FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Diddell Wendy   2. Issuer Name and Ticker or Trading Symbol RICHARDSON ELECTRONICS LTD/DE [RELL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) EVP Corporate Development (Last) (First) (Middle) 40W267 KESLINGER ROAD 3. Date of Earliest Transaction (Month/Day/Year) 12/01/2010 (Street) LAFOX, IL 60147 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 12/01/2010   M(1)   6,903 A $ 7.24 6,903 D   Common Stock 12/01/2010   S(1)   6,903 D $ 10.91 0 D   Common Stock 12/01/2010   M(1)   250 A $ 5.67 250 D   Common Stock 12/01/2010   S(1)   250 D $ 10.91 0 D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (Right to Buy)

$ 7.24

12/01/2010

M

6,903

10/09/2010(2)

10/09/2017

Common Stock

6,903

$ 0

5,597

D

Employee Stock Option (Rigth to Buy)

$ 5.67

12/01/2010

M

250

10/13/2010(3)

10/13/2019

Common Stock

250

$ 0

12,000

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Diddell Wendy 40W267 KESLINGER ROAD LAFOX, IL 60147			EVP Corporate Development

Signatures

Kyle C. Badger, attorney-in-fact for Wendy Diddell		12/02/2010
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The exercise and sale reported in the Form 4 were affected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.
(2)	Partial exercise of an employee stock option of which 2,500 shares each vested on October 9, 2008, 2009, and 2010.
(3)	Partial exercise of an employee option of which 3,000 shares vested on October 13, 2010.

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