WO2014166173A1 - 用于显示装置驱动控制的光敏控制器和显示装置 - Google Patents

用于显示装置驱动控制的光敏控制器和显示装置 Download PDF

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Publication number
WO2014166173A1
WO2014166173A1 PCT/CN2013/078910 CN2013078910W WO2014166173A1 WO 2014166173 A1 WO2014166173 A1 WO 2014166173A1 CN 2013078910 W CN2013078910 W CN 2013078910W WO 2014166173 A1 WO2014166173 A1 WO 2014166173A1
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WIPO (PCT)
Prior art keywords
resistor
terminal
sub
pixel
output
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PCT/CN2013/078910
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English (en)
French (fr)
Inventor
郭仁炜
董学
车春城
孟昭晖
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北京京东方光电科技有限公司
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Publication of WO2014166173A1 publication Critical patent/WO2014166173A1/zh

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Classifications

    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/36Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3607Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00Aspects of the constitution of display devices
    • G09G2300/04Structural and physical details of display devices
    • G09G2300/0439Pixel structures
    • G09G2300/0452Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/06Adjustment of display parameters
    • G09G2320/0626Adjustment of display parameters for control of overall brightness
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2360/00Aspects of the architecture of display systems
    • G09G2360/14Detecting light within display terminals, e.g. using a single or a plurality of photosensors
    • G09G2360/144Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a photosensitive controller and a display device for display device drive control. Background technique
  • Liquid crystal displays or LCD (Liquid Crystal Display) have a low power consumption of 4, and are therefore favored by engineers for a variety of electronic devices. Its main principle is to use the electric field to control the liquid crystal to adjust the light transmittance to display images, which can be applied to electronic products such as computers and mobile phones.
  • the conventional liquid crystal display includes: a demodulator 100, a timing controller 101, a data driving circuit 102, a gate driving circuit 103, and a display panel 104.
  • the display panel 104 includes: a plurality of gate lines and a plurality of data lines, wherein the gate lines and the data lines are disposed to intersect to form a plurality of sub-pixels of three different colors of red, green, and blue.
  • Each of the sub-pixels corresponds to a thin film transistor 30, including: a gate, a source and a drain, wherein the gate and the gate are electrically connected, the source and the data line are electrically connected, and the drain and the pixel of the sub-pixel are electrically connected. .
  • the data driving circuit 102 controls the signal output of the data lines G1-Gn
  • the gate driving circuit 103 controls the signal output of the gate lines Sl-Sn.
  • the power supply supplies the required voltage to each module
  • the demodulator 100 outputs image information of three different color sub-pixels of red, green and blue to the timing controller 101
  • the timing controller 101 controls the data driving circuit.
  • the gate driving circuit 103 sequentially turns on the thin film transistors connected to each of the gate lines one by one to input the data signals of the data driving circuit 102 into the corresponding sub-pixels, so that the liquid crystal of the sub-pixel region is deflected, Display different screens.
  • Embodiments of the present invention provide a light-sensitive controller and display device for display device drive control, which can change a screen display brightness according to a change in brightness of a surrounding environment.
  • An embodiment of the present invention provides a light-sensitive controller for driving control of a display device, including: a voltage source, a non-inverting input unit, a reverse input unit, a comparison unit, and a control unit;
  • the same direction input unit comprises: a first input terminal in the same direction, connected to the positive pole of the voltage source; a second input end in the same direction, connected to the negative pole of the voltage source; and a same output end;
  • the reverse input unit comprises: a reverse first input terminal connected to the same first input terminal; a reverse second input terminal connected to the same second input terminal; and a reverse output terminal;
  • the comparison unit comprises: a first input end of the comparison unit connected to the same output end; a second input end of the comparison unit connected to the reverse output end; a first output end of the comparison unit connected to the reverse second input end; Second output;
  • the control unit comprises: a first input end of the control unit connected to the reverse first input end; a second input end of the control unit connected to the second output end of the comparison unit; and a control unit output end for outputting a control signal, the control The signal is used to control the drive circuit of the display device according to changes in ambient brightness.
  • the same direction input unit includes: a photoresistor, a second resistor, and a first resistor, wherein
  • the first end of the photoresistor is a first input end of the same direction of the same input unit
  • a first end of the second resistor is connected to the second end of the photoresistor, and a second end of the second resistor is a second input end of the same direction of the same input unit;
  • a first end of the first resistor is coupled to the second end of the photoresistor, and a second end of the first resistor is a non-inverting output of the same input unit.
  • the reverse input unit includes:
  • the first end of the third resistor is an inverted first input of the reverse input unit
  • a first end of the fourth resistor is coupled to the second end of the third resistor, and a second end of the fourth resistor is a reverse second input of the reverse input unit;
  • a first end of the fifth resistor is coupled to the second end of the third resistor, and a second end of the fifth resistor is an inverted output of the reverse input unit.
  • the comparison unit includes: a comparator, a sixth resistor, a seventh resistor, an eighth resistor, and a triode;
  • the comparator includes a same end, an opposite end, and an output end, the same end of which is connected to the output end of the same input unit, and the opposite end of which is connected to the output end of the reverse input unit;
  • a first end of the seventh resistor is coupled to the output of the comparator
  • a first end of the sixth resistor is connected to the opposite end of the comparator, and a second end of the sixth resistor is connected to the second end of the seventh resistor;
  • the first end of the eighth resistor is connected to the second end of the seventh resistor;
  • the triode includes a base, an emitter and a collector, the base of the triode being connected to the second end of the eighth resistor, the emitter being the first output of the comparison unit, and the collector being the second output of the comparison unit.
  • control unit includes: a ninth resistor and a relay, wherein
  • the first end of the ninth resistor is a first input end of the control unit, and the second end of the ninth resistor is a second input end of the control unit;
  • the relay includes a first input end, a second input end, and an output end, wherein the first input end is opposite to the first end of the ninth resistor and the same direction of the first input end and the reverse input unit of the same input unit An input terminal is connected, and a second input end is connected to the second end of the ninth resistor and the second output end of the comparison unit, and the output end is the output end of the control unit.
  • the voltage of the voltage source is between 2V and 8V.
  • the resistances of the first resistor, the third resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, and the ninth resistor are between 1 ⁇ and 1000 ⁇ .
  • the resistances of the second resistor and the fourth resistor are between 1 ⁇ and 30 ⁇ .
  • An embodiment of the present invention further provides a display device, including: a plurality of pixels disposed on a display panel, a data driving circuit and a gate driving circuit for controlling display of a plurality of pixels, a timing controller, and a demodulator, the solution
  • the modulator is configured to output image information of each pixel to the timing controller, where the timing controller is configured to control output timings of the data driving circuit and the gate driving circuit, wherein each pixel includes a plurality of sub-pixels, and At least one of the plurality of sub-pixels is a brightening sub-pixel;
  • the display device further includes a photosensitive controller connected to the timing controller, the photosensitive controller adopting the photosensitive controller according to any one of the above, wherein the photosensitive controller is configured to output to the timing controller according to changes in ambient brightness a control signal for controlling display of the brightened sub-pixel.
  • the light-control controller is configured to output a control signal to the timing controller according to the change of the ambient brightness, where the control signal is used to control the display of the brightening sub-pixel, specifically:
  • the light-sensitive controller When the ambient brightness exceeds a preset threshold, the light-sensitive controller outputs an open signal to the timing controller, and the turn-on signal controls the data driving circuit to output a data signal to the brightening sub-pixel, so that the brightening sub-pixel is displayed;
  • the photosensitive controller When the ambient brightness is lower than a preset threshold, the photosensitive controller outputs a shutdown signal to the timing controller, and the shutdown signal controls the data driving circuit to stop outputting a data signal to the brightening sub-pixel No., such that the brightening sub-pixel is not displayed.
  • each of the pixels includes four sub-pixels of different colors, and the brightening sub-pixels are white sub-pixels.
  • the brightening sub-pixel is disposed opposite to the other three sub-pixels.
  • Embodiments of the present invention provide a light-sensitive controller and a display device for display device driving control. Since the display device adds a brightening sub-pixel and a light-sensitive controller, it is possible to select whether the brightening sub-pixel is displayed as the ambient brightness changes. , to adjust the display brightness.
  • the light-control controller output control signal controls the data driving circuit to display the output data signal to the brightening sub-pixel to improve the display brightness, so that the display device is more clear when the ambient brightness is high;
  • the photosensitive controller output control signal controls the data driving circuit to stop outputting the data signal to the brightening sub-pixel, that is, the brightening sub-pixel is not displayed, so that the display device can save the consumption in a dark environment. Electricity. DRAWINGS
  • FIG. 1 is a schematic view of a conventional liquid crystal display
  • FIG. 2 is a schematic structural diagram of an array substrate according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a pixel according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of another pixel according to an embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a photosensitive controller according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a driving method according to an embodiment of the present invention.
  • Embodiments of the present invention provide a display device, including: a plurality of pixels disposed on a display panel, a data driving circuit and a gate driving circuit for controlling display of a plurality of pixels, a timing controller, and a demodulator, the solution
  • the modulator is configured to output image information of each pixel to the timing controller, where the timing controller is configured to control output timings of the data driving circuit and the gate driving circuit, wherein each pixel includes a plurality of sub-pixels, and At least one of the plurality of sub-pixels is a brightening sub-pixel;
  • the display device further includes a photosensitive controller connected to the timing controller, the photosensitive controller configured to output a control signal to the timing controller according to the ambient brightness change, A control signal is used to control the display of the brightened sub-pixels.
  • the display panel is provided with a plurality of pixels, and the display panel may be a liquid crystal display panel or an organic light emitting display panel, or may be any active matrix display panel having a plurality of pixels.
  • the display panel generally includes an array substrate and a color filter substrate. Pixels are the basic unit of image display and generally include three different color sub-pixels of red (R), green (G), and blue (B).
  • Each sub-pixel is located in a grid structure formed by a plurality of intersecting gate lines and data lines on the array substrate, wherein each sub-pixel corresponds to a thin film transistor, and the thin film transistor comprises: a gate, a source and a drain
  • the gate of the thin film transistor is connected to the gate line
  • the source is connected to the data line
  • the drain is connected to the pixel electrode.
  • the control gate driving circuit and the data driving circuit can control the opening of the thin film transistor of the corresponding sub-pixel and the data signal, that is, the pixel electrode.
  • the input of the voltage in turn, can control the display brightness of each sub-pixel.
  • a color filter layer having a different color on the color filter substrate can realize color display of the display device.
  • the color filter layer may also be integrated on the array substrate, that is, after the structure of the thin film transistor, the gate line, the data line, etc. is completed on the basis of the above array substrate structure, A color filter layer is formed on the upper side of the array substrate, and the opposite substrate of the array substrate is generally a transparent substrate.
  • a structure in which a color filter layer is integrated on an array substrate is described. As shown in FIG. 2, the array substrate is integrated with a color filter layer, and the array substrate includes a plurality of pixel units.
  • the pixels on the array substrate include red (R), green (G), blue (B), and white (W) sub-pixels of four different colors, wherein the white sub-pixel is a brightening sub-pixel.
  • the number of sub-pixels included in each pixel is not limited to four, each pixel may further include sub-pixels of other colors, and the bright-activating sub-pixel may also be a transparent sub-pixel.
  • the brightening sub-pixel refers to a sub-pixel having a higher transmittance of light and a larger display luminance with respect to red, green, and blue sub-pixels.
  • the transmittance of the red sub-pixel is about 18%
  • the transmittance of the green sub-pixel is about 60%
  • the transmittance of the blue sub-pixel is about 6%
  • the transmittance of the white sub-pixel is 96%.
  • the power supply supplies a required voltage to each module, and the demodulator 100 outputs image information of sub-pixels of different colors (such as image information of RGB pixels) to the timing controller 101.
  • the timing controller 101 outputs timing signals to the output timings of the gate driving circuit 103 and the data driving circuit 102, the control gate driving circuit 103, and the data driving circuit 102, respectively.
  • the array substrate comprises a plurality of gate lines and data lines, the gate lines and the data lines are vertically distributed, forming a grid shape, each sub-pixel is formed in each grid, each sub-pixel comprises a thin film transistor, and the thin film transistor comprises a gate and a source The pole and the drain, the gate is connected to the gate line, and the source is connected to the data line.
  • the gate driving circuit 103 sequentially turns on the thin film transistors connected to each of the gate lines one by one to write the sub-pixels corresponding to the thin film transistors into the data input by the corresponding data driving circuit 102, that is, the voltage of the pixel electrodes, control the liquid crystal deflection, and display different Picture.
  • the display device includes a plurality of pixels, each pixel includes a plurality of sub-pixels, and at least one of the plurality of sub-pixels is a brightening sub-pixel.
  • the display device further includes: a light-sensitive controller connected to the timing controller, wherein the light-control controller is configured to output a control signal to the timing controller according to a change in ambient brightness, wherein the control signal is used to control the brightness-increasing sub-pixel Display, that is, the data driving circuit outputs a corresponding pixel electrode voltage to the brightening sub-pixel.
  • the display device includes four sub-pixels of red (R), green (G), blue (B), and white (W), wherein the brightening sub-pixel is a white sub-pixel as an example.
  • the demodulator inputs image information of each sub-pixel having red (R), green (G), blue (B), and white (W) to the timing controller, and the photosensitive controller changes according to the brightness of the external environment.
  • the timing controller outputs a control signal, and the timing controller controls the output timing of the gate driving circuit and the data driving circuit, except that the conventional control gate driving circuit sequentially turns on the thin film transistors on the respective gate lines and the data driving circuit outputs to the red, green and blue sub-pixels.
  • the timing controller also controls whether the data of the white sub-pixel is written according to the control signal input by the photosensitive controller, thereby controlling whether the liquid crystal corresponding to the white sub-pixel is deflected. Specifically, when the brightness of the surrounding environment is greater than a certain threshold, the liquid crystal corresponding to the white sub-pixel can be deflected to achieve light transmission, thereby improving display brightness; or, when the brightness of the surrounding environment is less than a certain threshold, the white sub-pixel can be correspondingly The liquid crystal is not deflected, that is, the sub-pixel is opaque to save power.
  • the display device is a liquid crystal display device as an example, and the description is required.
  • the display device provided by the embodiment of the present invention can also be applied to an organic light emitting display (OLED) and any other active matrix display device having a plurality of pixels.
  • OLED organic light emitting display
  • the light-sensitive controller When used in an organic light emitting display device, the light-sensitive controller outputs a control signal to the timing controller according to the ambient brightness, and the control signal is used to control whether the brightening sub-pixel (such as a white sub-pixel) therein emits light, that is, when the ambient brightness is When the threshold is higher than the preset threshold, the sub-pixel is illuminated to improve the display brightness. When the ambient brightness is lower than the preset threshold, the bright sub-pixel does not emit light, which saves energy.
  • the brightening sub-pixel such as a white sub-pixel
  • the liquid crystal display device controls the liquid crystal deflection by an electric field to change the light transmittance to display an image.
  • the liquid crystal display device is roughly classified into a vertical electric field driving type and a horizontal electric field driving type in accordance with the direction of the electric field driving the liquid crystal.
  • the vertical electric field-driven liquid crystal display device is provided with a common electrode and a pixel electrode opposite to each other on the upper and lower substrates, and a vertical electric field is formed between the common electrode and the pixel electrode to drive the liquid crystal, such as a TN (Twist Nematic) type, VA (Vertical Alignment) type liquid crystal display device.
  • the horizontal electric field-driven liquid crystal display device has a common electrode and a pixel electrode disposed on the lower substrate, and a horizontal or multi-dimensional electric field is formed between the common electrode and the pixel electrode to drive the liquid crystal, such as ADS (Advanced-Super)
  • the display device provided by the embodiment of the present invention can be applied to any of the above types of liquid crystal display devices.
  • the display device includes a plurality of pixels, each pixel includes a plurality of sub-pixels, and at least one of the plurality of sub-pixels is a brightening sub-pixel.
  • the display device further includes a light-sensitive controller, and the light-control controller can select whether the brightening sub-pixel is displayed according to the change of the brightness of the surrounding environment, so that when the ambient brightness is high, the display device displays more clearly, when the ambient brightness is not When high, the display device can save power.
  • the light-control controller is configured to output a control signal to the timing controller according to the change of the ambient brightness, where the control signal is used to control display of the brightening sub-pixel, specifically:
  • the photosensitive controller When the ambient brightness exceeds a preset threshold, the photosensitive controller outputs an enable signal to the timing controller, the turn-on signal control data driving circuit outputs a data signal to the brightening sub-pixel, and the brightening sub-pixel performs display. Increase display brightness;
  • the photosensitive controller When the ambient brightness is lower than a preset threshold, the photosensitive controller outputs a shutdown signal to the timing controller, the shutdown signal controls the data driving circuit to stop outputting a data signal to the brightening sub-pixel, the brightening sub-pixel is not Again, save power.
  • the photosensitive controller controls the timing The controller outputs an enable signal, and the timing controller controls the data driving circuit to write data to the brightening sub-pixel according to the control signal output by the photosensitive controller and the image information output by the demodulator, that is, the pixel electrode voltage of the sub-pixel is brightened, thereby realizing Displaying;
  • the photosensitive controller outputs a shutdown signal to the timing controller, and the timing controller controls the data driving according to the control signal output by the photosensitive controller and the image information output by the demodulator
  • the circuit does not write data to the brightened sub-pixels, and the brightened sub-pixels are not displayed.
  • the brightness threshold is adjustable according to the actual environment. The embodiment of the present invention is described by taking the threshold value of 300 nit as an example.
  • the demodulator is an FPGA (Field - Programmable Gate Array) demodulator.
  • each pixel on the display substrate includes four sub-pixels of different colors, and wherein the brightening sub-pixel is a white sub-pixel.
  • each pixel on the array substrate includes a red sub-pixel (R), a green sub-pixel (G), a blue sub-pixel (B), and a white sub-pixel (W), wherein, The sub-pixel (W) is a brightening sub-pixel.
  • the brightening sub-pixels may also be transparent sub-pixels or sub-pixels of other colors. For example, it may be a yellow sub-pixel or the like.
  • the brightening sub-pixel is opposite to the other three sub-pixels.
  • each pixel includes four sub-pixels of different colors, and the sub-pixels of the four different colors may be sequentially arranged, or may be, as shown in FIG. 3 and FIG. 4, the brightening sub-pixel and the other three colors.
  • the sub-pixels are set relative to each other.
  • the brightening sub-pixel is disposed opposite to the other three color sub-pixels, wherein the long side of the brightening sub-pixel corresponds to the short side of the three brightening sub-pixels, and the increasing
  • the bright sub-pixels may be located at any position of the top, bottom, left, and right of the three sub-pixels, and are determined by the arrangement of the three sub-pixels.
  • the three sub-pixels are vertically arranged, and the brightening sub-pixels are horizontally disposed above or below the three sub-pixels, so that each of the sub-pixels can be brightened.
  • the brightness of the sub-pixels of the color is better.
  • the embodiment of the present invention further provides a light-sensitive controller for driving control of a display device, which can output a control signal to the timing controller according to changes in ambient brightness.
  • the photosensitive controller includes: a voltage source, a non-directional input unit 11, an inverse input unit 12, a comparison unit 13, and a control unit 14;
  • the same direction input unit 11 is configured to output a comparison voltage, comprising: a first input terminal in the same direction, connected to the positive pole of the voltage source; a second input terminal in the same direction, connected to the negative pole of the voltage source; and a non-inverting output terminal;
  • the unit 12 is configured to output a reference voltage, comprising: a reverse first input end connected to the same first input end; a reverse second input end connected to the same second input end; and a reverse output end; 13 is used to compare the comparison voltage and the reference voltage, and is lightly controlled according to the comparison result.
  • the conduction state of the controller includes a first input end of the comparison unit and is connected to the first output end of the same direction; a second input end of the comparison unit is connected to the reverse output end; the first output end of the comparison unit is opposite to the second output end The input ends are connected; the second output end of the comparison unit;
  • the control unit 14 is configured to output a control signal according to the conduction state of the circuit, comprising: a first input end of the control unit connected to the reverse first input end; a second input end of the control unit connected to the second output end of the comparison unit; Output, used to output control signals.
  • the voltage source is used to provide a fixed voltage
  • the same input unit is used to generate a comparison voltage
  • the reverse input unit is configured to generate a reference voltage
  • the comparison voltage and the reference voltage are compared by the comparison unit, if When the comparison voltage is greater than the reference voltage, the comparison unit turns on the whole circuit, and the control unit outputs a high level, and the control signal output by the photosensitive controller to the timing controller is an open signal of the corresponding brightening sub-pixel.
  • the data driving circuit writes data to the brightening sub-pixel; if the comparison voltage is less than the reference voltage, the comparing unit disconnects the entire circuit, and the control unit outputs a low level, then the photosensitive controller controls the timing
  • the control signal output by the device is the off signal of the corresponding brightening sub-pixel, that is, the data driving circuit does not write data to the brightening sub-pixel.
  • the magnitude of the comparison voltage is related to the brightness of the surrounding environment, and the reference voltage can be a fixed threshold for comparison with the comparison voltage.
  • the same-direction input unit 11 includes: a photoresistor R L , a first resistor, and a second resistor R 2 , where
  • the photoresistor R L can change its own resistance according to the bright change of the surrounding environment, and the first end thereof is the same first input end of the same direction input unit;
  • the first end of the second resistor R 2 is connected to the second end of the photoresistor R L , and the second end of the second resistor R 2 is the same second input end of the same input unit;
  • the first end of the first resistor is connected to the second end of the photoresistor R L , and the second end of the first resistor is a non-directional output end of the same input unit.
  • the photoresistor can change its own resistance according to the brightness of the surrounding environment, change the magnitude of the current in the same input unit, and thereby change the magnitude of the output voltage at the same output.
  • the photoresistor when the brightness of the surrounding environment is larger, the smaller the resistance of the photoresistor is, the larger the comparison voltage outputted by the corresponding non-directional output is; the smaller the brightness of the surrounding environment, the resistance of the photoresistor The larger the value, the more the comparison voltage is output from the corresponding output of the same direction.
  • the reverse input unit 12 includes: a third resistor R 3 , a fifth resistor R 5 , and a fourth resistor R 4 , where The first end of the third resistor R 3 is an inverted first input end of the reverse input unit;
  • the first end of the fourth resistor R 4 is connected to the second end of the third resistor R 3 , and the second end of the fourth resistor R 4 is the reverse second input end of the reverse input unit;
  • the first end of the fifth resistor R 5 is connected to the second end of the third resistor R 3 , and the second end of the fifth resistor R 5 is an inverted output end of the inverting input unit.
  • the comparing unit 13 includes: a comparator U, a sixth resistor R 6 , a seventh resistor R 7 , an eighth resistor R 8 , and a transistor T;
  • the comparator U includes a same end, an opposite end, and an output end, and the same end is connected to the output end of the same input unit, and the opposite end is connected to the output end of the reverse input unit;
  • the first end of the seventh resistor R 7 is connected to the output end of the comparator U;
  • a first end of the sixth resistor R 6 is connected to the opposite end of the comparator U, and a second end of the sixth resistor R 6 is connected to the second end of the seventh resistor R 7 ;
  • the first end of the eighth resistor R 8 is connected to the second end of the seventh resistor R 7 ;
  • the transistor T includes a base B, an emitter E and a collector C, the base B of which is connected to the second end of the eighth resistor R 8 , the emitter E is the first output end of the comparison unit, and the collector C is the comparison unit Two outputs.
  • the opposite end of the comparator is connected to the output end of the same input unit, the opposite end of the comparator is connected to the output end of the reverse input unit, and the comparator is used to input the same input end.
  • the comparison voltage is compared with a reference voltage input to the inverting input terminal, and the triode is turned on if the comparison voltage is greater than the reference voltage; and the triode is disconnected if the comparison voltage is less than the reference voltage.
  • the switching tube is a triode.
  • two parallel diodes may be used instead, or any other device capable of realizing the function of the switching tube, which is not limited by the present invention.
  • control unit 14 includes: a ninth resistor R 9 and a relay K, wherein the first end of the ninth resistor R 9 is a first input end of the control unit, and the second end of the ninth resistor R 9 is controlled a second input of the unit;
  • the relay K includes a first input end, a second input end and an output end, the first input end and the first end of the ninth resistor R 9 and the same direction first input end and the reverse input unit of the same input unit
  • the opposite first input terminals are connected, and the second input end is connected to the second end of the ninth resistor R 9 and the second output end of the comparison unit, and the output end thereof is the output end of the control unit.
  • the triode of the comparison unit is turned on, and the output end of the relay outputs a high level;
  • the triode of the comparison unit is turned off, and the output of the relay outputs a low level.
  • the voltage of the voltage source is between 2V and 8V.
  • the resistances of the first resistor, the third resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor, and the ninth resistor are between 1 ⁇ and 1000 ⁇ . It is to be understood that the above-mentioned resistor is a fixed resistor. In practice, the resistor may also be an adjustable resistor, which is not limited in the present invention.
  • the resistance of the second resistor and the fourth resistor is between 1 ⁇ and 30 ⁇ . It can be understood that the figure is illustrated by taking the second resistor and the fourth resistor as sliding resistors. In practice, the second resistor and the fourth resistor may also be fixed resistors, and the reference voltage is selected. It cannot be adjusted arbitrarily, so the second resistor and the fourth resistor are preferably adjustable resistors such as a sliding resistor.
  • each resistor refers to the upper end or the left end of each resistor shown in the figure
  • the second end of each resistor refers to each resistor shown in the figure. The lower or right end.
  • the preset threshold of the ambient brightness may be adjusted according to requirements, such as higher requirements on display quality in a brighter environment, and the preset threshold may be lower, such as in a darker environment. There is a higher requirement for power saving in the middle, and the preset threshold can be relatively high, and these inventions are not limited. Specifically, it can be realized by adjusting the value of the reference voltage output by the inverting input unit.
  • the embodiment of the present invention further provides a driving method of a display device using the above-mentioned photosensitive controller.
  • the photosensitive controller 105 outputs a control signal to the timing controller 101 according to a change in brightness of the surrounding environment, and the control signal And configured to control an output of the data driving circuit to the brightening sub-pixel, thereby controlling whether the corresponding brightening sub-pixel is displayed;
  • the demodulator 100 is connected to the timing controller 101, and outputs each sub-pixel including the brightening sub-pixel to the timing controller 101.
  • Image Information The timing controller 101 controls the display of each sub-pixel based on the image information of the demodulator 100 and the control signal of the light-sensitive controller 105.
  • the photosensitive controller comprises a photoresistor, and the resistance of the photoresistor decreases as the brightness of the surrounding environment increases, and increases with the decrease of the brightness of the surrounding environment.
  • the light-control controller is configured to output a control signal to the timing controller according to the change of the ambient brightness, where the control signal is used to control the data driving circuit to output a data signal to the brightening sub-pixel, specifically: when the ambient brightness exceeds a preset threshold, The photosensitive controller outputs a high level to the timing controller, and the timing controller outputs an on signal, and the on signal controls the data driving circuit to brighten the light
  • the sub-pixel outputs a data signal, so that the brightening sub-pixel is displayed; or, when the ambient brightness is lower than a preset threshold, the photosensitive controller outputs a low level to the timing controller, and the timing controller outputs a shutdown signal,
  • the off signal controls the data driving circuit to stop outputting a data signal to the brightening sub-pixel such that the brightening sub-pixel is not displayed.
  • the power supply supplies a required voltage to each module.
  • the photoresistor can automatically adjust the resistance according to the brightness of the surrounding environment, and when the brightness of the surrounding environment is greater than a certain threshold, for example, may be greater than 300 nit, the photoresistor The resistance value is less than a certain value, so that the voltage of the output terminal of the same input unit is greater than the voltage outputted by the output end of the reverse input unit, the transistor is turned on, the relay outputs a high level, the timing controller outputs an open signal, and the data driving circuit is controlled.
  • the brightness of the display device is enhanced, and the display is more clearly visible in a high-brightness environment; when the brightness of the surrounding environment is less than a certain threshold, for example, less than 300 nit, the photoresistor is The resistance value is greater than a certain value, so that the voltage of the output terminal of the same input unit is smaller than the voltage outputted by the output end of the reverse input unit, the triode is disconnected, the relay outputs a low level, and the timing controller outputs a shutdown signal to control the data driving circuit. Do not write data to brightened subpixels Brightening sub-pixel display is not implemented, so as to save power consumption.
  • a certain threshold for example, less than 300 nit

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Abstract

提供一种用于显示装置驱动控制的光敏控制器(105)和显示装置。所述光敏控制器(105)包括:电压源、同向输入单元(11)、反向输入单元(12)、比较单元(13)以及控制单元(14)。所述显示装置包括:设置于显示面板(104)上的多个像素、用于控制多个像素显示的数据驱动电路(102)和栅驱动电路(103)、时序控制器(101)以及解调器(100),所述解调器(100)用于向所述时序控制器(101)输出各个像素的图像信息,所述时序控制器(101)用于控制所述数据驱动电路(102)和栅驱动电路(103)的输出时序,所述每个像素包括多个子像素,且所述多个子像素中至少一个为增亮子像素;所述显示装置还包括与所述时序控制器(101)相连的光敏控制器(105),用于根据环境亮度变化向时序控制器(101)输出控制信号,所述控制信号用于控制所述增亮子像素的显示。

Description

用于显示装置驱动控制的光敏控制器和显示装置 技术领域
本发明涉及显示技术领域, 尤其涉及一种用于显示装置驱动控制的光敏 控制器和显示装置。 背景技术
液晶显示器, 或称 LCD ( Liquid Crystal Display ), 其功耗 4艮低, 因此倍 受工程师青睐, 适用于各种电子设备。 它的主要原理是利用电场控制液晶调 节光透性以显示图像, 可应用于电脑、 手机等电子产品中。
具体的, 如图 1所示, 现有的液晶显示器包括: 解调器 100、 时序控制 器 101、 数据驱动电路 102、 栅驱动电路 103、 显示面板 104。 其中, 显示面 板 104包括: 多条栅线和多条数据线, 所述栅线和数据线交叉设置, 形成红、 绿、蓝三种不同颜色的多个子像素。其中每一子像素对应一个薄膜晶体管 30, 包括: 栅极、 源极和漏极, 其中所述栅极和栅线电连接, 源极和数据线电连 接, 漏极和子像素的像素电极电连接。 数据驱动电路 102控制数据线 Gl-Gn 的信号输出, 栅驱动电路 103控制栅线 Sl-Sn的信号输出。 通常, 显示器正 常工作时, 电源给各个模块提供所需电压, 解调器 100向时序控制器 101输 出红、 绿、 蓝三种不同颜色的子像素的图像信息, 时序控制器 101控制数据 驱动电路 102以及栅驱动电路 103的输出时序, 栅驱动电路 103依次逐一打 开每条栅线上连接的薄膜晶体管以使得数据驱动电路 102的数据信号输入对 应的子像素, 使得该子像素区域的液晶偏转, 显示不同画面。
但由于人眼对光线比较敏感, 在户外光线比较亮的地方, 显示屏亮度不 够, 则图像显示不清, 视觉效果就会艮差。 发明内容
本发明的实施例提供一种用于显示装置驱动控制的光敏控制器和显示装 置, 所述显示装置可以根据周围环境的亮度变化改变屏幕显示亮度。
为达到上述目的, 本发明的实施例采用如下技术方案:
本发明实施例提供一种用于显示装置驱动控制的光敏控制器, 包括: 电 压源、 同向输入单元、 反向输入单元、 比较单元以及控制单元; 其中, 同向输入单元包括: 同向第一输入端, 与电压源的正极相连; 同向第二 输入端, 与电压源的负极相连; 以及同向输出端;
反向输入单元包括: 反向第一输入端, 与同向第一输入端相连; 反向第 二输入端, 与同向第二输入端相连; 以及反向输出端;
比较单元包括: 比较单元第一输入端, 与同向输出端相连; 比较单元第 二输入端, 与反向输出端相连; 比较单元第一输出端, 与反向第二输入端相 连; 比较单元第二输出端;
控制单元包括: 控制单元第一输入端, 与反向第一输入端相连; 控制单 元第二输入端, 与比较单元第二输出端相连; 控制单元输出端, 用于输出控 制信号, 所述控制信号用于根据环境亮度变化控制显示装置的驱动电路。
具体地, 所述同向输入单元包括: 光敏电阻、 第二电阻以及第一电阻, 其中,
光敏电阻的第一端为同向输入单元的同向第一输入端;
第二电阻的第一端与光敏电阻的第二端相连, 第二电阻的第二端为同向 输入单元的同向第二输入端;
第一电阻的第一端与光敏电阻的第二端相连, 第一电阻的第二端为同向 输入单元的同向输出端。
具体地, 所述反向输入单元包括:
第三电阻、 第五电阻和第四电阻, 其中,
第三电阻的第一端为反向输入单元的反向第一输入端;
第四电阻的第一端与第三电阻的第二端相连, 第四电阻的第二端为反向 输入单元的反向第二输入端;
第五电阻的第一端与第三电阻第二端相连, 第五电阻的第二端为反向输 入单元的反向输出端。
具体地, 所述比较单元包括: 比较器、 第六电阻、 第七电阻、 第八电阻 以及三极管; 其中,
比较器, 包括同向端、 反向端以及输出端, 其同向端与同向输入单元的 输出端相连, 其反向端与反向输入单元的输出端相连;
第七电阻的第一端与比较器的输出端相连;
第六电阻的第一端与比较器的反向端相连, 第六电阻的第二端与第七电 阻的第二端相连; 第八电阻的第一端与第七电阻的第二端相连;
三极管, 包括基极、 发射极和集电极, 所述三极管的基极与第八电阻的 第二端相连, 发射极为比较单元第一输出端, 集电极为比较单元第二输出端。
具体的, 所述控制单元包括: 第九电阻和继电器, 其中,
第九电阻的第一端为控制单元第一输入端, 第九电阻的第二端为控制单 元第二输入端;
继电器, 包括第一输入端、 第二输入端和输出端, 其第一输入端与第九 电阻的第一端以及同向输入单元的同向第一输入端、 反向输入单元的反向第 一输入端相连, 其第二输入端与第九电阻的第二端以及比较单元第二输出端 相连, 其输出端为控制单元输出端。
具体地, 所述电压源的电压在 2V-8V之间。
具体地, 所述第一电阻、 第三电阻、 第五电阻、 第六电阻、 第七电阻、 第八电阻和第九电阻的阻值在 1 Ω - 1000 Ω之间。
具体地, 所述第二电阻和第四电阻的阻值在 1 Ω -30Ω之间。
本发明实施例还提供一种显示装置, 包括: 设置于显示面板上的多个像 素、 用于控制多个像素显示的数据驱动电路和栅驱动电路、 时序控制器以及 解调器, 所述解调器用于向所述时序控制器输出各个像素的图像信息, 所述 时序控制器用于控制所述数据驱动电路和栅驱动电路的输出时序, 其中, 所述每个像素包括多个子像素, 且所述多个子像素中至少一个为增亮子 像素;
所述显示装置还包括与所述时序控制器相连的光敏控制器, 所述光敏控 制器采用上述任一项所述的光敏控制器, 所述光敏控制器用于根据环境亮度 变化向时序控制器输出控制信号, 所述控制信号用于控制所述增亮子像素的 显示。
进一步地, 所述光敏控制器用于根据环境亮度变化向时序控制器输出控 制信号, 所述控制信号用于控制所述增亮子像素的显示, 具体为:
当环境亮度超过预设阈值时, 所述光敏控制器向所述时序控制器输出开 启信号, 所述开启信号控制数据驱动电路向所述增亮子像素输出数据信号, 使得所述增亮子像素显示;
当环境亮度低于预设阈值时, 所述光敏控制器向所述时序控制器输出关 闭信号, 所述关闭信号控制数据驱动电路停止向所述增亮子像素输出数据信 号, 使得所述增亮子像素不显示。
进一步地, 所述每个像素包括四个不同颜色的子像素, 所述增亮子像素 为白色子像素。
进一步地, 所述增亮子像素与其他三个子像素相对设置。
本发明实施例提供了一种用于显示装置驱动控制的光敏控制器和显示装 置, 由于显示装置增加了增亮子像素和光敏控制器, 使得可以随着环境亮度 的变化, 选择增亮子像素是否显示, 以调节显示亮度。 当周围环境亮度大于 预设阈值时, 光敏控制器输出控制信号控制数据驱动电路向增亮子像素输出 数据信号进行显示, 提高显示亮度, 使得在环境亮度较高时, 显示装置显示 更为清楚; 当环境亮度低于预设阈值时, 光敏控制器输出控制信号控制数据 驱动电路停止向增亮子像素输出数据信号, 即所述增亮子像素不显示, 实现 在较暗的环境中, 显示装置能够节省耗电量。 附图说明
图 1为现有的液晶显示器示意图;
图 2为本发明实施例提供的一种阵列基板结构示意图;
图 3为本发明实施例提供的一种像素结构示意图;
图 4为本发明实施例提供的另一种像素结构示意图;
图 5为本发明实施例提供的一种光敏控制器示意图; 以及
图 6为本发明实施例提供的一种驱动方法示意图。
附图标记:
100-解调器; 101-时序控制器; 102-数据驱动电路; 103-栅驱动电路; 104- 显示面板; 105-光敏控制器; 30-薄膜晶体管; R-红色子像素; G-绿色子像素; B-蓝色子像素; W-白色子像素; 11-同向输入单元; 12-反向输入单元; 13-比 较单元; 14-控制单元; RL-光敏电阻; R1-第一电阻; R2-第二电阻; R3-第三 电阻; R4-第四电阻; R5-第五电阻; R6-第六电阻; R7-第七电阻; R8-第八电 阻; R9-第九电阻; T-三极管; K-继电器。 具体实施方式
下面将结合本发明实施例中的附图, 对本发明实施例中的技术方案进行 清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明一部分实施例, 而 不是全部的实施例。
本发明实施例提供了一种显示装置, 包括: 设置于显示面板上的多个像 素、 用于控制多个像素显示的数据驱动电路和栅驱动电路、 时序控制器以及 解调器, 所述解调器用于向所述时序控制器输出各个像素的图像信息, 所述 时序控制器用于控制所述数据驱动电路和栅驱动电路的输出时序, 其中, 所 述每个像素包括多个子像素, 且所述多个子像素中至少一个为增亮子像素; 所述显示装置还包括与所述时序控制器相连的光敏控制器, 所述光敏控 制器用于根据环境亮度变化向时序控制器输出控制信号, 所述控制信号用于 控制所述增亮子像素的显示。
需要说明的是, 所述显示面板上设置有多个像素, 显示面板可以为液晶 显示面板也可以为有机发光显示面板, 或者可以为其他任何具有多个像素的 主动矩阵式显示面板。 显示面板一般包括阵列基板和彩膜基板。 像素是图像 显示的基本单位, 一般包括红(R )、 绿(G )、 蓝 (B )三种不同颜色的子像 素。 各个子像素位于阵列基板上的多条交叉设置的栅线和数据线形成的网格 结构中, 其中, 每一子像素对应一个薄膜晶体管, 所述薄膜晶体管包括: 栅 极、 源极和漏极, 所述薄膜晶体管的栅极和栅线连接, 源极和数据线连接, 漏极和像素电极连接。 又由于, 栅驱动电路控制栅线信号的输出, 数据驱动 电路控制数据线信号的输出, 则通过控制栅驱动电路和数据驱动电路可以控 制对应的子像素的薄膜晶体管的开启以及数据信号即像素电极电压的输入, 进而可以控制各个子像素的显示亮度。与阵列基板上各个子像素——对应的, 彩膜基板上具有不同颜色的彩色滤光层, 可以实现显示装置的彩色显示。
在其他一些显示面板的结构中, 所述彩色滤光层也可以集成于阵列基板 上, 即在上述的阵列基板结构的基础上, 在薄膜晶体管、 栅线、 数据线等结 构制作完成后, 在其上方制作彩色滤光层, 则该阵列基板的对向基板一般为 透明基板。 具体的, 本发明实施例以彩色滤光层集成于阵列基板的结构进行 说明, 如图 2所示, 为集成有彩色滤光层的阵列基板, 所述阵列基板上包括 多个像素单元。所述阵列基板上的像素包括红(R )、绿(G )、蓝(B )、 白(W ) 四种不同颜色的子像素, 其中, 所述白色子像素为增亮子像素。 当然, 每个 像素包含的子像素数目不限于四种, 各像素还可以包括其他颜色的子像素, 且所述增亮子像素还可以是透明子像素。 需要说明的是, 所述增亮子像素是 指相对于红、 绿、 蓝子像素来说, 光的透过率更高, 显示亮度更大的子像素。 例如红色子像素的透过率约为 18%, 绿色子像素的透过率约为 60%, 蓝色子 像素的透过率约为 6%, 而白色子像素的透过率能达 96%以上。本发明实施例 中显示装置的其他结构与现有技术相同, 此处不再赘述。
现有技术的液晶显示装置中, 如图 1所示, 电源给各个模块提供所需电 压,解调器 100向时序控制器 101输出不同颜色的子像素的图像信息(如 RGB 像素的图像信息 ),时序控制器 101输出时序信号分别给栅驱动电路 103以及 数据驱动电路 102, 控制栅驱动电路 103以及数据驱动电路 102的输出时序。 阵列基板上包含多条栅线和数据线, 栅线和数据线垂直分布, 形成网格状, 每个网格内形成一个子像素, 每个子像素包含一个薄膜晶体管, 薄膜晶体管 包含栅极、 源极和漏极, 栅极与栅线连接, 源极和数据线连接。 栅驱动电路 103依次逐一打开每条栅线上连接的薄膜晶体管以使得与该薄膜晶体管对应 的子像素写入对应的数据驱动电路 102输入的数据, 即像素电极的电压, 控 制液晶偏转, 显示不同画面。
本发明实施例中, 所述显示装置包括多个像素, 每个像素包括多个子像 素, 所述多个子像素中至少一个为增亮子像素。 所述显示装置还包括: 与所 述时序控制器相连的光敏控制器, 所述光敏控制器用于根据环境亮度变化向 时序控制器输出控制信号, 所述控制信号用于控制所述增亮子像素的显示, 即数据驱动电路向所述增亮子像素输出对应的像素电极电压。
具体地, 以所述显示装置包含红(R )、 绿(G )、 蓝(B )、 白 (W )四种 子像素, 其中的增亮子像素为白色子像素为例进行说明。 相应地, 所述解调 器向时序控制器输入有红(R )、 绿(G )、 蓝(B )、 白 (W )各子像素的图像 信息, 光敏控制器根据外界环境亮度的变化向时序控制器输出控制信号, 时 序控制器控制栅驱动电路和数据驱动电路的输出时序, 除了常规的控制栅驱 动电路逐次打开各条栅线上的薄膜晶体管以及数据驱动电路向红绿蓝子像素 输出像素电极电压数据以外, 时序控制器还要根据光敏控制器输入的控制信 号控制白色子像素的数据是否写入, 从而控制白色子像素对应的液晶是否偏 转。 具体地, 当周围环境的亮度大于一定阈值时, 可以使得白色子像素对应 的液晶偏转, 实现透光, 进而提高显示亮度; 或者, 当周围环境的亮度小于 一定阈值时, 可以使得白色子像素对应的液晶不偏转, 即该子像素不透光, 以节省耗电量。
上述实施例以所述显示装置为液晶显示装置为例进行说明, 需要说明的 是, 本发明实施例提供的显示装置还可以适用于有机发光显示装置(OLED, Organic Light Emitting Display ) 以及任何其他具有多个像素的主动矩阵式显 示装置。 当用于有机发光显示装置时, 所述光敏控制器根据环境亮度向时序 控制器输出控制信号, 所述控制信号用于控制其中的增亮子像素 (如白色子 像素)是否发光, 即当环境亮度高于预设阈值时, 增亮子像素发光, 提高显 示亮度, 当环境亮度低于预设阈值时, 增亮子像素不发光, 节省能耗。
当所述显示装置为液晶显示装置时, 液晶显示装置是利用电场控制液晶 偏转改变光透性以显示图像。 根据驱动液晶的电场方向, 将液晶显示装置大 致分为垂直电场驱动型和水平电场驱动型。 垂直电场驱动型液晶显示装置在 上下基板上彼此相对设置公共电极和像素电极, 在所述公共电极和像素电极 之间形成垂直的电场以驱动液晶, 如 TN ( Twist Nematic, 扭曲向列)型、 VA ( Vertical Alignment, 多畴垂直取向)型液晶显示装置。 水平电场驱动型液晶 显示装置在下基板上设置公共电极和像素电极, 在所述公共电极和像素电极 之间形成水平或者多维的电场以驱动液晶, 如 ADS ( Advanced-Super
Dimensional Switching, 高级超维场开关)型、 IPS ( In Plane Switch, 横向电 场效应)型液晶显示装置。 本发明实施例提供的显示装置可以适用于上述任 一种类型的液晶显示装置。
本发明实施例提供的一种显示装置, 所述显示装置包括多个像素, 每个 像素包括多个子像素, 且所述多个子像素中至少一个为增亮子像素。 且所述 显示装置还包括光敏控制器,所述光敏控制器可以根据周围环境亮度的变化, 选择增亮子像素是否显示, 使得在环境亮度较高时, 显示装置显示更为清楚, 当环境亮度不高时, 显示装置能够节省耗电量。
可选地, 所述光敏控制器用于根据环境亮度变化向时序控制器输出控制 信号, 所述控制信号用于控制所述增亮子像素的显示, 具体为:
当环境亮度超过预设阈值时, 所述光敏控制器向所述时序控制器输出开 启信号, 所述开启信号控制数据驱动电路向所述增亮子像素输出数据信号, 所述增亮子像素进行显示, 提高显示亮度;
当环境亮度低于预设阈值时, 所述光敏控制器向所述时序控制器输出关 闭信号, 所述关闭信号控制数据驱动电路停止向所述增亮子像素输出数据信 号, 所述增亮子像素不再显示, 节省耗电量。
示例地, 当周围环境的亮度大于 300nit, 所述光敏控制器向所述时序控 制器输出开启信号, 所述时序控制器根据光敏控制器输出的控制信号以及解 调器输出的图像信息, 控制数据驱动电路向增亮子像素写入数据, 即增亮子 像素的像素电极电压, 实现显示; 当周围环境的亮度小于 300nit, 所述光敏 控制器向所述时序控制器输出关闭信号, 所述时序控制器根据光敏控制器输 出的控制信号以及解调器输出的图像信息, 控制数据驱动电路不向增亮子像 素写入数据, 增亮子像素不显示。 需要说明的是, 所述亮度阈值是可以根据 实际环境可调节的, 本发明实施例以所述阈值为 300nit为例进行说明。
可选地, 所述解调器为 FPGA ( Field - Programmable Gate Array, 现场可 编程门阵列)解调器。
可选地, 所述显示基板上的每个像素均包括四种不同颜色的子像素, 且 其中所述增亮子像素为白色子像素。 具体的, 如图 2所示, 阵列基板上的每 一像素均包括红色子像素 (R )、 绿色子像素 (G )、 蓝色子像素 (B ) 以及白 色子像素(W ), 其中, 白色子像素(W )为增亮子像素。 当然所述增亮子像 素还可以是透明子像素或者其他颜色的子像素。例如还可以是黄色子像素等。
可选地, 所述增亮子像素与其他三个子像素相对。 具体地, 每一像素包 括四种不同颜色的子像素, 所述四个不同颜色的子像素可以依次排列, 还可 以是如图 3、 图 4所示, 所述增亮子像素与其他三个颜色的子像素相对设置。 以所述子像素形状为矩形为例, 所述增亮子像素与其他三个颜色的子像素相 对设置是指, 所述增亮子像素的长边对应三个增亮子像素的短边, 所述增亮 子像素可以位于三个子像素的上下左右任何位置, 由三个子像素的排列方式 决定, 优选三个子像素竖直排列, 增亮子像素水平设置于三个子像素的上方 或者下方, 这样可以增亮每一种颜色的子像素的亮度, 显示效果更佳。
具体地,本发明实施例还提供一种用于显示装置驱动控制的光敏控制器, 可以根据环境亮度变化向时序控制器输出控制信号。
可选地, 如图 5所示, 所述光敏控制器包括: 电压源、 同向输入单元 11、 反向输入单元 12、 比较单元 13以及控制单元 14; 其中,
同向输入单元 11用于输出比较电压, 包括: 同向第一输入端, 与电压源 的正极相连; 同向第二输入端, 与电压源的负极相连; 以及同向输出端; 反向输入单元 12用于输出参考电压, 包括: 反向第一输入端, 与同向第 一输入端相连; 反向第二输入端, 与同向第二输入端相连; 以及反向输出端; 比较单元 13用于对比较电压和参考电压做比较,并根据比较结果光敏控 制器的导通状态, 包括比较单元第一输入端, 与同向第一输出端相连; 比较 单元第二输入端, 与反向输出端相连; 比较单元第一输出端, 与反向第二输 入端相连; 比较单元第二输出端;
控制单元 14用于根据电路的导通状态输出控制信号, 包括控制单元第一 输入端, 与反向第一输入端相连; 控制单元第二输入端, 与比较单元第二输 出端相连; 控制单元输出端, 用于输出控制信号。
其中, 电压源用于提供一固定电压, 同向输入单元用于产生一个比较电 压, 反向输入单元用于产生一参考电压, 所述比较电压和参考电压通过所述 比较单元进行比较之后, 若所述比较电压大于所述参考电压, 则所述比较单 元将整个电路导通, 控制单元输出一高电平, 则光敏控制器向时序控制器输 出的控制信号为对应的增亮子像素的开启信号, 即数据驱动电路向增亮子像 素写入数据; 若所述比较电压小于所述参考电压, 则所述比较单元将整个电 路断开, 控制单元输出一低电平, 则光敏控制器向时序控制器输出的控制信 号为对应的增亮子像素的关闭信号, 即数据驱动电路不向增亮子像素写入数 据。 其中, 比较电压的大小与周围环境的亮度有关, 参考电压可以是一个固 定的阈值, 用于与比较电压做比较。
可选地, 如图 5所示, 所述同向输入单元 11包括: 光敏电阻 RL、 第一 电阻 以及第二电阻 R2, 其中,
光敏电阻 RL可以根据周围环境的明亮变化改变自身电阻,其第一端为同 向输入单元的同向第一输入端;
第二电阻 R2的第一端与光敏电阻 RL的第二端相连, 第二电阻 R2的第二 端为同向输入单元的同向第二输入端;
第一电阻 的第一端与光敏电阻 RL的第二端相连, 第一电阻 的第二 端为同向输入单元的同向输出端。
具体地, 光敏电阻可以根据周围环境的亮度改变自身的阻值, 改变同向 输入单元的电流的大小, 进而改变同向输出端的输出电压的大小。 且当周围 环境的亮度越大, 则所述光敏电阻的阻值越小, 则相应的同向输出端输出的 比较电压就越大; 当周围环境的亮度越小, 在所述光敏电阻的阻值就越大, 则相应的同向输出端输出的比较电压就越 d、。
可选地, 所述反向输入单元 12包括: 第三电阻 R3、 第五电阻 R5和第四 电阻 R4, 其中, 第三电阻 R3的第一端为反向输入单元的反向第一输入端;
第四电阻 R4的第一端与第三电阻 R3的第二端相连, 第四电阻 R4的第二 端为反向输入单元的反向第二输入端;
第五电阻 R5的第一端与第三电阻 R3第二端相连, 第五电阻 R5的第二端 为反向输入单元的反向输出端。
可选地, 所述比较单元 13包括: 比较器 U、 第六电阻 R6、 第七电阻 R7、 第八电阻 R8以及三极管 T; 其中,
比较器 U, 包括同向端、 反向端以及输出端, 其同向端与同向输入单元 的输出端相连, 其反向端与反向输入单元的输出端相连;
第七电阻 R7的第一端与比较器 U的输出端相连;
第六电阻 R6的第一端与比较器 U的反向端相连, 第六电阻 R6的第二端 与第七电阻 R7的第二端相连;
第八电阻 R8的第一端与第七电阻 R7的第二端相连;
三极管 T, 包括基极 B、 发射极 E和集电极 C, 其基极 B与第八电阻 R8 的第二端相连, 发射极 E为比较单元第一输出端, 集电极 C为比较单元第二 输出端。
具体地, 所述比较器的同向端与同向输入单元的输出端相连, 所述比较 器的反向端与反向输入单元的输出端相连, 所述比较器用于将同向输入端输 入的比较电压和反向输入端输入的参考电压做比较, 若所述比较电压大于参 考电压则所述三极管导通;若所述比较电压小于参考电压则所述三极管断开。
需要说明的是, 图中示意的比较单元中开关管为三极管, 实际中, 也可 以应用两个并联的二极管代替, 或者其他任何能实现开关管作用的器件, 本 发明不做限制。
可选地, 所述控制单元 14包括: 第九电阻 R9和继电器 K, 其中, 第九电阻 R9的第一端为控制单元第一输入端, 第九电阻 R9的第二端为 控制单元第二输入端;
继电器 K, 包括第一输入端、 第二输入端和一个输出端, 其第一输入端 与第九电阻 R9的第一端以及同向输入单元的同向第一输入端、反向输入单元 的反向第一输入端均相连, 其第二输入端与第九电阻 R9的第二端以及比较单 元第二输出端相连, 其输出端为控制单元输出端。 具体的, 当所述比较电压 大于参考电压, 则比较单元的三极管导通, 继电器的输出端输出一高电平; 当所述比较电压小于参考电压, 则比较单元的三极管断开, 继电器输出端输 出一低电平。
可选地, 所述电压源的电压在 2V-8V之间。
可选地, 如图中所示, 所述第一电阻、 第三电阻、 第五电阻、 第六电阻、 第七电阻、 第八电阻和第九电阻的阻值在 1 Ω-1000Ω之间。 可以理解的是, 图中是以上述电阻为固定电阻进行示意, 实际中, 上述电阻也可以为可调电 阻, 本发明不做限定。
可选地, 所述第二电阻和所述第四电阻的阻值在 1 Ω -30Ω之间。 可以理 解的是, 图中是以所述第二电阻和所述第四电阻为滑动电阻为例进行示意, 实际中, 第二电阻和第四电阻也可以为固定电阻, 则对于参考电压的选取不 能随意调节, 因此第二电阻和第四电阻优选为可调电阻, 如滑动电阻。
需要说明的是, 为了方便描述, 所述各个电阻的第一端指的是图中所示 的各电阻的上端或者左端, 所述各个电阻的第二端指的是图中所示的各电阻 的下端或者右端。
需要说明的是, 所述环境亮度的预设阈值可以根据需要进行调节, 如对 在较亮的环境中的显示品质有更高的要求, 预设阈值可以较低, 如对在较暗 的环境中省电有更高的要求, 预设阈值可以相对高一些, 这些本发明均不做 限制。 具体地, 可以通过调节反向输入单元输出的参考电压的值来实现。
本发明实施例还提供了一种应用上述光敏控制器的显示装置的驱动方 法,如图 6所示,光敏控制器 105根据周围环境的亮度变化向时序控制器 101 输出控制信号, 所述控制信号用于控制数据驱动电路向所述增亮子像素的输 出, 进而控制对应增亮子像素是否显示; 解调器 100与时序控制器 101相连, 向时序控制器 101输出包括增亮子像素的各子像素的图像信息; 时序控制器 101根据解调器 100的图像信息以及光敏控制器 105的控制信号, 控制各子 像素的显示。
其中, 光敏控制器中包含光敏电阻, 所述光敏电阻的阻值随周围环境的 亮度的增大而减小, 随周围环境的亮度的减小而增大。
所述光敏控制器用于根据环境亮度变化向时序控制器输出控制信号, 所 述控制信号用于控制数据驱动电路向所述增亮子像素输出数据信号,具体为: 当环境亮度超过预设阈值时, 所述光敏控制器向时序控制器输出高电平, 则 所述时序控制器输出开启信号, 所述开启信号控制数据驱动电路向所述增亮 子像素输出数据信号, 使得所述增亮子像素显示; 或者, 当环境亮度低于预 设阈值时, 所述光敏控制器向时序控制器输出低电平, 则所述时序控制器输 出关闭信号, 所述关闭信号控制数据驱动电路停止向所述增亮子像素输出数 据信号, 使得所述增亮子像素不显示。
具体地, 电源给各个模块提供所需电压, 光敏控制器中, 光敏电阻可以 根据周围环境的亮度自动调节阻值, 且当周围环境的亮度大于一定阈值, 例 如可以是大于 300nit, 则光敏电阻的阻值小于一定值, 使得同向输入单元输 出端的电压大于反向输入单元输出端输出的电压, 则三极管导通, 继电器输 出一高电平, 所述时序控制器输出开启信号, 控制数据驱动电路向增亮子像 素写入数据, 增亮子像素实现显示, 显示装置的亮度增强, 在高亮度的环境 下显示更清晰可见;当周围环境的亮度小于一定阈值,例如可以是小于 300nit, 则光敏电阻的阻值大于一定值, 使得同向输入单元输出端的电压小于反向输 入单元输出端输出的电压, 则三极管断开, 继电器输出一低电平, 所述时序 控制器输出关闭信号, 控制数据驱动电路不向增亮子像素写入数据, 增亮子 像素不实现显示, 进而节省耗电量。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局限 于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保 护范围应以所述权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种用于显示装置驱动控制的光敏控制器, 包括: 电压源、 同向输入 单元、 反向输入单元、 比较单元以及控制单元; 其中,
同向输入单元包括: 同向第一输入端, 与电压源的正极相连; 同向第二 输入端, 与电压源的负极相连; 以及同向输出端;
反向输入单元包括: 反向第一输入端, 与同向第一输入端相连; 反向第 二输入端, 与同向第二输入端相连; 以及反向输出端;
比较单元包括: 比较单元第一输入端, 与同向输出端相连; 比较单元第 二输入端, 与反向输出端相连; 比较单元第一输出端, 与反向第二输入端相 连; 比较单元第二输出端; 以及
控制单元包括: 控制单元第一输入端, 与反向第一输入端相连; 控制单 元第二输入端, 与比较单元第二输出端相连; 控制单元输出端, 用于输出控 制信号, 所述控制信号用于根据环境亮度变化控制显示装置的驱动电路。
2、根据权利要求 1所述的光敏控制器, 所述同向输入单元包括: 光敏电 阻、 第一电阻以及第二电阻, 其中,
光敏电阻的第一端为同向输入单元的同向第一输入端;
第二电阻的第一端与光敏电阻的第二端相连, 第二电阻的第二端为同向 输入单元的同向第二输入端; 以及
第一电阻的第一端与光敏电阻的第二端相连, 第一电阻的第二端为同向 输入单元的同向输出端。
3、 根据权利要求 1所述的光敏控制器, 所述反向输入单元包括: 第三电阻、 第五电阻和第四电阻, 其中,
第三电阻的第一端为反向输入单元的反向第一输入端;
第四电阻的第一端与第三电阻的第二端相连, 第四电阻的第二端为反向 输入单元的反向第二输入端; 以及
第五电阻的第一端与第三电阻第二端相连, 第五电阻的第二端为反向输 入单元的反向输出端。
4、 根据权利要求 1所述的光敏控制器, 所述比较单元包括: 比较器、 第 六电阻、 第七电阻、 第八电阻以及三极管; 其中,
比较器, 包括同向端、 反向端以及输出端, 其同向端与同向输入单元的 输出端相连, 其反向端与反向输入单元的输出端相连;
第七电阻的第一端与比较器的输出端相连;
第六电阻的第一端与比较器的反向端相连, 第六电阻的第二端与第七电 阻的第二端相连;
第八电阻的第一端与第七电阻的第二端相连; 以及
三极管, 包括基极、 发射极和集电极, 所述三极管的基极与第八电阻的 第二端相连, 发射极为比较单元第一输出端, 集电极为比较单元第二输出端。
5、根据权利要求 1所述的光敏控制器, 所述控制单元包括: 第九电阻和 继电器, 其中,
第九电阻的第一端为控制单元第一输入端, 第九电阻的第二端为控制单 元第二输入端; 以及
继电器, 包括第一输入端、 第二输入端和输出端, 其第一输入端与第九 电阻的第一端以及同向输入单元的同向第一输入端、 反向输入单元的反向第 一输入端相连, 其第二输入端与第九电阻的第二端以及比较单元第二输出端 相连, 其输出端为控制单元输出端。
6、 根据权利要求 1-5任一项所述的光敏控制器, 其中, 所述电压源的电 压在 2V-8V之间。
7、 根据权利要求 2-5任一项所述的光敏控制器, 其中, 所述第一电阻、 第三电阻、 第五电阻、 第六电阻、 第七电阻、 第八电阻和第九电阻的阻值在 1 Ω -1000Ω之间。
8、根据权利要求 2或 3所述的光敏控制器, 其中, 所述第二电阻和第四 电阻的阻值在 1 Ω -30 Ω之间。
9、 一种显示装置, 包括: 设置于显示面板上的多个像素、 用于控制多个 像素显示的数据驱动电路和栅驱动电路、 时序控制器以及解调器, 所述解调 器用于向所述时序控制器输出各个像素的图像信息, 所述时序控制器用于控 制所述数据驱动电路和栅驱动电路的输出时序, 其中:
所述每个像素包括多个子像素, 且所述多个子像素中至少一个为增亮子 像素; 以及
所述显示装置还包括与所述时序控制器相连的光敏控制器, 所述光敏控 制器采用如权利要求 1-8任一项所述的光敏控制器, 所述光敏控制器用于根 据环境亮度变化向时序控制器输出控制信号, 所述控制信号用于控制所述增 亮子像素的显示。
10、 根据权利要求 9所述的显示装置, 所述光敏控制器用于根据环境亮 度变化向时序控制器输出控制信号, 所述控制信号用于控制所述增亮子像素 的显示, 其中,
当环境亮度超过预设阈值时, 所述光敏控制器向所述时序控制器输出开 启信号, 所述开启信号控制数据驱动电路向所述增亮子像素输出数据信号, 使得所述增亮子像素显示;
当环境亮度低于预设阈值时, 所述光敏控制器向所述时序控制器输出关 闭信号, 所述关闭信号控制数据驱动电路停止向所述增亮子像素输出数据信 号, 使得所述增亮子像素不显示。
11、根据权利要求 9或 10所述的显示装置, 其中, 所述每个像素包括四 个不同颜色的子像素, 所述增亮子像素为白色子像素。
12、根据权利要求 11所述的显示装置, 其中, 所述增亮子像素与其他三 个子像素相对设置。
PCT/CN2013/078910 2013-04-08 2013-07-05 用于显示装置驱动控制的光敏控制器和显示装置 WO2014166173A1 (zh)

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