CN203150082U - Photosensitive controller for drive control for display device, and display device - Google Patents
Photosensitive controller for drive control for display device, and display device Download PDFInfo
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- 238000005282 brightening Methods 0.000 claims description 48
- 239000004973 liquid crystal related substance Substances 0.000 claims description 26
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Abstract
The utility model provides a photosensitive controller for drive control for a display device, and the display device. The photosensitive controller comprises a voltage source, a forward input unit, a reverse input unit, a comparison unit and a control unit. The display device comprises a plurality of pixels arranged on a display panel, a data drive circuit and a gate drive circuit which are used for controlling display for the plurality of pixels, a time sequence controller and a demodulator, wherein the demodulator is used for outputting the image information of each pixel to the time sequence controller; the time schedule controller is used for controlling the output time sequences of the data drive circuit and the gate drive circuit; and each pixel comprises a plurality of sub-pixels, and at least one of the plurality of sub-pixels is a brighter pixel. The display device further comprises the photosensitive controller connected with the time sequence controller and used for outputting a control signal to the time sequence controller according to the changes of an ambient brightness, wherein the control signal is used for controlling display for the brighter pixel.
Description
Technical Field
The utility model relates to a show technical field, especially relate to a photosensitive controller and display device for display device drive control.
Background
Liquid Crystal displays (lcds), also known as liquid Crystal displays, have low power consumption, and are therefore popular among engineers and suitable for use in various electronic devices. The main principle is that the electric field is used to control the liquid crystal to adjust the light transmittance to display images, and the liquid crystal display device can be applied to electronic products such as computers, mobile phones and the like.
Specifically, as shown in fig. 1, the conventional liquid crystal display includes: demodulator 100, timing controller 101, data driving circuit 102, gate driving circuit 103, and display panel 104. Among them, the display panel 104 includes: the pixel structure comprises a plurality of grid lines and a plurality of data lines, wherein the grid lines and the data lines are arranged in a crossed manner to form a plurality of sub-pixels with three different colors of red, green and blue. Each sub-pixel corresponds to one thin film transistor 30, and the method includes: and the gate electrode is electrically connected with the gate line, the source electrode is electrically connected with the data line, and the drain electrode is electrically connected with the pixel electrode of the sub-pixel. The data driving circuit 102 controls signal outputs of the data lines G1-Gn, and the gate driving circuit 103 controls signal outputs of the gate lines S1-Sn. Generally, when the display is in normal operation, the power supply provides required voltages to the modules, the demodulator 100 outputs image information of red, green and blue sub-pixels to the timing controller 101, the timing controller 101 controls the output timings of the data driving circuit 102 and the gate driving circuit 103, and the gate driving circuit 103 sequentially turns on the thin film transistors connected to each gate line one by one so that the data signal of the data driving circuit 102 is input to the corresponding sub-pixel, so that the liquid crystal in the sub-pixel region is deflected to display different images.
However, human eyes are sensitive to light, and if the brightness of the display screen is insufficient in places with bright outdoor light, images cannot be displayed clearly, and the visual effect is poor.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a photosensitive controller and display device for display device drive control, display device can change screen display luminance according to the luminance change of surrounding environment.
In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:
an embodiment of the utility model provides a photosensitive controller for display device drive control, include: the device comprises a voltage source, a homodromous input unit, a reverse input unit, a comparison unit and a control unit; wherein,
the equidirectional input unit includes: the equidirectional first input end is connected with the positive electrode of the voltage source; the equidirectional second input end is connected with the negative electrode of the voltage source; and a homodromous output end;
the reverse input unit includes: the reverse first input end is connected with the same-direction first input end; the backward second input end is connected with the same-direction second input end; and a reverse output;
the comparison unit includes: the first input end of the comparison unit is connected with the equidirectional output end; the second input end of the comparison unit is connected with the reverse output end; the first output end of the comparison unit is connected with the reverse second input end; a second output terminal of the comparison unit;
the control unit includes: the first input end of the control unit is connected with the reverse first input end; the second input end of the control unit is connected with the second output end of the comparison unit; and the output end of the control unit is used for outputting a control signal, and the control signal is used for controlling a driving circuit of the display device according to the change of the ambient brightness.
Specifically, the homodromous input unit includes: a photo-resistor, a second resistor, and a first resistor, wherein,
the first end of the photoresistor is a same-direction first input end of the same-direction input unit;
the first end of the second resistor is connected with the second end of the photosensitive resistor, and the second end of the second resistor is a homodromous second input end of the homodromous input unit;
the first end of the first resistor is connected with the second end of the photosensitive resistor, and the second end of the first resistor is a homodromous output end of the homodromous input unit.
Specifically, the reverse input unit includes:
a third resistor, a fifth resistor, and a fourth resistor, wherein,
the first end of the third resistor is an inverted first input end of the inverted input unit;
the first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is an inverted second input end of the inverted input unit;
the first end of the fifth resistor is connected with the second end of the third resistor, and the second end of the fifth resistor is an inverted output end of the inverted input unit.
Specifically, the comparison unit includes: the comparator, a sixth resistor, a seventh resistor, an eighth resistor and a triode; wherein,
the comparator comprises a homodromous end, a reverse end and an output end, wherein the homodromous end is connected with the output end of the homodromous input unit, and the reverse end is connected with the output end of the reverse input unit;
the first end of the seventh resistor is connected with the output end of the comparator;
the first end of the sixth resistor is connected with the reverse end of the comparator, and the second end of the sixth resistor is connected with the second end of the seventh resistor;
the first end of the eighth resistor is connected with the second end of the seventh resistor;
and the triode comprises a base electrode, an emitting electrode and a collector electrode, the base electrode of the triode is connected with the second end of the eighth resistor, the emitting electrode is a first output end of the comparison unit, and the collector electrode is a second output end of the comparison unit.
Specifically, the 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;
and the relay comprises a first input end, a second input end and an output end, wherein the first input end of the relay is connected with the first end of the ninth resistor, the equidirectional first input end of the equidirectional input unit and the reverse first input end of the reverse input unit, the second input end of the relay is connected with the second end of the ninth resistor and the second output end of the comparison unit, and the output end of the relay is the output end of the control unit.
Specifically, the voltage of the voltage source is between 2V and 8V.
Specifically, the resistance values 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 Ω -1000 Ω.
Specifically, the resistance values of the second resistor and the fourth resistor are between 1 Ω and 30 Ω.
An embodiment of the utility model provides a still provide a display device, include: a plurality of pixels disposed on a display panel, a data driving circuit and a gate driving circuit for controlling the display of the plurality of pixels, a timing controller for outputting image information of each pixel to the timing controller, and a demodulator for controlling output timings of the data driving circuit and the gate driving circuit, wherein,
each pixel comprises a plurality of sub-pixels, and at least one of the sub-pixels is a brightness-enhancing sub-pixel;
the display device also comprises a photosensitive controller connected with the time sequence controller, the photosensitive controller adopts any one of the photosensitive controllers, the photosensitive controller is used for outputting a control signal to the time sequence controller according to the change of the ambient brightness, and the control signal is used for controlling the display of the brightening sub-pixel.
Further, the photosensitive controller is configured to output a control signal to the timing controller according to a change in ambient brightness, where the control signal is configured to control display of the brightness enhancement sub-pixel, and specifically:
when the ambient brightness exceeds a preset threshold value, the photosensitive controller outputs a starting signal to the time sequence controller, and the starting signal controls the data driving circuit to output a data signal to the brightening sub-pixel so that the brightening sub-pixel is displayed;
when the ambient brightness is lower than a preset threshold value, the photosensitive controller outputs a closing signal to the time sequence controller, and the closing signal controls the data driving circuit to stop outputting the data signal to the brightening sub-pixel, so that the brightening sub-pixel does not display.
Further, each pixel comprises four sub-pixels with different colors, and the brightening sub-pixel is a white sub-pixel.
Further, the brightness-enhancing sub-pixel is arranged opposite to the other three sub-pixels.
The embodiment of the utility model provides a photosensitive controller and display device for display device drive control because display device has increased blast sub-pixel and photosensitive controller for can be along with ambient brightness's change, select whether blast sub-pixel shows, with the regulation display brightness. When the ambient brightness is greater than the preset threshold value, the photosensitive controller outputs a control signal to control the data driving circuit to output a data signal to the brightening sub-pixel for displaying, so that the display brightness is improved, and the display device can display more clearly when the ambient brightness is higher; when the ambient brightness is lower than the preset threshold, the photosensitive controller outputs a control signal to control the data driving circuit to stop outputting the data signal to the brightening sub-pixel, namely, the brightening sub-pixel does not display, and the display device can save power consumption in a dark environment.
Drawings
FIG. 1 is a schematic diagram of a conventional LCD;
fig. 2 is a schematic structural diagram of an array substrate according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a pixel structure according to an embodiment of the present invention;
fig. 4 is a schematic view of another pixel structure 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;
reference numerals:
100-a demodulator; 101-a time schedule controller; 102-a data driving circuit; 103-a gate drive circuit; 104-a display panel; 105-a photosensitive controller; 30-a thin film transistor; r-red sub-pixel; g-green sub-pixel; b-blue sub-pixel; w-white sub-pixel; 11-a homodromous input unit; 12-a reverse input unit; 13-a comparison unit; 14-a control unit; rL-a light sensitive resistor; r1 — first resistance; r2 — second resistance; r3 — third resistance; r4-fourth resistor; r5-fifth resistor; r6-sixth resistance; r7 — seventh resistor; r8 — eighth resistance; r9 — ninth resistor; a T-triode; a K-relay.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
An embodiment of the utility model provides a display device, include: the display device comprises a plurality of pixels, a data driving circuit, a gate driving circuit, a time sequence controller and a demodulator, wherein the data driving circuit and the gate driving circuit are used for controlling the display of the pixels;
the display device also comprises a photosensitive controller connected with the time sequence controller, the photosensitive controller is used for outputting control signals to the time sequence controller according to the change of the ambient brightness, and the control signals are used for controlling the display of the brightening sub-pixels.
It should be noted that the display panel is provided with a plurality of pixels, and the display panel may be a liquid crystal display panel, an organic light emitting display panel, or any other active matrix display panel having a plurality of pixels. The display panel generally includes an array substrate and a color filter substrate. A pixel is a basic unit of image display, and generally includes three sub-pixels of different colors, i.e., red (R), green (G), and blue (B). Each sub-pixel is positioned in a grid structure formed by a plurality of grid lines and data lines which are arranged in a crossed mode on the array substrate, wherein each sub-pixel corresponds to a thin film transistor, and the thin film transistor comprises: the grid electrode of the thin film transistor is connected with the grid line, the source electrode of the thin film transistor is connected with the data line, and the drain electrode of the thin film transistor is connected with the pixel electrode. Since the gate driving circuit controls the output of the gate line signal and the data driving circuit controls the output of the data line signal, the control of the gate driving circuit and the data driving circuit can control the on of the thin film transistor of the corresponding sub-pixel and the input of the data signal, i.e., the pixel electrode voltage, thereby controlling the display brightness of each sub-pixel. The color filter layers with different colors are arranged on the color film substrate and correspond to the sub-pixels on the array substrate one by one, and the color display of the display device can be realized.
In other structures of display panels, the color filter layer may also be integrated on the array substrate, that is, on the basis of the above structure of the array substrate, after the structures such as the thin film transistor, the gate line, the data line, etc. are manufactured, the color filter layer is manufactured above the structures, and then the opposite substrate of the array substrate is generally a transparent substrate. Specifically, the embodiment of the present invention is described with a structure in which a color filter layer is integrated on an array substrate, 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 comprise sub-pixels with four different colors, namely red (R), green (G), blue (B) and white (W), wherein the white sub-pixel is a brightening sub-pixel. Of course, the number of sub-pixels included in each pixel is not limited to four, each pixel may also include sub-pixels of other colors, and the brightness enhancing sub-pixel may also be a transparent sub-pixel. The brightness enhancement sub-pixel is a sub-pixel having a higher light transmittance and a higher display luminance than the red, green, and blue sub-pixels. For example, 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%, and the transmittance of the white sub-pixel can reach more than 96%. The embodiment of the utility model provides an in other structures of display device are the same with prior art, and no longer describe here.
In the related art liquid crystal display device, as shown in fig. 1, a power supply supplies a required voltage to each module, a demodulator 100 outputs image information (e.g., image information of RGB pixels) of sub-pixels of different colors to a timing controller 101, and the timing controller 101 outputs timing signals to a gate driving circuit 103 and a data driving circuit 102, and controls output timings of the gate driving circuit 103 and the data driving circuit 102, respectively. The array substrate comprises a plurality of grid lines and data lines, the grid lines and the data lines are vertically distributed to form a grid shape, a sub-pixel is formed in each grid, each sub-pixel comprises a thin film transistor, each thin film transistor comprises a grid electrode, a source electrode and a drain electrode, the grid electrode is connected with the grid lines, and the source electrode is connected with the data lines. The gate driving circuit 103 sequentially turns on the thin film transistors connected to each gate line one by one so that the sub-pixels corresponding to the thin film transistors write data input by the corresponding data driving circuit 102, that is, voltages of the pixel electrodes, control liquid crystal deflection, and display different pictures.
In an embodiment of the present invention, 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 brightness enhancement sub-pixel. The display device further includes: and the photosensitive controller is connected with the time schedule controller and is used for outputting a control signal to the time schedule controller according to the change of the ambient brightness, and the control signal is used for controlling the display of the brightening sub-pixel, namely, the data driving circuit outputs the corresponding pixel electrode voltage to the brightening sub-pixel.
Specifically, the display device includes four sub-pixels of red (R), green (G), blue (B), and white (W), and the brightness enhancement sub-pixel is a white sub-pixel. Correspondingly, the demodulator inputs image information of red (R), green (G), blue (B) and white (W) sub-pixels to the time sequence controller, the photosensitive controller outputs control signals to the time sequence controller according to the change of the brightness of the external environment, the time sequence controller controls the output time sequences of the gate driving circuit and the data driving circuit, except that the conventional control gate driving circuit sequentially opens the thin film transistors on each gate line and the data driving circuit to output pixel electrode voltage data to the red, green and blue sub-pixels, the time sequence controller controls whether data of the white sub-pixels are written or not according to the control signals input by the photosensitive controller, and therefore whether liquid crystals corresponding to the white sub-pixels are deflected or not is controlled. 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, so that light transmission is realized, and the display brightness is further improved; or, when the brightness of the surrounding environment is less than a certain threshold, the liquid crystal corresponding to the white sub-pixel may not be deflected, i.e., the sub-pixel is opaque, so as to save power consumption.
It should be noted that the Display device provided by the embodiments of the present invention can also be applied to an Organic Light Emitting Display (OLED) device and any other active matrix Display device having a plurality of pixels. When the light-sensitive controller is used for the organic light-emitting display device, the light-sensitive controller outputs a control signal to the time sequence controller according to the ambient brightness, and the control signal is used for controlling whether the brightening sub-pixel (such as a white sub-pixel) emits light or not, namely when the ambient brightness is higher than a preset threshold value, the brightening sub-pixel emits light, the display brightness is improved, and when the ambient brightness is lower than the preset threshold value, the brightening sub-pixel does not emit light, so that the energy consumption is saved.
When the display device is a liquid crystal display device, the liquid crystal display device controls liquid crystal deflection by using an electric field to change light transmittance so as to display images. Liquid crystal display devices are roughly classified into a vertical electric field driving type and a horizontal electric field driving type according to the direction of an electric field for driving liquid crystals. The vertical electric field driving type liquid crystal display device has a common electrode and a pixel electrode disposed opposite to each other on upper and lower substrates, and a vertical electric field is formed between the common electrode and the pixel electrode to drive liquid crystal, such as a TN (twisted Nematic) type, VA (vertical alignment) type liquid crystal display device. The liquid crystal display device of the horizontal electric field driving type sets a common electrode and a pixel electrode on a lower substrate, and forms a horizontal or multidimensional electric field between the common electrode and the pixel electrode to drive liquid crystal, such as an ADS (Advanced-Super Dimensional Switching) type, an IPS (In Plane Switch) type liquid crystal display device. The embodiment of the utility model provides a display device can be applicable to the liquid crystal display device of above-mentioned arbitrary type.
An embodiment of the utility model provides a display device, display device includes a plurality of pixels, and every pixel includes a plurality of sub-pixels, just at least one is the blast sub-pixel among a plurality of sub-pixels. The display device also comprises a photosensitive controller, and the photosensitive controller can select whether the brightening sub-pixel displays according to the change of the ambient brightness, so that the display device can display more clearly when the ambient brightness is higher, and the display device can save power consumption when the ambient brightness is not high.
Optionally, the photosensitive controller is configured to output a control signal to the timing controller according to a change of ambient brightness, where the control signal is configured to control display of the brightness enhancement sub-pixel, and the control signal specifically includes:
when the ambient brightness exceeds a preset threshold value, the photosensitive controller outputs a starting signal to the time sequence controller, the starting signal controls the data driving circuit to output a data signal to the brightening sub-pixel, and the brightening sub-pixel displays to improve the display brightness;
when the ambient brightness is lower than the preset threshold value, the photosensitive controller outputs a closing signal to the time sequence controller, the closing signal controls the data driving circuit to stop outputting the data signal to the brightening sub-pixel, and the brightening sub-pixel is not displayed any more, so that the power consumption is saved.
For example, when the brightness of the surrounding environment is greater than 300nit, the photosensitive controller outputs a start signal to the timing controller, and the timing controller controls the data driving circuit to write data to the brightening sub-pixels according to the control signal output by the photosensitive controller and the image information output by the demodulator, that is, the voltage of the pixel electrodes of the brightening sub-pixels is controlled, so as to realize display; and when the brightness of the surrounding environment is less than 300nit, the photosensitive controller outputs a closing signal to the time sequence controller, and the time sequence controller controls the data driving circuit not to write data into the brightening sub-pixel and the brightening sub-pixel not to display according to the control signal output by the photosensitive controller and the image information output by the demodulator. It should be noted that the brightness threshold may be adjustable according to the actual environment, and the embodiment of the present invention takes the threshold as 300nit as an example for explanation.
Optionally, the demodulator is an FPGA (Field-Programmable Gate Array) demodulator.
Optionally, each pixel on the display substrate includes four different color sub-pixels, and the brightness enhancing sub-pixel is a white sub-pixel. Specifically, as shown in fig. 2, 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 white sub-pixel (W) is a brightness enhancement sub-pixel. Of course the brightness enhancing sub-pixel may also be a clear sub-pixel or a sub-pixel of another color. For example, a yellow subpixel or the like may be used.
Optionally, the brightening sub-pixel is opposite to the other three sub-pixels. Specifically, each pixel includes four sub-pixels with different colors, the four sub-pixels with different colors may be sequentially arranged, or as shown in fig. 3 and 4, the brightness enhancement sub-pixel is disposed opposite to the sub-pixels with three other colors. Taking the sub-pixel shape as a rectangle as an example, the arrangement of the brightening sub-pixel opposite to the sub-pixels of other three colors means that the long side of the brightening sub-pixel corresponds to the short side of the three brightening sub-pixels, the brightening sub-pixel can be located at any position of the three sub-pixels, and is determined by the arrangement mode of the three sub-pixels, preferably, the three sub-pixels are vertically arranged, and the brightening sub-pixels are horizontally arranged above or below the three sub-pixels, so that the brightness of the sub-pixel of each color can be improved, and the display effect is better.
Specifically, the embodiment of the utility model provides a still provide a photosensitive controller for display device drive control, can be according to ambient brightness change to time schedule controller output control signal.
Alternatively, as shown in fig. 5, the photosensitive controller includes: a voltage source, a homodromous input unit 11, an inverse input unit 12, a comparison unit 13 and a control unit 14; wherein,
the unidirectional input unit 11 is used for outputting a comparison voltage, and includes: the equidirectional first input end is connected with the positive electrode of the voltage source; the equidirectional second input end is connected with the negative electrode of the voltage source; and a homodromous output end;
the inverting input unit 12 is for outputting a reference voltage, and includes: the reverse first input end is connected with the same-direction first input end; the backward second input end is connected with the same-direction second input end; and a reverse output;
the comparison unit 13 is used for comparing the comparison voltage with the reference voltage and according to the conducting state of the comparison result, and comprises a first input end of the comparison unit and a first output end in the same direction; the second input end of the comparison unit is connected with the reverse output end; the first output end of the comparison unit is connected with the reverse second input end; a second output terminal of the comparison unit;
the control unit 14 is used for outputting a control signal according to the conducting state of the circuit, and comprises a first input end of the control unit, and a second input end of the control unit, wherein the first input end is connected with the reverse first input end; the second input end of the control unit is connected with the second output end of the comparison unit; and the output end of the control unit is used for outputting a control signal.
The voltage source is used for providing a fixed voltage, the homodromous input unit is used for generating a comparison voltage, the reverse input unit is used for generating a reference voltage, after the comparison voltage and the reference voltage are compared by the comparison unit, if the comparison voltage is greater than the reference voltage, the comparison unit conducts the whole circuit, the control unit outputs a high level, a control signal output to the time schedule controller by the photosensitive controller is a starting signal of a corresponding brightening sub-pixel, namely, data are written into the brightening sub-pixel by the data driving circuit; if the comparison voltage is less than the reference voltage, the comparison unit disconnects the whole circuit, the control unit outputs a low level, and the control signal output by the photosensitive controller to the time schedule controller is the closing signal of the corresponding brightening sub-pixel, namely the data driving circuit does not write data into the brightening sub-pixel. Wherein the magnitude of the comparison voltage is related to the brightness of the surrounding environment, and the reference voltage may be a fixed threshold for comparison with the comparison voltage.
Optionally, as shown in fig. 5, the homodromous input unit 11 includes: photoresistor RLA first resistor R1 and a second resistor R2, wherein,
photoresistor RLThe self-resistance can be changed according to the brightness change of the surrounding environment, and the first end of the self-resistance is the same-direction first input end of the same-direction input unit;
the first end of the second resistor R2 and the photoresistor RLA second terminal of the second resistor R2 is a unidirectional second input terminal of the unidirectional input unit;
the first end of the first resistor R1 and the photoresistor RLAnd the second terminal of the first resistor R1 is the unidirectional output terminal of the unidirectional input unit.
Specifically, the photoresistor can change the resistance of the photoresistor according to the brightness of the surrounding environment, change the current of the equidirectional input unit, and further change the output voltage of the equidirectional output end. When the brightness of the surrounding environment is higher, the resistance value of the photoresistor is smaller, and the comparison voltage output by the corresponding homodromous output end is higher; when the brightness of the surrounding environment is smaller, the resistance value of the photosensitive resistor is larger, and the comparison voltage output by the corresponding equidirectional output end is smaller.
Optionally, the reverse input unit 12 includes: a third resistor R3, a fifth resistor R5, and a fourth resistor R4, wherein,
a first end of the third resistor R3 is an inverting first input end of the inverting input unit;
a first end of the fourth resistor R4 is connected to a second end of the third resistor R3, and a second end of the fourth resistor R4 is an inverted second input end of the inverting input unit;
a first terminal of the fifth resistor R5 is connected to a second terminal of the third resistor R3, and a second terminal of the fifth resistor R5 is an inverting output terminal of the inverting input unit.
Optionally, the comparing unit 13 includes: the circuit comprises a comparator U, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a triode T; wherein,
the comparator U comprises a homodromous end, a reverse end and an output end, wherein the homodromous end is connected with the output end of the homodromous input unit, and the reverse end is connected with the output end of the reverse input unit;
a first end of the seventh resistor R7 is connected with an output end of the comparator U;
a first end of the sixth resistor R6 is connected with the reverse end of the comparator U, and a second end of the sixth resistor R6 is connected with a second end of the seventh resistor R7;
a first end of the eighth resistor R8 is connected with a second end of the seventh resistor R7;
and the triode T comprises a base B, an emitter E and a collector C, wherein the base B is connected with the second end of the eighth resistor R8, the emitter E is a first output end of the comparison unit, and the collector C is a second output end of the comparison unit.
Specifically, a homodromous end of the comparator is connected with an output end of the homodromous input unit, a reverse end of the comparator is connected with an output end of the reverse input unit, the comparator is used for comparing a comparison voltage input by the homodromous input end with a reference voltage input by the reverse input end, and if the comparison voltage is greater than the reference voltage, the triode is conducted; and if the comparison voltage is less than the reference voltage, the triode is disconnected.
It should be noted that, the switching tube in the comparison unit illustrated in the figure is a triode, in practice, two parallel diodes may be used instead of the triode, or any other device capable of realizing the function of the switching tube, which is not limited by the present invention.
Optionally, the control unit 14 includes: a ninth resistor R9 and a relay K, wherein,
a first end of the ninth resistor R9 is a first input end of the control unit, and a second end of the ninth resistor R9 is a second input end of the control unit;
the relay K comprises a first input end, a second input end and an output end, wherein the first input end of the relay K is connected with the first end of the ninth resistor R9, the same-direction first input end of the same-direction input unit and the reverse-direction first input end of the reverse-direction input unit, the second input end of the relay K is connected with the second end of the ninth resistor R9 and the second output end of the comparison unit, and the output end of the relay K is the output end of the control unit. Specifically, when the comparison voltage is greater than the reference voltage, the triode of the comparison unit is conducted, and the output end of the relay outputs a high level; when the comparison voltage is smaller than the reference voltage, the triode of the comparison unit is disconnected, and the output end of the relay outputs a low level.
Optionally, the voltage of the voltage source is between 2V and 8V.
Optionally, as shown in the figure, 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 Ω and 1000 Ω. It should be understood that the resistor is illustrated as a fixed resistor, and in practice, the resistor may also be an adjustable resistor, which is not limited by the present invention.
Optionally, the resistance values of the second resistor and the fourth resistor are between 1 Ω and 30 Ω. It is to be understood that the figures are 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 selection of the reference voltage cannot be adjusted at will, so that the second resistor and the fourth resistor are preferably adjustable resistors, such as sliding resistors.
It should be noted that, for convenience of description, the first end of each resistor refers to the upper end or the left end of each resistor shown in the drawing, and the second end of each resistor refers to the lower end or the right end of each resistor shown in the drawing.
It should be noted that, the threshold value of predetermineeing of ambient brightness can be adjusted as required, if has higher requirement to the display quality in brighter environment, predetermines the threshold value and can be lower, if has higher requirement to the power saving in darker environment, predetermines the threshold value and can some higher relatively, these the utility model discloses all do not do the restriction. Specifically, the voltage regulation may be implemented by adjusting a value of a reference voltage output from the inverting input unit.
The embodiment of the present invention further provides a driving method of a display device using the above photosensitive controller, as shown in fig. 6, the photosensitive controller 105 outputs a control signal to the timing controller 101 according to the brightness change of the surrounding environment, the control signal is used to control the output of the data driving circuit to the brightness enhancement sub-pixel, and further controls whether the corresponding brightness enhancement sub-pixel displays or not; the demodulator 100 is connected to the timing controller 101, and outputs image information of each sub-pixel including the boosting sub-pixel to the timing controller 101; 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 photosensitive controller 105.
The photosensitive controller comprises a photosensitive resistor, and the resistance value of the photosensitive resistor decreases along with the increase of the brightness of the surrounding environment and increases along with the decrease of the brightness of the surrounding environment.
The photosensitive controller is used for outputting a control signal to the time sequence controller according to the change of the ambient brightness, the control signal is used for controlling the data driving circuit to output a data signal to the brightening sub-pixel, and the method specifically comprises the following steps: when the ambient brightness exceeds a preset threshold value, the photosensitive controller outputs a high level to the time schedule controller, then the time schedule controller outputs a starting signal, and the starting signal controls the data driving circuit to output a data signal to the brightening sub-pixel so that the brightening sub-pixel is displayed; or when the ambient brightness is lower than the preset threshold, the photosensitive controller outputs a low level to the timing controller, the timing controller outputs a closing signal, and the closing signal controls the data driving circuit to stop outputting the data signal to the brightening sub-pixel, so that the brightening sub-pixel does not display.
Specifically, the power supply provides required voltage for each module, in the photosensitive controller, the resistance value of the photosensitive resistor can be automatically adjusted according to the brightness of the surrounding environment, and when the brightness of the surrounding environment is greater than a certain threshold value, for example, greater than 300nit, the resistance value of the photosensitive resistor is smaller than a certain value, so that the voltage of the output end of the homodromous input unit is greater than the voltage of the output end of the reverse input unit, the triode is conducted, the relay outputs a high level, the timing controller outputs a start signal, the data driving circuit is controlled to write data into the brightening sub-pixel, the brightening sub-pixel realizes display, the brightness of the display device is enhanced, and the display is clearer and more visible in the high-brightness environment; when the brightness of the surrounding environment is less than a certain threshold, for example, less than 300nit, the resistance of the photo resistor is greater than a certain value, so that the voltage at the output end of the homodromous input unit is less than the voltage at the output end of the reverse input unit, the triode is turned off, the relay outputs a low level, the timing controller outputs a turn-off signal, the data driving circuit is controlled not to write data into the brightening sub-pixel, the brightening sub-pixel does not realize display, and power consumption is further saved.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A photosensitive controller for drive control of a display device, comprising: the device comprises a voltage source, a homodromous input unit, a reverse input unit, a comparison unit and a control unit; wherein,
the equidirectional input unit includes: the equidirectional first input end is connected with the positive electrode of the voltage source; the equidirectional second input end is connected with the negative electrode of the voltage source; and a homodromous output end;
the reverse input unit includes: the reverse first input end is connected with the same-direction first input end; the backward second input end is connected with the same-direction second input end; and a reverse output;
the comparison unit includes: the first input end of the comparison unit is connected with the equidirectional output end; the second input end of the comparison unit is connected with the reverse output end; the first output end of the comparison unit is connected with the reverse second input end; a second output terminal of the comparison unit;
the control unit includes: the first input end of the control unit is connected with the reverse first input end; the second input end of the control unit is connected with the second output end of the comparison unit; and the output end of the control unit is used for outputting a control signal, and the control signal is used for controlling a driving circuit of the display device according to the change of the ambient brightness.
2. The photosensitive controller of claim 1, wherein the homodromous input unit comprises: a photo-resistor, a first resistor, and a second resistor, wherein,
the first end of the photoresistor is a same-direction first input end of the same-direction input unit;
the first end of the second resistor is connected with the second end of the photosensitive resistor, and the second end of the second resistor is a homodromous second input end of the homodromous input unit;
the first end of the first resistor is connected with the second end of the photosensitive resistor, and the second end of the first resistor is a homodromous output end of the homodromous input unit.
3. The photosensitive controller of claim 1, wherein the inverting input unit comprises:
a third resistor, a fifth resistor, and a fourth resistor, wherein,
the first end of the third resistor is an inverted first input end of the inverted input unit;
the first end of the fourth resistor is connected with the second end of the third resistor, and the second end of the fourth resistor is an inverted second input end of the inverted input unit;
the first end of the fifth resistor is connected with the second end of the third resistor, and the second end of the fifth resistor is an inverted output end of the inverted input unit.
4. The photosensitive controller of claim 1, wherein the comparison unit comprises: the comparator, a sixth resistor, a seventh resistor, an eighth resistor and a triode; wherein,
the comparator comprises a homodromous end, a reverse end and an output end, wherein the homodromous end is connected with the output end of the homodromous input unit, and the reverse end is connected with the output end of the reverse input unit;
the first end of the seventh resistor is connected with the output end of the comparator;
the first end of the sixth resistor is connected with the reverse end of the comparator, and the second end of the sixth resistor is connected with the second end of the seventh resistor;
the first end of the eighth resistor is connected with the second end of the seventh resistor;
and the triode comprises a base electrode, an emitting electrode and a collector electrode, the base electrode of the triode is connected with the second end of the eighth resistor, the emitting electrode is a first output end of the comparison unit, and the collector electrode is a second output end of the comparison unit.
5. The photosensitive controller of claim 1, wherein the control unit comprises: 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;
and the relay comprises a first input end, a second input end and an output end, wherein the first input end of the relay is connected with the first end of the ninth resistor, the equidirectional first input end of the equidirectional input unit and the reverse first input end of the reverse input unit, the second input end of the relay is connected with the second end of the ninth resistor and the second output end of the comparison unit, and the output end of the relay is the output end of the control unit.
6. A photosensitive controller according to any one of claims 1 to 5, in which the voltage of the voltage source is between 2V and 8V.
7. The photosensitive controller according to any one of claims 2 to 5, wherein the first resistor, the third resistor, the fifth resistor, the sixth resistor, the seventh resistor, the eighth resistor and the ninth resistor have a resistance value of 1 Ω -1000 Ω.
8. A photosensitive controller according to claim 2 or 3, wherein the second and fourth resistors have a resistance of between 1 Ω -30 Ω.
9. A display device, comprising: the liquid crystal display device comprises a plurality of pixels arranged on a display panel, a data driving circuit and a gate driving circuit for controlling the display of the pixels, a time schedule controller and a demodulator, wherein the demodulator is used for outputting image information of each pixel to the time schedule controller, and the time schedule controller is used for controlling the output time schedule of the data driving circuit and the gate driving circuit, and the liquid crystal display device is characterized in that:
each pixel comprises a plurality of sub-pixels, and at least one of the sub-pixels is a brightness-enhancing sub-pixel;
the display device further comprises a photosensitive controller connected with the timing controller, wherein the photosensitive controller is used as the photosensitive controller according to any one of claims 1 to 8, and the photosensitive controller is used for outputting a control signal to the timing controller according to the change of the ambient brightness, and the control signal is used for controlling the display of the brightness-increasing sub-pixel.
10. The display device according to claim 9, wherein the photosensitive controller is configured to output a control signal to the timing controller according to the ambient brightness variation, the control signal being configured to control the display of the brightness-enhanced sub-pixel, and specifically:
when the ambient brightness exceeds a preset threshold value, the photosensitive controller outputs a starting signal to the time sequence controller, and the starting signal controls the data driving circuit to output a data signal to the brightening sub-pixel so that the brightening sub-pixel is displayed;
when the ambient brightness is lower than a preset threshold value, the photosensitive controller outputs a closing signal to the time sequence controller, and the closing signal controls the data driving circuit to stop outputting the data signal to the brightening sub-pixel, so that the brightening sub-pixel does not display.
11. A display device as claimed in claim 9 or 10, wherein each pixel comprises four sub-pixels of different colours, and the brightness enhancing sub-pixel is a white sub-pixel.
12. The display device according to claim 11, wherein the boosting sub-pixel is disposed opposite to the other three sub-pixels.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320172293 CN203150082U (en) | 2013-04-08 | 2013-04-08 | Photosensitive controller for drive control for display device, and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320172293 CN203150082U (en) | 2013-04-08 | 2013-04-08 | Photosensitive controller for drive control for display device, and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198806A (en) * | 2013-04-08 | 2013-07-10 | 北京京东方光电科技有限公司 | Photoactivity controller and display device for display device drive control |
| CN108417149A (en) * | 2018-05-23 | 2018-08-17 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN110556408A (en) * | 2019-09-10 | 2019-12-10 | 京东方科技集团股份有限公司 | Display substrate, control method thereof and display device |
| CN110827781A (en) * | 2019-11-26 | 2020-02-21 | 上海天马微电子有限公司 | Adjusting circuit, display screen, display device and display method |
-
2013
- 2013-04-08 CN CN 201320172293 patent/CN203150082U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103198806A (en) * | 2013-04-08 | 2013-07-10 | 北京京东方光电科技有限公司 | Photoactivity controller and display device for display device drive control |
| CN103198806B (en) * | 2013-04-08 | 2016-03-23 | 北京京东方光电科技有限公司 | A kind of display device |
| CN108417149A (en) * | 2018-05-23 | 2018-08-17 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN108417149B (en) * | 2018-05-23 | 2020-06-19 | 武汉天马微电子有限公司 | Display panel, driving method thereof and display device |
| CN110556408A (en) * | 2019-09-10 | 2019-12-10 | 京东方科技集团股份有限公司 | Display substrate, control method thereof and display device |
| CN110827781A (en) * | 2019-11-26 | 2020-02-21 | 上海天马微电子有限公司 | Adjusting circuit, display screen, display device and display method |
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