CN201369152Y - RGB backlight type color liquid crystal display component - Google Patents
RGB backlight type color liquid crystal display component Download PDFInfo
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- CN201369152Y CN201369152Y CNU200920009260XU CN200920009260U CN201369152Y CN 201369152 Y CN201369152 Y CN 201369152Y CN U200920009260X U CNU200920009260X U CN U200920009260XU CN 200920009260 U CN200920009260 U CN 200920009260U CN 201369152 Y CN201369152 Y CN 201369152Y
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Abstract
The utility model relates to a RGB backlight type color liquid crystal display component comprising a liquid crystal display panel, a backlight, a backlight switch circuit, a driving circuit and a central processor. The RGB backlight type color liquid crystal display component is characterized in that the backlight adopts an RGB light emitting dioxide backlight; the signal output end of the central processor is electrically connected with the signal input end of the driving circuit; the signal output end of the driving circuit is electrically connected with the pixel electrode of the liquid crystal display panel and the signal input end of the backlight switch circuit respectively; and the signal output end of the backlight switch circuit is electrically connected with the RGB light emitting dioxide backlight which is in direct optical transmission matching with the liquid crystal display panel. Therefore, the RGB backlight type color liquid crystal display component is unnecessarily collocated with a colored filter, and the production cost is greatly reduced; and meanwhile, the RGB backlight type color liquid crystal display component has low backlight power consumption, thereby greatly improving the utilization ratio of light and having richer displayed colors.
Description
Technical field
The utility model relates to a kind of RGB backlight type Color Liquid Crystal Display assembly, more particularly, relates to the RGB backlight type Color Liquid Crystal Display assembly that a kind of cost is low, power consumption is little.
Background technology
Along with photoelectricity and development of semiconductor, flat-panel screens is also followed flourish, in existing flat-panel screens, LCD becomes the main flow in market gradually because of it has advantages such as high spatial utilization factor, low consumpting power, radiationless and low electromagnetic interference (EMI).Because display panels itself do not have luminous function, thereby must dispose backlight assembly providing display panels required area source, and then make display panels reach the function of demonstration.
Liquid crystal display device can come display image by the optically anisotropic characteristic of using liquid crystal, in the time of on rayed has according to the liquid crystal of the polarization characteristic of applying voltage, liquid crystal is by orientation, liquid crystal display device just can be according to the orientation state of liquid crystal, the light quantity of control liquid crystal and display image.
Liquid crystal display (Liquid Crystal Display, LCD) control principle is as follows: the voltage that is added in the liquid crystal molecule two ends by change, the voltage difference of liquid crystal molecule is changed, thereby the size of the power that the change liquid crystal molecule is subjected to, make liquid crystal molecule under the effect of this voltage difference, make corresponding upset, form distortion; When liquid crystal molecule twist into the light parallel direction more near the time, the throughput of incident light is just many more, when liquid crystal molecule twist into the light vertical direction more near the time, the throughput of incident light is just few more, the final realization controlled the throughput of incident light, obtain the light throughput between maximal value and the minimum value, to show different incident light transmitances.
Its light source backlight of conventional liquid crystal generally is designed to white light, shows the color of each pixel by the colored filter on each location of pixels (color filter).Generally speaking, a pixel generally is made of three sub-pixels, and redness (R), green (G), blue (B) colored filter can be set on the location of pixels, and colored filter is corresponding with sub-pixel respectively.Then, by controlling the logical light intensity of each sub-pixel, again via the pairing redness of each sub-pixel (R), green (G), blue (B) colored filter modulation, (people sees in behind the object 0.1 second to utilize the persistence of vision characteristics of human eye, even object has disappeared, still the image that has object in people's the eyes), in a short period of time, the redness (R) that will successively occur at the same point different time, green (G), blue (B) three kinds of colors stack up, can obtain required color and brightness, and can be by adjusting red (R), green (G), the length of blue (B) three kinds of color time of occurrences and the ratio of brightness change the color of demonstration.
Existing LCD, its single pixel is on the colour mixture principle, be by red (R), green (G), blue (B) three sub-pixels (sub-pixel) on the spatial axes, making colour mixture less than the scope at human eye visual angle, this technology must dispose colored filter, thereby its cost is higher, and the transmittance that shows through each pixel behind the colored filter is low greatly, thereby its power consumption is big.Simultaneously, the attachment process of this technology requires high, is easy to cause the yields of LCD to descend, and reduced the spatial resolution of LCD, and the gamut range of LCD is less, above-mentioned drawbacks limit the LCD cost performance.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of RGB backlight type Color Liquid Crystal Display assembly, and this RGB backlight type Color Liquid Crystal Display assembly must not dispose colored filter, thereby its cost is low, power consumption is little.
In order to solve the problems of the technologies described above, the technical solution adopted in the utility model is as follows:
A kind of RGB backlight type Color Liquid Crystal Display assembly comprises display panels (LCDpanel), backlight, backlight switch circuit, driving circuit and central processing unit (MCU), it is characterized in that: above-mentioned employing RGB LED backlight backlight; The signal output part of above-mentioned central processing unit is electrically connected with the signal input part of driving circuit, the signal output part of above-mentioned driving circuit is electrically connected with the pixel electrode of display panels and the signal input part of backlight switch circuit respectively, the signal output part of above-mentioned backlight switch circuit is electrically connected with the RGB LED backlight, and above-mentioned RGB LED backlight directly cooperates (need not to dispose colored filter) with the display panels light transmission.
As preferred structure of the present utility model, described driving circuit adopts integrated drive electronics (IC-integrate circuit).Above-mentioned integrated drive electronics is except controlling the display panels, can also export RGB LED backlight control signal and give the backlight switch circuit, orderly break-make with three primary colors lamp in the control RGB LED backlight makes the liquid crystal content the required color of each display pixel of liquid crystal to be set easily according to application demand.
As further improvement of the utility model, described integrated drive electronics adopts COG (Chip On Glass) to be bundled on the display panels.Peripheral passive device of above-mentioned integrated drive electronics (as electric capacity etc.) and backlight switch circuit are in together on the flexible circuit board FPC (or printing board PCB) of display panels external interface, help simplifying and embedded backlight switch circuit, to satisfy microminiaturized requirement.
Above-mentioned central processing unit is a prior art, is not described in any further at this.Above-mentioned central processing unit is preferably by flexible circuit board FPC (or printing board PCB) and the mutual communication of integrated drive IC.
Above-mentioned display panels can also comprise STN type, TFT type display panels etc. including, but not limited to TN type display panels.
Described RGB LED backlight comprises red light emitting diodes light source, green LED light source, blue LED light source, first current-limiting resistance, second current-limiting resistance and the 3rd current-limiting resistance, and an end of above-mentioned red light emitting diodes light source, green LED light source and blue LED light source all is electrically connected with input voltage; The other end of above-mentioned red light emitting diodes light source is electrically connected with an end of first current-limiting resistance, the other end of above-mentioned green LED light source is electrically connected with an end of second current-limiting resistance, and the other end of above-mentioned blue LED light source is electrically connected with an end of the 3rd current-limiting resistance; The other end of above-mentioned first current-limiting resistance, second current-limiting resistance and the 3rd current-limiting resistance is electrically connected with the signal output part of backlight switch circuit respectively.
As first kind of preferred structure of the present utility model, described red light emitting diodes light source is by a red light emitting diodes (Light-Emitting Diode, LED) constitute, one end of red light emitting diodes is electrically connected with input voltage, and the other end of red light emitting diodes is electrically connected with an end of first current-limiting resistance; Described green LED light source is made of a green LED, and an end of green LED is electrically connected with input voltage, and the other end of green LED is electrically connected with an end of second current-limiting resistance; Described blue LED light source is made of a blue LED, and an end of blue LED is electrically connected with input voltage, and the other end of blue LED is electrically connected with an end of the 3rd current-limiting resistance.
As second kind of preferred structure of the present utility model, described red light emitting diodes light source is made of two or more red light emitting diodes, above-mentioned red light emitting diodes is connected in series and constitutes the red light emitting diodes series circuit, one end of above-mentioned red light emitting diodes series circuit is electrically connected with input voltage, and the other end of red light emitting diodes series circuit is electrically connected with an end of first current-limiting resistance; Described green LED light source is made of two or more green LEDs, above-mentioned green LED is connected in series and constitutes the green LED series circuit, one end of above-mentioned green LED series circuit is electrically connected with input voltage, and the other end of green LED series circuit is electrically connected with an end of second current-limiting resistance; Described blue LED light source is made of two or more blue LEDs, above-mentioned blue LED is connected in series and constitutes the blue LED series circuit, one end of above-mentioned blue LED series circuit is electrically connected with input voltage, and the other end of blue LED series circuit is electrically connected with an end of the 3rd current-limiting resistance.
As the third preferred structure of the present utility model, described red light emitting diodes light source is made of two or more red light emitting diodes, above-mentioned red light emitting diodes is connected in parallel and constitutes the red light emitting diodes parallel circuit, one end of above-mentioned red light emitting diodes parallel circuit is electrically connected with input voltage, and the other end of red light emitting diodes parallel circuit is electrically connected with an end of first current-limiting resistance; Described green LED light source is made of two or more green LEDs, above-mentioned green LED is connected in parallel and constitutes the green LED parallel circuit, one end of above-mentioned green LED parallel circuit is electrically connected with input voltage, and the other end of green LED parallel circuit is electrically connected with an end of second current-limiting resistance; Described blue LED light source is made of two or more blue LEDs, above-mentioned blue LED is connected in parallel and constitutes the blue LED parallel circuit, one end of above-mentioned blue LED parallel circuit is electrically connected with input voltage, and the other end of blue LED parallel circuit is electrically connected with an end of the 3rd current-limiting resistance.
Described backlight switch circuit comprises the first high frequency field effect transistor, the second high frequency field effect transistor, the 3rd high frequency field effect transistor, first divider resistance, second divider resistance and the 3rd divider resistance, the grid of the above-mentioned first high frequency field effect transistor is electrically connected with the signal output part of driving circuit, the source electrode of the first high frequency field effect transistor is electrically connected with an end of first divider resistance, the other end ground connection of first divider resistance, the drain electrode of the first high frequency field effect transistor is electrically connected with an end of first current-limiting resistance in the above-mentioned RGB LED backlight; The grid of the above-mentioned second high frequency field effect transistor is electrically connected with the signal output part of driving circuit, the source electrode of the second high frequency field effect transistor is electrically connected with an end of second divider resistance, the other end ground connection of second divider resistance, the drain electrode of the second high frequency field effect transistor is electrically connected with an end of second current-limiting resistance in the above-mentioned RGB LED backlight; The grid of above-mentioned the 3rd high frequency field effect transistor is electrically connected with the signal output part of driving circuit, the source electrode of the 3rd high frequency field effect transistor is electrically connected with an end of the 3rd divider resistance, the other end ground connection of the 3rd divider resistance, the drain electrode of the 3rd high frequency field effect transistor is electrically connected with an end of the 3rd current-limiting resistance in the above-mentioned RGB LED backlight.
Above-mentioned backlight switch circuit is by adopting the high frequency field effect transistor, the timing control signal that the response driving circuit transports, RGB LED source in the RGB LED backlight is carried out the control of high speed break-make, red light emitting diodes in the RGB LED source, green LED, the orderly break-make of green LED high speed are shown; Simultaneously, above-mentioned backlight switch circuit carries out dividing potential drop to the RGB LED source respectively by divider resistance, so that input voltage VLED can organize the RGB LED source and offer constant voltage through after the dividing potential drop for each.
Workpiece principle of the present utility model is as follows: adopt the red light emitting diodes light source, the green LED light source, the green LED light source is formed the RGB LED backlight, when showing, driving circuit is given in instruction of central processing unit output, make driving circuit produce synchronous two-way timing control signal, wherein one road timing control signal flows to the backlight switch circuit, make red light emitting diodes light source in the backlight switch circuit timesharing control RGB LED backlight, the green LED light source, the orderly break-make of blue LED light source, like this, the red light emitting diodes light source, the green LED light source, the green LED light source switches according to sequential, collocation is in the LED source demonstration time of all kinds, another road timing control signal synchro control is the switch of colored optical filter display panels not, to control the voltage difference of each pixel, liquid crystal molecule on the pixel can be made corresponding upset under the effect of this voltage difference, thereby synchro control liquid crystal pixel penetrance, timesharing obtains red on display panels, green, blue, utilize the persistence of vision characteristics of human eye again, in a short period of time, the redness that will successively occur at the same point different time, green, blue three kinds of colors stack up, by the colour mixture principle, can obtain required color and brightness, and can be red by adjusting, green, the length of blue three kinds of color time of occurrences and the ratio of brightness, change the color of demonstration, so just, realized the synchronous and accurately collocation of sequential of RGB LED backlight break-make and liquid crystal display, to reach the colorize effect.
The utility model beneficial effect against existing technologies is, owing to adopt the RGB light emitting diode to replace the color that traditional white light backlight shows each pixel, that is to say, colored filter is (red on the spatial axes in colour mixture on the spatial axes, green, blue three sub-pixels colour mixture in) changes into via RGB back light source in LED colour mixture in time (in the scope of human eye vision less than the scope of human eye, red, green, three kinds of color images of blue three sub-pixels switch on time shaft fast, produce the colour mixture effect), so, the utility model need not dispose colored filter, save the cost of colored filter and other the bad cost in the manufacturing process, reduced production cost significantly; Again owing to the conductive process meeting loss backlight energy of colored filter at light, and the utility model need not dispose colored filter, so the utility model backlight power consumption is little, improve the utilization factor of light widely, and the shown color of the utility model is abundanter.Simultaneously, because driving circuit adopts integrated drive electronics, above-mentioned integrated drive electronics is except controlling the display panels, can also export RGB LED backlight control signal and give the backlight switch circuit, orderly break-make with three primary colors lamp in the control RGB LED backlight makes the liquid crystal content the required color of each display pixel of liquid crystal to be set easily according to application demand.Therefore, the utlity model has higher cost performance.
In addition, because the utility model can be realized the color of high color saturation, so its chromaticity range can reach the NTSC standard; And, the utility model can be embedded in integrated drive electronics and backlight switch circuit on the display panels of band RGB LED backlight, help the microminiaturization of structure, simultaneously, external interface of the present utility model can be simplified the LCM module compatibility with routine, simplify the difficulty of external control, can realize the upgrading of client product fast.
Below in conjunction with the drawings and specific embodiments the utility model is described further.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model preferred embodiment;
Fig. 2 is the circuit diagram of backlight assembly in the utility model preferred embodiment;
Fig. 3 is the timing control signal and the display panels display synchronization sequential synoptic diagram of RGB LED backlight in the utility model preferred embodiment.
Embodiment
As shown in Figure 1, RGB backlight type Color Liquid Crystal Display assembly in this preferred embodiment, comprise display panels 1, RGB LED backlight 4,, backlight switch circuit 5, integrated drive electronics 2 and central processing unit 3, above-mentioned integrated drive electronics 2 adopts COG to be bundled on the display panels 1; The signal output part of above-mentioned central processing unit 3 is electrically connected with the signal input part of integrated drive electronics 2, the signal output part of above-mentioned integrated drive electronics 2 is electrically connected with the pixel electrode of display panels 1 and the signal input part of backlight switch circuit 5 respectively, the signal output part of backlight switch circuit 5 is electrically connected with RGB LED backlight 4, and above-mentioned RGB LED backlight 4 directly cooperates with display panels 1 light transmission and need not to dispose colored filter.Above-mentioned central processing unit 3 is a prior art, is not described in any further at this, and central processing unit 3 is preferably by flexible circuit board FPC (or printing board PCB) and integrated drive electronics 2 mutual communications.
As shown in Figure 2, above-mentioned RGB light emitting diode is carried on the back 4 light and is comprised red light emitting diodes light source, green LED light source, blue LED light source, the first current-limiting resistance R
11, the second current-limiting resistance R
12With the 3rd current-limiting resistance R
13, above-mentioned red light emitting diodes light source is by two red light emitting diodes LED
11, LED
12Constitute above-mentioned red light emitting diodes LED
11, LED
12Be connected in series and constitute the red light emitting diodes series circuit, an end of above-mentioned red light emitting diodes series circuit is electrically connected with input voltage VLED, the other end of red light emitting diodes series circuit and the first current-limiting resistance R
11An end be electrically connected; Above-mentioned green LED light source is by two green LED LED
21, LED
22Constitute above-mentioned green LED LED
21, LED
22Be connected in series and constitute the green LED series circuit, an end of above-mentioned green LED series circuit is electrically connected with input voltage VLED, the other end of green LED series circuit and the second current-limiting resistance R
12An end be electrically connected; Above-mentioned blue LED light source is by two blue LED LED
31, LED
32Constitute above-mentioned blue LED LED
31, LED
32Be connected in series and constitute the blue LED series circuit, an end of above-mentioned blue LED series circuit is electrically connected with input voltage VLED, the other end of blue LED series circuit and the 3rd current-limiting resistance R
13An end be electrically connected.Above-mentioned red light emitting diodes light source, green LED light source, blue LED light source also can be formed in parallel by two light emitting diodes respectively.
As shown in Figure 2, above-mentioned backlight switch circuit 5 comprises the first high frequency field effect transistor Q
1, the second high frequency field effect transistor Q
2, the 3rd high frequency field effect transistor Q
3, the first divider resistance R
1, the second divider resistance R
2With the 3rd divider resistance R
3, the above-mentioned first high frequency field effect transistor Q
1Grid G be electrically connected the first high frequency field effect transistor Q with the signal output part of integrated drive electronics 2
1The source S and the first divider resistance R
1An end be electrically connected the first divider resistance R
1Other end ground connection, the first high frequency field effect transistor Q
1Drain D and above-mentioned RGB LED backlight 4 in the first current-limiting resistance R
11The other end be electrically connected; The above-mentioned second high frequency field effect transistor Q
2Grid G be electrically connected the second high frequency field effect transistor Q with the signal output part of integrated drive electronics 2
2The source S and the second divider resistance R
2An end be electrically connected the second divider resistance R
2Other end ground connection, the second high frequency field effect transistor Q
2Drain D and above-mentioned RGB LED backlight 4 in the second current-limiting resistance R
12The other end be electrically connected; Above-mentioned the 3rd high frequency field effect transistor Q
3Grid G be electrically connected the 3rd high frequency field effect transistor Q with the signal output part of integrated drive electronics 2
3Source S and the 3rd divider resistance R
3An end be electrically connected the 3rd divider resistance R
3Other end ground connection, the 3rd high frequency field effect transistor Q
3Drain D and above-mentioned RGB LED backlight 4 in the 3rd current-limiting resistance R
13An end be electrically connected.
Above-mentioned backlight switch circuit 5 is by adopting high frequency field effect transistor Q
1, Q
2, Q
3, the timing control signal that response integrated drive electronics 2 transports carries out the control of high speed break-make to RGB LED source in the RGB LED backlight 4, makes red light emitting diodes LED in the RGB LED source
11, LED
12, green LED LED
21, LED
22, green LED LED
31, LED
32The orderly break-make of high speed shows; Simultaneously, above-mentioned backlight switch circuit 5 is by divider resistance R
1, R
2, R
3Input voltage VLED respectively the RGB LED source carried out dividing potential drop, so that can organize the RGB LED source and offer constant voltage through after the dividing potential drop for each.
As shown in Figure 3, Fig. 3 is the timing control signal and the display panels display synchronization sequential synoptic diagram of RGB LED backlight.In Fig. 3, transverse axis express time t, RGB LED backlight timing control signal is a square wave, and the top of square wave is 1, and the expression light emitting diode is lighted, and the bottom of square wave is 0, the expression light emitting diode extinguishes; The waveform of each pixel represents that the transmitance that this pixel is presented changes waveform under the driving voltage effect, ON is that liquid crystal is opened, and light can see through; OFF is that liquid crystal is closed, and light is blocked can not be seen through; The cycle of RGB light emitting diode alternating sequence electrified light emitting is referred to as frame frequency or a two field picture shows time T, each two field picture demonstration time is divided into 3 subframes, one two field picture shows that time T can be provided with according to the real response speed (frequency) of LCD (LCD), in order to make human eye can not differentiate the flicker of display image, frame frequency is usually to be not less than 50HZ.
When showing, integrated drive electronics 2 is given in instruction of central processing unit 3 outputs, make integrated drive electronics 2 produce synchronous two-way timing control signal, wherein one road timing control signal flows to backlight switch circuit 5, makes red light emitting diodes LED in the backlight switch circuit 5 timesharing control RGB LED backlight 4
11, LED
12, green LED LED
21, LED
22, green LED LED
31, LED
32Orderly break-make, like this, red light emitting diodes LED
11, LED
12, green LED LED
21, LED
22, green LED LED
31, LED
32Switch according to sequential, collocation is in the LED source demonstration time of all kinds, another road timing control signal synchro control is the switch of colored optical filter display panels 1 not, to control the voltage difference of each pixel, liquid crystal molecule on the pixel can be made corresponding upset under the effect of this voltage difference, thereby synchro control liquid crystal pixel penetrance, timesharing obtains red on display panels 1, green, blue, utilize the persistence of vision characteristics of human eye again, in a short period of time, the redness that will successively occur at the same point different time, green, blue three kinds of colors stack up, by the colour mixture principle, can obtain required color and brightness, and can be red by adjusting, green, the length of blue three kinds of color time of occurrences and the ratio of brightness, change the color of demonstration, realized that so just the sequential of RGB LED backlight break-make and liquid crystal display is arranged in pairs or groups synchronously and accurately, to reach the colorize effect.
For example, show time T at a two field picture
1In, red light emitting diodes is backlight at T
13 subframes in timing control signal be 100, green LED is backlight at T
13 subframes in timing control signal be 010, blue LED is backlight at T
13 subframes in timing control signal be 001; Pixel 1 is at T
13 subframes in the switch control procedure be ON (opening) → ON (opening) → ON (opening), therefore, pixel 1 shows time T at a two field picture
1Interior display white; Pixel 2 is at T
13 subframes in the switch control procedure be ON (opening) → ON (opening) → OFF (passs), therefore, pixel 2 is in two field picture demonstration time T
1The interior yellow that shows; Pixel 3 is at T
13 subframes in the switch control procedure be ON (opening) → OFF (passs) → OFF (pass), therefore, pixel 3 is in two field picture demonstration time T
1The interior redness that shows; Pixel 4 is at T
13 subframes in the switch control procedure be OFF (passs) → OFF (pass) → OFF (pass), therefore, pixel 4 is in two field picture demonstration time T
1The interior black that shows.
Claims (8)
1, a kind of RGB backlight type Color Liquid Crystal Display assembly comprises display panels, backlight, backlight switch circuit, driving circuit and central processing unit, it is characterized in that: above-mentioned employing RGB LED backlight backlight; The signal output part of above-mentioned central processing unit is electrically connected with the signal input part of driving circuit, the signal output part of above-mentioned driving circuit is electrically connected with the pixel electrode of display panels and the signal input part of backlight switch circuit respectively, the signal output part of above-mentioned backlight switch circuit is electrically connected with the RGB LED backlight, and above-mentioned RGB LED backlight directly cooperates with the display panels light transmission.
2, RGB backlight type Color Liquid Crystal Display assembly as claimed in claim 1 is characterized in that: described driving circuit adopts integrated drive electronics.
3, RGB backlight type Color Liquid Crystal Display assembly as claimed in claim 2 is characterized in that: described integrated drive electronics adopts COG to be bundled on the display panels.
4, RGB backlight type Color Liquid Crystal Display assembly as claimed in claim 1, it is characterized in that: described RGB LED backlight comprises red light emitting diodes light source, green LED light source, blue LED light source, first current-limiting resistance, second current-limiting resistance and the 3rd current-limiting resistance, and an end of above-mentioned red light emitting diodes light source, green LED light source and blue LED light source all is electrically connected with input voltage; The other end of above-mentioned red light emitting diodes light source is electrically connected with an end of first current-limiting resistance, the other end of above-mentioned green LED light source is electrically connected with an end of second current-limiting resistance, and the other end of above-mentioned blue LED light source is electrically connected with an end of the 3rd current-limiting resistance; The other end of above-mentioned first current-limiting resistance, second current-limiting resistance and the 3rd current-limiting resistance is electrically connected with the signal output part of backlight switch circuit respectively.
5, RGB backlight type Color Liquid Crystal Display assembly as claimed in claim 4, it is characterized in that: described red light emitting diodes light source is made of a red light emitting diodes, one end of red light emitting diodes is electrically connected with input voltage, and the other end of red light emitting diodes is electrically connected with an end of first current-limiting resistance; Described green LED light source is made of a green LED, and an end of green LED is electrically connected with input voltage, and the other end of green LED is electrically connected with an end of second current-limiting resistance; Described blue LED light source is made of a blue LED, and an end of blue LED is electrically connected with input voltage, and the other end of blue LED is electrically connected with an end of the 3rd current-limiting resistance.
6, RGB backlight type Color Liquid Crystal Display assembly as claimed in claim 4, it is characterized in that: described red light emitting diodes light source is made of two or more red light emitting diodes, above-mentioned red light emitting diodes is connected in series and constitutes the red light emitting diodes series circuit, one end of above-mentioned red light emitting diodes series circuit is electrically connected with input voltage, and the other end of red light emitting diodes series circuit is electrically connected with an end of first current-limiting resistance; Described green LED light source is made of two or more green LEDs, above-mentioned green LED is connected in series and constitutes the green LED series circuit, one end of above-mentioned green LED series circuit is electrically connected with input voltage, and the other end of green LED series circuit is electrically connected with an end of second current-limiting resistance; Described blue LED light source is made of two or more blue LEDs, above-mentioned blue LED is connected in series and constitutes the blue LED series circuit, one end of above-mentioned blue LED series circuit is electrically connected with input voltage, and the other end of blue LED series circuit is electrically connected with an end of the 3rd current-limiting resistance.
7, RGB backlight type Color Liquid Crystal Display assembly as claimed in claim 4, it is characterized in that: described red light emitting diodes light source is made of two or more red light emitting diodes, above-mentioned red light emitting diodes is connected in parallel and constitutes the red light emitting diodes parallel circuit, one end of above-mentioned red light emitting diodes parallel circuit is electrically connected with input voltage, and the other end of red light emitting diodes parallel circuit is electrically connected with an end of first current-limiting resistance; Described green LED light source is made of two or more green LEDs, above-mentioned green LED is connected in parallel and constitutes the green LED parallel circuit, one end of above-mentioned green LED parallel circuit is electrically connected with input voltage, and the other end of green LED parallel circuit is electrically connected with an end of second current-limiting resistance; Described blue LED light source is made of two or more blue LEDs, above-mentioned blue LED is connected in parallel and constitutes the blue LED parallel circuit, one end of above-mentioned blue LED parallel circuit is electrically connected with input voltage, and the other end of blue LED parallel circuit is electrically connected with an end of the 3rd current-limiting resistance.
8, as each described RGB backlight type Color Liquid Crystal Display assembly in the claim 4 to 7, it is characterized in that: described backlight switch circuit comprises the first high frequency field effect transistor, the second high frequency field effect transistor, the 3rd high frequency field effect transistor, first divider resistance, second divider resistance and the 3rd divider resistance, the grid of the above-mentioned first high frequency field effect transistor is electrically connected with the signal output part of driving circuit, the source electrode of the first high frequency field effect transistor is electrically connected with an end of first divider resistance, the other end ground connection of first divider resistance, the drain electrode of the first high frequency field effect transistor is electrically connected with an end of first current-limiting resistance in the above-mentioned RGB LED backlight; The grid of the above-mentioned second high frequency field effect transistor is electrically connected with the signal output part of driving circuit, the source electrode of the second high frequency field effect transistor is electrically connected with an end of second divider resistance, the other end ground connection of second divider resistance, the drain electrode of the second high frequency field effect transistor is electrically connected with an end of second current-limiting resistance in the above-mentioned RGB LED backlight; The grid of above-mentioned the 3rd high frequency field effect transistor is electrically connected with the signal output part of driving circuit, the source electrode of the 3rd high frequency field effect transistor is electrically connected with an end of the 3rd divider resistance, the other end ground connection of the 3rd divider resistance, the drain electrode of the 3rd high frequency field effect transistor is electrically connected with an end of the 3rd current-limiting resistance in the above-mentioned RGB LED backlight.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920009260XU CN201369152Y (en) | 2009-03-21 | 2009-03-21 | RGB backlight type color liquid crystal display component |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200920009260XU CN201369152Y (en) | 2009-03-21 | 2009-03-21 | RGB backlight type color liquid crystal display component |
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| CN201369152Y true CN201369152Y (en) | 2009-12-23 |
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| CNU200920009260XU Expired - Fee Related CN201369152Y (en) | 2009-03-21 | 2009-03-21 | RGB backlight type color liquid crystal display component |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102955270A (en) * | 2011-08-30 | 2013-03-06 | 昆山顺景光电有限公司 | COG (chip on glass) liquid crystal display module with Chinese character library |
| CN103514838A (en) * | 2012-06-29 | 2014-01-15 | 施耐德电器工业公司 | Device and method for realizing multi-color backlight by means of two-line transmission diving method |
| CN104700804A (en) * | 2015-03-25 | 2015-06-10 | 广东威创视讯科技股份有限公司 | COG (Chip On Glass) liquid crystal display device, display control device and display system |
| CN109658843A (en) * | 2018-12-28 | 2019-04-19 | 郴州市晶讯光电有限公司 | A kind of display device that multicolored icon is shown |
| US10629168B2 (en) | 2018-05-21 | 2020-04-21 | Au Optronics Corporation | Display control method and display system |
| CN111538181A (en) * | 2020-06-05 | 2020-08-14 | 京东方科技集团股份有限公司 | Electronic device and driving method thereof |
| CN113035141A (en) * | 2021-03-19 | 2021-06-25 | 维沃移动通信有限公司 | Display screen, display screen driving method and device, electronic equipment and storage medium |
| CN113035140A (en) * | 2021-03-19 | 2021-06-25 | 维沃移动通信有限公司 | Display screen driving method and device, electronic equipment and storage medium |
| US11112647B2 (en) | 2018-11-02 | 2021-09-07 | Xiamen Tianma Micro-Electronics Co., Ltd. | Display device, driving method and electronic apparatus |
| CN114005413A (en) * | 2020-07-28 | 2022-02-01 | 京东方科技集团股份有限公司 | Backlight driving circuit, driving method thereof and backlight module |
| CN114694602A (en) * | 2022-04-14 | 2022-07-01 | 广州华星光电半导体显示技术有限公司 | Backlight driving method of liquid crystal display device and liquid crystal display device |
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2009
- 2009-03-21 CN CNU200920009260XU patent/CN201369152Y/en not_active Expired - Fee Related
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| CN102955270A (en) * | 2011-08-30 | 2013-03-06 | 昆山顺景光电有限公司 | COG (chip on glass) liquid crystal display module with Chinese character library |
| CN103514838A (en) * | 2012-06-29 | 2014-01-15 | 施耐德电器工业公司 | Device and method for realizing multi-color backlight by means of two-line transmission diving method |
| CN103514838B (en) * | 2012-06-29 | 2016-12-21 | 施耐德电器工业公司 | The apparatus and method of multicolor backlight are realized by two wires transmission driving method |
| CN104700804A (en) * | 2015-03-25 | 2015-06-10 | 广东威创视讯科技股份有限公司 | COG (Chip On Glass) liquid crystal display device, display control device and display system |
| CN104700804B (en) * | 2015-03-25 | 2018-07-10 | 广东威创视讯科技股份有限公司 | A kind of COG liquid crystal display devices, display control unit and display system |
| US10629168B2 (en) | 2018-05-21 | 2020-04-21 | Au Optronics Corporation | Display control method and display system |
| US11112647B2 (en) | 2018-11-02 | 2021-09-07 | Xiamen Tianma Micro-Electronics Co., Ltd. | Display device, driving method and electronic apparatus |
| CN109658843A (en) * | 2018-12-28 | 2019-04-19 | 郴州市晶讯光电有限公司 | A kind of display device that multicolored icon is shown |
| CN111538181A (en) * | 2020-06-05 | 2020-08-14 | 京东方科技集团股份有限公司 | Electronic device and driving method thereof |
| CN114005413A (en) * | 2020-07-28 | 2022-02-01 | 京东方科技集团股份有限公司 | Backlight driving circuit, driving method thereof and backlight module |
| CN113035141A (en) * | 2021-03-19 | 2021-06-25 | 维沃移动通信有限公司 | Display screen, display screen driving method and device, electronic equipment and storage medium |
| CN113035140A (en) * | 2021-03-19 | 2021-06-25 | 维沃移动通信有限公司 | Display screen driving method and device, electronic equipment and storage medium |
| CN114694602A (en) * | 2022-04-14 | 2022-07-01 | 广州华星光电半导体显示技术有限公司 | Backlight driving method of liquid crystal display device and liquid crystal display device |
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