CN101707031B - LED TV display panel device - Google Patents
LED TV display panel device Download PDFInfo
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- CN101707031B CN101707031B CN2009102500114A CN200910250011A CN101707031B CN 101707031 B CN101707031 B CN 101707031B CN 2009102500114 A CN2009102500114 A CN 2009102500114A CN 200910250011 A CN200910250011 A CN 200910250011A CN 101707031 B CN101707031 B CN 101707031B
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Abstract
The invention relates to an LED TV display panel device which improves the brightness and the color rendition degree of a TV display image by adopting an LED self-illumination display panel. The LED TV display panel device is characterized by comprising a display panel and a display control circuit, wherein the display panel comprises a plurality of luminescence units arranged in a matrix way, each luminescence unit forms a group of light emitting diode matrix by M line*N rows pixels, each pixel at least comprises a red light emitting diode, a green light emitting diode and a blue light emitting diode, the density of the pixels is above 1.1 million points per square meter; in the LED matrix of the luminescence units, anodes of the LEDs in the same line are connected together and are electrically connected with the display control circuit through a control power switch, the control circuit controls the connection and the disconnection of the control power switch tube to form an LED anode control circuit; and cathodes of the LEDs with same color in the same row are connected together and are electrically connected with a cathode display control circuit through a constant current drive device to form an LED cathode control circuit.
Description
Technical field
The invention belongs to LED TV display panel device field, especially a kind of through employing LED light-emitting display panel, thus the LED TV display panel device of raising TV luminance of display images and color rendition degree.
Background technology
Display panel is a vitals of TV; Present state-of-the-art television product is the LCD liquid crystal TV set; LED-backlit salable source televisor etc. all belongs to the category of LCD LCD TV on the domestic and international market, and its display screen adopts LED display and LCD display double-decker.
The LCD panel is because its structure, and have following deficiency: 1, brightness is not enough, and 2, the LCD response time is long; 3, the LCD color rendition is not enough, and 4, there is the picture conditions of streaking in the LCD panel, and LED (LightEmitting Diode); Light emitting diode is called for short LED; Be a kind of solid-state semiconductor devices that can electric energy be converted into visible light, it can directly be converted into light to electricity.Can realize high brightness, high-contrast, high reduction degree shows, and eliminates the conditions of streaking of picture.
Though the LED screen of TV set of the extensive understanding of consumer still is a liquid crystal panel now; Just there is the LED-backlit module to substitute the traditional backlight source; Only be the conversion of backlight, but, therefore can promote the colour gamut value of LCD TV significantly owing to have benefited from the excellent characteristic of led light source; Make LCD TV under lower power consumption, realize higher brightness and color saturation, and animate power.Well imagine that if TV display panel adopts the LED technology, that will become the new direction of following TV development.
Summary of the invention
The purpose of this invention is to provide a kind of through adopting the LED light-emitting display panel, thereby improve the LED TV display panel device of TV luminance of display images and color rendition degree.
Technical scheme of the present invention is: the LED TV display panel device; It is characterized in that being made up of display panel and display control circuit, said display panel is made up of a plurality of luminescence units that are provided with through arranged, and each luminescence unit is formed one group of dot matrix LEDs by the capable pixel of M row * N; Each pixel comprises each one of rgb led at least; Picture element density is every square metre more than 110,000, in the dot matrix LEDs of luminescence unit, links together with the anode of the light emitting diode of delegation; Be connected with display control circuit through the power controlling switching tube; The conducting and the shutoff of control circuit power controlling switching tube form the light emitting diode anode control circuit, and the negative electrode of the homochromy light emitting diode of same row links together; Be connected with the negative electrode display control circuit through constant current driving device, form the light emitting diode cathode control circuit.
Said control circuit is installed on the pcb board of LED display device; When using the power switch pipe that shows in the diode anode control circuit to lead to as the cycle wheel conductance with T; Each exports pairing ON time and controls the brightness of rgb led in each pixel in the dot matrix LEDs negative electrode display control circuit through the control constant current driving device; The different brightness of rgb led has been combined to form the various gray scales of display image in each pixel; Through this principle, realize showing television image as TV display panel with the LED luminescent material.。
Described display control circuit is FPGA or CPLD chip structure.
Effect of the present invention is: the LED TV display panel device; Be made up of display panel and display control circuit, display panel is made up of a plurality of luminescence units that are provided with through arranged, and each luminescence unit is formed one group of dot matrix LEDs by the capable pixel of M row * N; Each pixel comprises each one of rgb led at least; Picture element density is every square metre more than 110,000, in the dot matrix LEDs of luminescence unit, links together with the anode of homochromy (but comprising non-homochromy) light emitting diode of delegation; Be connected with display control circuit through the power controlling switching tube; The conducting and the shutoff of control circuit power controlling switching tube form the light emitting diode anode control circuit, and the negative electrode of the homochromy light emitting diode of same row links together; Be connected with the negative electrode display control circuit through constant current driving device, form the light emitting diode cathode control circuit.Can solve that the LED televisor is not the problem of truly " LED televisor " in the prior art, realize LED televisor by the LED direct imaging.
LED (Light Emitting Diode), light emitting diode is called for short LED,, be a kind of solid-state semiconductor devices that can electric energy be converted into visible light, it can directly be converted into light to electricity.The heart of LED is a semi-conductive wafer, and an end of wafer is attached on the support, and an end is a negative pole, and the positive pole that the other end connects power supply makes entire wafer by epoxy encapsulation.Semiconductor wafer is made up of two parts, and a part is a P-type semiconductor, occupies an leading position in its hole, the inside, and the other end is a N-type semiconductor, mainly is electronics here.But when these two kinds of semiconductors couple together, just form one " P-N knot " between them.When electric current acted on this wafer through lead, electronics will be pushed to the P district, and electronics will send energy with the form of photon, the luminous principle of LED that Here it is then with hole-recombination in the P district.And the light wavelength color of light just is by the material decision that forms the P-N knot.
Colored LED display curtain is formed a pixel with three LED pipes of R/G/B; Brightness through controlling each pixel changes; Realize the display mode of image; And present so-called LED televisor only has been to use LED to illuminate the LCD LCD TV of screen, and it can have two modes to reach this purpose: change the whole back side of display screen into LED (so-called " directly backlight down "), or put LED (so-called " sidelight ") at periphery.TV market competition of today is fierce day by day, and the market of LCD TV reaches the perfervid stage especially, and differential competition becomes the brand-new development strategy of each enterprise.Though the LED screen of TV set of the extensive understanding of consumer still is a liquid crystal panel now; Just there is the LED-backlit module to substitute the traditional backlight source; Only be the conversion of backlight, but, can have promoted the colour gamut value of LCD TV significantly owing to have benefited from the excellent characteristic of led light source; Be that LCD TV is realized higher brightness and color saturation under lower power consumption, and animate power.Well imagine that if TV display panel adopts the LED technology, that will become the new direction of following TV development.
The internal characteristics of LED has determined that at first, volume is little with its advantage as TV display panel, and LED is that a very little wafer is encapsulated in epoxy resin the inside basically, thus its very little, very light; Secondly, the low LED power consumption of power consumption is very low, and in general the WV of LED is 2-3.6V, and working current is 0.02-0.03A, and in other words: the electricity that it consumes is no more than 0.1W; The 3rd, long service life, under appropriate electric current and voltage, can reach 100,000 hours the serviceable life of LED; The 4th, high brightness, low in calories is than HID or incandescent lamp heat radiation still less; The 5th, environmental protection, LED is made by nontoxic material, and containing mercury unlike fluorescent light can pollute, and simultaneously LED also can recycling; The 6th, sturdy and durable, LED is encapsulated in the epoxy resin the inside completely, does not also have loosening part in the lamp body, and it is non-damageable that these characteristics make that LED can be described as; At last, controllability is strong, and self-luminescent material need not used backlight, and the visual angle is wide simultaneously, image quality is even, reaction velocity is fast, brightness is high, rich color.
Below in conjunction with accompanying drawing and embodiment the present invention is done further explanation.
Description of drawings
Fig. 1 is a circuit block diagram of the present invention;
Fig. 2 is the power supply output pin signal waveforms under the group control of one of Z group anodic control signal among Fig. 1;
Fig. 3 is the lattice luminous matrix circuit schematic diagram of M*N;
Embodiment
Among Fig. 1, the LED TV display panel device is made up of display panel and display control circuit; Said display panel is made up of a plurality of luminescence units that are provided with through arranged; Each luminescence unit is formed one group of dot matrix LEDs by the capable pixel of M row * N, and each pixel comprises each one of rgb led at least, and picture element density is every square metre more than 110,000; In the dot matrix LEDs of luminescence unit; Anode with homochromy (but comprising non-homochromy) light emitting diode of delegation links together, and is connected the conducting and the shutoff of control circuit power controlling switching tube with display control circuit through the power controlling switching tube; Form the light emitting diode anode control circuit; The negative electrode of the homochromy light emitting diode of same row links together, and is connected with the negative electrode display control circuit through constant current driving device, forms light emitting diode cathode control circuit (referring to Fig. 3).
Fig. 2 is the power supply output pin signal waveforms under the group control of one of Z group anodic control signal among Fig. 1.
Control circuit is installed on the pcb board of LED display device; When using the power switch pipe that shows in the diode anode control circuit to lead to as the cycle wheel conductance with T; Each exports pairing ON time and controls the brightness of rgb led in each pixel in the dot matrix LEDs negative electrode display control circuit through the control constant current driving device; The different brightness of rgb led has been combined to form the various gray scales of display image in each pixel; Through this principle, realize showing television image as TV display panel with the LED luminescent material.Display control circuit is the fpga chip structure.
Claims (3)
1.LED TV display panel device is characterized in that being made up of display panel and display control circuit, said display panel is made up of a plurality of luminescence units that are provided with through arranged; Each luminescence unit is formed one group of dot matrix LEDs by the capable pixel of M row * N, and each pixel comprises each one of rgb led at least, and picture element density is every square metre more than 110,000; In the dot matrix LEDs of luminescence unit; Anode with the light emitting diode of delegation links together, and is connected the conducting and the shutoff of control circuit power controlling switching tube with display control circuit through the power controlling switching tube; Form the light emitting diode anode control circuit; The negative electrode of the homochromy light emitting diode of same row links together, and is connected with the negative electrode display control circuit through constant current driving device, forms the light emitting diode cathode control circuit; Wherein, said control circuit is installed on the pcb board of said LED display device.
2. LED TV set panel device according to claim 1; When it is characterized in that using the power switch pipe that shows in the diode anode control circuit to lead to as the cycle wheel conductance with T; Each exports pairing ON time and controls the brightness of rgb led in each pixel in the dot matrix LEDs negative electrode display control circuit through the control constant current driving device, and the different brightness of rgb led has been combined to form the various gray scales of display image in each pixel.
3. LED TV set panel device according to claim 1 and 2 is characterized in that described display control circuit is FPGA or CPLD chip structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102500114A CN101707031B (en) | 2009-12-01 | 2009-12-01 | LED TV display panel device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009102500114A CN101707031B (en) | 2009-12-01 | 2009-12-01 | LED TV display panel device |
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| Publication Number | Publication Date |
|---|---|
| CN101707031A CN101707031A (en) | 2010-05-12 |
| CN101707031B true CN101707031B (en) | 2012-05-02 |
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| CN2009102500114A Active CN101707031B (en) | 2009-12-01 | 2009-12-01 | LED TV display panel device |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931330A (en) * | 2012-11-12 | 2013-02-13 | 中国科学院半导体研究所 | Preparation method of LED (light-emitting diode) flat-panel display unit |
| CN103857106B (en) * | 2012-11-29 | 2016-05-18 | 利亚德光电股份有限公司 | Led drive circuit and control system |
| CN103854598B (en) * | 2012-11-29 | 2016-08-10 | 利亚德光电股份有限公司 | Light-emitting diode display |
| CN103854596A (en) * | 2012-11-29 | 2014-06-11 | 利亚德光电股份有限公司 | Led display |
| CN106575998B (en) * | 2014-12-19 | 2019-12-20 | 松下电器（美国）知识产权公司 | Transmission method, transmission device, and program |
| CN105006220A (en) * | 2015-08-06 | 2015-10-28 | 利亚德光电股份有限公司 | Control system of LED display screen, television set, and display control system |
| CN109950232B (en) * | 2019-02-15 | 2021-11-05 | 华灿光电(苏州）有限公司 | Light emitting diode display panel |
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