Sony Corporation

Yasuhiro Tagawa

Takeo Arai

Takashi Oku

Yutaka Ota

Koichiro Kakinuma

Shuichi Haga

Takehiro Nakatsue

Tatsuhiko Matsumoto

Eizo Okamoto

A self-light emitting device panel includes: a pixel array in which pixel trios each including a set of three light emitting devices which emit light of three primary colors respectively are arranged in matrix in a row direction and a column direction; a plurality of column lines extending in the column direction of the pixel array, arranged in a cyclic manner in different proportions according to corresponding colors in the row direction, which are connected to one ends of plural light emitting devices emitting light of corresponding colors in the column of the pixel trios arranged in the same column; and a plurality of row-scanning lines extending in the row direction of the pixel array, arranged so as to be separated between at least two colors, which are connected to the other ends of the light emitting devices emitting light of corresponding colors.

Self-light emitting device panel, image display device and passive driving method of self-light emitting devices

Disclosed is a backlight device for illuminating a transmissive color liquid crystal display panel from its backside with white light. The backlight device includes, as a light source, a plural number of principal light emitting diode units, and a plural number of subsidiary light emitting diode units, where m and n are natural numbers. Each principal light emitting diode unit is made up by a plural number of light emitting diodes () arrayed in a string and emits white light of preset chromaticity. Each subsidiary light emitting diode unit is made up by a plural number of light emitting diodes () arrayed in a string and emits white light of chromaticity in the vicinity of the preset chromaticity. The number of the subsidiary light emitting diode units is smaller than that of the principal light emitting diode units. When the principal light emitting diode units and the subsidiary light emitting diode units are arrayed in a two-dimensional matrix, the subsidiary light emitting diode unitsare arrayed without being juxtaposed on the same row, and the subsidiary light emitting diode units, arrayed in a center column of the two-dimensional matrix, are arrayed towards the center of a color liquid crystal display panel ().

Backlight device

A color filter () used in a transmissive color liquid crystal display panel of a color liquid crystal display (LCD) apparatus. This color filter () is constituted by a tristimulus color filter for wavelength-selecting and transmitting red light, green light and blue light. Mixing of blue color and red color is prohibited by not having the transmission wavelength band of the red filter CFR overlaid substantially on the transmission wavelength band of the blue filter CFB.

Color filter and color LCD apparatus having red filter with a peak wavelength between 685 nm and 690 nm and a red light source having a peak wavelength of between 640 nm and 645 nm

Disclosed is a backlight device used for a color liquid crystal display (LCD) apparatus. The red light, green light and blue light, generated by a light source, made up by a red light emitting diode (R), a green light emitting diode (G) and a blue light emitting diode (B), respectively, are mixed together to generate white light. The red light has a half-value width hwr such that 15 nm&#x2266;hwr&#x2266;30 nm, and the green light has a half-value width hwg such that 25 nm&#x2266;hwg&#x2266;50 nm. The blue light has a half-value width hwb such that 15 nm&#x2266;hwb&#x2266;30 nm. The white light illuminates a transmissive color liquid crystal display panel () from its back side. The transmissive color liquid crystal display panel includes a color filter () made up by a tristimulus filter for wavelength-selecting and transmitting red light, green light and blue light.

Backlight device and color liquid crystal display apparatus

A control device can stably control the quantity of the emitted light of a backlight unit by means of a simple arrangement. The control device comprises an electric current supply section for supplying a predetermined drive current to a group of light emitting elements, a quantity of emitted light detecting section for detecting the quantity of light emitted from the group of light emitting elements, a temperature detecting section for detecting the temperature of the backlight unit, a reference quantity of light outputting section for outputting a reference quantity of light for the light emitting elements of each color and a control section for controlling the electric current supply section so as to make it supply a constant drive current to the light emitting elements of blue color according to the quantity of emitted light detected by the quantity of emitted light detecting section, the temperature detected by the temperature detecting section, and the reference quantity of light output from the reference quantity of light outputting section and supply a predetermined drive current to the light emitting elements of red color and those of green color according to the constant drive current supplied to the light emitting elements of blue color.

Growing community of inventors

Tokyo, Japan

Yasuhiro Tagawa