Display apparatus

• US 5,767,837 A
• Filed: 04/16/1993
• Issued: 06/16/1998
• Est. Priority Date: 05/17/1989
• Status: Expired due to Term

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Hara, Zenichiro
• Primary Examiner(s): LAO, LUNYI
• Application Number:
  US08/047,615
• Time in Patent Office: 1,887 Days
• Field of Search: 340/752, 340/754, 340/716, 340/717, 340/793, 340/702, 340/703, 340/815.04, 358/240, 358/242, 345/30, 345/40, 345/4, 345/1, 345/151, 345/152, 345/22, 345/72, 345/83
• US Class Current: 345/694
• CPC Class Codes: H04N 9/12 Picture reproducers H04N9/11 takes precedence
• CPC Class Codes: H04N 9/30 using solid-state colour display devices

Abstract

According to a display apparatus of the present invention there can be obtained a smooth display picture free from roughness, of high resolution and high luminance by allowing a local ununiformity in the arrangement pitch of light emitting pixels to an allowable extent under the conventional simple signal processing wherein sampling of a television signal is performed at fixed intervals of time.

Claims

1. A display apparatus including:

a plurality of display devices each having a plurality of light emitting pixels, each pixel including a group of different monochromatic luminescent elements, said pixels being arranged in a matrix form in groups of four in a square configuration so that an intragroup arrangement pitch P₀ between monochromatic luminescent groups in each of the pixel groups is smaller than an intergroup arrangement pitch P₁ between monochromatic luminescent groups in adjacent pixel groups, said monochromatic luminescent elements being arranged so that the intragroup arrangement pitch P₀ for each pixel in each pixel group is smaller than the intergroup arrangement pitch P₁ between adjacent pixel groups; and

drive means for causing each of said light emitting pixels of each of said display devices to emit light in one-to-one correspondence to said data obtained by sampling each individual television signal at fixed intervals of time.

2. A display apparatus according to claim 1, wherein when an unequal pitch rate α

is defined as an equation α

=P₀ /P₁, said apparatus satisfies a relation of 0.8≦

α

<

1.0.

3. A display apparatus comprising:

a plurality of display devices, each of said plurality of display devices including;

a plurality of light emitting pixel groups, each group comprising a plurality of light emitting pixels, each pixel including a group of different monochromatic luminescent elements, arranged so that a pitch P₀ between adjacent light emitting pixels of the same pixel group is less than a pitch P1 between adjacent pixel groups, said groups of monochromatic luminescent elements arranged so that the pitch P₀ between adjacent monochromatic luminescent groups in one group of pixels is less than the pitch P₁ between monochromatic luminescent groups in adjacent pixel groups.

4. A display apparatus according to claim 3, wherein said plurality of light emitting pixels are arranged in matrix form in groups of four.

5. A display apparatus comprising:

a plurality of display devices, each of said plurality of display devices including;

a plurality of light emitting pixel groups, each group comprising a plurality of light emitting pixels, each pixel including a group of different monochromatic luminescent elements, wherein adjacent pixels in each group are spaced an equal distance apart, arranged so that a pitch P₀ between adjacent light emitting pixels of the same group is less than a pitch P₁ between adjacent groups, and said groups of monochromatic luminescent elements arranged so that the pitch P₀ between adjacent monochromatic luminescent groups in one group of pixels is less than the pitch P₁ between monochromatic luminescent groups in adjacent pixel groups.

6. A display apparatus according to claim 5, wherein when an unequal pitch rate α

is defined as pitch P₀ divided by pitch P₁, said apparatus satisfies a relation of 0.8≦

α

<

1.0.

7. A display apparatus according to claim 5, wherein said plurality of light emitting pixels are arranged in matrix form in groups of four.