CN111025761A - Light source device and electronic system - Google Patents

Light source device and electronic system Download PDF

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Publication number
CN111025761A
CN111025761A CN201911403383.6A CN201911403383A CN111025761A CN 111025761 A CN111025761 A CN 111025761A CN 201911403383 A CN201911403383 A CN 201911403383A CN 111025761 A CN111025761 A CN 111025761A
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China
Prior art keywords
light
adjusting
light source
assembly
electronic system
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Granted
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CN201911403383.6A
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Chinese (zh)
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CN111025761B (en
Inventor
苏跃峰
陈英标
宋扬
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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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
    • 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
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • 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
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/13363—Birefringent elements, e.g. for optical compensation
    • 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or 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
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13476—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which at least one liquid crystal cell or layer assumes a scattering state
    • 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
    • G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses

Abstract

The application discloses light source equipment and electronic system sets up light source equipment and has light source subassembly, adjusting part and leaded light subassembly, the light source subassembly is used for the first light set of outgoing, adjusting part is used for forming the second light set, adjusting part can adjust the formation in the second light set the proportion of first light set, leaded light subassembly is used for inciting the second light set forms the third light set, wherein, the input light set that display device can be regarded as to the third light set for image display. In the technical scheme, the proportion of the first light set in the second light set can be adjusted and formed by the adjusting component, so that the brightness of the third light set emitted by the light source device is adjusted, the brightness of the light source component is not required to be adjusted, and the adjustment of the input light set of the display device can be realized to adjust the display brightness.

Description

Light source device and electronic system
Technical Field
The present application relates to the field of display device technologies, and more particularly, to a light source device and an electronic system.
Background
With the continuous development of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present.
The main component of the electronic device for realizing the display function is a display, and in the existing electronic device, if the display brightness needs to be adjusted, the backlight brightness is mainly adjusted by adjusting the luminous brightness of a light source component in the light source device, so that the display brightness of the display of the electronic device is adjusted.
Content of application
In view of this, the present application provides a light source device and an electronic system, and the scheme is as follows:
a light source apparatus comprising:
the light source component is used for emitting a first light ray set;
the adjusting component is positioned in the irradiation range of the first light set and used for forming a second light set, wherein the adjusting component can adjust the proportion of the first light set in the second light set;
and the light guide assembly is positioned in the irradiation range of the second light ray set and used for forming a third light ray set by the incident second light ray set, wherein the third light ray set can be used as an input light ray set of the display equipment.
Preferably, in the above light source device, the light guide member includes: the first side face of the light guide plate is opposite to the light source component, and the adjusting component is positioned between the first side face and the light source component; the third set of light rays exits from a second side of the light guide plate, wherein the first side and the second side are adjacent sides; and a reflective member disposed at a third side of the light guide plate, wherein the third side and the second side are opposite sides;
or, the light guide assembly includes: the light guide plate is used for emitting the third light ray set from the second side face of the light guide plate; a reflection assembly disposed at a third side of the light guide plate, wherein the second side and the third side are opposite sides; the light source assembly is arranged between the reflecting assembly and the third side face of the light guide plate, and the adjusting assembly is positioned between the light source assembly and the third side face of the light guide plate.
Preferably, in the above light source device, the adjusting component is configured to adjust the propagation direction of the first light ray set, so that the number of the second light ray sets incident to the light guide component is changed, and/or so that the incidence angle of the second light ray sets incident to the light guide component is changed.
Preferably, in the above light source apparatus, the adjustment assembly includes:
the first transparent electrode and the transparent electrode are oppositely arranged;
a functional layer located between the first transparent electrode and the second transparent electrode;
the first transparent electrode and the second transparent electrode are used for adjusting the functional layer to be in different states based on control voltage, so that the propagation directions of light rays incident into the functional layer are different;
the functional layer is a polymer dispersed liquid crystal layer, and the control voltage is used for adjusting the haze of the polymer dispersed liquid crystal layer so as to control the scattering parameter of the adjusting component;
or, the functional layer is a birefringence material layer, the control voltage is used for adjusting the state switching of the birefringence material layer between a first refractive index and a second refractive index, and the first refractive index is different from the second refractive index.
Preferably, in the above light source device, the adjusting component is configured to adjust the transmittance of the first light ray set, so that the number of the second light ray sets incident to the light guide component is changed;
the adjustment assembly includes:
the through hole array is provided with a plurality of through holes with adjustable conduction states, and the quantity of the second light ray set entering the light guide assembly through the adjusting assembly is adjusted by adjusting the conduction quantity of the through holes;
or, two oppositely arranged gratings, wherein one grating can relatively move relative to the other grating under the control of a control voltage, so as to adjust the number of the second light ray sets entering the light guide assembly through the adjusting assembly under different relative positions.
The present invention also provides an electronic system comprising:
a light source device: the device comprises a light source component, an adjusting component and a light guide component; the light source component is used for emitting a first light ray set; the adjusting assembly is positioned in the irradiation range of the first light set and used for forming a second light set, and the adjusting assembly can adjust the proportion of the first light set in the second light set; the light guide assembly is positioned in an irradiation range of the second light ray set and used for forming a third light ray set by the incident second light ray set, wherein the third light ray set can be used as an input light ray set of the display device;
a display device: the display state is switched according to the image data, so that the third light ray set forms a fourth light ray set;
the control device is at least used for adjusting the proportion through the adjusting component so as to adjust the display brightness of the electronic system.
Preferably, in the electronic system, after the control device obtains the brightness adjustment instruction, it selects one of at least two control modes to adjust the display brightness of the electronic system;
the at least two regulation modes comprise:
adjusting the proportion through the adjusting component to adjust the display brightness of the electronic system;
and adjusting the brightness of the light source assembly to adjust the display brightness of the electronic system.
Preferably, in the electronic system, the method for adjusting the display brightness of the electronic system by the control device includes:
if the required display brightness is not less than the set threshold value, adjusting the display brightness of the electronic system by adjusting the brightness of the light source assembly;
and if the required display brightness is smaller than the set threshold value, the proportion is adjusted through the adjusting component so as to adjust the display brightness of the electronic system.
Preferably, in the electronic system, the method for adjusting the brightness of the electronic system by the control device includes:
if the required display brightness is not less than the set threshold value, adjusting the display brightness of the electronic system by adjusting the brightness of the light source assembly;
and if the required display brightness is smaller than the set threshold, based on the acquired adjusting instruction, selecting to adjust the display brightness of the electronic system by adjusting the brightness of the light source assembly or selecting to adjust the proportion by the adjusting assembly to adjust the display brightness of the electronic system.
Preferably, in the electronic system, the electronic system further includes a power supply device configured to provide power required for operation for the electronic system, and the control device is configured to obtain the adjustment instruction based on a power supply state of the power supply device;
or, the electronic system further includes a detection device for detecting the brightness of the ambient light, and the control device is configured to obtain the adjustment instruction based on a result of detection of the ambient light by the detection device.
It can be known from the above description that in the light source device and the electronic system provided in the technical solution of the present application, the light source device is provided with a light source assembly, an adjusting assembly and a light guide assembly, the light source assembly is used for emitting a first light set, the adjusting assembly is located within an irradiation range of the first light set and is used for forming a second light set, the adjusting assembly can adjust a proportion of the first light set in the second light set, the light guide assembly is located within an irradiation range of the second light set and is used for forming a third light set with the incident second light set, wherein the third light set can be used as an input light set of the display device and is used for displaying images.
In the technical scheme, the proportion of the first light set in the second light set can be adjusted and formed by the adjusting component, so that the brightness of the third light set emitted by the light source device is adjusted, the brightness of the light source component is not required to be adjusted, and the adjustment of the input light set of the display device can be realized to adjust the display brightness.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structures, proportions, and dimensions shown in the drawings and described in the specification are for illustrative purposes only and are not intended to limit the scope of the present disclosure, which is defined by the claims, but rather by the claims, it is understood that these drawings and their equivalents are merely illustrative and not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic structural diagram of a light source apparatus according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of another light source apparatus provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of another light source apparatus provided in the embodiment of the present application;
FIG. 4 is a schematic structural diagram of an adjustment assembly provided in an embodiment of the present application;
FIG. 5 is a schematic structural diagram of an adjustment assembly provided in an embodiment of the present application;
FIG. 6 is a schematic structural diagram of another adjustment assembly provided in an embodiment of the present application;
fig. 7 is a schematic structural diagram of an electronic system according to an embodiment of the present application;
FIG. 8 is a schematic diagram of an electronic system according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of another electronic system according to an embodiment of the present application;
FIG. 10 is a color gamut diagram of the emitted light of the LED light source device at different driving currents;
fig. 11 is an electron microscope view of PDLC at different control voltages.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Taking an electronic device using a liquid crystal display as an example, the liquid crystal display includes a backlight module and a liquid crystal module which are oppositely arranged, and the backlight module includes a light source device for providing backlight for the liquid crystal module. And the liquid crystal module performs image display based on the backlight.
In the conventional technology, the scheme of adjusting the brightness of the liquid crystal display is to adjust the final display brightness by adjusting the brightness of the light source device. The following two ways to adjust the brightness of the light source device are mainly as follows:
one way is to drive the light source devices to emit light by PWM (pulse width modulation) signals, and PWM signals of different duty ratios make the light source devices emit light at different brightness levels. Based on this, the brightness of the light source device can be adjusted by adjusting the PWM signal, and thus the final display brightness can be adjusted. In this method, the light source device actually performs on-off switching of high frequencies, and performs light emission display by using the principle of visual retention, which may cause visual fatigue of a user.
Alternatively, the brightness of the LED light source device (inorganic light emitting diode) in the light source apparatus is related to the driving current, and within a certain range, the larger the current, the larger the backlight brightness, and conversely, the smaller the brightness. However, the LED light source device generally excites the yellow phosphor to emit the white backlight or excites the red phosphor to emit the white backlight through the blue LED chip, so that the liquid crystal module performs color display based on the white backlight. However, the excitation of the phosphor by the LED light source device needs to be performed at a specific driving current, and if the current does not meet the requirement of the operating current, the emitted white light has color shift, as shown in fig. 10, fig. 10 is a color gamut diagram of the emitted light of the LED light source device at different driving currents, as can be seen from fig. 10, when the driving currents are 50mA, 15mA, 10mA, 5mA and 1mA, the color gamut coordinate of the emitted light changes greatly, which may affect the image display quality.
In view of this, the present disclosure provides a light source apparatus, which has a light source assembly, an adjusting assembly and a light guide assembly, wherein the light source assembly is configured to emit a first set of light rays, the adjusting assembly is configured to form a second set of light rays, the adjusting assembly is capable of adjusting a proportion of the first set of light rays forming the second set of light rays, and the light guide assembly is configured to form a third set of light rays from the incident second set of light rays, and the third set of light rays can be used as an input set of light rays for a display apparatus to display an image. The proportion of the first light ray set in the second light ray set can be adjusted and formed through the adjusting component, so that the brightness of the third light ray set emitted by the light source device is adjusted, the brightness of the light source device does not need to be adjusted, and the input light ray set of the display device can be adjusted to adjust the display brightness.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a light source apparatus provided in an embodiment of the present application, where the light source apparatus includes: light source assembly 11, adjusting assembly 12 and light guide assembly 13. The light source assembly 11 is configured to emit a first set of light rays 1. The adjusting component 12 is located within the irradiation range of the first light set 1 and is used for forming a second light set 2, wherein the adjusting component 12 can adjust the proportion of the first light set 1 in the second light set 2. The light guide assembly 13 is located within an illumination range of the second light set 2, and is configured to form a third light set 3 from the incident second light set 2, where the third light set 3 can be used as an input light set of the display device 14.
It can be seen that the light source device shown in fig. 1 can adjust the proportion of the first light set 1 in the second light set 2 through the adjusting component 12, and can adjust the third light set incident to the display device 14 by the light source device without changing the light emitting state of the light source component 11, that is, the brightness of the light incident to the display device 14 by the light source device can be adjusted without changing the light emitting brightness of the light source component 11, so as to meet the requirement of adjusting the image display brightness. The brightness of the light source assembly does not need to be adjusted through a PWM signal, the visual fatigue problem caused by the brightness is avoided, the brightness of the driving current of the light source assembly 11 does not need to be changed, and the display color cast problem caused by the brightness is avoided.
In one embodiment, the structure of the light guide assembly 13 can be as shown in fig. 2.
As shown in fig. 2, fig. 2 is a schematic structural diagram of another light source device provided in the embodiment of the present application, in this way, the light guide assembly 13 includes: a light guide plate 131, a first side C1 of the light guide plate 131 being disposed opposite to the light source assembly 11, and the adjusting assembly 12 being located between the first side C1 and the light source assembly 11; the third set of light rays 3 exits from the second side C2 of the light guide plate, wherein the first side C1 and the second side C2 are adjacent sides; and a reflection member 132 disposed at a third side C3 of the light guide plate 131, wherein the third side and the second side are opposite sides.
In the mode shown in fig. 2, the light source device is a side-in backlight module, the light source assembly 11 includes light source groups, each light source group includes a plurality of LED light source devices arranged in sequence, and in the same light source group, the arrangement directions of the plurality of LED light source devices are parallel to the first side surface C1 and the second side surface C2. The first light set 1 emitted from the light source assembly 11 forms a second light set 2 through the adjusting assembly 12. The second light set 2 is incident into the light guide plate 131 through the first side surface C1, and the second light set 2 incident into the light guide plate 131 can be directly emitted through the second side surface C2, or emitted through the second side surface C2 after being internally reflected by the light guide plate 131, or emitted through the third side surface C3, reflected back to the light guide plate 131 through the reflection assembly 132, and then emitted through the second side surface C2, so as to form the third light set 3. Wherein the second side C2 and the third side C3 are opposite sides of the light guide plate 131.
In another embodiment, the structure of the light guide assembly 13 can be as shown in fig. 3.
As shown in fig. 3, fig. 3 is a schematic structural diagram of another light source device provided in an embodiment of the present application, in this manner, the light guide assembly 13 includes: the light guide plate 131, from the second side C2 of which the third light set 3 exits; a reflection assembly 132 disposed at a third side C3 of the light guide plate 131, wherein the second side C2 and the third side C3 are opposite sides; the light source assembly 11 is disposed between the reflection assembly 132 and the third side C3 of the light guide plate 131, and the adjustment assembly is disposed between the light source assembly and the third side of the light guide plate.
In the mode shown in fig. 3, the light source device is a bottom-in type backlight module, and the light source assembly 11 is an area array light source and includes a plurality of LED light source devices arranged in an array. The first light set 1 emitted from the light source assembly 11 forms a second light set 2 through the adjusting assembly 12. The second light set 2 is incident into the light guide plate 131 through the third side surface C3, and the second light set 2 incident into the light guide plate 131 can be directly emitted through the second side surface C2, or emitted through the second side surface C2 after being internally reflected by the light guide plate 131, or emitted through the third side surface C3, reflected back to the light guide plate 131 through the reflection assembly 132, and then emitted through the second side surface C2, so as to form the third light set 3.
The embodiment of the application can adjust the proportion of the first light set 1 in the second light set 2 through the adjusting component 12, the proportion is large, the quantity of the second light set 2 in the incident light guide component 13 is large, the quantity of the third light set 3 emitted by the light guide component 13 is large, and the luminance of the light source device finally input into the display device 14 is large, otherwise, if the proportion is small, the quantity of the second light set 2 in the incident light guide component 13 is small, the quantity of the third light set 3 emitted by the light guide component 13 is small, and the luminance of the light source device finally input into the display device 13 is small.
Based on the above brightness adjustment principle, the adjusting component 12 can adjust the ratio in the following three ways:
first, the adjusting component 12 is used to adjust the propagation direction of the first light ray set 1, so that the number of the second light ray sets 2 incident to the light guide component 13 is changed. Since the number of the second light ray sets 2 entering the light guide assembly 13 is changed, the number of the third light ray sets 3 finally exiting the light guide assembly is changed, and therefore the output light brightness of the light source device is adjusted.
Secondly, the adjusting component 12 is used to change the incident angle of the second set of light rays 2 incident to the light guide component 13. Due to the change of the incident angle of the second light set 2 entering the light guide assembly 13, the light which can be irradiated to the display device 14 through the light guide assembly 13 before the incident angle is changed becomes incapable of being irradiated to the display device 14, or the light which can not be irradiated to the display device 14 through the light guide assembly 13 before the incident angle is changed becomes capable of being irradiated to the display device 14, so that the output light brightness of the light source device is adjusted.
In a third way, the adjusting component 12 is configured to adjust the propagation direction of the first light ray set 1, so that the number of the second light ray sets 2 incident to the light guide component 13 is changed, and further configured to change the incident angle of the second light ray sets 2 incident to the light guide component 13. This mode has two adjusting effects, mode one and mode two, to realize the regulation of the luminance of the light source device output to the display device 14.
In the embodiment of the present application, the structure of the adjusting assembly 12 can be as shown in fig. 4.
As shown in fig. 4, fig. 4 is a schematic structural diagram of an adjusting assembly according to an embodiment of the present application, and the adjusting assembly 12 shown in fig. 4 includes: a first transparent electrode 21 and a transparent electrode 22 which are arranged to face each other; a functional layer 23 located between the first transparent electrode 21 and the second transparent electrode 22. Optionally, the adjusting assembly 12 includes a first transparent substrate 24 and a second transparent substrate 25, which are oppositely disposed, the first transparent electrode 21 is fabricated on a surface of the first transparent substrate 24, and the second transparent electrode 22 is fabricated on a surface of the second transparent substrate 25.
The first transparent electrode 21 and the second transparent electrode 23 are configured to adjust the functional layer 23 to be in different states based on the control voltage, so that propagation directions of light rays entering the functional layer 23 are different, and parameters of the second light ray set 2 emitted from the functional layer 23 are changed, including changing an emission direction or an emission number of the second light ray set 2, so that the number of the second light ray sets 2 which can be finally emitted to the light guide assembly 13 is changed.
In one mode, the functional layer 23 is a polymer dispersed liquid crystal layer (PDLC), and the control voltage is used to adjust a haze of the PDLC layer to control a scattering parameter of the adjustment component. Under different control voltages, the haze of the polymer dispersed liquid crystal layer changes, and the scattering parameters of the light set incident into the polymer dispersed liquid crystal layer are different, so that the scattering path of the light set incident into the adjusting component 12 changes, the emergent path of the second light set 2 emitted by the adjusting component 12 changes, the change of the number of the second light sets 2 incident into the light guide component 13 is realized, the brightness of the third light set 3 emitted by the light guide component 13 can be changed, and the regulation of the brightness of the emergent light of the light source equipment is realized.
The effect of the PDLC haze varying with the control voltage is shown in fig. 11, fig. 11 is an electron microscope view of the PDLC under different control voltages, fig. 11 shows the electron microscope view of the PDLC corresponding to the PDLC under the control voltages of 0V, 3V, 6V, 9V, 12V and 15V, and it can be seen from fig. 11 that the smaller the voltage, the brighter the electron microscope view, which shows that the higher the atomization degree, and as the voltage increases, the more ordered the liquid crystal molecules in the PDLC are, the darker the electron microscope view, the smaller the atomization degree. The greater the degree of fogging, the poorer the light transmission performance of the PDLC. Therefore, the light-emitting brightness of the PDLC can be adjusted by adjusting the control voltage.
In another mode, the functional layer 23 is a birefringence material layer, and the control voltage is used to adjust the state switching of the birefringence material layer between a first refractive index and a second refractive index, where the first refractive index is different from the second refractive index. Under different control voltages, the refractive index of the birefringent material layer changes in a reflecting manner, and the refraction paths of the light sets incident into the birefringent material layer are different, so that the refraction paths of the light sets incident into the adjusting component 12 can be changed, the emergent paths of the second light sets 2 emitted by the adjusting component 12 can be changed, the change of the number of the second light sets 2 incident into the light guide component 13 is realized, the brightness of the third light sets 3 emitted by the light guide component 13 can be changed, and the brightness of the emergent light of the light source equipment is adjusted.
In the first, second, and third manners, under the condition that the number of the first light sets 1 incident to the adjusting assembly 12 from the light source assembly 11 is fixed, the number of the second light sets 2 emitted from the adjusting assembly 12 is equal to the number of the incident first light sets 1, and the number of the third light sets 3 emitted from the light guide assembly 13 is adjusted by changing the number and/or the incident angle of the second light sets 12 incident to the light guide assembly 13.
In other ways, the adjustment of the number of the third light sets 3 emitted from the light guide component 13 may also be implemented by changing the number of the second light sets 2 emitted from the adjustment component 12, for example, the adjustment component 12 may be configured to adjust the transmittance of the first light set 1, so that the number of the second light sets incident to the light guide component 13 is changed. In this manner, under the condition that the number of the first light sets 1 incident on the adjusting assembly 12 from the light source assembly 11 is fixed, the number of the second light sets 2 emitted from the adjusting assembly 12 is changed in accordance with the number of the incident first light sets 1, that is, the number of the first light sets 1 penetrating through the adjusting assembly 12 can be adjusted.
Given the number of the first light sets 1 incident on the adjusting assembly 12 from the light source assembly 11, if the number of the second light sets 2 emitted from the adjusting assembly 12 is changed to be equal to the number of the incident first light sets 1, the structure of the adjusting assembly 12 may be as shown in fig. 5 and 6.
As shown in fig. 5, fig. 5 is a schematic structural diagram of an adjusting assembly according to an embodiment of the present application, and the adjusting assembly 12 shown in fig. 5 includes: and the through hole array is provided with a plurality of through holes 31 with adjustable conduction states, and the quantity of the second light ray set 2 entering the light guide assembly 13 through the adjusting assembly 12 is adjusted by adjusting the conduction quantity of the through holes 31.
In the manner shown in fig. 5, a plurality of through holes 31 are formed on a light-tight substrate 32, and a switch element (the switch element is not shown in fig. 5) capable of being controlled to open and close is disposed on the through holes 31 by a micro-electromechanical technology, and each switch element can be controlled individually to block the through hole 31 or expose the through hole 31, so as to change the quantity of the second light set 2 emitted by the adjusting assembly 12.
As shown in fig. 6, fig. 6 is a schematic structural diagram of another adjusting assembly provided in the embodiment of the present application, and the adjusting assembly 12 shown in fig. 6 includes: two oppositely arranged gratings 42, 43, wherein one grating 42 is relatively movable with respect to the other grating 43 under control of a control voltage to adjust the amount of the second set of light rays 2 entering the light guiding assembly 13 through the adjusting assembly 12 at different relative positions.
In the manner shown in fig. 6, each of the gratings 42 and 43 has a transparent grid 44 and an opaque grid 45, when the two transparent grids 33 are overlapped to the maximum extent, the number of the second light sets 2 emitted therefrom is the maximum, when the opaque grid 45 of the grating 42 is overlapped to the maximum extent of the transparent grid 44 of the grating 43, the number of the second light sets 2 emitted therefrom is the minimum, and by adjusting the relative positions of the gratings 42 and 43 to be different, the number of the second light sets 2 emitted finally is also different, thereby changing the number of the second light sets 2 emitted from the adjusting component 12.
As can be seen from the above description, the light source device provided in the embodiment of the present application can realize the adjustment of the final emergent light brightness of the light source device by setting the adjusting component 12 without changing the state of the first light set 1 emitted from the light source component 11.
In other ways, the light source device may be provided with a control device respectively connected to the light source assembly 11 and the adjusting assembly 12, so as to adjust parameters of the light ray set emitted from the light source assembly 11 and/or the adjusting assembly 12 based on the requirement, so as to adjust the brightness of the final emitted light ray set of the light source device.
Based on the foregoing embodiments, another embodiment of the present application further provides an electronic system, where the electronic system is shown in fig. 7, and fig. 7 is a schematic structural diagram of the electronic system provided in the embodiment of the present application, where the electronic system includes: a light source device 10, a display device 14 and a control device 15. The light source device 10 and the display device 14 are electrically connected to the control device 15, respectively.
The light source apparatus 10 has a light source assembly, an adjustment assembly, and a light guide assembly; the light source component is used for emitting a first light ray set; the adjusting assembly is positioned in the irradiation range of the first light set and used for forming a second light set, and the adjusting assembly can adjust the proportion of the first light set in the second light set; the light guide assembly is positioned in an irradiation range of the second light ray set and used for forming a third light ray set by the incident second light ray set, wherein the third light ray set can be used as an input light ray set of the display device; . The implementation manner of the light source device 10 may be any one of the manners described in the above embodiments, and the structure thereof may refer to the above embodiments, which is not described herein again.
The display device 14 is configured to switch a display state according to image data, so that the third light set forms a fourth light set; the display device 14 may be a liquid crystal display module. The third light output by the light source device 10 is a backlight source required by the display device 14 to display.
The control device 15 is at least used for adjusting the proportion through the adjusting component so as to adjust the display brightness of the electronic system.
After the control device 15 obtains the brightness adjustment instruction, selecting one of at least two control modes to adjust the display brightness of the electronic system; the at least two regulation modes comprise: adjusting the proportion through the adjusting component to adjust the display brightness of the electronic system; and adjusting the brightness of the light source assembly to adjust the display brightness of the electronic system. In the prior art, the electronic device can only adjust the display brightness by adjusting the brightness of the light source assembly. In the embodiment of the application, the electronic system can select a required mode based on an adjusting instruction, and adjust the final display brightness by adjusting the brightness of the light source assembly and/or the adjusting assembly emergent light set.
In the electronic system, the method for adjusting the display brightness of the electronic system by the control device 15 includes: if the required display brightness is not less than the set threshold value, adjusting the display brightness of the electronic system by adjusting the brightness of the light source assembly; and if the required display brightness is smaller than the set threshold value, the proportion is adjusted through the adjusting component so as to adjust the display brightness of the electronic system.
The inventor researches and discovers that the visual fatigue problem caused by adjusting the brightness of the light source component by adjusting the duty ratio of the PWM signal mainly occurs in the condition that the display brightness is less than the first limit value, by adjusting the brightness of the light source assembly by adjusting the driving current, the color shift problem mainly occurs when the display brightness is less than the second limit value, it is possible to set the set threshold value to be not less than the first limit value and the second limit value, if so, when the required display brightness is not less than the set threshold value, the display brightness of the electronic system can be adjusted by adjusting the brightness of the light source component, and if the required display brightness is smaller than the set threshold value, the proportion is adjusted through the adjusting component to adjust the display brightness of the electronic system, the visual fatigue problem and the color cast problem existing in the existing display brightness adjusting scheme can be effectively avoided.
In other ways, the method for adjusting the display brightness by the control device 15 may further include: if the required display brightness is not less than the set threshold value, adjusting the display brightness of the electronic system by adjusting the brightness of the light source assembly; and if the required display brightness is smaller than the set threshold, based on the acquired adjusting instruction, selecting to adjust the display brightness of the electronic system by adjusting the brightness of the light source assembly or selecting to adjust the proportion by the adjusting assembly to adjust the display brightness of the electronic system. In this way, when the required display brightness is smaller than the set threshold, the adjustment mode can be selected based on the adjustment instruction to adjust the display brightness, and the adjustment is not limited to only adjusting the display brightness by the adjustment component to adjust the ratio.
As shown in fig. 8, fig. 8 is a schematic structural diagram of another electronic system according to an embodiment of the present application, where the electronic system shown in fig. 8 further includes, based on the manner shown in fig. 7: the power supply device 16 is configured to provide power required by the electronic system for operation, and the control device 15 is configured to obtain the adjustment instruction based on a power supply state of the power supply device.
Specifically, if the power supply of the power supply device 16 is sufficient and can satisfy that the light source assembly emits light for a set time under the rated working voltage, if the required display brightness is not less than the set threshold, the display brightness of the electronic system is adjusted by adjusting the brightness of the light source assembly; if the required display brightness is smaller than the set threshold, the control device 15 obtains a first adjusting instruction, and selects to adjust the ratio through the adjusting component based on the first adjusting instruction so as to adjust the display brightness of the electronic system. Thus, the visual fatigue problem and the color cast problem existing in the existing brightness adjusting scheme can be avoided. If the electronic system is a notebook computer, the mode is suitable for connecting the power supply equipment 16 of the notebook computer with a power grid, and the scheme that the display brightness of the light source component is adjusted by the adjusting component under the condition of sufficient power supply can be ensured.
If the power supply amount of the power supply device 16 is insufficient and cannot meet the requirement that the light source assembly emits light for a set time under the rated working voltage, if the required display brightness is not less than a set threshold value, the display brightness of the electronic system is adjusted by adjusting the brightness of the light source assembly; if the required display brightness is smaller than the set threshold, the control device 15 obtains a second adjustment instruction, and selects to adjust the display brightness of the electronic system by adjusting the brightness of the light source assembly based on the second adjustment instruction. Therefore, although the visual fatigue problem and the color cast problem exist, the high-brightness work of the light source component under the rated voltage is not required to be kept, and the electric power is saved so as to ensure the endurance of an electronic system. If the electronic system is a notebook computer, the mode is suitable for disconnecting the power supply equipment 16 of the notebook computer from the power grid, and when the power supply equipment is powered by a battery of the electronic system, the display brightness can be adjusted on the premise of ensuring the endurance time.
As shown in fig. 9, fig. 9 is a schematic structural diagram of another electronic system provided in the embodiment of the present application, and the electronic system shown in fig. 9 further includes, based on the manner shown in fig. 7: a detection device 17 for detecting the brightness of the ambient light, and the control device is configured to acquire the adjustment instruction based on the detection result of the ambient light by the detection device 17. The control device obtains a third instruction, selects to adjust the ratio through the adjusting component to adjust the display brightness of the electronic system based on the third instruction, and obtains a fourth instruction to adjust the display brightness of the electronic system based on the fourth instruction, wherein the adjusting component adjusts the brightness of the light source component based on the fourth instruction.
The adjustment instruction may be automatically generated based on the power supply state of the power supply device 16 or the detection result of the detection device 17 to implement automatic selection of the adjustment mode, or may be input based on a manual input operation of a user to implement manual selection of the adjustment mode in other manners.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the electronic system disclosed in the embodiment, since it corresponds to the light source device disclosed in the embodiment, the description is relatively simple, and the relevant points can be referred to the description of the relevant parts of the light source device.
It is further noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A light source apparatus comprising:
the light source component is used for emitting a first light ray set;
the adjusting component is positioned in the irradiation range of the first light set and used for forming a second light set, wherein the adjusting component can adjust the proportion of the first light set in the second light set;
and the light guide assembly is positioned in the irradiation range of the second light ray set and used for forming a third light ray set by the incident second light ray set, wherein the third light ray set can be used as an input light ray set of the display equipment.
2. The light source apparatus of claim 1, the light guide assembly comprising: the first side face of the light guide plate is opposite to the light source component, and the adjusting component is positioned between the first side face and the light source component; the third set of light rays exits from a second side of the light guide plate, wherein the first side and the second side are adjacent sides; and a reflective member disposed at a third side of the light guide plate, wherein the third side and the second side are opposite sides;
or, the light guide assembly includes: the light guide plate is used for emitting the third light ray set from the second side face of the light guide plate; a reflection assembly disposed at a third side of the light guide plate, wherein the second side and the third side are opposite sides; the light source assembly is arranged between the reflecting assembly and the third side face of the light guide plate, and the adjusting assembly is positioned between the light source assembly and the third side face of the light guide plate.
3. The light source apparatus of claim 1, the adjustment component to adjust the propagation direction of the first set of light rays such that the number of the second set of light rays incident to the light guiding component changes and/or such that the angle of incidence of the second set of light rays incident to the light guiding component changes.
4. The light source apparatus of claim 3, the adjustment assembly comprising:
the first transparent electrode and the transparent electrode are oppositely arranged;
a functional layer located between the first transparent electrode and the second transparent electrode;
the first transparent electrode and the second transparent electrode are used for adjusting the functional layer to be in different states based on control voltage, so that the propagation directions of light rays incident into the functional layer are different;
the functional layer is a polymer dispersed liquid crystal layer, and the control voltage is used for adjusting the haze of the polymer dispersed liquid crystal layer so as to control the scattering parameter of the adjusting component;
or, the functional layer is a birefringence material layer, the control voltage is used for adjusting the state switching of the birefringence material layer between a first refractive index and a second refractive index, and the first refractive index is different from the second refractive index.
5. The light source apparatus of claim 1, the adjustment component to adjust the transmittance of the first set of light rays such that the number of second sets of light rays incident to the light guide component varies;
the adjustment assembly includes:
the through hole array is provided with a plurality of through holes with adjustable conduction states, and the quantity of the second light ray set entering the light guide assembly through the adjusting assembly is adjusted by adjusting the conduction quantity of the through holes;
or, two oppositely arranged gratings, wherein one grating can relatively move relative to the other grating under the control of a control voltage, so as to adjust the number of the second light ray sets entering the light guide assembly through the adjusting assembly under different relative positions.
6. An electronic system, comprising:
a light source device: the device comprises a light source component, an adjusting component and a light guide component; the light source component is used for emitting a first light ray set; the adjusting assembly is positioned in the irradiation range of the first light set and used for forming a second light set, and the adjusting assembly can adjust the proportion of the first light set in the second light set; the light guide assembly is positioned in an irradiation range of the second light ray set and used for forming a third light ray set by the incident second light ray set, wherein the third light ray set can be used as an input light ray set of the display device;
a display device: the display state is switched according to the image data, so that the third light ray set forms a fourth light ray set;
the control device is at least used for adjusting the proportion through the adjusting component so as to adjust the display brightness of the electronic system.
7. The electronic system of claim 6, wherein the control device selects one of at least two control modes to adjust the display brightness of the electronic system after acquiring the brightness adjustment command;
the at least two regulation modes comprise:
adjusting the proportion through the adjusting component to adjust the display brightness of the electronic system;
and adjusting the brightness of the light source assembly to adjust the display brightness of the electronic system.
8. The electronic system of claim 7, the method of the control device adjusting display brightness of the electronic system comprising:
if the required display brightness is not less than the set threshold value, adjusting the display brightness of the electronic system by adjusting the brightness of the light source assembly;
and if the required display brightness is smaller than the set threshold value, the proportion is adjusted through the adjusting component so as to adjust the display brightness of the electronic system.
9. The electronic system of claim 7, the method of the control device adjusting brightness of the electronic system comprising:
if the required display brightness is not less than the set threshold value, adjusting the display brightness of the electronic system by adjusting the brightness of the light source assembly;
and if the required display brightness is smaller than the set threshold, based on the acquired adjusting instruction, selecting to adjust the display brightness of the electronic system by adjusting the brightness of the light source assembly or selecting to adjust the proportion by the adjusting assembly to adjust the display brightness of the electronic system.
10. The electronic system of claim 9, further comprising a power supply device for supplying power required for operation to the electronic system, the control device being configured to obtain the adjustment instruction based on a power supply status of the power supply device;
or, the electronic system further includes a detection device for detecting the brightness of the ambient light, and the control device is configured to obtain the adjustment instruction based on a result of detection of the ambient light by the detection device.
CN201911403383.6A 2019-12-30 2019-12-30 Light source device and electronic system Active CN111025761B (en)

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