CN100392477C - Liquid crystal display panel resource processing method - Google Patents
Liquid crystal display panel resource processing method Download PDFInfo
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- CN100392477C CN100392477C CNB2006100882784A CN200610088278A CN100392477C CN 100392477 C CN100392477 C CN 100392477C CN B2006100882784 A CNB2006100882784 A CN B2006100882784A CN 200610088278 A CN200610088278 A CN 200610088278A CN 100392477 C CN100392477 C CN 100392477C
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- 239000003960 organic solvent Substances 0.000 claims abstract description 17
- 229910052738 indium Inorganic materials 0.000 claims abstract description 16
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 13
- 239000003822 epoxy resin Substances 0.000 claims abstract description 8
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 8
- 238000007598 dipping method Methods 0.000 claims abstract description 6
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- 238000007670 refining Methods 0.000 claims abstract 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Inorganic materials [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 30
- 229910052751 metal Inorganic materials 0.000 claims description 20
- 239000002184 metal Substances 0.000 claims description 20
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 14
- 238000005516 engineering process Methods 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 13
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 12
- 238000002386 leaching Methods 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 11
- 229910017604 nitric acid Inorganic materials 0.000 claims description 11
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 8
- 238000002791 soaking Methods 0.000 claims description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 7
- 239000012530 fluid Substances 0.000 claims description 7
- 150000007522 mineralic acids Chemical class 0.000 claims description 7
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- 238000006243 chemical reaction Methods 0.000 description 11
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
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- OANVFVBYPNXRLD-UHFFFAOYSA-M propyromazine bromide Chemical compound [Br-].C12=CC=CC=C2SC2=CC=CC=C2N1C(=O)C(C)[N+]1(C)CCCC1 OANVFVBYPNXRLD-UHFFFAOYSA-M 0.000 description 2
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- 238000010438 heat treatment Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical group [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
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- Processing Of Solid Wastes (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The method includes following steps: using manual work or dipping LCD faceplate in solvent to remove polarized light film; using cutting method or dipping faceplate in acid liquor to remove sealing epoxy resin to open up two pieces of base plate of LCD faceplate in glass; dipping faceplate in organic solvent to remove liquid crystal; after cleaning glass base plate, and dipping the base plate to acid leach liquor to remove metallized plating film so as to obtain clean glass base plate; picking up and refining indium from acid leach liquor. The invention carries out innocent treatment for worn-out LCD faceplates, and recovers resources.
Description
Technical field
The present invention relates to a kind of resource recovery process, relate to a kind of recycling processing method of display panels specifically.
Background technology
Display also becomes the main object of recovery technology research as the important accessory of computer.The display that uses has two kinds at present: cathode-ray tube display (Cathode Ray Tubes is called for short CRT) and LCD (Liquid CrystalDisplay is called for short LCD).Compare with cathode-ray tube display, LCD has many advantages: plane shows, volume is little, in light weight, low in energy consumption, driving voltage is low, available large scale integrated circuit directly drives, can under bright light environments, show, the most important thing is that it does not contain harmful ray, can or not be detrimental to health because of the radiation contaminated environment.Though, in the present display popular on market, cathode-ray tube display has still accounted for leading position, but there are data to show, along with the decline of LCD price and the maturation of technology, its market scale enlarges constantly, liquid crystal display applications has been become a kind of trend and the trend of international computer industry development to the desktop computer.Under these circumstances, stature approaches little LCD, becomes the standard display device of desktop computer with substituting conventional CRT monitor, has been a undisputable fact.Moreover, LCD also is widely used on notebook computer, digital camera, mobile phone and other electronics audio-visual productss, and manifests the advantage of not replacing.Advocate the epoch of health, environmental protection at this, people also constantly deepen the degree of concern of LCD.The data recent according to portion shows, in February, 2005, the whole attention rate in Chinese LCD market increases substantially.Be the cause of long holidays in the Spring Festival on the one hand; On the other hand, the liquid crystal new product emerges in an endless stream, and brands such as ViewSonic, Jijia and Eizo have been released trendy 17 inches and 19 inches LCD in 2005 one after another, and the innovative design of new product has attracted numerous consumers' sight.Recently, LG company has released 102 inches LCD TV again.As seen, LCD is firm to appear, and just comes out top in IT field.
Along with the develop rapidly of science and technology, LCD has obtained using widely with its unrivaled advantage, will replace cathode-ray tube display gradually, becomes the standard display device of desktop computer; It also manifests the advantage of not replacing in the making of electronic products such as digital camera, mobile phone, notebook simultaneously.
A large amount of uses of LCD make it become one of main source current and electron wastes in the future.Yet current display recovery technology is primarily aimed at cathode-ray tube display, and technology comparative maturity.And set foot in fewer to the recovery and the utilization of resources aspect of LCD.In view of the growth momentum that LCD can't stop, the research that LCD is reclaimed is very important.
LCD reclaims technology can roughly be divided into two stages, and the one, to disassembling of liquid crystal cell, the 2nd, the each several part material after disassembling is recycled.Obviously, no matter disassemble or reclaim, except the structure to LCD has sufficient understanding, also must understand the main material of LCD.Employed material was also incomplete same when dissimilar LCD was made.But no matter be the TN type or the LCD of TFT type, all contain these three kinds of main materials of glass, ITO film and liquid crystal.The ITO film, i.e. transparency electrode, its key component is indium oxide and tin oxide.Indium metal is a kind of rare metal, and the abundance in the earth's crust is very low, but it is very wide in the application of electronic information industry.
Application number is that 03109487.2 patent of invention discloses a kind of LCD recycling processing method, insert after this invention breaks the waste liquid crystal display panel and carry out the segmentation heating in the sealed furnace, after handling and separate coatings, catalyst catalytic exhaust gas, plastics pyrolysis coking, stranding mill demoulding make clean glass sheet, separated plated film oxide is recyclable as the colorant adjuvant, and clean glass sheet can be made into various building materials after pulverizing processing carries out resource and utilize.Do not mention the technology of opening of display panels in this patent, the gordian technique that light polarizing film is removed and the rare metal indium extracts.
In sum, lack a kind of technology that LCD can be handled and reclaimed to greatest extent resource now, indium metal has very high recovery value as rare metal in the display panels of LCD.
Summary of the invention
The objective of the invention is to discarded problem, propose the complete resource recovery technology of a cover, realize harmless treatment, also realize that resources effective reclaims simultaneously display panels at LCD.
Purpose of the present invention can reach by following measure:
A kind of liquid crystal display panel resource processing method may further comprise the steps:
A, the complete or broken display panels under will removing remove light polarizing film with the manual method or the method for soaking organic solvent, inorganic acid fluid or alkali lye;
B, the above-mentioned complete removal that obtains the display panels of light polarizing film, or after the frame portion cutting with its sealing-in, open two glass substrates of display panels, or it is soaked with inorganic acid fluid, remove the epoxy resin of sealing-in, after panel cleaned up, open two glass substrates of display panels;
C, the display panels of the fragmentation that obtains among the complete glass substrate that contains liquid crystal that obtains among the step b or the step a is soaked removing the liquid crystal on the glass substrate with organic solvent, and clean up;
D, the glass substrate of the intact liquid crystal of above-mentioned cleaning is soaked with acid leaching liquor, remove metal coating on the glass substrate, obtain clean glass substrate.
For the waste and old LCD that reclaims, comprise the scrap of producing on the lcd productive line, and the LCD of using on the various electronic equipments, the electronic equipment that will contain LCD is disassembled earlier, recycling, display panels then enters method of the present invention and handles.
Purpose of the present invention specifically can reach by following steps:
A, the electronic equipment that will contain LCD are earlier disassembled, and remove components and parts such as printed circuit board (PCB), driving circuit, backlight, light guide plate, and printed circuit board (PCB) etc. can carry out individual processing, and plastic components such as light guide plate can be directly according to the plastics reuse;
B, the display panels of removing are removed light polarizing film earlier, can use organic solvent, as in acetone, chloroform, benzene, toluene or the dimethylbenzene one or more, or inorganic acid fluid, as volume ratio 1: 1～5 nitric acid or sulfuric acid solution with water, perhaps alkali lye is removed as the NaOH or the potassium hydroxide solution immersion of 1: 5000～1: 100 (with the mass ratio of water); General soak time comes off with light polarizing film and is as the criterion, and the organic solvent soak time was generally 3～8 hours, and normal temperature carries out; The acid soak time is 3～8 hours, is heated to 50～90 ℃; The dipping by lye time is 3～8 hours, is heated to 50～90 ℃; Also available manually with the light polarizing film removal, light polarizing film is according to the plastics direct reuse;
C, will remove the display panels after the light polarizing film, use acid solution, nitric acid or sulfuric acid solution as 1: 1～4 (with the volume ratio of water) soak the epoxy resin that sealing-in is removed in the back, reaction time is 2～8 hours, temperature of reaction is 50～90 ℃, after water cleans up liquid crystal panel, two glass substrates of display panels are opened; Also after the frame portion cutting of instrument such as available diamant with sealing-in glass substrate is opened, the frame that cuts down can enter subsequent processing steps together with base plate glass;
D, will contain the glass substrate organic solvent of liquid crystal, as in acetone, chloroform, benzene, toluene or the dimethylbenzene one or more, soak to remove liquid crystal on glass, will clean the glass substrate of liquid crystal, clean the removal organic solvent with ethanol, water cleans and removes ethanol again;
E, when the cleansing power of finding above-mentioned organic solvent descends, the organic solvent that will contain liquid crystal distills regeneration, distills remaining liquid crystal and carries out burning disposal;
F, will clean the glass substrate of liquid crystal, soak,, will remove the glass substrate of metal coating directly as the frit reuse to remove the metals such as ITO film on the glass substrate with acid leaching liquor.Acid leaching liquor is one or more in nitric acid, sulfuric acid or the hydrochloric acid, soaking temperature is 70～90 ℃, and the time is 1～6h, and selection process is divided into following three kinds: the volume ratio of (1) and water is 1: 1～4 salpeter solution, extraction temperature is controlled to be 70～90 ℃, and the reaction time is 1～4h; (2) add sulfuric acid that concentration is 100～600g/L and add manganese dioxide with the consumption of 10g/L according to the volume of sulfuric acid, heated and stirred, the control temperature is about 70～90 ℃, behind reaction 2～4h, add entry, controlling final sulfuric acid concentration is 50g/L, continues reaction 1～2h.(3) according to the proportioning power 5～10 of hydrochloric acid, nitric acid, water: the ratio of 1: 5～10 (volume ratios) is mixed, heated and stirred, control temperature about 70～90 ℃, reaction 1～4h.According to the indium content on the Theoretical Calculation glass substrate only is 0.052%, theoretical sour consumption is very little, in operation to the recycling of the acid of leaching usefulness, in above-mentioned technology, it is excessive that the consumption of acid is generally, and enters follow-up indium-extracting process after leaching efficiency has decline;
G, with the acid leaching liquor that contains indium of above-mentioned leaching, carry out the extraction and the purifying of indium with the existing technology of extracting indium and (roll up editorial board as the metallurgical encyclopaedical editor-in-chief council of China " Non-ferrous Metallurgy ", editorial office of metallurgical industry publishing house " the metallurgical encyclopedia of China " compiles. the metallurgical encyclopaedical Non-ferrous Metallurgy of China. and Beijing: metallurgical industry publishing house, 1998.11);
H, above-mentioned steps are fit to completely do not have broken display panels, if display panels is broken before reclaiming, then can is omitted the C step and are directly entered the D step and operate by steps A, B;
I, above-mentioned steps immersion process can increase stirring operation, to improve the effect of handling.
Glass substrate after the present invention handles can be directly as the frit reuse or as other purposes
The present invention has realized the harmless treatment to waste and old LCD, but also has reclaimed Limited resources, as plastics, electronic component, glass, indium metal etc., has certain economic benefits.Handle effective unification that waste and old LCD has realized economic benefit and environmental benefit by present technique, realized Sustainable utilization of resources, utilize greatly developing of recycling economy.
Embodiment
Embodiment 1:
A, the electronic equipment that will contain display panels are earlier disassembled, and remove components and parts such as printed circuit board (PCB), driving circuit, backlight, light guide plate, and printed circuit board (PCB) etc. can carry out individual processing, and plastic components such as light guide plate can be directly according to the plastics reuse;
B, the display panels of removing are removed light polarizing film earlier, can soak with acetone, and soak time comes off with light polarizing film and is as the criterion, and the organic solvent soak time is 3 hours, and normal temperature carries out;
C, will remove the display panels after the light polarizing film, and under agitation soak the epoxy resin that sealing-in is removed in the back with the salpeter solution of 1: 1 (with the volume ratio of water), the reaction time is 4 hours, 90 ℃ of temperature of reaction.After water cleans up liquid crystal panel, two glass substrates of display panels are opened.
D, the glass substrate that will contain liquid crystal soak to remove liquid crystal on glass with acetone, will clean the glass substrate of liquid crystal, clean with ethanol and remove organic solvent, again water cleaning removal ethanol;
When the cleansing power of E, discovery acetone descended, the acetone that will contain liquid crystal distilled regeneration, distills remaining liquid crystal and carries out burning disposal;
F, will clean the glass substrate of liquid crystal, under agitation use nitric acid dousing,, will remove the glass substrate of metal coating directly as the frit reuse to remove the metals such as ITO film on the glass substrate.Concentration of nitric acid is 1: 4, and extraction temperature is controlled to be 90 ℃, reacts 1 hour.It is excessive that the consumption of acid is generally, and only is 0.052% according to the indium content on the Theoretical Calculation glass substrate, too little with the acid amount.The acid of leaching usefulness in operation can recycle, and enters follow-up indium-extracting process after leaching efficiency has decline.
G, the leachate that contains indium that will leach carry out the extraction and the purifying of indium with having the technology of extracting indium now;
Embodiment 2:
Other conditions are constant, in the step (B) with embodiment 1, use the salpeter solution of 1: 5 (with the volume ratio of water) instead and remove light polarizing film, are heated to 80 ℃ and soak 4 hours; Change into dimethylbenzene in the step (D) and remove liquid crystal; In the step (F), the proportioning that changes into according to hydrochloric acid, nitric acid, water is the solution removal metal coating of 5: 1: 5 (volume ratio), heated and stirred, and the control temperature was reacted 4 hours about 70 ℃.
Embodiment 3:
Other conditions are constant, in the step (B) with embodiment 1, use the sodium hydroxide lye of 1: 100 (with the weight ratio of water) instead and remove light polarizing film, are heated to 80 ℃ and soak 3 hours; In the step (F), the proportioning that changes into according to hydrochloric acid, nitric acid, water is the solution removal metal coating of 7: 1: 9 (volume ratio), heated and stirred, and the control temperature was reacted 3 hours about 80 ℃.
Embodiment 4:
Other conditions are constant, in the step (B) with embodiment 1, use toluene instead and remove light polarizing film, and normal temperature soaked 7 hours down; In the step (C), use the salpeter solution of 1: 2 (with the volume ratio of water) instead and remove epoxy resin, soaked 2 hours down at 70 ℃; The salpeter solution of (with the volume ratio of water) is removed metal coating to change 1: 1 in the step (F), and the control soaking temperature is about 70 ℃, and the time is 4 hours.
Embodiment 5:
Other conditions are constant, in the step (C) with embodiment 1, use the salpeter solution of 1: 4 (with the volume ratio of water) instead and remove epoxy resin, soak 8 hours down at 50 ℃; In the step (F), changing adding concentration into is the sulfuric acid of 200g/L and the solution removal metal coating of the about 10g/L of manganese dioxide (with the sulfuric acid volumescope), heated and stirred, the control temperature behind the reaction 4h, adds entry about 90 ℃, controlling final sulfuric acid concentration is 50g/L, continues reaction 2h.
Embodiment 6:
Other conditions are constant, and in the step (B) with embodiment 1, the sodium hydroxide lye of using instead 1: 5000 is removed light polarizing film, is heated to 90 ℃ and soaks 8 hours; In the step (D), change chloroform into and soak the removal liquid crystal; In the step (F), the proportioning that changes into according to hydrochloric acid, nitric acid, water is the solution removal metal coating of 10: 1: 10 (volume ratio), heated and stirred, and the control temperature is reacted 1h about 90 ℃.
Embodiment 7:
Other conditions are constant, and the display panels of recovery is broken, after directly light polarizing film manually being removed, enters (D) among the embodiment 1; The salpeter solution that changes 1: 3 in the step (F) into is removed metal coating, and the control soaking temperature is about 80 ℃, and the time is 3 hours.
Embodiment 8:
Other conditions are constant, in the step (B) with embodiment 1, use chloroform instead and remove light polarizing film, and normal temperature soaked 8 hours down; In the step (C), be recovered to and be big display panels, the direct use diamant cutting of opening of base plate glass is opened.
Embodiment 9:
Other conditions are constant, and in the step (B) with embodiment 1, the potassium hydroxide alkali lye of using instead 1: 500 is removed light polarizing film, is heated to 50 ℃ and soaks 7 hours; In the step (C), use the sulfuric acid solution of 1: 3 (with the volume ratio of water) instead and remove epoxy resin, soaked 7 hours down at 60 ℃.
Embodiment 10:
Other conditions are constant, in the step (B) with embodiment 1, use the sulfuric acid solution of 1: 1 (with the volume ratio of water) instead and remove light polarizing film, are heated to 90 ℃ and soak 3 hours; In the step (F), changing adding concentration into is the sulfuric acid of 100g/L and the solution removal metal coating of the about 10g/L of manganese dioxide (with the sulfuric acid volumescope), heated and stirred, the control temperature behind the reaction 2h, adds entry about 70 ℃, controlling final sulfuric acid concentration is 50g/L, continues reaction 2h.
Embodiment 11:
Other conditions are constant, in the step (B) with embodiment 1, use chloroform instead and remove light polarizing film, and normal temperature soaked 8 hours down; In the step (F), changing adding concentration into is the sulfuric acid of 600g/L and the solution removal metal coating of the about 10g/L of manganese dioxide (with the sulfuric acid volumescope), heated and stirred, the control temperature behind the reaction 2h, adds entry about 80 ℃, controlling final sulfuric acid concentration is 50g/L, continues reaction 1h.
Claims (10)
1. liquid crystal display panel resource processing method, its feature may further comprise the steps:
A, the complete or broken display panels under will removing remove light polarizing film with the manual method or the method for soaking organic solvent, inorganic acid fluid or alkali lye;
B, the removal that obtains the complete display panels of light polarizing film, or after the frame portion cutting with its sealing-in, open two glass substrates of display panels, or it is soaked with inorganic acid fluid, remove the epoxy resin of sealing-in, after panel cleaned up, open two glass substrates of display panels;
C, the display panels of the fragmentation that obtains among the complete glass substrate that contains liquid crystal that obtains among the step b or the step a is soaked removing the liquid crystal on the glass substrate with organic solvent, and clean up;
D, the glass substrate of the intact liquid crystal of above-mentioned cleaning is soaked with acid leaching liquor, remove the metal coating on the glass substrate, obtain clean glass substrate.
2. liquid crystal display panel resource processing method according to claim 1 is characterized in that containing indium in the acid leaching liquor of the immersion in the steps d, carries out the extraction and the refining of indium with the existing technology of extracting indium.
3. liquid crystal display panel resource processing method according to claim 1 is characterized in that described organic solvent is one or more in acetone, chloroform, benzene, toluene or the dimethylbenzene.
4. liquid crystal display panel resource processing method according to claim 1 is characterized in that described alkali lye is the aqueous solution of NaOH or potassium hydroxide.
5. liquid crystal display panel resource processing method according to claim 1 is characterized in that described inorganic acid fluid is the aqueous solution of nitric acid or sulfuric acid.
6. liquid crystal display panel resource processing method according to claim 1 and 2 is characterized in that described acid leaching liquor is one or more or its aqueous solution in nitric acid, sulfuric acid or the hydrochloric acid.
7. liquid crystal display panel resource processing method according to claim 1 is characterized in that the time of soaking among the step a is 3～8h, and coming off with light polarizing film is as the criterion; Organic solvent is immersed in normal temperature to carry out, and inorganic acid fluid or dipping by lye temperature are controlled at 50～90 ℃.
8. liquid crystal display panel resource processing method according to claim 1 is characterized in that the time of soaking among the step b is 2～8h, and temperature is controlled at 50～90 ℃.
9. liquid crystal display panel resource processing method according to claim 1, after the cleansing power that it is characterized in that organic solvent among the step c descended, the organic solvent that will contain liquid crystal distilled regeneration, distills remaining liquid crystal and carries out burning disposal.
10. liquid crystal display panel resource processing method according to claim 1 is characterized in that the time of soaking in the steps d is 1～6h, and temperature is controlled at 70～90 ℃.
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| CNB2006100882784A CN100392477C (en) | 2006-07-07 | 2006-07-07 | Liquid crystal display panel resource processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI386491B (en) * | 2009-04-07 | 2013-02-21 | Ching Hwa Lee | A method for the resource recovery of scrap liquid crystal display panel |
| CN101690936B (en) * | 2009-10-16 | 2011-06-15 | 清华大学 | Resourceful treatment method of waste thin film transistor liquid crystal monitor |
| CN102207640B (en) * | 2010-03-30 | 2014-05-28 | 比亚迪股份有限公司 | Method for recycling TFT (Thin Film Transistor) liquid crystal display with liquid crystal bubbles |
| CN102951618B (en) * | 2011-08-31 | 2014-07-30 | 深圳市格林美高新技术股份有限公司 | Method for recycling germanium, gallium, indium and selenium in waste diode |
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