering mode, and light rays emitted by the first light source component (120) are reflected into the display panel (200) by the switching type optical film layer structure (114);
when the display device realizes narrow-view angle display, the switching type optical film layer structure (114) is in a transparent mode, and light rays emitted by the second light source assembly (130) pass through the switching type optical film layer structure (114) after being deflected in the light path deflection structure (111) and enter the display panel (200).
2. The display device according to claim 1, wherein the first light source assembly (120) includes a first light source (121), and a light guide plate (122), a first diffusion sheet (123), a lens (124), and a second diffusion sheet (125) which are sequentially stacked, the first light source (121) being disposed at a side of the light guide plate (122).
3. The display device according to claim 2, wherein the second light source assembly (130) comprises a base plate (132) and a second light source (131) disposed on the base plate (132).
4. The display device according to claim 3, wherein the second light source (131) comprises a plurality of mini LEDs arranged in an array.
5. The display device according to claim 1, wherein the light transmissive and reflective device (110) further comprises a first polarizer (112) and a second polarizer (118), the first polarizer (112) being sandwiched between the switching optical film structure (114) and the optical path deflecting structure (111), the second polarizer (118) being sandwiched between the switching optical film structure (114) and the display panel (200).
6. The display device according to claim 5, wherein the first polarizer (112) is a reflective polarizer, a surface of the first polarizer (112) adjacent to the switching optical film structure (114) is a reflective surface, and a surface of the first polarizer (112) adjacent to the optical path deflecting structure (111) is a light transmissive surface.
7. The display device according to claim 1, wherein the optical path deflecting structure (111) is a louver film.
8. The display device according to claim 3, further comprising a driving module (300) and a control module (400); the driving module (300) comprises a display driving module (301), a first light source driving module (302), a light-transmitting reflecting device driving module (303) and a second light source driving module (304); the first light source driving module (302), the light-transmitting and reflecting device driving module (303), and the second light source driving module (304) can receive the control signal of the control module (400) and respectively control the working states of the first light source (121), the light-transmitting and reflecting device (110), and the second light source (131) correspondingly.
9. A control method of a display device according to any one of claims 1 to 8, comprising:
the control driving module (300) receives a control signal of the control module (400);
when the first light source driving module (302) controls the first light source (121) to be in a working state, the light transmitting and reflecting device driving module (303) controls the light transmitting and reflecting device (110) to be in a non-working state, and the second light source driving module (304) controls the second light source (131) to be in a non-working state, the display device realizes wide-view-angle display;
when the light transmission and reflection device driving module (303) controls the light transmission and reflection device (110) to be in a working state, the second light source driving module (304) controls the second light source (131) to be in a working state, and the first light source driving module (302) controls the first light source (121) to be in a non-working state, the display device realizes narrow viewing angle display.
10. The method of claim 9, wherein the switchable optical film structure (114) is in a transparent mode receiving a first voltage without scattering light when the transflective device driving module (303) is in an active state, and wherein the switchable optical film structure (114) is in a scattering mode receiving a second voltage to scatter light when the transflective device driving module (303) is in an inactive state.
CN202010947033.2A 2020-09-10 2020-09-10 Display device and control method thereof Pending CN112068354A (en)

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Application publication date: 20201211