CN100363788C - Liquid crystal panel and liquid crystal display device - Google Patents
Liquid crystal panel and liquid crystal display device Download PDFInfo
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- CN100363788C CN100363788C CNB2004100458459A CN200410045845A CN100363788C CN 100363788 C CN100363788 C CN 100363788C CN B2004100458459 A CNB2004100458459 A CN B2004100458459A CN 200410045845 A CN200410045845 A CN 200410045845A CN 100363788 C CN100363788 C CN 100363788C
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 64
- 230000003287 optical effect Effects 0.000 claims description 42
- 230000035515 penetration Effects 0.000 claims description 28
- 238000001514 detection method Methods 0.000 claims description 9
- 238000003491 array Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 14
- 239000000758 substrate Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 210000000887 face Anatomy 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
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Abstract
The present invention discloses a liquid crystal panel having improved color concentration and brightness. A subpixel with a transflective region is extra added in pixels with red subpixels, green subpixels and blue subpixels to improve the effectiveness of the liquid crystal panel. The liquid crystal panel of the present invention comprises a plurality of pixels which are arrayed into arrays, each pixel comprises a red subpixel, a green subpixel, a blue subpixel and an auxiliary subpixel, wherein the auxiliary subpixel has the transflective region (transflective).
Description
Technical field
(liquid crystal display LCD), particularly relates to the liquid crystal panel that a kind of tool improves color density and brightness to the present invention relates to a kind of LCD.
Background technology
Because thin thickness, in light weight, and economize the characteristic of electrification, LCD (LCD) has been widely used on the electronic products such as Portable personal computer, digital camera, projector.Generally speaking, liquid crystal panel can be divided into penetration (transmissive type), reflective (reflective type), and Transflective formula (transflective type) three major types.As light source, as light source, Transflective formula liquid crystal panel then utilizes backlight module or surround lighting as light source to reflection type liquid crystal panel to the penetration liquid crystal panel with surround lighting with a backlight module.
Please refer to Fig. 1 and 2, wherein Fig. 1 shows the floor map of a dot structure in traditional liquid crystal panel, and Fig. 2 shows along the diagrammatic cross-section of 2-2 line among Fig. 1.Dot structure 101 in the liquid crystal panel comprises according to strip columnwise to be arranged inferior pixel (sub-pixel) 101R of the redness of putting, green time pixel 101G, reaches blue sub-pixels 101B.Pixel comprises substrate 100, an element layer 104, a liquid crystal layer, liquid crystal layer 106, an optical filter 103 or 105 or 107, an and upper substrate 102 each time.Element layer 104 is arranged at down substrate 100 tops, and it can comprise gate line, data line, transistor, passive state protective seam, reach pixel electrode etc., be simplicity of illustration herein, only show a smooth substrate.Substrate 102 is oppositely arranged with following substrate 100 on one. Optical filter 103 or 105 or 107 is arranged at the substrate 100 that faces down in the substrate 102, wherein optical filter 103,105, and 107 correspond respectively to red pixel 101R, green time pixel 101G, and blue sub-pixels 101B.Liquid crystal layer 106 is arranged at element layer 104 and optical filter 103,105, reaches between 107.
In penetration or reflective liquid crystal panel,, must increase the concentration of dyestuff (Pigment) in the thickness of optical filter or the optical filter in order to meet the demand of high color density.Yet thus, the reflectivity meeting of the light transmittance of penetration liquid crystal panel or reflection type liquid crystal panel thereby reduction cause the brightness of panel to reduce.In addition, in the panel of LCD of Transflective formula, under the reflective-mode, light needs after filtration mating plate twice, therefore the colour saturation of reflective-mode can be higher than the pattern of penetrating, and brightness simultaneously also can reduce, and the area of increase echo area can reach the effectiveness that highlights, but the reduction for colour saturation does not have help, is the problem that can't solve color balance (Color balance).
Therefore (cathode ray tube, CRT) technology are necessary to seek other dot structure, with colour saturation and the brightness that improves all kinds of panels, and then improve the display quality of liquid crystal panel because LCD Technology replaces traditional cathode-ray tube (CRT) gradually.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of liquid crystal panel, its have redness, green, and the pixel of blue sub-pixels in additionally add one and have the inferior pixel in Transflective zone, use the usefulness of improving panel.
Another object of the present invention is to provide a kind of LCD, its utilization has the panel construction and a panel control circuit of four pixels, with dual adjustment liquid crystal panel, and then improves the color of panel and improves brightness.
According to above-mentioned purpose, the invention provides a kind of liquid crystal panel, it comprises a plurality of pixels that are arranged in array, each pixel comprises a red inferior pixel, a green inferior pixel, a blue sub-pixels, reaches an auxiliary inferior pixel, wherein should redness, green and blue sub-pixels all have a full penetration region or all have a total reflection zone, and should auxiliary time pixel has a Transflective zone, a penetration region, and any of a reflector space.
Auxiliary pixel can comprise a white optical filter, a yellow filter, a green color filter, a white and green color filter, and any of white and yellow filter.
Moreover, red, green, blue, and auxiliary time pixel can be listed as (strip) formula row according to bar and put or put according to mosaic (mosaic) row.
According to above-mentioned purpose, the invention provides a kind of LCD again, it comprises a liquid crystal panel, and it comprises: a plurality of pixels, an optical detector, a contrast calculation element, a color control device, the liquid crystal panel drive that are arranged in array.Each pixel comprises a red inferior pixel, a green inferior pixel, a blue sub-pixels, reaches an auxiliary inferior pixel, wherein should redness, green and blue sub-pixels all have a full penetration region or all have a total reflection zone, and should auxiliary time pixel has a Transflective zone, a penetration region, and any of a reflector space.The brightness of optical detector detecting surround lighting is to export a detection signal.The contrast calculation element calculates the contrast of liquid crystal panel according to detection signal, and exports one first contrast and adjust signal.Color control apparatus is adjusted signal according to first contrast again and is changed a color signal of video signal.Liquid crystal panel drive then receives the color image signal that is converted and exports a drive signal, to drive liquid crystal panel.
Above-mentioned LCD also comprises a manual overvide and a signal switching apparatus.Manual overvide is exported one second contrast and is adjusted signal, and signal switching apparatus receives first contrast and adjusts signal and second contrast and adjust signal and select one and export color control apparatus to the conversioning colour signal of video signal.
Auxiliary pixel can comprise a white optical filter, a yellow filter, a green color filter, a white and green color filter, and any of white and yellow filter.
Moreover, red, green, blue, and auxiliary time pixel can put or put according to strip columnwise row according to mosaic row.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. elaborates.
Description of drawings
Fig. 1 shows the floor map of a dot structure in traditional liquid crystal panel.
Fig. 2 shows along the diagrammatic cross-section of 2-2 line among Fig. 1.
Fig. 3 shows the floor map according to the liquid crystal panel of the embodiment of the invention.
Fig. 4 A shows the pixel planes synoptic diagram according to half anti-half through display panels of the embodiment of the invention.
Fig. 4 B shows the pixel planes synoptic diagram according to a reflecting type liquid crystal display panel of the embodiment of the invention.
Fig. 4 C shows the pixel planes synoptic diagram according to a penetrate through type liquid crystal display board of the embodiment of the invention.
Fig. 5 shows the double-colored auxiliary time pixel planes synoptic diagram according to the embodiment of the invention.
Fig. 6 A shows the double-colored auxiliary time pixel planes synoptic diagram with penetration region according to the embodiment of the invention.
Fig. 6 B shows the double-colored auxiliary time pixel planes synoptic diagram with reflector space according to the embodiment of the invention.
Fig. 7 shows the pixel planes synoptic diagram that mosaic is arranged the display panels of putting that has according to the embodiment of the invention.
Fig. 8 shows the block schematic diagram according to the LCD of the embodiment of the invention.
The simple symbol explanation
Existing
100～infrabasal plate; 101～pixel; 101B～blue sub-pixels; 101G～green time pixel; 101R～redness time pixel; 102～upper substrate; 103～Red lightscreening plate; 104～element layer; 105～green color filter; 106～liquid crystal layer; 107～blue color filter.
The present invention
10～optical detector; 11～detection signal; 12～contrast calculation element; Signal is adjusted in 13～the first contrasts; 14～manual overvide; Signal is adjusted in 15～the second contrasts; 16～signal switching apparatus; 17～color image signal; 18～color control apparatus; 19～color image the signal that is converted; 20～liquid crystal panel drive; 21～drive signal; 200～liquid crystal panel; 201～pixel; 201A～auxiliary time pixel; 201B～blue sub-pixels; 201G～green time pixel; 201R～redness time pixel; 202～penetration region; 203～Red lightscreening plate; 204～reflector space; 205～green color filter; 206～Transflective zone; 207～blue color filter; 209～auxiliary optical filter; 209 '～white portion; 209 "～yellow or green portion.
Embodiment
Please refer to Fig. 3 and Fig. 4 A, Fig. 3 shows the floor map according to the liquid crystal panel of the embodiment of the invention, and Fig. 4 A shows the pixel planes synoptic diagram according to half anti-half through display panels of the embodiment of the invention.In Fig. 3, liquid crystal panel 200 comprises a plurality of pixels 201 that are arranged in array., be simplicity of illustration herein, each pixel 201 is represented it with a blank block.
Next, please refer to Fig. 4 A, each pixel 201 comprises one red pixel (sub-pixel) 201R, green time pixel 201G, blue sub-pixels 201B, and auxiliary (auxiliary) inferior pixel 201A, and pixel is put according to strip columnwise row each time.
In the present embodiment, auxiliary time pixel 201A has a Transflective zone 206, and it is made of a penetration region 202 and a reflector space 204.Moreover, red pixel 201R, green time pixel 201G, and blue sub-pixels 201B then have Transflective zone 206 equally.In addition, pixel comprises an optical filter each time, in order to show different colors.For example, red pixel 201R comprise a Red lightscreening plate 203, green time pixel 201G comprise a green color filter 205, and blue sub-pixels 201B comprise a blue color filter 207.In addition, auxiliary time pixel 201A then comprises an auxiliary optical filter 209.Herein, the penetrance of auxiliary optical filter 209 need be higher than redness or blue color filter, with the brightness of effective increase pixel 201.For example, auxiliary optical filter 209 be white (colourless or transparent), yellow, and any optical filter of green.
Next, please refer to Fig. 4 B, it shows the pixel planes synoptic diagram according to a reflecting type liquid crystal display panel of the embodiment of the invention, and wherein the parts in Fig. 4 A use identical label.One pixel 201 of reflecting type liquid crystal display panel 200 comprises a red inferior pixel 201R, green time pixel 201G, blue sub-pixels 201B, reaches an auxiliary inferior pixel 201A, and pixel is put according to strip columnwise row each time.
In Fig. 4 B, auxiliary time pixel 201A has a Transflective zone 206, and it is made of a penetration region 202 and a reflector space 204.Moreover, red pixel 201R, green time pixel 201G, and blue sub-pixels 201B then have reflector space 204.In addition, pixel comprises an optical filter each time.For example, red pixel 201R comprise a Red lightscreening plate 203, green time pixel 201G comprise a green color filter 205, and blue sub-pixels 201B comprise a blue color filter 207.In addition, auxiliary time pixel 201A then comprises an auxiliary optical filter 209.Herein, auxiliary optical filter 209 be white (colourless or transparent), yellow, and any optical filter of green.
Next, please refer to Fig. 4 C, it shows the pixel planes synoptic diagram according to a penetrate through type liquid crystal display board of the embodiment of the invention, and wherein the parts in Fig. 4 A use identical label.One pixel 201 of Transflective formula display panels 200 comprises a red inferior pixel 201R, green time pixel 201G, blue sub-pixels 201B, reaches an auxiliary inferior pixel 201A, and pixel is put according to strip columnwise row each time.
In Fig. 4 C, auxiliary time pixel 201A has a Transflective zone 206, and it is made of a penetration region 202 and a reflector space 204.Moreover, red pixel 201R, green time pixel 201G, and blue sub-pixels 201B then have penetration region 202.In addition, pixel comprises an optical filter each time.For example, red pixel 201R comprise a Red lightscreening plate 203, green time pixel 201G comprise a green color filter 205, and blue sub-pixels 201B comprise a blue color filter 207.In addition, auxiliary time pixel 201A then comprises an auxiliary optical filter 209.Herein, auxiliary optical filter 209 be white (colourless or transparent), yellow, and any optical filter of green.
When making liquid crystal panel 200, can be by adjusting the area ratio of penetration region 202 with reflector space 204, adjust color density and pixel intensity, adopt the purposes of white optical filter, the firstth, adjust the colour saturation of panel by the principle of white light colour mixture, the secondth, reach the advantage that brightness improves by the high penetration (low absorptivity) of white optical filter.Adopt yellow or green color filter to be because human eye is comparatively responsive for green or yellow identification under high brightness, therefore need the higher color saturation degree, the secondth, the penetrance of white optical filter, green color filter and yellow filter is to be higher than blue and redness, and therefore the raising for brightness also is helpful.
Above-mentioned auxiliary optical filter 209 has the optical filter of solid color, yet the present invention is not defined in this, and auxiliary optical filter 209 also can adopt double-colored optical filter.Please refer to Fig. 5, it shows double-colored auxiliary pixel planes synoptic diagram according to the embodiment of the invention, and wherein the parts in Fig. 4 A use identical label.Auxiliary time pixel 201A comprises a double-colored auxiliary optical filter 209.In the present embodiment, auxiliary optical filter 209 has at least one white portion 209 ' and at least one yellow or green portion 209 ".For example, have a white portion 209 ' and a yellow or green portion 209 in the penetration region 202 of assisting time pixel 201A with Transflective zone 206 ", and have a white portion 209 ' and a yellow or green portion 209 equally at reflector space 204 ".Therefore, penetration, reflective, and Transflective formula display panels 200 all can utilize double-colored auxiliary pixel 209 to increase brightness and improve colour saturation.Adopt dichroic filter, it is the colour saturation of adjusting panel by the white light colour mixture of dichroic filter, another green or yellow partly of dichroic filter then is to mend green or yellow color saturation, be noted that in the above-mentioned double-colored auxiliary time pixel 209, penetration region 202 and reflector space 204 respectively have a white portion 209 ' and a yellow or green portion 209 ".Yet penetration region 202 and reflector space 204 can have a plurality of white portions 209 ' and a plurality of yellow or green portion 209 separately ".
Above-mentioned double-colored auxiliary time pixel 201A has Transflective zone 206, yet the present invention is not defined in this, and double-colored auxiliary time pixel 201A also can have penetration region 202 or reflector space 204.Please refer to Fig. 6 A and 6B, it shows double-colored auxiliary the pixel planes synoptic diagram with penetration region and reflector space according to the embodiment of the invention respectively, and wherein the parts in Fig. 5 use identical label.In Fig. 6 A, the auxiliary time pixel 201A with penetration region 202 comprises a dichroic filter 209, and it has a white portion 209 ' and a yellow or green portion 209 ".Similarly, dichroic filter 209 also can have a plurality of white portions 209 ' and a plurality of yellow or green portion 209 ".
Moreover in Fig. 6 B, the auxiliary time pixel 201A with reflector space 204 comprises a dichroic filter 209, and it has a white portion 209 ' and a yellow or green portion 209 ".Similarly, dichroic filter 209 also can have a plurality of white portions 209 ' and a plurality of yellow or green portion 209 ".
In the foregoing description, inferior pixel 201R, 201G in the pixel 201 of liquid crystal panel 200,201B, and 201A put according to strip columnwise row, yet the present invention is not defined in this, these times pixel 201R, 201G, 201B, and 201A also can put according to mosaic (mosaic) row, as shown in Figure 7., be simplicity of illustration herein, pixel system represents it with a blank block each time.
Next, please refer to Fig. 8, it shows the block schematic diagram according to the LCD of the embodiment of the invention.LCD comprises a liquid crystal panel 200, an optical detector 10, a contrast calculation element 12, a manual overvide 14, a signal switching apparatus 16, a color control device 18, reaches a liquid crystal panel drive 20.Liquid crystal panel 200 comprises and is arranged in a pixel 201 more than the array, as shown in Figure 3.Each pixel 201 comprises one red pixel 201R, one green pixel 201G, a blue sub-pixels 201B, and one auxiliary pixel 201A, and wherein auxiliary time pixel 201A has a Transflective zone 206, as Fig. 4 A, 4B, and 4C shown in.
Because the contrast of liquid crystal panel 200 can reduce when the brightness of surround lighting was higher, cause naked eyes to be difficult for or identification image clearly.Therefore, in the present embodiment, LCD is detected the brightness of surround lighting by optical detector 10, to export a detection signal 11.Contrast calculation element 12 converts thereof into a brightness value after receiving detection signal 11.Then calculate the contrast of liquid crystal panel 200 again according to brightness value, and export one first contrast and adjust signal 13.Color control apparatus 18 is adjusted the color image signal 17 that signal 13 inputs to color control apparatus 18 according to first contrast.Liquid crystal panel drive 20 receives the color image signal 19 that is converted and exports a drive signal 21 and drives liquid crystal panel 200, uses liquid crystal molecules tilt angle in the automatic adjustment liquid crystal panel 200.In addition, signal switching apparatus 16 optionally is coupled between contrast calculation element 12 and the manual overvide 14, wherein manual overvide 14 contrasts adjustment signal 15 in order to export one second, and signal switching apparatus 16 is to export color control apparatus 18 to conversioning colour signal of video signal 17 in order to receive the first contrast adjustment signal 13 and the second contrast adjustment signal 15 and to select one.Herein, signal switching apparatus 16 only when not receiving the second contrast adjustment signal 15, is just exported the first received contrast and is adjusted signal 13 to color control apparatus 18.Thus, according to LCD of the present invention, can carry out the panel contrast by automatic or manual and adjust.Moreover, can come dual adjustment liquid crystal panel by dot structure, and then improve the color of panel and improve brightness with four pixels.
Though the present invention discloses as above with preferred embodiment; yet it is not in order to limit the present invention; those skilled in the art can do a little change and retouching without departing from the spirit and scope of the present invention, thus protection scope of the present invention should with accompanying Claim the person of being defined be as the criterion.
Claims (8)
1. liquid crystal panel comprises:
Be arranged in a plurality of pixels of array, each described pixel comprises a red inferior pixel, a green inferior pixel, a blue sub-pixels, reaches an auxiliary inferior pixel, wherein should redness, green and blue sub-pixels all have a full penetration region or all have a total reflection zone, and should auxiliary time pixel have a Transflective zone.
2. liquid crystal panel as claimed in claim 1, wherein this auxiliary time pixel also comprises any of white, yellow, green, white and green and white and yellow filter.
3. liquid crystal panel comprises:
Be arranged in a plurality of pixels of array, each described pixel comprises a red inferior pixel, a green inferior pixel, a blue sub-pixels, reaches an auxiliary inferior pixel, wherein should auxiliary time pixel have a penetration region and a reflector space any and comprise a dichroic filter, this dichroic filter is any in a white and green color filter and white and the yellow filter.
4. LCD comprises:
One liquid crystal panel, it comprises:
Be arranged in a plurality of pixels of array, each described pixel comprises a red inferior pixel, a green inferior pixel, a blue sub-pixels, reaches an auxiliary inferior pixel, wherein should redness, green and blue sub-pixels all have a full penetration region or all have a total reflection zone, and should auxiliary time pixel have a Transflective zone;
One optical detector, the brightness of detecting surround lighting is to export a detection signal;
One contrast calculation element calculates the contrast of this liquid crystal panel according to this detection signal, and exports one first contrast and adjust signal;
One color control device is adjusted signal according to this first contrast and is changed a color signal of video signal; And
One liquid crystal panel drive receives this color image signal that is converted and exports a drive signal, to drive this liquid crystal panel.
5. LCD as claimed in claim 4 also comprises:
One manual overvide is adjusted signal in order to export one second contrast; And
One signal switching apparatus receives this first contrast and adjusts signal and this second contrast and adjust signal and select one and export this color control apparatus to change this color image signal.
6. LCD as claimed in claim 4, wherein this auxiliary time pixel also comprises any of white, yellow, green, white and green and white and yellow filter.
7. LCD comprises:
One liquid crystal panel, it comprises:
Be arranged in a plurality of pixels of array, each described pixel comprises a red inferior pixel, a green inferior pixel, a blue sub-pixels, reaches an auxiliary inferior pixel, wherein should assist time pixel one penetration region or a reflector space and comprise a dichroic filter, this dichroic filter is any in a white and green color filter and white and the yellow filter;
One optical detector, the brightness of detecting surround lighting is to export a detection signal;
One contrast calculation element calculates the contrast of this liquid crystal panel according to this detection signal, and exports one first contrast and adjust signal;
One color control device is adjusted signal according to this first contrast and is changed a color signal of video signal; And
One liquid crystal panel drive receives this color image signal that is converted and exports a drive signal, to drive this liquid crystal panel.
8. LCD as claimed in claim 7 also comprises:
One manual overvide is adjusted signal in order to export one second contrast; And
One signal switching apparatus receives this first contrast and adjusts signal and this second contrast and adjust signal and select one and export this color control apparatus to change this color image signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100458459A CN100363788C (en) | 2004-05-20 | 2004-05-20 | Liquid crystal panel and liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100458459A CN100363788C (en) | 2004-05-20 | 2004-05-20 | Liquid crystal panel and liquid crystal display device |
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| CN1580877A CN1580877A (en) | 2005-02-16 |
| CN100363788C true CN100363788C (en) | 2008-01-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7916245B2 (en) * | 2006-03-20 | 2011-03-29 | Sharp Kabushiki Kaisha | Display device |
| CN101900899B (en) * | 2009-05-25 | 2012-03-07 | 瀚宇彩晶股份有限公司 | Optical touch panel structure |
| TWI437336B (en) * | 2010-10-28 | 2014-05-11 | Au Optronics Corp | Pixel unit |
| TWI648726B (en) * | 2017-11-14 | 2019-01-21 | 友達光電股份有限公司 | Display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159230A (en) * | 1995-07-17 | 1997-09-10 | 精工爱普生株式会社 | Reflection type color liquid crystal device and electronic appliance using the same |
| JP2001306023A (en) * | 2000-04-18 | 2001-11-02 | Seiko Epson Corp | Image display device |
| CN1353548A (en) * | 2000-11-13 | 2002-06-12 | 台达电子工业股份有限公司 | Intelligent autoamtic brightness contrast and colour compensation system |
| CN1360220A (en) * | 2000-12-22 | 2002-07-24 | 精工爱普生株式会社 | Liquid crystal display and electronic device |
-
2004
- 2004-05-20 CN CNB2004100458459A patent/CN100363788C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159230A (en) * | 1995-07-17 | 1997-09-10 | 精工爱普生株式会社 | Reflection type color liquid crystal device and electronic appliance using the same |
| JP2001306023A (en) * | 2000-04-18 | 2001-11-02 | Seiko Epson Corp | Image display device |
| CN1353548A (en) * | 2000-11-13 | 2002-06-12 | 台达电子工业股份有限公司 | Intelligent autoamtic brightness contrast and colour compensation system |
| CN1360220A (en) * | 2000-12-22 | 2002-07-24 | 精工爱普生株式会社 | Liquid crystal display and electronic device |
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