Rear projection type display device

[Detailed Description of the Invention]

[Industrial Application] the present invention -- a matrix type light valve -- business -- it is related with screen O improvement of theta Projection type wisdom device. [Description of the Prior Art] The screen which obtained the conventional back projection type display harbor 1-grosze Dings, Observa third International, a high screen gain that are indicated to 596 pages of display conferences (Japan display+83), and that carried out projected type CRTVC correspondence, and the extensive aborted fetus viewing angle range is used. * the time ---like -- a screen -- the slot pitch of 1 Missing part lens (lilLt The lenticular lens) 0 lengthwise direction -- projection CRT (in order that Q scanning line may run in the direction of an aborted fetus, the specification and three-pipe 0 To of the degree of aborted fetus Fist are simply compounded on a screen, and the complicated section shape of eye t prevent a color gap is made.) It was decided from the problem of a Construction. [Problem(s) to be Solved by the Invention] However, in the above-mentioned conventional technology, when the light valve which carries out a Ma IJ A cup-like state pixel owner was projected, with 0 pixel of transverse direction of light valve 0 rule notes, the moire pattern on a lenticular lens arose and the fall of resolution and drawing caused deterioration of quality. then, the present invention is solved on such a problem 1, and the place made into the That O object does not spoil the display performance of a matrix type light valve -- a moire pattern -- it is in providing i rear projection type display. In order to solve C problem, back projection type Display # of the O'f= stage] present invention is taken as carrying-out-the bottom of equivalent pitch oHtH which Projection of matrix pixel has-one dimension lens O pitch in back projection screen which carried out the child side VC set Kurahara loses. [Function] Present invention O: Moire pattern ■ pitch kfi Show 11 which arises by the pixel pitch of projection iron of a matrix type light valve, and the pitch of a back projection screen vi dimension lens according to account c1 Purchase [ili:! j hoes 1 - On the level which is not degraded. It can carry out under Ejection. Drawing 2 is a boiled-fish-paste type section To have lenticular lens as a one dimension lens in the sequence ? example friend of the moire pattern which arose with the matrix pixel and the one dimension lens, and this case. carrying out one dimension nature -- /A tl tz Nicicular lens ■ -- it is what sees and has a lens operation one in one way like -- 7 boiled-fish-paste type section Limited like a lenticular lens, and a straw bag -- it may be coarse shape. Pitch P of the moire pattern which caused painter degradation. spatial frequency fo which carried out matrix pixel pitch PoK correspondence, and one dimension lens ■ pitch "t and the spatial frequency which carried out Ic correspondence! It is given as 1'7 difference ((-- Mr. 1)). P = Po I I ... (2)1- it is expressed. This relation is shown in Joyful 2 figure. According to Drawing 3, if a moire pattern pitch exceeds a projection pixel pitch, painter degradation by a moire pattern will become remarkable. When the size of a moire pattern permitted to the utmost considers a projection pixel pitch, a one dimension lens O pitch is less than y2 of a projection pixel pitch from hunger 3 figure. ThisQ -- like -- Pitch t of a one dimension lens - by carrying out Preliminary examination, painter degradation is prevented and an extensive viewing angle range ratio etc. are brought about -- one dimension lens meeting 1'4 a k can take. [Operation sequence] Operation sequence 1 WX1 figure is the back projection type display Pity O style origin in the present invention. 0 Likelihood are condensed with condenser 2 from source 1 of X, and painter t# news is done by matrix type light valve 3. It is lII Formation screen 5 Vc iron i Obtained with spinning-and-weaving lens 4 in water. As a matrix type light valve, vh which had the Ha Liquid crystal matrix type panel for thin film transistors 2 and No. 8 (it one day - passes for details, and is electronics and 1984 year 9 month 11) statement [ 211~240 page ] referred to was used. Pitch t below Fresnel's lens side 6 where screen 5 carries out a convex lens operation on the whole, and projection pixel pitch ■ Slack which is one dimension lenses - Lenticular lens surface 7 which it has is formed. Screen 0 material comprises Light spread material, dye, and a resin material, and are a thing for commercial c+ti projection A projection screens used No. C, and 1wl'4. JI of this operation sequence! It is This ding to the 1st flame about meeting Q specifications. WX l people In this operation sequence, the ratio of a lenticular lens ■ pitched projection pixel pitch is taken to 0.27, and, for a ing reason, the pitch of a moire pattern is a small fence from a projection pixel pitch. The painter's degradation was not observed in actual visual recognition. Operation sequence 2 Operation sequence 2 is a sequence of the color projection type Awful device which piled up and projected R red, G axis, and the matrix painter corresponding to B (2). It is alike and 3 figures are That O lineblock diagrams. the light flux from light source 1 -- a focusing lens -- therefore, it is collimated 2 Vc and decomposed into red, green, and a blue light by red reflective dichroic mirror lO and back reflective dichroic mirror 9. Red and # light are bent by mirror 8. It enters into a matrix type light valve. Each color ft! 1 go [ili compounded next with O red reflective dichroic mirror lO for colored light composition and evening reflective dichroic mirror 9 and origin are projected and Consideration(ed) on screen 5 from Conclusion lens 41C in response to red, green, and the drawing l abnormal conditions that carried out 1rVc correspondence. Fresnel's lens 6 and O lenticular lens for visual-angle expansion which a screen shows a convex lens operation are Shape(ed). The alignment gap between each color ■ projection pixel 11 arises, and a lenticular lens pitch is the second, as it is shown in @4 figure, in order to carry out synthetic projection of the matrix panel. If spectral luminous efficacy is taken into consideration, also in Branch, a pixel gap of green and red will influence. comparing with one sheet upsilon matrix panel 0 Fortune-telling the spatial frequency which arises by such pixel gap It was accompanied by gold composition -- an island -- < -- equivalent to this ---like -- Pitch becomes small 11i11 base. Since projection light penetrates a pixel in fact and the penetration light and lenticular board produce a moire pattern, it is possible to think that the pixel center emitted light and the vertical line of a Ha Point O matrix and a lenticular board has interfered. then -- it should take into consideration -- a few pixel pitch serves as a value which Removal(ed) by one matrix Pitch superposition panel. It becomes half [ of this Absence rule ■ place meeting which is considered to green and red and necessity Q existing, and an one sheet ■ matrix pitch ]. In this operation sequence, 3rd [ The ] figure Om Formation was adopted by the matrix type light valve of operation sequence 112 Jia 1 table, and projection system'i#4n, and the lenticular lens pitch was set to projection pixel pitch upsilon'ADJ, 0 which is the bottom, and 60 m. By adopting This 0 lenticular Pitch, slot 1y and carrying out were completed in back projection type display vc Place 1 without the moire pattern which carries out what of the extensive viewing angle range. Operation sequence 3 The 0-m5 figure whose operation sequence 3 is There was a row for the Ma IJ A cup type Territe valves from which a pixel arrangement pattern differs shows the pixel arrangement pattern. In order that a pixel may shift a This O pattern O place meeting and by turns, one dimension nature of the direction of aborted fetus O pixel pitch is carried out, and it serves as 0 pitch of rejection in equivalent to a S upsilon length stripe. The place where the pitch of the lenticular lens used operation sequence 2 and 1 Master <0.6 (1wac) screen using the light valve in which the projection system shown in the sail l flame in consideration of this and projection pixel pitch 2.59M carry out zigzag type matrix tW. the moire pattern which the extensive viewing angle range ? stomach carries out -- Ha back projection Display Vt'k ?8 To [ zero ] was made. [Effect of the Invention] As stated above, in the present invention, one-dimensional notes are carried out and below equivalent pitch Q half carries out a S Q pitch. therefore, a matrix -- Legible back projection type Display riItt which holds down a moire pattern interval which arises 1 IIJi by equivalent pixel pitch peculiar to base, and a pitch of a one dimension lens to below a pixel and in which image quality does not have Poor TO - it can provide. furthermore -- carrying out one dimension nature -- a S O effect -- Question -- compared with a friend case, the concentration to the viewing angle range of light flux is attained using a pure dispersion screen, and increase in the brightness of a viewing angle range and visual-angle control of the direction of an aborted fetus can be performed.

[Brief Description of the Drawings]

Zhen 1 figure is a present invention 0 rear-projection-type-display On Formation figure. ! 2 figures are a moire pattern O pitch, a one dimension lens pitch, and zero relation t. - It is a shown figure. Jia 3 figure is a lineblock diagram of the color back projection type Squirting device of the present invention. !!4 figure is a front view of the piled-up pixel pattern. Drawing 5 is a pixel pattern ■ front view which a pixel shifts by turns. 1 ... Light source 2 ... Condenser 3 -- Matrix type light valve 4 ... Connection lens 50. - screen 7 ... Lenticular lens 11 ... Projected matrix pixel Or more Drawing 1 Drawing 2 Drawing 4 Drawing 5