WO2016106900A1 - 一种液晶显示器背光模组及液晶显示器 - Google Patents

一种液晶显示器背光模组及液晶显示器 Download PDF

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Publication number
WO2016106900A1
WO2016106900A1 PCT/CN2015/071212 CN2015071212W WO2016106900A1 WO 2016106900 A1 WO2016106900 A1 WO 2016106900A1 CN 2015071212 W CN2015071212 W CN 2015071212W WO 2016106900 A1 WO2016106900 A1 WO 2016106900A1
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Prior art keywords
light
guide plate
port
light guide
liquid crystal
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PCT/CN2015/071212
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English (en)
French (fr)
Inventor
郑颖博
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深圳市华星光电技术有限公司
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Priority to US14/418,621 priority Critical patent/US20160249421A1/en
Publication of WO2016106900A1 publication Critical patent/WO2016106900A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
    • 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
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0038—Linear indentations or grooves, e.g. arc-shaped grooves or meandering grooves, extending over the full length or width of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033—Means for improving the coupling-out of light from the light guide
    • G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/0045—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
    • 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
    • G09G3/3413—Details of control of colour illumination sources
    • 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
    • G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • G02F1/133612—Electrical details
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the 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
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving

Definitions

  • the present invention relates to the field of liquid crystal display technology, and in particular to a liquid crystal display backlight module and a liquid crystal display.
  • Liquid Crystal Display is the most commonly used mobile phone display screen.
  • Liquid crystal display technology has evolved from black and white screens to color screens and from twisted nematic LCDs (TN-LCDs) to thin film transistor LCDs (TFT-LCDs).
  • TN-LCDs twisted nematic LCDs
  • TFT-LCDs thin film transistor LCDs
  • FIG. 1 is a circuit diagram of the light source circuit in the existing backlight module. As shown in FIG. 1 , the existing light source circuit is formed by connecting multiple light emitting diode circuits in parallel, wherein each light emitting diode circuit is formed by connecting a plurality of light emitting diodes in series.
  • the structure of the light source circuit makes the liquid crystal display of the mobile phone operate, no matter how the brightness and darkness of the picture displayed by the display and the demand change, the light emitting diodes in the light source circuit are all in the state of being lit, that is, the light emitting circuit Energy consumption continues to be maintained at 100%.
  • the structure of the existing backlight module makes the energy consumption of the liquid crystal display usually accounts for 60% to 70% of the overall energy consumption of the mobile phone. Due to the limit of the battery capacity of the mobile phone, the large energy consumption of the liquid crystal display also greatly shortens the standby time of the mobile phone.
  • an embodiment of the present invention first provides a liquid crystal display backlight module, where the backlight module includes a light source circuit and a light guide plate, wherein
  • the light source circuit includes a control circuit and a plurality of light emitting units, each light emitting unit is disposed at a side of the light guide plate and connected to the control circuit, and each light emitting unit is turned on or off under the control of the control circuit;
  • the light guide plate is configured to process the light incident from the side surface and then emit it from the front side.
  • the first port of each lighting unit is connected to a first port of a preset power source, and the second port is connected to a corresponding port of the control circuit.
  • the light emitting unit comprises a light emitting diode
  • the positive pole of the light emitting diode is connected to a first port of a preset power source
  • the negative pole is connected to a corresponding port of the control single channel.
  • control circuit comprises a controllable switch
  • the first port of the controllable switch is connected to the second port of the preset power source, and each of the second ports of the controllable switch is respectively illuminated with each The second port of the unit corresponds to the connection.
  • control circuit controls the duration of the lighting unit to be turned on or off by adjusting the duty ratio of the control signal, thereby adjusting the brightness of the lighting unit.
  • the light guide plate includes first and second surfaces parallel to each other, the first surface is provided with columnar protrusions parallel to each other, and the columnar protrusion or the second surface is provided with a guide Optical port.
  • the light guide plate includes a first surface and a second surface that are parallel to each other, and the first surface and the second surface are provided with columnar protrusions parallel to each other, the first surface or the second surface
  • the columnar projection on the surface is provided with a light guiding opening.
  • the light guiding openings are non-uniformly distributed along the axial direction of the columnar projections.
  • the further away from the first end of the stud bump the shorter the spacing between adjacent two light guides in the same stud bump.
  • the present invention also provides a liquid crystal display comprising the liquid crystal display backlight module of any of the above.
  • the light source circuit in the backlight module can realize independent control of the light emitting unit.
  • the control circuit can illuminate the desired light-emitting unit while extinguishing the unnecessary light-emitting units. Since the light-emitting units do not need to be completely lit, the power consumption of the backlight module is effectively reduced, thereby prolonging the usage time of the power device (such as a mobile phone, etc.).
  • the light source circuit provided by the present invention is also capable of adjusting the brightness of the light source.
  • the duty cycle can adjust the on/off duration of the controllable switch, that is, the adjustment of the duration of the LED to be turned on or off. In a period of time, the longer the LED is lit, the brighter the light source looks. Conversely, the shorter the LED is illuminated for a period of time, the darker the light source looks. This also achieves the adjustment of the brightness of the light source.
  • the surface of the light guide plate provided by the present invention is provided with columnar protrusions parallel to each other, the columnar protrusions can cause the light to be relatively converged when being transmitted in the light guide plate. Therefore, the light guide plate provided by the present invention has a better beam light effect than the existing light guide plate. This also causes the crosstalk of light in the light guide plate to be greatly reduced.
  • the light guide port in the light guide plate provided by the present invention is distributed in a non-uniform distribution. Specifically, in each of the columnar protrusions provided with the light guiding ports, the farther from the first end of the columnar protrusions (ie, the end near the light emitting unit), between the two adjacent light guiding ports of the columnar protrusions The shorter the interval, the denser the distribution of the light guides.
  • the light guides near the light-emitting unit emit more light, but the light guides are sparsely distributed near the light-emitting unit; and the light guides that are far from the light-reflecting unit emit less light, but are far away from the light-emitting unit.
  • the light guide port is densely distributed. In this way, the light emitted from each area of the light guide plate is relatively balanced, thereby ensuring uniformity of light emission on the surface of the light guide plate.
  • FIG. 1 is a circuit diagram of a light source circuit of a conventional liquid crystal panel backlight module
  • FIG. 2 is a circuit diagram of a light source circuit of a backlight module according to an embodiment of the invention
  • 3a is a schematic structural view of a conventional backlight module
  • 3b is an optical path effect diagram of the existing light guide plate
  • 4 and 5 are a front view and a top view, respectively, of a light guide plate according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural view of a light guide plate manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a backlight module according to an embodiment of the present invention.
  • FIG. 8 is a diagram showing an effect of an optical path in a light guide plate when a light emitting unit is lit according to an embodiment of the present invention
  • FIG. 9 is a diagram showing an effect of an optical path in a light guide plate when a plurality of light emitting units are lit according to an embodiment of the present invention.
  • Figure 10 is a light path diagram of a light guide plate in accordance with one embodiment of the present invention.
  • FIG. 11 is a schematic view showing the arrangement of light guiding ports in a light guide plate according to an embodiment of the invention.
  • 12 and 13 are a front view and a plan view, respectively, of a light guide plate according to another embodiment of the present invention.
  • FIG. 14 is a schematic structural view of a light guide plate according to still another embodiment of the present invention.
  • Figure 15 is a schematic view showing the structure of a light guide plate according to still another embodiment of the present invention.
  • the embodiment provides a liquid crystal display backlight module capable of independently controlling the lighting state of each light emitting unit, and the backlight module includes a light source circuit and a guide. Light board.
  • FIG. 2 is a circuit diagram showing a light source circuit of the backlight module.
  • the light source circuit provided in this embodiment includes a control circuit 202 and a plurality of light emitting units 201.
  • Each of the light emitting units 201 is connected to a corresponding port of the control circuit 202 to be turned on or off under the control of the control circuit 202.
  • the light emitting unit is disposed on a side of the light guide plate as a side light source of the light guide plate.
  • the light guide plate can process the light incident from the side surface and then emit the light from the front surface of the light guide plate, that is, convert the side light source into a surface light source.
  • the first port of each of the light emitting units 201 is connected to the first port of the preset power source, and the second port of each of the light emitting units 201 is connected to the corresponding port of the control circuit 202.
  • the backlight module uses a light emitting diode as a light emitting unit.
  • the anode of the LED is connected to the first port of the preset power source (ie, the anode of the preset power source, that is, the A port), and the cathode of the LED is connected to the corresponding port of the control circuit 202.
  • control circuit 202 includes a controllable switch having a first port and a plurality of second ports.
  • the first port of the controllable switch is connected to the second port of the preset power source (ie, the negative pole of the preset power source, that is, the K port), and each second port of the controllable switch is connected to the negative pole of the corresponding LED.
  • the controllable switch When it is necessary to illuminate the LED D1, the controllable switch will turn on the B1 port and the K port. Light-emitting diode The voltage across D1 reaches the operating voltage and emits light outward. Since the controllable switch can independently control the connection between the ports (B1 port to Bn port) connected to the LED and the K port, the controllable switch can realize the independent control of the LEDs in the off state. . This means that the controllable switch can control one or more of the LEDs to be lit or extinguished simultaneously.
  • control circuit may also be disposed between the light emitting unit and the positive pole of the preset power source, the first port of each light emitting unit is connected to the control circuit, and the second port is connected to the negative pole of the preset power source.
  • the invention is not limited thereto.
  • the light source circuit provided by the embodiment can realize independent control of the light emitting unit.
  • the control circuit can illuminate the desired light-emitting unit while extinguishing the unnecessary light-emitting unit. Since the light-emitting unit does not need to be all in the lighting state, the energy consumption of the backlight module is effectively reduced.
  • the light source circuit provided in this embodiment can reduce the energy consumption by about 40% compared with the existing light source circuit. ), thereby extending the length of use of powered devices (such as cell phones).
  • the light source circuit provided by the embodiment can also adjust the brightness of the light source.
  • the controllable switch 202 can adjust the duration of the LED to be turned on or off by adjusting the duty ratio of the control signal. In a period of time, the longer the LED is lit, the brighter the light source looks. Conversely, the shorter the LED is illuminated for a period of time, the darker the light source looks. This also achieves the adjustment of the brightness of the light source.
  • the light emitting unit and/or the control circuit may also be implemented by other reasonable circuit forms, and the present invention is not limited thereto.
  • the control circuit is implemented by using an FPGA circuit, which enables the switch circuit to have a faster response speed, thereby making the control circuit more timely and accurate to control the light-emitting unit.
  • the existing light source circuit takes the form of a side light source, that is, the LED as a light source is disposed on the light guide plate.
  • the LED When the LED is lit, the light emitted by the LED enters the light guide plate from the side of the light guide plate.
  • the existing light guide plate is a flat plate structure. It can be seen from the light guiding effect diagram of the light guide plate shown in Fig. 3b that the light incident into the light guide plate exhibits a divergent form. This indicates that the existing light guide plate cannot effectively beam the incident light, which makes the light incident in the adjacent region in the light guide plate susceptible to crosstalk.
  • the embodiment further provides a light guide plate capable of effectively functioning as a beam.
  • 4 and 5 respectively show a front view and a top view of the light guide plate provided by the embodiment.
  • the light guide plate provided in this embodiment includes a first surface 401 and a second surface 402 which are parallel to each other, and the first surface 401 and The second surface 402 is provided with parallel columnar protrusions 403, and the adjacent columnar protrusions are spaced apart by a predetermined distance.
  • Fig. 6 shows an apparatus for manufacturing a light guide plate as shown in Figs. 4 and 5 provided by the present embodiment.
  • the material of the light guide plate is engineering plastic.
  • the melting furnace first melts the engineering plastic into a liquid state, and then transports the liquid engineering plastic to the rolling portion through the T-shaped head. There is a certain distance between the T-shaped head and the rolled portion. The liquid engineering plastic is slowly cooled during the descending process from the T-shaped head, and the engineering plastic is not completely cooled when it reaches the rolling portion, which is advantageous for roll forming.
  • the rolling portion of the light guide plate manufacturing apparatus includes a first roller and a second roller that rotate in cooperation with each other.
  • the first roller and the second roller are both provided with protrusions.
  • the first roller and the second roller are capable of rolling an incompletely cooled engineering plastic from the T-shaped head to form a light guide plate structure as shown in FIGS. 4 and 5.
  • the projections on the roller can be a plurality of circumferential projections disposed on the surface of the roller shaft, or a plurality of axial cylindrical projections disposed on the surface of the roller shaft.
  • the protrusions on the first roller and the second roller are circumferentially convex. Since the roller having the circumferential projection suppresses the engineering plastic, the convex space and the roller shaft are not formed into a closed space, so that the air in the engineering plastic can be efficiently discharged. This also makes the structure of the light guide plate obtained by rolling more uniform, and less impurities inside the light guide plate, thereby ensuring good light guiding performance of the light guide plate.
  • the engineering plastic is transferred to the conveying portion, so that the light guiding plate from the rolling portion is conveyed to the rear end of the production line by the conveying portion. Since the light guide plate from the rolling portion is not completely cooled, the process of transporting the light guide plate on the transfer is also a process of cooling the engineering plastic.
  • the transport portion includes a plurality of elastic rollers arranged side by side to support and transport the light guide plate from the roller portion.
  • the defect detecting portion in the device also performs defect inspection on the light guide plate to ensure structural integrity and reliability of the light guide plate. Further, since the light guide plate produced has columnar projections, this causes easy accumulation of ash between the columnar projections. Therefore, the light guide plate manufacturing apparatus provided in the embodiment further performs a film coating process on the light guide plate after the defect inspection, so that the upper and lower surfaces of the light guide plate are respectively coated with a protective film.
  • the protective film can not only effectively ensure the cleanliness and dust-free degree of the light guide plate, but also protect the surface of the light guide plate from damage.
  • the protective film coated on the light guide plate is a film. Of course, in other embodiments of the present invention, other reasonable forms of protective film may also be used to coat the light guide plate.
  • Figure 8 and Figure 9 respectively shows an optical path diagram in the light guide plate when one light emitting unit and a plurality of light emitting units are turned on.
  • the columnar protrusions provided by the light guide plate provided in the embodiment can make the light in a relatively converging state when the light is transmitted in the light guide plate, compared with the existing guide.
  • the light guide plate provided in this embodiment has a better beam light effect. This also causes the crosstalk of light in the light guide plate to be greatly reduced.
  • the light guide plate Since one of the functions of the light guide plate is to convert the side light source into a surface light source, it is also necessary to emit light from the light guide plate from the surface of the light guide plate.
  • the light in the light guide plate is transmitted in the form of total reflection. In order to enable the light to be emitted from the surface of the light guide plate, it is necessary to damage the total reflection structure of the light guide plate.
  • the light guide plate provided in this embodiment breaks the total reflection structure of the light guide plate by providing a light guide port on the columnar protrusion. In this way, part of the light in the light guide plate can be emitted from the light guide port, thereby realizing the function of converting the side light source into a surface light source.
  • the light guiding ports are all disposed in the columnar protrusions on the first surface of the light guiding plate, thereby ensuring that light is not emitted from the second surface of the light guiding plate, thereby ensuring The utilization of light emitted by the light source circuit improves the brightness of the backlight module.
  • the light emitting unit Since the light emitting unit is disposed on one side of the light guide plate, light incident from the light guide plate is emitted from the respective light guide ports. Therefore, this will result in less light being emitted from the light guiding port which is farther from the light emitting unit.
  • the light distribution port of the light guide plate provided in this embodiment is distributed in a non-uniformity of the light guide port. Specifically, in each of the columnar protrusions provided with the light guiding ports, the farther from the first end of the columnar protrusions (ie, the end near the light emitting unit), between the two adjacent light guiding ports of the columnar protrusions The shorter the interval, the denser the distribution of the light guides.
  • the light guides near the light-emitting unit emit more light, but the light guides are sparsely distributed near the light-emitting unit; and the light guides that are far from the light-reflecting unit emit less light, but are far away from the light-emitting unit.
  • the light guide port is densely distributed. In this way, the light emitted from each area of the light guide plate is relatively balanced, thereby ensuring uniformity of light emission on the surface of the light guide plate.
  • the light guide plate may also adopt a structure as shown in FIGS. 12 and 13.
  • 12 and 13 respectively show a front view and a plan view of the light guide plate.
  • the light guide plate can also be regarded as being arranged by a plurality of cylinders arranged side by side.
  • the light guide plate may also adopt a structure as shown in FIG.
  • the light guide plate compared to the light guide plate shown in FIG. 4, the light guide plate is formed with only columnar protrusions on the first surface, and the second surface is still a planar structure.
  • the light guiding ports are each disposed on the second surface. This is because the second surface is a planar structure, and it is easier to form a light guiding port on the planar structure (for example, wet etching or the like).
  • the light guide port may also be disposed on the columnar protrusion of the first surface in the case where the process and cost permit, and the present invention is not limited thereto.
  • the light guide plate may adopt the structure as described in FIG.
  • the light guide plate shown in FIG. 15 has the same structure as the light guide plate shown in FIG. 14 except that there is no space between the adjacent columnar protrusions, and details are not described herein again.
  • the light source circuit in the backlight module provided by the present invention can realize independent control of the light emitting unit.
  • the control circuit can illuminate the desired light-emitting unit while extinguishing the unnecessary light-emitting units. Since the light-emitting units do not need to be completely lit, the power consumption of the backlight module is effectively reduced, thereby prolonging the use time of the power-consuming device.
  • the light source circuit provided by the present invention can also achieve adjustable brightness of the light source.
  • the controllable switch can adjust the duration of time when the LED is turned on or off by adjusting the duty ratio of the control signal. In a period of time, the longer the LED is lit, the brighter the light source looks. Conversely, the shorter the LED is illuminated for a period of time, the darker the light source looks. This also achieves the adjustment of the brightness of the light source.
  • the surface of the light guide plate provided by the present invention is provided with columnar protrusions parallel to each other, the columnar protrusions can cause the light to be relatively converged when being transmitted in the light guide plate. Therefore, the light guide plate provided by the present invention has a better beam light effect than the existing light guide plate. This also causes the crosstalk of light in the light guide plate to be greatly reduced.
  • the light guide port in the light guide plate provided by the present invention is distributed in a non-uniform distribution of the light guide port. Specifically, in each of the columnar protrusions provided with the light guiding ports, the farther from the first end of the columnar protrusions (ie, the end near the light emitting unit), between the two adjacent light guiding ports of the columnar protrusions The shorter the interval, the denser the distribution of the light guides.
  • the light guides near the light-emitting unit emit more light, but the light guides are sparsely distributed near the light-emitting unit; and the light exits from the light-guiding unit of the light-reflecting unit is less, but is far away from the light-emitting unit.
  • the light guide port is densely distributed. In this way, the light emitted from each area of the light guide plate is relatively balanced, thereby ensuring uniformity of light emission on the surface of the light guide plate.

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Abstract

一种液晶显示器背光模组及液晶显示器，该背光模组包括光源电路和导光板，其中，光源电路包括控制电路（202）和多个发光单元（201），各个发光单元（201）设置在导光板的侧面且与控制电路（202）连接，各个发光单元（201）在控制电路（202）的控制下点亮或熄灭；导光板用于将从侧面射入的光线进行处理后由正面射出。相较于现有背光模组的光源电路，该背光模组具有更低的能耗。

Description

一种液晶显示器背光模组及液晶显示器
相关技术的交叉引用
本申请要求享有2014年12月31日提交的名称为：“一种液晶显示器背光模组及液晶显示器”的中国专利申请CN201410856635.1的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及液晶显示技术领域，具体地说，涉及一种液晶显示器背光模组及液晶显示器。
背景技术
随着移动技术的发展，手机已成为人们日常生活中必不可少的通讯工具。目前液晶显示器(Liquid Crystal Display，简称为LCD)是最为常用的手机显示屏幕。液晶显示技术经历了从黑白屏幕到彩色屏幕以及从扭曲向列相LCD(TN-LCD)到薄膜晶体管LCD(TFT-LCD)的发展。
伴随着液晶显示技术的发展，应用在手机中的液晶显示器的尺寸也在不断变大，这也就导致了液晶显示器的能耗也随之越来越高。背光模组是液晶显示器的主要耗电单元，图1示出了现有的背光模组中光源电路的电路示意图。如图1所示，现有的光源电路是由多路发光二极管电路并联而成，其中，每一路发光二极管电路又由多个发光二极管串联而成。而光源电路的这种结构使得手机的液晶显示器在工作时，无论显示器所表现的画面的亮暗分布及需求如何变化，光源电路中的发光二极管均处在全部点亮的状态，即发光电路的能耗持续维持在100％。
现有的背光模组的这种结构使得液晶显示屏的能耗通常占到了手机整体能耗的60％～70％。由于手机电池容量的限值，液晶显示屏的这种大能耗的特性也极大缩短了手机的待机时长。
基于上述情况，亟需一种具有低能耗特性的液晶显示器背光模组。
发明内容
本发明所要解决的问题是为了解决现有的液晶显示器背光模组能耗过大的缺陷。为解决上述问题，本发明的实施例首先提供了一种液晶显示器背光模组，所述背光模组包括光源电路和导光板，其中，
所述光源电路包括控制电路和多个发光单元，各个发光单元设置在所述导光板的侧面且与所述控制电路连接，各个发光单元在所述控制电路的控制下点亮或熄灭；
所述导光板用于将从侧面射入的光线进行处理后由正面射出。
根据本发明的一个实施例，各个发光单元的第一端口与预设电源的第一端口连接，第二端口与所述控制电路的相应端口连接。
根据本发明的一个实施例，所述发光单元包括发光二极管，所述发光二极管的正极与预设电源的第一端口连接，负极与所述控制单路的相应端口连接。
根据本发明的一个实施例，所述控制电路包括可控开关，所述可控开关的第一端口与预设电源的第二端口连接，所述可控开关的各个第二端口分别与各个发光单元的第二端口对应连接。
根据本发明的一个实施例，所述控制电路通过调节控制信号占空比来控制所述发光单元点亮或熄灭的时长，从而调节所述发光单元的亮度。
根据本发明的一个实施例，所述导光板包括相互平行的第一表面和第二表面，所述第一表面设置有相互平行的柱状凸起，所述柱状凸起或第二表面设置有导光口。
根据本发明的一个实施例，所述导光板包括相互平行的第一表面和第二表面，所述第一表面和第二表面设置有相互平行的柱状凸起，所述第一表面或第二表面上的柱状凸起设置有导光口。
根据本发明的一个实施例，所述导光口沿所述柱状凸起的轴向非均匀分布。
根据本发明的一个实施例，距离柱状凸起的第一端越远，同一柱状凸起中相邻的两个导光口之间的间隔越短。
本发明还提供了一种液晶显示器，所述液晶显示器包括如上任一项所述的液晶显示器背光模组。
相较于现有背光模组的光源电路，本发明所提供的背光模组中的光源电路能够实现对发光单元的独立控制。这样，当根据液晶显示器的显示需要不必点亮全部发光单元时，控制电路能够将需要的发光单元点亮，同时将不需要的发光单元熄灭。由于发光单元不需要全部处于点亮状态，因此也就有效降低了背光模组的能耗，从而延长了用电装置(例如手机等)的使用时长。
此外，本发明所提供的光源电路还能够调节光源亮度。具体地，通过调节控制信号的 占空比能够实现对可控开关通断时长的调节，也就是可以实现发光二极管点亮或熄灭的时长的调节。而在一段时间内，发光二极管点亮的时长越长，那么光源看上去也就越亮；反之，在一段时间内，发光二极管点亮的时长越短，那么光源看上去也就越暗。这样也就实现了对光源亮度的调节。
由于本发明所提供的导光板的表面设置有相互平行的柱状凸起，而柱状凸起能够使得光线在导光板内传输时呈现相对收束的状态。因此，相较于现有的导光板，本发明所提供的导光板具有更好地束光效果。这也就使得导光板内光线的串扰得到大幅降低。
为了保证导光板表面的出光均匀性，本发明所提供的导光板中导光口的分布方式为非均匀性分布。具体地，在各个设有导光口的柱状凸起中，距离柱状凸起的第一端(即靠近发光单元的一端)越远，该柱状凸起中相邻的两个导光口之间的间隔越短，即导光口的分布越密集。
靠近发光单元的各个导光口射出的光线较多，但靠近发光单元的位置处导光口分布较为稀疏；而远离反光单元的各个导光口射出的光线较少，但远离发光单元的位置处导光口分布较为密集。这样也就使得导光板各个区域射出的光线较为均衡，从而保证了导光板表面的出光均匀性。
本发明的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要的附图做简单的介绍：
图1是现有的液晶面板背光模组的光源电路的电路示意图；
图2是根据本发明一个实施例的背光模组的光源电路的电路示意图；
图3a是现有的背光模组的结构示意图；
图3b是现有导光板内的光路效果图；
图4和图5分别是根据本发明一个实施例的导光板的主视图和俯视图；
图6是根据本发明一个实施例的导光板制造装置的结构示意图；
图7是根据本发明一个实施例的背光模组的结构示意图；
图8是根据本发明一个实施例的一个发光单元点亮时导光板内的光路效果图；
图9是根据本发明一个实施例的多个发光单元点亮时导光板内的光路效果图；
图10是根据本发明一个实施例的导光板内的光路图；
图11是根据本发明一个实施例的导光板中的导光口的排列示意图；
图12和图13分别是根据本发明另一个实施例的导光板的主视图和俯视图；
图14是根据本发明又一个实施例的导光板的结构示意图；
图15是根据本发明再一个实施例的导光板的结构示意图。
具体实施方式
以下将结合附图及实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是，只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形成的技术方案均在本发明的保护范围之内。
同时，在以下说明中，出于解释的目的而阐述了许多具体细节，以提供对本发明实施例的彻底理解。然而，对本领域的技术人员来说显而易见的是，本发明可以不用这里的具体细节或者所描述的特定方式来实施。
为了解决现有的液晶显示器背光模组能耗过高的问题，本实施例提供了一种能够独立控制各个发光单元的亮灭状态的液晶显示器背光模组，该背光模组包括光源电路和导光板。
图2示出了该背光模组的光源电路的电路示意图。
如图2所示，本实施例所提供的光源电路包括控制电路202和多个发光单元201。其中，各个发光单元201与控制电路202的相应端口连接，以在控制电路202的控制下点亮或熄灭。本实施例中，发光单元设置在导光板的侧面，作为导光板的侧光源。导光板能够将从侧面射入的光线进行处理后由导光板的正面射出，即将侧光源转换为面光源。
本实施例中，各个发光单元201的第一端口与预设电源的第一端口连接，各个发光单元201的第二端口与控制电路202的相应端口连接。如图2所示，本实施例所提供的背光模组中采用发光二极管作为发光单元。其中，发光二极管的正极与预设电源的第一端口(即预设电源的正极，也就是A端口)连接，发光二极管的负极与控制电路202的相应端口连接。
本实施例中，控制电路202包括可控开关，该可控开关具有第一端口和多个第二端口。其中，可控开关的第一端口与预设电源的的第二端口(即预设电源的负极，也就是K端口)连接，可控开关的各个第二端口与相应的发光二极管的负极连接。
当需要点亮发光二极管D1时，可控开关将导通B1端口和K端口。此时发光二极管 D1两端的电压达到工作电压，从而向外发出光线。由于可控开关能够独立控制与发光二极管关连接的各个端口(B1端口～Bn端口)与K端口之间连接的通断，因此可控开关也就可以实现对各个发光二极管亮灭状态的独立控制。这也就是说，可控开关可以控制一个或多个发光二极管同时点亮或熄灭。
当然，在本发明的其他实施例中，控制电路也可以设置在发光单元与预设电源的正极之间，各个发光单元的第一端口与控制电路连接，第二端口与预设电源的负极连接，本发明不限于此。
相较于现有背光模组的光源电路，本实施例所提供的光源电路能够实现对发光单元的独立控制。这样，当根据液晶显示器的显示需求不必点亮全部发光单元时，控制电路能够将需要的发光单元点亮，同时将不需要的发光单元熄灭。由于发光单元不需要全部处于点亮状态，因此也就有效降低了背光模组的能耗(例如本实施例所提供的光源电路相较于现有的光源电路，其能耗能够下降40％左右)，从而延长了用电器件(例如手机)的使用时长。
此外，本实施例所提供的光源电路还能够调节光源亮度。具体地，本实施例中，可控开关202通过调节控制信号的占空比，可以调节发光二极管点亮或熄灭的时长。而在一段时间内，发光二极管点亮的时长越长，那么光源看上去也就越亮；反之，在一段时间内，发光二极管点亮的时长越短，那么光源看上去也就越暗。这样也就实现了对光源亮度的调节。
需要说明的是，在本发明的其他实施例中，发光单元和/或控制电路也可以采用其他合理的电路形式来实现，本发明不限于此。例如在本发明的一个实施例中，控制电路采用FPGA电路来实现，FPGA电路能够使得开关电路具有更快的响应速度，从而使得控制电路对发光单元的控制更为及时精确。
图3a和图3b分别示出了现有的光源电路的结构示意图和导光板的导光效果图。从图3a中可以看出，现有的光源电路采用了侧光源的形式，即作为光源的LED设置在导光板的测量。当LED点亮时，LED发出的光线由导光板的侧面进入到导光板中。现有的导光板为平板结构。从图3b所示出的导光板的导光效果图中可以看出，射入到导光板内的光线呈现发散的形态。这表明现有的导光板无法有效地对射入的光线起到束光作用，这也就使得导光板内的相邻区域中射入的光线容易发生串扰。
为了解决上述问题，本实施例还提供了一种能够有效起到束光作用的导光板。图4和图5分别示出了本实施例所提供的导光板的主视图和俯视图。从图4和图5中可以看出，本实施例所提供的导光板包括相互平行的第一表面401和第二表面402，第一表面401和 第二表面402上均设置有平行的柱状凸起403，相邻的柱状凸起之间间隔有预设距离。
图6示出了本实施例所提供的用于制造如图4和图5所示的导光板的装置。
本实施例例中，导光板原材料为工程塑胶。在生产的过程中，融化炉首先将工程塑胶融化为液态，随后将液态的工程塑胶通过T形头输送到辊压部。T形头与辊压部之间存在一定距离。液态的工程塑胶从T形头输出后将在下降的过程中慢慢冷却，而当到达辊压部时，工程塑胶并未完全冷却，从而有利于辊压成型。
本实施例中，导光板制造装置的辊压部包括彼此配合转动的第一辊压轮和第二滚压轮。由于需要在导光板的第一表面和第二表面均形成柱状凸起，因此本实施例中，第一辊压轮和第二辊压轮上均设置有凸起。第一辊压轮和第二辊压轮能够对来自T形头的未完全冷却的工程塑胶进行辊压，从而形成如图4和图5所示的导光板结构。
在本发明的不同实施例中，滚压轮上的凸起可以为多个设置在辊压轴表面的周向凸起，也可以为多个设置在辊压轴表面的轴向柱状凸起。本实施例中第一辊压轮和第二辊压轮上的凸起为周向凸起。因为这种具有周向凸起的辊压轮在对工程塑胶进行压制时，不会由凸起与辊压轴形成密闭空间，从而能够有效地排出工程塑胶内的空气。这也就使得辊压得到的导光板的结构更加均匀，导光板内部的杂质更少，从而保证了导光板良好的导光性能。
辊压部完成对工程塑胶的辊压后，会将工程塑胶传输到传送部上，以便由传输部将来自辊压部的导光板向生产线后端输送。由于来自辊压部的导光板并未完全冷却，因此导光板在传输上传输的过程，也是工程塑胶冷却的过程。为了保证导光板在这一过程中不被损伤，本实施例中，传输部包括多个并排排列的弹性滚轮，以支撑和输送来自辊压部的导光板。
辊压后形成的导光板在传输部上传输的过程中，该装置中的缺陷检测部还会对导光板进行缺陷检查，以确保导光板的结构完整性和可靠性。此外，由于生产得到的导光板具有柱状凸起，这也就导致柱状凸起之间容易积灰。为此，本实施例所提供的导光板制造装置在进行缺陷检查后还会对导光板进行覆膜处理，以在导光板的上下表面分别涂覆上保护膜。该保护膜不但能够有效保证导光板的洁净度和无尘度，而且还能够保护导光板的表面不收损伤。本实施例中，涂覆在导光板上的保护膜为有胶膜。当然，在本发明的其他实施例中，还可以采用其他合理形式的保护膜来对导光板进行涂覆。
最后，通过对覆膜后的导光板进行切片处理，即可得到所需尺寸的导光板。
为了更加清楚地呈现图4和图5所示的导光板的束光性能，本实施例按照图7所示的方式，将发光单元放置在导光板的侧面，并打开发光单元的电源使其正常工作。图8和图 9分别示出了打开一个发光单元和多个发光单元时导光板内的光路图。
从图8和图9中可以看出，由于本实施例所提供的导光板所设置的柱状凸起能够使得光线在导光板内传输时呈现相对收束的状态，因此相较于现有的导光板，本实施例所提供的导光板具有更好地束光效果。这也就使得导光板内光线的串扰得到大幅降低。
由于导光板的作用之一是将侧光源转换为面光源，所以也就需要使导光板内的光线从导光板表面射出。而导光板内的光线是以全反射的形式传输的，为了能够使光线从导光板表面射出，也就需要破坏导光板的这种全反射结构。
如图10所示，本实施例所提供的导光板通过在柱状凸起上设置导光口，来破坏导光板的全反射结构。这样，导光板内的部分光线便可以由该导光口射出，从而实现了将侧光源转换为面光源的功能。本实施例中，如图11所示，导光口均设置在导光板的第一表面上的柱状凸起中，这样也就保证了光线不会从导光板的第二表面射出，从而保证了光源电路所发出的光线的利用率，提高了背光模组的亮度。
由于发光单元是设置在导光板的一侧，而导光板内射入的光线会从由各个导光口射出。因此这样将导致距离发光单元越远的导光口所射出的光线越少。为了保证导光板表面的出光均匀性，本实施例所提供的导光板中导光口的分布方式为导光口非均匀性分布。具体地，在各个设有导光口的柱状凸起中，距离柱状凸起的第一端(即靠近发光单元的一端)越远，该柱状凸起中相邻的两个导光口之间的间隔越短，即导光口的分布越密集。
靠近发光单元的各个导光口射出的光线较多，但靠近发光单元的位置处导光口分布较为稀疏；而远离反光单元的各个导光口射出的光线较少，但远离发光单元的位置处导光口分布较为密集。这样也就使得导光板各个区域射出的光线较为均衡，从而保证了导光板表面的出光均匀性。
需要说明的是，在本发明的其他实施例中，还可以采用其他合理方式来确保导光板的出光均匀性，本发明不限于此。
在本发明的一个实施例中，导光板也可以采用如图12和图13所示的结构。图12和图13分别示出了该导光板的主视图和俯视图。从这两个图中可以看出，相较于图4和图5所示出的导光板，该导光板中相邻的柱状凸起之间没有间隔，并且第一表面与第二表面处在了同一平面上。该导光板也就可以视为由多个圆柱体并排排列而成。
在本发明的又一个实施例中，导光板也可以采用如图14所示的结构。结合图4可以看出，相较于图4所示的导光板，该导光板仅仅在第一表面形成有柱状凸起，第二表面仍为平面结构。在该实施例中，导光口均设置在第二表面。这是因为第二表面为平面结构，在平面结构上形成导光口更为容易(例如湿刻蚀等方式)。而在第一表面的柱状凸起上形 成导光口较为困难(通常需要采用激光刻蚀等工艺)，这明显会提高导光板的生产难度及成本。当然，在工艺及成本许可的情况下，导光口也可以设置在第一表面的柱状凸起上，本发明不限于此。
在本发明的再一个实施例中，导光板可以采用如图15所述的结构。结合图14可以看出，图15所示的导光板除相邻柱状凸起之间不存在间隔外，其他结构均与图14所示的导光板相同，在此不再赘述。
相较于现有背光模组的光源电路，本发明所提供的背光模组中的光源电路能够实现对发光单元的独立控制。这样，当根据液晶显示器的显示需要不必点亮全部发光单元时，控制电路能够将需要的发光单元点亮，同时将不需要的发光单元熄灭。由于发光单元不需要全部处于点亮状态，因此也就有效降低了背光模组的能耗，从而延长了用电器件的使用时长。
此外，本发明所提供的光源电路还能够实现光源亮度的可调。具体地，可控开关通过调节控制信号的占空比，可以调节发光二极管点亮或熄灭的时长。而在一段时间内，发光二极管点亮的时长越长，那么光源看上去也就越亮；反之，在一段时间内，发光二极管点亮的时长越短，那么光源看上去也就越暗。这样也就实现了对光源亮度的调节。
由于本发明所提供的导光板的表面设置有相互平行的柱状凸起，而柱状凸起能够使得光线在导光板内传输时呈现相对收束的状态。因此，相较于现有的导光板，本发明所提供的导光板具有更好地束光效果。这也就使得导光板内光线的串扰得到大幅降低。
为了保证导光板表面的出光均匀性，本发明所提供的导光板中导光口的分布方式为导光口非均匀性分布。具体地，在各个设有导光口的柱状凸起中，距离柱状凸起的第一端(即靠近发光单元的一端)越远，该柱状凸起中相邻的两个导光口之间的间隔越短，即导光口的分布越密集。
靠近发光单元的各个导光口射出的光线较多，但靠近发光单元的位置处导光口分布较为稀疏；而远离反光单元的各个导光口射出的位置处光线较少，但远离发光单元的导光口分布较为密集。这样也就使得导光板各个区域射出的光线较为均衡，从而保证了导光板表面的出光均匀性。
应该理解的是，本发明所公开的实施例不限于这里所公开的特定结构、处理步骤或材料，而应当延伸到相关领域的普通技术人员所理解的这些特征的等同替代。还应当理解的是，在此使用的术语仅用于描述特定实施例的目的，而并不意味着限制。
说明书中提到的“一个实施例”或“实施例”意指结合实施例描述的特定特征、结构或特性包括在本发明的至少一个实施例中。因此，说明书通篇各个地方出现的短语“一 个实施例”或“实施例”并不一定均指同一个实施例。
为了方便，在此使用的多个项目、结构单元、组成单元和/或材料可出现在共同列表中。然而，这些列表应解释为该列表中的每个元素分别识别为单独唯一的成员。因此，在没有反面说明的情况下，该列表中没有一个成员可仅基于它们出现在共同列表中便被解释为相同列表的任何其它成员的实际等同物。另外，在此还可以连同针对各元件的替代一起来参照本发明的各种实施例和示例。应当理解的是，这些实施例、示例和替代并不解释为彼此的等同物，而被认为是本发明的单独自主的代表。
此外，所描述的特征、结构或特性可以任何其他合适的方式结合到一个或多个实施例中。在上面的描述中，提供一些具体的细节，例如长度、宽度、形状等，以提供对本发明的实施例的全面理解。然而，相关领域的技术人员将明白，本发明无需上述一个或多个具体的细节便可实现，或者也可采用其它方法、组件、材料等实现。在其它示例中，周知的结构、材料或操作并未详细示出或描述以免模糊本发明的各个方面。
虽然上述示例用于说明本发明在一个或多个应用中的原理，但对于本领域的技术人员来说，在不背离本发明的原理和思想的情况下，明显可以在形式上、用法及实施的细节上作各种修改而不用付出创造性劳动。因此，本发明由所附的权利要求书来限定。

Claims (20)

  1. 一种液晶显示器背光模组，其中，所述背光模组包括光源电路和导光板，其中，
    所述光源电路包括控制电路和多个发光单元，各个发光单元设置在所述导光板的侧面且与所述控制电路连接，各个发光单元在所述控制电路的控制下点亮或熄灭；
    所述导光板用于将从侧面射入的光线进行处理后由正面射出。
  2. 如权利要求1所述的背光模组，其中，各个发光单元的第一端口与预设电源的第一端口连接，第二端口与所述控制电路的相应端口连接。
  3. 如权利要求2所述的背光模组，其中，所述发光单元包括发光二极管，所述发光二极管的正极与预设电源的第一端口连接，负极与所述控制单路的相应端口连接。
  4. 如权利要求2所述的背光模组，其中，所述控制电路包括可控开关，所述可控开关的第一端口与预设电源的第二端口连接，所述可控开关的各个第二端口分别与各个发光单元的第二端口对应连接。
  5. 如权利要求1所述的背光模组，其中，所述控制电路通过调节控制信号占空比来控制所述发光单元点亮或熄灭的时长，从而调节所述发光单元的亮度。
  6. 如权利要求1所述的背光模组，其中，所述导光板包括相互平行的第一表面和第二表面，所述第一表面设置有相互平行的柱状凸起，所述柱状凸起或第二表面设置有导光口。
  7. 如权利要求1所述的背光模组，其中，所述导光板包括相互平行的第一表面和第二表面，所述第一表面和第二表面设置有相互平行的柱状凸起，所述第一表面或第二表面上的柱状凸起设置有导光口。
  8. 如权利要求6所述的背光模组，其中，所述导光口沿所述柱状凸起的轴向非均匀分布。
  9. 如权利要求7所述的背光模组，其中，所述导光口沿所述柱状凸起的轴向非均匀分布。
  10. 如权利要求8所述的背光模组，其中，距离柱状凸起的第一端越远，同一柱状凸起中相邻的两个导光口之间的间隔越短。
  11. 一种液晶显示器，其中，所述液晶显示器包括液晶显示器背光模组，所述背光模组包括光源电路和导光板，其中，
    所述光源电路包括控制电路和多个发光单元，各个发光单元设置在所述导光板的侧面且与所述控制电路连接，各个发光单元在所述控制电路的控制下点亮或熄灭；
    所述导光板用于将从侧面射入的光线进行处理后由正面射出。
  12. 如权利要求11所述的液晶显示器，其中，各个发光单元的第一端口与预设电源的第一端口连接，第二端口与所述控制电路的相应端口连接。
  13. 如权利要求12所述的液晶显示器，其中，所述发光单元包括发光二极管，所述发光二极管的正极与预设电源的第一端口连接，负极与所述控制单路的相应端口连接。
  14. 如权利要求12所述的液晶显示器，其中，所述控制电路包括可控开关，所述可控开关的第一端口与预设电源的第二端口连接，所述可控开关的各个第二端口分别与各个发光单元的第二端口对应连接。
  15. 如权利要求11所述的液晶显示器，其中，所述控制电路通过调节控制信号占空比来控制所述发光单元点亮或熄灭的时长，从而调节所述发光单元的亮度。
  16. 如权利要求11所述的液晶显示器，其中，所述导光板包括相互平行的第一表面和第二表面，所述第一表面设置有相互平行的柱状凸起，所述柱状凸起或第二表面设置有导光口。
  17. 如权利要求11所述的液晶显示器，其中，所述导光板包括相互平行的第一表面和第二表面，所述第一表面和第二表面设置有相互平行的柱状凸起，所述第一表面或第二表面上的柱状凸起设置有导光口。
  18. 如权利要求16所述的液晶显示器，其中，所述导光口沿所述柱状凸起的轴向非均匀分布。
  19. 如权利要求17所述的液晶显示器，其中，所述导光口沿所述柱状凸起的轴向非均匀分布。
  20. 如权利要求18所述的液晶显示器，其中，距离柱状凸起的第一端越远，同一柱状凸起中相邻的两个导光口之间的间隔越短。
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